کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4543263 1626829 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Age and growth of anglerfish (Lophius piscatorius) in Faroese waters
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Age and growth of anglerfish (Lophius piscatorius) in Faroese waters
چکیده انگلیسی

To investigate the reliability of age–length growth estimates of anglerfish Lophius piscatorius in Faroese waters, results from illicia age determination, length frequency and mark-recapture analyses were compared. Features of the illicium, such as the time of deposition and sizes of the benthic and first annual zones, width and the marginal increment progression of the edge were studied in detail. Results showed that the average horizontal diameters of the benthic and first annual zones were 0.18 mm (age 0) and 0.32 mm (age 1), respectively, and these zones could be identified in anglerfish of any length. There was a strong positive correlation between illicium width and fish length. In transmitted light the edge was usually dark in the winter and light in the summer, and the transition between them took place in May/June. Results from illicia age-readings and length-frequency analysis show that anglerfish in these waters have a very high growth rate during their first years of life (age 0–1, 18.5 cm year−1), after which smaller individuals grow faster than larger fish. Growth rates of fish larger than 35 cm in length are comparable to the fastest growth rates in other areas of the North Atlantic. Since the illicia age determinations resulted in growth rates that were consistent with length frequency and mark-recapture analyses, we believe that illicia derived age length keys could be used in age-based assessment of anglerfish in Faroese waters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 139, March 2013, Pages 51–60
نویسندگان
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