International Journal of
Fisheries and Aquaculture

  • Abbreviation: Int. J. Fish. Aquac.
  • Language: English
  • ISSN: 2006-9839
  • DOI: 10.5897/IJFA
  • Start Year: 2010
  • Published Articles: 223

IJFA Articles

Cage fish culture in the lake victoria region: Adoption determinants, challenges and opportunities

July 2021

Fish cage farming was first introduced in Lake Victoria in 2005, however, its adoption and production has not met expectations. It is a promising venture that can help solve the problems of food insecurity, unemployment and alleviate poverty if, a conducive investment environment is put in place.  This study sought to explore the adoption determinants, challenges and opportunities of this technology within the Lake...

Author(s): Mary Orinda, Erick Okuto and Martin Abwao

Water hardness does not influence iodine-induced mortality of rainbow trout eyed eggs

June 2021

To evaluate the effects of water hardness on survival to hatch of eyed rainbow trout Oncorhynchus mykiss eggs during iodophor disinfection, hard (300 mg/L CaCl2) and soft water (20 mg/L CaCl2) solutions were used in combination with iodophor treatments of 0, 100, 200, 400, 800, and 1600 mg/L. Water hardness did not significantly influence egg survival-to-hatch. In addition, there was no significant interaction between...

Author(s): Alex J. Rosburg, Cameron Enright, Jill M. Voorhees and Michael E. Barnes  

Occupational hazards, risk and injuries of fish processors in Tombo a coastal fish landing site, Sierra Leone, West Africa

June 2021

Fish and fish products bear potential hazards and risks of public health concern. A preliminary study of hazards, injuries and risks among fisherfolk in Tombo, Sierra Leone, West Africa was carried out on November 2018. Sixty subjects from among the organized fish processor groups were interviewed with semi-structured questionnaire. Results obtained from the study were analyzed with Microsoft Excel and presented in...

Author(s): Olapade Olufemi Julius, Kpundeh Mathew Didlyn, Quinn Patrick George and Nyuma Grace Janet Yawa  

Enhancing the fisheries sector of African Great lakes: Value chain analysis of the Tanganyika Sardine (Limnothrissa miodon, Boulenger 1906) from Lake Kivu, Rwanda

March 2021

Lake Kivu is experiencing unprecedented decline in production of Tanganyika Sardine (Limnothrissa miodon). This study sought to characterise the value chain of this fish species so as to chart its sustainable utilisation. The study performed in 2015 found two chains; an informal chain that takes 30% of the production and a formal chain that handles 70%. The average catch of sardine was 30 kg/day in the high production...

Author(s): A. Murera, M. Verschuur, and Donald R. Kugonza

Aspects of reproductive indices and enteroparasitic infestation of Clarias gariepinus (Burchell, 1822) in a tropical reservoir

January 2021

The study was carried out between September 2011 and August 2013, using 328 Clarias gariepinus in Oba reservoir, Oyo State, Nigeria. Standard methods were used to determine gonado-somatic index (GSI), fecundity values, and enteroparasitic infestation of the fish. Sex ratio was 1.3:1, male to female, and females on an average invested 20.54% of its body weight in egg production while male GSI was 6.05 ± 0.19%....

Author(s): Olumuyiwa Olasunmibo Ajala and Olatunde O. Fawole

Water activity, microbial and sensory evaluation of smoked fish (Mormyrus caschive and Oreochromis niloticus) stored at Ambient Temperature, Terekeka-South Sudan

December 2020

The effect of smoking kilns on water activity, microbial load and sensory attributes was evaluated to adopt suitable technology that maintains the quality of fish in South Sudan. A total of 300 fresh Mormyrus caschive and Oreochromis niloticus were purchased, 36 fresh samples were iced and the remaining 264 fish samples were divided into two batches for pit and chorkor smoking. The experiment was done twice in a...

Author(s): Borodi Charles Mondo, Peter Akoll and Margaret Masette  

Socio-economic and cultural values of two species of crabs (Cardisoma armatum Herklots and Callinectes amnicola Rochebrune) in Southern Benin, Africa: Management of post-harvest losses and exoskeletons

November 2020

Crabs play an important economic and bio-ecological role in most aquatic ecosystems and occupy an important place in the variety of trophic niches. Callinectes amnicola Rochebrune and Cardisoma armatum Herklots are two edible species widely exploited in Benin. The present work aims to i) evaluate the socio-economic and cultural importance of those two crab species, ii) analyze the dynamics of the value chain, and iii)...

Author(s): Toussaint Mikpon, Durand Dah-Nouvlessounon, Nadège Adoukè Agbodjato, Halfane Lehmane, Olaréwadjou Amogou, Christine N’Tcha, Wassiyath Mousse, Haziz Sina, Hyacinthe Ahissou, Adolphe Adjanohoun and Lamine Baba-Moussa  

Effect of stocking density on growth and survival of Nile tilapia (Oreochromis niloticus, Linnaeus 1758) under cage culture in Lake Albert, Uganda

August 2020

In Uganda fish is a great source of animal dietary protein, however, natural stocks continue to decline. Therefore, aquaculture provides a viable option to bridge the increasing fish supply-demand gap. Accordingly, a study was conducted from March to August 2016 to investigate the effect of stocking density on the growth performance, and survival of Nile tilapia (Oreochromis niloticus) in floating net-cages to...

Author(s): Ivan Abaho, Thaddeus Zaabwe, Andrew Izaara, Howard N. Kasigwa, Norman Mushabe, Steven Byenkya, Mujibu Nkambo, Sylvester D. Baguma, David L. N. Hafashimana and Jackson Efitre  

Use of different colours of vertically-suspended structure during the hatchery rearing of juvenile landlocked fall Chinook salmon (Oncorhynchus tshawytscha, Walbaum)

July 2020

This study investigated the effects of coloured structures on the growth of juvenile landlocked fall Chinook salmon (Oncorhynchus tshawytscha, Walbaum) during hatchery rearing. Structures consisted of an array of four aluminum angles painted one of four colours: Silver, red, black and green, which were vertically suspended in circular tanks. After 25 days, mean total lengths and weights of individual salmon reared in...

Author(s): Misty D. Jones, Jill M. Voorhees, Nathan Huysman, Eric Krebs and Michael E. Barnes  

Is aquaculture production by small-scale farmers profitable in Zambia?

February 2020

The current and anticipated demographic changes worldwide are expected to increase fish and other animal protein consumption. Capture fisheries alone cannot meet these requirements. Aquaculture offers a way out if it can further be developed. However, in most developing countries, aquaculture is still in its infancy and the evidence on the industry is quite thin. We assess the profitability of small-scale aquaculture...

Author(s): Thelma Namonje-Kapembwa and Paul Samboko  

Active surveillance of infection caused by Aphanomyces invadans in Malawi

January 2020

In Malawi, fish is regarded as a cheapest source of animal proteins and other macronutrients. Recent epizootic ulcerative syndrome (EUS) outbreaks reported in countries sharing Chobe-Zambezi river system like Zambia, Democratic Republic of Congo, Botswana, Namibia, Zimbabwe and Republic of South Africa, have posed a major threat to fish production. Malawi’s biggest and important Shire River connects to Zambezi...

Author(s): Barnett Kaphuka, Gilson R. Njunga, Gladson Kamwendo and Brino B. Chirwa  

Microbiota of catfish (Clarias gariepinus) tissues harvested from vials polluted with soil from e-wastes dumpsite

June 2019

In this study the microbiota of Clarias gariepinus tissues harvested from e-waste-soil polluted vials were assessed. Soil samples contaminated with e-waste were analyzed using standard analytical protocol while the microbial study was obtained using standard conventional microbiological techniques. The results revealed that the soil was sandy-loamy and blackish in colour. High organic matter (17.60%) and organic carbon...

Author(s): Adegunloye D. V., and Sanusi A. I.  

Stress evaluation in dourado females (Salminus brasiliensis) submitted to two different methods of induced spawning

June 2019

The goals of this study were to evaluate dourado female egg viability submitted to stress condition caused by two different reproductive induction methods, extruded and semi-natural. Sixteen females randomly chosen were induced with pituitary extract and allocated in two groups; the first, in which oocytes were manually extruded and the second group, females were allowed to naturally spaw. Blood samples were collected...

Author(s): M. A. Zanoni, S. Carvalho, F. G. Costa and F. R. F. Seiva  

Bioeconomic analysis of Engraulicypris sardella (USIPA) in South east arm of Lake Malawi

May 2019

Usipa Engraulicypris sardella is the most abundant small pelagic species in Lake Malawi. It plays an important part in the lake communities’ economy and food security. However, much remains unknown on their stock status and bioeconomic importance. This study is carried out to estimate the maximum economic yield and maximum sustainable yield for Usipa fishery in the South-east arm of Lake Malawi. Structured...

Author(s): Innocent Gumulira, Graham Forrester and Najih Lazar  

The spatio-temporal dynamics of the fish assemblage of the man-made Lake Buyo (Cote d'Ivoire, West Africa)

March 2019

This study aims to characterize the spatio-temporal variation of the fish assemblages in relation to the environmental variables of Buyo Dam Lake. Sampling was performed from July 2017 to June 2018 using experimental fishing and commercial fishing. Spatio-temporal analysis indicated a significant variation (p <0.05) in pH, electrical conductivity, total dissolved solids, and water transparency. A total of 45 species...

Author(s): Binta Eric Pacôme GOLI BI, Tanoh Marius KAMELAN, Kouassi Brahiman KIEN, Siaka BERTE and Essetchi Paul KOUAMELAN  

Socio-economic characteristics of small-scale catfish farming enterprise in Obio/Akpor Local Government Area, Rivers State, Nigeria

March 2019

The study of the socio-economic characteristics of any group is a requirement to a successful implementation of effective government assisted programme. The study examined the socio-economic characteristics, production processes and production constraints of small-scale catfish fishing enterprises in Obio/Akpor Local Government Area in Rivers State, Nigeria. Simple randomized sampling technique was used to select 60...

Author(s): AMACHREE Dokuboba, JAMABO Nene and JOSEPH Dorah E.  

Growth and feed utilization in Clarias gariepinus fingerlings fed on Acacia auriculiformis leaf supplemented diets

March 2019

Effect of ‘Earleaf’ plant (Acacia auriculiformis) as feed additive was examined on Clarias gariepinus fingerlings (4.2±0.5 g) over a period 56 days against farm-made feed which served as the control. A. auriculiformis leaves were collected, air-dried (under shade), powdered and added at varying inclusion levels (0, 0.5, 1.0, 1.5 and 2.0%) to basal diets containing 40% crude protein. Fish were randomly...

Author(s): AFE Oluwafunmilola Eunice and OMOSOWONE Olajumoke Olamiposi  

Value chain analysis of small-scale fisheries in the High Dam Lake in Egypt

February 2019

Although, High Dam Lake small-scale fisheries is an important source of fish for residents of Aswan in Upper Egypt, there is limited information available about the performance of small-scale fisheries value chain. Structured questionnaires with fishers, traders, and processors were used to collect input and output data at each node of the chain. Focus group discussions meeting with stakeholder collected qualitative...

Author(s): Ahmed M. Nasr-Allah, Olfat A. Habib, Malcolm W. Dickson and Harrison Charo-Karisa  

Age, growth and mortality rates of round sardinella, Sardinella aurita (Valenciennes, 1810) from the Senegalese coasts (West Africa)

February 2019

Sardinella aurita is the main species exploited by small-scale fisheries in Senegal and represents an important source of low cost protein in the Senegalese market. The objective of this study was to determine the age, growth and mortality parameters of S. aurita obtained from the Senegalese coastal waters. Age, growth parameters and mortality rates of this species were estimated using FiSAT II (FAO–ICLARM Stock...

Author(s): Alassane Sarr, Ismaïla Ndiaye, Waly Ndiaye, Alioune Faye and Malick Diouf  

Identification of possible causes of fish death in Lake ‘’Lake Kabo’’

February 2019

Any adverse change in the environmental conditions affects the life of aquatic organisms in water. Fish death was suddenly observed in Lake Kabo. To investigate its cause and look for solution, a research team started to consider the Lake. The present study was conducted to identify the reason for the fish deaths that accidentally occur in the lake. To achieve the objective samples were collected from four different...

Author(s): Sefawdin Berta Bedassa  

Effects of feeding rates and feeding frequencies on growth performance, uniformity of the batch and survival rate of Amazon ornamental fish larvae

February 2019

The aim of this study is to evaluate the effect of different feeding rates and frequencies on 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 36-1 L aquariums. The experiments were done using a factorial 3x3 completely randomized design, with four replicates. The...

Author(s): Daniel Abreu Vasconcelos Campelo, Matheus Henrique Correa Marques, Odinilson Pereira Marim, Lorena Batista de Moura, Bruno José Corecha Fernandes Eiras, Marcos Ferreira Brabo and Galileu Crovatto Veras  

The abundance, distribution and diversity of benthic invertebrates of Lake Malombe

February 2019

The benthic zone of Lake Malombe was sampled for invertebrates, fungi and bacteria using an Ekman Grab measuring 15.2 cm by 15.2 cm. 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...

Author(s): Kingsley Kamtambe, James Banda, Barnett Kaphuka and Orton V. Msiska  

Assessment of the fishery, challenges and opportunities of Denbi reservoir in Bench Maji Zone, South Western part of Ethiopia

January 2019

The study was conducted to assess the fishery, challenges and opportunities in Denbi reservoir, Ethiopia. Interview, focus group discussion and personal observations were used to generate data. Response was solicited from households within the catchment area of the reservoir, key informants, elders, workers of the reservoir and fishery cooperative members. The data was analyzed by combining quantitative, qualitative...

Author(s): Askale G/Michael and Tegegn Fantahun  

Assessment of stomach contents of Oreochromis niloticus from the Lagos Lagoon, Nigeria

January 2019

Fish sustainability in an aquatic environment involves continuous and judicious management towards optimum production of resources, for rational utilization and availability for future generation. Stomach composition of Oreochromis niloticus collected from a tropical brackish water environment was investigated to assess food availability towards optimum fish productivity for rational public utilization. Oreochromis...

Author(s): Abidemi-Iromini, A. O.  

Is the culture of exotic fish species the answer to low fish productivity? A case study on the use of Oreochromis niloticus in Zambia

November 2018

The study was conducted in the Copperbelt and North-Western Provinces of Zambia 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...

Author(s): Alexander Shula Kefi and John Mwango  

Otolith morphometry and fish length relation of Amblypharyngodon mola (Ham.) from Middle Ganga region (India)

October 2018

The aim of this study was to determine a correlation between the length, width and weight of otoliths and the length and weight of fish samples of Amblypharyngodon mola (Hamilton,1822), a Rasborine fish caught from Middle Ganga region. Total length (TL) measurements were made with a 1mm precision fish length measuring scale. Image J software was used for measuring otolith length and width. This study shows strong...

Author(s): Neetu Nimesh and Seema Jain  

Performance of Nile tilapia (Oreochromis niloticus) fed with diets containing caffeine

September 2018

The objective of this study was to investigate the possible effects of caffeine on the performance of juveniles of Nile tilapia. One hundred and forty four (144) juveniles of Nile Tilapia with mass, total length and initial mean height of 2.94 ± 0.16 g, 5.19 ± 0.14 cm and 1.49 ± 0.04 cm, respectively, were used. The fishes were housed in 24 plastic boxes in a closed water recirculation system, where...

Author(s): Bárbara de Cássia Ribeiro Vieira, Pedro Pierro Mendonça, Bruno Borges Deminicis, Paula Del Caro Selvatici and Renata Gomes da Silveira Deminicis  

Anaesthetic effects and haematological responses of heterobranchus bidorsalis juveniles exposed to clove oil

September 2018

This study aims to investigate the use of clove oil as an anaesthetic agent for Heterobranchus bidorsalis juveniles and assess the effects on the test fish, using some hematological parameters. Different concentrations of clove oil (0.8 to 1.2 ppm) were used in static water to determine the induction time and recovery time of the test organisms. Behavioral changes of the test fish were observed, the time the fish became...

Author(s): Olufayo M. O. and Ojo O. M.  

Seasonality in the photosynthetic productivity and biomass of phytoplankton in Lake Tinishu Abaya (Rift Valley, Ethiopia): The basis for fish production

August 2018

The present study was undertaken to investigate the photosynthetic productivity and biomass of phytoplankton for Lake Tinishu Abaya to observe the potentiality of the lake water for fish production. The study was carried out from January to December 2016. For the analysis of various physicochemical parameters, water samples collection was taken from two predefined sampling stations (open-water and nearshore). Biomass of...

Author(s): Yirga Enawgaw and Brook Lemma  

Observations on the biology of Nile tilapia, Oreochromis niloticus L., in Tekeze Reservoir, Northern Ethiopia

July 2018

The study was done to examine some aspects of the reproductive biology of Nile tilapia (Oreochromis niloticus) in Tekeze Reservoir a newly man made hydropower reservoir. A total number of 1826 specimens of Nile Tilapia (O. niloticus) were collected from the reservoir from July 2015 to June 2016. Size at first maturity, sex ratio, gonado-somatic index (GSI), breeding season and fecundity were studied. The overall...

Author(s): Tsegay Teame, Haftom Zebib and Tesfay Meresa  

Substitution of the fish meal by the earthworm and maggot meal in the feed of Nile tilapia Oreochromis niloticus reared in freshwater

June 2018

The present experiment was conducted to evaluate the efficacy of dietary protein from maggot meal and earthworm meal to replace fish meal protein in Oreochromis niloticus juvenile feed. The fish used for this experiment come from the experience of the larval phase during which fish were fed with the formulated diets [fish diet (FD), maggot diet (MD) and earthworm diet (ED)] content 40% crude protein and the commercial...

Author(s): Medard GBAI, N’golo OUATTARA, Yacouba BAMBA, Mamadou OUATTARA, Allassane OUATTARA and Kouakou YAO  

Physical, chemical parameters and plankton in a tropical earthen pond catfish farm in Badagry, Nigeria

June 2018

The physico-chemical parameters and plankton abundance of four artificial fish ponds in Omageyu Farms, Ijotun, Badagry, Nigeria was studied and analysed using standard methods monthly from June to December 2015. Water temperature, pH and dissolved oxygen ranged from 27.80 to 32.00°C, 6.90 to 7.40 and 6.80 to 10.00 mg/l, respectively in the four ponds. Water temperature, pH, and dissolved oxygen in Pond A were...

Author(s): Martins Agenuma Anetekhai, Edwin Oritseweyinmi Clarke, Oluwayemisi Adebisi Osodein and Morenikeji Tolulope Dairo

Zooplankton communities as an indicator of ecosystem productivity in Lake Tinishu Abaya, Rift Valley, Ethiopia

May 2018

The ultimate objective of this study was, to explore community structure and biomass of zooplankton in relation to key environmental drivers to bear out the productivity of Lake Tinishu Abaya. Zooplankton samples collection was carried out for a year from January to December 2016 from two sampling sites (open and shore) using 30 µm mesh size net within the euphotic depth. Biomass of zooplankton was anticipated...

Author(s): Yirga Enawgaw and Brook Lemma  

Mortality, recruitment pattern and exploitation rates of two Schilbe Oken, 1817 populations: Schilbe mandibularis and Schilbe intermedius from the Aghien Lagoon; estuarine system of West Africa

April 2018

In Côte d’Ivoire, the Aghien Lagoon is under heavy fishing pressure. Mortality, recruitment pattern and exploitation rate of Schilbe mandibularis and Schilbe intermedius were investigated in this lagoon. Fish samples of both sexes (N = 575) were collected monthly between June 2014 and May 2015 from artisanal and experimental captures. Natural mortality was higher in S. intermedius (M = 0.89 years-1) than in...

Author(s): Sonan Romuald Assi, Koffi Félix Konan, N&#;guessan Gustave Aliko, Koffi Charles Boussou, Kotchi Yves Bony, Aka Jean-Paul Agnissan and Germain Gourène  

Stochastic modelling of Lake Malawi Engraulicypris sardella (Gunther, 1868) catch fluctuation

April 2018

Lake Malawi continues experiencing serious depletion of most valuable fish species. Presently, commercial and artisanal fishery are forced to target less valuable fish species. Evidently, economic importance of Engraulicypris sardella in Malawi cannot be negated as it currently contributes over 70% of the total annual landings. However, such highest contribution could be a sign of harvesting pressure. Therefore, as the...

Author(s): Rodgers Makwinja, Wales Singini , Emmanuel Kaunda, Fanuel Kapute and Mwamad M’balaka,  

Consumers’ preference and perception of smoke-dried white shrimp (Nematopalaemon hastatus) in coastal areas of Ondo State, Nigeria

March 2018

The study assessed consumers’ preference and perception of smoke-dried white shrimps in Igbokoda, a coastal area of Ondo State, Nigeria. The community was purposively chosen because the town is a major cluster for natives from coastal communities in Ilaje and Ese-Odo LGAs of Ondo State, Nigeria. Forty shrimp consumers (20 males and 20 females) were randomly selected for this study. They assessed the sensory...

Author(s): Bayode Paul Omobepade, Olabode Thomas Adebayo and Taiwo Timothy Amos  

Effect of gamma irradiation on the microbiological quality and shelf life of Engraulis encrasicolus in Ghana

March 2018

The effect of irradiation on microbial load and shelf-life of anchovies (Engraulis encrasicolus) was assessed in this study. Irradiation doses used in the study were 2.5, 5.0, 7.5 and 10 kGy. The assessment was carried out at 3 weeks intervals for the period of 9 weeks. Samples were analyzed for microbial load (total viable count, total coliform count and Staphylococcus aureus). Smoked samples were more contaminated as...

Author(s): Stella Agyemang Duah, Geoffrey Emi-Reynolds, Patrick Kumah and Daniel Agyarko Larbi  

Morphometric relationships of African big barb, Labeobarbus intermedius (Rüppell, 1836) in Lake Koka, Ethiopia

February 2018

Morphometric relationships of African big barb, Labeobarbus intermedius (Rüppell, 1836) (Pisces: Cyprinidae) in Lake Koka, Ethiopia was studied based on the total number of 266 adult fish samples collected in April-May and July-August 2011. Fish ranging from 23.3 to 49.0 cm in total length (35±4.1 cm) and from 95.4 to 1200 g in total weight (434.4±206.5 g) were randomly sampled. Of these, 55.6%...

Author(s): Agumassie Tesfahun , Elias Dadebo and Mathewos Temesgen

Effects of Lead Nitrate on catalase production levels in post juvenile Clarias gariepinus (Burchell, 1822)

January 2018

The effects of Lead Nitrate on catalase (CAT) production levels in post juvenile Clarias gariepinus were investigated. A total of 250 samples of the fish were acclimatized for two week. Six samples of the fish were exposed to the sub-lethal concentrations of 00, 28, 43 and 57 mg/L with replicate in each case for 28 days. Two samples of the fish were randomly selected from the treatments and control for the bioassay of...

Author(s): Okoye C. Loveline, Patrick Ozovehe Samuel, Arimoro, F. O., Ayanwale, A. V., Auta, Y. I. and Muhammed, A. Z.

Côte d’Ivoire aquaculture systems perception: Characteristics and influence on national fish production

December 2017

This study was undertaken in the main Côte d’Ivoire fish farming production regions. Fish farming were surveyed on the basis of socio-economic characteristics of fish farmers, farming practices and production depending to the systems. Results show that majority of fish farmers used semi intensive (51.8%) and extensive (42.9%) systems. Intensive system represented only 1.3% and rice-fish system 4.0% of fish...

Author(s): Hortense Anoumou Yao, Rachel Ahou Koumi, Célestin Boua Atsé, Paul Essetchi Kouamelan and Patrice Lucien Kouamé

Physical losses of fish along the value chain in Zambia: A case study of Barotse Floodplain

November 2017

The study was conducted in three districts of Western Province of Zambia namely; Mongu, Nalolo and Senanga that lie along the Zambezi River in the Barotse Floodplain. The study employed two main data tools aimed at understanding the extent of post-harvest losses in the fishing, processing and trading nodes in the fish value chain study sites. The tools were the Exploratory Fish Loss Assessment Method (EFLAM) study and a...

Author(s): Kefi A. S., Cole S. M., Kaminski A. M., Ward A. and Mkandawire N. L.

Assessment of monthly physico-chemical properties and fish yields of two micro dams of Tigray Region, Northern Ethiopia

October 2017

This study was conducted to assess some physico-chemical properties and yields of two micro dams (Korrir and Laelay Wukro) located in eastern zones of Tigray region (Northern Ethiopia). In each location, water samples and fish yield were examined from October 2013 to March 2014 once per month in each dams. The examined physico-chemical parameters were: Dissolved oxygen (DO), electrical conductivity (EC), total dissolved...

Author(s): Haftom Zebib and Tsegay Teame

Determination of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus from Ogun River, Nigeria

August 2017

Comparison of heavy metal levels in Oreochromis niloticus and Chrysichthys nigrodigitatus caught in Ogun River (Nigeria) was carried out to reveal the potential health risks associated with fish consumption from the river. Concentrations of copper, lead and cadmium were determined in the gills, eyes, bone, flesh, liver and stomach of the fish species. Ten fish of each species were obtained commercially and analyzed for...

Author(s): Fafioye O. O., Oladunjoye R. Y., Bamidele T. T. and Ige T. A.

Haematological profile of Heterobranchus bidorsalis fingerlings fed processed Delonix regia seeds at different inclusion levels of diets

July 2017

This study aimed at investigating the haematological profile of Heterobranchus bidorsalis fingerlings fed processed Delonix regia seeds at different inclusion levels of diets. Ten isonitrogenous diets (40% crude protein) were formulated with processed D. regia seed at 0% (Control), 10, 20 and 30% inclusion, respectively. The parameters analysed were pack cell volume (PCV), red blood cell (RBC), white blood cell (WBC),...

Author(s): Oyegbile B., Abdullahi B. A. and Yola I. A.

Effects of protease enzyme supplementation on protein digestibility of legume and/or fish meal-based fish feeds

July 2017

Improving protein digestibility in nutrient poor fish feeds through incorporation of dietary enzymes is expected to be achieved with protease. Understanding the role of other dietary enzymes was therefore evaluated to guide appropriate use for optimal fish growth. Protein digestibility of 30, 35, 50 and 55% crude protein (CP) diets was determined with catfish gut enzyme extract, sprouted sorghum, protease and phytase...

Author(s): Kemigabo, C., Kang’ombe, J., Masembe C., Jere, L. W. and Sikawa D.

A prognosis of the causes of vulnerability of Lake Malawi fish resources in Karonga town

June 2017

There is evidence that ammonia, hydrogen sulphide and dissolved oxygen are implicated in fish kills occurring on the Lake Malawi shores of Karonga town. Exposure to fish is influenced by strong winds while water temperature differences cause upwelling and fish mortalities in surface waters. The vulnerability of fish in Karonga town to physico-chemical factors was computed from secondary sources data obtained in 2000 to...

Author(s): Orton V. Msiska, G. D. Kanyere, S. Ngwira and Mtafu Manda

Morphological and genetic variability among Mpasa (Opsaridium microlepis Günther, 1864) populations from the inflow rivers of Lake Malawi

May 2017

Fisheries management continues to be a nightmare due to over exploitation of fish stocks and various anthropogenic activities resulting in a reduction of genetic resources. Opsaridium microlepis, a commercially exploited fish species from Lake Malawi, is no exception, hence it is listed among as endangered species. Opsaridium microlepis stocks from four different rivers, were analyzed using 13 geometric morphometric...

Author(s): Daud Kassam, Wisdom Changadeya, Hamad Stima, Wilson Jere and Emmanuel Kaunda

A review of the farming of common carp (Cyprinus carpio L.) in Malawi: Policy research directions for aquaculture development in Malawi

May 2017

The lack of better performing native fish species for aquaculture led the government of Malawi to import the exotic common carp (Cyprinus carpio L.) from Israel in 1976. Growth trials at Domasi and Kasinthula Experimental Stations had shown that common carp grew faster and to a larger size than the indigenous fish species. The government decided to distribute the fish to farmers for grow-out. Barely five years into...

Author(s): E. R. Chirwa, , D. Kassam, W. L. Jere and A. Mtethiwa

Dietary effect of varying linseed oil compositions on growth response, survival and polyunsaturated fatty acid levels in Tilapia (Oreochromis niloticus)

April 2017

The present study evaluated the impact of varying dietary linseed oil composition on growth, survival and tissue polyunsaturated fatty acids (PUFA) profiles in Nile tilapia (Oreochromis niloticus). Five iso-nitrogenious diets with varying linseed and sunflower oil concentrations were formulated and fish fed twice daily to for 3 months. Commercial diet was used as a control in triplicate tanks set for each diet...

Author(s): Omolo K. M., Onyango A., Magoma G., Munguti J.  and Ogila K.

Revisiting the ‘three-pillared design’ of a management system for the Elephant Marsh Wetland Fishery in Malawi

March 2017

This paper revisits and builds on the work of Ishmael Kosamu, Wouter de Groot and Patrick Kambewa who, in 2016, proposed a management system for the Elephant Marsh Wetland Fishery in Malawi, and identified key issues that would help the fishery to be sustainable in the short to medium term. They postulated that a sustainable three-pillared (locally based, weak, and amorphous) institution for the Elephant Marsh Wetland...

Author(s): Ishmael B. M. Kosamu,

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