Inbreeding depression on reproductive performance and survival in captive gazelles of great conservation value

被引:32
作者
Cassinello, J [1 ]
机构
[1] UCLM, CSIC, JCCM, IREC, Ciudad Real 13005, Spain
关键词
captive populations; inbreeding depression; longevity; sexual maturity; ungulates;
D O I
10.1016/j.biocon.2004.09.006
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Here I present a detailed analysis of individual inbreeding coefficient effects on some reproductive parameters and longevity in three species of gazelles under different conservation status: vulnerable dorcas gazelle. endangered Cuvier's gazelle. and extinct in the wild mhorr gazelle. The novelty of this study stems from the inclusion of both males and females in analyses including a large database of information collected during two decades of periodical studbook inventories for these species. Translocations to different zoo locations of the extinct subspecies mhorr gazelle do not apparently affect reproductive performance (population sex ratio) or individual longevity. In agreement with previous works, the average inbreeding coefficients vary inter-specifically, being higher in Cuvier's, followed by mhorr and dorcas gazelles. This reflects the different population size of the founding individuals of each scepies captive population. Sexual maturity and age at first birth follow an allometric pattern, occurring at an earlier age in the smallest species (dorcas), followed by Cuvier's and then the mhorr gazelle. Twinning in Cuvier's gazelle depends on maternal experience. as it is less frequent in primiparous females. Inbreeding affects neither twinning nor sex ratio. Mhorr gazelles' studbook shows several causes of death and it emerges that a higher proportion of non-inbred females die due to pathologies than males. although both sexes show similar proportion of mortal pathologies when inbred. Multifactor ANOVA shows that longevity decreases with inbreeding level and that females live longer than males in the three species of gazelles studied. as expected in polygynous mamma Mhorr and dorcas non-inbred females show higher juvenile survival than males, whereas inbred individuals show a similar declining juvenile survival, particularly in mhorr and Cuvier's gazelles. Finally. it is discussed the apparent inbreeding tolerance in Cuvier's species, and the great value keeping and studying long term data of well-monitored captive populations may prove to the conservation of threatened species. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:453 / 464
页数:12
相关论文
共 84 条
[51]   Inbreeding effects in wild populations [J].
Keller, LF ;
Waller, DM .
TRENDS IN ECOLOGY & EVOLUTION, 2002, 17 (05) :230-241
[52]   Inbreeding and its fitness effects in an insular population of song sparrows (Melospiza melodia) [J].
Keller, LF .
EVOLUTION, 1998, 52 (01) :240-250
[53]  
Kleiman D.G., 1986, P959
[54]   The effect of demographic characteristics on the success of ungulate re-introductions [J].
Komers, PE ;
Curman, GP .
BIOLOGICAL CONSERVATION, 2000, 93 (02) :187-193
[55]   POWER AND TYPE-I ERROR RATES OF NEW PAIRWISE MULTIPLE COMPARISON PROCEDURES UNDER HETEROGENEOUS VARIANCES [J].
KROMREY, JD ;
LAROCCA, MA .
JOURNAL OF EXPERIMENTAL EDUCATION, 1995, 63 (04) :343-362
[56]  
Lacy RC, 1996, EVOLUTION, V50, P2187, DOI 10.1111/j.1558-5646.1996.tb03609.x
[57]   EFFECTS OF INBREEDING AND HETEROSIS IN HEREFORD FEMALES ON FERTILITY, CALF SURVIVAL AND PREWEANING GROWTH [J].
MACNEIL, MD ;
DEARBORN, DD ;
CUNDIFF, LV ;
DINKEL, CA ;
GREGORY, KE .
JOURNAL OF ANIMAL SCIENCE, 1989, 67 (04) :895-901
[58]  
MILLAR JS, 1977, EVOLUTION, V31, P370, DOI [10.2307/2407759, 10.1111/j.1558-5646.1977.tb01019.x]
[59]   DEMOGRAPHIC CONSEQUENCES OF INBREEDING IN REMNANT POPULATIONS [J].
MILLS, LS ;
SMOUSE, PE .
AMERICAN NATURALIST, 1994, 144 (03) :412-431
[60]  
NEWBY JE, 1984, SAHARA DESERT, P177