Sagua, V.O. and Gubio, A.
A study of the length at maturity and hooks/gill net mesh selection in Clarias lazera from Lake Chad.
In: 3rd Annual Conference of the Fisheries Society of Nigeria (FISON)
, 22-25 February, 1983
, Maiduguri, Nigeria.
The minimum length at first maturity of Clarias lazera was found to be 24 cm (4.8%) for females and 20 cm (1.8%) for males. Fifty percent maturity was attained at length of 28 cm to 30 cm for both sexes; there being little difference among the sexes at this level of maturity. The modal retention lengths for gill nets were: 13 cm for 25.5 mm mesh; 18 cm for 32 mm mesh; 28 cm for 57 mm mesh; and 38 cm for 76 mm mesh. Modal lengths of Clarias lazera caught by various hooks sizes were No. 10 (28 cm); No. 11 (33 cm); Nos. 15 and 16 (28 cm). It is recommended that to protect the clarias fishery in Lake Chad, the use of gill nets of less than 57 mm mesh size and fishing hook No. 16 (and smaller sizes) which caught 43.94% of immature fishes should be discouraged
Conference or Workshop Item
||A study of the length at maturity and hooks/gill net mesh selection in Clarias lazera from Lake Chad
||3rd Annual Conference of the Fisheries Society of Nigeria (FISON)
||22-25 February, 1983
||Fisheries Society of Nigeria
||Nigeria, Lake Chad; fishery management; lake fisheries; mesh selectivity; population structure; size distribution; Clarias lazera;
Ms Maria Kalentsists
||28 May 2010 19:20
||29 Sep 2011 17:24
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