Ontogenetic feeding shifts in two thresher shark species in the Galapagos Marine Reserve.

ABSTRACT:

Background

The morphology and hunting behavior of thresher sharks make them easily distinguishable. These species are distributed across the Tropical Pacific Ocean feeding on squid and small fish. However, ontogenetic changes in their feeding strategies and habitat use are still unknown in this region.

Methods

We examined the δ¹³C and δ¹⁵N signatures in vertebral collagen from populations of Alopias pelagicus and Alopias superciliosus inhabiting the Galapagos Marine Reserve, focusing on three maturity stages: neonate, juvenile and adult. The vertebrae samples were taken from the seizure of illegal fishing activities carried out by a foreign fleet within the Galapagos archipelago. A total of thirty-three vertebrae from A. pelagicus a

SUBMITTER: Arnes-Urgelles C 

PROVIDER: S-EPMC11657203 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature