TY - JOUR
T1 - Food habits of sailfish Istiophorus platypterus off Mazatlán, Sinaloa, Mexico
AU - Arizmendi-Rodríguez, Dana Isela
AU - Abitia-Cárdenas, Leonardo Andres
AU - Galván-Magaña, Felipe
AU - Trejo-Escamilla, Idaly
PY - 2006/11
Y1 - 2006/11
N2 - We analyzed the stomach contents of 533 sailfish taken between August 2002 and August 2003 by the sport fishing fleet off the coast of Mazatlán, Sinaloa, Mexico. A total of 62 different prey taxa was classified, 53 were identified by species, and according to index of relative importance, the most important prey species were Dosidicus gigas (d'Orbigny, 1835) (65%), Argonauta spp. (26%), Balistes polylepis (Steindachner, 1876) (6%), and Auxis spp. (1%). In spite of the apparent high prey diversity, the trophic niche breadth (Levin's index = 0.02) suggests that sailfish close to Mazatlán are specialist predators, feeding mainly on cephalopods (D. gigas and Argonauta spp.). In general, dietary overlap values between size classes ranged from moderate to high and were more evident between sizes of 99.5-119.4 cm than 179.5-199.4 cm postorbital length. There was also a high trophic overlap by sex.
AB - We analyzed the stomach contents of 533 sailfish taken between August 2002 and August 2003 by the sport fishing fleet off the coast of Mazatlán, Sinaloa, Mexico. A total of 62 different prey taxa was classified, 53 were identified by species, and according to index of relative importance, the most important prey species were Dosidicus gigas (d'Orbigny, 1835) (65%), Argonauta spp. (26%), Balistes polylepis (Steindachner, 1876) (6%), and Auxis spp. (1%). In spite of the apparent high prey diversity, the trophic niche breadth (Levin's index = 0.02) suggests that sailfish close to Mazatlán are specialist predators, feeding mainly on cephalopods (D. gigas and Argonauta spp.). In general, dietary overlap values between size classes ranged from moderate to high and were more evident between sizes of 99.5-119.4 cm than 179.5-199.4 cm postorbital length. There was also a high trophic overlap by sex.
UR - http://www.scopus.com/inward/record.url?scp=33846507142&partnerID=8YFLogxK
M3 - Artículo
AN - SCOPUS:33846507142
SN - 0007-4977
VL - 79
SP - 777
EP - 791
JO - Bulletin of Marine Science
JF - Bulletin of Marine Science
IS - 3
ER -