ABSTRACT This 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 ...
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 each. T...
ABSTRACT One 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-scal...
Artificial feeds of different protein levels (20%, 30% and 40%) were formulated and prepared using locally available Agro Industrial By-Products (AIBPs) such as wheat bran, soybean meal, groundnut cake, fish meal, premix and cassava starch. Prepared feeds were fed to three populations of Penaeus notialis Post Larval Shrimps (PLs) under semi-intensive pond conditions for a 24 week culture period. PLs were fed a daily ration administered six hourly at the rate of 10%, 8%, 6%, 4%, and 2%, b...
The outbreak of disease in fish farming has become a worldwide problem. The aquaculture industry in Ghana has seen a major rise in the rate of fish mortality in recent times with significant economic losses. New and emerging diseases maybe associated with these mortalities including the rusty brown spot recorded on cultured Oreochromis niloticus (Nile tilapia). However, there is no much information on the pathological agents associated with the condition. The rusty brown spots have been ...
ABSTRACT The study was conducted in three landing villages along the coast of Greater Accra Region of Ghana, namely; Ada, La and Bortianor from November 2018 to April 2019. The purpose of the study was to assess the abundance of jellyfish in beach seine landings. Biological data was obtained primarily from local fishermen who deployed beach seine net. The jellyfish families that were encountered were four in number and a total of 2,676 individuals from 72 beach seine hauls. These were; Catost...
ABSTRACT A comparative study was carried out into the reproductive and early life growth performance of three stocks of the African catfish, Clarias gariepinus (Burchell 1822) in Ghana under pond culture system at Aquaculture Research and Development Center (ARDEC) in Akosombo in the Eastern Region from January, 2009 to October, 2009. Broodstocks of C. gariepinus were collected from Kumah Farms in Kumasi (Ashanti Region), the Pacific Farms in Ashaiman (Greater Accra Region) and ARDEC at Akos...
ABSTRACT The decreasing availability and increasing cost of fishmeal have called for efforts in evaluating wide varieties of relatively lower cost ingredients that could partially or wholly replace fishmeal. The Black Soldier Fly (BSF), Hermetian illucens larvae hold potential in this regard due to their high protein and fat contents. This study was conducted at the BSF Centre of the Ghana Atomic Energy Commission, Accra, and Aquaculture Research and Development Centre at Akosombo, to evaluat...
ABSTRACT The increased need for energy self-sufficiency has caused an extensive search for various sources of energy (especially, oil and gas) in the marine environment. Globally, the magnitude of impacts of the activities on the marine environment is increasing over the years and most felt on the seafloor. The study of seafloor (benthic) organisms therefore, are vital determinants of impacts on the seafloor. This thesis sought to determine the community structure of nearshore and offshore be...
Abstract Stocking density is an important factor affecting fish production in cages. However, information related to its impact on the growth performance of Nile tilapia Oreochromis niloticus fingerlings during cage culture under the ecological conditions of the Volta Lake in Ghana is limited. Hence, healthy Oreochromis niloticus fingerlings (2.12 ± 0.02 g) were randomly stocked in triplicate 8 m3 cages at densities of 50 fish/m3, 100 fish/m3 and 150 fish/m3 and fed a commercially extruded d...
ABSTRACT Traditional open sun drying method is still the predominant drying method especially for anchovy in Ghana. In this study solar tent dryer (STD) and open sun drying (OSD) methods were used to determine the flesh quality of Engraulis encrasicolus. Fresh fish samples (FFS) were dried using the two methods and the quality of dried anchovy was compared with two different traditional open sun dried samples from Tema (TOSDT) and Accra (TOSDA). It was observed that STD and OSD methods had si...
ABSTRACT Increased absorbance of carbon dioxide from the atmosphere has led to the changing of the chemistry of the oceans. In addition to already existing stressors, the resultant ocean acidification poses multiple threats to marine species biodiversity and goods and services and livelihoods that depend on them. The study set out to determine possible impacts of this phenomenon on the abundance and diversity of fin and shellfish species and ichthyoplankton in the artisanal and semi-industria...
ABSTRACT Genetic characteristics of four populations of the cichlid Tilapia guineensis were studied using allozyme (starch gel) electrophoresis and early life culture performance characterization to generate information on genetic structure and characteristics of major culture performance traits during early life of the species. Samples of the fish populations were collected from three freshwater reservoirs: (i) the Volta reservoir at Kpong, (ii) the Okye-Aminsa reservoir at Akotogua and (iii...
ABSTRACT Coastal erosion is a major challenge facing coastal regions globally. It is projected to increase on regional to global scale as sea levels continue to rise. To manage the situation sustainably, coastal managers require relevant scientific information such as beach sediment and shoreline dynamics. Shoreline change measurement and simulation especially at local scale and at higher resolutions are relevant for decision making and engineering. A review of literature has brought to the ...
ABSTRACT Information on the occurrence and reproductive biology of sea turtles in Ghana is very scanty, therefore there is a need for detailed scientific studies on which their conservation and protection could be based. The present study has shown that the Olive ridley, Leatherback and Green turtles are the three main species that continue to nest on the beaches along the coast of Ghana. The Olive ridley having the highest relative abundance o f 91% at the intensive study area followed by th...