Cytogenetics is the diagnostic study of chromosomal structure and properties, as well as cell div... more Cytogenetics is the diagnostic study of chromosomal structure and properties, as well as cell division, using a variety of methods, one of which is “karyotyping.” It refers to a method of photographing a stained preparation in which the chromosomes are organised in a uniform pattern. The advent of modern techniques such as “karyotyping” has made it feasible to visualize undetected chromosomal abnormalities such as short chromosome segments and chromosome translocations. Because such techniques enabled each pair of chromosomes to be identified separately, they have further aided our understanding of the chromosomal basis of a certain significant genetic diseases. Every organism has its own unique karyotype, which is defined by its number and shape. Karyotypic variation, on the other hand, occurs in different individuals of the same species, as well as between different species. Monitoring cytogenetic data of economically significant fishes as well as threatened fishes can hold import...
The present investigation included diet composition and feeding habits of sin croaker (Johnius du... more The present investigation included diet composition and feeding habits of sin croaker (Johnius dussumieri) based on the monthly examination of 1031 specimens along Ratnagiri coast of India from December 2009 to November 2011. Results indicate that J. dussumieri is a carnivore feeder and feeds upon narrow range of food items. Crustaceans were identified as most dominant food items followed by teleost fishes, molluscs and planktonic forms like fish egg and Salpa. The species preferably feeds on a marine crustacean i.e. Acetes spp. The feeding intensity of J. dussumieri was found poor during April and September. The analysis of Kendell's coefficient of concordance indicated relatively stronger association (W = 0.64, p < 0.05) of choice of food items with season, while the same did not hold good for different size groups. Therefore, the differential feeding habit was evident among the different size groups. The juveniles preferably feed on crustaceans, while the adults were observed to prefer small teleost fishes. The differences in the diet composition between adults and juveniles indicated the existence of different feeding habitats along the Ratnagiri coast of India.
Induction of triploidy in fishes is widely accepted as the most effective method for producing st... more Induction of triploidy in fishes is widely accepted as the most effective method for producing sterile fish for aquaculture and fisheries management. Triploidy induction refers to the production of individuals with three sets of chromosomes and can be induced in fish by inhibiting the second meiotic division followed by the extrusion of the second polar body by shocking eggs shortly after fertilization using various physical shocks and chemical treatments. Cold shock treatment and heat shock treatment for triploid induction are safe because no chemicals are used. However, these treatments require an optimal treatment temperature to be maintained in a large volume in order to treat a large quantity of eggs. Pressure treatment is also considered to be safe. However, in pressure treatment specific equipments are required and it is usually difficult to treat many eggs on a commercial scale.
African Journal of Agricultural Research, Apr 18, 2013
The rainbow trout (Oncorhynchus mykiss), introduced in Kashmir in 1912, has thrived well since th... more The rainbow trout (Oncorhynchus mykiss), introduced in Kashmir in 1912, has thrived well since then and is now established in almost all the cold water streams, lakes and rivers of the valley. This study was aimed to describe the length-weight relationship and ponderal index (condition factor) of the fish from Dachigam stream in Kashmir. The investigation was carried out between April and December, 2005 and the data were recorded from anaesthetized fish, which ranged from 110 to 488 mm in length and 20 to 1425 g in weight. The length-weight relationship was estimated as LogW =-4.9216 + 2.9618LogL and the b value (2.9618) did not differ significantly from 3. The coefficient of correlation (r) for the lengthweight relationship was estimated at 0.9968 which showed a high degree of positive correlation between the length and weight of the fish. The condition factor (K) value was estimated as 1.15 ± 0.013.
Landmark-based morphometrics are examined to evaluate the population status of Schizopyge niger (... more Landmark-based morphometrics are examined to evaluate the population status of Schizopyge niger (Heckel, 1838) from Dal Lake and Jhelum River. A total of 180 individuals are collected from the two locations, and a truss network is constructed by interconnecting 12 landmarks to yield 30 distance variables that are extracted from digital images of specimens using tpsDig2 and PAST software. Transformed truss measurements are subjected to Principal Component Analysis (PCA), where the first component explains 78.43% of total variance, while the second and third components explain 4.62 and 2.91% of total variance respectively. The high component loadings are from the characters which mostly contribute to anterior half of body depth, middle portion of body depth, and head region. The bivariate plot of PC1 and PC2 clearly indicates the separation of the two populations. The cross validation of this analysis reveals that the percentage of correctly classified fishes is 100% both in Dal Lake as well as Jhelum River.
Tasaduq H. Shah*, S.K. Chakraborty, Tarkeshwar Kumar, R.K. Sadawarte, & Sandhya K.M. 3 Faculty of... more Tasaduq H. Shah*, S.K. Chakraborty, Tarkeshwar Kumar, R.K. Sadawarte, & Sandhya K.M. 3 Faculty of Fisheries, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Kashmir (J&K) Division of Livestock and Fisheries Management, ICAR-Research Complex for Eastern Region, Patna, Bihar, India Central Institute of Fisheries Education, Versova, Andheri (West), Mumbai, Maharashtra, India College of Fisheries, DBSK Krishi Vidyapeeth, Ratnagiri, Maharashtra, India [E-mail: [email protected]]
This study investigated the biochemical composition of milt of the snow trout Schizothorax niger ... more This study investigated the biochemical composition of milt of the snow trout Schizothorax niger in response to different doses of synthetic breeding hormone WOVA-FH. Five biochemical parameters which include glucose, triglycerides, cholesterol, total protein and urea were studied. Fishes were divided into 5 treatment groups and a control group and injected with the hormone @ 0.1, 0.2, 0.3, 0.4 and 0.5 ml Kg body weight. Control was injected with propylene glycol. The results showed a significant rise in the levels of cholesterol, triglycerides and protein in all hormone treated groups where as a significant decrease in urea concentration was observed with the increasing dose of hormone. Glucose only showed a significant increase in groups treated with higher doses of hormone (T3, T4 and T5).
Tasaduq Hussain Shah*, Sushanta Kumar Chakraborty, Ashok Kumar Jaiswar, Tarkeshwar Kumar, Kavitha... more Tasaduq Hussain Shah*, Sushanta Kumar Chakraborty, Ashok Kumar Jaiswar, Tarkeshwar Kumar, Kavitha Mandhir Sandhya, & Rahul Sadawarte Faculty of Fisheries, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, Ganderbal, Jammu and Kashmir, India Central Institute of Fisheries Education (Deemed University), Indian Council of Agricultural Research, Panch Marg, Off Yari Road, Versova Andheri (West), Mumbai, Maharashtra, India
The study is based on the estimation of absolute fecundity and relative fecundity of rainbow trou... more The study is based on the estimation of absolute fecundity and relative fecundity of rainbow trout (Oncorhynchus mykiss) collected from three stateowned trout farms namely Mammar Trout Farm, Dachigam Trout Farm and Achabal Trout Farm. The highest value of absolute fecundity was estimated at 2600 eggs for a fish of 269 mm total length (239.50g) with a gonad length of 135 mm (45.5g) and the lowest value obtained was 1204 eggs for a fish of 273 mm total length (252.00g) and gonad length of 90 mm (14.5g). The relative fecundity ranged between 3.502 to 10.855 per gram of body weight. The mean±SD value of absolute fecundity and relative fecundity recorded were 1746.38±377.86, and 5.86±186, respectively. The scattergram between fecundity against fish weight, fish length, gonad weight and gonad length revealed positive relationship with R² value of 0.599, 0.704, 0.662, 0.559, respectively.
Sin Croacker, Johnieops sina (Cuvier, 1830) is one of the commercially important and common demer... more Sin Croacker, Johnieops sina (Cuvier, 1830) is one of the commercially important and common demersal fish in the coastal waters of Ratnagiri along southern Maharashtra, India. In the context of local demand and economic importance, the gonadal maturation profile and fecundity of J. sina has been studied. Spent, mature and maturing females were recorded in almost all months of the year suggesting the multiple and prolonged breeding behaviour. Result also indicated marginal dominance of males over females except September (1:0.49), where significant predominance of male was observed at 5% level of significant. Absolute fecundity ranged from 24,800 to 126,880 eggs (average: 83,313) from the ovary weighing between 1.28 to 5.2 g. Monthly changes in the Gonado-somatic and Hepato-somatic Index (GSI & HSI) also revealed it’s prolong spawning with two peaks; the first peak in SeptemberNovember and the second in February-April, which indicates J. sina spawn twice in a year. Females of the spe...
The present study was carried out to calculate the length-weight relationship and condition facto... more The present study was carried out to calculate the length-weight relationship and condition factor of Cyprinus carpio var. communis and Schizothorax niger. A total of 360 samples each of C. carpio var. communis and S. niger were collected from Dal lake from August 2018 to July 2019. Length-weight relationship of C. carpio var. communis and S. niger bothindicates negative allometric growth. The functional form of Length-weight relationship of C. carpio was fitted as Log W = -3.984+2.615 Log L (Pooled), Log W = -3.754 +2.516 Log L (Male) and Log W = -4.162+2.692 Log L (Female) while for S. nigerLength-weight relationship was established as Log W = -3.577+2.399 Log L (Pooled), Log W = -3.644 +2.424 Log L (Male) and Log W = -4.162+2.692 Log L (Female) . The value of growth coefficient (b) for pooled data was found to be greater for C. carpio (2.615) than that of S. niger (2.399) which indicates better growth in C. carpio as compared to S. niger. The value of the condition factor (K) of ...
The present report on food and feeding habits of Otolithes cuvieri is based on the examination of... more The present report on food and feeding habits of Otolithes cuvieri is based on the examination of gut contents of 781 fishes within the size range of 83-300 mm collected from Ratnagiri, Maharashtra. Based on index of relative importance values, crustaceans like Acetes spp. and penaeid prawns were found to be the dominant food items followed by fishes, cephalopods and gastropods. Crustaceans were predominant in most of the months. Fishes of smaller lengths preferred only Acetes spp. Dominance of empty stomachs in most of the months as well as in different size groups indicates low feeding intensity of the species.
Morhological characteristics of the indigenous snow trout, Schizothoraxcurvifrons from Dal Lake K... more Morhological characteristics of the indigenous snow trout, Schizothoraxcurvifrons from Dal Lake Kashmir were analyzed using 11 morphometric and 5 meristic characters. The various morphometric characters compared showed high co-efficient of correlation (r) values, indicating that the characters were highly correlated to each other, thereby signifying homogeneity within the population. Based on the analysis of meristic characters, the fin formula of S. curvifrons can be written was found as D8–9 Pel8–11 P15–20 A6–7 C17–21.
Cytogenetics is the diagnostic study of chromosomal structure and properties, as well as cell div... more Cytogenetics is the diagnostic study of chromosomal structure and properties, as well as cell division, using a variety of methods, one of which is “karyotyping.” It refers to a method of photographing a stained preparation in which the chromosomes are organised in a uniform pattern. The advent of modern techniques such as “karyotyping” has made it feasible to visualize undetected chromosomal abnormalities such as short chromosome segments and chromosome translocations. Because such techniques enabled each pair of chromosomes to be identified separately, they have further aided our understanding of the chromosomal basis of a certain significant genetic diseases. Every organism has its own unique karyotype, which is defined by its number and shape. Karyotypic variation, on the other hand, occurs in different individuals of the same species, as well as between different species. Monitoring cytogenetic data of economically significant fishes as well as threatened fishes can hold import...
The present investigation included diet composition and feeding habits of sin croaker (Johnius du... more The present investigation included diet composition and feeding habits of sin croaker (Johnius dussumieri) based on the monthly examination of 1031 specimens along Ratnagiri coast of India from December 2009 to November 2011. Results indicate that J. dussumieri is a carnivore feeder and feeds upon narrow range of food items. Crustaceans were identified as most dominant food items followed by teleost fishes, molluscs and planktonic forms like fish egg and Salpa. The species preferably feeds on a marine crustacean i.e. Acetes spp. The feeding intensity of J. dussumieri was found poor during April and September. The analysis of Kendell's coefficient of concordance indicated relatively stronger association (W = 0.64, p < 0.05) of choice of food items with season, while the same did not hold good for different size groups. Therefore, the differential feeding habit was evident among the different size groups. The juveniles preferably feed on crustaceans, while the adults were observed to prefer small teleost fishes. The differences in the diet composition between adults and juveniles indicated the existence of different feeding habitats along the Ratnagiri coast of India.
Induction of triploidy in fishes is widely accepted as the most effective method for producing st... more Induction of triploidy in fishes is widely accepted as the most effective method for producing sterile fish for aquaculture and fisheries management. Triploidy induction refers to the production of individuals with three sets of chromosomes and can be induced in fish by inhibiting the second meiotic division followed by the extrusion of the second polar body by shocking eggs shortly after fertilization using various physical shocks and chemical treatments. Cold shock treatment and heat shock treatment for triploid induction are safe because no chemicals are used. However, these treatments require an optimal treatment temperature to be maintained in a large volume in order to treat a large quantity of eggs. Pressure treatment is also considered to be safe. However, in pressure treatment specific equipments are required and it is usually difficult to treat many eggs on a commercial scale.
African Journal of Agricultural Research, Apr 18, 2013
The rainbow trout (Oncorhynchus mykiss), introduced in Kashmir in 1912, has thrived well since th... more The rainbow trout (Oncorhynchus mykiss), introduced in Kashmir in 1912, has thrived well since then and is now established in almost all the cold water streams, lakes and rivers of the valley. This study was aimed to describe the length-weight relationship and ponderal index (condition factor) of the fish from Dachigam stream in Kashmir. The investigation was carried out between April and December, 2005 and the data were recorded from anaesthetized fish, which ranged from 110 to 488 mm in length and 20 to 1425 g in weight. The length-weight relationship was estimated as LogW =-4.9216 + 2.9618LogL and the b value (2.9618) did not differ significantly from 3. The coefficient of correlation (r) for the lengthweight relationship was estimated at 0.9968 which showed a high degree of positive correlation between the length and weight of the fish. The condition factor (K) value was estimated as 1.15 ± 0.013.
Landmark-based morphometrics are examined to evaluate the population status of Schizopyge niger (... more Landmark-based morphometrics are examined to evaluate the population status of Schizopyge niger (Heckel, 1838) from Dal Lake and Jhelum River. A total of 180 individuals are collected from the two locations, and a truss network is constructed by interconnecting 12 landmarks to yield 30 distance variables that are extracted from digital images of specimens using tpsDig2 and PAST software. Transformed truss measurements are subjected to Principal Component Analysis (PCA), where the first component explains 78.43% of total variance, while the second and third components explain 4.62 and 2.91% of total variance respectively. The high component loadings are from the characters which mostly contribute to anterior half of body depth, middle portion of body depth, and head region. The bivariate plot of PC1 and PC2 clearly indicates the separation of the two populations. The cross validation of this analysis reveals that the percentage of correctly classified fishes is 100% both in Dal Lake as well as Jhelum River.
Tasaduq H. Shah*, S.K. Chakraborty, Tarkeshwar Kumar, R.K. Sadawarte, & Sandhya K.M. 3 Faculty of... more Tasaduq H. Shah*, S.K. Chakraborty, Tarkeshwar Kumar, R.K. Sadawarte, & Sandhya K.M. 3 Faculty of Fisheries, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Kashmir (J&K) Division of Livestock and Fisheries Management, ICAR-Research Complex for Eastern Region, Patna, Bihar, India Central Institute of Fisheries Education, Versova, Andheri (West), Mumbai, Maharashtra, India College of Fisheries, DBSK Krishi Vidyapeeth, Ratnagiri, Maharashtra, India [E-mail: [email protected]]
This study investigated the biochemical composition of milt of the snow trout Schizothorax niger ... more This study investigated the biochemical composition of milt of the snow trout Schizothorax niger in response to different doses of synthetic breeding hormone WOVA-FH. Five biochemical parameters which include glucose, triglycerides, cholesterol, total protein and urea were studied. Fishes were divided into 5 treatment groups and a control group and injected with the hormone @ 0.1, 0.2, 0.3, 0.4 and 0.5 ml Kg body weight. Control was injected with propylene glycol. The results showed a significant rise in the levels of cholesterol, triglycerides and protein in all hormone treated groups where as a significant decrease in urea concentration was observed with the increasing dose of hormone. Glucose only showed a significant increase in groups treated with higher doses of hormone (T3, T4 and T5).
Tasaduq Hussain Shah*, Sushanta Kumar Chakraborty, Ashok Kumar Jaiswar, Tarkeshwar Kumar, Kavitha... more Tasaduq Hussain Shah*, Sushanta Kumar Chakraborty, Ashok Kumar Jaiswar, Tarkeshwar Kumar, Kavitha Mandhir Sandhya, & Rahul Sadawarte Faculty of Fisheries, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Rangil, Ganderbal, Jammu and Kashmir, India Central Institute of Fisheries Education (Deemed University), Indian Council of Agricultural Research, Panch Marg, Off Yari Road, Versova Andheri (West), Mumbai, Maharashtra, India
The study is based on the estimation of absolute fecundity and relative fecundity of rainbow trou... more The study is based on the estimation of absolute fecundity and relative fecundity of rainbow trout (Oncorhynchus mykiss) collected from three stateowned trout farms namely Mammar Trout Farm, Dachigam Trout Farm and Achabal Trout Farm. The highest value of absolute fecundity was estimated at 2600 eggs for a fish of 269 mm total length (239.50g) with a gonad length of 135 mm (45.5g) and the lowest value obtained was 1204 eggs for a fish of 273 mm total length (252.00g) and gonad length of 90 mm (14.5g). The relative fecundity ranged between 3.502 to 10.855 per gram of body weight. The mean±SD value of absolute fecundity and relative fecundity recorded were 1746.38±377.86, and 5.86±186, respectively. The scattergram between fecundity against fish weight, fish length, gonad weight and gonad length revealed positive relationship with R² value of 0.599, 0.704, 0.662, 0.559, respectively.
Sin Croacker, Johnieops sina (Cuvier, 1830) is one of the commercially important and common demer... more Sin Croacker, Johnieops sina (Cuvier, 1830) is one of the commercially important and common demersal fish in the coastal waters of Ratnagiri along southern Maharashtra, India. In the context of local demand and economic importance, the gonadal maturation profile and fecundity of J. sina has been studied. Spent, mature and maturing females were recorded in almost all months of the year suggesting the multiple and prolonged breeding behaviour. Result also indicated marginal dominance of males over females except September (1:0.49), where significant predominance of male was observed at 5% level of significant. Absolute fecundity ranged from 24,800 to 126,880 eggs (average: 83,313) from the ovary weighing between 1.28 to 5.2 g. Monthly changes in the Gonado-somatic and Hepato-somatic Index (GSI & HSI) also revealed it’s prolong spawning with two peaks; the first peak in SeptemberNovember and the second in February-April, which indicates J. sina spawn twice in a year. Females of the spe...
The present study was carried out to calculate the length-weight relationship and condition facto... more The present study was carried out to calculate the length-weight relationship and condition factor of Cyprinus carpio var. communis and Schizothorax niger. A total of 360 samples each of C. carpio var. communis and S. niger were collected from Dal lake from August 2018 to July 2019. Length-weight relationship of C. carpio var. communis and S. niger bothindicates negative allometric growth. The functional form of Length-weight relationship of C. carpio was fitted as Log W = -3.984+2.615 Log L (Pooled), Log W = -3.754 +2.516 Log L (Male) and Log W = -4.162+2.692 Log L (Female) while for S. nigerLength-weight relationship was established as Log W = -3.577+2.399 Log L (Pooled), Log W = -3.644 +2.424 Log L (Male) and Log W = -4.162+2.692 Log L (Female) . The value of growth coefficient (b) for pooled data was found to be greater for C. carpio (2.615) than that of S. niger (2.399) which indicates better growth in C. carpio as compared to S. niger. The value of the condition factor (K) of ...
The present report on food and feeding habits of Otolithes cuvieri is based on the examination of... more The present report on food and feeding habits of Otolithes cuvieri is based on the examination of gut contents of 781 fishes within the size range of 83-300 mm collected from Ratnagiri, Maharashtra. Based on index of relative importance values, crustaceans like Acetes spp. and penaeid prawns were found to be the dominant food items followed by fishes, cephalopods and gastropods. Crustaceans were predominant in most of the months. Fishes of smaller lengths preferred only Acetes spp. Dominance of empty stomachs in most of the months as well as in different size groups indicates low feeding intensity of the species.
Morhological characteristics of the indigenous snow trout, Schizothoraxcurvifrons from Dal Lake K... more Morhological characteristics of the indigenous snow trout, Schizothoraxcurvifrons from Dal Lake Kashmir were analyzed using 11 morphometric and 5 meristic characters. The various morphometric characters compared showed high co-efficient of correlation (r) values, indicating that the characters were highly correlated to each other, thereby signifying homogeneity within the population. Based on the analysis of meristic characters, the fin formula of S. curvifrons can be written was found as D8–9 Pel8–11 P15–20 A6–7 C17–21.
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