Insights on the use of dolphins (boto, Inia geoffrensis and tucuxi, Sotalia fluviatilis) for bait in the piracatinga (Calophysus macropterus) fishery in the western Brazilian Amazon

Previous reports have noted the use of botos as bait, but stated that the most common bait used are caimans (Melanosuchus niger, Caiman crocodilus). Between October 2010 and November 2011, research was conducted within an area with serious conflicts between dolphins and fishermen as well as intense...

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Bibliographic Details
Published in:The journal of cetacean research and management 2013-01, Vol.13 (2), p.163-173
Main Authors: Iriarte, V, MARMONTEL, M
Format: Article
Language:English
Subjects:
Caiman crocodilus
Cetacea
Inia geoffrensis
Melanosuchus niger
Sotalia fluviatilis
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Summary:Previous reports have noted the use of botos as bait, but stated that the most common bait used are caimans (Melanosuchus niger, Caiman crocodilus). Between October 2010 and November 2011, research was conducted within an area with serious conflicts between dolphins and fishermen as well as intense fishing for piracatinga, i.e. in the lower Japura River, on the border with the Mamiraua and Amana Sustainable Development Reserves, where both boto and tucuxi (Sotalia fluviatilis) are used for bait. One-hundred and fifty-seven monitoring surveys were carried out in eight key communities, confirming 114 piracatinga fishing events through direct monitoring and incognito surveys of fishing gear (gaiolas). Of those, 31.2% (n - 35) involved cetacean bait (91.4% I. geoffrensis, 8.58% S. fluviatilis), 68.7% (n - 77) caiman bait (96% M. niger, 4% C. crocodilus), and two fishing events used both types.
ISSN:1561-0713