Pub Date : 2016-11-14DOI: 10.4172/2150-3508.1000183
V. Oké, Y. Abou, A. Adite, J. Kabre
A 90-days experiment was conducted to study the effect of replacement of fishmeal (FM) with marine fish viscera (MFV) meal on growth performance, body composition and production of Clarias gariepinus fingerlings (mean weight 11.3 ± 0.1 g). Diets were three isonitrogenous (43% crude protein) and isoenergetic (20 KJ/g) diets containing 0% (D0), 30% (D30) and 50% (D50) of MFV, as FM substitute. Diet D0, without MFV, acted as a control. All these diets were compared to the commercial diet coppens developed for C. gariepinus. No significantly differences were found in final weight (range: 220.94-234.1 g), weight gain (range: 1937.2-1971.7%), specific growth rate (range: 3.30-3.37%/day), protein efficiency ratio (range: 1.93-2.09) and annual production (range: 378.3-415.0 kg/are/year) of fish fed coppens diet, D0 and D30 (p>0.05). Fish fed D50 showed significantly lower growth and feed utilization performances (p˂0.05). Moisture and crude protein were similar among dietary treatments (p>0.05). Lipid deposition in fish significantly increased with MFV level in diets, whereas ash content decreased (p˂0.05). The study indicates that MFV meal can be used up to 30% in formulation fish feed for promotion of Clarias gariepinus rearing in rural areas.
{"title":"Growth Performance, Feed Utilization and Body Composition of Clarias gariepinus (Burchell 1822) Fed Marine Fish Viscera-based-diet in Earthen Ponds","authors":"V. Oké, Y. Abou, A. Adite, J. Kabre","doi":"10.4172/2150-3508.1000183","DOIUrl":"https://doi.org/10.4172/2150-3508.1000183","url":null,"abstract":"A 90-days experiment was conducted to study the effect of replacement of fishmeal (FM) with marine fish viscera \u0000 (MFV) meal on growth performance, body composition and production of Clarias gariepinus fingerlings (mean weight \u0000 11.3 ± 0.1 g). Diets were three isonitrogenous (43% crude protein) and isoenergetic (20 KJ/g) diets containing 0% \u0000 (D0), 30% (D30) and 50% (D50) of MFV, as FM substitute. Diet D0, without MFV, acted as a control. All these diets \u0000 were compared to the commercial diet coppens developed for C. gariepinus. No significantly differences were found \u0000 in final weight (range: 220.94-234.1 g), weight gain (range: 1937.2-1971.7%), specific growth rate (range: \u0000 3.30-3.37%/day), protein efficiency ratio (range: 1.93-2.09) and annual production (range: 378.3-415.0 kg/are/year) \u0000 of fish fed coppens diet, D0 and D30 (p>0.05). Fish fed D50 showed significantly lower growth and feed utilization \u0000 performances (p˂0.05). Moisture and crude protein were similar among dietary treatments (p>0.05). Lipid deposition \u0000 in fish significantly increased with MFV level in diets, whereas ash content decreased (p˂0.05). \u0000 The study indicates that MFV meal can be used up to 30% in formulation fish feed for promotion of Clarias \u0000 gariepinus rearing in rural areas.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124894255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-25DOI: 10.4172/2150-3508.1000182
Erkie Asmare, S. Demissie, Dereje Tewabe
Fishing plays a critical role as a ‘bank in the water’ for local populations that largely rely on this activity to access cash quickly. This study aimed: (1) to assess the importance of fisheries in improving farmer’s livelihood in the study area. (2) to assess households and individual's involvement in inland fisheries in terms of utilization and management, and (3) to recommend means of interventions for sustainable use of the resource and enhance benefits from the river fishery. This activity was conducted by using a combination of monitoring of fish catch, focus group discussions, and key informant interviews. Fishing is seasonal and intensively carried out during the dry seasons starting from February up to April. The most popular fishing gears used for fishing are the seed of Millettia ferruginea (in Amharic called Birbira) and barks of Balanites aegyptiaca (locally called Bedeno). In the area the main fish type consumed by the community are Clarias gariepinus [catfish] and Labeobarbus intermedius [Barbus] fish species in fresh and sun dried forms but Oreochromis niloticus is not known as it is edible. The farmers have a good fish consumption habit which is by far greater than the town’s inhabitants. Hence, Farming and fishing are overwhelmingly the most important activities for household food supply and means of income generation. Fish catches from the rivers have declined significantly because of the destructive way of fishing, water pollution, and resource encroachment, thereby threatening the sustainability of Jemma and Wonchit river fisheries as well as the river’s ecosystem.
{"title":"Fisheries of Jemma and Wonchit Rivers: As a Means of Livelihood Diversification and its Challenges in North Shewa Zone, Ethiopia","authors":"Erkie Asmare, S. Demissie, Dereje Tewabe","doi":"10.4172/2150-3508.1000182","DOIUrl":"https://doi.org/10.4172/2150-3508.1000182","url":null,"abstract":"Fishing plays a critical role as a ‘bank in the water’ for local populations that largely rely on this activity to access \u0000 cash quickly. This study aimed: (1) to assess the importance of fisheries in improving farmer’s livelihood in the study \u0000 area. (2) to assess households and individual's involvement in inland fisheries in terms of utilization and \u0000 management, and (3) to recommend means of interventions for sustainable use of the resource and enhance \u0000 benefits from the river fishery. This activity was conducted by using a combination of monitoring of fish catch, focus \u0000 group discussions, and key informant interviews. Fishing is seasonal and intensively carried out during the dry \u0000 seasons starting from February up to April. The most popular fishing gears used for fishing are the seed of Millettia \u0000 ferruginea (in Amharic called Birbira) and barks of Balanites aegyptiaca (locally called Bedeno). In the area the main \u0000 fish type consumed by the community are Clarias gariepinus [catfish] and Labeobarbus intermedius [Barbus] fish \u0000 species in fresh and sun dried forms but Oreochromis niloticus is not known as it is edible. The farmers have a good \u0000 fish consumption habit which is by far greater than the town’s inhabitants. Hence, Farming and fishing are \u0000 overwhelmingly the most important activities for household food supply and means of income generation. Fish \u0000 catches from the rivers have declined significantly because of the destructive way of fishing, water pollution, and \u0000 resource encroachment, thereby threatening the sustainability of Jemma and Wonchit river fisheries as well as the \u0000 river’s ecosystem.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130330647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-18DOI: 10.4172/2150-3508.1000180
E. Espino-Barr, M. Gallardo-Cabello, M. Puente-Gómez, A. Garcia-Boa
Reproduction of Mugil cephalus of the Pacific coast of Mexico was studied. Fish were captured with gill nets and cast nets; they are a common low priced product for local consumption. The study of the reproduction period and ages of first maturity helps manage the fishery. Fish were obtained from local commercial fishery from August to December 2007, January to March 2008 and November 2012 to October 2013. Size and weight, sex and gonad maturity were registered. The male:female ratio was 0.88:1. Mature organisms occurred all year round. Sexual maturation (L50) of males and females was observed at a mean size of 34.0 cm in males (4.64 years of age) and 35.0 cm in females (4.98 years of age). First maturity length (L25) was both 30.0 cm in males and females corresponding to 3.4 years of age in both cases. The allometric relationship with the hepatosomatic index was LW=4.00·10−3 · TL2.771 (r2=0.849). Condition factor indexes of Clark and Safran EW showed a maximum increment during June, August and December; Fulton and Safran TW in July and September to November. The gonadosomatic index showed its highest values from November to January. The hepatosomatic index reached its maximum values in June, July and August. The gastric repletion index reached its highest values in June, February and October. The mean oocytes diameter was 0.38 mm (range 0.22 to 0.52 mm, standard deviation=0.13). Fecundity ranged from 1’422,076 to 1’747,736 oocytes in females between ages 3 and 12 years old, and mean relative fecundity was 2,830 oocytes·g-1 (1,500 to 2,900 oocytes·g-1). This study is the base line for the fishery management of M. cephalus in Central Mexican Pacific, where the main regulations need information on the first maturity size and reproductive season.
{"title":"Reproduction of Mugil cephalus (Percoidei: Mugilidae) off the Central Mexican Pacific Coast","authors":"E. Espino-Barr, M. Gallardo-Cabello, M. Puente-Gómez, A. Garcia-Boa","doi":"10.4172/2150-3508.1000180","DOIUrl":"https://doi.org/10.4172/2150-3508.1000180","url":null,"abstract":"Reproduction of Mugil cephalus of the Pacific coast of Mexico was studied. Fish were captured with gill nets and cast nets; they are a common low priced product for local consumption. The study of the reproduction period and ages of first maturity helps manage the fishery. Fish were obtained from local commercial fishery from August to December 2007, January to March 2008 and November 2012 to October 2013. Size and weight, sex and gonad maturity were registered. The male:female ratio was 0.88:1. Mature organisms occurred all year round. Sexual maturation (L50) of males and females was observed at a mean size of 34.0 cm in males (4.64 years of age) and 35.0 cm in females (4.98 years of age). First maturity length (L25) was both 30.0 cm in males and females corresponding to 3.4 years of age in both cases. The allometric relationship with the hepatosomatic index was LW=4.00·10−3 · TL2.771 (r2=0.849). Condition factor indexes of Clark and Safran EW showed a maximum increment during June, August and December; Fulton and Safran TW in July and September to November. The gonadosomatic index showed its highest values from November to January. The hepatosomatic index reached its maximum values in June, July and August. The gastric repletion index reached its highest values in June, February and October. The mean oocytes diameter was 0.38 mm (range 0.22 to 0.52 mm, standard deviation=0.13). Fecundity ranged from 1’422,076 to 1’747,736 oocytes in females between ages 3 and 12 years old, and mean relative fecundity was 2,830 oocytes·g-1 (1,500 to 2,900 oocytes·g-1). This study is the base line for the fishery management of M. cephalus in Central Mexican Pacific, where the main regulations need information on the first maturity size and reproductive season.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124935458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-10DOI: 10.4172/2150-3508.1000184
B. Kebede, T. Habtamu
A study was carried out from October, 2009 to April, 2010 with the objective of isolating Edwardsiella tarda an important fish pathogen from fish harvested for human consumption from Lake Zeway and Langanoo. A total of 372 tissue samples (three from each fish) comprising liver, intestine and kidney were collected from 124 fish (Clarias gariepinus and Oreochromis niloticus originated from Lake Langanoo and Zeway. Distribution of E. tarda infection among the three organs examined indicated that E. tarda was isolated most frequently from liver (6.5%) followed by intestine (2.4%) and kidney (0.8%) with significant difference among organs. Statistical significant differences (P 005) indicating that both sexes are equally susceptible. The isolation of Edwarsiella from wild fish population of Lakes Zeway and Langano destined for human consumption in the current study is indicates that E. tarda is a potential threat of both the fishery sector/aquaculture and public health. Finally, as is the case for any infectious fish pathogen, there is limited information on E. tarda of fish in Ethiopia and hence further study to have comprehensive information on the agent is forwarded.
{"title":"Isolation and Identification of Edwardsiella tarda from Lake Zeway and Langano, Southern Oromia, Ethiopia","authors":"B. Kebede, T. Habtamu","doi":"10.4172/2150-3508.1000184","DOIUrl":"https://doi.org/10.4172/2150-3508.1000184","url":null,"abstract":"A study was carried out from October, 2009 to April, 2010 with the objective of isolating Edwardsiella tarda an important fish pathogen from fish harvested for human consumption from Lake Zeway and Langanoo. A total of 372 tissue samples (three from each fish) comprising liver, intestine and kidney were collected from 124 fish (Clarias gariepinus and Oreochromis niloticus originated from Lake Langanoo and Zeway. Distribution of E. tarda infection among the three organs examined indicated that E. tarda was isolated most frequently from liver (6.5%) followed by intestine (2.4%) and kidney (0.8%) with significant difference among organs. Statistical significant differences (P 005) indicating that both sexes are equally susceptible. The isolation of Edwarsiella from wild fish population of Lakes Zeway and Langano destined for human consumption in the current study is indicates that E. tarda is a potential threat of both the fishery sector/aquaculture and public health. Finally, as is the case for any infectious fish pathogen, there is limited information on E. tarda of fish in Ethiopia and hence further study to have comprehensive information on the agent is forwarded.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"464 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123448833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-10-03DOI: 10.4172/2150-3508.1000181
N. Z. Mamat, Mohd Idrus Shaari, N. A. Wahab
Aquaponic is a system that mutually integrates aquaculture and plant cultivation (by means of hydroponic). Both crops are combined in a recirculating system that utilizes less water than the traditional farming. Nutrients contained in fish tanks are recycled into plant biomass with the presence of nitrifying bacteria that convert the excreted ammonia to nitrite and then to nitrate. In this study, fifteen sets of aquaponic system were developed to study the growth of African catfish (Clarias gariepinus) and three types of plants; the red and green-red amaranth (Amaranthus spp.) and water spinach (Ipomoea aquatica). The combination of aquaculture and hydroponic gives a new insight into increasing the efficiency of food production which respects principles of sustainable agriculture.
{"title":"The Production of Catfish and Vegetables in an Aquaponic System","authors":"N. Z. Mamat, Mohd Idrus Shaari, N. A. Wahab","doi":"10.4172/2150-3508.1000181","DOIUrl":"https://doi.org/10.4172/2150-3508.1000181","url":null,"abstract":"Aquaponic is a system that mutually integrates aquaculture and plant cultivation (by means of hydroponic). Both \u0000 crops are combined in a recirculating system that utilizes less water than the traditional farming. Nutrients contained \u0000 in fish tanks are recycled into plant biomass with the presence of nitrifying bacteria that convert the excreted \u0000 ammonia to nitrite and then to nitrate. In this study, fifteen sets of aquaponic system were developed to study the \u0000 growth of African catfish (Clarias gariepinus) and three types of plants; the red and green-red amaranth \u0000 (Amaranthus spp.) and water spinach (Ipomoea aquatica). The combination of aquaculture and hydroponic gives a \u0000 new insight into increasing the efficiency of food production which respects principles of sustainable agriculture.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130625301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-08-10DOI: 10.4172/2150-3508.1000177
P. Samanta, I. Pal, A. K. Mukherjee, Debraj Kole, A. Ghosh
The aim of the present study was to investigate the histopathological alterations in the stomach and intestine of Indian freshwater teleost, Anabas testudineus (Bloch, 1792) after Almix® exposure both under laboratory and field conditions. The field (dose 8 g/acre) and laboratory (dose 66.67 mg/l) experiments was carried out for 30 days. Special type of cage was prepared and installed in the pond for the field experiment. Pathological alterations in the concerned fish organs namely stomach and intestine were assessed through light microscopy, scanning and transmission electron microscopy. Lesions observed under light microscopy also endorsed the findings of ultrastructural observations both under laboratory and field conditions. Cytopathological alterations observed under light and electron microscopy revealed that the degree of responses were different in different fish tissues as well as under conditions, here in particular effects in stomach were more prominent in laboratory condition. The overall responses registered in the fish tissues under laboratory condition were more pronounced than field condition. Therefore, these symptoms and/or alterations in the present study due to almix intoxication could be considered as biomarkers in toxicity study in aquatic ecosystem.
{"title":"Histopathological Study in Stomach and Intestine of Anabas testudineus (Bloch, 1792) under Almix Exposure","authors":"P. Samanta, I. Pal, A. K. Mukherjee, Debraj Kole, A. Ghosh","doi":"10.4172/2150-3508.1000177","DOIUrl":"https://doi.org/10.4172/2150-3508.1000177","url":null,"abstract":"The aim of the present study was to investigate the histopathological alterations in the stomach and intestine of Indian freshwater teleost, Anabas testudineus (Bloch, 1792) after Almix® exposure both under laboratory and field conditions. The field (dose 8 g/acre) and laboratory (dose 66.67 mg/l) experiments was carried out for 30 days. Special type of cage was prepared and installed in the pond for the field experiment. Pathological alterations in the concerned fish organs namely stomach and intestine were assessed through light microscopy, scanning and transmission electron microscopy. Lesions observed under light microscopy also endorsed the findings of ultrastructural observations both under laboratory and field conditions. Cytopathological alterations observed under light and electron microscopy revealed that the degree of responses were different in different fish tissues as well as under conditions, here in particular effects in stomach were more prominent in laboratory condition. The overall responses registered in the fish tissues under laboratory condition were more pronounced than field condition. Therefore, these symptoms and/or alterations in the present study due to almix intoxication could be considered as biomarkers in toxicity study in aquatic ecosystem.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132006134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-08-02DOI: 10.4172/2150-3508.1000175
Kidanie Misganaw, A. Getu
In this paper the major description, epidemiology, pathogenesis and clinical sign, diagnosis, treatment and control of parasitic crustaceans in fish has been reviewed. The major crustaceans parasites commonly encountered in cultured and wild fish are: copepods (ergasilidea and lernaeidae), branchiura (argulidae) and isopods). Members of the branchiura and isopod are relatively large and both sexes are parasitic, while copepods are the most common crustacean parasites are generally small to microscopic with both free-living and parasitic stages in their life cycle. These parasitic crustaceans are numerous and have worldwide distribution in fresh, brackish and salt water. Most of them can be seen with naked eyes as they attach to the gills, bodies and fins of the host. They are increasingly serious problem in cultured fish and can infect wild population. Usually they cause only minor harm to their hosts when present in small numbers. However, in case of heavy infections severe damage to skin, muscles, and gills tissue accompanied with secondary infections, and resulting in decreased production. Good health management and good environment management are crucial in avoiding occurrence of crustacean parasites.
{"title":"Review on Major Parasitic Crustacean in Fish","authors":"Kidanie Misganaw, A. Getu","doi":"10.4172/2150-3508.1000175","DOIUrl":"https://doi.org/10.4172/2150-3508.1000175","url":null,"abstract":"In this paper the major description, epidemiology, pathogenesis and clinical sign, diagnosis, treatment and control of parasitic crustaceans in fish has been reviewed. The major crustaceans parasites commonly encountered in cultured and wild fish are: copepods (ergasilidea and lernaeidae), branchiura (argulidae) and isopods). Members of the branchiura and isopod are relatively large and both sexes are parasitic, while copepods are the most common crustacean parasites are generally small to microscopic with both free-living and parasitic stages in their life cycle. These parasitic crustaceans are numerous and have worldwide distribution in fresh, brackish and salt water. Most of them can be seen with naked eyes as they attach to the gills, bodies and fins of the host. They are increasingly serious problem in cultured fish and can infect wild population. Usually they cause only minor harm to their hosts when present in small numbers. However, in case of heavy infections severe damage to skin, muscles, and gills tissue accompanied with secondary infections, and resulting in decreased production. Good health management and good environment management are crucial in avoiding occurrence of crustacean parasites.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133395491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-08-02DOI: 10.4172/2150-3508.1000178
Kareem Ok, Olanrewaju An, E. Osho, O. Orisasona, Akintunde Ma
Hepsetus odoe is a commercially valuable fish and is considered as endemic to Nigeria. The growth patterns and condition factor of Hepsetus odoe from Lake Eleyele, Oyo State were investigated as an aspect of its biology essential for bringing it to culture. A Total of 205 specimens (55 and 150, males and females, respectively) were collected between June, 2012 and August, 2012. The morphometric indices such as Total Length (TL), Standard Length (SL), Body Weight (BW) and Stomach Weight (SW) were assessed using standard methods. Also, the length-weight relationship (W=aLb) and Condition factor (100W/L3) were calculated. Sex ratio of 1:3 (Males and Females) was obtained which shows a female dominated population. The Standard length (SL) and body weight (BW) ranged from 16.60-30.50 cm and 51.0-250.0 g respectively. Length-weight relationship equations were calculated as: Log BW=2.051+3.105log SL (r=0.93) This analysis showed significant relationship between the standard length, body weight and stomach weight. The relative condition factor (Kn) calculated ranged from 0.99-2.14 while the mean K value was 1.24. The condition factor fall within the range recommended for freshwater fish species in the tropics. The growth pattern indicates that the fish follows cube law and exhibited positive allometry growth. This information provides important tool in fishery management and guide for future culture trials.
{"title":"Growth Patterns and Condition Factor of Hepsetus odoe (Bloch, 1794) Captured in Eleyele Lake, Southwest Nigeria","authors":"Kareem Ok, Olanrewaju An, E. Osho, O. Orisasona, Akintunde Ma","doi":"10.4172/2150-3508.1000178","DOIUrl":"https://doi.org/10.4172/2150-3508.1000178","url":null,"abstract":"Hepsetus odoe is a commercially valuable fish and is considered as endemic to Nigeria. The growth patterns and condition factor of Hepsetus odoe from Lake Eleyele, Oyo State were investigated as an aspect of its biology essential for bringing it to culture. A Total of 205 specimens (55 and 150, males and females, respectively) were collected between June, 2012 and August, 2012. The morphometric indices such as Total Length (TL), Standard Length (SL), Body Weight (BW) and Stomach Weight (SW) were assessed using standard methods. Also, the length-weight relationship (W=aLb) and Condition factor (100W/L3) were calculated. Sex ratio of 1:3 (Males and Females) was obtained which shows a female dominated population. The Standard length (SL) and body weight (BW) ranged from 16.60-30.50 cm and 51.0-250.0 g respectively. Length-weight relationship equations were calculated as: \u0000Log BW=2.051+3.105log SL (r=0.93) \u0000This analysis showed significant relationship between the standard length, body weight and stomach weight. The relative condition factor (Kn) calculated ranged from 0.99-2.14 while the mean K value was 1.24. The condition factor fall within the range recommended for freshwater fish species in the tropics. The growth pattern indicates that the fish follows cube law and exhibited positive allometry growth. This information provides important tool in fishery management and guide for future culture trials.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125635519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-08-01DOI: 10.4172/2150-3508.1000176
M. SaeedGanjoor
In winter of 2015 we observed gross mortality of fry fish in some tanks of a hatchery in Iran. They had dissonant swimming, spiral swimming, skin darkness, abdominal distension, and anorexia. At the beginning, mortality was low but it increased more and more during the several days. The fry were in fiberglass tanks with 1000 litres of water. It was about 20000 fry in each tank at the beginning. Two activities did synchronously while mortality observation. At the first, some fry sampled from each tanks and sent to laboratory for pathogen detection. The next, 9 tanks selected and grouped as 3 treatments (control, treatment-1 and treatment-2). Control treatment was consisting of 3 tanks that they had not mortality. Treatment-1 and Treatment-2 have the highest mortality and each of them was consisting of 3 tanks. Then, 10 ppm chloramin-T as disinfectant compound added to each tanks of treatment-1 during 1 hour in 3 continuous days (3 times). The tanks of treatment-2 added no drug. After 7 days mortality of fry in each tank estimated and compared with each other. Survival in tanks of treatment-1 was about 76% while survival in tanks of treatment-2 was about 27% while survival in control tanks was about 98%. One month later, results of laboratory tests reported. We found that fish of control tanks were safe (without pathogen) while fish of treatment-1 and treatment-2 were infected with IPN-virus and VHS-virus based on RT-PCR test. Totally 36 fry had been examined by RT-PCR. We founded that 10 fry were IPN+ and 2 of them were VHS+. Clearly; results showed that chloramin-T is able to control the viral infection of Oncorhynchus mykiss (p<0.05) in statistical comparison, it confirmed with SPSS software by using Anova-test. Chloramine-T increased surveillance from 27% to 76% while viral contamination had been confirmed.
{"title":"To Reduce Mortality of Fry Fish ( Oncorhynchus mykiss ) Caused with Viral Infection (IPNV and VHSV) by Water Treatment with Chloramin-T as Disinfectant","authors":"M. SaeedGanjoor","doi":"10.4172/2150-3508.1000176","DOIUrl":"https://doi.org/10.4172/2150-3508.1000176","url":null,"abstract":"In winter of 2015 we observed gross mortality of fry fish in some tanks of a hatchery in Iran. They had dissonant swimming, spiral swimming, skin darkness, abdominal distension, and anorexia. At the beginning, mortality was low but it increased more and more during the several days. The fry were in fiberglass tanks with 1000 litres of water. It was about 20000 fry in each tank at the beginning. Two activities did synchronously while mortality observation. At the first, some fry sampled from each tanks and sent to laboratory for pathogen detection. The next, 9 tanks selected and grouped as 3 treatments (control, treatment-1 and treatment-2). Control treatment was consisting of 3 tanks that they had not mortality. Treatment-1 and Treatment-2 have the highest mortality and each of them was consisting of 3 tanks. Then, 10 ppm chloramin-T as disinfectant compound added to each tanks of treatment-1 during 1 hour in 3 continuous days (3 times). The tanks of treatment-2 added no drug. After 7 days mortality of fry in each tank estimated and compared with each other. Survival in tanks of treatment-1 was about 76% while survival in tanks of treatment-2 was about 27% while survival in control tanks was about 98%. One month later, results of laboratory tests reported. We found that fish of control tanks were safe (without pathogen) while fish of treatment-1 and treatment-2 were infected with IPN-virus and VHS-virus based on RT-PCR test. Totally 36 fry had been examined by RT-PCR. We founded that 10 fry were IPN+ and 2 of them were VHS+. Clearly; results showed that chloramin-T is able to control the viral infection of Oncorhynchus mykiss (p<0.05) in statistical comparison, it confirmed with SPSS software by using Anova-test. Chloramine-T increased surveillance from 27% to 76% while viral contamination had been confirmed.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124231634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2016-07-25DOI: 10.4172/2150-3508.1000174
Kidanie Misganaw, A. Getu
The study area was conducted in the North Western part of Lake Tana which are three commercially fish species are found (Tilapia, Catfish and Barbus species). The study was focused on fish production and marketing system. Three landing sites were selected purposively for the survey based on the experience of fishing practicest. A total of 95 fishers were interviewed: from each landing site (“Delgie 27”, “Goregora 35” and “Infranze 33.”). The data collection was conducted from October 2012-June 2013. This consists of both form primary and secondary source. A simple random sampling technique was employed covering fishers. Descriptive and statistical package for social sciences (SPSS V-17) was used in analyzing. From sample respondents, 100% were reed boat owners. All sampled fishers from the three fish landing sites were used to catch Nile tilapia (Oreochromis niloticus), African catfish (Clarias gariepinus) and large barbs (Labeobarbus spp.). Fishing, crop production, animal husbandry, petty trade and causal laborer contributed 60%, 21%, 12%, 2% and 5% of fishers’ livelihood, respectively. Fisheries development interventions should be aimed at addressing both fish production and marketing problems. The study further suggested that fish quality, fish supply, education and training, licensing of the fishers and improving access to services should receive due attention to improve fish marketing and production system.
{"title":"Marketing and Livelihood Contribution of Fishermen in Lake Tana, North Western Part of Ethiopia","authors":"Kidanie Misganaw, A. Getu","doi":"10.4172/2150-3508.1000174","DOIUrl":"https://doi.org/10.4172/2150-3508.1000174","url":null,"abstract":"The study area was conducted in the North Western part of Lake Tana which are three commercially fish species are found (Tilapia, Catfish and Barbus species). The study was focused on fish production and marketing system. Three landing sites were selected purposively for the survey based on the experience of fishing practicest. A total of 95 fishers were interviewed: from each landing site (“Delgie 27”, “Goregora 35” and “Infranze 33.”). The data collection was conducted from October 2012-June 2013. This consists of both form primary and secondary source. A simple random sampling technique was employed covering fishers. Descriptive and statistical package for social sciences (SPSS V-17) was used in analyzing. From sample respondents, 100% were reed boat owners. All sampled fishers from the three fish landing sites were used to catch Nile tilapia (Oreochromis niloticus), African catfish (Clarias gariepinus) and large barbs (Labeobarbus spp.). Fishing, crop production, animal husbandry, petty trade and causal laborer contributed 60%, 21%, 12%, 2% and 5% of fishers’ livelihood, respectively. Fisheries development interventions should be aimed at addressing both fish production and marketing problems. The study further suggested that fish quality, fish supply, education and training, licensing of the fishers and improving access to services should receive due attention to improve fish marketing and production system.","PeriodicalId":166175,"journal":{"name":"Fisheries and Aquaculture Journal","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126766650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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