Loading...

Population Viability Analysis of Yangtze Finless Porpoise in the Yangtze Main Steam Suggesting that a Total Ban on Productive Fishing could be Decisive

DOI: 10.18805/IJAR.B-1353    | Article Id: B-1353 | Page : 1515-1520
Citation :- Population Viability Analysis of Yangtze Finless Porpoise in the Yangtze Main Steam Suggesting that a Total Ban on Productive Fishing could be Decisive.Indian Journal of Animal Research.2021.(55):1515-1520
Wu Bin, Xu Jingen, Wang Jianmin, Cao Lie, Wang Weiping, Zhang Song wubinjx@163.com
Address : Fisheries Research Institute of Jiujiang City, 332000, Jiujiang, China.
Submitted Date : 1-03-2021
Accepted Date : 12-05-2021

Abstract

Background: China is paying more attention to ecological systems within the Yangtze River has provided great opportunities to the conservation of the Yangtze finless porpoise (YFP). The rapid population decline of YFP in the main steam appears to have slowed, but the infrequent movement of porpoises represents a considerable threat to the long-term viability of this species in this region. We studied the population viability of YFP in the Yangtze main steam, based on published ecological and genetic information.
Methods: Vortex model was used to analyze the population viability of the YFP. The simulations were started from the year 2017 when the initial population size was 445 animals in baseline scenario. We examined the population viability for the species under demographic fluctuations and conservation scenarios.
Result: Baseline model showed the probability of extinction was 0.245; deterministic growth rate was -0.023; stochastic growth rate was -0.036. Sensitivity analysis showed differences in population trends between the baseline and each alternative scenario and the most sensitive parameters were the percentage of females breeding and mortality rates. Under different conservation scenarios, the population of the YFP in the main stream will increase by 11.0%-181.2% in 100 years.

Keywords

Conservation strategies Dispersal Extinction Neophocaena asiaeorientalis Vortex model

References

  1. Brook, B.W., O’grady, J.J. and Chapman, A.P., et al. (2000). Predictive accuracy of population viability analysis in conservation biology. Nature. 404(6776): 385-387.
  2. Chen, M.M., Zheng, Y. and Hao, Y.J., et al. (2016). Parentage Based Group Composition and Dispersal Pattern Studies of the Yangtze Finless Porpoise Population in Poyang Lake. International Journal of Molecular Sciences. 8: 1268.
  3. Donázar, J.A., Margalida, A. and Carrete, M., et al. (2009). Too sanitary for vultures. Science. 326: 664.
  4. Doak, D.F., Himes B.G.K. and Bakker V.J., et al. (2015). Recommendations for improving recovery criteria under the US Endangered Species Act. BioScience. 65:189-199.
  5. Gao, A. and Zhou, K. (1995). Geographical variation of external measurements and three subspecies of Neophocaena phocaenoides in Chinese waters. Acta Theriol. Sin. 15: 81-92.
  6. Hao, Y.J, Wang, D., Zhang, X.f. (2006). Review on breeding biology of Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis), Acta Theriologica Sinica of China. 26(2): 191-200.
  7. Hacer Y. (2018). Estimating some population parameters and stock assesment of spiny butterfly ray, Gymnura altavela (Linnaeus, 1758) the Levant Basin coast (Northeastern Mediterranean). Indian J. Anim. Res. 52(12): 1790-1796.
  8. Huang, J., Mei, Z.G. Chen, M. et al. (2020). Population survey showing hope for population recovery of the critically endangered Yangtze finless. Biological Conservation. 241: 108315.
  9. Helen, M.N. Douglas, R.L. and Daniel, C.D. et al. (2020). Application of multiple-population viability analysis to evaluate species recovery alternatives. Conservation Biology. 34(2): 482-493.
  10. He, C.H., Du, J.J. and Zhu, D. et al. (2020). Population viability analysis of small population: a case study for Asian elephant in China. Integrative Zoology. 15: 350-362.
  11. IUCN. (2010). Biodiversity, It’s Now or Never. Available online: https://www.iucn.org/content/biodiversity-its-now-or-never.
  12. Lacy, R.C. and Pollak, J.P. (2017). Vortex: A Stochastic Simulation of the Extinction Process. Version 10.2.14. Chicago Zoological Society. Brookfield, Illinois, USA.
  13. Lacy, R.C. (2018). Lessons from 30 years of population viability analysis of wildlife populations. Zoo Biology. 1-11. https://doi.org/10.1002/zoo.21468.
  14. Li YT. (2017). Study on the habitat selection, environmental capacity population viability of the yangtze finless porpoises in Tian-e-zhou semi-natural ex situ reserve. Wuhan: Institute of Hydrobiology, the Chinese Academy of Sciences.
  15. Margalida, A., Donázar, J.A. and Carrete, M. et al. (2010). Sanitary versus environmental policies: Fitting together two pieces of the puzzle of European vulture conservation. J. Appl. Ecol. 47: 931-935.
  16. Ogada, D.L., Keesing, F. and Virani, M. (2012). Dropping dead: Causes and consequences of vulture population declines worldwide. Ann. N.Y. Acad. Sci. 1249: 57-71.
  17. Ralls, K, Ballou, J.D. and Templeton, A. (1988). Estimates of Lethal Equivalents and the Cost of Inbreeding in Mammals. Conservation Biology. 2: 185-193. 
  18. Reed, DH., O’Grady, J.J. and Ballou, J.D. et al. (2003). The frequency and severity of catastrophic die-offs in vertebrates. Animal Conservation. 6: 109-114.
  19. Shirakihara, M., Takemura, A. and Shirakhara, K. (1993). Age, growth reproduction of the finless porpoise. Nephocaena phocaenoides, in the coastal waters of western Kyuhu, Japan. Marine Mammal Science. 9(4): 392-406.
  20. Slooten, E. and S.M. Dawson. (2010). Assessing the effectiveness of conservation management decisions: Likely effects of new protection measures for Hector’s dolphin. Aquatic Conservation: Marine and Freshwater Ecosystems 20: 334-347.
  21. Slooten, E. and Davies. N. (2011). Hector’s dolphin risk assessments: Old and new analyses show consistent results. Journal of the Royal Society of New Zealand. 42:49-60.
  22. Turvey, S.T., Pitman, R.L. and Taylor, B.L. et al. (2007). First human-caused extinction of a cetacean species? Biol. Lett. 3: 537-540. 
  23. Vratika, C. and Madan K.O. (2020). A critical appraisal of population viability analysis. Conservation Biology. 34(1): 26-40.
  24. Wang, D., Hao, Y. and Wang, K., et al. (2005). Aquatic Resource Conservation. The first Yangtze finless porpoise successfully born in captivity. Environ. Sci. Pollut. Res. 12: 247-250.
  25. Wang, D., Turvey, S.T. and Zhao, X. et al., (2013). Neophocaena Asiaeorientalis ssp. asiaeorientalis. IUCN 2013. IUCN Red List of Threatened Species http://www.iucnredlist. org, Version 2013.1. Downloaded on 16 July 2013.
  26. Wu, B., Wang H.H. and Fu H.Y. et al. (2018). Estimating some population parameters and stock assessment of Dark Sleeper Odontobutis potamophila in the Gaosha River, Wuyuan County, Jiangxi Province. Indian J. Anim.Res. 52(5): 664-668.
  27. Wu, B., Wang, W.P. and Wang, H.H. et al. (2020a). A retrospective Analysis on the Population Viability of the Yangtze River Dolphin or Baiji (Lipotes vexillifer). Indian Journal of Animal Research. DOI: 10.18805/ijar.B-1238.
  28. Wu, B., Wang, W.P. and Wang, Q.P. et al., (2020b). Analysis of the number of dead Yangtze Finless porpoise based on grey prediction. (in Chinese) Bulletin of Biology. 55(9): 19-20. 
  29. Yang, G, Zhou, K.Y. Gao, A.L. et al. (1998). Study on life table and population dynamics of finless porpoises. (in Chinese) Acta zoologica sinica. 18(1): 1-7.
  30. Zhang, X.F. (1992). study on age identification, growth and reproduction of finless porpoises. Chinese Acta hydrobiologica sinica. 16(4): 289-297.
  31. Zhang, X.F. and Wang, K.X. (1999). Viability analysis of finless porpoise populations in the Yangtze river. Chinese Acta Ecologica Sinica. 19(4): 529-533.
  32. Zhao, X., Barlow, J. and Taylor, B.L. et al. (2008). Abundance and conservation status of the Yangtze finless porpoise in the Yangtze River. China. Biol. Conserv. 141: 3006-3018.
  33. Zhang, X.Q. (2011). Population ecology of Yangtze finless porpoise in Dongting Lake and adjacent waters. Wuhan: Institute of Hydrobiology, the Chinese Academy of Sciences.
  34. Zhou, X.M., Guang, X.M. and Sun, D. et al. (2018). Population genomics of finless porpoises reveal an incipient cetacean species adapted to freshwater [J]. Nature Communications. 9: 1276.

Global Footprints