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POPULATION STUDY OF LIZA SUBVIRIDIS SOUTHERN BASRAH CANAL | ||
| Basrah Journal of Agricultural Sciences | ||
| Article 7, Volume 24, Issue 2, 2011, Pages 96-113 PDF (0 K) | ||
| DOI: 10.33762/bagrs.2011.57066 | ||
| Author | ||
| Amjed Kadhum Resen | ||
| Abstract | ||
| Liza subviridis stocks were assessed through catch per unit of effort during the period from July 2008 to Joun 2009. The highest value of catch per unit of effort (CPUE) was 39.91kg/hr in July and the lowest (0kg/hr) in December and January. Length weight relationships were calculated for studied fish species and following equations obtained W = 0.0128 L 3.011 . Regression values (b) calculated for species significantly differ the value from 3. Relative condition factor was ranged from 0.92 in Jun to 1.06 in April. Length Cohort analysis was employed to understand L. subviridis. Catch curve total mortality rate (Z) for (2.943). Natural mortality rates (M) was also calculated (1.102). Fishing mortality rate was 1.841. Food habits were studied. The species was deprivers sex categories were encountered names Alge, inorganic detritus, organic detritus, eggs, diatoms and aquatic plant. For consisted the bulk of food items. Peek feeding activity was at August, September, February and March. Peek feeding intensity was at July. | ||
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