Research Papers/Topics in Fisheries

Effects Of Broodstock Sex Pairing Ratios And Resting Periods Of The Nile Tilapia Oreochromis Niloticus (Linnaeus, 1758) On Fry Production

ABSTRACT The Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) forms about 80% of farmed fish in Ghana. However, the unavailability of its seed all year round for culture is a major constraint. This study evaluated the effects of varying male to female broodstock pairing ratios of 1:1, 1:2 and 1:3 with resting intervals of 0, 3 and 7 days on fry production performance of the Akosombo strain of the Nile tilapia at the Ashaiman Aquaculture Demonstration Centre, Ghana. Nine (9) trea...

Impacts of Pollution on the Feeding, Bioturbation and Biomass of the Fiddler Crab, Uca annulipes (H. Milne Edwards) in Gazi and Mikindani Mangroves, Kenya.

ABSTRACTMarine pollution is one of the main anthropogenic factors identified globally to affect the estuarine and coastal ecosystems. One of the recipients of pollutants is the mangroves since they are intercepting between land and ocean. In recent years, the mangrove forests have been proposed for use as natural wastewater treatment wetlands. This is based on research findings conducted in countries like China. However, before promoting the use of natural mangrove as pollution buffers, the e...

Characterization And Control Of Pathogenic Parasites In Nile Tilapia (Oreochromis Niloticus Linnaeus 1758) In Fish-Farming Systems In Bungoma County, Kenya

ABSTRACTIn Kenya, fish farming has been expanding in recent years, with Government support through financial and input subsidies to small scale farmers. The sub sector generates a variety of benefits such as food and nutrition and develops trade. However, the sub sector faces the challenges of fish diseases, given that the fish production facilities support high-density living conditions that are favorable for spread of parasitic diseases. Besides, when fish that is infected is consumed by hu...

Effects Of Probiotics On Growth, Flesh Quality And Hematoimmunological Status Of Cultured Nile Tilapia (Oreochromis Niloticus) In Kirinyaga County, Kenya

ABSTRACTNile tilapia (Oreochromis niloticus) culture in Kenya is mainly conducted in low input ponds where supplementary feed is given alongside pond fertilization. Excess nutrients in the culture water in form of nitrogen (N) and phosphorus (P) may make the culture environment susceptible to invasion by disease-causing microorganisms. In the recent past, probiotics have received much attention as a new strategy in fish health management and have been documented to im...

Hydro-Biology And Fish Production Of The Black Volta Near The Bui Dam During The Pre- And Post-Impoundment Periods

ABSTRACT The hydro-biology of the Black Volta near the Bui dam were studied in relation to fish production as measured by catch per unit effort (CPUE) during the pre- and post-impoundment periods between February 2011 and December 2012. The primary objective was to assess the ecological impacts of the dam on the hydro-biological factors and fish production and provide data for monitoring the hydro-biology and fisheries of the Bui reservoir. Two sampling stations at Bui and Bamboi were s...

Nutritional Composition Of Wild And Hormone Sex Reversed Nile Tilapia(Oreochromis Niloticus)

ABSTRACT The study was conducted to evaluate the nutritional composition through analysis of wild and hormone treated Nile Tilapia, Oreochromis niloticus. The fifteen samples of each wild and sex reversed were measured. The mean weight of wild species samples were (225.9 ± 19.9 g), while sex reversed samples were (169.9±46.3 g) with, significant difference (𝑝 < 0.05). The result of chemical composition presented was as mean percentage to moisture, Fat, Crude protein and Ash all...

Impact Of Fish Introduction In Al Rahad Turda - North Kordofan - On Local Communities Development

Abstract The present study was conducted at Al Rahad Turda North Kordofan State. The main target of this study was to investigate the impact of fish introduction in Al Rahad turda on the development of the local community mainly the impact on the fisher men and fishing activity, the impact on market mediators and fish marketing and to study the impact on fish consumption .For data collection three questionnaires were designed for fishermen, market mediators and final consumers. Descrip...

The Role of Fisheries' Marketing Extension on Development of Nile Fisheries' Production and Marketing Case study of Fishermen and Merchants in Almorda Market – Omdurman Locality – Khartoum St

AbstractThe purpose of the study was to study the role of fisheries' marketing extention on development of nile fisheries' production and marketing for fishermen and merchants in Almorda fish market in Omdurman Locality in Khartoum State. To achieve this purpose adescriptive analytical approach was used to collect the field data. And A systemic random sampling approach was used to select a sample size of 100 Respondents (50 fishermen and 50 merchant( in Almorda Fish Market in Khartoum ...

Some Fisheries Biological Aspects For Two Fish Species In Khashm El. Girba Reservoir

AbstractThe data used in This study was collected from Khashum El Girba during the period (November 2016 to December 2017) to show the variation in the total landings for major fish species, to estimate the length - weight relationships O. niloticus and L. niloticus with the condition factor and to indicate the spawning seasons of O. niloticus and L. niloticus depending on the (b) values from the length - weight Relationships .The Total landings during study period show the highest lan...

Quality Attributes, Minerals and VitaminsContents Of FishPatties

ABSTRACTThis study was conducted to assess the effect of fish species and waterenvironment on chemical, physical, mineral, vitamin and organolepticproperties of fish patties Malpetrauselectriccus(A) andTetradonfahaka(B), which were usedin the study. Samples were collectedfrom three different water environments River Nile, White Nile and BlueNile.After collected the fresh fish patties were formulated as twogroups(A and B) .The chemical analysis showed that, the protein, moisture, ashc...

Fish Nutrition and the Economic Way to Feed Fish

BACKGROUND The aim of most farmers has always been to 1 maximize their gains and break even within the shortest possible period. However, no healthy animal can develop optimally without being adequately well fed. Fish are normally fed collectively without special monitoring of individual fish feeding behaviour or agility. Thus, it must be ensured that an adequate quantity of feed is served periodically without (much) wastage. Feed may be served based on an estimated fish biomass (tot...

Assessment of Mineral Composition of Molluscan Shells in South-Eastern Nigeria

Standard methods of analysis were used to determine the mineral and nutrient content of the molluscan shells. The mean and variance of each nutrient were determined.The shells contained high percentage of calcium of 12.35 to 15.07% (13.90±0,26) sodium 0.10 to 1.55% (0.705±0,16) magnesium 0.10 to 1.02% (0.44±0.009) phosphorus 0.18 to&nbsp;0.63 (0.35±0.005) potassium 0.003 to 0.021% (0.012±0.002). The molluscan shells also has large proportions of crude protein with values of 1.49-3.76% (2...

Growth Responses of Oreochromis nilotleus (L.) Fed Diets Containing Mucuna Meal at Different Inclusion Levels

ABSTRACTThis study was undertaken to assess the potential for including mucuna meal as a partial replacement for locally available fish meal in diets for Oreochromis niloticus (L.). Seven groups o± fish were fed prescribe diets at 4% body weight once a day for 56 days. The water temperature and p remained essentially the same during the experiment at 29°C and 6.8 respectively. Fish meal was the only source of supplemental protein in the control rati(i.e diet 1). Diets 2, 3 and 4 had part of...

Induced Breeding Of The African Catfish (Clarias Gariepinus Burchell, 1822) Under Varying Brood Stock Ratios Using Ovaprim

ABSTRACT Modern methods of producing African catfish (Clarias gariepinus) fingerlings require that the male brooder is sacrificed to obtain milt for artificial fertilization of the eggs stripped from the female under hormonal induction. The objective of this research was to study the semi artificial technique of producing catfish larvae with different brood stock ratios using Ovaprim. The experiment was made up of three (3) treatment groups and each treatment had three (3) replicates ea...

Evaluation of Farm-Made and Commercial Fish Diets for Hapa Culture of Nile Tilapia (Oreochromis niloticus L.) in Ghana

ABSTRACTOne of the major constraints to aquaculture development and expansion in Ghana is affordable nutritionally balanced and cost effective fish diet. Although some fish farmers produce their own farm-made fish diets, these diets do not meet the nutritional requirements of the cultured fish as the farmers do not follow the appropriate feed formulation protocol. This study was carried out to generate information on the commercial fish diets and feed ingredients currently used by small-scale...


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