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MK, Sajeevan, Kurup, B. Madhusoodana. (1398). Maturity, spawning and feeding intensity of cobia Rachycentron canadum (Linnaeus, 1766) in northwest coast of India. سامانه مدیریت نشریات علمی, 19(1), 31-44. doi: 10.22092/ijfs.2019.118540
Sajeevan MK; B. Madhusoodana Kurup. "Maturity, spawning and feeding intensity of cobia Rachycentron canadum (Linnaeus, 1766) in northwest coast of India". سامانه مدیریت نشریات علمی, 19, 1, 1398, 31-44. doi: 10.22092/ijfs.2019.118540
MK, Sajeevan, Kurup, B. Madhusoodana. (1398). 'Maturity, spawning and feeding intensity of cobia Rachycentron canadum (Linnaeus, 1766) in northwest coast of India', سامانه مدیریت نشریات علمی, 19(1), pp. 31-44. doi: 10.22092/ijfs.2019.118540
MK, Sajeevan, Kurup, B. Madhusoodana. Maturity, spawning and feeding intensity of cobia Rachycentron canadum (Linnaeus, 1766) in northwest coast of India. سامانه مدیریت نشریات علمی, 1398; 19(1): 31-44. doi: 10.22092/ijfs.2019.118540

Maturity, spawning and feeding intensity of cobia Rachycentron canadum (Linnaeus, 1766) in northwest coast of India

Iranian Journal of Fisheries Sciences
مقاله 162، دوره 19، شماره 1، فروردین 2020، صفحه 31-44    اصل مقاله (393.29 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22092/ijfs.2019.118540
نویسندگان
Sajeevan MK* ؛ B. Madhusoodana Kurup
Kerala University of Fisheries and Ocean Studies, Panangad, Kochi, Kerala, India.
چکیده
An attempt has been made to provide some vital aspects of reproductive biology of cobia Rachycentron canadum (Linnaeus, 1766). Samples for a period of two years from exploratory vessel and from the landing centers of Mumbai were used for the study. The average sex ratio between male and female observed was 1: 0.80. Dominance of number of female above the size of 100 cm was noticed. The size at first maturity of male and female was 72 and 83 cm respectively. Similarly, age at first maturity of male and female was estimated at 1.77 and 2.17 years respectively. Spawning season based on occurrence of five maturity stages and Gonadosomatic index (GSI) values indicated a throughout the year spawning behavior with peak spawning activity during July-August and November- January. Percentages of feeding condition of various maturity stages indicated that cobia take very less food during their spawning period. spawning period. The results obtained were compared with the results of similar studies round the world and elucidated. 
کلیدواژه‌ها
Rachycentron canadum؛ Maturity؛ Feeding intensity؛ Sex ratio
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