• 2017 Jul

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

Abstract

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... Read more.

• 2017 Jul

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

Abstract

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),... Read more.

• 2017 Jun

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

Abstract

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... Read more.

• 2017 May

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

Abstract

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... Read more.

• 2017 May

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

Abstract

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... Read more.

• 2017 Apr

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

Abstract

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... Read more.

• 2017 Mar

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

Abstract

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... Read more.

• 2017 Feb

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

Abstract

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... Read more.

• 2017 Jan

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

Abstract

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... Read more.

• 2016 Dec

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

Abstract

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... Read more.

• 2016 Dec

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

Abstract

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... Read more.

• 2016 Dec

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

Abstract

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... Read more.

• 2016 Nov

• 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

Abstract

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... Read more.

• 2016 Oct

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

Abstract

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... Read more.

• 2016 Sep

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

Abstract

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,... Read more.

• 2016 Sep

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

Abstract

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... Read more.

• 2016 Aug

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

Abstract

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... Read more.

• 2016 Aug

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

Abstract

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... Read more.

• 2016 Jul

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

Abstract

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... Read more.

• 2016 Jun

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

Abstract

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... Read more.