International Journal of
Fisheries and Aquaculture

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

IJFA Articles

November 2018

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

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  

October 2018

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

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  

September 2018

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

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  

September 2018

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

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.  

August 2018

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

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  

July 2018

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

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  

June 2018

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

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

June 2018

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

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  

May 2018

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

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  

April 2018

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

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,  

April 2018

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

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  

March 2018

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

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  

March 2018

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

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  

February 2018

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

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

January 2018

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

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.

December 2017

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

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

November 2017

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

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.

October 2017

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

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

August 2017

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

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.

July 2017

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

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.

July 2017

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

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.

June 2017

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

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

May 2017

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

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

May 2017

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

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

April 2017

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

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.

March 2017

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

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,

February 2017

Growth performance of Oreochromis variabilis larvae: A case study of effect of live and formulated diets on growth and survival rates

Oreochromis variabilis Boulenger (1906) is an indigenous and critically endangered fish species of Lake Victoria. It is among the species targeted for stock enhancement and restoration in Kenya. Such mass stock enhancement requires simple and easily applicable techniques to maximize its larviculture. This study investigated the growth potential of O. variabilis from fry to fingerling stages using diets formulated from...

Author(s): Maithya, J., N. M. Mbithi and P. Wanjala

January 2017

Evaluation of zootechnical and reproductive parameters of wild populations of Sarotherodon melanotheron Rüppell, 1852 of Southern Benin raised in captivity

Tilapia Sarotherodon melanotheron is naturally adapted to both fresh and brackish environments. In order to improve its farming potential, this study evaluated the growth, survival and reproductive parameters of individuals from three lakes of southern Benin according to their sex and age at experimental fishing. During fry rearing and breeding, fish were fed with commercial feed granulated. The chlorophyll a...

Author(s): T. Olivier Amoussou,, Aboubacar Toguyeni, I. Imorou Toko, Antoine Chikou, Mivice Bravo and Issaka Y. Abdou Karim

December 2016

Preliminary report on “two spot” razor fish, Iniistius bimaculatus (Ruppell, 1829) found in the Chennai coastal waters, southeast coast of India

The present study reports the first occurrence of two spot razor fish, Iniistius bimaculatus (Ruppell, 1829) from the Chennai coastal waters, Southeast coast of India. Two specimens measuring 141 mm and 169 mm TL was collected from trawl catches in the Chennai coast during September 2010. A systematic account of this species and a description, colour and notes on its distribution is provided. The controversy of two...

Author(s): K. Silambarasan, K. Sujatha, A. Sundaramanickam and E. Rajalakshmi

December 2016

Investigating changes in fish biodiversity in coastal villages of Zanzibar Island, Tanzania

This study was conducted at the coastal villages of Zanzibar Island to investigate changes in fish biodiversity. The methodology mostly involved face-to-face interviews and structured questionnaires. Findings of this research paper revealed that there are twenty seven families of fish species of economically importance in the study area of which Scombridae is the most dominate species. This research study shows that...

Author(s): John Sebit Benansio and Narriman Jiddawi

December 2016

Movement patterns of Chilean flounder (Paralichthys adspersus) inside Tongoy Bay (central northern Chile): Observations using passive acoustic telemetry

The movement patterns of juvenile and adult Chilean flounder (P. adpersus) were investigated inside Tongoy Bay using ultrasound signal acoustic receivers from June 2012 to March, 2013. Flounder landings in Tongoy Bay and Puerto Aldea from December 2011 to March 2013 were examined. Multiple regression analysis indicated that the Catch per Unit of Effort of Chilean flounder was significantly and negatively related to...

Author(s): Pablo M. Rojas

November 2016

Analysis of growth performance and haematological parameters of Oreochromis niloticus fed on a varying diet of Moringa oleifera Lam. leaf meal as an additive protein source

The objective of the current study was to investigate the growth performance and haematological parameters of Oreochromis niloticus fed on four different diets at different Moringa oleifera leaf meal inclusion levels over a period of 33 weeks. The results indicate that Moringa leaf meal causes depressed growth in fish but may increase the immunity of the fish to fight infections and diseases. The four inclusion levels...

Author(s): Ian Bbole, Chanda Mumba, Nephter Mupenda and Alexander Shula Kefi

October 2016

Moisture sorption isotherm of Tuna Se’i, smoked with liquid smoke

One of the meat products in East Nusa Tenggara is called “se’i”, commonly made from beef, pork, deer meat, and recently have been developed using fish meat. Moisture Sorption Isotherm (MSI) is an important characteristic of food which is almost affected to aspect of the dehydration process and storage stability of the dried product. The aims of this study are to produce tuna se’i using liquid...

Author(s): Ayub U. I. Meko, Siegfried Berhimpon, I Ketut Suwetja and Frans G. Ijong

September 2016

Site suitability assessment of selected bays along the Albert Nile for Cage Aquaculture in West Nile region of Uganda

Selection and management of sites are among the most significant elements for the success and sustainability of aquaculture operations. Water quality, water depth and water current are three of the major factors that need to be considered before initiating cage culture in a natural water body. This study was conducted to identify suitable sites for cage farming along the Albert Nile of Uganda by assessing the physical,...

Author(s): Nasser Kasozi, Hellen Opie, Gerald Iwe, Christopher Enima, Mujibu Nkambo, Martin Turyashemererwa, Janet Naluwayiro and Kassim Sadik

September 2016

First occurrence of the Red Sea goatfish, Parupeneus forsskali (Fourmanoir & Guézé, 1976) in the coastal waters of Egyptian Mediterranean Sea

This study discusses the first recorded occurrence of the Red Sea goatfish, Parupeneus forsskali in the Egyptian Mediterranean waters, to the best of the authors’ understanding. On 31 January 2016, a single specimen of this species was captured from Alexandria coastal waters (31°16'N; 30°10'E), Mediterranean Sea, Egypt. The collected specimen represents the first record of P. forsskali in the...

Author(s): Sahar F. Mehanna, Usama M. Mahmoud and Eman M. Hassanien

August 2016

Effects of different additives on colorimetry and melanosis prevention of Atlantic seabob shrimp (Xyphopenaeus kroyeri) stored under refrigeration

The aim of this work was to evaluate the effect of the food additives, sodium chloride, sodium metabisulfite, sodium nitrite and citric acid on the anti-melanotic activity in shrimp (Xyphopenaeus kroyeri) kept under refrigeration for 13 days post-capture. A sensory panel and color measurements (L*: luminosity, a*: red-green axis saturation and b*: yellow-blue axis saturation) was conducted during storage to evaluate the...

Author(s): Ana Amélia Nunes Fossati, Guiomar Pedro Bergmann, Luiz Alberto Oliveira Ribeiro, Danilo Pedro Streit Júnior, Tiago Martins Costa Schneider and Liris Kindlein

August 2016

Growth performance of three tilapia fish species raised at varied pond sizes and water depths

An on-farm study was conducted in Chingale area in Zomba, Southern Malawi to assess the growth of three tilapia fish species in earthen ponds of different sizes and water depths. The experiment was laid out in a factorial design of 200 and 400 m2 pond sizes, 0.8 and 1.2 m pond water depths, and fish species: Oreochromis karongae, Oreochromis shiranus and Tilapia rendalli, replicated thrice among randomly selected...

Author(s): Fanuel Kapute, Joshua Valeta, Jeremy Likongwe, Jeremiah Kang’ombe, Joseph Nagoli and David Mbamba

July 2016

Ovulation induced in African catfish (Clarias gariepinus, Burchell 1822) by hormones produced in the primary culture of pituitary cells

This study examined the potential of catfish pituitary cells to proliferate in culture media and that of hormones produced in their primary culture to induce spawning in African catfish. The trypsinized pituitary cells were cultured in three culture media RPMI 1640, McCoy 5a and M2 media with addition of 10% fetal bovine serum. Female catfish (800±200 g) were induced using the culture medium that gave the...

Author(s): O. O. Oyeleye, S. I. Ola and O. G. Omitogun

June 2016

Occurrence of a Pterygoplichthys disjunctivus (Weber, 1991) population in Cauvery River System, Tamil Nadu, South India

This study reports the first occurrence of exotic loricariid catfish Pterygoplichthys disjunctivus, introduced for aquarium, in tributaries and fed pond of Cauvery River, Thiruvengadu, Tamil Nadu (South India). The morphological features of P. disjunctivus samples are given and compared with closely related species of the same genus. The observed invasive species is highly aggressive in nature and it was reported to...

Author(s): Moorthy Meena, Arumugam Sundaramanickam and Thipramalai Thankappan Ajith Kumar

May 2016

Investigation on Food Ecology of three Cichlid Species in the Mankessim Reservoir, Central Region of Ghana

The Mankessim Reservoir supports a thriving cichlid fishery that provides both financial gain and nutritional value to the people. Fish samples of Hemichromis fasciatus, Tilapia zillii and Sarotherodon melanotheron were obtained from artisanal fishermen by gill nets (10 m long and 1.5 m deep, 3, 6 and 12 mm mesh) and cast nets (25 mm mesh and 2.5 m radius) in the reservoir (5018''52.08'''N...

Author(s): Sandra Akugpoka Atindana, John Blay and Kobina Yankson

April 2016

Reproductive biology of Blackchin tilapia, Sarotherodon melanotheron (Pisces: Cichlidae) from Brimsu Reservoir, Cape Coast, Ghana

This study described some aspects of the reproductive biology of Blackchin tilapia (Sarotherodon melanotheron, Cichlidae) from Brimsu reservoir. A total of 457 specimens were sampled using a monofilament gill net of mesh size 25 mm from September, 2009 to September, 2010. Standard length for the species ranged between 7.5 and 17.6 cm, with both males and females having a unimodal modal length of 10.0 to 10.9 cm. The...

Author(s): Mireku, K. K., Blay, J. and Yankson, K.

March 2016

Bioassay using juvenile mysids for rapid assessment of seawater: A case study from Reef HQ Aquarium (Townsville, Australia)

Reef HQ Aquarium (Townsville, Australia) pumps its new exhibit seawater from a tidal inlet. This study presents the in-house calibration of a bioassay based on juvenile mysids to do a rapid assessment (presence or absence) of toxicity in the new seawater. Calibration tests were carried out for several substances: copper, sodium lauryl sulphate (SLS or SDS), ammonia, antifouling paint, bilge oil from a yacht, oil from a...

Author(s): THOMAS Severine, THYER Sascha, COOPER Ross, Emily Hope and Richard Laming

February 2016

Report of fish mass mortality from Lake Hashenge, Tigray, Northern Ethiopia and investigation of the possible causes of this event

This study was intended to report the disastrous mass mortality of Nile tilapia (Oreochromis niloticus) and common carp (Cyprinus carpio) in Lake Hashenge, Tigray occurred in June, 12 to 15th, 2014 and to investigate the possible causes of this phenomenon. The dissolved oxygen (DO) of the water of the lake was 2.20 mg/L in the north part and 2.09 mg/L in the south west part of the lake with an average of 2.15 mg/L. The...

Author(s): T. Teame, P. Natarajan, H. Zebib and G. Abay

February 2016

The joint action effects of the binary mixtures of some botanical piscicides on post juvenile Clarias gariepinus

Botanical piscicides over the years have been used singly in fishing efforts. This research investigated the joint action of binary mixtures of Carica papaya + Nicotiana tabacum, Anacardium occidentale + Senna occidentalis, and A. occidentale + Luffa cylindrica. Relative toxic units (RTU) estimations and synergistic ratio (SR) models were used in the joint action evaluation. The 96 h LC50 (95% confidence limit [CL])...

Author(s): Ekpendu E. A., Saliu J. K. and Otitoloju A. A.

January 2016

Fish assemblage structure in the Tropical Coastal Lagoon of Grand Lahou (Côte D’Ivoire, West Africa)

Fish assemblages and their relationship with hydrological variables were investigated in the coastal lagoon of Grand-Lahou (Côte-d’Ivoire) from November 2013 to October 2014. Samplings were carried out by means of artisanal fisheries, once a month, in three sites. A total of 8571 fish belonging to 47 fish species from 25 families were recorded. The most represented families were Cichlidae and Mugilidae with...

Author(s): COULIBALY Bakari, , TAH Léonard, JOANNY-TAPE Gnahoré Toussaint, KONE Tidiani, and Paul-Essetchi KOUAMELAN

December 2015

Effect of dietary protein levels on ammonia concentration and growth of Tilapia rendalli (Boulenger, 1896), raised in concrete tanks

Tilapia rendalli juveniles (±9.5 g) were cultured in concrete tanks to determine the effect of four dietary protein levels (30, 35, 40 and 45% crude protein (CP) in feed on ammonia concentration and growth performance of the fish, stocked at 15 fish per tank. Fish were monitored for a period of 90 days. Fish that were fed on 40% CP diet had significantly (P<0.05) higher weight gain, growth, and feed conversion...

Author(s): Rodgers Makwinja, Fanuel Kapute, Wales Singini and Hastings Zidana

December 2015

Application of geographic information system for inland fisheries management: A case study of Stratum VII (Yeji Sector), Volta Lake, Ghana

A geographic information system (GIS)-modeling of fish production in the Stratum VII of the Volta Lake was undertaken with the objective of investigating temporal changes and modeling fish production into the future. Parameters used included number of canoes, number of fishers, and water level. Stratum VII of the Volta Lake is currently one of the areas with the highest fishing activities, the largest fish market at...

Author(s): Dogbeda Mawulolo Yao Azumah , George Wiafe and Patrick Kwabena Ofori-Danson

October 2015

A comparative study of the profitability of brush parks in two states in Nigeria

Brush parks consist of branches of trees or shrubs stuck into muddy bottoms of lagoons, lakes or rivers at a depth of 1 to 1.5 m. The branches are placed in water to form aggregations, which are removed after a short lapse of time, together with any fish that may have sought shelter amongst them. Brush parks are found in several of the West African coastal lagoons such as Lagos and freshwater environments in Niger...

Author(s): Ahmed Gomna

September 2015

Mass production of rotifer (Branchionus calyciflorus) for aquaculture in south-eastern Nigeria

In this research, mass production of freshwater rotifer, Branchionus calyciflorus, for aquaculture in south-eastern Nigeria, using different food types (Chlorella sp., Spirulina sp and Baker’s yeast) was investigated. Rotifer stock culture was prepared using Nitrogen phosphorus Potassium, (NPK) + urea (50 : 2.5 g) and chicken droppings (25 g) with freshly grown alga. Different food concentrations (150, 300, 650...

Author(s): G. E. Odo, J. E. Agwu, F. O. Iyaji, J. C. Madu, N. I. Ossai and L. N. Allison

August 2015

A study of optimal utilization of wood resource through alternative use of wood waste in fish smoking

This study was conducted to determine and compare the suitability and efficiency of wood wastes (sawdust and wood shavings) as alternative energy sources to fuel wood in fish smoking with a view to enhancing optimal utilization of the wood resource. Fish samples collected were smoked with fuel wood, sawdust and wood shavings using Kainji portable smoking kiln. Proximate compositions of the samples were determined and...

Author(s): A. Ibrahim, S. O. Olayimika, J. O. Oyero, T. A. Yisa, S. U. Ibrahim and U. P. Yakubu

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