Ebinimi J. Ansa

• Dr
• Research Director at Nigerian Institute for Oceanography and Marine Research (NIOMR)

A study to compare the intensity and prevalence of parasites in the organs of pond cultured fish was carried out at the African Regional Aquaculture Centre, Aluu, Rivers State. A total of 85 Clarias gariepinus samples were examined from 3 earthen ponds. All Ponds had same water sources and were limed and screened. Fish were fed with processed feed...

Oil-bearing communities in the Niger Delta region of Nigeria are faced with the adverse effects of pollution that emanates from oil and gas exploration and exploitation activities in the region. Although sabotage has been blamed for almost every spill, unconfirmed reports indicate that there is gross negligence on the part of oil companies operatin...

The effect of kiln smoking and manual extraction of oil from catfish was investigated. Oil from African Catfish, Clarias gariepinus was extracted by smoking with a WAAPP-NIOMR 50kg capacity Kiln and by manual extraction from the fish abdominal walls and around the organs was rinsed under running water and boiled over medium heat with a Salad master...

The effectiveness of clove seed extracts as a viable anaesthetic agent in transportation of Tilapia guineen-sis were evaluated. Juveniles of T. guineensis (mean length 13.12cm ±1.20; mean weight 45.64g ±1.84) were exposed in three replicates to different concentrations (0.00mg/L-control; 5.00; 10.00; 15.00; 20.00 and 25.00mg/L) of clove seed aqueou...

ABSTRACT The study of Length-weight relationship (LWR) of aquatic species is significant in fisheries biology because of their usefulness in estimating weight parallel to a given length. In this study, ten locations covering five coastal states vis-à-vis Lagos Makoko (LM), Lagos Apapa (LA), Lagos Takwabay (LT), Lagos Tincan (LC), Lagos Folu (LF),...

A survey was conducted to determine the composition and abundance of plankton species in the Forcados River. Plankton samples were collected monthly from the Lower Forcados River from January to April, 2014 using plankton net of 60 µ mesh size. The plankton was preserved in Lugol's iodine and 10% buffered formalin and stored high density polyethyle...

Invited paper presented at the 5th International Christian Business Exhibition and Conference (IC-BEC 2015)

The acute toxicity and the effect of sub-lethal concentrations of calcium carbonate on the morphology of M. macrobrachion were investigated under laboratory conditions. The prawns were exposed at 0, 160, 320, 640, 1280, 2560 and 5120 mg L-1 of CaCO3 using static renewal bioassay for 96 h for the acute toxicity test. The prawns were also exposed for...

A study was conducted to assess buffering efficiency of oyster (Crassostrea gasar) shells on acidic borehole water for fish farming. Eighteen (18), 100-litre shaded plastic tanks (3/4-filled, pH 4.0) of three replicates per treatment of 270 g buffer agent were used. There were four trials of six treatments (T) namely control (C) [T1], calcium carbo...

Fish farmers in Nigeria have successfully bred catfish on a commercial scale but are somewhat reluctant to grow tilapia because of uncertainties on the output and requirements for hatchery production and profitability of the business. In response to this need, trials were carried out in experimental earthen ponds at the African Regional Aquaculture...

Protein is the most important nutrient in fish diet. The protein in the ingrehents must not only be chemically available but it must also be biolopcally available for the fish to utilize it. An experiment was carried out to find out the comparative effect of imported fish meal, blood meal and local fish waste based diets on the growth and survival...

Sampling was carried out in a mangrove intertidal mud flat, east of Eagle Island, Port Harcourt, Nigeria. A seine net was used in sampling at springtide and neap tide. Two positions at the site -downstream and upstream -were sampled at low and flood tides respectively. A total of 120 specimens of Aplocheilichthys spilauchena ranging from 35 mm to 5...

The microbiological quality of raw and processed periwinkles obtained from brackish water earthen pond of the African Regional Aquaculture Centre, Buguma, Rivers State, Nigeria was studied. The samples were harvested at exactly 11 am on a Monday morning, at high tide and water temperature of about 29°C. Ninety samples were analyzed and used for...

Hatching requirements and description of Stage I larva of the estuarine river prawn, Macrobrachium macrobrachion. For the effective propagation of any species, techniques need to be developed for adoption by farmers. In line with this, a study was carried out to determine the hatching requirements and larval development of Stage I larva of the es-t...

A baseline study of the intertidal and subtidal zones of the Andoni flats was conducted to determine the basic physical and chemical characteristics of the sediment. Sediment characteristics revealed sandy to loamy (muddy) sand soils with pH of 4.09 to 5.04. Values of organic carbon varied from 0.17% in the sandy soil to 3.01% in the muddy sand soi...

Physicochemical characteristics of the interstitial fluid of the sediment of the intertidal and subtidal zones of the Andoni flats were studied. The results for the interstitial fluid showed low dissolved oxygen levels (0.1 – 1.3mg/l), high temperature values (26.2 -32.4°C), wide salinity range (8 – 21ppt) and near neutral pH (6.26 – 7.76) across s...

The Niger Delta region with a coastline of 400 km is located in Southern Nigeria. A vast area of about 20,000 km 2 and the drainage basin of the Niger and Benue Rivers confluence empties into the Atlantic Ocean. Shrimp production in the Niger Delta has been practiced for decades through harvesting of wild shrimps by artisanal fishermen and shrimp t...

The cost of and demands for available land for residential and industrial purposes are increasing as the human population is increasing. Water quality is one of most critical factors besides good feed/feeding in fish production and it varies with culture systems or media amongst other factors. Surface water samples were collected from freshwater ti...

The microbiological quality of raw, boiled and oven roasted oysters were determined. The study was based on isolation and density enumeration of microbe indicator organisms and other pathogens. Thirty oysters' samples were analyzed from each of the raw, boiled and roasted samples. Salmonella typhi, Shigella dysenteriae, Escherichia coil, Erwinia am...

Two hundred indigenous pink shrimps, Penaeus notialis and 19 exotic giant tiger Shrimps, P. monodon from Buguma Creek were caught in brackish water tidal ponds of the Nigerian Institute for Oceanography and Marine Research, Buguma in April, May and June 2005. The length-weight relationship of both species indicated allometric pattern of growth. Reg...

The vertical and surface distribution of Parailia pellucida was investigated in relation to tidal, seasonal and light or photoperiod variation for 24 months in the freshwater reaches of the lower Nun River. The specimens were caught with gillnets of 8, 12 and 15 mm stretched mesh sizes that measured 35 m in length and 3 m in depth, with a surface a...

The length weight relationship of three benthic bivalves namely, Senilia (= Anadara) senilis (bloody cockle), Tagelus adansonii (knife clam), Tellina nymphalis (soft shell clam) from the Andoni Flats were determined. The bivalves which are of ecological importance were obtained from the intertidal areas of the Andoni Flats. Shell lengths of the biv...

Variations in Oxygen Carrying Capacity of Sarotherodon melanotheron was investigated. The fish were acclimated using three media (brackish water, gradual reduction in salinity and fresh water) for a period of seven days. The results indicated various levels of reduction (p<0.05) exhibited by both juveniles and adults, before and after acclimation i...

Effects of transportation induced stress, on the haematology of Sarotherodon melanotheron was investigated. One hundred and twenty adult male and female S. melanotheron mean weight (44.24 g ±0.26) and mean length (14.12 cm±0.34) were harvested at low tide from the recruitment ponds of the African Regional Aquaculture Centre, Brackish water research...

Crassostrea gasar, the edible mangrove oyster is a conspicuous inhabitant of the mangrove ecosystem. Being a hard substrate bivalve it is usually found attached to any hard substrate in the estuarine/coastal environment such as prop roots of mangrove trees. It has a wide salinity tolerance range of 10-25 ppt and grows and develops well at temperatu...

Many microfloral factors of the fish nursery ecosystem act to the favour or detriment of fish larvae at night. In this experiment, 2 replicates each of three treatment freshwater ponds were tested with varying nutrient regimes to assess their impact on phytoplankton populations at night. The first treatment-A (200 m2 surface area supplied 70 kg ha...

The purpose of this paper is to create awareness on the significance of integrated fish farming in organic waste reclamation, recycling and re-use. Example of integrated fish farming practiced at a micro-level in the Niger Delta of Nigeria is crop-snailry-poultry (Chicken) - livestock (pig) - cum-fish production. In this system, fish production rem...

Population growth parameters were determined for four benthic bivalves namely Pitar tumens (Venus clam), Senilia senilis (bloody cockle), Tagelus adansonii (knife clam) and Tellina nymphalis (soft shell clam) in the Andoni flats in a two year sampling period. Estimates from FiSAT indicated a steady growth of populations. Mean values of asymptotic l...

The growth response of Oreochromis niloticus (mean weight = 7.54 ± 0.91g) was determined under integrated fish cum piggery system at the African Regional Aquaculture Centre (ARAC), Port Harcourt, Nigeria. The experiment was conducted for 10 weeks between October and December 1999 in order to determine fish growth using pig manure (treatment) as com...

The daytime composition and relative abundance of zooplankton species were studied in three treatments of two replicate earthen ponds each with varying nutrient sources and water replenishment regimes. Treatment-A (200,112 surface area supplied 900kgha-1 month-1 pig manure only). Treatment-B (200m2 surface area supplied 70kgha-1 montifi pig manure,...