Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean
ABSTRACT The feeding habits of Makaira nigricans, Kajikia audax, Istiophorus platypterus (Istiophoridae), and Xiphias gladius (Xiphiidae) in the southeast Pacific Ocean were examined in Manta and Santa Rosa, Ecuador. This study describes the diets of these billfish species, evaluates dietary differences between species, and assesses seasonal differences in diet. A total of 274 M. nigricans, 321 K. audax, 267 I. platypterus, and 252 X. gladius were collected between February 2014 and April 2015. The scombrid Auxis spp. was the most important prey for M. nigricans, K. audax and I. platypterus, while the squid Dosidicus gigas was the most important prey for X. gladius. The results of the ANOSIM confirmed significant differences in feeding habits between the members of the family Istiophoridae and X. gladius. Seasonal differences for I. platypterus also were observed. Billfishes are specialist consumers with a narrow niche breadth (B a: M. nigricans and K. audax=0.1, I. platypterus=0.05, and X. gladius=0.04).
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Sociedade Brasileira de Ictiologia
2017
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oai:scielo:S1679-622520170003002042017-10-02Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific OceanLoor-Andrade,PeggyPincay-Espinoza,JonathanCarrera-Fernández,MaribelRosas-Luis,Rigoberto Feeding strategy Food partitioning Istiophoridae Trophic ecology Xiphiidae ABSTRACT The feeding habits of Makaira nigricans, Kajikia audax, Istiophorus platypterus (Istiophoridae), and Xiphias gladius (Xiphiidae) in the southeast Pacific Ocean were examined in Manta and Santa Rosa, Ecuador. This study describes the diets of these billfish species, evaluates dietary differences between species, and assesses seasonal differences in diet. A total of 274 M. nigricans, 321 K. audax, 267 I. platypterus, and 252 X. gladius were collected between February 2014 and April 2015. The scombrid Auxis spp. was the most important prey for M. nigricans, K. audax and I. platypterus, while the squid Dosidicus gigas was the most important prey for X. gladius. The results of the ANOSIM confirmed significant differences in feeding habits between the members of the family Istiophoridae and X. gladius. Seasonal differences for I. platypterus also were observed. Billfishes are specialist consumers with a narrow niche breadth (B a: M. nigricans and K. audax=0.1, I. platypterus=0.05, and X. gladius=0.04).info:eu-repo/semantics/openAccessSociedade Brasileira de IctiologiaNeotropical Ichthyology v.15 n.3 20172017-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300204en10.1590/1982-0224-20160162 |
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Loor-Andrade,Peggy Pincay-Espinoza,Jonathan Carrera-Fernández,Maribel Rosas-Luis,Rigoberto |
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Loor-Andrade,Peggy Pincay-Espinoza,Jonathan Carrera-Fernández,Maribel Rosas-Luis,Rigoberto Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
author_facet |
Loor-Andrade,Peggy Pincay-Espinoza,Jonathan Carrera-Fernández,Maribel Rosas-Luis,Rigoberto |
author_sort |
Loor-Andrade,Peggy |
title |
Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
title_short |
Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
title_full |
Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
title_fullStr |
Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
title_full_unstemmed |
Feeding habits of billfishes (Carangaria: Istiophoriformes) in the Ecuadorian Pacific Ocean |
title_sort |
feeding habits of billfishes (carangaria: istiophoriformes) in the ecuadorian pacific ocean |
description |
ABSTRACT The feeding habits of Makaira nigricans, Kajikia audax, Istiophorus platypterus (Istiophoridae), and Xiphias gladius (Xiphiidae) in the southeast Pacific Ocean were examined in Manta and Santa Rosa, Ecuador. This study describes the diets of these billfish species, evaluates dietary differences between species, and assesses seasonal differences in diet. A total of 274 M. nigricans, 321 K. audax, 267 I. platypterus, and 252 X. gladius were collected between February 2014 and April 2015. The scombrid Auxis spp. was the most important prey for M. nigricans, K. audax and I. platypterus, while the squid Dosidicus gigas was the most important prey for X. gladius. The results of the ANOSIM confirmed significant differences in feeding habits between the members of the family Istiophoridae and X. gladius. Seasonal differences for I. platypterus also were observed. Billfishes are specialist consumers with a narrow niche breadth (B a: M. nigricans and K. audax=0.1, I. platypterus=0.05, and X. gladius=0.04). |
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Sociedade Brasileira de Ictiologia |
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2017 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300204 |
work_keys_str_mv |
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