Microplastics pollution in the Surma River, Bangladesh: A rising hazard to upstream water quality and aquatic life.

The ecological health of freshwater rivers is deteriorating globally due to careless human activities, for instance, the emission of plastic garbage into the river. The current research was the first assessment of microplastics (MPs) pollution in water, sediment, and representative organisms (fish, crustacean, and bivalve) from the Surma River. Water, sediment, and organisms were sampled from six river sites (Site 1: Charkhai; Site 2: Golapganj; Site 3: Alampur; Site 4: Kazir Bazar; Site 5: Kanishail and Site 6: Lamakazi), and major water quality parameters were recorded during sampling.

Assessment of dietary polyvinylchloride, polypropylene and polyethylene terephthalate exposure in Nile tilapia, Oreochromis niloticus: Bioaccumulation, and effects on behaviour, growth, hematology and histology.

Microplastics (MPs) have been recognized as emerging aquatic pollutants receiving major concern due to their detrimental effects on aquatic life. Nile Tilapia, Oreochromis niloticus is a model species considered in toxicological studies to address the effects of pollutants in freshwater animals. However, comprehensive knowledge comparing the impacts on fish across various MPs polymers is scarce.

Intraspecific phenotypic differences in climbing perch (Bloch, 1792) populations may be linked to habitat adaptations.

The climbing perch, is a nutritionally and economically significant food fish. The present study reveals the first comprehensive description of the life-history traits of scooped up through different traditional fishing gears from July 2020 to December 2020. Among the 120 collected specimens, the smallest and largest specimens were 8.

Comparative study of ovarian development in wild and captive-reared long-whiskered Sperata aor (Hamilton, 1822).

Long-whiskered catfish Sperata aor is a freshwater catfish known for its supreme flesh quality and fast growth, whose captive-reared broodstock denotes a difficult challenge for aquaculture. The reproductive dysfunctions in long-whiskered catfish raised in tank conditions were observed by comparing tissue biochemical composition and ovarian histology of wild female broodstock. Sixty (60) female broodstocks were used in the current study, consisting of 30 reared at sandy-muddy soil tank bottoms in captive conditions and 30 wild individuals collected from the haor basin during the breeding season.

Impact of Pb Toxicity on the Freshwater Pearl Mussel, : Growth Metrics, Hemocyto-Immunology, and Histological Alterations in Gill, Kidney, and Muscle Tissue.

Pb is one of the most extensively used harmful heavy metals in Bangladesh, and its occurrence in waters affects aquatic organisms significantly. The tropical pearl mussel, was exposed to different concentrations (T 21.93 mgL, T 43.

Biometric indices, growth pattern, and physiological status of captive-reared indigenous Yellowtail brood catfish, Pangasius pangasius (Hamilton, 1822).

The current study was conducted to comprehend the variation of the growth pattern and the physiological status of Pangasius pangasius (Hamilton, 1822) reared in the pond from July 2021 to September 2021. A total of 90 brood individuals were collected from the Meghna River and studied for the present experiment. The overall growth pattern for P.

Assessment of Lead (Pb) Toxicity in Juvenile Nile Tilapia, -Growth, Behaviour, Erythrocytes Abnormalities, and Histological Alterations in Vital Organs.

Lead (Pb) is one of the toxins responsible for the deterioration of ecological health in aquatic environments. The present study investigated the effects of Pb(NO) toxicity on growth, blood cell morphology, and the histopathology of gills, liver, and intestine of juvenile Nile tilapia, . A 30-day long aquarium trial was conducted by assigning three treatment groups T 5.

Optimization of 17α-methyltestosterone dose to produce quality mono-sex Nile tilapia .

The 17α-methyltestosterone is the most common synthetic hormone used in male mono-sex production of Nile tilapia, . The current research aimed at finding out the most effective dose of 17α-methyltestosterone to produce quality Nile tilapia fry. Soon after absorbing the yolk sac, Nile tilapia fry was fed with a mixture of commercial fish feed and 17α-methyltestosterone for 28 days.

Toxic effects of chlorpyrifos on the growth, hematology, and different organs histopathology of Nile tilapia, .

Chlorpyrifos is a widely applied insecticide that permeates on most waterways and affects aquatic organisms. The growth performances, hematological and histological impacts on Nile tilapia, following a 60 day of exposure to varying concentrations of chlorpyrifos 20 EC (T 08 µgL, T 16 µgL, and T 32 µgL) were compared to a control T 0 µgL. The 96-hour LC50 of chlorpyrifos 20 EC was calculated as 46.