LA ALIMENTACIÓN DE TIBURONES MARTILLO JOVENES (SPHYRNA LEWINI) CAPTURADOS EN EL GOLFO DE NICOYA, COSTA RICA

Autores/as

  • Ilena Zanella Cesarotto Universidad Nacional de Costa Rica, Instituto Internacional en Conservación y Manejo de Vida Silvestre. Apartado 1350-3000 Heredia, Costa Rica
  • Andrés López Garro Programa Restauración de Tortugas Marinas (PRETOMA). Apartado 1203-1100 San José, Costa Rica
  • Randall Arauz Vargas Programa Restauración de Tortugas Marinas (PRETOMA). Apartado 1203-1100 San José, Costa Rica

DOI:

https://doi.org/10.25268/bimc.invemar.2010.39.2.337

Palabras clave:

Scalloped hammerhead shark, stomach contents, Gulf of Nicoya, realtive importance index

Resumen

Sharks present strong intraspecific changes in feeding habits, which may vary according to size, geographic location and season. This study analyzed the stomach contents of 52 juvenile scalloped hammerhead sharks (25 females and 27 males) caught by artisanal vessels in the Gulf of Nicoya. Regarding the organisms found in the stomachs, 41.07 % were teleost fish, 30.36 % mollusks and 28.57 % crustaceans. Mollusks presented  the  highest  Relative Importance Index  (RII) (43.05  %), followed by teleost fish (41.37 %) and crustaceans (15.58 %). Squids (Loliginidae) were the items with the greatest RII (32.57 %). By means of the Pianka index, a relatively low overlap between sexes was identified, suggesting a  spatial sexual segregation and, in consequence, an ecological niche separation between male and female hammerhead sharks.

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Publicado

2016-01-01

Número

Vol. 39 Núm. 2 (2010)

Sección

Notas científicas

Cómo citar

1.
LA ALIMENTACIÓN DE TIBURONES MARTILLO JOVENES (SPHYRNA LEWINI) CAPTURADOS EN EL GOLFO DE NICOYA, COSTA RICA. Bol. Investig. Mar. Costeras [Internet]. 2016 Jan. 1 [cited 2026 Mar. 5];39(2). Available from: https://boletin.invemar.org.co/index.php/boletin/article/view/337