Evidence of inbreeding depression in the critically endangered parrot, the kakapo

2014 ◽  
Vol 18 (4) ◽  
pp. 341-347 ◽  
Author(s):  
K. L. White ◽  
D. K. Eason ◽  
I. G. Jamieson ◽  
B. C. Robertson
Keyword(s):  
Inbreeding Depression ◽  
Critically Endangered

Inbreeding depression in sperm quality in a critically endangered amphibian

Zoo Biology ◽  
2020 ◽  
Vol 39 (3) ◽  
pp. 197-204
Author(s):  
Kristin M. Hinkson ◽  
Sinlan Poo
Keyword(s):  
Inbreeding Depression ◽  
Sperm Quality ◽  
Critically Endangered

Inbreeding depression in a critically endangered carnivore

2016 ◽  
Vol 25 (14) ◽  
pp. 3309-3318 ◽  
Author(s):  
Karin Norén ◽  
Erika Godoy ◽  
Love Dalén ◽  
Tomas Meijer ◽  
Anders Angerbjörn
Keyword(s):  
Inbreeding Depression ◽  
Critically Endangered

Heterozygosity-Fitness Correlations and Inbreeding Depression in Two Critically Endangered Mammals

2012 ◽  
Vol 26 (6) ◽  
pp. 1121-1129 ◽  
Author(s):  
MarÍA JOSÉ Ruiz-López ◽  
Natalia Gañan ◽  
José Antonio Godoy ◽  
Ana Del Olmo ◽  
Julian Garde ◽  
...  
Keyword(s):  
Inbreeding Depression ◽  
Critically Endangered

scholarly journals Heterozygosity–Fitness Correlations Reveal Inbreeding Depression in Neonatal Body Size in a Critically Endangered Rock Iguana

2019 ◽  
Author(s):  
Jeanette B Moss ◽  
Glenn P Gerber ◽  
Mark E Welch
Keyword(s):  
Body Size ◽  
Inbreeding Depression ◽  
Genetic Load ◽  
Critically Endangered ◽  
First Year ◽  
Isolated Populations ◽  
Conditional Expression ◽  
Age Dependent ◽  
Endangered Population ◽  
Related Trait

Abstract Inbreeding depression, though challenging to identify in nature, may play an important role in regulating the dynamics of small and isolated populations. Conversely, greater expression of genetic load can enhance opportunities for natural selection. Conditional expression concentrates these opportunities for selection and may lead to failure of detection. This study investigates the possibility for age-dependent expression of inbreeding depression in a critically endangered population of rock iguanas, Cyclura nubila caymanensis. We employ heterozygote-fitness correlations to examine the contributions of individual genetic factors to body size, a fitness-related trait. Nonsignificant reductions in homozygosity (up to 7%) were detected between neonates and individuals surviving past their first year, which may reflect natural absorption of inbreeding effects by this small, fecund population. The majority of variation in neonate body size was attributed to maternal or environmental effects (i.e., clutch identity and incubation length); however, heterozygosity across 22 microsatellite loci also contributed significantly and positively to model predictions. Conversely, effects of heterozygosity on fitness were not detectable when adults were examined, suggesting that inbreeding depression in body size may be age dependent in this taxon. Overall, these findings emphasize the importance of taking holistic, cross-generational approaches to genetic monitoring of endangered populations.

Genetic Diversity and Structure of the Nile Soft-Shelled Turtle (Trionyx triunguis) Along the Mediterranean coast of Turkey

2020 ◽  
Vol 27 (6) ◽  
pp. 307-315
Author(s):  
Özgür Güçlü ◽  
Bülent Bozdoğan
Keyword(s):  
Microsatellite Loci ◽  
Geographic Distance ◽  
Iucn Red List ◽  
Genetic Variations ◽  
Mediterranean Coast ◽  
Critically Endangered ◽  
Mediterranean Populations ◽  
Genetic Diversity And Structure ◽  
Polymorphic Microsatellite ◽  
The Mediterranean

The Nile soft-shelled turtle (Trionyx triunguis) is distributed between Dalyan and Samandağ throughout the Mediterranean coast in Turkey. The Mediterranean subpopulation of the Nile soft-shelled turtle is listed as critically endangered in the IUCN Red List Categories. This investigation aimed to determinate levels of genetic variations and patterns of genetic structures among Mediterranean populations in Turkey by using T. triunguis-specific microsatellite primers. A total of 13 polymorphic microsatellite loci were studied among samples of 121 individuals collected from five populations in Turkey. Of 13 polymorphic microsatellite loci used, 3 new were identified in this study. The genetic differentiation among the 5 studied populations of T. triunguis was significant (p 0.001). The analysis of molecular variance (AMOVA) indicated that genetic variations occurred mainly within populations (89.7%) rather than among populations (10.3%). Structure analysis showed presence of two main groups among the Mediterranean T. triunguis populations. However genetic variations among populations were not correlated with geographic distance between the locations. Analysis of data showed that one of the populations (Dalyan) had undergone a bottleneck effect. Migration analysis indicates that T. triunguis migrates between five Mediterranean populations in Turkey. We concluded that based on our results the status of ‘critically endangered’ of T. triunguis should be maintained. Long term population genetic survey studies should be undertaken and changes in habitats of T. triunguis populations, as well as their population size and structure should be monitored for each population to be able to establish a clear strategy for protection of T. triunguis.

Population trends and migration patterns in the critically endangered Yellow-breasted Bunting (Emberiza aureola) in the Republic of Korea

2020 ◽  
Vol 27 (1) ◽  
pp. 56-63
Author(s):  
Jong-Gil Park ◽  
Chang-uk Park ◽  
Kyoung-Soon Jin ◽  
Yang-Mo Kim ◽  
Hee-Young Kim ◽  
...  
Keyword(s):  
Population Trends ◽  
Critically Endangered ◽  
Republic Of Korea ◽  
Migration Patterns ◽  
The Republic ◽  
And Migration
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