کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9481802 | 1327236 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reproductive biology of the sand smelt Atherina presbyter Cuvier, 1829 (Pisces: Atherinidae) in the central-east Atlantic
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Reproductive biology of the sand smelt Atherina presbyter Cuvier, 1829 (Pisces: Atherinidae) in the central-east Atlantic Reproductive biology of the sand smelt Atherina presbyter Cuvier, 1829 (Pisces: Atherinidae) in the central-east Atlantic](/preview/png/9481802.png)
چکیده انگلیسی
This study investigates the reproductive biology of Atherina presbyter, a fast growing, short-lived coastal pelagic fish found off the Canary Islands. Sampling was carried out monthly between January 1997 and June 1998. The sex of adult fishes (N = 878) was determined macroscopically and the proportion of males was significantly lower than that of females with a ratio of 1:1.34 males/females. Histological analysis of the ovaries showed the species had non-synchronic oocyte development, and egg-laying occurred in separate batches comprising 20-35% of oocytes. The total length at 50% maturity was 65.4 and 73.1Â mm for males and females, respectively. The spawning period occurred predominantly during spring, although a few females were ripe at the beginning of autumn. The average relative fecundity was estimated as per 49.2Â eggs/g of fish (S.D. = 22.4) and it depended on the gonad weight which increased with fish length. The relative fecundity was higher in the southern than in the northern and central parts of the distribution area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 72, Issue 1, April 2005, Pages 121-131
Journal: Fisheries Research - Volume 72, Issue 1, April 2005, Pages 121-131
نویسندگان
Teresa Moreno, José Juan Castro, Juan Socorro,