THE 38th ANNUAL MEETING OF THE WATERBIRD SOCIETY AND THE 13th CONGRESS FOR THE STUDY AND CONSERVATION OF THE BIRDS IN MEXICO (CECAM) Program/Programa

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3 THE 38th ANNUAL MEETING OF THE WATERBIRD SOCIETY AND THE 3th CONGRESS FOR THE STUDY AND CONSERVATION OF THE BIRDS IN MEXICO (CECAM) Program/Programa

4 Waterbird Society/Mesa Directiva President: Susan B. Elbin Vice President (President Elect: Erika Nol) Secretary: M. Clay Green Treasurer: Christine Custer Mesa Directiva CIPAMEX President: José Fernando Villaseñor Gómez Vice President: Teresa Patricia Feria Arroyo Secretariat: Laura Eugenia Villaseñor Gómez Treasurer: Patricia Ramírez Bastida Local Committee / Comité Local Ricardo Rodríguez Estrella (Chair) Felipe Chávez Ramírez Silvia Alzaga Mayagoitia (Logistics) Scientific Program Coordinators/ Coordinadores Programa Científico Waterbirds: Erika Nol CIPAMEX: Leonardo Chapa Sponsors/Patrocinadores Centro de Investigaciones Biológicas del Noroeste, S.C. (CIBNOR) Consejo Nacional de Ciencia y Tecnología (CONACyT)

5 Acknowledgments /Agradecimientos We thank the following people for their logistical support for the realization of the joint meeting: Queremos agradecer a las siguientes personas por su apoyo logístico para la realización del Congreso: Paulina Meza Navarro Dulce María Jara León Mónica Valdez Borboa Francisco J. Partida Padilla Hugo Iván Geraldo González Jorge Armando Collins Gómez Claudia Jeannette Pérez Estrada Alma A. Sánchez Claudia Morales Sánchez Lidia Griselda Nava Zúñiga Laura B. Rodríguez Rivera Denisse Morales Perea Pablo Partida Idael Ruíz Salvador Loranca Liliana Paredes Lozano Cristina González Rubio San Vicente Pablo Lobera Marco Antonio Díaz Serna Pedro Tsuchiya Rosa Isela Rojano Aldo J. Vargas Mendieta Diana L. Dorantes Salas Cecilia Montes Onofre Susana Reynoso Ventura Mireya Godínez López Gerardo Hernández made the design of the poster and the program book / realizó el diseño del poster y libro del programa. Eliseo Sanchez Gallegos. Graphic designer of the event, logo / Diseñador gráfico del evento y del logo. Romeo Tinajero and RRE made arrangements for field trips / realizaron los arreglos necesarios para las salidas al campo.

6 WELCOME PRESIDENT WATERBIRDS/ BIENVENIDA PRESIDENTE Welcome to the 38th annual meeting of the Waterbird Society in La Paz, the capital of Baja California Sur, Mexico. In 2006, the Waterbird Society met in Vera Cruz, Mexico, as part of the IV NOAC meeting. It s great to be back in Mexico, focusing on waterbirds. La Paz, in English, means peace. We will have the opportunity to start our day in tune with nature, doing tai chi on the beach (led by our own Sifu Felipe Chavez-Ramirez). This is the first time we will be meeting in Baja; the first time that Centro de Investigaciones Biológicas del Noroeste S.C. (CIBNOR) will be our host. We are happy to be meeting jointly with La Sociedad para el Estudio y Conservación de las Aves en México (CIPAMEX). CIPAMEX, by the way, is celebrating the 3th Congress for the Study and Conservation of the Birds in Mexico (CECAM). Felicitaciones! We are truly surrounded by desert, coast, and sea. The Sonoran Desert dominates the landscape, the Pacific Ocean borders Baja on the west and the Sea of Cortez surrounds the eastern coastline. There will be opportunity to go on a field trip to visit the most important wetland in southern Baja California Peninsula, Chametla. Or you can go fishing with the waterbirds at Loreto Bay-San Javier Mountains. In addition, there are daily trips going to La Paz Bay and Isla Espíritu Santo. I hope you can take advantage of some of the field trips or have reserved some time to go birding on your own. Enjoy the peaceful landscape and the exciting topics; reach out to old and new colleagues; get to know new birds and new waterbird biologists while you re here in La Paz. As you read through the program, you will discover the outstanding scientific program planned for this meeting. The local committee did a phenomenal job even while the city was recovering from a major hurricane. Many thanks to the team who made this meeting happen our local host CIBNOR, the local committee (Ricardo Rodriguez Estrella and Felipe Chavez-Ramirez), the scientific program co-chairs (Erica Nol and Leonardo Chapa Vargas), and to CONACYT for supporting participants from Latin America. Deseando una reunión increíble! See you on the beach. Susan B. Elbin President, The Waterbird Society

7 WELCOME PRESIDENT CIPAMEX/BIENVENIDA DEL PRESIDENTE Dear Colleagues: Welcome! The opportunity to participate in this meeting is unique; for the first time the Sociedad para el Estudio y Conservación de las Aves en México A.C. (CIPAMEX) joins with the Waterbird Society to have a united meeting in the beautiful city of La Paz, Baja California Sur. Both, the Waterbird Society and CIPAMEX, include in their memberships numerous and outstanding biologists, researchers, conservationists, students, and people interested in various aspects of the study and conservation of birds. Although we all share a common interest, the different approaches of our societies (geographic and biological), will allow us during these days to talk, to share experiences, and to develop innovative visions for the study of birds. The members of the scientific and local committees have dedicated many hours to the organization of this gathering. Their objective has been to make this Congress a feedback and learning experience, as well as to further relations of cooperation and friendship among all participants, and to contribute to the advancement of ornithology and conservation of birds at the national and international levels. Again, I am pleased to welcome you, and hope that you have most pleasant stay and a positive experience in this city of La Paz, B.C.S. Sincerely, José Fernando Villaseñor Gómez President, Sociedad para el Estudio y Conservación de las Aves en México A.C. Estimados colegas: La oportunidad de estar presentes en esta reunión es única; por vez primera la Sociedad para el Estudio y Conservación de las Aves en México A.C. (CIPAMEX) se suma con la Waterbird Society para realizar un congreso conjunto en la bella y turística ciudad de La Paz, Baja California Sur. Bienvenidos sean todos Ustedes. Tanto la Waterbird Society como CIPAMEX, incluye dentro de su membresía a numerosos y destacados biólogos, investigadores, conservacionistas, estudiantes e interesados en diversos aspectos del estudio y conservación de las aves. Aunque todos compartimos un interés común, los diferentes enfoques, uno geográfico y el otro más biológico, nos permitirán durante estos días dialogar, compartir experiencias y desarrollar visiones innovadoras para el estudio de las aves. Para la organización de esta reunión, los integrantes del comité científico y el comité local han invertido muchas horas de dedicación, esfuerzo y trabajo, para hacer de este congreso una experiencia de retroalimentación y aprendizaje, que además fomente las relaciones de colaboración y amistad de todos los participantes, y contribuya al avance de la ornitología y la conservación de las aves a nivel nacional e internacional. Sean nuevamente bienvenidos, deseándoles tengan una agradable estancia y una experiencia muy positiva en esta ciudad de La Paz, B.C.S. Un abrazo fraternal José Fernando Villaseñor Gómez Presidente, Sociedad para el Estudio y Conservación de las Aves en México A.C.

8 WELCOME FROM THE CHAIR OF THE SCIENTIFIC PROGRAM / BIENVENIDA COMITÉ CIENTÍFICO Dear Conference Attendants, On behalf of the Waterbird Society, CIPAMEX (the Society for Bird Study and Conservation in Mexico), and CIBNOR (the Northwest Center for Biological Research, our local host) we are pleased to welcome you to this year s joint meeting at La Paz. We anticipate a very productive conference that will include talks on bird conservation in the neotropics and a variety of topics focusing on aquatic birds. We have five symposia and three plenaries as will as a mini-informal plenar, and we hope that this meeting will be the beginning of greater cooperation across the Americas in our mutual goal of understanding and conservation of bird populations. Most (but not all) contributions on neotropical bird migration will be from CIPAMEX folks. This section of the conference will include one of the five symposia, 48 oral presentations, and 36 posters. This year, the local committee secured generous financial support from CONACYT, the main Science Foundation Organization in Mexico, for a large number of travel awards for Latin American students. Therefore, through several student talks and a special Latin American student poster session, both students looking for continuing their education and faculty members looking for new collaborations with students will have the opportunity to interact with each other in a casual manner. In addition, in recent years, a new generation of young enthusiastic Mexican Ornithologists has emerged. Consequently, Mexican Ornithology has started to incorporate a rich variety of topics that used to be uncommon in Mexico such as ecological niche modeling, population genetics, ecotoxicology, population and community ecology, bird parasites, and bioacoustics. It is in part for this reason that Huitzil, the Mexican Journal of Ornithology was recently included in SciELO. On Wednesday, Dr. Katherine Renton, the first plenary speaker and former president of CIPAMEX, will present results of her investigations on resource use by Psittacids in Mexico. One symposium on the Mexican Golden Eagle, three sessions on bird conservation in the neotropics, one using genetic tools in ornithology and two miscellaneous sessions should suffice to present a great overview of the current state of excitement of Mexican Ornithology. Three workshops (held on Tuesday) will help to introduce younger ornithologists to techniques in the business. We would like to thank the organizers of these workshops for offering their services. In terms of waterbirds, four symposia, nearly 90 oral, and 7 posters will be presented. Two plenary speakers will focus on the results on long-term population studies of watebirds. On Thursday, Francesca Cuthbert will share the newest information about Piping Plover trends in the North American Great Lakes, using the wealth of information collected about individual Piping Plovers in this most endangered population of the species. Then, on Friday, the Waterbird Society will present Dr. Peter Becker, the Robert Cushman Murphy Award for outstanding contributions in the field of waterbird biology award, who will illustrate the importance of lifelong individual development and its effects on fitness and population demography using the Common Tern as a model study species. We also are excited to have an informal plenary, in a more relaxed atmosphere, presented by Dr. David Shealer on his long-term research project. This will be held on Thursday evening. Three of the four waterbird-related symposia will focus on individual species or groups of species including Great Egret, Reddish Egret, Terns, Gulls, and Plovers. The last symposium will focus on the emerging area of research examining effects of irrigation practices on waterbird biology. In addition, seven oral and one poster waterbird session will be held. All sessions in this part of the program promise to include information that should yield important management and ecological implications. This year s conference will be attended by 76 presenting students, and by Ornithologists from Canada, the United States, Mexico, Cuba, Argentina, Brazil, Germany, the Czech Republic, China, and the United Arab Emirates. With such an international representation, we will all have the opportunity to meet and discuss exciting research ideas and new collaborations will surely arise. Needless to say, bird watching at La Paz should be great for those interested in both aquatic and terrestrial birds. Finally, we wish to give our deepest thanks to colleagues at La Paz for hosting all of us in spite of the damage and turmoil recently caused by Odile Hurracaine in Southern Baja California. Erica Nol and Leonardo Chapa-Vargas Co-Scientific Program Coordinators.

9 WELCOME FROM THE CHAIRS OF THE LOCAL ORGANIZING COMMITTEE Five years ago Felipe Chávez Ramírez and I were drinking a beer on the malecón of La Paz enjoying a good ceviche and discussing about different themes of our collaborations we had at the moment. Suddenly, after the third beer, we thought it could be a good idea to bring the Waterbird Society meeting to southern Baja California peninsula. A great number of aquatic bird species had been recorded and studied by a number of birdwatchers, ornithologists, ecologists, biologists in general in the peninsula. We submitted a proposal to the WBS and the council board decided to approve our proposal in the NAOC meeting in Vancouver in 202. At that time I was invited to give a talk in one of the CIPAMEX meetings and again talking with some friends in Mazatlán I asked them to think about making a joint meeting with WBS in La Paz. A great number of terrestrial birds even some endemics had been recorded and studied by ecologists, biologists and birdwatchers in the Baja California peninsula too. A proposal was submitted to the CIPAMEX council board and in 203 they approved the idea to have a joint meeting with WBS in La Paz on November 204. Great news for all! Now, we hope you will enjoy beautiful La Paz, capital of Baja California Sur, a place of amazing contrasts between the desert, sky, and sea. La Paz is in the extreme southern part of the Baja California peninsula. You could watch more than 50 aquatic and 80 terrestrial, resident and migratory bird species around the region during this time of the year. We hope you take advantage of the incredible birding trips. Daily and post-meeting field trips are really amazing for birding. We have planned these trips at the minimum cost for people attending the meeting. Besides, this 204 we at CIBNOR convinced CONACyT-México (Consejo Nacional de Ciencia y Tecnología) to provide funds to support Latin American ornithologists (mainly students, Mexican in particular) to attend this WBS-CIPAMEX joint meeting. Support was given to 73 people to attend the meeting, 45 awardees with full support. This is certainly an extraordinary support obtained by the CIBNOR local committee to help students to attend the meeting in order to exchange ideas and to learn from experienced researchers. We wanted to give this support so more students could come to La Paz to take advantage of an excellent opportunity to be part of the scientific Conference. Now, after being selected to receive the award many new students and some new researchers will be able to present their findings. Thus, we want to really thank CONACyT for the generous funds they have provided. CIBNOR has been host of several scientific meetings held in La Paz. Particularly, we have hosted two ornithologists meetings before, one Cooper Ornithological Society and one Raptor Research Foundation meetings. Thus, we have at CIBNOR an excellent staff especially built to follow up the logistics of the meetings. We want to express our gratitude to all the members of the Local Organizing Committee. Silvia Alzaga and her staff put many hours handling all conference rooms, food, and local registration arrangements, organized the materials, and put up with Chair. Claudia Pérez has also organized part of the materials and the edition of the program. Gerardo Hernández designed the poster of the meeting and made the program design. Eliseo Sánchez designed the logo and other graphics of the event. We also want to thank all the other people, staff and volunteers (too many to mention here, but especially Claudia Morales, Alma Sánchez, Lidia Nava and Jorge Collins) who have supported the local organizing committee with their efforts in various capacities. We are grateful to Susan Elbin, President of the Waterbird Society, and Fernando Villaseñor, President of CIPAMEX, for encouraging all of us chairs, scientific program coordinators, staff, to work in order to having a great meeting. Erica Nol and Leonardo Chapa have put together a great scientific program for you to take part in over these next few days. They made an excellent job, so we all have to thank them for this. Be certain that we deeply want all of you to have an excellent, very productive, and interesting meeting in academic terms with a dynamic exchange of ideas where many new opportunities for collaboration could rise. We also want you to enjoy the incredible and peaceful landscapes of the Baja California peninsula where a great number of beautiful aquatic and terrestrial birds use the wetlands, coast, mangroves, desert, mountains, and oases all year long or seasonally. We want to show you this incredible region that deserves our attention to establish especial conservation programs of birds and their habitats. Finally, we want you to feel good, happy to be here visiting La Paz and that you have the best personal experience during the days of your stay. I agree with John Steinbeck when he wrote in his Por el Mar de Cortés (The Log from the Sea of Cortez) book in 94: pensamos en lo buenos hombres que son la mayoría de los biólogos, tenores del mundo científico. temperamentales, caprichosos, libertinos, bebedores, de risa fuerte y saludables. We are all biologists, so maybe we are nice guys, we have to believe that. Enjoy the meeting, enjoy Baja California Sur, enjoy La Paz. Ricardo Rodríguez-Estrella Chair Local Committee Host (Anfitrión) Felipe Chávez-Ramírez Co-chair

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11 Biographies on Plenary Speakers F Dr. Katherine Renton Dr. Renton has been conducting field research on the ecology of parrots and macaws in tropical moist and dry forests in Central and South America since 987. She is currently a Scientific Researcher at the Chamela Biological Station, of the Universidad Nacional Autónoma de México, and acquired Mexican citizenship in Her research has focused on the ecology and reproductive strategies of psittacines, as well as other cavity-nesting birds, and she has been research advisor for 23 Mexican students. Dr. Renton has also worked closed with various Mexican governmental agencies to develop policies for the conservation and management of threatened psittacines in Mexico. She is a past President of the Sociedad para el Estudio y Conservación de las Aves en México (CIPAMEX), which is the largest ornithological society in Mexico, and is an Elective Member of the American Ornithologists Union. Resource requirements and limiting factors for parrots The ecological requirements of nest-sites, food, habitat, and area are among the least understood aspects of psittacine ecology. Most psittacines are secondary-cavity nesters and are constrained to use available cavities. We found that the Lilac-crowned Parrot exhibits adaptive nest-cavity selection that predicts nest success, suggesting that predation pressure may have influenced nest-site selection criteria. Parrots form a large biomass of canopy granivores in tropical forests, yet their ecological function is scarcely understood. Seeds form 82% of the diet of Lilac-crowned Parrots, while seeds of 3 tree species comprise 75% of the biomass of nestling diets. Lilac-crowned Parrots are important pre-dispersal seed predators causing 56% pre-dispersal seed loss for Astronium graveolens. Hence, the reduction of parrot Dra. Katherine Renton La Dra. Katherine Renton ha llevado a cabo investigaciones de campo acerca de la ecología de pericos y guacamayas en bosques tropicales húmedos de Centro y Sudamérica desde 987. En 2007 adquirió su ciudadanía mexicana, y actualmente es investigadora en la Estación Biológica de Chamela de la Universidad Nacional Autónoma de México. Sus investigaciones se han centrado en la ecología y las estrategias reproductivas de psitácidos y otras aves que anidan en cavidades, y ha dirigido a 23 estudiantes Mexicanos. La Dra. Renton ha trabajado de manera cercana con varias agencias del gobierno Mexicano para desarrollar políticas para la conservación y manejo de psitácidos amenazados en México. Además, fue la presidenta de la más grande sociedad ornitológica en México, la Sociedad para el Estudio y Conservación de las Aves en México (CIPAMEX), y es miembro electivo de la Unión de Ornitólogos de América, la American Ornithologists Union. Requerimientos de recursos y factores limitantes en loros Los requerimientos ecológicos de sitios de anidación, alimento, hábitat, y área son algunos de los aspectos menos estudiados de la ecología de psitácidos. La mayoría de estos organismos anidan en cavidades secundarias y están limitados al uso de cavidades disponibles. Nosotros encontramos que la selección adaptativa de cavidades de anidación por el loro corona lila presenta es un importante predictor de su éxito reproductivo, lo cual sugiere que la presión por depredación puede haber influido al criterio de selección de sitios de anidación. Los loros constituyen una gran biomasa de granívoros del dosel de bosques tropicales, sin embargo el entendimiento de sus funciones ecológicas es escaso. Las semillas forman el 82% de la dieta del loro corona lila, mientras que tres especies constituyen el 75% de la biomasa de la dieta de las crías en el nido. Los loros de corona lila son importantes depredadores

12 populations in tropical forests may have consequences for their functional role as seed predators, influencing recruitment patterns of canopy trees. Habitat and area requirements are poorly known yet parrots have the ability to fly long distances. The Lilac-crowned Parrot has a homerange of >8,000 ha, selectively foraging in semi-deciduous forest, and avoiding disturbed areas. Lilac-crowned Parrots also make long-distance seasonal altitudinal migrations of 44 km, and juveniles disperse >60 km from their natal area. This highlights the need to develop ecological connectivity to maintain functional ecosystems. Understanding these ecological requirements of parrots is essential to identify the characteristics making species vulnerable to human pressures. Other authors for Dr. Renton s presentation: Alejandro Salinas-Melgoza2, Miguel Ángel de Labra-Hernandez3, and Sylvia Margarita de la Parra-Martinez3 Affiliations: Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, AP 2, San Patricio-Melaque, Jalisco, Mexico 2Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala-CONACyT, Km..5. Carr. Fed. Tlaxcala-Puebla, Tlaxcala de Xicohténcatl, Tlaxcala, México. 3Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Mexico City, Mexico previos a la dispersión de semillas y causan el 56% de las pérdidas de semillas de Astronium graveolens previas a la dispersión. Por lo tanto, la reducción en las poblaciones de loros en bosques tropicales puede tener consecuencias para su papel funcional como depredadores de semillas, influyendo así los patrones de reclutamiento de árboles del dosel. Los requerimientos de hábitat y área son pobremente conocidos, pero los loros tienen la habilidad de volar grandes distancias. El loro de corona lila tiene un ámbito hogareño mayor a 8,000 ha, forrajea selectivamente en bosques semideciduos y evita áreas con disturbio. Esta especie también realiza migraciones estacionales de larga distancia de 44 km, y los juveniles se dispersan >60 km desde sus áreas natales, lo cual demuestra la necesidad de desarrollar conectividad ecológica para mantener ecosistemas funcionales. El entendimiento de estos requerimientos ecológicos de los loros es esencial para identificar las características que hacen a las especies vulnerables a las presiones humanas. Otros autores para la presentación de la Dra. Renton: Alejandro Salinas-Melgoza2, Miguel Ángel de Labra- Hernandez3, y Sylvia Margarita de la Parra-Martinez3. Afiliaciones: Estación de Biología Chamela, Instituto de Biología, Universidad Nacional Autónoma de México, AP 2, San Patricio-Melaque, Jalisco, México 2Centro Tlaxcala de Biología de la Conducta, Universidad Autónoma de Tlaxcala- CONACyT, Km..5. Carr. Fed. Tlaxcala-Puebla, Tlaxcala de Xicohténcatl, Tlaxcala, México. 3Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, México 2

13 Becker, Peter H. Award Recipient: Robert Cushman Award for Lifetime achievement in the study of waterbirds Institute of Avian Research Vogelwarte Helgoland Wilhelmshaven D Germany peter.becker@ifv-vogelwarte.de Peter H. Becker was born in Cologne, where he also had studied and finished the PhD. In 978 he moved to the Institute of Avian Research in Wilhelmshaven, Germany, where he is deputy director since 993. Aside in 997 he was appointed to a professor at the University of Oldenburg. His main research interest is in the field of seabird ecology (reproduction, life-history, demography and contamination). The species in focus is the Common Tern. He is engaged in long-term monitoring and developed methods to remotely and automatically collect huge amounts of individual-based data on manifold traits. Since 995 Peter is a member of the Waterbird Society which he invited last year to its 37th annual meeting in Wilhelmshaven Lifelong individual development as an important life history component in the Common Tern To date the significance of age-dependent change has been underestimated or even neglected, mainly because adequate data were lacking to address this topic. Nowadays, longterm longitudinal studies, innovative field and analytical techniques are providing the necessary data. Findings show that individual change over life is a ubiquitous phenomenon in long- and short-lived bird species: an adult bird is not invariable. Little is known, however, about the traits involved and the extent to which rates of individual change vary between individuals. Causes and consequences of such variation, too, need careful attention. I address lifelong developments in the Common Tern (Sterna hirundo) and Becker, Peter H. receptor del premio: Robert Cushman, premio para el logro de vida en el estudio de aves acuáticas Institute of Avian Research Vogelwarte Helgoland Wilhelmshaven D Germany peter.becker@ifv-vogelwarte.de Peter H. Becker estudio y concluyó su doctorado en Cologne, su ciudad natal. En 978 se mudó al Institute of Avian Research en Wilhelmshaven, Alemania, donde es director diputado desde 993. Adicionalmente, en 997 recibió el nombramiento de profesor en la Universidad de Oldenburg. Su principal interés de investigación es en el campo de la ecología de aves acuáticas (reproducción, historias de vida, demografía, y contaminación), y su especie de enfoque es la golondrina marina común. Él está involucrado en el monitoreo a largo plazo y los métodos desarrollados para recolectar grandes cantidades de datos a nivel de individuo sobre características múltiples. Desde 995, Peter es miembro de la Waterbird Society, para la cual invitó el año pasado a celebrar su 37va reunión anual en Wilhelmshaven. Desarrollo individual durante el tiempo completo de vida como un componente importante de la historia de vida en la golondrina marina común Hasta la fecha, el significado del cambio dependiente de la edad ha sido subestimado, o inclusive ignorado, principalmente debido a la falta de datos adecuados para abordar este tema. Actualmente, tanto los estudios longitudinales a largo plazo, como las técnicas de campo y analíticas innovadoras están proporcionando información necesaria para abordar este 3

14 their consequences for individuals and populations. Since 992 I have been studying a colony at the unique artificial site Banter See, Germany. Preconditions for obtaining repeated measurements of various traits within individuals were adequate methods of remote and automatic recording and high re-sighting rates. For physiological investigations a blood sampling method without capturing the incubating adults was developed. Based on an extensive individualbased data set, I show that age-dependent change at the population level comprises many traits of behaviour, timing of arrival and laying, body condition, physiology, reproduction and survival. Individual improvements throughout life were found to be the major mechanism behind this change whose effects at the population level are further enhanced by selection. Old individuals are shaped by ontogeny and selection and contribute most young to the next generation. The fitness benefits of breeding attempts late in life are only marginally narrowed by senescence. To understand the evolution of life histories, individual change, differences among individuals, selection, and their interactions have to be considered. Lifelong ontogeny itself turns out to be a significant life history characteristic affecting fitness and demography. tema. Los hallazgos muestran que los cambios individuales durante la vida constituyen un fenómeno universal en especies de aves de tiempos de vida cortos y largos: un ave adulta no se mantiene sin cambios. Sin embargo, se conoce poco acerca de los caracteres involucrados y hasta qué punto las tasas de cambio individual varían entre individuos, y las causas y consecuencias de esta variación también requieren atención cuidadosa. Yo abordo los desarrollos durante el tiempo de vida completo en la golondrina marina común (Sterna hirundo), y sus consecuencias para los individuos y poblaciones. Desde 992, he estudiado a una colonia en un sitio artificial particular, Banter See, en Alemania. Las condiciones existentes para poder obtener mediciones repetidas de varios atributos a nivel de individuos proporcionaron métodos que permitieron tomar registros de manera remota y automática, así como obtener altas tasas de reencuentro. Para las investigaciones fisiológicas, se ha desarrollado un método de muestreo de sangre que no requiere capturar a los adultos que se encuentran en la etapa de incubación. Con base en una extensa matriz de datos a nivel de individuos, muestro que el cambio dependiente de la edad a nivel de la población incluye muchos caracteres de comportamiento, tiempo de llegada y puesta de los huevos, condición corporal, fisiología, reproducción, y sobrevivencia. Las mejorías individuales a través de la vida mostraron ser el mecanismo más importante detrás de este cambio, cuyos efectos al nivel de la población son mejorados aún más por el proceso de selección. Los individuos viejos son moldeados por la ontogenia y la selección, y contribuyen al reclutamiento de la mayoría de los jóvenes para la siguiente generación. Los beneficios en adecuación de los intentos reproductivos tardíos en la vida son solamente disminuidos marginalmente por la senescencia. Para poder entender la evolución de las historias de vida, el cambio individual, las diferencias entre individuos, y sus interacciones deben ser considerados. La ontogenia a través de toda la vida resulta ser una característica de historia de vida significativa que afecta a la adecuación y a la demografía. 4

15 Dr. Francesca J. Cuthbert Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota Dr. Cuthbert received her PhD in Ecology at the University of Minnesota and is currently a Professor in the Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota-Twin Cities and a Scientific Investigator at the University of Michigan Biological Station. For the past 30 years her research has focused on three topics in avian biology and conservation: recovery of federal or state listed species (especially piping plovers); ecology and population dynamics of colonial nesting waterbirds; and ecology and management of abundant species (especially double-crested cormorants). Most of her research involves working closely with federal and state agency biologists to facilitate conservation and management. She has advised more than 40 MS and PhD students. Dr. Cuthbert is a past President of the Waterbird Society, Member of the Waterbird Conservation Council of the Americas and a Fellow in the American Ornithologists Union. On the Road to Recovery: the Endangered Great Lakes Piping Plover Population In 986, the population of Piping Plovers in the North American Great Lakes was listed as Endangered by the U.S. government; it was estimated at 2-7 breeding pairs. Over almost 30 years, an intensive recovery effort, spearheaded by the U.S. Fish and Wildlife Service, other federal, provincial and state agencies, non-profits, Dra. Francesca J. Cuthbert Department of Fisheries, Wildlife and Conservation Biology, University of Minnesota La Dra. Cuthbert recibió su doctorado en Ecología en la Universidad de Minnesota y actualmente es profesora en el Departamento de Pesquerías, Vida Silvestre, y Biología de la conservación en la Universidad de Minnesota, Minneapolis- St. Paul, e investigadora en la estación biológica de la Universidad de Michigan. Durante los últimos 30 años, su investigación se ha enfocado en tres temas en Biología y Conservación de Aves: recuperación de especies listadas a nivel federal o estatal (especialmente chorlitos chifladores); Ecología y dinámica poblacional de aves acuáticas de anidación colonial; y Ecología y manejo de especies abundantes (especialmente cormoranes de dos crestas). La mayor parte de su investigación involucra el trabajo cercano con biólogos de agencias estatales y federales para facilitar la conservación y el manejo. Ella ha asesorado a más de 40 estudiantes de maestría y doctorado, es la anterior presidenta de la Waterbird Society, miembro del Consejo de Conservación de Aves Acuáticas de las Américas, y pertenece a la American Ornithologists Union. En el camino hacia la recuperación: la población en peligro de chorlitos chifladores de los Grandes Lagos. En 986, la población de chorlitos chifladores en los grandes lagos de Norte América fue listada en la categoría de en peligro por el gobierno de los Estados Unidos, estimándose un total de entre 2-7 parejas reproductivas. Durante casi 30 años, se llevó a cabo un intenso esfuerzo de recuperación encabezado por el Servicio de Pesca y Vida Silvestre de los Estados Unidos, otras agencias federales, estatales, y de las provincias, organizaciones no lucrativas, universidades, 5

16 universities and private citizens, has increased the breeding population to 70 pairs and expanded its distribution beyond Michigan to include Wisconsin and Ontario. This presentation reviews the recovery process, including its successes and challenges, and identifies future efforts needed to delist this still vulnerable population. y la iniciativa privada. Este esfuerzo ha incrementado la población reproductora a 70 parejas y promovió la expansión de su distribución más allá de Míchigan para incluir a Wisconsin y Ontario. Esta presentación revisa el proceso de recuperación, incluyendo su éxito y retos, e identifica la necesidad de esfuerzos futuros para borrar de las listas a esta población que aún es vulnerable. 6

17 Dr. David Shealer Department of Biology, Loras College, Dubuque, Iowa (USA) Dr. Shealer is a behavioral ecologist and Associate Professor of Biology at Loras College in Dubuque, Iowa (USA). Dave received his PhD in Ecology and Evolution from Rutgers University, where he began his career studying the feeding ecology of tropical marine terns in Puerto Rico. He then migrated northward for post-doctoral research on Falkner Island, Connecticut, where he discovered that crime does indeed pay for kleptoparasitic Roseate Terns. When he landed a professorship in Iowa, Dave said adios to the ocean and donned chest waders to begin a long-term study of Black Terns in Wisconsin. Since 999, he and his students have banded nearly 4,000 birds in an effort to better understand population demographics and dynamics of this declining species. Along the way, he has investigated effects of disturbance, experimented with different management techniques, examined habitat selection and explored patterns of mate choice. Dave is a past President of the Waterbird Society, serves as Chair of the Nominating Committee, and is a Fellow in the American Ornithologists Union. The biology, psychology, economics, and politics of conducting a long-term research project. Nobody would dispute the intrinsic value of long-term research studies of long-lived birds, although studies of this type are relatively rare. Insights gained from longterm studies of waterbirds include lifespan, annual survival probability, age at recruitment into the breeding population, lifetime reproductive success, and senescence, to list just a few. In this plenary, I first review the work my students and I have conducted over the past 6 years on Black Terns Dr. David Shealer Department of Biology, Loras College, Dubuque, Iowa (USA) El Dr. Shealer es un Ecólogo del comportamiento y Profesor Asociado de Biología en Loras College en Dubuque, Iowa (EUA). Dave obtuvo su doctorado en Ecología y Evolución en la Universidad Rutgers, institución en la que inició su carrera estudiando la ecología alimentaria de golondrinas marinas en Puerto Rico. Posteriormente se mudó hacia el norte para realizar una estancia de investigación postdoctoral en la isla Falkner en Connecticut, lugar en el que descubrió que el comportamiento criminal en realidad no beneficia a las golondrinas marinas rosadas claptoparasíticas. Cuando David aterrizó en una posición de professor en Iowa, le dijo bye al mar y enfocó sus esfuerzos al estudio a largo plazo de las golondrinas marinas negras en Wisconsin. Desde 999, David y sus estudiantes han anillado 4,000 aves en un esfuerzo para incrementar el entendimiento sobre la demografía poblacional y la dinámica de esta especie en declive. Como parte de este trabajo, ha estudiado los efectos del disturbio, ha experimentado con diferentes técnicas de manejo, y ha examinado la selección de hábitat y explorado los patrones de selección de pareja. Dave fue presidente de la Waterbird Society, provee sus servicios en el comité de nominaciones, y es miembro de la American Ornithologists Union. La Biología, Psicología, Economía, y Política de llevar a cabo un proyecto de investigación a largo plazo. A pesar de que nadie discutiría en contra del valor intrínseco de los estudios a largo plazo de aves de historias de vida largas, los estudios de esta naturaleza son relativamente raros. Los hallazgos obtenidos de estudios sobre aves acuáticas a largo plazo incluyen tiempos de vida, probabilidades anuales 7

18 (Chlidonias niger) at several colony sites in Wisconsin (USA). This body of work consists of three main areas of focus: population demographics, conservation/management efforts, and behavioral ecology. Somewhat paradoxically, it seems that the more I learn about this species, the less I understand it, and I hope to explore some of these mysteries with you during the presentation. The second part of the plenary will consist of an informal discussion about some of the side issues that arise inevitably during a long-term study, such as maintaining sources of funding, dealing with government agencies (e.g., the permitting process), deciding when enough (data) is enough already to publish, and finally, deciding when to call it quits. de supervivencia, edad de reclutamiento a la población reproductora, éxito reproductivo durante el tiempo de vida, y senescencia, entre otros. Durante esta plenaria, primero revisaré el trabajo que mis estudiantes y yo hemos llevado a cabo sobre las golondrinas marinas negras (Chlidonias niger) durante los últimos 6 años en varios sitios coloniales en Wisconsin (EUA). El trabajo acumulado consiste de tres áreas principales de enfoque: demografía de poblaciones, esfuerzos de manejo y conservación, y Ecología del comportamiento. Es relativamente paradójico que parece que entre más aprendo acerca de esta especie, monos la entiendo, y tengo la esperanza de explorar algunos de estos misterios con ustedes durante la presentación. La segunda parte de la plenaria consistirá de una discusión informal acerca de retos adicionales que inevitablemente uno encuentra durante el curso de un estudio a largo plazo, tales como mantener las fuentes de financiamiento, lidiar con las agencias de gobierno (ej. el proceso de gestión de permisos), decidir hasta qué punto es suficiente (en términos de datos) para publicar, y finalmente, cuando concluir. 8

19 General Program / Programa General TUESDAY, NOVEMBER 4. WORKSHOPS, COURSES AND MEETINGS 6:00-8:30 Registration. Lobby Hotel Perla. 6:00-8:30 Reception of presentations. Lobby Hotel Perla. 8:00-7:00 Waterbird Society Council meeting. Room Salón Madre Perla. CIPAMEX Society. Room Ejecutivo. 9:00-7:00 Workshops. El Mechudo, Room Madre Perla. 0:00-4:00 Courses. Centro Cultural La Paz. 9:00-22:00 Social hour/mixer. Restaurant Stella. WEDNESDAY, NOVEMBER 5 :20-2:20 Registration. Room Sala Madre Perla. 7:00-8:00 Registration. Room Sala Madre Perla. 09:30-0:30 Reception of presentations. Room Sala Madre Perla. 7:00-8:00 Reception of presentations. Room Sala Madre Perla. 2:20- Lunch. Restaurant Hotel Perla / Restaurant Bismarkcito. 08:5-08:35 Welcome, Announcements and Introductions. Teatro Juárez. 08:35-09:30 Plenary Session. Dr. Katherine Renton. Resource requirements and limiting factors for parrots. Teatro Juárez. 0:00-2:00 Symposium Águila Real en México. Centro Cultural La Paz. 3:30-6:30 Bird conservation in the neotropics. Centro Cultural La Paz. 0:00-2:00 Effects of irrigation on waterbirds. Room Mechudo. 3:30-6:30 Shorebird conservation. Room Mechudo. 0:00-2:00 Energy, pollution and waterbirds. Room Salón Madre Perla. 3:30-6:30 Avian ecology. Room Salón Madre Perla. 8:30-2:30 Poster Session. Centro Cultural La Paz. THURSDAY, NOVEMBER 6 :20-2:20 Registration. Room Sala Madre Perla 7:00-8:00 Registration. Room Sala Madre Perla 09:30-0:30 Reception of presentations. Room Sala Madre Perla. 7:00-8:00 Reception of presentations. Sala Madre Perla. 2:20- Lunch. Restaurant Hotel Perla / Restaurant Bismarkcito 08:30-09:30 Plenary Session. Francesca Cuthbert. On the road to recovery: Piping plovers in the North American great lakes. Teatro Juárez. 0:00-:40 Snowy Plovers, Least Terns, and Gull-billed Terns: shared status, threats and conservation needs across North America. Centro Cultural La Paz. 3:30-5:0 Changes in waterbird numbers. Centro Cultural La Paz. 5:50-6:50 Genetic tools. Centro Cultural La Paz. 0:00-:40 Bird conservation in the neotropics. Room Mechudo. 3:30-5:0 Bird conservation in the neotropics. Room Mechudo. 5:50-6:50 Waterbird behavior. Room Mechudo. 0:00-0:20 Towards broader approaches to waterbird conservation. Room Salón Madre Perla. 0:40-:40 Charadrius plover conservation. Room Salón Madre Perla. 9

20 3:30-6:50 Charadrius plover conservation. Room Salón Madre Perla. 8:00-9:00 Special Informal Plenary. Dr. David Shealer, The biology, psychology, economics, and politics of conducting a long-term research project. Room Salón Madre Perla. FRIDAY, NOVEMBER 7 :20-2:20 Registration. Room Sala Madre Perla. 7:00-8:00 Registration. Room Sala Madre Perla. 09:30-0:30 Reception of presentations. Room Sala Madre Perla. 2:20- Lunch. Restaurant Bismarkcito. 08:30-09:30 Plenary Session. Dr. Peter Becker. Lifelong individual development as an important life history component in the Common Tern. Teatro Juárez. 0:00-2:00 Great Egret Symposium. Centro Cultural La Paz. 3:30-6:0 Symposium: Ecology and Conservation of Reddish Egrets-Reddish Egret. Centro Cultural La Paz. 0:00-:40 Seabird conservation. Room Mechudo. 3:30-5:0 Waterbird conservation. Room Mechudo. 0:00-2:20 Miscellaneous. Room Salón Madre Perla. 3:30-5:50 Miscellaneous. Room Salón Madre Perla. 6:30- Annual General Meeting: Waterbirds Society. Room Salón Madre Perla. 6:30- Annual General Meeting: CIPAMEX. Social Events / Eventos Sociales TUESDAY, NOVEMBER 4. 9:00-22:00 Social hour/mixer. Restaurant Stella. kilometer from Hotel Perla, approximately minutes walk. WEDNESDAY, NOVEMBER 5 06:30-07:30 Morning Tai Chi 8:30-2:30 Poster Session. Centro Cultural La Paz. THURSDAY, NOVEMBER 6 06:30-07:30 Morning Tai Chi 9:00-23:00 Evening wine and beer on the beach. In front of the Hotel Perla. FRIDAY, NOVEMBER 7 06:30-07:30 Morning Tai Chi 9:00-23:00 Banquet. Hotel Grand Plaza 20