Daily food intake of Kajikia audax (Philippi, 1887) off Cabo San Lucas, Gulf of California, Mexico

The daily food intake rates of the striped marlin, Kajikia audax (Perciformes: Istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. We analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off Cabo San Lucas, Baja Calif...

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Published inLatin american journal of aquatic research Vol. 39; no. 3; pp. 449 - 460
Main Authors Abitia Cardenas, Leonardo A., Galvan Magana, Felipe, Cruz Escalona, Victor H., Peterson, Mark S., Rodriguez Romero, Jesus
Format Journal Article
LanguageEnglish
Published 01.01.2011
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Summary:The daily food intake rates of the striped marlin, Kajikia audax (Perciformes: Istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. We analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off Cabo San Lucas, Baja California Sur, Mexico, sampled from October 1987 through December 1989. The most important preys were chub mackerel (Scomber japonicus), California pilchard (Sardinops caeruleus), and jumbo squid (Dosidicus gigas); together these represented 55% of the striped marlin diet. The daily food consumption was estimated to be 2 kg per day, or reversible reaction .6% of the mean body weight of K. audax. The total biomass of the prey consumed by the striped marlin during the 27 months of sampling around Los Cabos was estimated at 24.8 ton, of which the chub mackerel represented 29% (7.2 ton), California pilchard just under 16% (3.9 ton), and jumbo squid 10% (2.5 ton). The feeding habits of K. audax are discussed in terms of the distribution of the epipelagic (neritic and oceanic zones), demersal, and benthic prey, confirming that striped marlin migrate vertically and horizontally in search of their food.Original Abstract: Se estimo la tasa de consumo diario de alimento del marlin rayado Kajikia audax (Perciformes: Istiophoridae), sobre la base de analisis cualitativos y cuantitativos de su espectro trofico. Se analizo el contenido estomacal de 505 ejemplares capturados por la flota deportiva frente a Cabo San Lucas, Baja California Sur, Mexico muestreados de octubre 1987 a diciembre 1989. Las presas mas importantes fueron la macarela del Pacifico (Scomber japonicus), sardina monterrey (Sardinops caeruleus) y calamar gigante (Dosidicus gigas), que en conjunto representaron aproximadamente el 55% de la dieta. La tasa de consumo de alimento fue estimado en 2 kg diarios, lo cual represento aproximadamente el 3,6% del peso corporal de K. audax. La biomasa total de presas consumidas por el marlin rayado durante los 27 meses muestreados en la zona de Los Cabos fue estimada en 24,8 ton, de las cuales la macarela del Pacifico represento alrededor del 29% (7,2 ton), la sardina monterrey poco menos del 16% (3,9 ton) y el calamar gigante aproximadamente el 10% (2,5 ton). Los habitos alimentarios de K. audax se discutieron segun la distribucion de las presas epipelagicas (neriticas y oceanicas), demersales y bentonicas; lo cual confirmo la conducta migratoria (movimientos verticales y horizontales) del marlin rayado en busca de su alimento.
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ISSN:0718-560X
0718-560X
DOI:10.3856/vol39-issue3-fulltext-6