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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 34, No. 6, 2013, pp. 617-625
Bioline Code: zr13097
Full paper language: English
Document type: Report
Document available free of charge

Zoological Research, Vol. 34, No. 6, 2013, pp. 617-625

 en Artificial propagation and embryonic development of Neolissochilus benasi check for this species in other resources
PAN, Xiao-Fu; LIU, Qian; WANG, Xiao-Ai; YANG, Jun-Xing; CHEN, Xiao-Yong; LI, Zai-Yun & LI, Lie

Abstract

From 2009 to 2011, luteinizing hormone releasing hormone analogue (LHRH-A2) mixed with domperidon (DOM) was successfully applied during the artificial propagation of Neolissochilus benasi check for this species in other resources . Totally, 60 females and 100 males were injected with the hormone mixture, resulting in 47 (78.3%) females and 92 (92.0%) males being successfully spawned. A total of 1,986-5 854 eggs were spawned per female with an egg diameter varying between 2.2-2.8 mm, and an average nucleus deviation rate of 73.2%. Sperm density, vitality and life span were 16.32±2.89×109/mL, 60.6±3.2% and 70.2±5.3 s, respectively. On the whole, the embryonic development of N. benasi was similar to that of zebra fish-albeit relatively slower-lasting approximately 120 hours. The development itself can be divided into six discrete stages: zygote, cleavage, blastula, gastrula, segmentation and hatching. Results showed that the average hatching rate was 32.4%, with 86.5% of larvae surviving 45 days after hatching. During embryonic development, deformities commonly occurred on the mouth, chest, ocular region, especially in the spinal column. To try to attempt improving future breeding efforts, we provided a survey of the embryonic developmental difficulties of N. benasi using LHRH-A2 followed by several potential solutions, including providing suitable breeding conditions and minimizing capture stresses.

Keywords
Neolissochilus benasi; Artificial Propagation; Embryonic Development

 
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