کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4549468 1627369 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development and lipid storage in Calanus euxinus from the Black and Marmara seas: Variabilities due to habitat conditions
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
پیش نمایش صفحه اول مقاله
Development and lipid storage in Calanus euxinus from the Black and Marmara seas: Variabilities due to habitat conditions
چکیده انگلیسی

Oil sac volume, gonad size and moulting patterns were investigated in the copepod Calanus euxinus inhabiting deep and shallow zones of the Black Sea and penetrating into the Marmara Sea. In summer the C. euxinus population in deep layers of the Black Sea was dominated by pre-diapause and diapausing postmoult copepodite stage V (CV) with small sexually undifferentiated gonads and mean lipid content of 14.1 ± 6.0% of body volume. The lipid content of deep-living females was 7.2 ± 4.2% of body volume. At the same time, intermoult and premoult CV with enlarged gonads and low lipid content (7.7 ± 5.1% of body volume) and females with oil sac volume of 1.4 ± 1.0% were found at shallow stations. Premoult CV with oil volume of 0.6 ± 0.8% and mature females with little visual evidence of substantial lipid storage dominated in the Marmara Sea. The differences in moulting patterns and oil sac volumes of C. euxinus from deep zones and shallow regions suggest that vertical migrations to the oxygen minimum zone (OMZ) are necessary for formation of large lipid reserves providing high reproductive potential of this species. On the basis of an energy balance model it was shown that under low phytoplankton concentration of about 30 μg C l− 1 preadults and adults migrating to the OMZ could accumulate lipids (up to 5% of body energy content daily), in contrast to copepods constrained to shallow oxic water columns of the Black Sea and from the Marmara Sea.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Marine Systems - Volume 59, Issues 1–2, January 2006, Pages 52–62
نویسندگان
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