Scientific Papers Series Management, Economic Engineering In Agriculture And Rural Development .

 Journal

 Impact Of Municipal Waste On The Hydrochemistry Of Epe Lagoon, South Western, Nigeria.

 Igejongbo, T.F., Adeparusi, E. O. And Dada, A.A.

 2018

This study investigates the impact of municipal waste on the physicochemical parameters of Epe Lagoon. Three stations were chosen where a lot of human activities take place. The samples were collected from surface water at 10cm depth for 12 consecutive months in duplicates between August 2014 – August 2015. pH, dissolve oxygen, conductivity, total dissolve solids, salinity, temperature, turbidity, dissolved oxygen and the biological oxygen demand were measured. The pH measurement was highest in March with mean value of 7.9±0.17, a rainning month and lowest in October, a dry month with mean value of 6.1±1.21 The mean dissolved oxygen value was 7.17±0.67 mg/l. The annual mean salinity value was 0.08 ppt. The water turbidity was highest in March with mean value of 68.3±3.15 mg/l and lowest in the month of June with mean value of 47 ±1.21 mg/l. The mean nitrate value was 1.31±0.07 ppm. The mean value of alkalinity was 58.34±0.67 mg/l and that of phosphate was 7.52±0.67 mg/l. Conductivity mean values ranged from 76.94 ±5.35 uhoms/cm-1 in the month of November to the highest in the month of June with a value of 94.87 ±1.39 uhoms/cm-1. In this study BOD mean value was 1.84±0.67 mg/l . Regulatory bodies should spring into action to control the dumping of municipal waste along the course of the lagoon so as to prevent the extinction of aquatic life in the water body. 

 Journal Of Entomology And Zoology Studies

 Journal

 Fecundity, Maturation And Spawning Frequency Of Mormyrus Rume (Cuvier And Valenciennes, 1894) From Epe Lagoon, Nigeria

 Igejongbo, T.F., Adeparusi, E. O. And Dada, A.A.

 2018

This study aims at studying its reproductive biology of Mormyrus rume using Epe Lagoon as a case study during the period of August 2014 to July 2016. A total of 867 specimens were collected using gill and cast net. Standard techniques were used in the analysis of sex ratio, total length (TL), gonad weight (GW), body weight (BW), fecundity, stages of maturation and gonadosomatic index on the fish species. Sex ratio of 1 male to 1.13 females was observed. Six stages of maturity: Immature, resting, maturing, ripe, spawning and spent were observed in this study. The immature fishes occurred mostly in October to March and the spawning stage occurred mostly from May to August. Egg size ranged from 0.3mm to 1.86mm Fecundity estimates for this species ranged from 4,211 to 31,499 eggs and the gonadosomatic index ranged from 8.85% to 104% meaning a high percentage of fish body mass was converted to gonads for reproduction. It was observed that spawning was not synchronized in the fish species. Therefore this study provides information on some aspects of the reproductive biology of this commercially important fish species in Epe Lagoon for its optimum utilization, conservation and potential for aquaculture. 

 International Journal Of Fisheries And Aquatic Studies

 Journal

 Aspects Of The Reproductive Biology Of Elops Lacerta (valenciennes, 1847) From Epe Lagoon, South Western Nigeria

 Igejongbo, T.F., Adeparusi, E. O. And Dada, A.A.

 2018

The present investigation was conducted to study aspects of reproductive biology of Elops lacerta from Epe lagoon, South western Nigeria. A total of 800 specimens of Elops lacerta were examined between August 2014 – July 2016. Data on sex ratio, total length (TL), gonad (GW) body weight (BW), fecundity, stages of maturation and gonadosomatic index (GSI) were carried out on this specie. The sex ratio of 1 male to 0.6 females was observed. Six stages of maturity: immature, resting, maturing, ripe, spawning and spent were observed in this study. The GSI values varied from 10 to 15%. Fecundity ranged from 716 to 11,345 in number. The eggs were as small as 0.04mm and as big as 1.37 mm in diameter. The fish ranged from 10cm to 25cm standard length. The information generated through this study act as a baseline data for future ecological and biological studies of this species. 

 International Journal Of Ecology And Environmental Studies

 Journal

 Food And Feeding Habits Of Clarias Gariepinus (Burchell, 1822) In River Ogbese, South-Western Nigeria.

 International Journal Of Ecology And Environmental Studies 3 (2), 54-60

 2016

Dietary habits of Clarias gariepinus was studied in River Ogbese, Ondo State, Nigeria. Fish specimens were procured from artisanal fishermen every two weeks. Specimens were usually injected with 4% formalin at the fishing station prior to laboratory analysis. A total of 60 specimens were analysed for gut content using numerical and frequency of occurrence methods. Data collected showed that Clarias gariepinus is an omnivorous fish because they feed mainly on plant parts, detritus, fish part, insects and crustaceans. By volume, plant parts, fish parts, detritus and crustaceans accounted for 16 and 19%, 9 and 11%, 10 and 11.90%, 8 and 11.90% of the food of adult Clarias gariepinus specimen, respectively. According to the ranking index, plant parts were the prominent food item for adult and juvenile specimen. As the fish size increased, the preference for plant parts increased and the preference for protozoans, cyst, worms and diatoms decreased. Plant materials occurred in 100% of the stomach of adult specimen, while the value was 57% in juvenile specimen. Worms and algae were also present in all stomachs containing food.