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Reproductive biology of female Nile tilapia Oreochromis niloticus (Linnaeus) reared in monoculture and polyculture with African sharptooth catfish Clarias gariepinus (Burchell).

Shoko AP, Limbu SM, Mrosso HD, Mgaya YD - Springerplus (2015)

Bottom Line: Results revealed no significant difference in length at first maturity (L50) between females reared in monoculture and polyculture systems.Similarly, no significant differences were detected in absolute fecundity, relative fecundity, gonado-somatic index and condition factor between the two culture systems.The study concluded that early breeding of O. niloticus in captivity is not affected by the culture systems used.

View Article: PubMed Central - PubMed

Affiliation: Tanzania Fisheries Research Institute, Institute Headquarters, P. O. Box 9750, Dar es Salaam, Tanzania.

ABSTRACT
This study was conducted to assess the reproductive biology and early breeding behaviour of female Oreochromis niloticus reared in monoculture and polyculture with Clarias gariepinus in earthen ponds for 8 months. Results revealed no significant difference in length at first maturity (L50) between females reared in monoculture and polyculture systems. Similarly, no significant differences were detected in absolute fecundity, relative fecundity, gonado-somatic index and condition factor between the two culture systems. The absolute fecundity was more strongly correlated with total length and body weight than with ovary weight. The study concluded that early breeding of O. niloticus in captivity is not affected by the culture systems used. Therefore, O. niloticus production in either system can be improved only through proper pond management techniques.

No MeSH data available.


Length at L50 sexual maturity of female O. niloticus reared under monoculture (a) and polyculture (b) conditions.
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Fig4: Length at L50 sexual maturity of female O. niloticus reared under monoculture (a) and polyculture (b) conditions.

Mentions: Females reared under monoculture and polyculture systems attained the L50 at a total length of 16.38 and 16.59 cm, respectively (Figure 4a, b) with no significant difference (t = 1.96, df = ∞, p > 0.05) between the two culture systems.Figure 4


Reproductive biology of female Nile tilapia Oreochromis niloticus (Linnaeus) reared in monoculture and polyculture with African sharptooth catfish Clarias gariepinus (Burchell).

Shoko AP, Limbu SM, Mrosso HD, Mgaya YD - Springerplus (2015)

Length at L50 sexual maturity of female O. niloticus reared under monoculture (a) and polyculture (b) conditions.
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4469601&req=5

Fig4: Length at L50 sexual maturity of female O. niloticus reared under monoculture (a) and polyculture (b) conditions.
Mentions: Females reared under monoculture and polyculture systems attained the L50 at a total length of 16.38 and 16.59 cm, respectively (Figure 4a, b) with no significant difference (t = 1.96, df = ∞, p > 0.05) between the two culture systems.Figure 4

Bottom Line: Results revealed no significant difference in length at first maturity (L50) between females reared in monoculture and polyculture systems.Similarly, no significant differences were detected in absolute fecundity, relative fecundity, gonado-somatic index and condition factor between the two culture systems.The study concluded that early breeding of O. niloticus in captivity is not affected by the culture systems used.

View Article: PubMed Central - PubMed

Affiliation: Tanzania Fisheries Research Institute, Institute Headquarters, P. O. Box 9750, Dar es Salaam, Tanzania.

ABSTRACT
This study was conducted to assess the reproductive biology and early breeding behaviour of female Oreochromis niloticus reared in monoculture and polyculture with Clarias gariepinus in earthen ponds for 8 months. Results revealed no significant difference in length at first maturity (L50) between females reared in monoculture and polyculture systems. Similarly, no significant differences were detected in absolute fecundity, relative fecundity, gonado-somatic index and condition factor between the two culture systems. The absolute fecundity was more strongly correlated with total length and body weight than with ovary weight. The study concluded that early breeding of O. niloticus in captivity is not affected by the culture systems used. Therefore, O. niloticus production in either system can be improved only through proper pond management techniques.

No MeSH data available.