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Inbreeding, fluctuating asymmetry, and ejaculate quality in an endangered ungulate
E R Roldan1, J Cassinello, T Abaigar
1Instituto de Bioquímica (CSIC-UCM), Ciudad Universitaria, Madrid, Spain.
Proceedings. Biological Sciences
|March 11, 1998
Summary
Inbreeding significantly reduces ejaculate quality and sperm health in Cuvier's gazelle males. Fluctuating asymmetry reliably indicates genetic stress and poor reproductive fitness in small populations.
Area of Science:
- Conservation Biology
- Reproductive Science
- Genetics
Background:
- Human activities are causing population declines in many species.
- Small populations, especially in endangered species, face risks like inbreeding depression.
- The impact of inbreeding on male reproductive traits is debated.
Purpose of the Study:
- To investigate the relationship between inbreeding and ejaculate quality in Cuvier's gazelle (Gazella cuvieri).
- To assess the utility of fluctuating asymmetry as an indicator of genetic stress and reproductive health.
Main Methods:
- Calculated inbreeding coefficients for Gazella cuvieri males.
- Assessed ejaculate quality, including the proportion of normal sperm.
- Measured the degree of fluctuating asymmetry.
Main Results:
- A strong inverse relationship was found between inbreeding coefficient and ejaculate quality.
- Fluctuating asymmetry positively correlated with inbreeding.
- Fluctuating asymmetry negatively correlated with the proportion of normal sperm.
Conclusions:
- Inbreeding negatively impacts male reproductive traits in Gazella cuvieri.
- Fluctuating asymmetry serves as a reliable indicator of genetic stress and reduced ejaculate quality in this species.