Open Access Original Research Article

Nutritional Quality Differential, Growth and Economics Efficiency of Some Selected Commercial Floating Fish Feeds in Saki West Oyo State Nigeria

M. A. Adedokun, Z. O. Oluwafemi, A. O. Ayanboye, G. Oladipupo

Asian Journal of Fisheries and Aquatic Research, Page 1-8
DOI: 10.9734/ajfar/2019/v4i130043

Nothing is more important than quality nutrition and adequate feeding of fish in captivity. Undernourished fish in terms of nutrient deficiency, cannot maintain its health for proportionate growth regardless the intense of feeding and quality of the environment.

A 49 day-feeding trial was carried out to investigate nutritional quality differential, growth and economics efficiency of some sampled commercially extruded floating feeds, based on frequency of usage among fish farmers in the study area. The sample feeds were sourced from respective distributors covering the zone of study. The feeds were designated as Fd1, Fd2, Fd3, Fd4, Fd5 and Fd6(control), with 3 replicates for each treatment. The examined growth performance, feed utilization and economic efficiency of feeds followed particular trend pattern and significantly different (p<0.05) across the sampled feeds (FW, MWG, SGR, TPI, PER and FCR). Finally, the control diet was least consumed, sustained positive allometry growth pattern  and concomitant marginal profits; than feed 1 and 2 which had sharp drops in the growth pattern of fish after four( 4) weeks.

Open Access Original Research Article

Phytoplankton Diversity and Abundance in Lake Ribadu, Adamawa State, Nigeria

E. I. Hassan, R. Bonjoru, V. R. Ndeham

Asian Journal of Fisheries and Aquatic Research, Page 1-7
DOI: 10.9734/ajfar/2019/v4i130044

This study was carried out to look at the phytoplankton diversity and abundance in Lake Ribadu, Fufore Local Government Area, Adamawa State, Nigeria. The study was carried out for a period of 6 months (July to December 2016). Phytoplanktons sampling was carried out by using the plankton net of mesh size 55µm by hauling horizontally for five meters. Frequency counts, percentages were used to analyzing the phytoplankton species composition and abundance while ComEcolPaC (a Microsoft Excel 2003 based program) was used to analyze the variation in the diversity indices. A total of Twenty one (21) species were observed in the study sites. Bacillariophyceae recorded the highest with the percentage abundance of 37.8% followed by Chlorophyceae with 35.12%, Myxophyceae with 25.82% while Chrysophyceae with 1.53% is the least abundant. The study recommends that Monitoring of the lake by the immediate community and regulation of all anthropogenic activities should be given topmost priority as part of the environmental management policy for the sustainability of aquatic resources of the lake.

Open Access Original Research Article

Culture of Moina macrocopa Using Different Types of Organic Wastes

Kamrunnahar Kabery, Md. Anisuzzaman, U-Cheol Jeong, Seok-Joong Kang

Asian Journal of Fisheries and Aquatic Research, Page 1-13
DOI: 10.9734/ajfar/2019/v4i130045

Moina macrocopa was cultured with different animal manures (chicken manure, pig manure and cow manure) and food waste to determine the impact of these food sources on its mass production. All diets were provided at five different concentrations: 500, 1000, 2500, 5000 and 10000 ppm. Gross and net reproductive rates were higher in 1000 ppm concentration of food waste medium and the highest average population growth was obtained of about 9 org mL-1 whereas pig manure treatment showed the lowest among all the culture medium. The highest population density was observed in low concentration treatments, on the contrary, higher concentrations showed an adverse effect on M. macrocopa cultivation. The results of this study suggest that 1000 ppm concentration of food waste produces better results than other animal manures which showed the highest population density and exhibited a comparatively higher percentage of highly unsaturated fatty acids than the other treatments and could be an inexpensive and sustainable cultivation approach of Moina macrocopa.

Open Access Original Research Article

Mycoflora, Proximate Composition and Mineral Analysis during the Storage of Smoked Dried Crayfish (Penaeus natialis - Shrimps)

Emmanuel Dayo Fagbohun, Ayobami Opeoluwa Durojaiye, Oluwabukola Atinuke Popoola

Asian Journal of Fisheries and Aquatic Research, Page 1-8
DOI: 10.9734/ajfar/2019/v4i130046

This study was carried out to assess the changes in proximate composition, mineral content and mycoflora associated with smoked dried crayfish Penaeus natialis (shrimps) stored for twenty weeks. Smoked dried crayfish Penaeus natialis (shrimps) were purchased at Igbokoda, Ilaje Local Government Market, Ondo State, Nigeria. They were studied under storage for twenty weeks (6 months) and the proximate, mineral and mycofloral analyses were carried out at four weeks interval. The mycoflora were isolated using direct plating and dilution methods on Potato Dextrose Agar (PDA), Saboraud Dextrose Agar (SDA) and Malt Extract Agar (MEA) and identified using their cultural and morphological features with reference to standard procedures accordingly. The fungi isolated using direct plating methods and dilution methods were Aspergillus niger, Aspergillus flavus, Aspergillus fumigates, Rhizopus sp., Phytophthora siskiyouensis, Penicillum sp. and Mucor sp. The proximate analysis result showed a decrease in Ash, fat, and crude fibre content while moisture, crude protein and carbohydrate content increased respectively during the twenty four weeks storage. The mineral analysis result of the smoked dried crayfish Penaeus natialis (shrimps) showed a decrease in Sodium, Potassium, Calcium, Magnesium, Zinc, Iron, Copper, Manganese, Cadmium and Phosphorous respectively. This study showed that the smoked dried crayfish Penaeus natialis (shrimps) were contaminated by fungi; which is an indication that the market places where these products were displayed for sale were not hygienic coupled with leaving the products in open air without coverage which could allow products contamination with fungal spores leading to fungal spores germination, deterioration and spoilage of products during storage.  Good hygiene, constant product checking and sensitization of the products processors, handlers and sellers will minimize exposure to fungal spores’ contamination while mitigating deterioration and spoilage of the products during storage.

Open Access Original Research Article

Assessment of Fish Farming in Plateau State, North Central Nigeria

L. E. Igoche, F. Makwin, T. T. Akpenseun, J. Kaye, F. A. Oyedapo

Asian Journal of Fisheries and Aquatic Research, Page 1-10
DOI: 10.9734/ajfar/2019/v4i130047

World leaders are making concerted effort to tackle the menace of food insecurity brought about by upsurge in human population, climate change and displacement of farming communities due to civil unrest in some part of the world. This study was undertaken to assess the current status of fish farming in Plateau State and suggest possible ways of ameliorating any observed challenges for increased fish production. The study evaluated the challenges affecting fish farming in the study area.

Structured interview schedule questionnaire were used in sourcing information from nine (9) local government areas in the state.  Ninety (90) fish farmers were randomly selected from the nine (9) local governments areas each drawn from the three Agricultural zones of the State. Data obtained were analysed using descriptive statistics.

The findings revealed that majority of the fish farmers 70% were males and between the ages of 21-30 years.

The study also revealed that the major constraints affecting increased level of output in the study area were high cost of inputs (feeds), poor marketing channels, inadequate finance, inadequate access to credit facilities, and poor extension services.

Fish farming in the study area is however, profitable as majority of the farmers made a gross profit margin of above # 501,000.00 per annum.

The study recommends that fish hatcheries and feed mill should be established in the study area and that single digit credit facilities should be granted to interested fish farmers. Also extension services with respect to fish farming should be increased in the study area. A good quality fish market should also be established in the study area to assist the farmers in marketing their produce in order to optimise profit.