Canciyal Johnson

• M.F.Sc.
• Researcher at Central Inland Fisheries Research Institute

The effect of two hormones HCG and DES on the growth and maturation of the Indian river prawn, Macrobrachium malcolmsonii was evaluated. Juveniles of Macrobrachium malcolmsonii (average weight : 15.50±0.40 g for male and 13.90±0.10 g for female) were fed with prepared pelleted feed (25% protein) by incorporating Human-1 Chorionic Gonadotropin (HCG)...

Tade gray mullet (Chelon planiceps) forms a lucrative fishery in the Hooghly-Matlah estuarine system. During eight months of investigation 232 specimens were examined to study length-weight relationship and relative condition factor (Kn). The length and weight of fish was varied from 41 to 283 mm and 0.81 to 208 g respectively. Two length-weight re...

The conservation issues on hilsa fisheries were examined at selected sites like Godakhali, Diamond Harbour and Kakdwip area under Hooghly-Matlah estuarine system for a period of seven months (June to December 2013). A pretested questionnaire was administered to fisher population contained 35 items such as the status, need of education, awareness le...

Mystus gulio and Mystus cavasius are small indigenous fish species (SIFs) found throughout the year at the various stretches of the river Ganga and contribute significantly to the commercial fishery. The current study was conducted with a total of 609 specimens of M. gulio with a total length ranging from 84 to 190 mm and 377 specimens of M. cavasi...

The Ganges River dolphin (GRD), Platanista gangetica, is one of the most endangered cetaceans in the world and is seriously in danger from dams and barrages, restricted river flows, bycatch, pollution, etc. The GRD is a freshwater dolphin, commonly known as "susu", one of the four freshwater cetacean species in the world. The GRD primarily inhabits...

Nitrate, a highly reactive form of inorganic nitrogen, is commonly found in aquatic environments. Understanding the dynamics of nitrate–N concentration in rivers and its interactions with other water-quality parameters is crucial for effective freshwater ecosystem management. This study uses advanced machine learning models to analyse water quality...

In the current study, the fishery and population dynamics of a prized Gangetic carp, Labeo rohita (Hamilton, 1822), were evaluated using length-frequency data collected monthly from the middle stretches of the Ganga River from April 2017 to December 2019. Using the FiSAT-II software package (FAO-ICLARM Stock Assessment Tools), population parameters...

Fish residing in the aquatic ecosystem are considered the best ecological indicator for monitoring environmental habitat. To evaluate the changes that occurred due to relative restoration in the ecological habitat, a study was conducted in the freshwater zone of the river Ganga between Buxar, Bihar, and Ballia, Uttar Pradesh, between July 2021 and...

Despite continuous efforts, eutrophication is still occurring in freshwater and phosphorus (P) is the most important nutrients that drive the eutrophication in rivers and streams. However, little information is available about the distribution of P fractions in river sediment. Here, the sequential extraction approach was used to evaluate the sedime...

The present report is based on the study carried out at three sampling stations of river Ganga (Buxar, Patna & Bhagalpur) in the middle stretch of river Ganga. Quarterly sampling was carried out, during the years 2018 and 2019. During the study, it was found that significantly higher density (1012-15785 unit/l). Microcystis aeruginosa bloom was rec...

Spatio-temporal dynamics of periphyton community in Estuarine Zones of the Ganga River: Insights from Three-Year study (2021-2023)

In the current study, the fishery and population dynamics of a prized Gangetic carp, Labeo rohita (Hamilton, 1822), were evaluated using length-frequency data collected monthly from the middle stretches of the Ganga River from April 2017 to December 2019. Using the FiSAT-II software package (FAO-ICLARM Stock Assessment Tools), population parameters...

The River Ganga produces a substantial amount of its fish from small native species, defined here as those with a maximum length of 25 cm. The FiSAT program was utilized to estimate stock assessments of four important small indigenous species from the River Ganga: Johnius coitor, Cabdio morar, Salmostoma bacaila, and Gudusia chapra. Fish samples we...

The current study determined Tor putitora (Hamilton, 1822) fshery, growth, mortality, and population characteristics using length-frequency data assembled monthly from the Tehri dam reservoir in Uttarakhand from January to December 2022. The estimation data was separated into 40-mm class intervals, and population parameters were investigated and co...

Climate change associated with anthropogenic stressors is considered the main threat to these wetlands resulting in reduced water connection followed by a decline in ecological functions. This article presents a systemic approach to assess the present ecological status of a subtropical floodplain wetland concerning the fisheries and associated ecos...

Asian leaf fish Nandus nandus (Hamilton, 1822) is a valued small indigenous freshwater fish (SIF) in inland waters with high food, and conservation importance but relatively less studied. We assessed the impact of regional climate variability for the first time on population attributes and breeding phenology and predicted its biological vulnerabili...

The present study aims to understand the spatio-temporal dynamics in habitat ecology and fish assemblage and determine the relationship of habitat transition and fish distribution in a large riverine-reservoir cascade system (Sardar Sarovar Reservoir part in Madhya Pradesh). This study was carried out along a 125-km riverine-reservoir interface (RR...

The 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 abundanc...

Ganga river is one of the important water bodies harbouring different aquatic communities especially sedentary benthic organisms. We determined several macrobenthic molluscan faunas including 24 species comprising of 18 gastropods and 6 bivalves. The maximum species diversity with a value of 2.08 was recorded during monsoon, whereas the species ric...

Wetland fisheries are most vulnerable to climate and anthropogenic change, and therefore, vulnerability assessment is essential for the formulation of prudent management strategies. In the present study, vulnerability assessment was carried out in nine floodplain wetlands from three districts of West Bengal using stakeholder perception and ecologic...

Freshwater riverine systems are facing series of stress due to different anthropogenic activities, eutrophication and geomorphological alterations. Pollution is the current ecological hazard leading to the deterioration in river water quality and thereby modifying the quantitative distribution of the inhabiting organisms. In the present study, four...

The present study aims to understand the spatio-temporal dynamics in habitat ecology and fish assemblage and determine the relationship of habitat transition and fish distribution in a large riverine- reservoir cascade system (Sardar Sarovar Reservoir part in Madhya Pradesh). This study was carried out along a 125 km riverine- reservoir interface d...

In India, large rivers are experiencing serious threat to aquatic biodiversity, and therefore flagship projects are being executed on freshwater biodiversity conservation using various methods and strategies. Ganga River is the largest and longest river of India supporting rich commercial and artisanal fisheries for decades. Periodical and systemat...

Fish assemblage structure in Palair reservoir, a medium tropical reservoir along the river Paleru, a tributary of river Krishna in Southern India, was studied along the spatial gradient of the impoundment. The abundance and assemblage structure of wild fish aggregated around the fish cage units installed in the reservoir were assessed and compared...

River connectivity is often described as a key requirement for maintaining the health and biodiversity of associated wetlands of rivers. A comparative study was undertaken to understand the influence of river connectivity on plankton diversity and abundance in an open (Chharaganga Beel) and a closed wetland (Kalobaur Beel) situated on the banks of...

Quarterly field sampling was conducted from 2016 to 2020 to understand the distribution and current status of IUCN Red-listed fish species along the entire stretch of River Ganga. During the study, 18 fish species belonging to 8 orders and 12 families were recorded under the IUCN Red list. Fishes belonging to the family Synodontidae contributed hig...

The small-scale fisheries sector plays very significant role in Indian fisheries. Fish life history parameters such as growth and morality are considered important factors for their conservation and management. Accordingly, the population parameters of a commercially important freshwater clupeid fish, Gudusia chapra (Hamilton, 1822) of Mathura...

Phytoplankton, the primary producers in an aquatic ecosystem, also act as indicators of pollution by alterations in species composition and population structure. Study on plankton dynamics in relation to environment forms the base of any aquatic ecosystem management. So, a study on the variations in the plankton population influenced by abiotic fac...

The catch pattern of the exotic Common Carp (Cyprinus carpio) and their relationship with water quality along with maturity status of fishes were assessed during 2017-2019 to understand overall establishment and impact of the species in Buxar stretch of River Ganga in West Bihar, India. A total of 64 fish species were recorded including two exotic...

Geographic information system is being applied to various studies to efficiently manage information and project it for decision making and planning purposes. One such application of GIS has been in inland fisheries to inventorize availability and distribution of fish species in river Ganga at selected sampling stations. The stations were distribute...

Length-frequency data of Nile tilapia (Oreochromis niloticus) was studied using 1250 specimens of both sexes combined with maximum length and weight of 44.5 cm (TL) and 1050 g respectively through gill net catch at different landing sites of Halali Reservoir, Madhya Pradesh. The data were grouped into classes of 10-mm intervals and various paramete...

The fish fauna of Kodayar river has been presented here based on an extensive survey and earlier reports. A systematic enumeration of fish fauna comprised 79 species representing eight orders, 23 families and 47 genera. The Kodayar river constitutes about 5.67 % to the endemic fish diversity of Western Ghats of India. Highest species diversity was...

Food and feeding habits of Chelon planiceps was estimated for 232 fishes collected from Kakdweep and Diamond harbor local fish markets and were subjected into analysis for the period of December, 2005 to July, 2006. Such fishes were procured from different areas of Sunderban delta of 24- Paraganas district (S). The results of the study indicated Ch...

Varied marine and estuarine ecosystems of Tamil Nadu endowed with diverse fish fauna. A total of 1656 fish species under two classes, 40 orders, 191 families and 683 geranra reported from marine and estuarine waters of Tamil Nadu. In the checklist, 1075 fish species were primary marine water and remaining 581 species were diadromus. In total, 128 s...

A systematic, updated checklist of freshwater fish species of Tamil Nadu consist of 226 species representing 13 orders, 34 families and 93 genera. The top order with diverse species composition was cypriniformes with 125 species, 39 genera and four families. Cyprinidae contributed 48.89 % to total freshwater fishes of Tamil Nadu. Tamil Nadu constit...

Varied freshwater resources of Orissa blessed with diverse fish fauna. In total, 186 species of fishes belonging to 11 orders, 33 families and 96 genera were recorded from various freshwater bodies of Orissa. Cypriniformes was the most dominant order and Cyprinidae was diverse family. The trophic level of fishes of Orissa ranged from 2.0 to 4.5 con...

Varied freshwater resources of Orissa blessed with diverse fish fauna. In total, 186 species of fishes belonging to 11 orders, 33 families and 96 genera were recorded from various freshwater bodies of Orissa. Cypriniformes was the most dominant order and Cyprinidae was diverse family. The trophic level of fishes of Orissa ranged from 2.0 to 4.5 con...

There are 54 estuarine wetlands known from Tamil Nadu of which 13 estuarine wetlands explored for fish biodiversity assessment. Systematic and updated checklist of estuarine fishes contains 330 species distributed under 205 genera, 95 families, 23 orders and two classes. The most diverse order was perciformes with 175 species, 100 genera and 43 fam...

The information on freshwater fishes of Maharashtra, Madhya Pradesh, Chhattis¬garh and Odisha is scattered in published literature and considering the urgent need of an elaborate account on this subject, an attempt was made to document freshwater fish species found in these states based on the published literature. The systematic position, common n...

The publication "Inland Fish Diversity" reflects restructured information on freshwater fish diversity of Karnataka, Kerala, Tamil Nadu and United Andhra Pradesh along with estuarine fish diversity of Tamil Nadu and Vembanad Lake of Kerala with a note on systematic placement as per the latest taxonomic revisions of fish species, together with their...

In this communication, we documents the first record of the exotic South American suckermouth armoured catfishes (Loricariidae) of the genus Pterygoplichthys spp. from Manimuthar dam on river Tambaraparani in southern Tamil Nadu. Based on morphometric measurements and meristic counts, the specimen was identified as Pterygoplichthys pardalis (Castel...

Cultivable freshwater fishes of Maharashtra comprises of 96 species (58 primary freshwater and 38 diadromus) under six orders, 17 families and 49 genera. Out of 96 species, 30 are endemic to Western Ghats, eight are endemic to India and nine are exotic. Of the 96 species assessed for conservation status two species are critically endangered, ten sp...

The status of finfish and shellfish diversity and seasonal variation in their distribution and abundance were investigated in Vembanad Lake at Kumarakom Region of Kottayam in Kerala. In total 60 species of finfishes and shellfishes belonging to 13 orders, 31 families 43 genera were recorded from the study area.

In the present communication, an attempt has been made to provide a systematic classification of freshwater fishes of West Bengal along with their local names, environment and conservation status, as far as possible. We recognized 267 species of freshwater fishes (186 primary freshwater species, 81 secondary freshwater species), belonging to 12 ord...

Tade gray mullet (Chelon planiceps) forms a lucrative fishery in the Hooghly-Matlah estuarine system. During eight months of investigation 232 specimens were examined to study length-weight relationship and relative condition factor (Kn). The length and weight of fish was varied from 41 to 283 mm and 0.81 to 208 g respectively. Two length-weight re...

An experiment of 90th days duration was conducted to test the efficacy of the fucoidan derived from brown seaweed Padina tetrastromatica as an immunostimulant in Giant freshwater prawn M.rosenbergii. The prawns were fed with the diets containing different concentration of fucoidan viz., 1%, 2% and 3%. The proPhenol Oxidase (proPO) activity and the...

The checklist of the riverine fishes of Karnataka includes 240 species (109 species from Cauvery, 59 species from Godavari, 168 fish species from Krishna and 124 fish species from West flowing river basins) distributed under 102 genera, 38 families and 14 orders. The top three orders with diverse species composition were Cypriniformes (140 species,...

Seaweed diversity assessment at Hare Island in the Gulf of Mannar revealed presence of 99 seaweed species belonging to 15 order, 24 family and 42 genera during May 2014 to April 2015. Recorded species during present study belonged to 3 phylum. Rhodophyceae was dominant seaweed phylum with 35 species belonging to 7 order, 12 family and 20 genera fol...

New species of freshwater fishes recorded for first time during last three decades form India is reviewed. In total 150 new species of freshwater fishes belonging to 5 order, 22 family and 44 genera have been emerged from different locality of India. Cypriniformes was the most dominant order represented by 69 species belonging to 5 family and 17 ge...

Present paper overviews potential implications of the proposed river linking project on aquatic ecosystems. River linking might have positive as well as negative impacts on aquatic ecosystems, such as water quality changes, loss of habitat, alteration in spawning and breeding grounds, effect on fish migration, changes in land-ocean interactions, ef...

The study was conducted to assess the effect of fucoidan (bioactive compound) incorporated diet on growth rate of Macrobrachium rosenbergii. The polysaccharide fucoidan from brown seaweed Padina tetrastromatica was extracted and it was incorporated with pellet diets at three concentrations (1%, 2% and 3%). The fucoidan incorporated diets were fed t...