Research Papers/Topics in Fisheries and Aquaculture

Ecto- And Endo-Parasites Of Silver Kob (Argyrosomus Inodorus) From Northern Namibia (21° - 24°S)

Abstract The silver kob (Argyrosomus inodorus) has been identified as a candidate species for finfish culture due to its outstanding qualities. There is little information available on the health of this species, especially parasite infestation that can pose a threat to fish cultivation and therefore to the success of mariculture. This study was thus designed to provide information on parasites that are affecting this species. Silver kob were collected monthly (2017–2018 for 11 months) usin...

Evaluation of nile tilapia (oreochromis niloticus, linnaeus 1758) fingerling production at the aquaculture demonstration centre - ashaiman, ghana.

ABSTRACT The Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) fingerling production is important for the continual expansion of the global tilapia aquaculture. This study evaluated the Akosombo Strain Nile tilapia fingerling production at the Aquaculture Demonstration CentreAshaiman, Ghana. A total of 1350 female brooders of mean weight 150.7±41.8 g and 450 males of mean weight 218.6±63.1 g were stocked into nine outdoor concrete tanks of size 50 m2 each in a sex ratio of 3:1 respectiv...

Growth Performance Of Clarias Gariepinus Juveniles Fed Processed Almond (Terminalia Catappa Linnaeus) Kernel Meal

ABSTRACT Increasing cost of feedstuff due to competition between livestock and human necessitates research into Low-Cost Unconventional Feedstuffs (LCUF) for profitable fish farming. Almond kernel has been reported to be nutrient-rich feedstuff for livestock; however information on the potential of almond (Terminalia catappa) as a LCUF has not been well documented in aquaculture. Therefore, the use of almond kernel meal as a replacement for soybean meal in the diet of Clarias gariepinus was i...

Effect Of Pawpaw (Carica Papaya) Seed Meal On Growth Performance, Feed Utilization, Survival And Masculinization Of Sexually Undifferentiated Three Spotted Tilapia (Oreochromis Andersonii) Fr

ABSTRACT The objective of this study was to determine the effects of dietary Carica papaya seed meal supplementation at different levels on growth performance, feed utilization, survival rate and sex ratio of sexually undifferentiated three spotted tilapia (Oreochromis andersonii) fry. Six treatments (replicated thrice) were designed based on the control (basal diet), 17 α-methyltestosterone (MT) (60 mg) and C. papaya seed meal incorporated into tilapia feed at 5, 15, 25 and 35 g / kg diet ...

Haematological Changes of Clarias Gariepinus Juveniles Fed Different Dietary Lipids

ABSTRACT Twelve weeks feeding trial was conducted to determine the effects of different dietary lipid sources on the hematological changed in Clarias gariepinus juveniles.

Microsatellite markers in Aquaculture: Application in Fish population genetics

Abstract: Microsatellites or Simple Sequence Repeats (SSRs) represent an abundant source of genetic markers which are highly abundant and dispersed evenly throughout eukaryotic genomes. They have become the markers of choice for a wide range of applications in population genetic, conservation and evolutionary biology. Microsatellites represent ideal molecular markers because they have multiple alleles which are highly polymorphic among individuals. Polymorphism is achieved by having variable ...

Livelihood Diversification Of Fisherfolks In Communities Around Oyan And Ikere Gorge Dams, South Western Nigeria

ABSTRACT Fishing as the main source of livelihood by artisanal fisherfolks is declining due to climatic changes and over exploitation. Fishing income can no longer meet fisherfolks‟s needs. Alternative sources of livelihood in addition to fishing are now being explored by fisherfolks. However, information on livelihood diversification in Oyan and Ikere Gorge has not been adequately documented. Therefore, livelihood diversification of fisherfolks around Oyan and Ikere Gorge reservoirs in Ogu...

GROWTH PERFORMANCE OF FRY AND FINGERLINGS OF OREOCHROMIS NILOTICUS FED ON DIFFERENT AGRO-INDUSTRIAL BY-PRODUCTS

ABSTRACT The study was conducted at the Aquaculture Research and Development Centre at Akosombo to observe the growth performance of fry and fingerlings of O. niloticus; and also assess the cost-effectiveness of the different dietary treatments. In experiment 1, four isonitrogenous (36% crude protein) and isoenergetic (gross energy 18 MJ/kg) diets were formulated to contain agro-industrial by-products including: wheat bran (diet 1), pito mash (diet 2), rice bran (diet 3) and groundnut bran (d...

Evaluation of African Catfish Clarias gariepinus Responses to Graded Level of Zinc Practical Diet

ABSTRACT Fisheries and aquaculture contribute significantly to food security and livelihood; fish and fish products are projected as being among the most widely traded food.

ASSESSMENT OF AQUATIC ECOSYSTEMS, THE FISHERY AND SOCIO-ECONOMICS OF A COASTAL AREA IN THE SHAMA DISTRICT, GHANA

ABSTRACT The study provides requisite scientific and socio-economic data for sustainable management of the fishery and aquatic ecosystems at Anlo Beach in the Shama District, Ghana. Physico-chemical conditions, macrozoobenthic fauna, and the fish and fishery characteristics of River Pra Estuary, the associated wetlands and marine waters were studied from February 2012 to December 2013. Economics of the fishery, governance and other livelihood activities were also investigated. Data were part...

Bioassay using the water soluble fraction of a Nigerian Light Crude oil on Clarias gariepinus fingerlings

Summary A 96-hour bioassay was conducted using the water soluble fraction of a Nigerian light crude oil sample on Clarias gariepinus fingerlings. 0, 2.5, 5.0, 7.5 and 10 mls of water soluble fractions (WSF) of the oil were added to 1000 litres of de-chlorinated tap water to form 0, 25, 50 , 75 and 100 parts per million representing treatments 1 to 5 respectively. Each treatment had two replicates with fifteen fish per replicate. At the end of the 96-hour period of exposure, the fish were tra...

ASPECTS OF THE BIOLOGY OF THE NILE TILAPIA (OREOCHROMIS NILOTICUS L.) IN THE WEIJA RESERVOIR (GHANA)

ABSTRACT Studies on aspects of the biology of the Nile tilapia (Oreochromis niloticus L.) were undertaken in a man-made lake, the Weija reservoir in Ghana from September 2007 to August 2008. A total of 657 specimens of O. niloticus from commercial landings were examined of which 357 were males and 300 were females (sex ratio of 1: 0.84; P < 0.05). GSI was low in December 2007 and August 2008 and highest in March and May 2008. Fluctuations in the GSI, suggested that O. niloticus spawned thro...

Performance and Antimicrobial Potentials of Onion (Allium Cepa Linn) Bulb and Walnut (Tetracarpidium conophorum Mull. Arg) Leaf in the Diet of Clarias gariepinus Burchell, 1822

ABSTRACT High cost of conventional feedstuffs and competition between livestock and fish for ingredients necessitate research into low cost, non-conventional feedstuffs for profitable fish farming. In aquaculture, the emphasis is on producing feeds that promote growth and health of fish. There is scanty documentation of the potential of onion (Allium cepa) bulbs and walnut (Tetracarpidium conophorum) leaves in fish production. The growth performance of Clarias gariepinus on diets containing ...

Crossing, Sex Reversal and Reproductive Capacity of Two Populations of Sarotherodon Melanotheron (CICHLIDAE) From the Central Region of Ghana

ABSTRACT The study investigated whether progeny of Sarotherodon melanotheron from two different populations would have higher reproductive capacity and also exhibit desirable aquaculture traits. Broodstock of S. melanotheron were collected from Kakum Estuary and Benya lagoon and bred to the second filial generation stage. Reproduction was higher in the parents from the Estuary than those from the lagoon. Water quality parameters were within the acceptable range for fish culture. Three diffe...

Aspects of the Ecology of Etse Lagoon: Implications for Small Scale Fisheries Management at Abandze, Ghana

ABSTRACT Aspects of the ecology and spatial context of Etse Lagoon at Abandze, in the Central Region of Ghana were studied from April 2014 and March 2015. Water temperature ranged from 24.0 ⁰C to 36.6 ⁰C (mean = 29.43 ± 0.12 ⁰C). Salinity varied from 0.72 ‰ to 22.30 ‰ (mean = 13.42 ± 0.30 ‰), pH from 4.6 to 8.9 with a mean value of 7.6 ± 0.03, DO from 1.65 mg/l to 11.15 mg/l with a mean value of 5.08 ± 0.08 mg/l and conductivity from 7.35 mS/cm to 43.3 mS/cm with a mean value...


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