作者
Matthew J. Smukall, Tristan L. Guttridge, Félicie Dhellemmes, Andrew C. Seitz, Samuel H. Gruber
发表日期
2021/5
期刊
Fisheries Research
卷号
240
出版商
Elsevier
简介
Our study assessed the influence of leader type (monofilament vs stainless steel cable) and gear strength (i.e., hook size and leader thickness) on species composition, catch rates, and size distribution of sharks captured in a fisheries independent longline survey near Bimini, The Bahamas. A total of 28 surveys were conducted, resulting in 50,400 hook hours. Catches consisted of 167 sharks from eight species. Overall, catches were higher on monofilament leaders for light duty gear, but there was no difference for heavy duty gear. When bite-offs were combined with catches to form ‘total shark contacts’ the rates were not significantly different between the two leader types. Tiger sharks were the only species to show differences in mean pre-caudal lengths between light and heavy duty gear, likely due to the wide range of size classes encountered for this species. These results further highlight the importance of …
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