Summarising 40 years of gastric lavage studies to evaluate efficiency and survival in sharks and rays.

ABSTRACT: Traditionally, lethal stomach dissection has been used to study the diets of sharks and rays, but conservation and animal welfare concerns necessitate non-lethal alternatives, such as gastric lavage (stomach or gut flushing). In this study, we summarised gastric lavage studies on elasmobranchs to identify which species/groups it has been effective for, the difficulties encountered and if post-release survival has been evaluated. Secondly, we used a field study to (1) demonstrate how to perform gastric lavage on juvenile rays, (2) assess its effectiveness and (3) verify post-release survival using mark-recapture techniques. Only 23 published studies have used gastric lavage on either sharks or rays, indicating that this technique is still highly underutilised in ecological research. Effecti

SUBMITTER: Myers J 

PROVIDER: S-EPMC12327170 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature