K. Silambarasan, K. Sujatha, A. Sundaramanickam, E. Rajalakshmi
The present study reports the first occurrence of two spot razor fish, Iniistius bimaculatus (Ruppell, 1829) from the Chennai coastal waters, Southeast coast of India. Two specimens measuring 141 mm and 169 mm TL was collected from trawl catches in the Chennai coast during September 2010. A systematic account of this species and a description, colour and notes on its distribution is provided. The controversy of two similar genus Iniistius and Xyrichtys were discussed. Key words: Two spot razor fish, Iniistius bimaculatus, trawl catch, Chennai coast.
{"title":"Preliminary report on two spot razor fish, Iniistius bimaculatus (Ruppell, 1829) found in the Chennai coastal waters, southeast coast of India","authors":"K. Silambarasan, K. Sujatha, A. Sundaramanickam, E. Rajalakshmi","doi":"10.5897/IJFA2016.0569","DOIUrl":"https://doi.org/10.5897/IJFA2016.0569","url":null,"abstract":"The present study reports the first occurrence of two spot razor fish, Iniistius bimaculatus (Ruppell, 1829) from the Chennai coastal waters, Southeast coast of India. Two specimens measuring 141 mm and 169 mm TL was collected from trawl catches in the Chennai coast during September 2010. A systematic account of this species and a description, colour and notes on its distribution is provided. The controversy of two similar genus Iniistius and Xyrichtys were discussed. \u0000 \u0000 Key words: Two spot razor fish, Iniistius bimaculatus, trawl catch, Chennai coast.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115159193","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}
The movement patterns of juvenile and adult Chilean flounder (P. adpersus) were investigated inside Tongoy Bay using ultrasound signal acoustic receivers from June 2012 to March, 2013. Flounder landings in Tongoy Bay and Puerto Aldea from December 2011 to March 2013 were examined. Multiple regression analysis indicated that the Catch per Unit of Effort of Chilean flounder was significantly and negatively related to temperature and depth. Analyses of site- and time-specific length-frequency distributions indicated movement of Chilean flounder on the time scale of weeks, which was likely due to emigration of fish >30 cm in total length. A mark-recapture study was performed. Visible elastomer paint was used to tag 7,510 Chilean flounder. A total of 12 Chilean flounder individuals of different lengths were tagged with an ultrasound transmission device to monitor their movement inside Tongoy Bay. Adults flounder showed increased activity inside Tongoy Bay during the study period, likely due of the differences in length among the released individuals. Although differences were detected in the area occupied by juvenile and adult flounders in Tongoy Bay, it was also noticed that the smaller sized individuals exhibited changes in behavior after implanting the transmitters that resulted in impaired capacity to move freely. Key words: Chilean flounder, acoustic telemetry, movement patters, landing, mark-recapture.
{"title":"Movement patterns of Chilean flounder (Paralichthys adspersus) inside Tongoy Bay (central northern Chile): Observations using passive acoustic telemetry","authors":"P. Rojas","doi":"10.5897/IJFA2016.0546","DOIUrl":"https://doi.org/10.5897/IJFA2016.0546","url":null,"abstract":"The movement patterns of juvenile and adult Chilean flounder (P. adpersus) were investigated inside Tongoy Bay using ultrasound signal acoustic receivers from June 2012 to March, 2013. Flounder landings in Tongoy Bay and Puerto Aldea from December 2011 to March 2013 were examined. Multiple regression analysis indicated that the Catch per Unit of Effort of Chilean flounder was significantly and negatively related to temperature and depth. Analyses of site- and time-specific length-frequency distributions indicated movement of Chilean flounder on the time scale of weeks, which was likely due to emigration of fish >30 cm in total length. A mark-recapture study was performed. Visible elastomer paint was used to tag 7,510 Chilean flounder. A total of 12 Chilean flounder individuals of different lengths were tagged with an ultrasound transmission device to monitor their movement inside Tongoy Bay. Adults flounder showed increased activity inside Tongoy Bay during the study period, likely due of the differences in length among the released individuals. Although differences were detected in the area occupied by juvenile and adult flounders in Tongoy Bay, it was also noticed that the smaller sized individuals exhibited changes in behavior after implanting the transmitters that resulted in impaired capacity to move freely. \u0000 \u0000 Key words: Chilean flounder, acoustic telemetry, movement patters, landing, mark-recapture.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123728158","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}
B. Ian, M. Chanda, Mupenda Nephter, Shula Kefi Alexander
The objective of the current study was to investigate the growth performance and haematological parameters of Oreochromis niloticus fed on four different diets at different Moringa oleifera leaf meal inclusion levels over a period of 33 weeks. The results indicate that Moringa leaf meal causes depressed growth in fish but may increase the immunity of the fish to fight infections and diseases. The four inclusion levels used were: 0% (No Moringa - control), 5, 10 and 15%. There was a significant (p 0.05) difference among the fish fed with the four diets. However, the SGR and MWG were highest in the control fish followed by 15% then 10% and lastly 5%. The Gonadal Somatic Index, Hepatosomatic Index and Cardiosomatic Index were not significantly (p>0.05) different among the four treatments. The mean values of haematological parameters showed no significant (p>0.05) difference among the fish fed on the four diets. However, the Mean Cell Haemoglobin in 15% Moringa diet was significantly different from the control diet. White Blood Cells were not significantly different among the treatments (p>0.05) though high values were observed in treatments with Moringa inclusion. The study has shown that inclusion of Moringa to the fish diet results in depressed growth but it improves the immunity of the fish because of an increase in White Blood cells. Further studies to explore the use of Moringa in fish diets at rates which do not cause depressed growth but improve immunity are recommended. Key words: Growth performance, haematological parameters, Moringa oleifera, Oreochromis niloticus, protein source.
{"title":"Analysis of growth performance and haematological parameters of Oreochromis niloticus fed on a varying diet of Moringa oleifera Lam. leaf meal as an additive protein source","authors":"B. Ian, M. Chanda, Mupenda Nephter, Shula Kefi Alexander","doi":"10.5897/IJFA2016.0570","DOIUrl":"https://doi.org/10.5897/IJFA2016.0570","url":null,"abstract":"The objective of the current study was to investigate the growth performance and haematological parameters of Oreochromis niloticus fed on four different diets at different Moringa oleifera leaf meal inclusion levels over a period of 33 weeks. The results indicate that Moringa leaf meal causes depressed growth in fish but may increase the immunity of the fish to fight infections and diseases. The four inclusion levels used were: 0% (No Moringa - control), 5, 10 and 15%. There was a significant (p 0.05) difference among the fish fed with the four diets. However, the SGR and MWG were highest in the control fish followed by 15% then 10% and lastly 5%. The Gonadal Somatic Index, Hepatosomatic Index and Cardiosomatic Index were not significantly (p>0.05) different among the four treatments. The mean values of haematological parameters showed no significant (p>0.05) difference among the fish fed on the four diets. However, the Mean Cell Haemoglobin in 15% Moringa diet was significantly different from the control diet. White Blood Cells were not significantly different among the treatments (p>0.05) though high values were observed in treatments with Moringa inclusion. The study has shown that inclusion of Moringa to the fish diet results in depressed growth but it improves the immunity of the fish because of an increase in White Blood cells. Further studies to explore the use of Moringa in fish diets at rates which do not cause depressed growth but improve immunity are recommended. \u0000 \u0000 Key words: Growth performance, haematological parameters, Moringa oleifera, Oreochromis niloticus, protein source.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127728831","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}
A. U. I. Meko, S. Berhimpon, I. K. Suwetja, F. Ijong
One of the meat products in East Nusa Tenggara is called “se’i”, commonly made from beef, pork, deer meat, and recently have been developed using fish meat. Moisture Sorption Isotherm (MSI) is an important characteristic of food which is almost affected to aspect of the dehydration process and storage stability of the dried product. The aims of this study are to produce tuna se’i using liquid smoke with different concentrations, and to determine the MSIs using a constant relative humidity camber. In this method, water content of samples are allowed to equilibrate in a closed chamber with a salt solution which produces a desired relative humidity. Tuna se’i were made from two part of the tuna meat, that is, dorsal and belly. Five liquid smoke concentrations were used to dip the meats, that is, 1.0, 1.2, 1.4, 1.6 and 1.8%. The results show higher water conten in se’i from dorsal and the lower in se’i made from belly. The equilibrium moisture conents for samples in lower RHs ( 54%) ranged between 11.12 and 75.65% (db). Using five models equations, Oswin models shown best fit values of regression coefficients, with ranges value of relatife determination, 4.81 to 9.89, and MSI curves were sigmoid. From the MSI curves, can be conclude that tuna se’i need a packaging for storage in ambient temperature specially RHs above 50%. Key words: Liquid smoke, se’i, moisture sorption isotherm (MSI), equilibrium moisture content.
{"title":"Moisture sorption isotherm of Tuna Sei, smoked with liquid smoke","authors":"A. U. I. Meko, S. Berhimpon, I. K. Suwetja, F. Ijong","doi":"10.5897/IJFA2016.0573","DOIUrl":"https://doi.org/10.5897/IJFA2016.0573","url":null,"abstract":"One of the meat products in East Nusa Tenggara is called “se’i”, commonly made from beef, pork, deer meat, and recently have been developed using fish meat. Moisture Sorption Isotherm (MSI) is an important characteristic of food which is almost affected to aspect of the dehydration process and storage stability of the dried product. The aims of this study are to produce tuna se’i using liquid smoke with different concentrations, and to determine the MSIs using a constant relative humidity camber. In this method, water content of samples are allowed to equilibrate in a closed chamber with a salt solution which produces a desired relative humidity. Tuna se’i were made from two part of the tuna meat, that is, dorsal and belly. Five liquid smoke concentrations were used to dip the meats, that is, 1.0, 1.2, 1.4, 1.6 and 1.8%. The results show higher water conten in se’i from dorsal and the lower in se’i made from belly. The equilibrium moisture conents for samples in lower RHs ( 54%) ranged between 11.12 and 75.65% (db). Using five models equations, Oswin models shown best fit values of regression coefficients, with ranges value of relatife determination, 4.81 to 9.89, and MSI curves were sigmoid. From the MSI curves, can be conclude that tuna se’i need a packaging for storage in ambient temperature specially RHs above 50%. \u0000 \u0000 \u0000 \u0000 Key words: Liquid smoke, se’i, moisture sorption isotherm (MSI), equilibrium moisture content.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125135343","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}
This study discusses the first recorded occurrence of the Red Sea goatfish, Parupeneus forsskali in the Egyptian Mediterranean waters, to the best of the authors’ understanding. On 31 January 2016, a single specimen of this species was captured from Alexandria coastal waters (31°16'N; 30°10'E), Mediterranean Sea, Egypt. The collected specimen represents the first record of P. forsskali in the Egyptian Mediterranean waters. This specimen has a total length of 26.5 cm, fork length of 23.0 cm and standard length of 21.5 cm and weighed 228.4 g (total weight). The finding of this paper confirms the establishment of this Lessepsian immigrant along the eastern Mediterranean. Key words: Parupeneus forsskali, Lessepsian immigrant, Mediterranean, Egypt.
{"title":"First occurrence of the Red Sea goatfish, Parupeneus forsskali (Fourmanoir Guz, 1976) in the coastal waters of Egyptian Mediterranean Sea","authors":"S. Mehanna, U. Mahmoud, E. Hassanien","doi":"10.5897/IJFA2016.0556","DOIUrl":"https://doi.org/10.5897/IJFA2016.0556","url":null,"abstract":"This study discusses the first recorded occurrence of the Red Sea goatfish, Parupeneus forsskali in the Egyptian Mediterranean waters, to the best of the authors’ understanding. On 31 January 2016, a single specimen of this species was captured from Alexandria coastal waters (31°16'N; 30°10'E), Mediterranean Sea, Egypt. The collected specimen represents the first record of P. forsskali in the Egyptian Mediterranean waters. This specimen has a total length of 26.5 cm, fork length of 23.0 cm and standard length of 21.5 cm and weighed 228.4 g (total weight). The finding of this paper confirms the establishment of this Lessepsian immigrant along the eastern Mediterranean. \u0000 \u0000 \u0000 \u0000 Key words: Parupeneus forsskali, Lessepsian immigrant, Mediterranean, Egypt.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125561715","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}
N. Kasozi, Hellen Opie, Gerald Iwe, Christopher Enima, M. Nkambo, Martin Turyashemererwa, J. Naluwayiro, K. Sadik
Selection and management of sites are among the most significant elements for the success and sustainability of aquaculture operations. Water quality, water depth and water current are three of the major factors that need to be considered before initiating cage culture in a natural water body. This study was conducted to identify suitable sites for cage farming along the Albert Nile of Uganda by assessing the physical, chemical and topographical characteristics over a three month period. Four bays (Odoi, Fundo, Onere and Isirini) were randomly sampled and the results were compared against the acceptable standards. Basing on the physical and chemical criteria, most of the surveyed points were within the acceptable ranges except for the water depths which were lower and total suspended solids which were higher than the recommended ranges. Regarding topographical characteristics, Odoi and Fundo bays were found to be very prone to floating weeds and submergent macrophytes. All the sampled areas within Odoi, Fundo and Onere fishing bays whose depths were found to be more than 2 m can be manipulated to have Low Volume High Density (LVHD) cages while Isirini, Acaar and Ayilebe fishing bays were found not to be suitable for cage culture because they were very shallow. Key words: Albert Nile, cage culture, site selection, Uganda.
{"title":"Site suitability assessment of selected bays along the Albert Nile for Cage Aquaculture in West Nile region of Uganda","authors":"N. Kasozi, Hellen Opie, Gerald Iwe, Christopher Enima, M. Nkambo, Martin Turyashemererwa, J. Naluwayiro, K. Sadik","doi":"10.5897/IJFA2016.0562","DOIUrl":"https://doi.org/10.5897/IJFA2016.0562","url":null,"abstract":"Selection and management of sites are among the most significant elements for the success and sustainability of aquaculture operations. Water quality, water depth and water current are three of the major factors that need to be considered before initiating cage culture in a natural water body. This study was conducted to identify suitable sites for cage farming along the Albert Nile of Uganda by assessing the physical, chemical and topographical characteristics over a three month period. Four bays (Odoi, Fundo, Onere and Isirini) were randomly sampled and the results were compared against the acceptable standards. Basing on the physical and chemical criteria, most of the surveyed points were within the acceptable ranges except for the water depths which were lower and total suspended solids which were higher than the recommended ranges. Regarding topographical characteristics, Odoi and Fundo bays were found to be very prone to floating weeds and submergent macrophytes. All the sampled areas within Odoi, Fundo and Onere fishing bays whose depths were found to be more than 2 m can be manipulated to have Low Volume High Density (LVHD) cages while Isirini, Acaar and Ayilebe fishing bays were found not to be suitable for cage culture because they were very shallow. \u0000 \u0000 \u0000 \u0000 Key words: Albert Nile, cage culture, site selection, Uganda.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133429730","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}
F. Kapute, J. Valeta, J. Likongwe, J. Kang’ombe, J. Nagoli, D. Mbamba
An on-farm study was conducted in Chingale area in Zomba, Southern Malawi to assess the growth of three tilapia fish species in earthen ponds of different sizes and water depths. The experiment was laid out in a factorial design of 200 and 400 m2 pond sizes, 0.8 and 1.2 m pond water depths, and fish species: Oreochromis karongae, Oreochromis shiranus and Tilapia rendalli, replicated thrice among randomly selected farmers. Ponds were fertilized monthly with fresh chicken manure at an application rate of 1 ton/ha and fish were fed on maize bran as a supplement at 5% body weight. Fish were sampled and weighed every four weeks over 6 months. O. karongae attained the highest weight gain (65.75 g) in smaller ponds (200 m2) translating into an overall higher gross yield of 2.91 tons/ha/year (P 0.05). Fish in deeper ponds had a significantly higher overall mean final weight (52.26 g) (P<0.05). T. rendalli exhibited the lowest average daily weight gain (0.27) especially in 200 m2 ponds, but had the highest specific growth rate (1.65%) while overall, O. karongae was the most advanced of the three tilapia species in terms of growth. Findings from this study suggest that for small-commercial fish farmers, smaller but deeper ponds produce better fish production results, hence should be adopted. Key words: Tilapia, pond water depth, pond size, weight gain.
{"title":"Growth performance of three tilapia fish species raised at varied pond sizes and water depths","authors":"F. Kapute, J. Valeta, J. Likongwe, J. Kang’ombe, J. Nagoli, D. Mbamba","doi":"10.5897/IJFA2016.0566","DOIUrl":"https://doi.org/10.5897/IJFA2016.0566","url":null,"abstract":"An on-farm study was conducted in Chingale area in Zomba, Southern Malawi to assess the growth of three tilapia fish species in earthen ponds of different sizes and water depths. The experiment was laid out in a factorial design of 200 and 400 m2 pond sizes, 0.8 and 1.2 m pond water depths, and fish species: Oreochromis karongae, Oreochromis shiranus and Tilapia rendalli, replicated thrice among randomly selected farmers. Ponds were fertilized monthly with fresh chicken manure at an application rate of 1 ton/ha and fish were fed on maize bran as a supplement at 5% body weight. Fish were sampled and weighed every four weeks over 6 months. O. karongae attained the highest weight gain (65.75 g) in smaller ponds (200 m2) translating into an overall higher gross yield of 2.91 tons/ha/year (P 0.05). Fish in deeper ponds had a significantly higher overall mean final weight (52.26 g) (P<0.05). T. rendalli exhibited the lowest average daily weight gain (0.27) especially in 200 m2 ponds, but had the highest specific growth rate (1.65%) while overall, O. karongae was the most advanced of the three tilapia species in terms of growth. Findings from this study suggest that for small-commercial fish farmers, smaller but deeper ponds produce better fish production results, hence should be adopted. \u0000 \u0000 Key words: Tilapia, pond water depth, pond size, weight gain.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131293147","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}
A. Fossati, G. Bergmann, L. A. O. Ribeiro, D. P. S. Júnior, T. M. Schneider, L. Kindlein
The aim of this work was to evaluate the effect of the food additives, sodium chloride, sodium metabisulfite, sodium nitrite and citric acid on the anti-melanotic activity in shrimp (Xyphopenaeus kroyeri) kept under refrigeration for 13 days post-capture. A sensory panel and color measurements (L*: luminosity, a*: red-green axis saturation and b*: yellow-blue axis saturation) was conducted during storage to evaluate the development stages of melanosis. Statistical differences were found in the colorimetric indexes (L*, a* and b*) and melanosis levels in all the treatments. The best results were found in 2.5% sodium metabisulfite. However, 2% sodium chloride had similar results and presented advantages such as low cost, maintaining firmness, general appearance, flavor, microbiological control, besides not causing allergic reactions. The sodium chloride is an excellent alternative to sodium metabisulfite. Key words: sodium chloride, shrimp storage, sodium metabisulfite, shelf-life.
{"title":"Effects of different additives on colorimetry and melanosis prevention of Atlantic seabob shrimp (Xyphopenaeus kroyeri) stored under refrigeration","authors":"A. Fossati, G. Bergmann, L. A. O. Ribeiro, D. P. S. Júnior, T. M. Schneider, L. Kindlein","doi":"10.5897/IJFA2016.0564","DOIUrl":"https://doi.org/10.5897/IJFA2016.0564","url":null,"abstract":"The aim of this work was to evaluate the effect of the food additives, sodium chloride, sodium metabisulfite, sodium nitrite and citric acid on the anti-melanotic activity in shrimp (Xyphopenaeus kroyeri) kept under refrigeration for 13 days post-capture. A sensory panel and color measurements (L*: luminosity, a*: red-green axis saturation and b*: yellow-blue axis saturation) was conducted during storage to evaluate the development stages of melanosis. Statistical differences were found in the colorimetric indexes (L*, a* and b*) and melanosis levels in all the treatments. The best results were found in 2.5% sodium metabisulfite. However, 2% sodium chloride had similar results and presented advantages such as low cost, maintaining firmness, general appearance, flavor, microbiological control, besides not causing allergic reactions. The sodium chloride is an excellent alternative to sodium metabisulfite. \u0000 \u0000 Key words: sodium chloride, shrimp storage, sodium metabisulfite, shelf-life.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125361393","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}
This study examined the potential of catfish pituitary cells to proliferate in culture media and that of hormones produced in their primary culture to induce spawning in African catfish. The trypsinized pituitary cells were cultured in three culture media RPMI 1640, McCoy 5a and M2 media with addition of 10% fetal bovine serum. Female catfish (800±200 g) were induced using the culture medium that gave the shortest population doubling time and highest cell count (RPMI 1640). The eggs were fertilized with sperm cells in vitro. The fertilization and hatchability rates were determined. The blood samples of the induced spawners were collected at O (before injection), 3, 6, 9 and 12 h, respectively after injection. The collected samples of blood plasma were analyzed using enzyme-linked immunosorbent assay for quantitative determinations of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). A significant increase in the cell counts over the initial seeding density of 4.1 × 106/ml after 12 h of culture was established in each of the three culture media used. The induced spawning bio-assay which served as a biochemical marker for gonadotrophin specific function showed that 97.5 g/kg of mature oocytes were spawned from cultured pituitary cells (CPC), 127.5 g/kg from induction with fresh pituitary gland (FPG) and 157 g/Kg from gonadotrophin releasing hormone analogue (Ovaprim) induced catfishes (800±200 g). The fertilization rate of cultured pituitary cells (CPC) differed significantly (P 0.05). The results of the plasma gonadotrophin revealed that the highest levels of plasma LH and FSH were reached between 9 and 12 h of ovulation in all the inducers used. The two pituitary based hormones (FSH and LH) played complementary roles during ovulation and spawning of catfish eggs. This study provides an insight to the possibility of using hormones from the primary culture of pituitary cells to induce spawning in African catfish. Key words: Pituitary cells, primary culture, induced spawning, ovulation.
{"title":"Ovulation induced in African catfish (Clarias gariepinus, Burchell 1822) by hormones produced in the primary culture of pituitary cells","authors":"O. O. Oyeleye, S. I. Ola, O. Omitogun","doi":"10.5897/ijfa2015.0523","DOIUrl":"https://doi.org/10.5897/ijfa2015.0523","url":null,"abstract":"This study examined the potential of catfish pituitary cells to proliferate in culture media and that of hormones produced in their primary culture to induce spawning in African catfish. The trypsinized pituitary cells were cultured in three culture media RPMI 1640, McCoy 5a and M2 media with addition of 10% fetal bovine serum. Female catfish (800±200 g) were induced using the culture medium that gave the shortest population doubling time and highest cell count (RPMI 1640). The eggs were fertilized with sperm cells in vitro. The fertilization and hatchability rates were determined. The blood samples of the induced spawners were collected at O (before injection), 3, 6, 9 and 12 h, respectively after injection. The collected samples of blood plasma were analyzed using enzyme-linked immunosorbent assay for quantitative determinations of Follicle-Stimulating Hormone (FSH) and Luteinizing Hormone (LH). A significant increase in the cell counts over the initial seeding density of 4.1 × 106/ml after 12 h of culture was established in each of the three culture media used. The induced spawning bio-assay which served as a biochemical marker for gonadotrophin specific function showed that 97.5 g/kg of mature oocytes were spawned from cultured pituitary cells (CPC), 127.5 g/kg from induction with fresh pituitary gland (FPG) and 157 g/Kg from gonadotrophin releasing hormone analogue (Ovaprim) induced catfishes (800±200 g). The fertilization rate of cultured pituitary cells (CPC) differed significantly (P 0.05). The results of the plasma gonadotrophin revealed that the highest levels of plasma LH and FSH were reached between 9 and 12 h of ovulation in all the inducers used. The two pituitary based hormones (FSH and LH) played complementary roles during ovulation and spawning of catfish eggs. This study provides an insight to the possibility of using hormones from the primary culture of pituitary cells to induce spawning in African catfish. \u0000 \u0000 Key words: Pituitary cells, primary culture, induced spawning, ovulation.","PeriodicalId":415026,"journal":{"name":"International Journal of Fisheries and Aquaculture","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127523630","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}
M. Moorthy, Sundaramanickam Arumugam, Thankappan Ajith Kumar Thipramalai
This study reports the first occurrence of exotic loricariid catfish Pterygoplichthys disjunctivus, introduced for aquarium, in tributaries and fed pond of Cauvery River, Thiruvengadu, Tamil Nadu (South India). The morphological features of P. disjunctivus samples are given and compared with closely related species of the same genus. The observed invasive species is highly aggressive in nature and it was reported to represent about 80% of the total fish community of the study area, reflected the depletion of fish. The impacts of this species on the biodiversity of native fishes in inland water body are also reported. Key words: Loricariid catfish, Cauvery basin, native species, alien fish species.
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