Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina

The Neotropic Cormorant (Phalacrocorax brasilianus) is a widespread and abundant species distributed throughout the Neotropics. We report on diving behavior and foraging areas of Neotropic Cormorants in inshore marine waters of Patagonia, Argentina. Mean dive duration was 18.9 ± 5.3 sec and differed...

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Detalles Bibliográficos
Autores principales: Quintana, Flavio Roberto, Yorio, Pablo Martín, Gatto, Alejandro Javier
Publicado: 2004
Materias:
diet
diving behavior
feeding ground
foraging behavior
seabird
Patagonia
South America
Aves
Phalacrocoracidae
Phalacrocorax
Phalacrocorax brasilianus
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00435643_v116_n1_p83_Quintana
http://hdl.handle.net/20.500.12110/paper_00435643_v116_n1_p83_Quintana
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00435643_v116_n1_p83_Quintana
record_format dspace
spelling paper:paper_00435643_v116_n1_p83_Quintana2023-06-08T15:04:58Z Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina Quintana, Flavio Roberto Yorio, Pablo Martín Gatto, Alejandro Javier diet diving behavior feeding ground foraging behavior seabird Patagonia South America Aves Phalacrocoracidae Phalacrocorax Phalacrocorax brasilianus Phalacrocorax brasilianus The Neotropic Cormorant (Phalacrocorax brasilianus) is a widespread and abundant species distributed throughout the Neotropics. We report on diving behavior and foraging areas of Neotropic Cormorants in inshore marine waters of Patagonia, Argentina. Mean dive duration was 18.9 ± 5.3 sec and differed significantly among birds. Maximum dive duration was 43 sec. Birds spent 58-79% of their time at sea underwater. Mean recovery time at the surface between successive dives was 6.7 ± 1.5 sec, and was also significantly different among individuals. Mean diving efficiency (mean dive duration time/mean recovery time) was 2.6 ± 0.5 (range: 0.5-4.6). We were able to locate birds while feeding on 112 of 215 occasions. Almost 90% of mapped locations (68 feeding trips) were within 2.5 km of the colony. However, we did not receive a signal on 103 occasions, suggesting that foraging may also occur in waters outside the inlet where the colony was located. High variability in dive duration and recovery time is congruent with flexible foraging techniques and diet, as Neotropic Cormorants feed on both bottom and pelagic schooling fish. Fil:Quintana, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Yorio, P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gatto, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2004 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00435643_v116_n1_p83_Quintana http://hdl.handle.net/20.500.12110/paper_00435643_v116_n1_p83_Quintana
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic diet
diving behavior
feeding ground
foraging behavior
seabird
Patagonia
South America
Aves
Phalacrocoracidae
Phalacrocorax
Phalacrocorax brasilianus
Phalacrocorax brasilianus
spellingShingle diet
diving behavior
feeding ground
foraging behavior
seabird
Patagonia
South America
Aves
Phalacrocoracidae
Phalacrocorax
Phalacrocorax brasilianus
Phalacrocorax brasilianus
Quintana, Flavio Roberto
Yorio, Pablo Martín
Gatto, Alejandro Javier
Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
topic_facet diet
diving behavior
feeding ground
foraging behavior
seabird
Patagonia
South America
Aves
Phalacrocoracidae
Phalacrocorax
Phalacrocorax brasilianus
Phalacrocorax brasilianus
description The Neotropic Cormorant (Phalacrocorax brasilianus) is a widespread and abundant species distributed throughout the Neotropics. We report on diving behavior and foraging areas of Neotropic Cormorants in inshore marine waters of Patagonia, Argentina. Mean dive duration was 18.9 ± 5.3 sec and differed significantly among birds. Maximum dive duration was 43 sec. Birds spent 58-79% of their time at sea underwater. Mean recovery time at the surface between successive dives was 6.7 ± 1.5 sec, and was also significantly different among individuals. Mean diving efficiency (mean dive duration time/mean recovery time) was 2.6 ± 0.5 (range: 0.5-4.6). We were able to locate birds while feeding on 112 of 215 occasions. Almost 90% of mapped locations (68 feeding trips) were within 2.5 km of the colony. However, we did not receive a signal on 103 occasions, suggesting that foraging may also occur in waters outside the inlet where the colony was located. High variability in dive duration and recovery time is congruent with flexible foraging techniques and diet, as Neotropic Cormorants feed on both bottom and pelagic schooling fish.
author Quintana, Flavio Roberto
Yorio, Pablo Martín
Gatto, Alejandro Javier
author_facet Quintana, Flavio Roberto
Yorio, Pablo Martín
Gatto, Alejandro Javier
author_sort Quintana, Flavio Roberto
title Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
title_short Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
title_full Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
title_fullStr Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
title_full_unstemmed Diving behavior and foraging areas of the neotropic cormorant at a marine colony in Patagonia, Argentina
title_sort diving behavior and foraging areas of the neotropic cormorant at a marine colony in patagonia, argentina
publishDate 2004
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00435643_v116_n1_p83_Quintana
http://hdl.handle.net/20.500.12110/paper_00435643_v116_n1_p83_Quintana
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AT yoriopablomartin divingbehaviorandforagingareasoftheneotropiccormorantatamarinecolonyinpatagoniaargentina
AT gattoalejandrojavier divingbehaviorandforagingareasoftheneotropiccormorantatamarinecolonyinpatagoniaargentina
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