Fisheries Society of Nigeriahttp://hdl.handle.net/1834/174872024-03-28T10:00:41Z2024-03-28T10:00:41ZCollection of broodstock and juveniles of Macrobrachium vollenhovenii from the wildAnyanwu, P.E.Ayaobu-Cookry, I.K.Ebonwu, B.I.Hamzat, M.B.Pepple, P.C.G.Ihimekpen, A.F.Matanmi, M.A.Ikoyo-Eweto, G.O.Afolabi, E.S.Abass, M.A.Bensi, B.L.Ajijo, M.R.Abdullahi, M.M.Achilike, N.M.Tafida, A.S.http://hdl.handle.net/1834/390952021-07-15T03:14:45Z2013-01-01T00:00:00ZCollection of broodstock and juveniles of Macrobrachium vollenhovenii from the wild
Anyanwu, P.E.; Ayaobu-Cookry, I.K.; Ebonwu, B.I.; Hamzat, M.B.; Pepple, P.C.G.; Ihimekpen, A.F.; Matanmi, M.A.; Ikoyo-Eweto, G.O.; Afolabi, E.S.; Abass, M.A.; Bensi, B.L.; Ajijo, M.R.; Abdullahi, M.M.; Achilike, N.M.; Tafida, A.S.
A total of 457 broodstock and 143,000 juveniles of Macrobrachium vollenhovenii were collected at Isheri Olofin area and Okunmanya River over a period of time. They were transported live to the shrimp hatchery of NIOMR in Lagos. Live transportation of the broodstock of M.vollenhovenii with body weight ranging from 71.0-264.5g in liter-capacity plastic containers half-filled with water, recorded 98-100% survival rate between 80-110 minutes transportation time. However, live transportation of the juvenile in 50 liters capacity plastic containers without water recorded survival rates ranging from 20-66% while those carried with water and aerated recorded 12.5-93.75%. An air conditioned vehicle was used during the live transportation. Higher mortality rate was recorded for the juvenile than the broodstocks due to large number transported in additoin to the small-size gear used for trapping the jiveniles. The study has developed a simple technology for the collection and transportation of live specimens of broodstock and juveniles of M. vollenhovenii. Efforts will be made to increase survival of the juveniles through the use of larger containers and gears.
2013-01-01T00:00:00ZEffects of spices on the chemical properties of hot-smoked catfish (Clarias gariepinus)Ayeloja, A.A.George, F.O.A.Akinyemi, A.A.Atanda, O.O.http://hdl.handle.net/1834/390922021-07-15T03:14:26Z2013-01-01T00:00:00ZEffects of spices on the chemical properties of hot-smoked catfish (Clarias gariepinus)
Ayeloja, A.A.; George, F.O.A.; Akinyemi, A.A.; Atanda, O.O.
Effect of spices on the chemical properties of hot-smoked catfish (C.gariepinus) was examined. The experimental design was complete randomized design (CRD) with the treatments been the variously spiced hot-smoked catfish (garlic, ginger, garlic-ginger homogenate spiced and the control without spices). Proximate and mineral content analyses were carried out using standard experimental procedures. There exist significant differences (p<0.05) in the percentage moisture and crude protein content with smoked catfish without spices having the highest moisture content with mean value 6.18 ~c 0.13 and 79.44 ~c 0.13 respectively which could be as a result of the increase in the fibre content of the spiced fish products which is a function of fibre content of the spices applied to the fish products. Similar trend was also observed for the lipid and ash contents the fish products. There exist significant differences (p<0.05) in the mineral content preseent in the various fish products with the exception of magnesium. The products are rich in calcium and other minerals with garlic-ginger homogenate spiced product having the highest level of calcium (0.980 ~c 0.02).
2013-01-01T00:00:00ZImpact of calcium carbonate on the juveniles of brackish river prawn, Macrobrachium marobrachion under laboratory conditionsOkobgue, B.C.Ansa, E.J.Hart, A.I.http://hdl.handle.net/1834/390932021-07-15T03:14:32Z2013-01-01T00:00:00ZImpact of calcium carbonate on the juveniles of brackish river prawn, Macrobrachium marobrachion under laboratory conditions
Okobgue, B.C.; Ansa, E.J.; Hart, A.I.
The acute toxicity and the effect of sub-lethal concentrations of calcium carbonate on the morphology of M. macrobrachion were investigated under laboratory conditions. The prawns were exposed at 0, 160, 320, 640, 1280, 2560 and 5120 mg/l of CaCO3 using static renewal bioassay for 96 hours for the acute toxicity test. The prawns were also exposed for the chronic test at 0, 20.0, 40.0, and 80.0 mg/1 for a period of two weeks. Mortality occurred in the bioassay tanks at random and the bioassays were monitored throughout the exposure period. Results showed that exposed prawns were not significantly impacted when compared with the control group and correlations were significant at P<0.05. There were no mortalities in the tanks with the highest concentrations while one death was recorded in the control tank and in the tank with the 160 and 320mg/1 of CaCO3 respectively. The gills of exposed prawns were analyzed using photomicrography and the results showed that the organs had their normal morphological status after the exposure time, implying that CaCO3 is non-toxic to M. macrobrachion. The applications of the result to prawn culture and water quality management were discussed in details.
2013-01-01T00:00:00ZRe-maturation of spent female broodstock of Macrobrachium vollenhovenii fed trash fishAnyanwu, P.E.Ihimekpen, A.F.Pepple, P.C.Ebonwu, B.I.Hamzat, M.B.Ayaobu-Cookey, I.K.Matanmi, M.A.Afolabi, E.S.Ajijo, M.R.Ikoyo-Eweto, G.O.Abdullahi, M.M.http://hdl.handle.net/1834/390942021-07-15T03:14:39Z2013-01-01T00:00:00ZRe-maturation of spent female broodstock of Macrobrachium vollenhovenii fed trash fish
Anyanwu, P.E.; Ihimekpen, A.F.; Pepple, P.C.; Ebonwu, B.I.; Hamzat, M.B.; Ayaobu-Cookey, I.K.; Matanmi, M.A.; Afolabi, E.S.; Ajijo, M.R.; Ikoyo-Eweto, G.O.; Abdullahi, M.M.
Gravid female broodstock of M. vollenhovenii were collected from Ogun River. Their body weights ranged from 17.2g, 22.4g and 17.4g while the total lengths ranged from 9.7cm-11.7cm. The broodstock were stocked in three plastic tanks and allowed to spawn naturally. Three spent female broodstock were stocked separately in plastic tanks containing six (6) litres of freshwater. They were fed trash fish twice daily at 5% body weight. The spent females started to develope eggs again in 21 days with full maturation at 35 days. The body weights after 35 days ranged from 8.5g-24.1g while the total lengths ranged from 11.4-11.9 cm. The result obtained have shown that spent female broodstock of M. vollenhovenii can become gravid again in plastic tanks in 35 days when fed fresh trash fish. This will ensure all year round production of broodstock for development of M.vollenhovenii.
2013-01-01T00:00:00Z