Strand-feeding by coastal bottlenose dolphins (Tursiops truncatus) in the Gulf of Guayaquil, Ecuador

Authors

  • Pedro Jose Jiménez Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM)
  • Juan José Alava School of Resource & Environmental Management (Environmental Toxicology Research Group) Faculty of Environment, Simon Fraser University Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM), Guayaquil, Ecuador

DOI:

https://doi.org/10.5597/lajam00191

Keywords:

Feeding Ecology, Behavioral Ecology, Habitat Use

Abstract

Strand-feeding as a predatory strategy was first observed in bottlenose dolphins, Tursiops truncatus, inhabiting waters of Spartina marshes of South Carolina and Georgia, United States. While a substantial body of documented observations exists for many regions of the world, current evidences and photo-documentation of these types of foraging behaviors by bottlenose dolphins in the Pacific coast of South America are scarce. To the best of our knowledge, behaviors resembling strand-feeding by bottlenose dolphins have been described very briefly without supporting photos in the inner estuary of the Gulf of Guayaquil. As a part of a long-term field study (2001-2011) on photo-identification, population ecology and monitoring of the bottlenose dolphin in the El Morro Mangrove and Wildlife Refuge, we provide some insights on its conservation, and photo-documented the occurrence of strand-feeding as a recurrent behavioral foraging tactic in this region of South America.

Author Biographies

Pedro Jose Jiménez, Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM)

Biologo Pedro J. Jiménez V.
Director FEMM Filial Playas
Especialista en Mamíferos marinos y Manejo de Áreas Protegidas
Consultor en Proyectos Ambientales y turísticos - EIA
Instructor - Guía Turístico

Juan José Alava, School of Resource & Environmental Management (Environmental Toxicology Research Group) Faculty of Environment, Simon Fraser University Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM), Guayaquil, Ecuador

Juan Jose Alava is a Biologist who graduated from the Universidad de Guayaquil, Ecuador, in 1996. In the 1990s, during his undergraduate studies, he got deeply involved with research and conservation of marine mammals, Neotropical birds, sea turtles, mangrove forests as well as the identification of tropical parasites. During the mid-1990s, he started working as a Microbiology Research Assistant at the National Institute of Hygiene and Tropical Medicine of Ecuador and as a Wildlife Biologist specialized in environmental impact assessments at the Center of Environmental Studies (CEMA, Centro de Estudios de Medio Ambiente de la ESPOL, Guayaquil, Ecuador) for several years (1995–2002). He was also an instructor of zoology and ecological projects at the undergraduate level at the Escuela de Ecoturismo, Universidad Cristiana Latino Americana, Ecuador. He received his Master degree (Master of Earth and Environmental Resource Management), under a Fulbright Scholarship, from the School of Ocean, Earth, and Environment, College of Art and Sciences, University of South Carolina,Columbia USA. He received the Ph.D. degree (specialized in environmental toxicology/eco-toxicology) from the School of Resource and Environmental Management (REM School), Faculty of Environment, Simon Fraser University, British Columbia, Canada, in 2011. His Ph.D. dissertation was focused on ecotoxicology regarding the baseline levels, biomagnification, and health effects of persistent organic pollutants (POPs, including DDTs) in endangered Galapagos sea lion pups of the Galapagos Islands and food web bioaccumulation modeling of PCBs in threatened marine mammals (killer whales, Steller sea lions) from British Columbia. He has served as an instructor for Global Changes, Applied Ecology and Sustainable Environments at REM School (SFU), and as a Collaborating Scientist of the Charles Darwin Foundation for the Galapagos Islands. Currently, he is providing temporal services as a research associate with the Institute of Ocean Sciences (IOS), Department of Fisheries and Ocean, Canada (DFO). His current fields of expertise include environmental toxicology and pollution; sea turtles and marine mammals’ eco-toxicology; tropical biodiversity and ecology, population dynamics and conservation of marine mammals, birds and sea turtles; field ornithology; parasitology and tropical environmental medicine; aquatic microbiology; fishery science and management; eco-toxicological risk assessment; and environmental impact assessments.

List of Refereed Publications (Peer Reviewed)

Alava, J.J., Lambourn, D.; Olesiuk, P.; Lance, M.; Jeffries,S.; Gobas, F.A.P.C.; Ross, P. S. 2012. PBDEs and PCBs in migrating Steller sea lions (Eumatopias jubatus) in the Strait of Georgia, British Columbia, Canada. Chemosphere. In press.

 

Páez-Rosas, D., David Aurioles-Gamboa, D., Alava, J.J., Palacios, D.M. 2012. Stable isotopes indicate differing foraging strategies in two sympatric otariids of the Galapagos Islands. Journal of Experimental Marine Biology and Ecology. In press.

 

Alava, J.J., Barragan, M.J., Denkinger, J. 2012. Assessing the impact of bycatch on Ecuadorian humpback whale breeding stock: a Review with Management Recommendations. Ocean and Coastal Management 57: 34-43

 

Alava, J.J., Keller, J.M., Wyneken, J., Crowder, L., Scott, G.I. Kucklick, J.R. 2011. Geographical variation of Persistent Organic Pollutants in eggs of threatened loggerhead sea turtles (Caretta caretta) from Southeastern USA. Environmental Toxicology and Chemistry 30: 1677-1688

 

Alava, J.J.; Ross, P. S.; Ikonomou, M. G., Cruz, M., Jimenez-Uzcategui, G., Salazar, S., Costa, D. P., Villegas-Amtmann, S., Howorth, P., Gobas, F.A.P.C. 2011. DDT in endangered Galapagos Sea Lions (Zalophus wollebaeki). Marine Pollution Bulletin 62: 660-671

 

Alava, JJ, M. Saavedra, X. Arosemena, M. Calle, C. Vinueza, R. Carvajal and  F. H. Vargas. 2011. Distributional records and potential threats to the Common (Mangrove) Black Hawk Buteogallus anthracinus subtilis insouthwestern Ecuador. Boletín de la Sociedad Antioqueña de Ornitología (Boletin SAO). 20(2) :18-28.

 

Alava, J.J.; Salazar, S., Cruz, M., Jimenez-Uzcategui, G., Villegas-Amtmann, S., Paez-Rosas, D., Costa, D. P., Ross, P. S.; Ikonomou, M. G., Gobas, F.A.P.C. 2011. DDT Strikes Back: Galapagos Sea Lions Face Increasing Health Risks. Ambio 40:425-430

 

Alava, J.J.; Ikonomou, M. G., Ross, P. S.; Costa, D. P., Salazar, S., Aurioles-Gamboa, D., Gobas, F.A.P.C. 2009. Polychlorinated biphenyls and polybrominated diphenyl ethers in Galapagos sea lions (Zalophus wollebaeki).  Environmental Toxicology and Chemistry 28 (11): 2271-2282

Alava, J.J. 2009. Carbon productivity and flux in the marine ecosystems of the Galapagos Marine Reserve based on cetacean abundances and trophic indices. Revista de Biología Marina y Oceanografía 44(1):109-122.

 

Alava, J.J., Merlen, G. 2009. Video-Documentation of a Killer Whale (Orcinus orca) predatory attack on a Giant Manta (Manta birostris) in the Galapagos Islands. Latin American Journal of Aquatic Mammals 7(1-2): 81-84.

 

Alava, JJ,M. Costantino, E. Astudillo, X. Arosemena, and M. Peñafiel. 2009. Population, seasonality and conservation threats of the Horned Screamer (Anhima cornuta) in Southwestern Ecuador. Waterbirds 32(1):81-86.

Jimenez, P. & Alava, J.J. 2009. Infección natural por Gnathostoma. (Nematoda: Spirurida, Gnathostomatoidea) en el pez dulceacuícola Hoplias microlepis: Correlación con la talla del pez, potenciales hospederos e implicaciones para salud publica en el occidente de Ecuador [Gnathostoma (Spirurida: Gnathostomatidae) infection in Hoplias microlepis: Prevalence, correlations with fish size, hosts, and public health implications Ecuador]. Biomedica 29(4): 591-603

Dominguez, G. and Alava, JJ. 2009. Observing External Clinical Signs of the Idiopathic Myonecrosis (IMN) during Production of Pacific White Shrimp (Litopenaeus vannamei) in Brazil. World Aquaculture 40(1): 12-15.

 

Jacquet, J., J. J. Alava, P., Ganapathiraju, S., Henderson, D., Zeller. 2008. In hot soup: sharks captured in Ecuador’s waters. Environmental Sciences 5(4): 269-283.

Alava, J. J. 2008. Loggerhead sea turtles (Caretta caretta) in marine waters off Ecuador: Occurrence, distribution and bycatch from the Eastern Pacific Ocean. Marine Turtle Newsletter 119:8-11.

 

Alava, J.J., P. Pritchard, J. Wyneken and H. Valverde. 2007. First documented record of nesting by the Olive ridley turtle (Lepidochelys olivacea) in Ecuador. Chelonian Conservation and Biology 6(2):282-285.

Carvajal R. and Alava J.J. 2007.Mangrove Wetlands Conservation Project and the Shrimp Farming Industry in Ecuador: Lessons Learned. World Aquaculture 38(3):14-17,69

Alava, J.J., Arosemena, X. Astudillo, E., Costantino, M. Peñafiel, Mand Bohorquez, C. 2007. Occurrence, abundance, and notes on some threatened Ecuadorian birds observed in the El Canclon Lagoon, Manglares Churute Ecological Reserve. Ornitologia Neotropical 18:223–232.

Alava, J.J., Arosemena, X and Angel, R. 2007. Brown Wood-rail Aramides wolfi at El Canclon Lagoon, Manglares-Churute Ecological Reserve, Ecuador. Cotinga 27:81-82.

Alava, J.J., Keller, J.M., Kucklick, J.R., Wyneken, J., Crowder, L., Scott, G.I. 2006. Loggerhead sea turtle (Caretta caretta) egg yolk concentrations of persistent organic pollutants and lipid increase during the last stage of embryonic development.  Science of the Total Environment 367:170–181.

 

Keller, J., Alava, J.J., Aleksa, K., Young, B., Kucklick, J.R., 2005. Spatial trends of polybrominated diphenyl ethers (PBDEs) in loggerhead sea turtle eggs and plasma. Organohalogen Compounds 67: 610–611 .

Alava, J.J. and Carvajal R. 2005. First records of elephant seals on the Guayaquil Gulf, Ecuador: On the occurrence of either a Mirounga leonina or M. angustirostris. Latin American Journal of Aquatic Mammals 4(2):195–198

Carvajal, R., M. Savedra, and J.J. Alava. 2005. Ecología poblacional, distribución y estudio de hábitat de Crocodylus acutus en la Reserva de Producción de Fauna Manglares, El Salado del Estuario del golfo de Guayaquil, Ecuador (Population ecology, distribution and habitat assessment of Crocodylus acutus (Cuvier 1807) in the “Reserva de producción de fauna manglares El Salado” of the Guayaquil Gulf Estuary, Ecuador). Revista de Biología Marina y Oceanografía 40(2):141–151.

 

Alava J.J., M.J. Barragan, C. Castro and R. Carvajal. 2005. A note on strandings and entanglements of humpback whales (Megaptera novaeangliae) in Ecuador. Journal of Cetacean Research and Management 7(2):163–168.

 

Alava, J.J. 2005. Censo, distribución y estado de conservación de la Garza pico de espatula (Ajaia ajaja) en el Estuario del Golfo de Guayaquil, Ecuador (Census, distribution and conservation status of Roseate Spoonbill (Ajaia ajaja) in the Guayaquil Gulf Estuary, Ecuador). Ornitologia Neotropical 16:175–185.

 

Alava, J.J. 2005. Inland Shrimp Aquaculture and Environmental Impact Assessment in Ecuador. World Aquaculture 36(3): 54-58.

 

Alava, J.J. and Aguirre, W. 2005. Scanning electron microscopy of Neoechinorhynchus sp. (Acanthocephala: Neoechinorhynchidae), a possible new species of intestinal parasite of the Tallfin croaker Micropogonias altipinnis (Günther, 1864). Parasitología Latinoamericana 60:48–53.

Alava J.J., P. Jiménez, M. Peñafiel, W. Aguirre, P. Amador.2005. Sea turtle strandings and mortality in Ecuador: 1994-1999. Marine Turtle Newsletter 108:4–7

 

Carvajal R. and Alava J.J.2005. American crocodiles still remain in mangroves of the Guayaquil Gulf, Ecuador. Crocodile Specialist Group Newsletter 24(3):6–7.

 

Alava, J.J. and Carvajal, R.2004. Ocurrencia de Noctilio  leporinus (Chiroptera:Noctilionidae) en la zona urbana y alrededores de  Guayaquil, Ecuador (Occurrence of Noctilio leporinus (Chiroptera:Noctilionidae) in the urban zone and the neigborhood of Guayaquil, Ecuador).Chiroptera Neotropical 10(1-2):183-187.

Alava J.J.,  R. Caravajal and J. Baquerizo. 2003.C. acutus in the Gulf of Guayaquil Bioregion: Current status and census of captive individuals. Crocodile Specialist Group Newsletter 22(4):15–16

Peer Reviewed Chapters in Books and Proceedings

 

Alava, JJ. and Gobas, F.A.P.C. 2012 (in press). Assessing the Biomagnification and Trophic Transport of Persistent Organic Pollutants in a food chain of the Galapagos sea lion (Zalophus wollebaeki): Conservation and Management Implications. In: Romero, A. and Keith, E. O. (Eds.), Marine Mammals. ISBN 979-953-307-948-5, InTech, Available from: http://www.intechopen.com/booksprocess/aboutthebook/chapter/84548/book/2363

Alava, J.J. and Haase, B. 2011. Waterbird Biodiversity and Conservation Threats in Coastal Ecuador and the Galapagos Islands. 271-314 In: Grillo, O. and Venora, G. (Eds.), Ecosystems Biodiversity. ISBN: 978-953-307-417-7, InTech,  Available from: http://www.intechopen.com/articles/show/title/waterbird-biodiversity-and-conservation-threats-in-coastal-ecuador-and-the-galapagos-islands

 

Alava, J.J. and Salazar, S. 2006. Status and conservation of Otariids in Ecuador and the Galapagos Islands. 495– 519 In: Trites, A.W., S.K. Atkinson, D.P. DeMaster, L.W. Fritz, T.S. Gelatt, L.D. Rea, and K.M. Wynne (Eds.). Sea lions of the world. Alaska Sea Grant College Program, University of Alaska Fairbanks.664 pp.

 

 

Articles published in Spanish (Peer Reviewed) at the national level

Jiménez P., S. Torres; J. J Alava; J. Samaniego. 2011. Inventario, Abundancia y Distribución Espacial de Mamíferos Marinos y Aves en las Islas Galápagos Durante el Crucero Oceanográfico (BAE Orión) en abril 2009. Implicaciones para Conservación. Acta Oceanográfica del Pacifico 16 (1):75-94.

Dominguez, G., U. Paredes and J.J. Alava. 2008. Identificacion de signos patologicos externos de la Necrosis Infecciosa Muscular (NIM) durante el cultivo de camron blanco (Litopenaeus vannamei) en Brasil. Aquacultura 70: 32-37

Carvajal, R. and Alava, J. J. 2008. El proyecto de conservación de humedales de manglar y la industria camaronera en el Ecuador: Lecciones aprendidas. Aquacultura 66:41-44.

 

Alava, J.J. 2002. Registros y abundancia relativa de mamíferos marinos durante el crucero oceanográfico insular  B/ I ORION  (CO-II-2000) en las Islas Galápagos y sus alrededores (Marine mammals abundance recorded during an oceanographic cruise around Galápagos Islands, Ecuador). Acta Oceanográfica del Pacifico 11(1):165-172.

 

Alava  J.J., J.J. Alava P. and G. Alava N. 2001. Mortalidad de chames, Dormitator latifrons, (Richardson, 1844) en estanques de cultivo (Mortality of Western sleepers, Dormitator latifrons, (Richardson, 1844)  in fish culture ponds). Acuacultura del Ecuador 44:53–60.

 

Alava, J.J.1994. Varamiento de una ballena picuda de Cuvier en Crucita, Manabí. Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM), El Observador Informativo 6(3):4. (Ziphius cavirostris).

 

Alava, J.J.1992. El Manatí Amazónico. Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM), El Observador Informativo 4(6):3. (Trichechus inungis).

 

Articles under review/revision, & in preparation (in English and Spanish).

Alava, J.J., Ross, P.S., Lachmuth, C.L., Ford, J.K.B., Ellis, G.M., Gobas, F.A.P.C. A Habitat Area-based PCB Food Web Bioaccumulation Model to Protect Endangered Killer Whales (Orcinus orca). In preparation (To be submitted to Environmental Science and Technology).

Alava, J.J. and Carvajal, R. in press. Cocodrilo de la Costa(Crocodylus acutus). En: Libro Rojo de Reptiles del Ecuador. Fundación Novum Milenium, UICN-Sur, UICN-Comité Ecuatoriano, Ministerio de Educación y Cultura, Quito, Ecuador. (Sometido para publicación)

Technical Reports/Documents & Other Scholar contributions

 

 

 

Alava J.J. 2012. Modelling the Bioaccumulation of Polybrominated Diphenyl Ethers (PBDEs) in the Food Web of Resident Killer Whales from the Strait of Georgia, British Columbia, Canada. Technical Report for the Institute of Ocean Sciences (IOS), Fisheries and Ocean Canada (DFO). March 2012. British Columbia, Canada. ii + 74p.

Lachmuth, C.L., Alava, J.J., Hickie, B.E., Johannessen, S.C., Macdonald, R.W., Ford, J.K.B., Ellis, G.M., Gobas, F.A.P.C., Ross, P.S. 2010. Ocean Disposal in Resident Killer Whale (Orcinus orca) Critical Habitat: Science in Support of Risk Management. DFO Can. Sci. Advis. Sec. Res. Doc. 2010/nnn. iv + 165 p.

 

Alava, JJ; Gobas F. A. P. C., Olmedo, J. and M. Riofrio-Briceño, M. 2009. Proyecto para el Estudio de Contaminantes Orgánicos Persistentes (COPs) y Mercurio en la red trófica de la Antártida. Documento de Información para la Reunión Consultiva del Tratado Antártico (Antarctic Treaty Consultative Meeting, 6-17 Abril 2009, Baltimore, Maryland, USA). Instituto Antártico Ecuatoriano (INAE)-Simon Fraser University (SFU). Guayaquil, Ecuador. 7p.

 

Alava, J.J. and Félix. 2006. Logistic population curves and vital rates of the Southeastern Pacific humpback whale stock. Paper submitted to the International Whaling Commission Workshop on Comprehensive Assessment of Southern Hemisphere Humpback Whales (SC/A06/HW1). Hobart, Tasmania, 3-7 April 2006.

Félix, F., C. Castro, B. Haase, P. Forestell, J. J. Alava and M. Scheidat. 2006 Estimates of the  Southeastern Pacific Humpback whale stock with Mark-Recapture models in Ecuador. Paper submitted to the International Whaling Commission Workshop on Comprehensive Assessment of Southern Hemisphere Humpback Whales (SC/A06/HW13). Hobart, Tasmania, 3-7 April 2006.

Keller, J.M., and Alava, J.J., 2005. PCBs, pesticides, and PBDEs in loggerhead sea turtle egg yolk samples from three geographic regions. Report of Analysis–ROA 839.02-05-323. U.S.Department of Commerce, National Institute of Standards and Technology, Chemical Science and Technology Laboratory, Analytical Chemistry Division. Gaithersburg, MD..

Keller, J.M., Alava, J.J., and Kucklick, J.R. 2005. Development of methods to measure polychlorinated biphenyls (PCBs) and organochlorine pesticides in loggerhead sea turtle egg yolk samples. Report of Analysis–ROA 839.02-05-308.U.S.Department of Commerce, National Institute of Standards and Technology, Chemical Science and Technology Laboratory, Analytical Chemistry Division. Gaithersburg, MD.

Alava J.J., M. Constantino, E. Astudillo and X. Arosemena. 2002. Estudio de la Población del Canclon (Anhima cornuta) y su hábitat en la Reserva Ecológica Manglares Churute. Ecuador. PPD-PNUD/Fundación Natura Capitulo Guayaquil-REMCH-Ministerio del Ambiente/Club Observadores de Aves, Guayaquil, Ecuador. 40 pp.

 

Alava, J.J. 2000. Las tortugas marinas en El Ecuador. In: Amorocho, D.,F. Campo, J.A. Riascos & E. Parra. (Eds.). Memorias del Curso Taller en Biología y Conservación de las Tortugas Marinas y III Seminario Internacional de la Red Colombiana para la Conservación de las Tortugas Marinas. RETOMAR, Asociación WIDECAST-Colombia.pp. 14-17.

 

Alava, J.J. 2000. Estado actual de conservación de las tortugas marinas en El Ecuador In: Amorocho, D., F. Campo, J.A. Riascos & E. Parra. (Eds.). 2000. Memorias del Curso Taller en Biología y Conservación de las Tortugas Marinas y III Seminario Internacional de la Red Colombiana para la Conservación de las Tortugas Marinas. RETOMAR, Asociación WIDECAST-Colombia. pp. 51-58.

Alava, J. J. and Calle, J. 2000. Estudio de Impacto Ambiental para el Proyecto Pasarela de Madera en Zona de Manglar y Vegtacion  Seca en el Area del Parque Nacional Galapagos, Santa Cruz. Informe Tecnico. (Environmental Impact Assessment of a Wood Boardwalk in Mangrove Zone and Dry Vegetation of an Area of the Galapagos National Park, Galapagos, Santa Cruz. Technical Report) Fundacion Natura Capitulo Guayaquil, Estacion Cientifica Carles Darwin (ECCD) and Parque Nacional Galapagos (PNG). 74p.

Carvajal, R. Alava, J.J. and Barba, R. 1999.  Proyecto “Control y Vigilancia a la tala de Manglar en la Costa Continental Ecuatoriana”. Informe Semestral Interno para la Camara Nacinal de Acuacultura (Control and Surveillance Systems to the Mangrove Ecosystem on the continental Ecuadorian coast". Interin Semestral Report to the Aquaculture National Chamber). Fundacion Natura Capitulo Guayaquil. 9 Noviembre 1998- 30 Abril 1999.

Papers/Abstracts presented in Conferences, Meetings, Workshops (including travel grants)

Gobas, F.A.P.C., Arblaster, J., Alava, J.J. 2012. Towards Ecosystem Based Sediment Quality Criteria. Abstracts, 21Annual Meeting Pacific Northwest Chapter (PNW)-Society of Environmental Toxicology and Chemistry (SETAC), Vancouver, BC, Canada, April 26-28, 2012. pp. 35.

Alava, J.J. 2011. Modeling the Bioaccumulation of DDT in the Galapagos sea lion food web: Conservation Implications. 19th Biennial Conference on the Biology of Marine Mammals. Cumulative effects of threats to marine mammals: Challenges to animals, scientists, and managers. 27 November-2 December, 2011. Tampa, Florida, USA. (Paper accepted for oral presentation).

Alava, J.J., Gobas, F.A.P.C. 2011. Modeling the Bioaccumulation Potential of Cesium 137 in a Marine Food Web of the Northwest Pacific, Canada. SETAC North America 32nd Annual Meeting, Navigating environmental challenges: Historical lessons guiding future directions. Hynes Convention Center, 13-17 November, 2011. Boston, Massachusetts, USA. (Paper accepted for oral presentation).

Haase, B., Alava, J.J. 2011. Chewing lice (Phthiraptera: Menoponidae) collected from Pacific shorebirds in Ecaudor. , pp. 73-74. In Abstracts of the Fourth Western Hemisphere Shorebird Group Meeting, 11- 15 August 2011, Simon Fraser University, Burnaby, BC, Canada.

Alava, J.J., S., Salazar, G. Jiménez-Uzcategui, M. Cruz, D. Páez-Rosas, P. Calle, J. Dekinger, P. S. Ross, M. Ikonomou y F. Gobas. 2010. Biomagnificación de Contaminantes Orgánicos Persistentes (COPs) en el Lobo Marino de Galápagos (Zalophus wolleabeki): Implicaciones para la conservación de la Biodiversidad Marina. 1er Simposio Latinoamericano de Biodiversidad Marina y Costera de Latinoamérica y El Caribe, y 2do Simposio Ecuatoriano de Biodiversidad Marino Costera. Ministerio del Ambiente, Ecuador; Grupo de Trabajo sobre Biodiversidad Marino y Costera del Ecuador. 9-12 Diciembre, 2010, Manta, Ecuador.

Alava, J.J. 2010. Stable isotopes and Galapagos pinnipeds. 18th Annual B.C. Marine Mammal Symposium. November 27, 2010, University of British Columbia, Aquatic Ecosystems Research Laboratory, Vancouver, BC, Canada

Alava, J.J, Ross, P. S., Ikonomou M., and F. A.P.C. Gobas. 2010. Trophic biomagnification of DDT and PCBs in the Galapagos sea lion food chain. SETAC North America 31st Annual Meeting, Bridging Science With Communities. Oregon Convention Center, 07 - 11 November 2010.Portland, Oregon, USA.

Alava, J.J., Ross P. S., Lachmuth, C., Ford, J. K. and Gobas F. A.P.C. 2010. A food web bioaccumulation model for PCBs in resident killer whales of the Northeastern Pacific. SETAC North America 31st Annual Meeting, Bridging Science With Communities. Oregon Convention Center, 07 - 11 November 2010. Portland, Oregon, USA.

Alava, J.J, Jiménez P., S. Torres. 2010. At sea distribution and abundance of seabirds around the Galapagos Islands-Ecuador: Conservation implications. In Abstracts, 1st World Seabird Conference: Seabirds: Linking the Global Oceans. Victoria, Canada,  September 7-11, 2010. pp. 36─37.

Alava, J.J., C. Lachmuth, P. S. Ross, and F. A.P.C. Gobas. 2010. Modeling PCB bioaccumulation in Chinook salmon (Oncorhynchus tshawytscha) from British Columbia, Canada: Health risk implications for top predators. In Abstracts 2010 Ecological and Evolutionary Ethology of Fishes Biennial Conference, May 16 - 20, 2010. Simon Fraser University, Burnaby-Vancouver, BC Canada. p. 2. [Travel Grant was provided by the Senate Graduate Awards Adjudication Committee, Dean of Graduate Studies, Simon Fraser University]

Ross, P. Lachmuth, C., Alava, J.J., Gobas, F.,  Hickie, B., Johannessen, S., Ford, J.  and Macdonald, R.. 2010. Assessing risks associated with disposal at sea within resident killer whale habitat: Science in support of SARA protections. Workshop on Persistent Contaminants, Sediments, and Killer whale health: Improving our Approaches to Science-based Risk Management. In Proceedings of the Centre for Science Advice, Pacific Region Review of Ocean disposal in resident killer whale critical habitat. Canadian Science Advisory Secretariat (CSAS), 25-26 March 2010. Institute of Ocean Sciences, DFO, Sidney, BC.

Ross, P. Lachmuth, C., Alava, J.J., et al. 2010. Introduction: Why are marine mammals so vulnerable to contamination by persistent contaminants? Do sediment quality guideline protect Marine Mammal Health? Workshop on Persistent Contaminants, Sediments, and Killer whale health: Improving our Approaches to Science-based Risk Management. Institute of Ocean Sciences, DFO, and Environment Canada 26 March 2010. Institute of Ocean Sciences, Sidney, BC.

Alava, J.J. 2009. DDT strikes back: Galapagos sea lion at risk. 17th Annual B.C. Marine Mammal  Symposium. November 28, 2009, University of British Columbia, Aquatic Ecosystems Research Laboratory, Vancouver, BC, Canada

Alava, J.J.; Ross, P. S.; Salazar, S.; Gobas, F.A.P.C 2009. Organochlorine pesticides in Galapagos sea lions (Zalophus wollebaeki): Health risks and Management Implications 18th Biennial Conference of the Biology of Marine Mammals. October 12-16, 2009. Quebec City, Canada. [

Alava, J.J. 2009. DDT in Latin America: The legacy continues, with a case study of DDT contamination in the Galapagos sea lions. IX Congress of the Society of Environmental Toxicology and Chemistry (SETAC LA) and the II Peruvian Congress of Ecotoxicology and Environmental Chemistry (SETAC PERU)– International Meeting “Ecotoxicology and Social Responsibility" October 05-09, 2009. SETAC PERU. Lima, Perú. The Biologist (Lima) 7 (1-2):11-12

Calle D. P. y J. J. Alava S.2009. Coastal chemical pollution at continental Ecuador: The case of the Gulf of Guayaquil. IX Congress of the Society of Environmental Toxicology and Chemistry (SETAC LA) and the II Peruvian Congress of Ecotoxicology and Environmental Chemistry (SETAC PERU)– International Meeting “Ecotoxicology and Social Responsibility" October 05-09, 2009. SETAC PERU. Lima, Perú. The Biologist (Lima) 7 (1-2):13

Alava, J.J., F.A.P.C. Gobas, M. Riofrio, J. Olmedo. 2009 Proyecto para el estudio de contaminantes orgánicos persistentes (COPs) y mercurio en la red trófica de la Antártida. Libro de Resúmenes del V Simposio Latinoamericano sobre Investigaciones Antárticas y II Simposio Ecuatoriano de Ciencia Polar. La Libertad, Ecuador, 2- 4 Septiembre 2009.

Alava, J.J., M. Saavedra, X. Arosemena, M. Calle, C. Vinueza, R. Carvajal  y H. Vargas. 2009. Observaciones, distribución y potenciales amenazas del Gavilán Negro de Manglar en el suroeste de Ecuador. Pp. 18. En: Freile J.F., Cisneros-Heredia D.F., Agreda A.E., Lara A. & Santander T. Memorias – II Reunión Ecuatoriana de Ornitología, 26-28 Agosto 2009, Guayaquil. Quito, Ecuador: Aves&Conservación, Fundación Numashir, Universidad San Francisco de Quito.

Alava, J.J. Lambourn, D., Olesiuk, P., Lance, M., Jeffries, S., Gobas, F., Ross, P. S., 2009. Polychlorinated biphenyls (PCBs) and Polybrominated Diphenyl Ethers in Steller sea lions (Eumatopias jubatus) wintering off Vanocuver Islands, BC, Canada. Abstracts, 18th Annual Meeting Pacific Northwest Chapter (PNW)-Society of Environmental Toxicology and Chemistry (SETAC), Port Townsend, WA, April16-18, 2009. pp. 23.

Alava, J.J. Lambourn, D., Olesiuk, P., Lance, M., Jeffries, S., Gobas, F., Ross, P. S., et al. 11th Annual Workshop Brominated Flame Retardants (BFR2009), Ottawa, Canada, May 19-20, 2009.

Alava, J. J., Ross PS, Ikonomou M., Costa D., Salazar S., Aurioles D., Gobas F APC Polybrominated Diphenyl Ether (PBDEs) flame retardants in Galapagos sea lions (Zalophus wollebaeki). 2008. Abstracts, 10th Annual Workshop on Brominated Flame Retardants (BFR2008), Victoria, British Columbia, Canada, June 3−4, pp 53

Alava, J.J., Ross PS,  Ikonomou M, Costa D, Salazar S, Aurioles D, Gobas F APC. 2007. Polychlorinated Biphenyls (PCBs) and Polybrominated Diphenyl Ethers (PBDEs) in Galapagos sea lion pups (Zalophus wollebaeki): Concentrations, patterns and body condition effect. In Abstracts of the 17th Biennial Conference on the Biology of Marine Mammals, 29 Nov - 3 Dec 2007, Cape Town, South Africa.

Alava, J.J., Lambourn, D., Olesiuk, P., Lance, M., Jeffries, S., Gobas, F., Ross, P. S., 2007. Polychlorinated biphenyls (PCBs) and PBDE flame retardants in B.C. Steller Sea Lions. 15th Annual B.C. Marine Mammal  Symposium. November, 2007. University of British Columbia, Aquatic Ecosystems Research Laboratory, Vancouver, BC, Canada

Alava, J., P.S. Ross, D.P Costa, S. Salazar, and F.A Gobas. 2006. Dioxin and Furan levels in Galápagos Sea Lions Pups. 14th Annual B.C. Marine Mammal Symposium, November 25, 2006. UBC Aquatic Ecosystems Research Laboratory, Vancouver, BC, Canada.

Alava J, Ross PS, Costa D, Salazar S and Gobas F A. 2006. Galapagos sea lions (Zalophus wollebaeki) as sentinels of environmental organic pollution in the Galapagos Islands, Ecuador. In Society of Environmental Toxicology and Chemistry. Abstract book of the SETAC North America, 27th Annual Meeting in North America Global Environment and Sustainability: Sound Science in a World of Diversity; 5−9 November 2006, Palais des Congres, Montréal, Québec, Canada. Pp. 151-152.

Alava, J.J. and Félix, F. 2005. Modeling logistic curves of the southeastern pacific humpback whale (Megaptera novaeangliae) stock. In Abstracts of the 16th Biennial Conference on the Biology of Marine Mammals , 12-16 December, 2005. San Diego , California . USA. (Accepted but did not attend).

Félix, F., C. Castro, B. Haase, P. Forestell, J. J. Álava and M. Scheidat. 2005. New estimate of the Southeastern Pacific humpback whale stock off Ecuador . In abstracts of the 16th Biennial Conference on the Biology of Marine Mammals , 12-16 December, 2005. San Diego, California . USA.

Alava, J., P.S. Ross, and F.A Gobas. 2005 Galapagos sea lions/Galapagos Islands: An Overview. An opportunity for eco-toxicological research on pinnipeds. 13th Annual B.C. Marine Mammal Symposium, November 26, 2005. UBC Aquatic Ecosystems Research Laboratory, Vancouver, BC, Canada.

Alava, J.J., J.M. Keller, J.R. Kukclick, and G. Scott. 2005. Anthropogenic flame retardant compounds (PBDEs) measured in loggerhead eggs (Caretta caretta) of the US eastern coast. In Abstracts of the SETAC–North America 26th Annual Meeting, November 13–17, 2005, Baltimore, Maryland, USA. (Accepted but did not attend). pp. 254–246

Calle, N.L. and Alava, J.J.2005 Modeling exposure of mercury dispersion in Richland and Lexington Counties, South Carolina, US. In Abstracts of the SETAC–North America 26th Annual Meeting, November 13–17, 2005, Baltimore, Maryland, USA. pp.368

Alava, J.J.,J. M. Keller, J. Wyneken, L. Crowder, G. Scott, and J. R. Kucklick. 2005. Geographical comparison of persistent organochlorine pollutant levels in loggerhead eggs (Caretta caretta) collected along the Southeast Coast of USA. 25th Annual Symposium on Sea Turtle Biology and Conservation, January 16–22, 2005, Savannah, Georgia, USA.

Alava, J.J.,J. M. Keller, J. R. Kucklick, L. Crowder, J. Wyneken , and G. Scott.2004. Analysis of polychlorinated biphenyls (PCBs) and organochlorine pesticides in loggerhead sea turtle eggs from Florida, U.S. In: Proceedings of the 24th Annual Symposium on Sea Turtle Biology and Conservation, February 22–27, 2004, San Jose, Costa Rica.

Alava, J.J. 2004. Conservation and status of sea lions in Ecuador and Galapagos Islands. In: Abstracts of the 22nd Wakefield Symposium, Sea Lions of the World: Conservation and Research in the 21st Century. September 30–October 3, 2004, Anchorage, Alaska, USA.pp.119

Alava, J.J. 2004. Environmental impact assessment on inland shrimp farming in Ecuador.In: Abstracts of the 2004 Aquaculture Conference (World Aquaculture Society), March 1-5, 2004, Honolulu, Hawaii, USA.

Alava, J.J. 2003. Population dynamics of the Southeastern Pacific Humpback whale (Megaptera novaeangliae) stock off Ecuador. In: Abstracts of the 15th Biennial Conference on the Biology of Marine Mammals, December 14 – 19, 2003, Greensboro, North Carolina, USA, p. 3.

Alava, J.J., J.J. Alava, and G. Alava. 2003. Mortality of Western Sleeper Dormitator latifrons(Richardson,1844), in fish ponds with high levels of nitrite and nitrate in Ecuador. Carolinas SETAC Annual Meeting, April 2-4, 2003, Charleston, South Carolina.

Alava, J.J., M.J., Barragan, C., Castro and R. Carvajal. 2002. A note concerning the newest strandings of humpback whale (Megaptera novaeangliae) related to the bycatch in Ecuador. In: Abstracts of the 8th International Conference. American Cetacean Society’s, October 4-6, 2002, Seattle, Washington, pp.44.

Alava, J.J. 2001.Marine mammals abundance recorded during an oceanographic cruise around Galapagos Islands, Ecuador. In: Abstract of the 14th Biennial Conference on the Biology of Marine Mammals, November 28-December 3,2001, Vancouver, Canada, pp. 3.

Alava J.J, J. Alfaro-Shigueto and O. Patrick .2001. Commerce and use of sea turtle in the Southeast Pacific: Peru and Ecuador. In: Proceedings of the 21st Annual Symposium on Sea Turtle Biology and Conservation, February 24–February 28, 2001, Philadelphia, Pennsylvania, USA.

Alava, J.J., D. Chiriboga, M. Penafiel, N. Calle, P. Jimenez, W. Aguirre, P. Amador, E. Molina,J. Alvarado, and C. Santana. 2002. Historical data on the mortality of sea turtles at various sites on the Equatorial coast and recent observations in regards to a massive mortality of Lepidochelys oilvacea (Reptilia, Cheloniidae). In Mosier, A., Foley, A., and . Brost, B. (compilers).  Proceedings of the 20th Annual Symposium on Sea Turtle Biology and Conservation, February 29-March 4, 2000, Orlando, Florida,USA, pp. 88-89.


 

References

Alava, J.J. (2009) Carbon productivity and flux in the marine ecosystems of the Galapagos Marine Reserve based on cetacean abundances and trophic indices. Revista de Biología Marina y Oceanografía 44: 109-122. http://dx.doi.org/10.4067/S0718-19572009000100010

Carvajal, R. and Alava, J.J. (2007) Mangrove wetlands conservation project and the shrimp farming industry in Ecuador: Lessons learned. World Aquaculture 38: 14-17.

Carvajal, R., Savedra, M. and Alava, J.J. (2005) Population ecology, distribution and habitat assessment of Crocodylus acutus (Cuvier 1807) in the ‘Reserva de Producción de Fauna Manglares El Salado’ of the Guayaquil Gulf Estuary, Ecuador. Revista de Biología Marina y Oceanografía 40: 141–151. http://dx.doi.org/10.4067/S0718-19572005000200007

Dos Santos, M.E. and Lacerda, M. (1987) Preliminary observations of the bottlenose dolphin (Tursiops truncatus) in the Sado Estuary (Portugal). Aquatic Mammals 13: 65-80.

Duffy-Echevarria, E.E., Connor, R.C. and St Aubin, D.J. (2008) Observations of strand-feeding behavior by bottlenose dolphins (Tursiops truncatus) in Bull Creek, South Carolina. Marine Mammal Science 24: 202-206. http://dx.doi.org/10.1111/j.1748-7692.2007.00151.x

Félix, F. (1994) Ecology of the coastal bottlenose dolphin Tursiops truncatus in the Gulf of Guayaquil, Ecuador. Investigations on Cetacea 25: 235-256.

Guinet, C. (1991) Intentional stranding apprenticeship and social play in killer whales (Orcinus orca). Canadian Journal of Zoology 69: 2712–2716. http://dx.doi.org/ 10.1139/z91-383

Guinet, C. and Bouvier, J. (1995) Development of intentional stranding hunting techniques in killer whale (Orcinus orca) calves at Crozet Archipelago. Canadian Journal of Zoology 73: 27–33. http://dx.doi.org/ 10.1139/z95-004

Hoelzel, A.R. (1991) Killer whale predation on marine mammals at Punta Norte, Argentina: food sharing, provisioning, and foraging strategy. Behavioral Ecology and Sociobiology 29: 197–204. http://dx.doi.org/10.1007/BF00166401

Hoese, H.D. (1971) Dolphin feeding out of water in a salt marsh. Journal of Mammalogy 52: 223–224. http://dx.doi.org/10.2307/1378455

Jiménez-Prado, P. and Béarez, P. (2004). Peces Marinos del Ecuador Continental/Marine fishes of continental Ecuador. Tomo II. SIMBIOE/NAZCA/IFEA, Quito, Ecuador.

Jiménez, P.J. and Alava, J.J. (2014) Population ecology and anthropogenic stressors of the coastal bottlenose dolphin (Tursiops truncatus) in the El Morro Mangrove and Wildlife Refuge, Guayaquil Gulf, Ecuador: Toward conservation and management actions. Pages 129-163 in Samuels, J.B. (Ed) Dolphins: Ecology, Behavior and Conservation Strategies, Series: Marine Biology. Nova Science Publishers, Hauppauge, NY, USA.

Jiménez, P., Alava, J.J., Castro, C., Denkinger, J., Haase, B, Utreras, V. and Tirira, D.G. (2011) Delfín nariz de botella, Tursiops truncatus. Pages 239-240 in Tirira, D.G. (Ed.) Libro rojo de los mamíferos de Ecuador. 2.ed. IUCN, Pontificia Universidad Católica del Ecuador (PUCE), Fundación Mamíferos y Conservación, Ministerio del Ambiente (MAE), Quito, Ecuador.

Mann, J. and Sargeant, B. (2003) Like mother, like calf: the ontogeny of foraging traditions in wild Indian ocean bottlenose dolphins (Tursiops sp.). Pages 236-266 in Fragaszy, D.M. and Perry, S. (Eds) The Biology of Traditions: models and evidences. Cambridge University Press, Cambridge, UK.

McHugh, M.B. (1989) Population numbers and feeding behavior of the Atlantic bottlenose dolphin (Tursiops truncatus) near Aransas Pass, Texas. M.Sc. Thesis. University of Texas. Austin, USA. 96 pp.

Mullin, K.D. (1988) Comparative seasonal abundance and ecology of bottlenose dolphins (Tursiops truncatus)in three habitats of the north-central Gulf of Mexico. Ph.D. Thesis. Mississippi State University. Starkville, USA. 135 pp.

Rigley, L., Van Dyke, V.G., Cram, P. and Rigley, I. (1981) Shallow water behavior of the Atlantic bottlenose dolphin (Tursiops truncatus). Proceedings of the Pennsylvania Academy of Science 55: 157–159.

Sargeant, B.L., Mann, J., Berggren, P. and Krützen, M. (2005) Specialization and development of beach hunting, a rare foraging behavior, by wild bottlenose dolphins (Tursiops sp.). Canadian Journal of Zoology 83: 1400-1410. http://dx.doi.org/ 10.1139/z05-136

Silber, G.K. and Fertl, D. (1995) Intentional beaching by bottlenose dolphins (Tursiops truncatus) in the Colorado River Delta, Mexico. Aquatic Mammals 21: 183–186.

Torres, L.G. and Read, A.J. (2009) Where to catch a fish? The influence of foraging tactics on the ecology of bottlenose dolphins (Tursiops truncatus) in Florida Bay, Florida. Marine Mammal Science 25: 797-815. http://dx.doi.org/ 10.1111/j.1748-7692.2009.00297.x

Weiss, J. (2006) Foraging habitats and associated preferential foraging specializations of bottlenose dolphin (Tursiops truncatus) mother-calf pairs. Aquatic Mammals 32: 10-19. http://dx.doi.org/10.1578/AM.32.1.2006.10

Young, R.F. and Phillips, H.D. (2002) Primary production required to support bottlenose dolphins in a salt marsh estuarine creek system. Marine Mammal Science 18: 358-373. http://dx.doi.org/ 10.1111/j.1748-7692.2002.tb01043.x

Downloads

Published

2015-08-24

How to Cite

Jiménez, P. J., & Alava, J. J. (2015). Strand-feeding by coastal bottlenose dolphins (Tursiops truncatus) in the Gulf of Guayaquil, Ecuador. Latin American Journal of Aquatic Mammals, 10(1), 33-37. https://doi.org/10.5597/lajam00191

Issue

Vol. 10 No. 1 (2015)

Section

Notes

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).