Not Available

Not AvailableA metacercarial infection of Posthodiplostomum sp. (Strigeidida: Diplostomidae) was reported in the cyprinid fish, Labeo catla and Pethia conchonius and was identified based on clinical signs, cyst morphometry and characteristic histopathological lesions. The parasite was oval-round in shape, encysted in musculocutaneoustissues, and well encapsulated. The cyst was 1.02±0.02 by 0.79±0.02 mm and 1.02±0.02 by 0.75±0.02 mm in L. catla and P. conchonius, respectively. Microscopically, the multifocal hyperpigmented areas in the musculocutaneous tissues showed pericystic melanization, focal necrosis, and an infiltration of mononuclear leukocytes. Out of the 5,820 freshwater fish examined, only 3 L. catla were found to be infected in October at the Balagarh and in August, 13 P. conchonius were found to be infected at the Farakka stretch of the Ganga River. The spatio-temporal prevalence of Posthodiplostomum sp. in L. catla and P. conchonius was <1%, indicating a lower infection rate. This is the first report of Posthodiplostomum sp. infection in P. conchonius and from the Ganga River. It is also the first report of Posthodiplostomum sp. infection in L. catla in the Ganga RiverNot Availabl

Not Available

Not AvailableNot AvailableNot Availabl

Not Available

Not AvailableThe pattern of spatial fish assemblage, diversity, habitat, and potential impact of Nile tilapia (Oreochromis niloticus) was studied in a tropical reservoir of central India during June 2018–July 2019. A total of 21 species under six orders nine families and 18 genera were recorded which is comparatively low than previous records. The fish abundance similarity showed a maximum similarity of 78% between site 1 and site 3 clusters. The results of species composition showed increased abundance of O. niloticus species (> 80%) in the fishery and have now established feral population in the reservoir. The mean Simpson dominance index (1 − λ), the Shannon diversity index (H′), Pielou's evenness index (J′) and Margalef's richness index (d) were determined for three different sites followed by Mann–Whitney U test which showed a significant difference at spatial scale. Bray–Curtis cluster analysis of physicochemical parameters showed a similarity of 96% between site 1 and site 2. Comparison with the previous study three physicochemical parameters (total alkalinity, total hardness and chloride) showed the considerable changes. Relationships between fish assemblages and environmental parameters were examined by canonical correspondence analysis (CCA). Six physicochemical parameters (i.e., DO, pH, Nitrate, Mg, Phosphate and Silicate) showed statistically significant to shaping fish diversity (p)Not Availabl

Not Available

Not AvailablePrawn and crab fisheries in Tapti River – A peninsular river, India.Not Availabl

Not Available

Not AvailableNot AvailableNot Availabl

Not Available

Not AvailableThe geographic information systems (GIS) play an important role in all geospatial aspects of assessment, monitoring, and management of inland open water resources for strategic development in the fsheries sector. In India, reservoir fsheries development is one of the fagship programme and several initiatives have been taken up towards enhancement and sustainable development. The present study investigates spatio-temporal changes in ecology and fsheries in Hirakud reservoir, Odisha, build across river Mahanadi which features one of the largest dams in South Asia during 2016–17 to 2018–19. The reservoir is mainly utilized for electricity generation, irrigation and ofers tremendous scope to support fsheries and livelihood. The mean water spread area during 2016–17 to 2018–19 was at the minimum (42721 ha) during premonsoon period and was at the maximum (62059 ha) during monsoon. Most of the water quality parameters including nitrate, BOD, and alkalinity during 2016–17 to 2018–19 were higher in the premonsoon period and overall, the parameters were under favorable range for fsheries. The present investigation from the fsh landing sites of the reservoir, recorded merely 40 fsh species, indicating loss of fsh diversity as compared to the historical reports. The IUCN conservation status showed that among the 40 species only one species, Wallago attu is under the VU category and 4 species Chitala chitala, Ompok bimaculatus, Ailia colia, and Bagarius bagarius are under the NT category. The fsh production in the reservoir was 8200 t during 2018–19. The analysis of time series annual fsh catch data using the ARIMA model forecasted the increasing trend of fsh production. The water quality parameters were presented in the GIS platform for a better understanding of the spatial variations over time. Habitat protection of fsh breeding grounds, closed seasons, mesh size regulations, scientifc management, and community participation are recommended as the measures for conservation of fish diversity and sustainable enhancement of fsh production in the reservoirNot Availabl

Not Available

Not AvailableIril River is a principal tributary of Imphal River and so far, there are few studies on assessment of impact of anthropogenic activities on the river. In this context, a study was undertaken to study perception of local fishers as regards to impact of anthropogenic activities on fish diversity of Iril River. Four sampling sites viz. Dolaithabi, Tiger-camp, Top Khewa Bazar and Lilong were selected across two districts, Imphal-East and Thoubal. Perceptions of respondents (N=60) with respect to impact of anthropogenic activities on fish biodiversity was scored on a Likert scale where they indicated their level of agreement to statements on a 5 point scale. It was found that most anthropogenic activities in river as well catchment area were perceived to have negative impact on fish diversity. Average score of anthropogenic activities was 2.4/5, which is categorised as negative impact. Among the anthropogenic activities fishing methods were perceived as having very high negative impact on fish diversity with a weighted average score of 1.81. Kendall's coefficient of concordance (W) which expresses degree of agreement among respondents was found to be 0.63, suggesting that respondents applied same standards in scoring. It was found that anthropogenic activities have adverse impacts on fish biodiversity.Manipur,anthropogenic, impa

Not Available

Not AvailableIn the present communication, an attempt has been made to review the ichthyofaunal diversity of the important Indian rivers such as Ganga, Brahmaputra, Mahanadi, Godavari, Krishna, Cauvery, Tapti, Narmada, Yamuna, etc. Secondary data in the form of research articles, technical reports, technical bulletins, books, etc., were reviewed, bulk of which were published by ICAR-CIFRI and a few other institutions. Among these rivers, the fish diversity of the Yamuna, the Gandak, the Kathajodi, and the Tons (Tamas) have been studied for the first time by ICAR-CIFRI. River Ganga was the most frequently studied river while the ichthyofaunal studies of the river Tapti was done in a gap of over 50 years. Similarly, the entire stretch of the river Cauvery was studied after a gap of 28 years. The study highlights the need to explore fish fauna of the whole stretches of the major rivers of India at regular intervals to build a comparable database that might be utilized by the stakeholders for research, planning and management activities.Not Availabl

Not Available

Not AvailableIn the present communication, an attempt has been made to review the ichthyofaunal diversity of the important Indian rivers such as Ganga, Brahmaputra, Mahanadi, Godavari, Krishna, Cauvery, Tapti, Narmada, Yamuna, etc. Secondary data in the form of research articles, technical reports, technical bulletins, books, etc., were reviewed, bulk of which were published by ICAR-CIFRI and a few other institutions. Among these rivers, the fish diversity of the Yamuna, the Gandak, the Kathajodi, and the Tons (Tamas) have been studied for the first time by ICAR-CIFRI. River Ganga was the most frequently studied river while the ichthyofaunal studies of the river Tapti was done in a gap of over 50 years. Similarly, the entire stretch of the river Cauvery was studied after a gap of 28 years. The study highlights the need to explore fish fauna of the whole stretches of the major rivers of India at regular intervals to build a comparable database that might be utilized by the stakeholders for research, planning and management activities.Not Availabl

Not Available

Not AvailableTen indigenous freshwater fish species belonging to nine genera and seven families were collected from Gandak River, Bihar, India during December, 2014 to September, 2016. Fishes were caught using Cast nets, Gill nets, Drag nets with mesh size of 15–20 mm, 25–30 mm and 5–10 mm respectively along with Traps. Sampling was done during dry and wet seasons and a total of 682 fish were collected for analysis of their Length–Weight Relationships (LWRs). Analyses included seven species for which no previous LWRs information were available in FishBase, and new maximum lengths were recorded for three species.Not Availabl