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: 212

IJFA Articles

November 2013

Effect of short-term cyclic feed deprivation on growth and economic limit of commercial feed-based in-door grow-out of Clarias gariepinus (Burchell, 1822)

Growth, feed utilization, and economic limit of commercial pelleted feed use were compared between daily-fed and feed deprived groups of Clarias gariepinus (Burchell, 1822) raised under low density culture. Groups of C. gariepinus were fed daily (Treatment 1) or on alternate days (Treatment 2) for 5½ months, with 45% crude protein commercial pellets. Feeding was at a rate of 6% body weight per day which was...

Author(s): Ofor, Chukwuma Okereke and Ukpabi, Chikwendu

October 2013

Ichthyofauna diversity of Lake Asejire: Ecological implications

The natural diversity of most aquatic systems has witnessed various changes in stock diversity and abundance resulting from structural changes in habitat, food composition and uncontrolled exploitation. These have altered the ecology of the fish resources with the disappearance of some species and dominance of others. This study seeks to identify the ecological implication of the stock diversity and abundance in Lake...

Author(s): Ipinmoroti, Mabel Omowumi

October 2013

Population dynamics of the edible clam Meretrix casta (Chemnitz) (International Union for Conservation of Nature status: Vulnerable) from two estuaries of North Kerala, south west coast of India

The population parameters of the edible clam Meretrix casta (Chemnitz) from two estuaries along the coast of north Kerala, Southern India were estimated. M. castahas been cited as vulnerable as per al. (2006a). Growth of M. casta from the east coast has been reported by Abraham (1963), Durve (1970: 73) and Sreenivasan (1983).  Jayawickrema and Wijeyratne (2009) have described the population...

Author(s): P. Laxmilatha

October 2013

Mixed culture (shrimps, oysters and macroalgae) to improve the productivity, and reduce the environmental impact to coastal ecosystem caused by shrimp hatcheries in Mexico

In Mexico, shrimp hatcheries have been developed as intensive monocultures, resulting in hatcheries management troubles, economic losses and environmental impact. Therefore, the aim of this work was compare to a traditional culture vs. a mixed culture. Shrimp juveniles were distributed in aquariums and ponds at the same density (51 shrimps/m2) but ponds, also had oysters and macroalgae. Shrimps in aquaria and ponds were...

Author(s): Guillermo Galindo Reyes

September 2013

Enzyme activity in the Nile perch gut: Implications to Nile perch culture

Nile perch (Lates niloticus) is a high-value freshwater fish of great social economic importance in Africa’s great lakes region. High demand for this fish has caused its extensive harvest, resulting into a decline in the species stocks and consequently financial loss to the Nile perch industry. Several strategies have been suggested to reinstate the fish population, including the domestication of Nile perch,...

Author(s): Namulawa V. T., Kato C. D., Rutaisire J., Britz P. J.,  Beukes N., Pletschke BI and Whiteley C.

September 2013

Partial replacement of fish meal by earthworm meal (Libyodrilus violaceus) in diets for African catfish, Clarias gariepinus

A seven-week feeding trial was conducted to examine the possibility of replacing fish meal with earthworm meal in the diets of the African catfish, Clarias gariepinus fry. Fish meal protein was replaced by earthworm meal at 0% (D0); 15% (D15); 25% (D25); 35% (D35); and 50% (D50). The diets were isonitrogenous (54%) and fed thrice daily to triplicate groups of African catfish fry at 5% body weight. Diet...

Author(s): Dedeke G. A., Owa S. O., Olurin K. B., Akinfe A. O. and Awotedu O. O.

September 2013

Utilization of blood meal as a protein ingredient from animal waste product in the diet of Oreochromis niloticus

Three iso-nitrogenous diet of 35% crude protein were prepared with blood meal at various inclusion level of 0, 50 and 100%. These were coded Treatment 1 (T1), Treatment 2 (T2), and Treatment 3 (T3) respectively. The diet with 0% blood meal was used as control. Oreochromis niloticus average initial weight of 6.20±0.02 g were randomly allocated to three treatment diets, 20 fingerlings per unit...

Author(s):   Aladetohun N. F. and Sogbesan O. A.

September 2013

Accumulation of some potentially toxic metals and polycyclic aromatic hydrocarbons (PAHs) in marine clam Liochoncha ornata collected from the Omani Sea

Clam samples of Liochoncha ornata were collected for a period of one year from July 2009 to June 2010 at monthly interval. The soft tissue of clams was analyzed to detect some potentially toxic metals and polycyclic aromatic hydrocarbons (PAHs). Accumulation of Hg, Cd and Pb in the clam tissues showed variability with a mean concentration of 0.011±0.009, 1.769±0.942 and 0.015±0.039...

Author(s): M. Al-Busaidi, P. Yesudhason, A. Al-Waili, W. Al-Rahbi, K. Al-Harthy, N. Al-Mazrooei and S. Al-Habsi

September 2013

Population structure and fishing of the greasyback shrimp (Metapenaeus ensis, De Haan, 1844) by bag net in a coastal river of the Mekong Delta, Vietnam

The greasyback shrimp (Metapenaeus ensis) was studied in My Thanh River in Soc Trang Province, in the coastal region of the Mekong Delta in 2010. The bag net was used in the study; it had conducted six rounds of sampling (February, April, June, August, October, and December) at six stations along 30 km of river from the estuary at 6 km intervals. Besides, survey data also involved 36 fishermen, who are...

Author(s): Tran Van Viet, and Kazumi Sakuramoto

August 2013

Monthly spatial occurrence of phytoplankton and zooplankton in River Ogun, Abeokuta, Ogun State, Southwest Nigeria

The aim of this study was to investigate the monthly spatial occurrence of phytoplankton and zooplankton in River Ogun, Abeokuta, Southwest Nigeria. This was carried out for seven months between December, 2011 and June, 2012 in 4 stations. A total of 41 species of phytoplankton and 16 zooplankton species from 5 classes respectively were recorded. Zooplankton was dominated by Cladocera throughout the study period while...

Author(s): Dimowo, Benjamin Onozeyi

August 2013

Effect of different stocking densities on growth performance and profitability of Oreochromis niloticus fry reared in hapa-in-pond system

A one month trial of sex reversal treatment of O. niloticus fry of varying stocking densities was performed in hapas-in-pond to determine the growth performance characteristics and profitability. Larvae were selected, collected, weighed  and stocked inside a 10.0 m2 hapas in a 0.2 ha pond with stocking densities of 10000 (A), 15000 (B) and 20000 (C). Each stocking were made in triplicate. Fry were...

Author(s): Emmanuel Tetteh-Doku Mensah, Felix Klenam Attipoe and Mercy Ashun-Johnson

August 2013

A new species of Tylocephalum (Cestode: Lecanicephalide, Braun, 1900) from marine fish at Ratnagiri, India

The present investigation deals with systematic observation of the cestode parasitesTylocephalum Linton, 1890, that is, T. damodarae n.sp. of marine fish Dasyatis walga Muller and Henle, 1841 from West Coast of Maharashtra which is most pathogenic. The present worm comes closer to all the known species of the genus Tylocephalum in general topography of organ but differs due to...

Author(s): D. M. Pathan and D. B. Bhure

August 2013

Gill arch occupation models of parasite communities of Barbus martorelli (Teleostean: Cyprinidae)

Changes in Barbus martorelli gill arch occupation models by its parasite component community were investigated for nine months. The work revealed three different categories of models. The first category follows the combined action of the respiratory water current and the colonized surface of each gill arch. The second category based on the mode of infestation of Monopisthocotylean larvae while the third...

Author(s): TOMBI Jeannette and BILONG BILONG Charles Félix

July 2013

Nutritive value of cultured white leg shrimp Litopenaeus vannamei

Biochemical assays play a major role in recent years. The biochemical composition is the yardstick to measure and assess the nutritional quality of food sources. In the present study, protein, carbohydrate, lipid, moisture and ash in Litopenaeus vannamei was 35.69, 3.20, 19, 76.2 and 1.2% respectively. Calcium content was maximum (154.5 mg) followed by sodium (67.7 mg) and potassium (56.7 mg). Manganese was...

Author(s): Gunalan B, Nina Tabitha S., Soundarapandian P. and T. Anand

July 2013

Inclusion effect of graded levels of molases in the diet of Clarias gariepinus juvenile

The effect of molasses as dietary energy replacement for indomie waste in the diet of African catfish  was tested on 120 juveniles for 56 days. The fish were evenly distributed over twelve experimental  tanks (52.5  33.5  21 cm); feeding was done by hand to satiation and the water changed every other  day to maintain good water quality. Four experimental diets were formulated; the control,...

Author(s): Aderolu, Ademola Zaid, Aarode, Oluwaseun Olasunkanmi and Bello, Rafiat Ajoke

July 2013

Effects of rotifer, Brachionus rotundiformis in enhancing some digestive enzyme activities into glucose on somatic growth, RNA/DNA contents and some digestive enzyme activities of olive flounder Paralichthys olivaceus larvae

We investigated the effects of enzyme enhanced rotifer (EER), Brachionus rotundiformis on growth, RNA/DNA contents and digestive enzyme activities in olive flounder Paralichthys olivaceus larvae. Digestive enzyme activities of rotifer were enhanced by putting glucose in culture medium, and then rotifers (NR, rotifer not supplied the glucose during culture, and EER) was supplied to 10 rotifers/ml in...

Author(s): O-Nam Kwon, Kie-Young Park, and Heum-Gi Park,

July 2013

Effect of clove (Eugenia aromatica) powder anaesthetic on some haematological parameters in hybrid catfish (Heterobranchus bidorsalis ♀ x Clarias gariepinus ♂) juveniles

This study was designed to investigate the efficacy of clove powder as anaesthetic and its effect on some haematological parameters of hybrid (Heterobranchus bidorsalis ♀ x Clarias gariepinus ♂) juveniles. Different concentrations of 80, 90, 100, 110, 120, and 130 mg/L were exposed to 108 healthy fish of mean weight 20.38 ± 3.30 g and total length 14.33 ± 2.50 cm for 30 min at the Fisheries...

Author(s): Okey B., Keremah R. I. and Ofem B. O.

June 2013

Polyculture of seabass with tilapia for the utilization of brown fields in the coastal areas of Cox’s Bazar, Bangladesh

Disease outbreak in shrimp culture sector has abandoned the vast coastal areas of Bangladesh. These abandoned areas treated as ‘brown fields’ could be utilized for finfish culture using low cost inputs. This type of culture practice has the potential to be successful in the coastal waters due to having seasonally fluctuating salinity of 0 to 15 ppt. The present study was conducted to determine the growth and...

Author(s): Md. Mostafa Monwar, A. K. M.  Ruhul Amin Sarker  and Nani Gopal Das

June 2013

Economic analysis of polder based freshwater prawn farming systems in Kuttanad, India

Techno-economic analysis of different farming systems prevalent for Macrobrachium rosenbergii in Kuttanad, a wetland ecosystem of India was carried out. Results showed considerable variation in production cost and profitability among the farming systems. Cobb-Douglass production function model suggested that optimization of input cost along with adoption of appropriate management strategies as prerequisites...

Author(s): K. Ranjeet and B. Madhusoodana Kurup

June 2013

Ichthyofauna characteristics of a tropical low brackish open Lagoon in South-western Nigeria

The fish fauna of Lekki lagoon in south-western part of Nigeria was studied from March 2006 to February 2008. Sampling was carried out once a month using different fishing gears and the market was visited to confirm the fish species diversity from the lagoon. A total of 16,960 specimens made up of juveniles and adults caught were identified and classified. They comprised of eighty-one species belonging to 40 families,...

Author(s):   Emmanuel, B. E. and Osibona, A. O.

June 2013

Comparison of experimentally elaborated food from regionally available products with commercial foods of common carp (Cyprinus carpio) in the Mexican highlands

Aquaculture increasingly contributes to human nutrition, but the expansion of semi-intensive systems is limited by the high cost of commercial food. This is the case of the semi-intensive production of carp (Cyprinus carpio) in artificial lakes and reservoirs in the state of Tlaxcala in the Mexican highlands.  24% cheaper alternative food from duckweed (Lemna sp.) (37%), soya (Glycine max) (36%), corn (Zea...

Author(s): Rosario Rivera Meneses, Juan Suárez Sánchez, Luz del Carmen Pérez González, Johannes C. Van der Wal, Hipólito Muñoz Nava and Salvador Morales Moreno

June 2013

Food habits of two species of Pseudotolithus (Sciaenidae) off Benin (West Africa) nearshore waters and implications for management

Food habits of Pseudotolithus senegalensis and Pseudotolithus typus in Benin nearshore waters were investigated for 18 months because of the importance of croakers in artisanal catches. Frequency of occurrence, numerical abundance and gravimetric composition were utilized in computing the percent index of relative importance of each food item. The major dietary components of the two species were...

Author(s): F. K. E. NUNOO, E. SOSSOUKPE, A. ADITE and E. D. FIOGBE

June 2013

Length-weight relationships and condition factors of Alestes baremoze, Brycinus nurse and Schilbe intermedius from the lower reaches of white volta river (Yapei), Ghana

A study to assess the length-weight relationships and the condition factors of 3 abundant and commercial fish species namely Alestes baremoze,  Brycinus nurse and Schilbe intermediusin the lower reaches of the White Volta River (Yapei) was conducted from October 2011 to March 2012. Using W = aLb, the length-weight relationships of the species were calculated. Condition factors of the species...

Author(s): Seth Mensah Abobi and  Werner Ekau

May 2013

First ever record of a threatened onespot barb fish, Puntius terio (Hamilton) from Arunachal Pradesh, India: A biodiversity hot spot

Arunachal Pradesh is geographically the largest state in North-East region of India with rich lentic and lotic water resources. The state has more than 7000 ha of lentic water and 2000 km of lotic water resources. Arunachal Pradesh is the 18th hot spot of the world in view of the richness of biological diversity. It constitutes high endemism and comparatively higher incidence of rare and threatened taxa. Available...

Author(s): Keshav Kr. Jha, Onong Tamuk, Tapan Kr. Ghosh and Vibhash Ch. Jha

May 2013

Influence of dietary protein levels on growth, feed utilization and carcass composition of snakehead, Parachanna obscura (Günther, 1861) fingerlings

Five isoenergetic semi-purified diets were formulated to evaluate the effects of dietary crude protein levels on growth and feed utilization of snakehead, Parachanna obscura (4.08 ± 0.07 g). Experimental diets were formulated to contain graded levels of crude protein (CP; 30, 40, 45, 50 and 60 g/100 g of diet). Fish feed on the tested diet in triplicate for 45 days. Seventy fingerlings were stocked per...

Author(s): Diane N. S. Kpogue, Grace A. Ayanou, Ibrahim I. Toko, Guy A. Mensah and Emile D. Fiogbe

May 2013

An assessment on red tilapia stocks in Malaysia using microsatellite markers

Tilapia is an important farmed freshwater fish in Malaysia. Freshwater aquaculture production statistics showed that tilapia topped the list for several years. On the choice of colour, the Malaysian aquaculture industry has always preferred the red hybrids. Statistically, red tilapia represented 86% of the total local tilapia production. One of the constraints faced by the industry is seed stock quality. There...

Author(s): K. V. Karuppannan, I. Noraida and S. Oyyan

May 2013

Essentiality of calcium supplement in the diets of Heterobranchus bidorsalis fingerlings

An 84-day feeding trial was conducted to determine the effect of calcium (Ca) supplemented diets on growth and body mineral composition of Heterobranchus bidorsalis, initial mean weight (5.05 ± 0.31 g). Glass aquaria (70 × 45 × 40 cm) each filled up to 70 L of its volume with Ca -free water were used for the experiment. Eleven practical diets were formulated to contain graded levels of...

Author(s): I. A. Adebayo and B. O. Omitoyin

May 2013

Evaluation of the nutritional quality of four unexplored wild food plants from Arunachal Himalayas for the formulation of cost effective fish feeds

Wild food plants used by the tribes of Arunachal Himalaya (Northeast India) found to be highly nutritious to maintain general balance diet. A study was conducted to evaluate the nutritional potential of four commonly found, unexplored wild food plants namely, Angiopteris evecta,Amaranthus viridis, Celosia argentea and Monochoria vaginalis used by the tribes of Arunachal Himalaya to ascertain...

Author(s): Kalita Pallabi, Hui Tag and A. K. Das

April 2013

Recent changes in fish communities of the equatorial Lake Naivasha, Kenya

Changes in fish species composition and abundance in Lake Naivasha were investigated monthly for a period of 12 months. Data were obtained both from experimental surveys as well as commercial fish landings. The structure metrics considered included species abundance and composition, length- frequency and physico-chemical attributes. Results of the study showed that the fishery is currently dominated by the recently...

Author(s):   Aloo P. A., Oyugi D. O., Morara G. N. and Owuor M. A.

April 2013

The effects of replacement of fish-meal with crab-meal on growth and feed utilization of African giant catfish Heterobranchus longifilis fingerlings

A feeding experiment was conducted in plastic aquaria (46 ´ 38 ´ 28 cm3) to investigate the effect of replacing fish-meal (FM) with crab-meal (CM) on growth, feed utilization and body composition of Heterobranchus longifilis fingerlings with body weight, 3.11 ± 0.56 - 8.48 ± 1.70 g and total length, 73.07 ± 4.99 - 98.69 ± 7.64 mm. Fish and crab-meal were separately used to produce...

Author(s): Reginald Inodu Keremah

April 2013

Temperature-dependent egg development rates, hatchability and fry survival rate of Lake Malawi Tilapia (Chambo), Oreochromis karongae (Pisces: Cichlidae)

A study was conducted to assess the effect of temperature on egg development in an attempt to improve hatching success and fry production in Oreochromis karongae. Temperature-dependent development rates and hatching period for fertilized eggs stripped from O. karongae, a mouth brooder, were determined in a recirculating system set up in a hatchery at the National Aquaculture Center, Domasi, Malawi. Three...

Author(s): Valeta J. S., Likongwe J. S., Kassam D. and Maluwa A. O.

March 2013

Effects of smoke-drying temperatures and time on physical and nutritional quality parameters of Tilapia (Oreochromis niloticus)

Effects of smoke-drying temperatures and duration of drying on the quality of Nile tilapia (Oreochromis niloticus) samples were investigated by smoke–drying Tilapia fish under three different temperatures (50, 60 and 70°C) and three drying times (5, 10 and 15 h) using modified drum kiln dryer. The proximate compositions of the fresh and dried fish were evaluated and the sensory evaluation of the organoleptic...

Author(s): Idah, Peter Aba and Nwankwo, Ifannyi

March 2013

Comparative growth performance of male and female freshwater prawn Macrobrachium tenellum (Decapoda: Palaemonidae) cultured in tropical earthen ponds

The purpose of the present study was to determine the performance growth and yield of male and female Macrobrachium tenellum, cultured in earthen ponds. A total of 6 earthen ponds containing 1,400 ± 50.0 m2 of water and a depth of 0.85 m were used. A total of 19,600 juvenileM. tenellum were introduced into each pond to a stocking density of 14 org m-2. The final length, final weight, specific...

Author(s): Jesús T. Ponce-Palafox, Fermín López Uriostegui, Mario Alfredo Benítez Maldujano, Sergio Castillo Vargasmachuca, Aurelio Benítez Valles, Julio Gómez Gurrola and José Luis Arredondo-Figueroa

March 2013

Evaluation of soybean meal as protein source for Argyrosomus Regius (Asso, 1801) (Sciaenidae)

The meagre (Argyrosomus regius) is a carnivorous fish which requires diets with higher protein content, causing an increment in diets cost. A way to diminish this cost is to use vegetable meals like soybean meal (SB). So the aim of this trial was to determine the optimum inclusion level of defatted soybean meal in experimental diets for this species. 800 fishes (165 g) were distributed in 8 tanks, two replicates per...

Author(s): Jorge Velazco-Vargas, Silvia Martínez-Llorens, Miguel Jover Cerda and Ana Tomás-Vidal

February 2013

Production and marketing systems of farmed tilapia in China

Tilapia has become one of the major species of aquatic products in close link with both domestic and international markets. Nowadays, the demand for fish and fisheries product has being exacerbated by the continued increase in human population the world over. This was due to the fact that global captured fishery was declining following the increased human exploitation for the commercially important...

Author(s):   Matlala Moloko P., Kpundeh Mathew D., and Yuan Yongming,

February 2013

Utilization of the earthworm, Eudrilus eugeniae in the diet of Heteroclarias fingerlings

The earthworm, Eudrilus eugeniae was cultured for 12 weeks and its meal utilized as a replacement for fish meal in the diet of fingerlings of the mud catfish hybrid (♂Heterobranchus longifilis X ♀Clarias gariepinus) called Heteroclarias. Two hundred and seventy adult E.eugeniae were cultured in three substrates: Soil, cellulose, or a mixture of cellulose and soil. The worms were...

Author(s): C. O. Monebi and A. A. A. Ugwumba    

January 2013

Toxic effect of potassium permanganate on Oreochromis niloticus based on hematological parameters and biomarkers of oxidative stress

Potassium permanganate (KMnO4) is an oxidizing agent used in aquaculture for many years. Despite its known efficacy for the treatment and prevention of fish diseases, information about their potential toxicity in non-target organisms is still very limited. The objective of this study was to evaluate the sublethal effects of potassium permanganate (1.0 and 4.0 mg L-1) on Nile tilapia, Oreochromis niloticus, using...

Author(s): Ranzani-Paiva, Julio V. Lombardi, Solange de Carvalho, Francisco Filipak-Neto and Ciro A. Oliveira-Ribeiro

January 2013

Comparative survey of helminth parasites of Clarias gariepinus (Burchell, 1822) and Clarias pachynema (Boulenger, 1903) from the Ogun River and Asejire Dam in south-west Nigeria

A total of 250 randomly selected fish specimens consisting of 72 Clarias gariepinus and 51Clarias pachynema from Ogun River around the cattle market, Isheri, Ogun State. 73 C. pachynema and 54 C. gariepinus from Asejire Dam (which has not been reported to be polluted) in south-west Nigeria were sampled for helminth infection between September 2008 and February 2009. All...

Author(s):   Jakeline G. França, Maria J. T. Salawu M. T., Morenikeji O. A., Sowunmi A. A. and Odaibo A. B.

December 2012

Evaluation of a fast and simple method for measuring plasma lactate levels in Atlantic cod, Gadus morhua (L.)

  The aim of the present study was to investigate the validity of measuring circulatory lactate levels in plasma from Atlantic cod using Lactate ProTM, a portable meter described for measuring whole blood lactate in this species. Atlantic cod were either unstressed or subjected to short- or long-term crowding stress. Whole blood was analyzed on site, and a strong positive relationship was evident between...

Author(s): Rosa M. Serra-Llinares, Helge Tveiten, Børge Damsgård and Øyvind Aas-Hansen

December 2012

Histomorphological and anatomical study of kidney in berzem (Barbus pectoralis)

  The kidney of the vertebrate is the main organ which balances the body fluid homeostasis.Barbus pectoralis (Cyprinidae) inhabit Karoon River (Southwest Iran). There was no available report on anatomy and histology analysis of B. pectoralis. So in this study, the morphologic and microscopic features of kidney of B. pectoralis were recognized. A total number of 10 young fish freshly prepared...

Author(s): Hassan Morovvati, Mahmood Khaksary Mahabady and Saied Shahbazi

November 2012

Serum protein pattern in interspecific and intergeneric hybrids of Heterobranchus longiflis, Clarias gariepinus and Clarias anguillaris in sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE)

  Electrophoretic characterization of Heterobranchus longifilis, Clarias gariepinus, Clarias anguillaris and their intergeneric and interspecific hybrids were carried out using 12% sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE). Twenty seven fish samples (three from each mating combination) were used and a total of 16 electrophoretic protein bands were...

Author(s): Akinwande A. A., Fagbenro O. A. and Adebayo O. T.

November 2012

Rheological and structural properties of sea cucumber Stichopus japonicus during different heating temperature

  Changes in tissue structure and rheological properties of sea cucumber meat during different heating temperature were studied. Tissue structure was observed using an optical microscope and scanning electron micrograph, and its characteristic values (Wm, Dm, Rm, C*) were enumerated using image processing and analysis technique. Rheological properties (E0, τ1, η1, rupture strength) and Texture...

Author(s): Lianfeng Liu, Zhaohui Zhang, Qian Liu, Bofeng Yang, Jinfa Huang and Xin Gao

October 2012

Oomycete infections in freshwater fishes

  Mycological studies were carried out on fishes with fungal infection. A total of seventeen isolates of fungi were obtained from diseased fishes which belongs to five species namelySaprolegnia diclina, Saprolegnia ferax, Saprolegnia hypogyana, Saprolegnia parasitica andAchlya americana. All these fungi were isolated from six different species of fishes viz.Channa striatus, Channa punctatus, Clarias...

Author(s): S. A. Mastan, M. Radha Krishna Reddy and D. Sri Lakshmi

October 2012

Chemical composition of five marine microalgae that occur on the Brazilian coast

  Five native species of marine microalgae were batch cultured and their chemical composition was measured in different growth phases. The highest cell yield was recorded in Chlorellasp. Chlorella sp. and Bellerochea sp. showed a reduction of the mean cell volume throughout growth. All microalgae showed protein as the main chemical component, with peaks in the exponential...

Author(s): Giselle S. Costard, Rodrigo R. Machado, Elisabete Barbarino, Ricardo C. Martinoand Sergio O. Lourenço

September 2012

The biology of Parachanna obscura (Osteichthyes: Channidae) in Anambra River, Nigeria

  The biology of a commercially important teleost, Parachanna obscura was studied for a period of twelve months. Monthly samples of the species were randomly collected from fishermen in the lower reaches of Anambra River, Southeastern Nigeria for the twelve months. The haematological profile established were mean haematocrit of 22.5%, mean blood haemoglobin concentration of 7.23 g/dl, mean red...

Author(s): Odo, Gregory E., Onoja S. U. and Onyishi Grace C.

September 2012

Evaluation of physicochemical parameters of waste water from rainbow trout fish farms and their impacts on water quality of Koohrang stream – Iran

  Physicochemical parameters of rainbow trout farm water were evaluated to assess the potential of fish farm effluents on stream water quality. Seven fish farms were selected at Rostamabad region located on 70 km at south-west of Shahrekord-Iran. Water samples were collected from fish farms inlet and outlet at first and second sampling point. Significant differences were observed in some water factors such as...

Author(s):   Firooz Fadaeifard, Mehdi Raissy, Mostafa Faghani, Alireza Majlesi and Gholamhossein Nodeh Farahani

September 2012

Effects of feeding fry of Oreochromis niloticus on different agro-industrial by-products

  This study was conducted at the Aquaculture Research and Development Centre at Akosombo, to observe the growth and economic performance of fry of Oreochromis niloticusfed on different dietary treatments. In the experiment, four isonitrogenous (36% crude protein) and isoenergetic (physiological fuel value gross energy (GE), 18 MJ/kg) diets were formulated to contain agro-industrial by-products...

Author(s): Emmanuel Delwin Abarike, Felix Yao Klenam Attipoe and Elliot Haruna Alhassan

August 2012

Macroinvertebrates in streams: A review of some ecological factors

  Macroinvertebrates are an important component of stream ecosystems and are a link in the transfer of material and energy from producers to top level consumers and also act as excellent bioindicators of stream health. This review discusses some of the factors whichregulate the occurrence and distribution of stream macroinvertebrates namely water current, temperature, substrate, drainage...

Author(s): Qazi A. Hussain and Ashok K. Pandit

August 2012

Attitudinal analysis of women involvement in fish processing and marketing in Ondo State

  Generally, it is believed that attitude, to an extent, determines participation in any vocation. This study sets out to investigate and analyze the attitude of women involved in fish processing and marketing in Ilaje Local Government Area (LGA) of Ondo state. The study also determined the profitability and constraints faced by the respondents in the business. The influence of selected respondent’s...

Author(s): S. D. Yomi Alfred, O. O. Odefadehan and M. E. Ukut

August 2012

Toxicity of Parkia biglobosa pod extract on Clarias gariepinus juveniles

  The toxicity of aqueous and ethanolic extracts of Parkia biglobosa pods (95, 85, 75, 65 and 55 mg/l) on Clarias gariepinus was investigated under laboratory condition over a 96 h exposure period. Fish exposed to both extracts exhibited clinical signs including eventual death but was not observed in the control fish. Weight change in fish was observed as well as the effect of the...

Author(s): R. O. Ojutiku, E. P. Avbarefe, R. J. Kolo and F. P. Asuwaju

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