Availability, Diet Composition and Feeding Behaviors of Some Commercially Important Palaemonidae Prawns in Fresh and Brackish Water of Nigeria

Bello-Olusoji, Oluayo A.; Bankole, M. T.; Sheu, A.; Oyekanmi, Funmilayo Bosede

doi:10.3923/jbs.2006.15.21

Cited by 5 publications

(1 citation statement)

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“…Ayoade et al, (2006) stated that in the tropics, where the different seasons are not clearly demarcated, the amount and type of rainfall may play a significant part in regulating the various seasonal biological rhythm [11]. The variations in chemical conditions of freshwater ponds have generally been found to be due to effects of rainfall [13]. Rainfall influences the amount of discharge into river and consequently into the lake.…”

Section: Resultsmentioning

confidence: 99%

Water Parameters of Olumirin waterfalls and abundance of Caridina africana (Kingsley, 1822) in Erin-Ijesa, Nigeria

Oyekanmi¹,

Bello-Olusoji²,

Akin-Obasola³

2017

Madridge J Aquac Res Dev

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The water parameters of Erin-Ijesa waterfalls and the abundance of Caridina africana were studied for two consecutive seasons. Water and prawn sampling were carried out bi-weekly. Prawns were collected with scoop and hand nets. Transported to the laboratory for examination for further analysis.. the physicochemical parameters of the water sample collected were determined using standard methods, the following parameters were determined; temperature (°C), conductivity (μohms/cm), pH, alkalinity, Population index of the prawns such as frequency of occurrence, relative abundance, sex ratio, male:female ratio, index of occurrence were determined. Prawn number, sex and age were more during the wet season with a peak in August. Both adults and juveniles showed a progressive increase from November to August. The results shows that average water Temperature was 27.77 ± 2.27°C, Transparency 1.71±0.39m, Depth 1.43±0.22m, Dissolved Oxygen 6.21±0.77mg/l, pH 7.25±0.68, Alkalinity 136.62±41.6mg/l, Total Dissolved Solid 402.13±253.25mg/l, Conductivity 83.40±1.86µohms/cm, Nitrate 4.76±0.76mg/l and phosphate 0.28±0.05mg/l. Erin-Ijesa waterfalls exhibited features that are typical of tropical environment, which fell within a range that can support aquatic life. High value in Condition factor for C. africana revealed the adaptability and total well being of the specie despite the unstable nature of the waterfalls.

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Section: Resultsmentioning

confidence: 99%