Recursos de colección

Aquatic Commons (41.069 recursos)

The Aquatic Commons is a thematic digital repository covering the natural marine, estuarine /brackish and fresh water environments . It includes all aspects of the science, technology, management and conservation of these environments, their organisms and resources, and the economic, sociological and legal aspects.

Type = Conference or Workshop Item

Mostrando recursos 1 - 20 de 632

  1. Perception of fish farmers to climate change and adoption strategies in Oyo State, Nigeria

    Fregene, B.T.; Ogunika, O.F.
    The study identified the perception of fish farmers in Oyo State to climate change as well as the adaptation strategies used by them. A two stage stratified sampling method was used to select 156 fish farmers from the four Agriculture Development Programme (ADP) zones and eight local government areas (LGAs) in Oyo State. Structured questionnaires were administered to the fish farmers. Descriptive statistic and linear regression were used to analyses data collected. The result shows that majority were males (84.0%\}, dominant age (66.0%) were within the age bracket of 46-65 years. The farmers are literate as 46.8% have attained secondary...

  2. Socioeconomic analysis of fish farming in Ogun State, southwest Nigeria

    Olasunkanmi, J.B.
    Fish farming as an economic activity in Nigeria is predominantly an extensive land based system practiced at subsistence level in water. The socio-economic analysis of fish farming in Ogun State, South-Western Nigeria was carried out using data collected from sixty randomly selected fish farms. Data were analyzed using descriptive statistics, costs and returns, as well as regression analysis. The relationship between fish output and five inputs: feed, fertilizer, lime, labour and fingerlings were measured using Cobb-Dou production model. Results suggest that a unit increase in feed application contributed 68 percent increase to the profitability of the farms and this was...

  3. The role of women in fishery activities in some coastal communities of Rivers State, Nigeria

    Cliffe, P.T.; Akinrotimi, O.A.
    Fisheries activities in 10 communities of Rivers State were investigated to determine the role of women in its development and sustainability. Two hundred structured questionnaires were randomly distributed in three communities (20 per community) across three Local Government Area of the State. The results from the study indicated that young and married women are actively involved in fisheries activities on part-time basis, when compared to the older ones. In the study area, women are mainly involved in the marketing of fishery products than processing or active fishing. Women are more involved in picking of shellfishes such as oyster, periwinkle at...

  4. Communication strategies / matrix for stakeholders' adaptation to climate change issues in Nigeria

    Yarhere, M.
    Over the years, man has exploited the ocean and its resources for sustainable livelihood. Man's indigenous and traditional knowledge has been the mainstay and guidance in exploiting the ocean and coastal resources. However, as industrialization and other climate conditions set in to alter or modify the productivity of the ecosystem, there has been a lot of concern by international, regional and local authorities to continuously study the prevalence of these factors and triggers off these climatic changes and their impacts on livelihood of fisherfolks at the industrial or artisanal level of fishing and other fisheries activities like fish farming and...

  5. Public relations and extension services in Nigerian fisheries industry

    Bolarinwa, J.B.
    The paper discussed the importance of fish as a food commodity and the rich icthyofauna resources of Nigerian territorial which has not been optimally utilized to be sustainable. Among the challenges facing the fisheries subsector of Nigerian economomy apart from overfishing, poor post-harvest technology and high incidence of sea piracy is poor level of communications, public relations, restricted access to extension services especially to the rural artisanal fisherfolks/fish farmers in Nigeria . This has been identified as contributory to the increasing shortfall between demand and supply of fish in Nigeria. There is a need/or a good public image fisheries concerns....

  6. Poverty and inequality among fishing households and implications for fishery resources management in Kainji Lake, Nigeria

    Tafida, A.A.; Adebayo, A.A.; Galtima, M.; Arowolo, K.O.
    Fishing has traditionally been a major source of livelihood for fishing households in Kainji Lake Basin (KLB). It plays a significant role to the rural and national economy in terms of employment, income and source of protein. However, the livelihoods of the primary actors (fishers) are being jeopardized by the depletion of fishery resources, mainly due to over exploitation and poor management. This paper examines poverty among the fishing households in KLB using empirical data. Foster Greer Thorbecke (FGT) Model was adopted for the analysis. The results reveal greater poverty (over 60%) with minimal inequality among fishing households. Finally, the...

  7. Fisher folk's response to climate change in New Bussa and its environs of Kainji Lake Basin, Nigeria

    Oluwasegun, T.O.; Landu, E.J.; Oluwasegun, O.M.
    The study examined fisher folk responses to climate change in Kainji lake basin. The sample comprises of fisher folks within and New Bussa. Eighty questionnaires were administered to obtain the primary data and analysed using descriptive and inferential statistical tools. The results revealed that majority (70%) of the respondent were male, however (61.2%) of them had tertiary education. Majority (60%) of the respondents were aware of changes in climate in the area. Majority (65%) and (55%) of the respondents were involved in incidence of deforestation and charcoal production respectively. In conclusion, it was discovered that little knowledge about climate change...

  8. Effects of boiled Jatropha kernel meal as a substitute for soybeans meal in diet of African mud catfish (Clarias gariepinus) fingerlings

    Alatise, S.P.; Ajiboye, G.E.
    A feeding trial was conducted in the laboratory for 8 weeks to evaluate the growth response of C. gariepinus fingerlings using boiled Jatropha kernel as the protein source in place of soybean meal. Four experimental diets (40% crude protein) were formulated, three of these diets contained boiled Jatropha kernel meal at varying levels of 0% 10%, 20%, and 30% while the diet without boiled Jatropha kernel meal served as control. Fish fingerlings were fed weekly at 5% body weight. It was discovered that the percentage weight gain was significantly different (p<0.05) among the controlled diet and the experimental diets; specific...

  9. Comparative study of proximate composition of oil extracted from African catfish (Clarias gariepinus) viscera and red palm oil

    Adetuyi, O.O.; Aladekoye, G.; Akinbobola, A.P.
    The proximate and fatty acid composition of oil extracted from catfish viscera C. gariepinus and red palm oil was carried out in this study, fish oil was extracted using wet rendering method. The result of the proximate composition shows moisture content of 64.81 ~c 2.37% for catfish viscera and 5.75 ~c 1.40% for red palm oil, protein content 16.40 ~c 2.66% for catfish viscera and 3.27 ~c 0.11% for red palm oil, ash content 120 ~c 0.20% and 1.04 ~c 0.30% for catfish ~c 0.10% and 50.40 ~c 0.84%, peroxide value (PV) 16.60 ~c 0.40 and 1.0 ~c 0.42% and...

  10. Whole rocky fresh water prawns, Caridina africana as replacement for fish meal in diets for African catfish (Clarias gariepinus)

    Oyekanmi, F.B.; Omoniyi, I.T.; Akegbejo-Samsons, Y.
    Specimens of Caridina africana were oven dried at 110~'C for 24 hours and refrigerated at 200~'C prior to proximate analysis. Whole rocky freshwater prawn meal (WRFWPM) was evaluated as a dietary replacement for fish meal in the diet of C. gariepinus fingerlings. The diets were fed to triplicate groups of C. gariepinus fingerlings (10.6 ~c 0.08g) reared in concrete tanks, to assess the effects of its partial or complete replacement with fish meal for 90 days. The diets comprised a control which contained fish meal as a protein source; 0% and four others on weight basis at 25%, 50%, 75%...

  11. Haematological changes in the blood of Clarias gariepinus fed Chrysophyllum albidum seedmeal replacing maize

    Jimoh, W.A.; Ajasin, F.O.; Adebayo, M.D.; Banjo, O.T.; Rifhat, A.O.; Olawepo, K.D.
    This study was conducted to investigate growth response of C. gariepinus fed diets containing C. albidum seed-meal replacing Five isonitrogenous diets containing maize which was replaced by C. albidum at a rate of 0,25, 50, 75 and 100% were made. Without C. albidum seed-meal served as the control, experimental diets were assigned randomly to the tanks and each group was fed 5% body weight in equal proportion per day. The fish fed diet 1 had the highest PCV while the fish fed diet 3 had the PCV. There was significant difference (p<0.05) in the PCV of the fish fed various...

  12. Digestible protein sparing effects of digestible lipids in Clarias gariepinus

    Orire, A.M.
    A digestibility trial was carried out on Clarias gariepinus fingerlings 2.25 ~c 0.05g for 4 weeks. The results indicated significant difference (P<0.05) between the gross and digestible diets as out of 20% lipid/protein fed, only 17.75 was digestible. It was this that apparently spared 22.58% out of 30% protein fed for growth. The groundnut oil based diets also showed significant (p<0.05) between the gross nutrients fed and actual digestible. From the result only 16.80/25.22% out of 20/30% dietary oil and dietary protein fed respectively. The palm oil based diets also exhibited similar trend protein/lipid ratio 15/35 only 12.87/29.52 dietary palm...

  13. Growth performance of juvenile Clarias gariepinus fed Ipomoea aquatica based diets

    Odulate, D.O.; Idowu, A.A.; Fabusoro, A.A.; Odebiyi, C.O.
    A feeding trial was conducted to assess the replacement value of I. aquatica-based diet as dietary replacement of maize in the diets of C. gariepinus. Five isonitrogenous diets were formulated to contain 0% (control diet), 15% 30%, 45%, and 60% I. aquatica. Treatment was carried out in triplicate using ten C. gariepinus juvenile per replicate with mean initial weight of 9.0g. The fish at 5% body weight per day for a period of 8 weeks. The best growth response in terms of mean weight gain was obtained in 15% I. aquatica diet inclusion (35.57 ~c 3.44g), while fish fed 60%...

  14. Supplementation of date palm (Phoenix dactylifera) seed as feed additive in the diets of juvenile African catfish

    Sotolu, A.O.; Kigbu, A.A.; Oshinowo, A.J.
    The present study was conducted to examine the utilization potential of date palm seed (DPS) as feed additive in the diet of African catfish Clarias gariepinus for improved fed utilization. A total of 150 African catfish (weight ranged from 81.1 to 91.3g) were divided into five experimental groups. The experiment was conducted for 70 days. Experimental diets were identical in all composition except for the variation in DPS inclusion level. Non-inclusion of DPS was used at 0% (control) and other levels are 0.5% (diet 2), 1.0% (diet 3), (diet4) and 2.0% (diet 5). Growth performance and nutrient utilization of African...

  15. The response of Tilapia niloticus fed on different feeds composition

    Ogunbona, A.A.; Ijimakinde, B.
    Ninety juveniles of Tilapia niloticus were fed on three different composed diets, the locally compounded feeds with fish meal inclusion, (control), the second treatment were fed on imported feed (2) and treatment (3) with locally compounded feed with feather meal inclusion. At the end of eight weeks, it was found out that fish under treatment (1) had the highest feed intake than those of treatment 2 and 3. The weight gained in treatment 2 was higher than 1 and 3. The survival rate were high in this experiment but the means were not significantly different (P>0.05). (The higher survival rates...

  16. Effects of fermented clupeid paste as a substitute for fish meal in the diet of Clarias gariepinus fingerlings in hapa nets

    Fakunle, J.O.; Effiong, B.N.; Alatise, S.P.
    The experiment was conduted to determine the effects of fermented clupeid paste as a substitute for fish meal in the diet of Clarias gariepinus fingerlings in hapa nets. Five (5) diets (40% crude protcein) containing fishmeal substituted with 0% (control), 25%, 50%, and 100% ferment clupeid paste were formulated. The fish fingerlings of mean weight 10.83 ~c 0.37g were fed to satiation at body weight twice per day for 30 days in hapa nets. It was observed at the end of the feeding trial that fish fed with 50% fermented paste along With 50%fish meal gave the highest final weight...

  17. Growth response of Nile tilapia (Oreochromis niloticus) fed graded levels of sun-dried cassava peel meal

    Ojukamaiye, A.S.; Mogaji, O.Y.; Asuwaju, E.P.
    A study was conducted at the farm section of the department of fisheries technology, Federal polytechnic Nekede, Owerri in Factorial design of five treatments of cassava peel meal at 0%, 25%, 50%, 75%, and 100% graded levels were formulated. The casssava peel meal was sun-dried for 48 hours, ground, and added to the feed fed to 150 fingerlings of Oreochromis niloticus into 10 tanks in triplicates, and fed twice daily at 5% body weight for 60 days. The result shows that fish fed with 100% cassava peel meal had the highest mean weight gain of 10.46 ~c 0.0l and specific...

  18. Fisheries survey in Cross River State, Nigeria

    Holzlohner, S.; Nwosu, F.M.
    The survey was performed in the Calabar Municipality, Calabar South, Odukpani, Akpabio and New Bakassi Local Government Areas. Taken as indicator, number of canoes, the largest villages are situated in Akpabio and New Bakassi LGOs and the smallest in Calabar Municipality and Calabar South. The larger villages base economically apart from fishery on oil palm-dominated agriculture. There are villages where each man is a fisher and also a farmer and others, were these main professions are performed by different persons. In the larger villages, there are traditionally operating carpenters (boats builders), hunters, honey samplers and wood cutters. Nearly all women...

  19. The effect of feeding regime and rate on the growth of Clarias gariepinus (Burchell, 1822) fingerlings fed with artificial feed

    Ewutanure, S.J.
    Fish growth is a function of adequate supply of feed in the right quantity and time. The effect of feeding rate on the growth of Clarias gariepinus (Burchell, 1822) was studied for a period of 22 weeks. The fish were fed at the same percentage body weight throughout the study period and a bi-weekly weight gain was measured. Water quality parameters were also monitored. There was a significant increase in weight gain in daily feeding regime than in the ones in two days feeding regime. The increase in weight for the daily feeding regime was visible as from the 8th...

  20. Effects 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...

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