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

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Lyle, JM and Moltschaniwskyj, NA and Morton, AJ and Brown, IW 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. ISSN 1323-1650

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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 fishwas 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
Keywords: bait fishing, circle hooks, conventional hooks, deep hooking, hooking injury, hooking mortality, recreational fishing in Tasmania
Journal or Publication Title: Marine and Freshwater Research
Publisher: CSIRO Publishing
Page Range: pp. 445-453
ISSN: 1323-1650
Identification Number - DOI: 10.1071/MF06233
Additional Information:

© CSIRO 2007. http://www.publish.csiro.au/nid/126.htm

Date Deposited: 07 Apr 2008 14:04
Last Modified: 18 Nov 2014 03:33
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