نتایج جستجو برای: shad
تعداد نتایج: 396 فیلتر نتایج به سال:
The study was aimed at following the movement of adolescent Tenualosa ilisha from nursery grounds to feeding and spawning or other type movements in Bangladesh waters. To accomplish this, data on metazoan endoparasites were used as biological tags for detection migratory route. A total 2667 host fishes collected eleven sites covering three different ecological habitats Bangladesh. Initial selec...
RAPD was used to delineate the hilsa populations sampled from the Ganga, Yamuna, Hooghly, and Narmada Rivers at six different locations. Six degenerate primers were used to generate the fragment patterns from the samples collected. All primers were highly polymorphic and generated high numbers of amplification products. Nei's genetic distances were calculated between locations. The overall aver...
—Variation in habitat suitability can alter the growth and mortality of early life stages of fishes but is often difficult to measure, quantify, and apply to the entire system. We designed and tested habitat suitability index (HSI) models incorporating both proximate riverine parameters and surrounding landscape features as determinates of optimal spawning and nursery areas for American shad Al...
Juvenile American shad Alosa sapidissima were subjected to isothermal transfers into sea water (salinity 24) ‘early’ (1 September; 24 C) and ‘late’ (10 November; 10 C) in the autumn migratory season. Early acclimation resulted in a modest osmotic perturbation that recovered rapidly. Haematocrit declined by 14% at 24 h, recovering within 48 h. Plasma osmolality increased by 6% at 4 h, recovering...
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