REPORT OF INJURIES IN BATOIDS CAUGHT IN SMALL-SCALE FISHERIES: IMPLICATIONS FOR MANAGEMENT PLANS

Alexandre Fernandes Soares Rodrigues, Bianca de Sousa Rangel, Natascha Wosnick, Hugo Bornatowski, Jorge Luís Santos, Renata Guimarães Moreira, Alberto Ferreira de Amorim

Abstract


Despite of the ecological importance of several batoids caught as bycatch, little attention is given to the individual resilience in risk assessments. The report of physical condition is imperative for a realistic understanding of the impacts caused by fishing, as a way to reduce the negative consequences of bycatch and improvement of management protocols. In this context, the present study provides an analysis of injuries observed in nine species of batoids caught by small scale fisheries by adopting a non-lethal approach. Levels of injury were determined according to severity and the relation between fishing time and injury/mortality was assessed. Results showed that injury levels and release condition were strongly influenced by fishing effort and time until release, with fishing effort lower than 110 min related with minor injuries, lower capture mortality rates (10.6%) and better release conditions. Since the frequency of batoids in small scale fisheries as accompanying fauna is high, the cooperation between researchers, fishermen and authorities is essential to reduce the negative consequences of bycatch. Based in the data presented here, we recommend that management plans establish fishing effort times and immediate release in areas of ecological importance for endangered species, thus helping to promote batoids conservation.

Keywords


bycatch; conservation; elasmobranch; impacts of fishing; lesions

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References


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DOI: https://doi.org/10.4257/oeco.2019.2301.07

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