Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.126949-12
V. Chandrasekar, Nikita Gopal, V. Geethalakshmi, A. K. Mohanty, A. Vidhyavathi, M. Thilagavathi
Gillnet is the most widely followed selective and passive fishing gear system in all water bodies, especially in the traditionalfishing sector. Many past studies on gillnet fishing in the Vembanad Lake, Kerala, South India focussed on speciesavailability and gear-wise catch of major fishes and showed that there was a significant reduction in the fish catch.Thepresent study used market-based valuation method to estimate economic value generated through gillnet fishing operationin selected village panchayats spreading across three districts viz., Ernakulum, Alappuzha and Kottayam, bordering theVembanad Lake, during the period in 2019-20. The species-wise quantity and value of finfishes and shellfishes caught inthe gillnets from Vembanad Lake, in the three districts were analysed during the survey period. The total number of gillnetfishers living around the Vembanad Lake is about 6157 and the catch was estimated at 4645.97 t of both finfish and shellfishspecies, out of which shrimps formed around 72%. The maximum quantity of catch was observed for catfishes (Arius spp.)at 278.6 t per annum, which fetched a value ₹4.46 crores, followed by Etroplus maculatus at 149 t (₹3.58 crores in valueterms). The economic value generated through gillnet fishing is estimated at ₹57.94 crores. Keywords: Economic value, Gillnet fishing, Market price method, Vembanad Lake
{"title":"Economic valuation of gillnet fishing in Vembanad Lake, Kerala, South India, using market price approach","authors":"V. Chandrasekar, Nikita Gopal, V. Geethalakshmi, A. K. Mohanty, A. Vidhyavathi, M. Thilagavathi","doi":"10.21077/ijf.2022.69.4.126949-12","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.126949-12","url":null,"abstract":" Gillnet is the most widely followed selective and passive fishing gear system in all water bodies, especially in the traditionalfishing sector. Many past studies on gillnet fishing in the Vembanad Lake, Kerala, South India focussed on speciesavailability and gear-wise catch of major fishes and showed that there was a significant reduction in the fish catch.Thepresent study used market-based valuation method to estimate economic value generated through gillnet fishing operationin selected village panchayats spreading across three districts viz., Ernakulum, Alappuzha and Kottayam, bordering theVembanad Lake, during the period in 2019-20. The species-wise quantity and value of finfishes and shellfishes caught inthe gillnets from Vembanad Lake, in the three districts were analysed during the survey period. The total number of gillnetfishers living around the Vembanad Lake is about 6157 and the catch was estimated at 4645.97 t of both finfish and shellfishspecies, out of which shrimps formed around 72%. The maximum quantity of catch was observed for catfishes (Arius spp.)at 278.6 t per annum, which fetched a value ₹4.46 crores, followed by Etroplus maculatus at 149 t (₹3.58 crores in valueterms). The economic value generated through gillnet fishing is estimated at ₹57.94 crores.\u0000Keywords: Economic value, Gillnet fishing, Market price method, Vembanad Lake","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46528142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.125074-20
D. Sarma, Dinesh Mohan, Ravindra Posti, Mukul Arya, Parvaiz Ahmad Ganie
Mahseers belonging to genus Tor, Neolissochilus and Naziritor, comprise important groups of food and sport fishes in thefreshwater eco-systems. Tor mahseers being potential game fish are recognised as cultural icon in the pristine waters acrossthe globe. They also have high nutritional value with high content of DHA, EPA and amino acids which are important tohuman health. Presently, 17 species of Tor, 25 species of Neolissochilus and 2 species of Naziritor have been reported andvalidated throughout the world. However, due to several anthropogenic and natural activities, their population is dwindlingacross most of the natural ecosystems and IUCN has categorised the group as endangered. Change in temperature andmonsoon floods triggers the act of migration and spawning behaviour of mahseers in their respective ecological conditions.There are 47 species of mahseers in the world, out of which India harbours fifteen species. These species widely occur in therocky and pristine fast flowing streams of India, China, Nepal, Sri Lanka, Myanmar, Malaysia, Thailand, Vietnam, Pakistanand Bangladesh. The present paper embodies the status of mahseers under the genera Tor, Neolissochilus and Naziritorto understand this magnificent group of fishes having extraordinary importance in terms of balancing aquatic biodiversitysustainability, creating opportunities for increasing livelihood though utilising this fish in sports (angling and ecotourism)and draws immediate attention for its conservation in inclusive and responsible manner. Keywords: Conservation, Ecotourism, GIS, Mahseer, Resource mapping
{"title":"The mighty mahseers of the genera Tor, Neolissochilus and Naziritor: A review on resource distribution, biology, ecotourism and conservation","authors":"D. Sarma, Dinesh Mohan, Ravindra Posti, Mukul Arya, Parvaiz Ahmad Ganie","doi":"10.21077/ijf.2022.69.4.125074-20","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.125074-20","url":null,"abstract":" Mahseers belonging to genus Tor, Neolissochilus and Naziritor, comprise important groups of food and sport fishes in thefreshwater eco-systems. Tor mahseers being potential game fish are recognised as cultural icon in the pristine waters acrossthe globe. They also have high nutritional value with high content of DHA, EPA and amino acids which are important tohuman health. Presently, 17 species of Tor, 25 species of Neolissochilus and 2 species of Naziritor have been reported andvalidated throughout the world. However, due to several anthropogenic and natural activities, their population is dwindlingacross most of the natural ecosystems and IUCN has categorised the group as endangered. Change in temperature andmonsoon floods triggers the act of migration and spawning behaviour of mahseers in their respective ecological conditions.There are 47 species of mahseers in the world, out of which India harbours fifteen species. These species widely occur in therocky and pristine fast flowing streams of India, China, Nepal, Sri Lanka, Myanmar, Malaysia, Thailand, Vietnam, Pakistanand Bangladesh. The present paper embodies the status of mahseers under the genera Tor, Neolissochilus and Naziritorto understand this magnificent group of fishes having extraordinary importance in terms of balancing aquatic biodiversitysustainability, creating opportunities for increasing livelihood though utilising this fish in sports (angling and ecotourism)and draws immediate attention for its conservation in inclusive and responsible manner.\u0000Keywords: Conservation, Ecotourism, GIS, Mahseer, Resource mapping","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48022745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.108857-16
Z. Alam, Karen Avena, Lorenzo Sales, Denise Suemith, Riane UY
In the present study, attempts were made to optimise water spinach (Ipomoea aquatica) in combination with freshwater prawns (Macrobrachium rosenbergii) to be grown under aquaponics culture conditions, especially as an indoor set-up suitable for urban dwellings. A comparison of the morphometric parameters such as linear growth and number of leaves of plants and the survival rate under the soil, aquaponics, aquarium and hydroponics units simultaneously per cycle was done to establish the stability of the system. The water spinach grown under the aquaponics set-up showed significant growth compared to the hydroponics set-up but was less than that of the soil units. Significantly higher growth of freshwater prawns was also recorded in the aquaponics unit compared to the aquarium unit. Though further investigations are still needed to find factors that can give optimum produce, the researchers propose that standardised aquaponic units for water spinach and freshwater prawns can be a safe option for urban households as a sustainable farming practice. Keywords: Food security, Hydroculture, Symbiotic growth, Urban farming
{"title":"Growth performance of water spinach Ipomoea aquatica and freshwater prawn Macrobrachium rosenbergii grown in aquaponic and hydroponic units","authors":"Z. Alam, Karen Avena, Lorenzo Sales, Denise Suemith, Riane UY","doi":"10.21077/ijf.2022.69.4.108857-16","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.108857-16","url":null,"abstract":"In the present study, attempts were made to optimise water spinach (Ipomoea aquatica) in combination with freshwater prawns (Macrobrachium rosenbergii) to be grown under aquaponics culture conditions, especially as an indoor set-up suitable for urban dwellings. A comparison of the morphometric parameters such as linear growth and number of leaves of plants and the survival rate under the soil, aquaponics, aquarium and hydroponics units simultaneously per cycle was done to establish the stability of the system. The water spinach grown under the aquaponics set-up showed significant growth compared to the hydroponics set-up but was less than that of the soil units. Significantly higher growth of freshwater prawns was also recorded in the aquaponics unit compared to the aquarium unit. Though further investigations are still needed to find factors that can give optimum produce, the researchers propose that standardised aquaponic units for water spinach and freshwater prawns can be a safe option for urban households as a sustainable farming practice.\u0000Keywords: Food security, Hydroculture, Symbiotic growth, Urban farming","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45451892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.118663-01
A. P. Dineshbabu, P. T. Sarada, G. Maheswarudu, S. L. Pillai, G. Dash, Indira Divipala, Rajan Kumar, R. Chakraborty, M. Rajkumar, J. Jayasankar, R. Ratheeshkumar, K. N. Saleela, Josileen Jose
Population dynamics of the brown shrimp Metapenaeus monoceros (Fabricius, 1798) was studied along the Indian coast using catch and effort data of trawlers from 8 States and 2 Union Territories for the period 2007-2015. Classical length-based stock assessment methods and spatial database of the shrimp catch were used to derive fishing ground related conclusions. Inclusion of spatial data revealed the possibility of existence of metapopulations of M. monoceros in the region. Maximum sustainable yield (MSY) cannot be a reasonable reference point for deciding the fishing pressure in M. monoceros. By analysing stock fluctuations noticed during the study period with varying spawning stock biomass combinations, retention of 40% spawning biomass seems to be a safe option for sustaining M. monoceros production from Indian waters. Based on this, the study recommends reduction of fishing pressure along north-west, south-west and northeast coast by 70, 60 and 70% respectively from the base level of effort in 2017. The study illustrates that the spatial data from fishing ground, can serve as an additional tool to derive management options. The study also emphasises the need for further investigations on the possibilities of metapopulations of M. monoceros which is widely distributed in all agro-climatic zones along the Indian coast. Keywords: Indian coast, Metapopulation, M. monoceros, Spatial study, Stock assessment
{"title":"Population dynamics of the geographically defined metapopulations of brown shrimp Metapenaeus monoceros (Fabricius, 1798) from Indian waters","authors":"A. P. Dineshbabu, P. T. Sarada, G. Maheswarudu, S. L. Pillai, G. Dash, Indira Divipala, Rajan Kumar, R. Chakraborty, M. Rajkumar, J. Jayasankar, R. Ratheeshkumar, K. N. Saleela, Josileen Jose","doi":"10.21077/ijf.2022.69.4.118663-01","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.118663-01","url":null,"abstract":"Population dynamics of the brown shrimp Metapenaeus monoceros (Fabricius, 1798) was studied along the Indian coast using catch and effort data of trawlers from 8 States and 2 Union Territories for the period 2007-2015. Classical length-based stock assessment methods and spatial database of the shrimp catch were used to derive fishing ground related conclusions. Inclusion of spatial data revealed the possibility of existence of metapopulations of M. monoceros in the region. Maximum sustainable yield (MSY) cannot be a reasonable reference point for deciding the fishing pressure in M. monoceros. By analysing stock fluctuations noticed during the study period with varying spawning stock biomass combinations, retention of 40% spawning biomass seems to be a safe option for sustaining M. monoceros production from Indian waters. Based on this, the study recommends reduction of fishing pressure along north-west, south-west and northeast coast by 70, 60 and 70% respectively from the base level of effort in 2017. The study illustrates that the spatial data from fishing ground, can serve as an additional tool to derive management options. The study also emphasises the need for further investigations on the possibilities of metapopulations of M. monoceros which is widely distributed in all agro-climatic zones along the Indian coast. Keywords: Indian coast, Metapopulation, M. monoceros, Spatial study, Stock assessment","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42641691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.110836-13
C. G. Joshy, A. Suresh, S. K. Panda, C. N. Ravishankar
The live fish import trade in India under the harmonised system (HS) code 0301 (HS-0301) increased exponentially in terms of import quantity and value during the period 2000-2019. India imported 1.32 t of live fish worth US $ 0.017 million in 2000, which increased to 653.27 t worth US $ 3.21 million in 2019. The import of both marine as well as freshwater ornamental fish was found to increase during the period 2013-2019. The major countries exporting marine and freshwater ornamental fish to India were Thailand, Indonesia, Malaysia, Singapore and Sri Lanka. The import of live trout and carp to India was found to be very less during the period 2000-2019. The majority of live fish import to India accounted in the subclass HS030199 since 2017, with 81.55, 91.86 and 74.03% of total live fish imported to India in 2017, 2018 and 2019, respectively. Bangladesh accounted 81.02, 87.84 and 83.11% of total import quantity and 0.74, 82.42 and 49.51% of total import value under the sub-head HS-030199 during 2017, 2018 and 2019, respectively. While import of live fish offers economic opportunities, it has the potential to bring biosecurity threats including fish pathogens to Indian waters. The economic trade-off is to be evaluated on a case to case basis supported with legal and institutional back-up. Enacting a comprehensive legal framework and creating quarantine facilities are critical in this direction. Keywords: Compositional analysis, HS-0301, Import, Ornamental fish, , Trade balance
{"title":"Compositional analysis of live fish import trade in India","authors":"C. G. Joshy, A. Suresh, S. K. Panda, C. N. Ravishankar","doi":"10.21077/ijf.2022.69.4.110836-13","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.110836-13","url":null,"abstract":"The live fish import trade in India under the harmonised system (HS) code 0301 (HS-0301) increased exponentially in terms of import quantity and value during the period 2000-2019. India imported 1.32 t of live fish worth US $ 0.017 million in 2000, which increased to 653.27 t worth US $ 3.21 million in 2019. The import of both marine as well as freshwater ornamental fish was found to increase during the period 2013-2019. The major countries exporting marine and freshwater ornamental fish to India were Thailand, Indonesia, Malaysia, Singapore and Sri Lanka. The import of live trout and carp to India was found to be very less during the period 2000-2019. The majority of live fish import to India accounted in the subclass HS030199 since 2017, with 81.55, 91.86 and 74.03% of total live fish imported to India in 2017, 2018 and 2019, respectively. Bangladesh accounted 81.02, 87.84 and 83.11% of total import quantity and 0.74, 82.42 and 49.51% of total import value under the sub-head HS-030199 during 2017, 2018 and 2019, respectively. While import of live fish offers economic opportunities, it has the potential to bring biosecurity threats including fish pathogens to Indian waters. The economic trade-off is to be evaluated on a case to case basis supported with legal and institutional back-up. Enacting a comprehensive legal framework and creating quarantine facilities are critical in this direction. Keywords: Compositional analysis, HS-0301, Import, Ornamental fish, , Trade balance","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43272499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.123322-02
Kanchi Bhargavi, P. Krishnan, A. Anand, G. Kantharajan, A. Landge, B. Nayak
Reservoirs have tremendous fisheries potential amongst the inland water resources and aptly referred as ‘sleeping giants’, as the fish yield potential of these resources are yet to be tapped. Existing gaps in the availability of absolute information and data on the inland water resources hinder the applicability and implementation of various fisheries development programmes, which in turn impact inland fisheries production. The present study was carried out in the reservoirs viz., Sri Ram Sagar, Kaddam and Swarna from the Godavari Basin, covering the period 2016-2021, as a case study to demonstrate the use of remote sensed data in fisheries stock enhancement planning. The perennial and seasonal water spread area of the reservoirs under study, estimated through composite water maps prepared using Sentinel 2A data ranged between 8 to 19 and 4 to 29%, respectively. Further, the potential area for enclosure fish culture (both cage and pen culture) in these reservoirs were found to range between 14.89% (Sir Ram Sagar) to 48.54% (Kaddam). The field validated results revealed less than 0.1% of the perennial water spread area mapped in these reservoirs is under use for cage culture. This highlights under-utilisation of these reservoirs and demonstrates scope for developing enclosure fish culture or other culture-based fisheries for enhancing the fish production. The study also demonstrates the use of geospatial tools in development planning for expanding enclosure fish culture in the reservoirs and in turn enhancing fisheries production from the reservoirs in India. Keywords: Composite water maps, Enclosure fish culture, Geospatial tools, Godavari River, NDWI, Reservoir, Sentinel 2A data, Water spread area
{"title":"A remote sensing approach to explore the available water spread for fisheries development in the reservoirs of Godavari River Basin, Telangana, India","authors":"Kanchi Bhargavi, P. Krishnan, A. Anand, G. Kantharajan, A. Landge, B. Nayak","doi":"10.21077/ijf.2022.69.4.123322-02","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.123322-02","url":null,"abstract":"Reservoirs have tremendous fisheries potential amongst the inland water resources and aptly referred as ‘sleeping giants’, as the fish yield potential of these resources are yet to be tapped. Existing gaps in the availability of absolute information and data on the inland water resources hinder the applicability and implementation of various fisheries development programmes, which in turn impact inland fisheries production. The present study was carried out in the reservoirs viz., Sri Ram Sagar, Kaddam and Swarna from the Godavari Basin, covering the period 2016-2021, as a case study to demonstrate the use of remote sensed data in fisheries stock enhancement planning. The perennial and seasonal water spread area of the reservoirs under study, estimated through composite water maps prepared using Sentinel 2A data ranged between 8 to 19 and 4 to 29%, respectively. Further, the potential area for enclosure fish culture (both cage and pen culture) in these reservoirs were found to range between 14.89% (Sir Ram Sagar) to 48.54% (Kaddam). The field validated results revealed less than 0.1% of the perennial water spread area mapped in these reservoirs is under use for cage culture. This highlights under-utilisation of these reservoirs and demonstrates scope for developing enclosure fish culture or other culture-based fisheries for enhancing the fish production. The study also demonstrates the use of geospatial tools in development planning for expanding enclosure fish culture in the reservoirs and in turn enhancing fisheries production from the reservoirs in India.\u0000Keywords: Composite water maps, Enclosure fish culture, Geospatial tools, Godavari River, NDWI, Reservoir, Sentinel 2A data, Water spread area","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45426853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.122310-17
Sambhu Chithambaran, Mamdouh Al Harbi
Asian Seabass Lates calcarifer is widely used for pond and cage culture practice in the Kingdom of Saudi Arabia. A studywas carried out to understand the influence of an exogenous androgen, Testosterone propionate (TP) on milt quality ofL. calcarifer. Intramuscular injection of TP at dose 1.0 ml kg-1 was given to mature male fishes grown in a brood stockpond. A control was also maintained without giving hormone injection. After 36 h of injection, milt was collected and miltquality was assessed for colour, sperm cell concentration, motility and viability of spermatozoa. Short-term preservation ofmilt was carried out in oxygen and marine teleost Ringer’s medium at 4oC for 120 h. No significant change was observedin colour and pH of milt, but nature of milt changed from thick to watery due to hormone injection. Enhanced milt volume(14%) and sperm cell concentration (4%) was noticed in fishes from the treatment group 36 h post-injection, when comparedto control. Sperm motility duration and percentage motility were high in treatment fishes than control. Milt preserved inoxygen medium showed high sperm motility and viability when compared to Ringer’s medium. Intramuscular injection ofTP at 1.0 ml kg-1 improved milt volume and quality and therefore can be used for induced breeding of Asian Seabass. Keywords: Asian Seabass, Hormone, Intramuscular injection, Milt quality, Ringer’s medium, Sperm motility, Testosteronepropionate
在沙特阿拉伯王国，亚洲海鲈被广泛用于池塘和网箱养殖。研究了外源雄激素丙酸睾酮(TP)对棉花品质的影响。calcarifer。采用肌肉注射剂量1.0 ml kg-1的TP，对育成的雄鱼进行肌肉注射。另一个对照组在不注射激素的情况下维持。注射36 h后，收集精液，并对精液的颜色、精子浓度、活力和活力进行评估。在氧气和海洋硬骨鱼林格氏培养基中短期保存120 h，在4℃下，没有观察到milt的颜色和pH值发生明显变化，但由于注射激素，milt的性质从粘稠变为水状。注射后36小时，与对照组相比，治疗组鱼类的精子体积(14%)和精子细胞浓度(4%)均有所增加。处理鱼的精子活力持续时间和活力百分比均高于对照组。与林格培养基相比，在氧气培养基中保存的密尔特精子表现出较高的活力和活力。肌肉注射1.0 ml kg-1的tp可改善鱼体体积和质量，可用于亚洲鲈鱼的诱导养殖。关键词:亚洲鲈鱼，激素，肌内注射，稻米质量，林格培养基，精子活力，丙酸睾酮
{"title":"Influence of an exogenous androgen, testosterone propionate on milt quality and short-term preservation of milt of Asian seabass Lates Calcarifer","authors":"Sambhu Chithambaran, Mamdouh Al Harbi","doi":"10.21077/ijf.2022.69.4.122310-17","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.122310-17","url":null,"abstract":" Asian Seabass Lates calcarifer is widely used for pond and cage culture practice in the Kingdom of Saudi Arabia. A studywas carried out to understand the influence of an exogenous androgen, Testosterone propionate (TP) on milt quality ofL. calcarifer. Intramuscular injection of TP at dose 1.0 ml kg-1 was given to mature male fishes grown in a brood stockpond. A control was also maintained without giving hormone injection. After 36 h of injection, milt was collected and miltquality was assessed for colour, sperm cell concentration, motility and viability of spermatozoa. Short-term preservation ofmilt was carried out in oxygen and marine teleost Ringer’s medium at 4oC for 120 h. No significant change was observedin colour and pH of milt, but nature of milt changed from thick to watery due to hormone injection. Enhanced milt volume(14%) and sperm cell concentration (4%) was noticed in fishes from the treatment group 36 h post-injection, when comparedto control. Sperm motility duration and percentage motility were high in treatment fishes than control. Milt preserved inoxygen medium showed high sperm motility and viability when compared to Ringer’s medium. Intramuscular injection ofTP at 1.0 ml kg-1 improved milt volume and quality and therefore can be used for induced breeding of Asian Seabass.\u0000Keywords: Asian Seabass, Hormone, Intramuscular injection, Milt quality, Ringer’s medium, Sperm motility, Testosteronepropionate","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43873930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.124228-08
Jeong-Soo Gim, Sang-Bin Lee, H. Kim, Dong‐Kyun Kim, S. Kwak, G. Joo, Hyunbin Jo
Our study deals with how the short nine-spine stickleback Pungitius kaibarae uses visual cues to select among habitats, thereby reducing predation pressure from the Japanese eel Anguilla japonica. We examined the behaviour of P. kaibaraein selecting four habitats (water weed, sandy, rocky and open water) under the presence/absence of A. japonica. Using video tracking technology, we found that in the presence of A. japonica, sticklebacks preferred specific refuge patches, such as waterweed and rocks, over open water with a sandy bottom. Thus, our investigation demonstrated the importance of habitat structures in evoking escape behaviour. We discuss the importance of this bold behaviour patterns of the prey fish.Keywords: Bold behaviour, Stickleback, Eel, Swimming speed, Video tracking
{"title":"Habitat selection behaviour of Pungitius kaibarae (Gasterosteidae) in the presence of the visual predator Anguilla japonica (Anguillidae)","authors":"Jeong-Soo Gim, Sang-Bin Lee, H. Kim, Dong‐Kyun Kim, S. Kwak, G. Joo, Hyunbin Jo","doi":"10.21077/ijf.2022.69.4.124228-08","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.124228-08","url":null,"abstract":"Our study deals with how the short nine-spine stickleback Pungitius kaibarae uses visual cues to select among habitats, thereby reducing predation pressure from the Japanese eel Anguilla japonica. We examined the behaviour of P. kaibaraein selecting four habitats (water weed, sandy, rocky and open water) under the presence/absence of A. japonica. Using video tracking technology, we found that in the presence of A. japonica, sticklebacks preferred specific refuge patches, such as waterweed and rocks, over open water with a sandy bottom. Thus, our investigation demonstrated the importance of habitat structures in evoking escape behaviour. We discuss the importance of this bold behaviour patterns of the prey fish.Keywords: Bold behaviour, Stickleback, Eel, Swimming speed, Video tracking","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48338717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.124310-15
L. Sahoo, P. Swain, Ajmal Hussan, A. Mohapatra, J. Sundaray
Invasive suckermouth armoured sailfin catfishes of Pterygoplichthys genus is a threat to natural fish biodiversity. Weattempted to identify suckermouth armoured sailfin catfishes, Pterygoplichthys spp. which have successfully invadedand established in the East Kolkata Wetland, using morphological and molecular techniques. Based on the colourationpattern/spot on the belly region they were categorised into three groups viz., Pterygoplichthys pardalis, Pterygoplichthysdisjunctivus and an intermediate group. In total, fin clips from 32 individuals were collected from the above three groupsand a portion of mitochondrial cytochrome oxidase subunit-I (COI) gene was sequenced using Sanger’s method. Out of the32 individuals, good quality sequences were obtained for 30 individuals. Surprisingly, mtDNA COI gene sequence analysisrevealed that a sequence length of 581 bp was identical among all individuals. Species level barcode records from BOLDdatabase revealed the identity of specimens in all categories as P. pardalis. Results of the study suggest that Pterygoplichthysestablished in East Kolkata Wetland might have originated from a single reproducing entity. Keywords: Cytochrome oxidase subunit1, East Kolkata Wetland, Mitochondrial DNA, Pterygoplichthys, Suckermouthsailfin catfish
{"title":"DNA barcoding delineates the identity of invasive South American sucker mouth armoured catfishes of genus Pterygoplichthys of East Kolkata Wetland, West Bengal, India as single species","authors":"L. Sahoo, P. Swain, Ajmal Hussan, A. Mohapatra, J. Sundaray","doi":"10.21077/ijf.2022.69.4.124310-15","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.124310-15","url":null,"abstract":"Invasive suckermouth armoured sailfin catfishes of Pterygoplichthys genus is a threat to natural fish biodiversity. Weattempted to identify suckermouth armoured sailfin catfishes, Pterygoplichthys spp. which have successfully invadedand established in the East Kolkata Wetland, using morphological and molecular techniques. Based on the colourationpattern/spot on the belly region they were categorised into three groups viz., Pterygoplichthys pardalis, Pterygoplichthysdisjunctivus and an intermediate group. In total, fin clips from 32 individuals were collected from the above three groupsand a portion of mitochondrial cytochrome oxidase subunit-I (COI) gene was sequenced using Sanger’s method. Out of the32 individuals, good quality sequences were obtained for 30 individuals. Surprisingly, mtDNA COI gene sequence analysisrevealed that a sequence length of 581 bp was identical among all individuals. Species level barcode records from BOLDdatabase revealed the identity of specimens in all categories as P. pardalis. Results of the study suggest that Pterygoplichthysestablished in East Kolkata Wetland might have originated from a single reproducing entity.\u0000Keywords: Cytochrome oxidase subunit1, East Kolkata Wetland, Mitochondrial DNA, Pterygoplichthys, Suckermouthsailfin catfish","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49667372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.21077/ijf.2022.69.4.122014-06
S. K. Ahirwal, Jaspreet Singh, Tarkeshwar Kumar, V. Bharti, K. Sarma, D. Narayan
The Gangetic pool barb Puntius sophore (Hamilton, 1822) is widely distributed in the freshwater ecosystems of the Indian subcontinent and it is reasonably well-priced due to its nutritional value. A study was conducted to assess the morphometry, length-frequency distribution (LFD), length-weight relationship (LWR), condition factor (CF) and sex ratio of P. sophore collected from the Digha GhatPatipul in Patna, between March 2019 and February 2020. Fifteen morphometric characters and nine meristic counts of 137 specimens were examined for biometric evaluation and 982 samples (1.56-22.09 g TW, 51.06-115.11 mm TL) were analysed for LFD, LWR and CF, respectively. LFD revealed that 28.49% of the males sampled were in the 75-80 mm length class, while 15.94% of the total females sampled were in the 70-75 mm length class. In morphometric analysis, significant correlations were found across the variables and the highest correlation was observed between total length and standard length (r>0.981). LWR exponent value showed positive allometric growth patterns for male, female, and combined sexes, respectively. Condition factor showed no significant variation between the sexes and the observed average values were 1.06 and 1.24 for males and females, respectively (p<0.05). Analysis of the sex ratio showed that females outnumbered males from the 85-90 mm length group onwards and no male specimens were found beyond the 105-110 mm length group.Keywords: Condition factor, Length-weight relationship, Morphometry, P. sophore, Sex ratio
{"title":"Biometric evaluation of Gangetic pool barb Puntius sophore (Hamilton, 1822) from the River Ganga, Bihar, India","authors":"S. K. Ahirwal, Jaspreet Singh, Tarkeshwar Kumar, V. Bharti, K. Sarma, D. Narayan","doi":"10.21077/ijf.2022.69.4.122014-06","DOIUrl":"https://doi.org/10.21077/ijf.2022.69.4.122014-06","url":null,"abstract":"The Gangetic pool barb Puntius sophore (Hamilton, 1822) is widely distributed in the freshwater ecosystems of the Indian subcontinent and it is reasonably well-priced due to its nutritional value. A study was conducted to assess the morphometry, length-frequency distribution (LFD), length-weight relationship (LWR), condition factor (CF) and sex ratio of P. sophore collected from the Digha GhatPatipul in Patna, between March 2019 and February 2020. Fifteen morphometric characters and nine meristic counts of 137 specimens were examined for biometric evaluation and 982 samples (1.56-22.09 g TW, 51.06-115.11 mm TL) were analysed for LFD, LWR and CF, respectively. LFD revealed that 28.49% of the males sampled were in the 75-80 mm length class, while 15.94% of the total females sampled were in the 70-75 mm length class. In morphometric analysis, significant correlations were found across the variables and the highest correlation was observed between total length and standard length (r>0.981). LWR exponent value showed positive allometric growth patterns for male, female, and combined sexes, respectively. Condition factor showed no significant variation between the sexes and the observed average values were 1.06 and 1.24 for males and females, respectively (p<0.05). Analysis of the sex ratio showed that females outnumbered males from the 85-90 mm length group onwards and no male specimens were found beyond the 105-110 mm length group.Keywords: Condition factor, Length-weight relationship, Morphometry, P. sophore, Sex ratio","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42265441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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