Growth Performance of Wild Strains of Clarias gariepinus from Nigerian Waters

Megbowon, I; Bombata, H.A. Fashina; Akinwale, M.M.A.; Hammed, A.M.; Mojekwu, T.O.

doi:10.3923/jfas.2014.252.256

Cited by 12 publications

(12 citation statements)

References 10 publications

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“…Also, these results are better than those reported by [6] after 17 days in hapa (35.5 to 64.8%). At the juvenile stage, the survival rate remained low (<75%) compared to the results generally reported under controlled conditions in this species: [3] (80 %) in the same species subjected to an optimal diet after 52 days of breeding; [19] (70 à 96 %) and [20] (95 à 97.66 %) reported in Nigeria respectively in hapas and concrete tanks in six strains of the same species. This could be due to cannibalism, well known in this species [18] .…”

Section: Discussioncontrasting

confidence: 53%

Survival and growth performances of Clarias gariepinus (Teleotei: Clariidae) fingerlings according to the hormone type in recycled water in South Cameroon

Tiogué¹,

Ambela²,

Nana³

2018

NRCR

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In order to compare effects of the of hormone type (Ovaprim and pituitary extracts) on survival and growth performances of African catfish Clarias gariepinus in recycled water; this study was conducted from April to August 2016, in the South Region Cameroon. The main results are as follows: The survival rate was higher in fish from females treated with pituitary extracts regardless of stage of development, without significant differences (P> 0.05) between treatments. The fish treated with Ovaprim, expressed higher mass and linear growth performances than those treated with pituitary extracts, but not significantly (P> 0.05) regardless the considered stage of development. The relative growth rate (TCR) showed that fish grow faster at the fry stage than at the juvenile stage for both hormone types. Growth was negative Allometric type and K factor was ˂ 1 during breeding. It was concluded that the use of the synthetic hormone is not essential for optimum production of Clarias gariepinus fingerlings.

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Section: Discussioncontrasting

confidence: 53%

Survival and growth performances of Clarias gariepinus (Teleotei: Clariidae) fingerlings according to the hormone type in recycled water in South Cameroon

Tiogué¹,

Ambela²,

Nana³

2018

NRCR

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“…Environmental factors that may affect egg and sperm quality in fish include the diet of the brood fish and the physiochemical conditions of the water in which the eggs are incubated (temperature, salinity and pH of the water). The hatching process is dependent upon water temperature while the hatching rate is depends on the water quality, oxygen level, temperature, and water hardness (Megbowon et al, 2013). The hatching rate is higher for magnetized water treatments of 0.10, 0.15 and 0.20 T, than the control group (Figure 4).…”

Section: Effect Of Exposure To Magnetic Field On Hatching Percentagementioning

confidence: 96%

Effect of exposure of African catfish (Clarias batrachus) to magnetic field on water properties and egg hatching

Hassan

Rahman²,

Kamaruddin³

et al. 2018

Borneo J. Mar. Sci. Aqua

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Magnetic water is produced when water is passed through a magnetic field with the purpose of modifying its structure. The changes in physical and chemical properties of magnetised water affect the biological properties of the organisms. The magnetic field can affect the growth of fish from the embryo to the adult stage. The present study evaluates the effects of magnetic field exposure on water properties and hatchability of the eggs of African catfish (Clarias gariepinus). Water was passed through magnetic devices of different intensities; namely: 0.10, 0.15 and 0.20 Tesla. The dissolved oxygen (mgL-1) and pH levels were found to significantly (P â‰¤ 0.05) increase from 5.92 mgL-1 to 6.33 mgL-1, and from 8.03 to 8.19, respectively. Ammonium (NH4-N mgL-1) level declined significantly (P â‰¤ 0.05) (0.20 mgL-1 to 0.16 mgL-1). Salinity (ppt), conductivity (uscm-1), specific conductance (uscm-1) and total dissolved solids (mgL-1) also decreased after magnetization. Significant increase in the rate of hatching was attained in water exposed to a magnetic field of 0.10, 0.15 and 0.20 T. The study demonstrated the benefits of using magnetic devices that are simple, practical and cost-effective.

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“…Each male was dissected carefully and their milt sac obtained. A small incision was made on the lobes of the testes with a sharp razor blade and the milt was squeezed into a dry Petri dish containing the collected eggs (Nwadukwe et al, 1993) E. Artificial fertilization Dry method of fertilization was used where the milt obtained from the male fishes was squeezed gently onto the stripped eggs obtained from the females accordingly and stirred gently and thoroughly using plastic spoon for about 1-2 minutes to allow contact and adequate fertilization (Megbowon et al, 2013), after which normal saline was added before spreading the eggs on the spawning nets in the incubation units prepared earlier for that purpose (Delince et al, 1987;Viveen et al, 1985).…”

Section: Procurement Of Ripe Eggs and Miltmentioning

confidence: 99%

EFFECT OF DIFFERENT MALE-FEMALE BROODSTOCK RATIO ON THE INDUCED BREEDING PERFORMANCE OF Clarias gariepinus.

MaradunH¹

2018

IJAR

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Growth Performance of Wild Strains of Clarias gariepinus from Nigerian Waters

Cited by 12 publications

References 10 publications

Survival and growth performances of Clarias gariepinus (Teleotei: Clariidae) fingerlings according to the hormone type in recycled water in South Cameroon

Survival and growth performances of Clarias gariepinus (Teleotei: Clariidae) fingerlings according to the hormone type in recycled water in South Cameroon

Effect of exposure of African catfish (Clarias batrachus) to magnetic field on water properties and egg hatching

EFFECT OF DIFFERENT MALE-FEMALE BROODSTOCK RATIO ON THE INDUCED BREEDING PERFORMANCE OF Clarias gariepinus.

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