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Assessment of Fish Farmers Use of Recommended Management Practices in Oyo State, Nigeria
The enhancement of fish production through aquaculture can be brought about by enhancing farmers’ utilization of information on new innovations and recommended practices. This study was carried out to assess fish farmers’ use of recommended management practices in Oyo state. One hundred and fifty fish farmers were selected from the four agricultural zones in the state using multistage sampling technique. Primary Data were...
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The aim of this study was to evaluate the effect of different feeding rates and frequencies for angelfish (Pterophyllum scalare) and severum (Heros severus) larvae. For this purpose two similar experiments were conducted in parallel. For each experiment a total of 360 larvae were distributed in 36-1L aquariums, in a completely randomized design with four replicates in a factorial 3x3 design. The feeding rates of 50, 100...
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Fish sustainability involve continuous check-up and feedback to ultimate production and rational utilization of fisheries products in an environment. Stomach composition of Oreochromis niloticus collected from tropical brackish water (Lagos Lagoon) environment was investigated to assess food availability towards optimum fish availability for public rational utilization. Oreochromis niloticus, a fish of high economic...
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Heavy metals concentration in the blood and gills of Clarias gariepinus obtained from two dams (Asa and University of Ilorin), Kwara State, Nigeria was carried out to determine their level of safety for human consumption. Copper (Cu), zinc (Zn), cadmium (Cd), chromium (Cr) and lead (Pb) in blood and gill of species from the two dams were determined using Atomic Absorption Spectrophotometer (AAS). Blood and extracted gills...
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The study was conducted to identify the fishery systems, challenges and opportunities of fishery system in Denbi reservoir. To generate data interview, focus group discussion and personal observations were used. Households nearby the reservoir, key informants and elders, workers of the reservoir and fishery cooperative members were selected and included in the study. The collected data were analyzed by combining...
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The study was conducted in the Copperbelt and North – Western Provinces which represented the urban and rural strata respectively. A total of two hundred and forty farmers were randomly sampled from the farmer registers kept by the Department of Fisheries (DOF) in the Ministry of Fisheries and Livestock (MFL), Zambia. The main objective of the survey was to determine the productivity of the exotic fish species Oreochromis...
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The freshwater prawn, Macrobrachium vollenhovenii is one of the species that contribute to the fisheries in the Asejire Reservoir in southwest Nigeria, where major causes of environmental degradation that affect species integrity and survival exist. The length-weight relationship and condition factor of 209 berried M. vollenhovenii from the reservoir was studied for a period of six months. The mean total length was...
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Clarias gariepinus is a major cultivable fish species in Nigeria. The method of it seedling propagation and quality of seed produced is therefore crucial. In the present study, the effect of dietary supplementation of aqueous extract of Piper guineense on the milt quality of male catfish, C. gariepinus broodstocks was investigated. 75 male C. gariepinus (mean weight ± 407.5 g) were fed with four diets supplemented with...
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First report of Philometra sp. infestation in Yellow edged lyretail from Indian waters
Studies on the groupers over a two year period showed the prevalence of nematode infestation in gonads during post monsoon months. Incidences of gonad atrophy were also noted leading to isolation of the nematode and identification upto generic level. Variola louti commonly called Yellow edged lyretail is a species contributing to the hooks and line fishery was seen to be infected with Philometroid sp. Seven gonad infecting...
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The study examined the growth performance and morphometric characteristics of a wild against a hybrid strain of Malawian Tilapia Oreochromis shiranus. The objective of the study was to compare growth rates and morphological variations between hybrid and local strain. Three strains were analysed-an F1 hybrid (O. shiranus male X Oreochromis karongae female), F1 (Local) and F1 of wild strain as a control. The fish were...
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The Abundance, Distribution and Diversity of Benthic Invertebrates of Lake Malombe
The benthic zone of Lake Malombe was sampled for invertebrates, fungi and bacteria using an Ekman Grab measuring 15.2cm by 15.2cm. Thirty-six stations were surveyed for macro-invertebrates which were identified to the lowest taxa and enumerated to estimate abundance for the lake. Snails were the most dominant macro fauna, belonging to four genera Melanoides, Bellamya, Bulinus and Lanistes with the mean densities of...
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Effects on Post-harvest Infrastructure Facilities in Fisheries Sector in Tamil Nadu
Fisheries sector plays a significant role in the Indian and Tamil Nadu economy. The fishery sector has transferred from traditional activities into commercial enterprises. The main objectives of this paper are to examine the effects on effects on post-harvest infrastructure facilities in fisheries sector in Tamil Nadu and policy analysis in the state. In the matter of development of post-harvest infrastructure showed...
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Comparative studies of the performance of three genera of the family Cichlidae
A six-month trial was conducted to study the growth performance and survival rates of three different species (Sarotherodon galilaeus, Tilapia zillii and Oreochromis niloticus), belonging to three genera (Sarotherodon, Tilapia and Oreochromis) of the family Cichlidae. Fingerlings were stocked in concrete tanks and fed with 25% crude protein feed at 5% body weight twice daily. O. niloticus attained the highest mean weight...
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Two experiments were carried out to investigate and compare growth, phosphorus availability, digestibility and serum status in juvenile Clarias gariepinus. Two groups of five isonitrogenous and isocalorific diets containing25, 50, 75, and 100 % soya bean meal (oil-extracted) and roasted soya bean meal, respectively, were formulated and supplemented with graded levels of phytase at 0. 250, 500, 750 and 1000 FTU/g. A fish...
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This study assessed the effects of solar tent drying and open sun drying on nutrient content and microbial load of Engraulicypris sardella (local name Usipa), a pelagic cyprinid endemic to Lake Malawi which supports the bulk of artisanal fishery in Malawi. Solar tent dried and open sun dried Engraulicypris sardella contained 63.77±0.12 % and 63.62±0.28 % of crude protein, 22.79± 0.20 % and 22.9± 0.24 % of fat, 6.29 ± 0.10...
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This study investigated the growth, length-weight relationships and condition factor of fish species found in Challawa gorge dam. 10 fish species belonging to 9 families were identified. These were: Bagrus bayad macropterus, Synodontis schall, Oreochromis niloticus, Pollimyrus isidori, Marcusenius senegalensis, Schilbe uranoscopus, Clarias lazera, Lates niloticus, Brycinus nurse and Auchenoglanis occidentalis. Their...
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Modelling is a process by which mathematical expression is used to describe a real quantitative situation in a system. The development of scientific understanding through quantitative expression of current knowledge of a system helps managers and planners to make tactical and strategic decisions. The study was designed to model catches for important cyprinid species (E. sardella) from Lake Malawi. The Box-Jenkins approach...
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The use of duckweed chlorella combination as a protein supplement and the subsequent effects on tilapia fish fry would be a good way of reducing production costs in intensive tank tilapia culture. Thus an investigation was staged to identify the effects of duckweed and chlorella algae as feed supplements on Nile tilapia fry growth under the green water technique. Three experimental treatments were run in two replicates for...
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TO DETERMINE THE SUITABILITY OFAFRICAN CATFISH EFFLUENT AS IRRIGATION WATER SOURCE IN NIGERIA.
The reuse of catfish effluent by irrigation can make a significant contribution to the integrated management of our water resources. The study was done to determine the suitability of African catfish (Clarias gariepinus) effluent as irrigation water source. Forty (40) samples were collected from five ponds. Physical and chemical parameters of catfish effluent samples from selected earthen ponds were determined in...
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A two months feeding trial was conducted to investigate the effect of feeding frequencies (2, 3 and 4 times/day) on growth performance, feed utilization and body composition of Oreochromis shiranus under laboratory conditions. A total of 180 Oreochromis shiranus fingerlings of 9g were stocked in 9 experimental opaque fiberglass tanks of about 150l of water each. The completely randomized design (CRD) was used in this...
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Research on the current situation, problems and Countermeasures of Chinese Aquaculture Logistics
This research aimed to analyze the characteristics of China's seafood logistics, the status quo of China's seafood logistics system and logistics organization pattern of China's seafood logistics, and to evaluate the efficiency of China's seafood logistics, and put forward suggestions.
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It has been reported that Wild L. Victoria Oreochromis niloticus have disappeared from about 40% of their historical breeding ranges. This study was conducted to determine the effect of different microhabitat types on the species distribution and yield performance around Port Bunyala Bay. Physical parameters (Temperature, Total depth and Conductivity) which contributes to the dispersal and yield performance of the species...
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Preliminary Assessment of heavy metal concentration in selected fish feed ingredients
Abstract. Dearth of information exist on the heavy metal concentration (HM) of local fish feed ingredients in Nigeria, thus preliminary investigation on the concentration of lead, cadium (toxic heavy metals), copper, zinc and chromiun(essential trace metals) present in some selected feed ingredients. The two toxic metals; lead and cadium were found in fishmeal at the concentration of 0.30mg/kg each. Cd content in soybean...
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This study was conducted to assess the potential growth promoting effect of Spirulina on Macrobrachium rosenbergii juveniles. The experimental feed crude protein level was maintained at the level of maximum 32 %. The feed was prepared by fishmeal which was replaced with Spirulina powder at 2.5 %, 5 % and 10 % level, its serve as experimental feed. Without Spirulina feed serve as a control feed. The experiment was prolonged...
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