Browsing by Author "Hasan, Mehedi Mahmudul"

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    COMPARATIVE STUDY OF ENDOPARASITIC INFESTATION IN CHANNA PUNCTATUS (BLOCH, 1793) COLLECTED FROM HATCHERY AND SEWAGE LAGOON
    (Daffodil International University, 2011-07-01) Rakibuzzaman, Md.; Raknuzzaman, Md.; Bhuiyan, Aminul Islam; Hasan, Mehedi Mahmudul
    The present study was conducted to identify and determine the prevalence and intensity of infestation brought about by the endoparasites in Channa punctatus (Bloch,1793) from different water bodies of varying water quality in Bangladesh. The prevalence of endoparasites in the host fish Channa punctatus was 91.30% in female and 88.88% in male fishes, among them in sewage water fishes the prevalence was 85.71% in female and 86.66% in male and in fishes collected from a hatchery the prevalence was 100% in both the male and female fishes. The intensities of infestation in Channa punctatus was 6.78 in female and 6.55 in male fish collected from hatchery; and in sewage water fishes the intensity was 3.50 in females and 1.15 in males respectively. Six parasite species were found from polluted water fishes and seven species of parasites were recorded from fresh water fishes. The intensity and the prevalence were higher in host fishes collected from hatchery than the sewage water host fishes.
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    Estimation Of Fecundity And Gonadosomatic Index (Gsi) Of Paradise Threadfin, Polynemus Paradiseus (Linnaeus, 1758) From The Meghna River Estuary, Bangladesh
    (Daffodil International University, 2013-07) Rahman, Md. Mofizur; Sultana, Afrin; Hasan, Mehedi Mahmudul; Sarker, Bhakta Supratim; Rahman, Mahabubur
    The present investigation was conducted to assess the fecundity and gonadosomatic index of female Polynemus paradiseus (L.) of the Meghna river estuary during the spawning season. A total of 75 samples were collected from local fish markets Chairmanghat, Sonapur and Maijdee of Noakhali. Mean total length and mean body weight of the collected fish samples were 16.38 ± 0.29 cm and 25.01 ± 1.45g respectively. The mean total fecundity was found 11383.33 ± 343.35.Variation in fecundity, GSI, total length, body weight and gonad weight of the studied species was found across the spawning season (April- June). Gonadosomatic index was found higher in May-June than April. The relationships of fecundity with body length, body weight and gonad weight were found to be linear and correlation coefficient (r) values were 0.6861, 0.7823 and 0.8049 respectively. The linear relationship between body weight and fecundity was found more valid than the relationship between body length and fecundity. The present study revealed that the fecundity of P. paradiseus was comparatively low than other estuarine fish species. Basic information on the size at sexual maturity and fecundity of P. paradiseus will be helpful to evaluate reproductive potential of individual fish species in similar studies.