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Articles by A.S.M. Saifullah
Total Records ( 2 ) for A.S.M. Saifullah
  A.S.M. Saifullah , M.K. Abu Hena , M.H. Idris , A.R. Halimah and I. Johan
  The composition and diversity of phytoplankton were studied along with physico-chemical parameters of water of two mangrove-dominated estuaries i.e., Kuala Sibuti (KS) and Kuala Nyalau (KN), Sarawak, Malaysia. A total of 46 species of phytoplankton with the mean density of 147000 cells L-1 were recorded from KS estuary i.e., 3 species of Cyanophyceae; 22 species of Bacillariophyceae; 20 species of Dinophyceae and 1 species of Chlorophyceae. The recorded mean density of phytoplankton was 113000 cells L-1 with 33 species from 19 genera from KN estuary, in which 19 species were from Bacillariophyceae; 12 species were from Dinophyceae; 1 species was from Cyanophyceae and 1 species was from Chlorophyceae. In both the estuaries, the species composition was found to be in an order of Diatom>Dinoflagellate>Cyanophyceae>Chlorophyceae. Canonical Correspondence Analysis (CCA) revealed that the abundance of Bacillariophyceae and Dinoflagellates was influenced by salinity and conductivity along with ammonium and phosphate while the abundance of Chlorophyceae was influenced by temperature, TDS, DO and pH in KS. The influence of salinity and conductivity along with PO4 and NH4 on the abundance of Bacillariophyceae, Dinoflagellates and Chlorophyceae were observed in KN.
  A.S.M. Saifullah , Md. Sayedur Rahman and Yusuf Sharif Ahmed Khan
  In the present study fecundity of Hilsa ilisha (Hamilton, 1822) was estimated for 20 fully matured females from the Bay of Bengal, Bangladesh. The fecundity (F) was found to range from 10,30,951 to 19,40,620 (mean 13,77,884±2,90,145) in fishes between 39 and 51 cm total length (TL) with the mean of 44.08±3.84 cm. Standard length (SL), body weight (BW), gonad weight (GW), mean diameter of egg and Gonado Somatic Index (GSI) were found to range from 34 to 46 cm (mean 39.45±3.67), from 800 to 1,700 g (mean 1,155.50±260.76), from 71.15 to 217 g (mean 141.33±42.22), from 0.66 to 0.85 mm (mean 0.78±0.06) and from 7.5 to 15.85 (mean 12.15±2.19), respectively. The co-efficient of correlation for F/TL (F= 532.231 TL2.07 or, log F = 2.73 + 2.07 log TL), F/SL (F= 1,293.898 SL1.89 or, log F= 3.12+1.89 log SL), F/BW (F= 7,703.711 BW0.74 or, log F = 3.887+0.74 log BW) and F/GW (F= 71,186.887 GW0.60 or, log F= 4.85+0.60 log GW) were obtained as 0.86, 0.85, 0.82 and 0.94, respectively for the logarithmic scale. The regression line for the TL, SL, BW and GW of the fishes were found to be linear when they were plotted against their fecundity on logarithmic scales. Highly significant (p<0.05) linear relationship for logarithmic scale was obtained for all the variables. Body weight was found to be the best indicator of the fecundity of H. ilisha.
 
 
 
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