scholarly journals Evaluating extinction debt in fragmented forests: the rapid recovery of a critically endangered primate

2020 ◽  
Author(s):  
M. Alcocer‐Rodríguez ◽  
V. Arroyo‐Rodríguez ◽  
C. Galán‐Acedo ◽  
J. Cristóbal‐Azkarate ◽  
N. Asensio ◽  
...  
Keyword(s):  
Critically Endangered ◽  
Rapid Recovery ◽  
Extinction Debt ◽  
Fragmented Forests

scholarly journals First use of artificial canopy bridge by the world’s most critically endangered primate the Hainan gibbon Nomascus hainanus

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Bosco Pui Lok Chan ◽  
Yik Fui Philip Lo ◽  
Xiao-Jiang Hong ◽  
Chi Fung Mak ◽  
Ziyu Ma
Keyword(s):  
Habitat Loss ◽  
Extinction Risk ◽  
Camera Trap ◽  
Critically Endangered ◽  
Short Term ◽  
Usage Frequency ◽  
Forest Corridors ◽  
Conservation Actions ◽  
Fragmented Forests ◽  
Hainan Gibbon

Abstract All gibbon species (Primates: Hylobatidae) are facing high extinction risk due to habitat loss and hunting. The Hainan gibbon Nomascus hainanus is the world’s most critically endangered primate, and one of the priority conservation actions identified is to establish artificial canopy corridors to reconnect fragmented forests. The effectiveness of artificial canopy bridge as a conservation tool for wild gibbons has not been widely tested, and the results are rarely published. We constructed the first canopy bridge for Hainan gibbon in 2015 to facilitate passage at a natural landslide; mountaineering-grade ropes were tied to sturdy trees with the help of professional tree climbers and a camera trap was installed to monitor wildlife usage. Hainan gibbon started using the rope bridge after 176 days, and usage frequency increased with time. All members in the gibbon group crossed the 15.8 m rope bridge except adult male. Climbing was the predominant locomotor mode followed by brachiation. This study highlights the use and value of rope bridges to connect forest gaps for wild gibbons living in fragmented forests. While restoring natural forest corridors should be a priority conservation intervention, artificial canopy bridges may be a useful short-term solution.

Effective population size of the critically endangered east Australian grey nurse shark Carcharias taurus

2019 ◽  
Vol 610 ◽  
pp. 137-148 ◽  
Author(s):  
S Reid-Anderson ◽  
K Bilgmann ◽  
A Stow
Keyword(s):  
Population Size ◽  
Effective Population Size ◽  
Critically Endangered ◽  
Effective Population ◽  
Nurse Shark ◽  
Carcharias Taurus

Short Note: Habitat Characteristics of the Critically Endangered Taiwanese Humpback Dolphins (Sousa chinensis) of the Eastern Taiwan Strait

2014 ◽  
Vol 40 (4) ◽  
pp. 368-374 ◽  
Author(s):  
Lauren E. Dares ◽  
Jordan M. Hoffman ◽  
Shih Chu Yang ◽  
John Y. Wang
Keyword(s):  
Short Note ◽  
Taiwan Strait ◽  
Habitat Characteristics ◽  
Critically Endangered ◽  
Sousa Chinensis

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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