Data/hora: 09/06/2024 09:22:14

Provedor de dados: | 20
País: | Belgium

Título:

La alimentación de tiburones martillo jovenes (Sphyrna lewini) capturados en el Golfo de Nicoya, Costa Rica (Nota)

The feeding habits of juvenile scalloped hammerhead sharks (Sphyrna lewini) caught in the Gulf of Nicoya, Costa Rica (Note)

Autores: | López-Garro, A.; Zanella-Cesarotto, Il.; Arauz-Vargas, R.
Data: | 2011-07-07
Ano: | 2010
Palavras-chave: | Stomach content; Shark fisheries.
Resumo: | 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.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

Boletín de investigaciones marinas y costeras, 39(2). p. 447-453

0122-9761

http://hdl.handle.net/1834/4027

Editor: | INVEMAR, Santa Marta (Colombia)