REPRODUCTIVE PERFORMANCE OF HATCHERY-BRED, WILD-CAUGHT BROODSTOCK, AND THEIR OUTBREED OF THE AFRICAN CATFISH Clarias gariepinus (Burchell, 1822)

Abstract

This study was conducted to evaluate the reproductive performance of hatchery-bred and wild-caught broodstock of Clarias gariepinus. Thirty pairs of each hatchery-bred and wild-caught broodstock (15 females and 15 males) was used for the study. Induced breeding was carried out in four groups with three replications at a ratio of 1:1 by hypophysation method. Group A: hatchery-bred male and hatchery-bred female (HBM m + HBF f); B: wild-caught male and wild-caught female (WCM m + WCF f), C: hatchery-bred female and wild-caught male (HBF f+ WCM m) and D: wild-caught female and hatchery-bred male C. gariepinus (WCF f + HBM m). Results showed that egg diameter, sperm motility, sperm density, and male GSI were not significantly different (P>0.05) whereas ovary weight, sperm volume, fecundity, female GSI, and percentage fertilization were significantly higher (P<0.05) in hatchery-bred broodstock than wild-caught broodstock. Hatchability was significantly higher (P<0.05) in Group C and D than A and B. In conclusion, a better reproductive performance in C. gariepinus with an economic advantage could be recorded through the combination of wild-caught and hatchery-bred broodstock.

Dietary Probiotic Supplementation; Effects on Fecundity and Relationship with Biometric Parameters of Clarias gariepinus

“…In addition, fecundity is used to assess fish stocks, egg and larval survival, estimate stock size, predict stock exploitation, and predict fish recruitment [9] and [10]. Fecundity information can be used to estimate the number of fry and fingerlings produced and is an important criterion for aquaculture professionals to consider when selecting new species for aquaculture [11] [12] [13] [14]. Clarias gariepinus is a popular and most preferred farmed fish species in Nigeria [14].…”

“…Fecundity information can be used to estimate the number of fry and fingerlings produced and is an important criterion for aquaculture professionals to consider when selecting new species for aquaculture [11] [12] [13] [14]. Clarias gariepinus is a popular and most preferred farmed fish species in Nigeria [14]. C. gariepinus has proven to be very hardy, disease-resistant, fast-growing, attractive market size, high stocking density, low environmental tolerance, acceptance of artificial diets, and high market value [15], [16], [17].…”

“…C. gariepinus has proven to be very hardy, disease-resistant, fast-growing, attractive market size, high stocking density, low environmental tolerance, acceptance of artificial diets, and high market value [15], [16], [17]. Furthermore, Eyo et al, [14] have shown that C. gariepinus also exhibits excellent reproductive traits, such as high fecundity, ease of induction or artificial propagation, and rapid gonad maturation in captivity. Currently, Nigeria's aquaculture production costs are increasing due to several factors such as increasing feed costs [18] ( Eriegha et al, 2022).…”

REPRODUCCIÓN INDUCIDA DE GAMITANA Colossoma macropomum USANDO EXTRACTOS DE PITUITARIA DE CARPA COMÚN Y DE PAICHE

“…La hipofización aún hoy, continúa siendo una técnica aplicada ampliamente en Latinoamérica (Paschoalini et al, 2021) y África (Okomoda et al, 2017;Eyo et al, 2020), donde los costos de adquisición de inductores sintéticos importados suelen ser altos, obligando a los piscicultores a aprovechar extractos hipofisarios de peces nativos y otros vertebrados para estos fines (Streit Jr. et al, 2005;Martins et al, 2008;González et al, 2010). Dentro del grupo de extractos hipofisarios más usados resalta el extracto de pituitaria de carpa o EPC (Zaki et al, 2020, Caldas et al, 2021Romanova et al, 2021).…”