کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8885249 | 1626763 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Configuring escape gaps in recreational rectangular traps to improve size selection for eastern rock lobster, Sagmariasus verreauxi
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
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چکیده انگلیسی
The utility of escape gaps in rectangular traps for improving the size selection of eastern rock lobster, Sagmariasus verreauxi was assessed during two experiments in an Australian recreational fishery. In experiment one, compared to conventional traps (no escape gaps), those comprising one (57â¯Ãâ¯500â¯mm) or three (each 57â¯Ãâ¯200â¯mm) escape gaps along their sides maintained legal catches of S. verreauxi, but did not significantly affect undersized (<104â¯mm carapace length; CL) catches; although there were fewer (mean catch reduced by 35%) in the latter traps. In experiment two, three escape gaps all located either on the sides or corners of traps significantly reduced catches of undersized S. verreauxi by up to 82%, with no effect on legal catches, and when catches were pooled between treatments, produced a 50% CL at selection of 102â¯mm with a selection range of 10â¯mm. Notwithstanding the inter-experimental differences-which possibly reflected relative catches and density-dependent escape rates-escape gaps should be enforced in recreational traps targeting S. verreauxi as a means for reducing discarding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 207, November 2018, Pages 182-186
Journal: Fisheries Research - Volume 207, November 2018, Pages 182-186
نویسندگان
Matt K. Broadhurst, Russell B. Millar,