Traditional knowledge identifies causes of bycatch on bottlenose dolphins (Tursiops truncatus Montagu 1821): An ethnobiological approach. (February 2016)

• Record Type: Journal Article
• Authors: Zappes, Camilah Antunes; Simões-Lopes, Paulo César; Andriolo, Artur; Di Beneditto, Ana Paula Madeira
• Is Part Of: Ocean & coastal management. Volume 120(2016)
• Page Start: 160
• Page End: 169
• Publication Date: 2016-02
• Subjects: Bottlenose dolphin -- Bycatch -- Traditional knowledge -- Ethnobiology -- Management; Marine resources -- Management -- Periodicals; Coastal zone management -- Periodicals; Coastal ecology -- Periodicals; Ressources marines -- Périodiques; Littoral -- Aménagement -- Périodiques; Écologie littorale -- Périodiques; Coastal ecology; Coastal zone management; Marine resources -- Management; Periodicals; Electronic journals; 551.46
• DOI: 10.1016/j.ocecoaman.2015.12.006
• Languages: English
• ISSNs: 0964-5691

Abstract

Abstract: Studies have documented the importance of understanding the traditional knowledge of artisanal fishermen regarding fishery-cetacean interactions. In this paper, we identified the effects of artisanal fisheries on bottlenose dolphins ( Tursiops truncatus ) in southern Brazil (∼30°S – 32°S) and searched for alternatives to decrease the possible negative effects based on fishermen's knowledge. In November and December 2009, 44 interviews were conducted with fishermen who worked in the Barra de Imbé/Tramandaí (n = 22) and in the southern part of the Lagoa dos Patos in Rio Grande (n = 22). There is an overlap between bottlenose dolphin distribution and fishery activities, which could cause an increase in bycatch frequency. According to local fishermen, more rigorous laws must be enacted to prevent entanglement. The employment of acoustic alarms in gillnets to reduce the frequency of bycatch is not well accepted because there is a widespread fear of causing a decrease in fishing efficiency. Highlights: Artisanal fisheries affects populations of bottlenose dolphins in southern Brazil. Fishermen does not perceive bycatch as a negative aspect of fisheries on bottlenose dolphin. Fishermen perceives bycatch as being caused by the bottlenose dolphins. Specific areas of bycatch are identified by fishermen. According to fishermen more rigorous laws must be enacted to prevent bycatch.