Home⇛Annals of Tropical Research⇛vol. 38 no. 1 (2016)

Inbreeding And Mortality Risk In A Captivepopulation Of Mhorr Gazelle (Nanger Dama Mhorr)

Ana Marquiza M. Quilicot | Roswitha Baumung

 

Abstract:

This study aimed to evaluate the genetic variation and examine the association of inbreeding level on mortality risk (at days 7, 30 and 180–weaning age) of Mhorr gazelle in captivity for the year 1969–2000 as recorded in the studbook record kept byAustralasianRegional Association of Zoological Parks and Aquaria (ARAZPA). The effective number of founders, ancestors and founder genomes was found to be 3.42, 3, and 1.44 for the studied reference population. The reference population is composed of animals which are alive, with known parents and known sex. Animals that are less than 10 years old (based on birth dates up to 2008) with no remarks on its death are considered alive. The population may not have experienced a severe bottleneck, as the values on the effective number of founders and ancestors are almost equal. However, the effective number of founder genomes is low, which demonstrates gene loss due to genetic drift. The mean inbreeding coefficients of the individual, sire and dam were found to be 0.2971 +0.1043, 0.2300 +0.1141 0.2339 +0.1070, respectively. The maximum inbreeding level of the population is 0.5247 (52.47%). This means that parent–offspring or full-sib mating must have happened. The increase in inbreeding level of an individual was found to be significantly associated (p< 0.10) with an increase in mortality risk at day 180 or weaning age. Increasing inbreeding level of sires was found to be significantly associated with increasing risk in mortality at day 30, which indicates that inbred parents also can influence the survival of an offspring. Efficient breeding programs are as important for decreasing mortality in captive populations, as the provision of optimumzoo management practices.



References:

  1. AGRESTI, A. 2002. Catergorical Data Analysis, 2nd Ed. John Wiley and Sons, Inc., New Jersey
  2. BAIS, L. 2002. “Panthera pardus” (On-line), Animal Divesrity Web. Accessed May 20, 2009 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Panthera_pardus.html
  3. BALLOU, J. and K. RALLS. 1982. Inbreeding and juvenile mortality in small populations of ungulates. A detailed analysis. Biological Conservation 24 (4), 239-272.
  4. BAUMUNG, R., FARKAS, J., BOICHARD D., MÉSZÁROS, G., SÖLKNER, J. and CURIK, I. 2015. GRAIN: a computer program to calculate ancestral and partial inbreeding coefficients using a gene dropping approach. Journal of Animal Breeding and Genetics 132 (2), 100-108.
  5. BOICHARD, D, MAINGEL, L. and E. VERRIER. 1997. The value of using probabilities of gene origin to measure genetic variability in a population. Genetic Selection Evolution 29:5-23.
  6. BROWN, J.L. and E.R. BROWN. 1998. Are inbred offsrping less fit? Survival in a natural population of Mexican jays. Behavioral Ecology 9 (1), 60-65
  7. BYERS, J. A. and L. WAITS. 2006. Good genes sexual selection in nature. Proceedings of the National Academy of Sciences of the United States of America 103 (44), 16343-16345.
  8. CASSELL, B. G., ADAMEC, V. and R.E. PEARSON, R. E. 2003. Maternal and fetal inbreeding depression for 70-day nonreturn and calving rate in Hosteins and Jerseys. Journal of Dairy Science 86 (9), 2977-2983.
  9. CASSINELLO, J. 2005. Inbreeding depression on reproductive performance and survival in captive gazelles of great conservation value. Biological Conservation 122,453-464.
  10. CRNOKRAK, P., and D.A. ROFF. 1999. Inbreeding depression in the wild. Heredity 83(3), 260-270
  11. FALCONER, D. S. and T.F.C. MACKAY. 1996. Introduction to Quantitative Genetics, 4th Ed. Longman Group Ltd., England.
  12. FRANKHAM, R., GILLIGAN, D. M., MORRIS, D. and D.A. BRISCOE. 2001. Inbreeding and extinction: Effects of purging. Conservation Genetics 2, 279-285.
  13. GUTIÉRREZ, J. P. and F. GOYACHE. 2005. A note on ENDOG: a computer program for analysing pedigree information. Journal of Animal Breeding and Genetics 122 (3), 172-176.
  14. HEDRICK, P. W. 1994. Purging inbreeding depression and the probability of extinction: full-sib mating. Heredity 73, 363-372.
  15. HEDRICK, P.W. and S.T. KALINOSWKI. 2000. Inbreeding depression in conservation biology. Annual Review of Ecology and Systematics 31, 139-162.
  16. LACY, R.C. 1993. Impacts of inbreeding in natural and captive populations of invertebrates: implications for conservation. Perspectives in Biology and Medicine 36 (3), 480-496.
  17. LACY, R. C. (1995). Clarification of genetic terms and their use in the management of vaptive populations. Zoo Biology14 (6), 565-578.
  18. LACY, R. C., ALAKS, G. and A. WALSH. 1996. Hierarchical analysis of inbreeding depression in Peromyscus polionotus. Evolution 50 (6), 2187-2200
  19. NEWBY, J., WACHER, T., LAMARQUE, CUZIN, F. and K. DE SMET. 2008. Nanger dama. In: IUCN 2008. 2008 IUCN Red List of Threatened Species.
  20. PACKER, C. and A.E. PUSEY. 1993. Dispersal, kinship and inbreeding in African lions: In N.W. Thornhill (Ed.), The Natural History of Inbreeding and Outbreeding: Theoretical and Empirical Perspectives (pp. 67-86). University of Chicago Press, Chicago, Illinois
  21. RALLS, K. BRUGGER, K. and J. BALLOU. 1979. Inbreeding and juvenile mortality in small populations of ungulates. Science 206 (4422), 1101-1103
  22. RALLS, K. and J. BALLOU. 1982a. Effect of inbreeding on juvenile mortality in some small mammal species. Laboratory Animals (16)2, 159-166.
  23. RALLS, K. and J. BALLOU. 1982b. Effects of inbreeding on infant mortality in captive primates. International Journal of Primatology (3)4, 491-505
  24. RAMIREZ, O., ALTET, L., ENSENAT, C., VILÁ, C., SANCHEZ, A. and A. RUIZ. 2006. Genetic assessment of the Iberian wolf Canis lupus signatus captive breeding program. Conservation Genetics 7,861-878.
  25. READ, A. F. and P.H. HARVEY. 1986. Genetic management in zoos. Nature 322 (6078), 408-410.
  26. THOMAS, D.L. 2015. Mating systems: Inbreeding and inbreeding depression. In H. Khatib (Ed.), Molecular and Quantitative Animal Genetics. John Wiley & Sons, Inc., New Jersey
  27. VOGT, D., SWARTZ, H.A., and J. MASSEY, J. 1993. Inbreeding: Its meaning, uses and effects on farm animals. Retrieved from University of Missouri, MU Extension
  28. WRIGHT, L. I., TREGENZA, T and D. J. HOSKEN, D. 2008. Inbreeding, inbreeding depression and extinction. Conservation Genetics 9,833-843.

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