Department Of Marine Sciences

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https://ir.unilag.edu.ng/handle/123456789/3388
From its inception in 1962, the University of Lagos has been identified as a potential centre for the development of Marine Biology and Fisheries in Nigeria. At that time, it was the only University/ Institution in Nigeria situated by the sea and it was obvious that it was most suitable for the development of such disciplines. In the absence of a Faculty of Agriculture and taking full benefit of its location by the sea, lagoon and river, the University of Lagos is one of the very rare institutions in the world suitable for the establishment of a Marine Biology and Fisheries programme.

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Browsing Department Of Marine Sciences by Author "Aarode, O. O."

Now showing 1 - 8 of 8
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    Open Access
    Dietary Effects of Spaghetti Waste as Maize Replacement in the Diet of Juvenile African Catfish, Clarias gariepinus
    (Asian Network for Scientific Information, 2014) Aarode, O. O.; Lawal, M.O.; Aderolu, A.Z.; Seriki, B.M.
    A 56-day experiment was conducted with Clarias gariepinus juvenile to evaluate the effects of replacing maize with Spaghetti Waste (SW). Four isonitrogenous experimental diets were formulated by substituting maize with spaghetti waste at different graded levels of 50, 75 and 100%, respectively with a control (100% maize). The experiment was run in triplicate and fish distributed into 21 plastic tanks. The fish were fed to satiation twice daily and water changed every two days to maintain good water quality. The weight of the fish was determined weekly by bulk weighing. The highest mean weight gain (106.40+4.59 g) and specific growth rate (2.96+0.07) were recorded in fish fed 100% SW, though no significant difference (p>0.05) was recorded between the control and other test diets. There was significant increase (p<0.05) in the feed intake with increased inclusion of the test ingredient. All the analysed blood parameters recorded significant difference (p<0.05) except in the white blood cell. The proximate composition of carcass recorded significant difference (p<0.05) for crude protein, while the ether extract and the dry matter were not significantly different (p>0.05). The highest crude protein (59.33+0.50) was however recorded in 75% SW inclusion. This study showed that maize can totally be replaced with spaghetti waste without any adverse effect on the growth and health status of C. gariepinus.
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    Open Access
    Dietary effects of Sun- hemp (Crotalaria juncea Linn.) in the diet of African catfish, Clarias gariepinus juveniles
    (actaSATECH, 2012) Lawal, M. O.; Aderolu, A. Z.; Adeyemi, B.; Aarode, O. O.
    With an increasing interest in new feedstuff sources, the seeds of wild plants including the tribal pulses are receiving more attention, because of their high resistance to diseases and pests and in addition, they exhibit good nutritional qualities. The seed of Crotalaria juncea was used to replace soybean meal at 5%, 10%, 15%, 20%, 25%, 30% inclusion levels respectively and the control diet was set up without the test ingredient. C. gariepinus juveniles used for the experiment were fed to satiation thrice daily and their water was changed every other day. The weekly feed supplies and weight gains were recorded and used to compute the growth, nutrient utilization and the economic parameters. There were significant differences (P<0.05) in all the growth and nutrient utilization parameters examined. The highest average weight gain (AWG) was recorded in the control treatment (107.69+2.41g) while the least value (66.09+0.48g) was recorded in fish fed with D6 (30%). Similar patterns of results were observed in the other growth parameters as well as nutrient utilization parameters. The best values for Pin, ICA and ECR were recorded in diet 2 after the CTR compared with other dietary treatments. The packed cell volume, white blood cell and haemoglobin were significantly (P<0.05) higher in the control than other tests. Similarly, the control recorded significant (P<0.05) values in the proximate composition of carcass . Sun-hemp seeds do not have any adverse effect on haematological parameters, and carcass proximate composition of the fish. Furthermore, the cost analysis showed that more profit awaits the farmer if diet 2 (10% sun-hemp seed and 20% soy bean inclusion level) is adopted in addition to the medicinal values of the test ingredient.
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    Open Access
    Effects of Pleurotus Tuber-Regium Degraded Rice Husk on Growth, Nutrient Utilisation, Haematology and Biochemical Parameters In Nile Tilapia (Oreochromis niloticus) Fingerlings.
    (Faculty of Agriculture, Nasarawa State University, Keffi, Nigeria, 2015) Aarode, O. O.; Aderolu, A.Z.; Jimoh, W.A.; Lawal, M.O.
    A study was conducted to evaluate the effects of a biodegradation method on the nutritive value of undegraded rice husk (RH) and biodegraded rice husk (BRH) for Nile tilapia fingerlings. Undegraded rice husk (RH) and biodegraded rice husk (BRH) were incorporated into six isonitrogenous (35% CP) test diets 7.5%, 10% and 12.5% inclusion levels against maize. A diet without undegraded rice husk (RH) and biodegraded rice hush (BRH) served as control. The experimental diets were fed to triplicate groups of fish fingerlings (0.81g average body weight) for 70 days. The mean weight gain and specific growth rate of fish across the various inclusion levels were significantly better (P<0.05) than the control except at 12.5% level of inclusion in both RH and BRH. Feed conversion ratio (FCR) increased with the inclusion level of test ingredients (RH and BRH) but no significant difference (P>0.056) between RH diets and the control up to 10% inclusion but for the BRH beyond 7.5% FCR performance became significantly different. Investment cost analysis decreased significantly on addition of both RH and BRH to the different experimental diets. Blood parameters like PCV, Hb and lymphocyte in all experimental diets dropped below the control diet but as the level of the test ingredient increased so thus the above named parameters. Neutrophil on the other hand significantly increased along inclusion level on the RH diets. No regular pattern was observed in the biochemical parameters: alanine transaminase, alkaline phosphatase and aspartate transaminase at the various inclusion levels of test ingredients.
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    Open Access
    Evaluation of soybean meal replacement with sesame seed meal using activated charcoal as an additive in the diet of African catfish juveniles, Clarias gariepinus
    (International Journal of Aquatic Biology, 2016-02-25) Lawal, M. O.; Aderolu, A. Z.; Aarode, O. O.; Seriki, B. M.; Timothy, O. A.
    This study evaluated the effects of 0.25% activated charcoal added to sesame seed meal (SSM) in partial replacement of soybean meal (SBM) of juvenile Clarias gariepinus diet on growth and haematological parameters for 70 day experimental period. Six experimental diets were formulated as: control diet 1 (100% SSM without activated charcoal), control diet 2 (100% SSM plus 0.25% activated charcoal), diet 3 (50% SMB+50% SSM), diet 4 (50% SBM+50% SSM+0.25% AC), diet 5 (30% SBM+70% SSM) and diet 6 (30% SBM+70% SSM+0.25AC). The inclusion of activated charcoal recorded significant improvement in mean weight gain, mean feed intake, specific growth rate (SGR), protein intake (PI) and protein efficiency ratio (PER). The control diet 2 recorded the highest values for growth and nutrient utilization parameters while diet 5 recorded the least values for these parameters. The best values for mean weight gain (65.33±5.57 g), specific growth rate (2.56±0.12% / day) and feed conversion ratio (0.71±0.05) were recorded in fish fed control diet 2 while the worst values (41.30±3.82 g, 1.92±0.11% / day, and 1.07±0.07, respectively) for these parameters were observed with diet 5. However, haematological parameters did not differ significantly across the diets. Thus, from this study 0.25% activated charcoal could favorably be added to the feed of C. gariepinus for optimum performance without any adverse effect on the health status of the fish.
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    Open Access
    Growth and Economic Performance of Clarias gariepinus fed different sources of Calcium and Phosphorus Diets
    (Journal of Fisheries Sciences, 2013) Aarode, O. O.; Yekinni, A.; Lawal, M.O.; Aderolu, A.Z.
    One hundred and fifty juveniles of Clarias gariepinus of mean weight 53 g were stocked ran-domly at seven fish per tank (52.5 X 33.5 X 21 cm3) in triplicate. Seven experimental diets were formulated with varied inclusion levels of calcium and phosphorus sources; Diet 1 (1 % DCP and 1% Egg shell), Diet 2 (2% DCP), Diet 3 (2% Egg shell), Diet 4 (1% Bone meal and 1% Oyster shell), Diet 5 (1% Egg shell and 1% Bone meal), Diet 6 (0.5% Egg shell, 1% Bone meal and 0.5% Oyster shell) and Diet 7 had no extra calcium or phosphorus source. The mean weight gain, MWG and specific growth rate, SGR of the result showed significant difference (P < 0.05) across the test treatments. Diet 2 showed the highest MWG and SGR (63.5 g and 2.13 %/day respectively), it also showed highest value for protein intake (23.09) while Diet 4 had the best values for protein efficiency ratio (3.01) and feed conversion ratio (0.96). Diet 2 (2% DCP) recorded remarkable significant different (p < 0.05) values for the net profit value, investment cost analysis and gross profit for the tested economic indices compared to other di-ets. Therefore, results from the study suggest 2% inclusion level of DCP as optimum require-ment for the growth of C. gariepinus.
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    Open Access
    Growth and economic performance of Nile Tilapia, Oreochromis niloticus (L.) fingerlings fed diets containing graded levels of sclerotium
    (Aquaculture, Aquarium, Conservation & Legislation, International Journal of the Bioflux Society, 2013-01-19) Lawal, M. O.; Aderolu, A. Z.; Aarode, O. O.
    This study was conducted to evaluate the effects of inclusion of sclerotium as a substitute for soybean meal in the diet of Oreochromis niloticus using growth performance, economy of production, haematological and biochemical parameters as indices. Four experimental diets comprising of control (CTR) without sclerotium and other three diets SC1, SC2 and SC3 containing 7.5, 10.0 and 12.5 % sclerotium, respectively. The experimental diets were fed to triplicate groups of fish fingerlings (0.81± 0.00g average body weight) for 70 days. The inclusion of sclerotium at 7.5% level recorded the best values for mean weight gain (MWG), specific growth rate (SGR) and feed conversion ratio (FCR). There was no significant difference (p>0.05) in the incidence cost (IC) and profit index (PI) among the diets however, the best results were achieved at 10% (SC2) inclusion level. The parked cell volume (PCV), haemoglobin (Hb), neutrophil and lymphocyte showed significant difference (p<0.05) between CTR and other three diets while there was no significant difference (p>0.05) in eosinophil among the four diets. Biochemical parameters recorded significant differences (p<0.05) among the four diets. Hence, due to the nutritional and therapeutic characteristics of sclerotium, its inclusion in the diet up to 12.5% could be tolerated by O. niloticus.
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    Open Access
    Utilization of Baker’s yeast (Saccharomyces cerevisiae) in the diet of African catfish (Clarias gariepinus)
    (Science Education Development Institute, 2013) Aarode, O. O.; Aderolu, A.Z.; Lawal, M.O.; Ogunbekun, G.O.
    The contaminants and microbial flora of six branded feeds and feed ingredients purchased from Agege and Ikorodu feed markets in Lagos state, Nigeria were investigated.Hundred gram of each feed and ingredient was weighed in triplicate and spread on a clean sheet of paper to pick the contaminants which were weighed and percentage determined.Maize had the highest percentage (28%), among the ingredients obtained at Ikorodu while blood meal had the highest percentage (27.3%) at Agege. The full fat soybean had no visible contaminant at all, while 72% fishmeal had 0.1% at the two locations. The contaminants in 65% fish meal was significantly difference (P<0.05) compared to other feed ingredients at both markets.The type of contaminants found in individual ingredient varies with the type of feed ingredients which include sand particles, nylon, husk and maize cob. One gram each of the fish feeds and ingredients was separately dissolved in 9ml sterile distilled water. Samples from the serially diluted solution were cultured in agar for identification of microbes.Isolated bacteria were Bacillus subtilis, Staphylococcus aureus, and Escherichia coli while fungi were Aspergillus niger, A.flavus, Mucor sp. and Rhizopus stolonifer. The B. subtilis, was present in all the samples while the percentage frequency distribution revealed the prevalence of B. subtilis and Aspergillus sp. at the two markets. The level of contaminants found in fish ingredients and feeds at the two locations were low with the exception of Aspergillus sp.however, good hygiene is required to avoid or lessen feed contaminations.
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    Open Access
    Utilization of Baker’s Yeast (saccharomyces cerevisiae) in the diet of juvenile African Catfish (clarias gariepinus)
    (Journal of Scientific Research and Development, 2011) Aarode, O. O.; Aderolu, A.Z.; Lawal, M.O.; Alli, O.O.
    A total of 150 juvenile Clarias gariepinus of mean weight (17.14g) were randomly distributed in triplicate of 7 fish per tank. Graded levels of Baker’s yeast were mixed with commercial feed (COPPENS) at 0% (Diet 1), 2% (Diet 2), 4% (Diet 3), 6% (Diet 4) and 8% (Diet 5). Mean weight gain was significantly different with the highest MWG recorded by fish on Diet 3 (174.80g) and least on Diet 1 (116.85g). The least feed conversion ratio (0.56) was recorded in Diet 3 and the highest Diet 1 (0.71). The protein efficiency ratio was highest in Diet 3 (4.28) and least in Diet 1 (3.35) while the highest gross profit of (#1889.0) was recorded in Diet 3. There was no significant difference (P>0.05) in haemoglobin, PCV, Red blood cell, White blood cell, MCH and MCV across the test diets. The result of the organ analysis showed no significant difference (P>0.05) in spleen, kidney, heart, large intestine, stomach, bile, lungs and fat, while liver, small intestine and air sacs showed significant difference (P<0.05). The study showed that inclusion of Baker’s yeast at all levels of inclusion positively enhanced growth performance and feed utilization without any adverse effect on the fish growth and performance, though the best result was recorded at 4% inclusion.