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بررسی برخی از ویژگیهای زیستی کیلکای آنچوی( Clupeonella engrauliformis )در آبهای گیلان | ||
| مجله علمی شیلات ایران | ||
| مقاله 5، دوره 8، شماره 1، فروردین و اردیبهشت 1378، صفحه 59-70 اصل مقاله (646.17 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/isfj.1999.116380 | ||
| نویسنده | ||
| محمد صیاد بورانی | ||
| چکیده | ||
| بررسی برخی از ویژگیهای زیستی کیلکای آنچوی( Clupeonella engrauliformis )در آبهای گیلان | ||
| کلیدواژهها | ||
| ویژگیهای زیستی؛ کیلکای آنچوی( Clupeonella engrauliformis )؛ آبهای گیلان | ||
| عنوان مقاله [English] | ||
| Some Biological Survey of the Clupeonella engrauliformis (Anchovy-like Kilka) in Guilan Coastal Region, the South-West of Caspian Sea, in 1996-97 | ||
| نویسندگان [English] | ||
| M. Sayad Bourani | ||
| چکیده [English] | ||
| According to a survey in 1996, among three species of kilka, living in the South-West of Caspian sea, anchovy-like kilka composes 90.3% of total kilka catch. In all seasons of a year, anchovy-like kilka, in the second stage Of gonadal maturation, shows higher abundance in the catch, compared with other maturation stages. This indicates anchovy-like kilka shows more positive phototaxis, at the begining of its sexual maturation.Sex ratio shows females dominancy is 54.8-60, 7-75.9 and 82 percent in spring, summer, autumn and winter respectively. The average length of this fish in the four seasons with above order were 98.6±10.8, 97.7±10.3, 99.6±10.6, 100.1 ± 10.6 and the mean weight were 8.24±1.1, 7.5±1.7, 7.3±1.96 and 6.9±1.56 gr. The age composition of anchovy caught on spring in 1997 ranged between 2-5 years old and the dominate group was 3-year-old. The K value and infinite length calculated 0.27 and 147.8 mm respectively. No significant differences were observed between male and female concerning fat reserve and feeding intensity. | ||
| کلیدواژهها [English] | ||
| Kilka, CLUPEONELLA ENGRAULIFORMIS, Caspian Sea, Iran | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 261 تعداد دریافت فایل اصل مقاله: 251 |
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