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Effects of hooking damage and hook type on post-release survival of sand flathead (Platycephalus bassensis)

Lyle, J.M. and Moltschaniwskyj, N.A. and Morton, A.J. and Brown, I.W. and Mayer, D. (2007) Effects of hooking damage and hook type on post-release survival of sand flathead (Platycephalus bassensis). Marine and Freshwater Research, 58 (5). pp. 445-453.

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Article Link(s): http://dx.doi.org/10.1071/MF06233

Publisher URL: http://www.publish.csiro.au

Abstract

This study examined post-release survival in sand flathead (Platycephalus bassensis) and whether there were survival benefits from the use of circle hooks over conventional hook patterns. Anatomical hooking location was the major factor contributing to mortality, with an almost 100% survival rate for fish hooked in the lip, mouth or eye (shallow-hooked) compared with around 64% for fish hooked in the throat or gut (deep-hooked). Mortality in deep-hooked fish was generally associated with injuries to vital organs (gills, heart, liver) and survival was significantly lower if bleeding was associated with injury (54% compared with 85% for non-bleeders). Circle hooks resulted in significantly lower deep-hooking rates (1%) compared with conventional hook types (4-9%) and, based on catch rates, were at least as effective as conventional hook patterns. Estimated survival rates for line-caught sand flathead were high, over 99% for circle hooks and between 94 and 97% for conventional hooks. These findings support the efficacy of management strategies based on size and bag limits and the practice of catch-and-release fishing for sand flathead, as well as a potential conservation benefit from the use of circle hooks.

Item Type:Article
Additional Information:© CSIRO.
Keywords:Bait fishing; circle hooks; conventional hooks; deep hooking; hooking injury; hooking mortality; recreational fishing in Tasmania.
Subjects:Aquaculture and Fisheries > Fisheries > Fishery for individual species
Aquaculture and Fisheries > Fisheries > Fishery research
Aquaculture and Fisheries > Fisheries > Methods and gear. Catching of fish
Aquaculture and Fisheries > Fisheries > Fishery conservation
Deposited On:28 Apr 2009 03:03
Last Modified:06 Sep 2010 07:32

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