کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4544517 1327199 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variations in the instantaneous mortality rate between larval patches of Pacific bluefin tuna Thunnus orientalis in the northwestern Pacific Ocean
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Variations in the instantaneous mortality rate between larval patches of Pacific bluefin tuna Thunnus orientalis in the northwestern Pacific Ocean
چکیده انگلیسی

We followed three patches of larval Pacific bluefin tuna (Thunnus orientalis) using Lagrangian drifters in 2004 and 2005 from May to June and determined the age-specific larval instantaneous mortality rates, which were estimated to be between 0.06 and 2.75 day−1. The mortality rates differed significantly between patches and between ages within the same patch, which were higher than most of the estimations for other marine fish larvae. The results indicate that for the purpose of understanding the process of the larval survival, the use of larval patches is appropriate as a unit of observation. Evidence of the occurrence for net avoidance is presented and also it is concluded that net extrusion was observed for the larvae. Length-specific catch probability of the larvae was estimated to correct for length distribution biases derived from the net avoidance and net extrusion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 89, Issue 3, March 2008, Pages 248–256
نویسندگان
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