Effects of Nutrition Intensification on the Secondary Ovary Development and Oviposition of Redclaw Crayfish

• Published in: Aquaculture nutrition 2024, Vol.2024, p.8347388
• Main Authors: Shun, Cheng, Mei-Li, Chi, Jian-Bo, Zheng, Wen-Ping, Jiang, Shi-Li, Liu, Xiao-Ying, Hang, Miao, Peng, Fei, Li, Dan-Li, Wang
• Format: Article
• Language: English
• Subjects: Amino acids; Baits; Carotenoids; Crustaceans; Diet; Eggs; Energy consumption; Females; Food; Freshwater crustaceans; Growth factors; Growth rate; Hatching; Lipids; Metabolism; Nutrients; Nutrition; Nutrition research; Offspring; Ovaries; Oviposition; Physiology; Proteins; Survival; Weight; Weight gain
• ISSN: 1353-5773; 1365-2095; 1365-2095
• DOI: 10.1155/2024/8347388

To further explore the impact of nutrient fortification on the ovarian secondary development of redclaw crayfish, four groups were set up: group ①, no feeding; group ②, formulated feeding; groups ③ and ④, formulated feed + nutrient bait. Results showed (1) the proportions of egg-bearing shrimp in groups ③ and ④. 2) The weight growth rate of group ① was the lowest, the maturation coefficient of unripe shrimp in group ④ was the highest, and the egg-holding rates in groups ③ and ④ were significantly higher than those of group ①. The hatching and survival rates of yellow eggs in group ④ were significantly higher than those in group ②. The hatching and survival rates of red eggs in groups ③ and ④ were significantly higher than those in group ①. (3) The weight gain rate of juveniles in group ④ was significantly higher than those of group ①. (4) Genes and proteins related to ovarian development were screened. In summary, group ④ had a higher proportion of egg-holding shrimp, faster ovarian development, and a higher maturity coefficient. The hatching and survival rates of eggs, and the survival and weight gain rates of the offspring were also high.