RELATIONSHIP BETWEEN BROODSTOCK WEIGHT COMBINATION AND SPAWNING SUCCESS IN AFRICAN CATFISH (Clarias gariepinus)

Ataguba, Gabriel Arome; Okomoda, Victor Tosin; Onwuka, Martins Chukwuemeka

doi:10.14798/71.4.694

Cited by 12 publications

(9 citation statements)

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“…These variations could be due to the size of the eggs for the different species reported. Egg size can be positively correlated with many larval traits, including larval length and hatching success (Buckley et al 1991;Rideout et al 2005;Ataguba et al 2012Ataguba et al , 2013. Ataguba et al (2009) stated that hatching and survival rates of larvae remain the key to viable and economical production of catfish.…”

Section: Discussionmentioning

confidence: 99%

Embryogenesis and Early Growth of Pure Strains and Hybrids of Sharptooth Catfish Clarias gariepinus and Sampa Heterobranchus longifilis

2016

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The embryonic development, early growth and survival of pure and reciprocal hybrid crosses of Sharptooth Catfish Clarias gariepinus and Sampa Heterobranchus longifilis were studied. The morula and blastula stages occurred 5 and 10 min earlier, respectively, in pure crosses (at 4 h, 10 min and 5 h after fertilization, respectively) than in hybrids. Timing of gastrulation in pure strain H. longifilis and the ♀ H. longifilis × ♂ C. gariepinus cross was earlier (9 h) than in pure strain C. gariepinus and ♀C. gariepinus × ♂ H. longifilis (9 h, 25 min), but similar timings were recorded during the somite stages (18 h). Hatching started at 23 h in H. longifilis, at 23 h, 10 min in C. gariepinus, and at 23 h, 15 min in the hybrids. Yolk absorption was complete in 4 d, but exogenous feeding began on the third day (72 h) when larvae weighed 0.7± 0.01 mg (mean ± SE). After 4 weeks of feeding ad libitum with shell‐free Artemia, pure crosses of both species grew better than the hybrids, and C. gariepinus recorded the highest weight (83.33 mg). The hybrids, however, showed significantly higher survival than did the pure strains.

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Section: Discussionmentioning

confidence: 99%

Embryogenesis and Early Growth of Pure Strains and Hybrids of Sharptooth Catfish Clarias gariepinus and Sampa Heterobranchus longifilis

2016

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“…Egg sizes reported in this study were within the range reported by de Graaf and Janssen (1996), Olaniyi and Omitogun (2013), Olaniyi and Omitogun (2014) for the same species. Generally, the effect of egg size transcends beyond the developmental ability of the embryo to the characteristics of hatched fry (Ataguba et al 2013). Okomoda et al (2017a) had also demonstrated the preponderant influence of maternal origin on the early morphometry characteristic of hatched larvae in their study.…”

Section: Resultsmentioning

confidence: 96%

“…More so, triploidization was induced three minutes after fertilization; thus, the consequential effect of the heat shock process could only be evident after the treatment application and not before. Egg size variation had previously been linked to broodstock quality (Bromage and Roberts 1995) and size (Ataguba et al 2013). However, the observation of an increased egg size after fertilization in this study resonates perfectly with the assumptions of Olufeagba et al (2016).…”

Section: Resultsmentioning

confidence: 99%

Embryonic development of diploid and triploid eggs ofClarias gariepinus(Burchell, 1822)

2018

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This study was conducted to evaluate the spawning performance and embryonic development of diploid and triploid eggs of the African Catfish, Clarias gariepinus. Triploidization was induced by heat shock at 41°C (for 20 min) at approximately 3 min after fertilization. Result obtained shows that the egg characteristics, fertilization percentage and the biometric parameters of hatched fry were similar in both treatments. However, more of the diploid eggs hatched (71.98%) than their triploid counterparts (56.31%). In addition, there were more observed abnormalities in the latter (35.43%) than the formal (2.71%). During the early embryogenetic cleavages stages (i.e. between two-cell and 64-cell stages), the diploid eggs advanced 5-23 min earlier than the triploid eggs. However, beyond the blastula stage, embryonic development was faster in the triploid; hence, hatching occurred 194 min earlier than the diploid eggs. The abnormal cleavages (unequal and asymmetric in nature) observed in the early stages of development in the triploids were thought to have resulted in the development of the somite at 50% epiboly. Consequently, abnormal hatched triploid fry from such eggs were short trunked. This study also affirmed the suitability of erythrocyte morphological as a simple and reliable index of discrimination between diploid and triploid African catfish.

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“…The better hatchability recorded in Ovaprim ® may be because it leads to the ovulation of large egg size compared with the natural hormone. Egg size has been previously reported to have significant positive correlation with many breeding traits such as hatchability (Ataguba et al , 2013), larval length and survival (Buckley et al , 1991 and Rideout et al , 2005). Hempel (1979) had also reported that larger eggs provide more energy for larvae development which is explained by a larger yolk sac.…”

Section: Discussionmentioning

confidence: 99%

Spawning performance of Clarias gariepinus (Burchell, 1822) induced with ethanol preserved and fresh catfish pituitary extract

Okomoda

Tiamiyu

Kwaghger

2017

Zygote

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This study was conducted to determine the efficacy of preserved and fresh pituitary extract of Clarias gariepinus (Burchell, 1822) to induced spawning in the same species. Growth performance of fry was also monitored for 15 days to determine the possible effect of natural hormone treatment on the fry. Pituitary glands (PG) were obtained from 12 male broodstocks, six extracted PG were preserved in 96% ethanol 24 h before injection, while the other were extracted and used in their fresh state. The PG solutions (1 g ml-1 of saline water) were injected at 1 ml kg-1 of the female broodstock. Ovaprim® (a synthetic hormone) was used as the control and administered at a rate of 0.5 ml kg -1 of fish. After a uniform latency period of 9 h 30 min, fish were striped, fertilized, incubated and the performance evaluated. Results obtained revealed better hatching performance using Ovaprim® synthetic hormone (64.52%), however, preserved PG gave better hatchability (59.74%) than fresh PG extract (51.39%). After 15 days of feeding ad libitum with shell-free Artemia cysts, the growth of fry spawn with preserved PG was comparable with that of the control, while least performance was observed using the fresh PG. It was concluded that preservation of PG in ethanol 24 h before injection had a positive effect on breeding performance and could be exploited in the commercial production of C. gariepinus fingerlings.

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RELATIONSHIP BETWEEN BROODSTOCK WEIGHT COMBINATION AND SPAWNING SUCCESS IN AFRICAN CATFISH (Clarias gariepinus)

Cited by 12 publications

References 0 publications

Embryogenesis and Early Growth of Pure Strains and Hybrids of Sharptooth Catfish Clarias gariepinus and Sampa Heterobranchus longifilis

Embryogenesis and Early Growth of Pure Strains and Hybrids of Sharptooth Catfish Clarias gariepinus and Sampa Heterobranchus longifilis

Embryonic development of diploid and triploid eggs ofClarias gariepinus(Burchell, 1822)

Spawning performance of Clarias gariepinus (Burchell, 1822) induced with ethanol preserved and fresh catfish pituitary extract

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