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Relationship between the abdominal sagging index and the reproductive performance of the Roman goose

  • S. C. Chang (Kaohsiung Animal Propagation Station, Livestock Research Institute, Council of Agriculture) ;
  • M. J. Lin (Changhua Animal Propagation Station, Livestock Research Institute, Council of Agriculture) ;
  • L. J. Lin (School of Chinese Medicine, College of Chinese Medicine, China Medical University) ;
  • S. Y. Peng (Department of Animal Science, National Pingtung University of Science and Technology) ;
  • Tzu Tai Lee (Department of Animal Science, National Chung Hsing University)
  • 투고 : 2022.06.10
  • 심사 : 2022.08.22
  • 발행 : 2023.04.01

초록

Objective: This research aimed to explore the changes in the observed abdominal sagging index (ASI) and reproductive performance of Roman male and female geese during the breeding period. Methods: The 339 six-month-old breeding geese (109 male; 230 female) were used in this study, in which five male and five female geese were slaughtered on a monthly basis to record the ASI. Results: The short diameter of the testes of the male goose when the female goose lays eggs and in the second, third, and fourth months was significantly wider than in the fifth months (19.0, 20.8, 21.4, and 19.6 vs 12.7 and 14.0 mm/bird; p = 0.0105). On the other hand, the testicular weight of the male goose in the second and third months after the female goose lays eggs was significantly higher than that in the second and fifth months after laying (0.33% and 0.37% vs 0.11% and 0.19%; p = 0.0212). During the exploring period, the length and weight of the fallopian tube, the weight of the ovary, the number of follicles in 2 to 3 cm, the number of follicles in 3 to 4 cm, the fallopian tube weight in the carcass weight percentage, and the ovary weight in the carcass weight percentage all demonstrated a significant curve response. Further, female ASI was positively correlated with reproductive tract length (r = 0.815; p<0.05) and egg production per female (r = 0.790; p<0.05). Conclusion: The ASI classification method is more objective and easy to distinguish. This scoring method has a high correlation with the number of eggs laid by each goose and the length of the reproductive tract, inferring that the goose observation could take advantage of ASI during egg-laying and can predict the reproductive system development during the laying period and determine when the breeding goose begins to lay eggs.

키워드

과제정보

The authors would like to thank colleagues in the Changhua and Kaohsiung Animal Propagation Station, COA-LRI and the Ministry of Science and Technology (MOST 109-2313-B-005-008-MY3; 110-2634-F-005-006 project Smart Sustainable New Agriculture Research Center, China Medical University (CMU108-S-46) and the iEGG and Animal Biotechnology Center from The Feature Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan for supporting this study.

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