Environmental protection has fascinated the attention of the varied section of people globally th... more Environmental protection has fascinated the attention of the varied section of people globally thereby creating global issue amongst researchers and scientists working in this area. Pesticides are toxic to aquatic biota which form important components of the food chain such as fishes. Fishes are important sources of protein in nation-state’s diet. So a detailed understanding of the pollutant effect on fishes would be rewarding for fish conservation and fishery development. Cypermethrin, a synthetic pyrethroid pesticide and potential toxic pollutant contaminating aquatic ecosystems, was investigated in the present study for acute toxicity. Indian major carp (Cirrhinus mrigala) were selected for the bioassay experiments. Experimental fish were subjected to different concentrations of cypermethrin ranging from 0.40 to 6.40μg/l for 96 hrs in test containers. The static renewal test method of acute toxicity test was used. Water temperature was regulated at 26.8 ± 3° C. In addition, behav...
Ichthyofaunal diversity was studied for creek situated in Raigad district of Maharashtra, one of ... more Ichthyofaunal diversity was studied for creek situated in Raigad district of Maharashtra, one of the important district for state in terms of fisheries. In this, creek fishing is mainly done with traditional crafts and gear by Koiliwada community. Total 36 species of fishes belonging to 18 families and 8 orders were recorded of which 2 were Chondrichthyes and 34 species were Osteichthyes. Relatively more diversity in post-monsoon (29 species) seasons than pre-monsoon (20 species) was observed with in monsoon (18 species). Large numbers of juveniles were recorded which could be not identified by traditional method of taxonomy due to their small size. Abundance of fish larvae in the creek show the preference of creek as nursery ground.
The present study was conducted to determine the spatio-temporal variations in surface water qual... more The present study was conducted to determine the spatio-temporal variations in surface water quality at selected locations of Kameng drainage. Water samples were analysed in four different seasons (Premonsoon, Monsoon, Postmonsoon and Winter) at six stations located at various altitudes (Shergaon, Dirang, Sangti, Rupa, Munna Camp and Tenga) during 2018-2019. All the water quality parameters (water temperature (7.7-17 oC), dissolved oxygen (7.1-9.8 mg/l), pH (6.1-7.8), total dissolved solids (1480 ppm), hardness (19-64 mg/l), alkalinity (23-83 mg/l), phosphorus (0.07-0.78 mg/l), ammonium (0.010.55 mg/l), nitrite (0.03-0.83 mg/l), nitrate (0.16-2.85 mg/l) were found within the permissible limit, suitable for development of riverine flora and fauna including fishes.
Aquaculture is the fastest growing food sector but at the same time is faced with several problem... more Aquaculture is the fastest growing food sector but at the same time is faced with several problems such as sudden outbreak of diseases. Treatment of disease with traditional methods involve complications such as development of resistant strain, bioaccumulation, damage to the indigenous beneficial microbes etc. Prevention is better than cure and immune enhancement by stimulation is one of the most efficient strategy to prevent disease outbreak in aquaculture industry. Toll like receptor (TLR) one of the pattern recognition receptors (PRRs), a part of innate immunity activates immune system by recognising pathogen associated molecular pattern (PAMP) the signature molecules of pathogens. These signature molecules are considered to be an essential component for the survival of the pathogen. Therefore, PAMPs are considered to be conserved among a range of pathogens, including virus, bacteria, and, fungi. TLRs recognize various PAMPS in various compartments and trigger immune system by th...
Environmental protection has fascinated the attention of the varied section of people globally th... more Environmental protection has fascinated the attention of the varied section of people globally thereby creating global issue amongst researchers and scientists working in this area. Pesticides are toxic to aquatic biota which form important components of the food chain such as fishes. Fishes are important sources of protein in nation-state’s diet. So a detailed understanding of the pollutant effect on fishes would be rewarding for fish conservation and fishery development. Cypermethrin, a synthetic pyrethroid pesticide and potential toxic pollutant contaminating aquatic ecosystems, was investigated in the present study for acute toxicity. Indian major carp (Cirrhinus mrigala) were selected for the bioassay experiments. Experimental fish were subjected to different concentrations of cypermethrin ranging from 0.40 to 6.40μg/l for 96 hrs in test containers. The static renewal test method of acute toxicity test was used. Water temperature was regulated at 26.8 ± 3° C. In addition, behav...
Ichthyofaunal diversity was studied for creek situated in Raigad district of Maharashtra, one of ... more Ichthyofaunal diversity was studied for creek situated in Raigad district of Maharashtra, one of the important district for state in terms of fisheries. In this, creek fishing is mainly done with traditional crafts and gear by Koiliwada community. Total 36 species of fishes belonging to 18 families and 8 orders were recorded of which 2 were Chondrichthyes and 34 species were Osteichthyes. Relatively more diversity in post-monsoon (29 species) seasons than pre-monsoon (20 species) was observed with in monsoon (18 species). Large numbers of juveniles were recorded which could be not identified by traditional method of taxonomy due to their small size. Abundance of fish larvae in the creek show the preference of creek as nursery ground.
The present study was conducted to determine the spatio-temporal variations in surface water qual... more The present study was conducted to determine the spatio-temporal variations in surface water quality at selected locations of Kameng drainage. Water samples were analysed in four different seasons (Premonsoon, Monsoon, Postmonsoon and Winter) at six stations located at various altitudes (Shergaon, Dirang, Sangti, Rupa, Munna Camp and Tenga) during 2018-2019. All the water quality parameters (water temperature (7.7-17 oC), dissolved oxygen (7.1-9.8 mg/l), pH (6.1-7.8), total dissolved solids (1480 ppm), hardness (19-64 mg/l), alkalinity (23-83 mg/l), phosphorus (0.07-0.78 mg/l), ammonium (0.010.55 mg/l), nitrite (0.03-0.83 mg/l), nitrate (0.16-2.85 mg/l) were found within the permissible limit, suitable for development of riverine flora and fauna including fishes.
Aquaculture is the fastest growing food sector but at the same time is faced with several problem... more Aquaculture is the fastest growing food sector but at the same time is faced with several problems such as sudden outbreak of diseases. Treatment of disease with traditional methods involve complications such as development of resistant strain, bioaccumulation, damage to the indigenous beneficial microbes etc. Prevention is better than cure and immune enhancement by stimulation is one of the most efficient strategy to prevent disease outbreak in aquaculture industry. Toll like receptor (TLR) one of the pattern recognition receptors (PRRs), a part of innate immunity activates immune system by recognising pathogen associated molecular pattern (PAMP) the signature molecules of pathogens. These signature molecules are considered to be an essential component for the survival of the pathogen. Therefore, PAMPs are considered to be conserved among a range of pathogens, including virus, bacteria, and, fungi. TLRs recognize various PAMPS in various compartments and trigger immune system by th...
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