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Inclusion of Annona Muricata to Diets of Clarias gariepinus Parentss and its Efficacy on the Growth of Subsequent Generations
Abstract
The objective of the extant study was to evaluate the weight, length, and survival of Clarias gariepinus first and second filial generation. The knowledge on the weight, length, and survival of Clarias gariepinus first and second filial generation is curbed, however, such information is precise for the culturing of the species, to discover the health condition of the fish and it will be beneficial in biological and genetic study, hence, aid to source for various ways to reduce inbreeding, enhance the growth and survival of the species. The growth in weight was ascertained using a sensitive weighing digital balance, while the growth in length was determined using the meter rule. The hatchlings were from the previous breeding exercise whose parents and F1 broodstock were fed with different inclusion levels of Annona muricata. 750 hatchlings of F1 and F2 with mean body weight and length of 0.03g and 0.5cm; 0.05g and 0.7cm were stocked in an indoor flow-through fibre pond (1.0 x 1.0 x 1.0 m3) in triplicate in a completely randomized design. The 3-day-old larvae of both F1 and F2 generations were fed ad libitum with 0.2mm coppens as a starter feed twice daily for 7 days. While 0.3 to 3.0mm were further used based on the weight and length of the fish for 49 days. Every week the weight and length were measured and mortality was recorded. Results: The results revealed continuous and exponential growth and a significant difference between the hatchlings across the various treatments and across the generations. The weight, length and survival rate were higher in hatchlings whose parents consumed A. muricata, the diet 5 (4% inclusion) of the F1 generations had 40.22g, 21.6cm and 94% hatchlings survived after 56 days and F2 generations had 63.9g, 22.9cm and 92% of the hatchlings survived while the least was recorded in the 0% inclusion designated as D1 the F1 recorded weight 30.1g, length 12.9cm and the survival was 53% while the F2 was weight 16.1g, 13.6cm and 38% survived. The temperature of the F1 during breeding and rearing ranged between 27 to 29oC while that of the F2 generations was between 18 to 24oC. The research revealed that both F1 and F2 generations that the parents consumed A. muricata performed significantly better than the generation that did not consume the additive, in addition, temperature and stocking density play an essential role in the growth and survival of the fish.
