التفاصيل البيبلوغرافية
| العنوان: |
GILL NET SELECTIVITY AND ENMESHING PATTERN OF ALECTIS INDICUS, RUPPELL, 1830 IN BIG MESHED GILL NETS OF THOOTHUKUDI COAST, SOUTH EAST COAST OF INDIA. |
| المؤلفون: |
Neethiselvan, N., Manojkumar, D. ArunJenish, Masilan, K., Ravikumar, T. |
| المصدر: |
Journal of Experimental Zoology India; Jul2017, Vol. 20 Issue 2, p689-696, 8p |
| مصطلحات موضوعية: |
GILLNETTING, FISHERIES, MATURATION (Psychology) scales, DATA analysis, SPAWNING |
| مستخلص: |
A study on the selectivity of big-meshed gill nets with three different mesh sizes on the fishery of the Indian thread fish, Alectis indicus revealed significant selectivity and difference in the enmeshing pattern. The peak-fishing season of A. indicusin the big-meshed gill nets of Thoothukudi coast was found to be from July to September. It was found that among the of three gill nets analysed, the net 'A' with the mesh size of 9cm may be discouraged as it captured mainly immature and maturing animals of A.indicus. The Net C with 14 cm was not harmful to fishery at it captured mainly the fishes which have already attained maturity and might have spawned once. When the mesh size was increased, a clear-cut shift in the enmeshing pattern from snagging to wedging could be observed. The enmeshing factor derived during the investigation clearly indicated the influence of snagging and wedging on the mean selection length of A.indicus caught in gill nets of different mesh sizes. The selection factor of A.indicuswas estimated as 4.29. Based on the length at first maturity (48 cm), the fishable length of capture of A.indicuswas found to be 48.5 cm and accordingly the optimum mesh size of gill net for the commercial fishing of A.indicuswas estimated as 11.2 cm. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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