scholarly journals Incisor tooth wear and age determination in mountain gorillas from Volcanoes National Park, Rwanda

2018 ◽  
Vol 167 (4) ◽  
pp. 930-935 ◽  
Author(s):  
Jordi Galbany ◽  
Thadée Muhire ◽  
Veronica Vecellio ◽  
Antoine Mudakikwa ◽  
Aisha Nyiramana ◽  
...  
Keyword(s):  
National Park ◽  
Age Determination ◽  
Tooth Wear ◽  
Incisor Tooth ◽  
Mountain Gorillas

scholarly journals Age determination in Cape Mountain Zebras Equus Zebra Zebra in the Mountain Zebra National Park

Koedoe ◽  
1982 ◽  
Vol 25 (1) ◽  
Author(s):  
B. L Penzhorn
Keyword(s):  
Age Estimation ◽  
National Park ◽  
Age Determination ◽  
Tooth Wear ◽  
Tooth Eruption ◽  
Determination Method ◽  
Age Classes

The sizes of foals up to two years old can be used for age estimation in the field. Tooth eruption and replacement, which is similar to Hartmann and plains zebras, can be used for age estimation up to four years. No age classes based on tooth wear could be defined, due to the paucity of material. Infundibula in the incisors are retained to a greater age than in Hartmann or plains zebras. Cementum layer counts offer a reliable age determination method, at least up to 15 years.

Tooth wear and feeding ecology in mountain gorillas from Volcanoes National Park, Rwanda

2015 ◽  
Vol 159 (3) ◽  
pp. 457-465 ◽  
Author(s):  
Jordi Galbany ◽  
Olive Imanizabayo ◽  
Alejandro Romero ◽  
Veronica Vecellio ◽  
Halszka Glowacka ◽  
...  
Keyword(s):  
Feeding Ecology ◽  
National Park ◽  
Tooth Wear ◽  
Mountain Gorillas

Virunga Gorillas – the Case Against Translocations

Oryx ◽  
1977 ◽  
Vol 13 (5) ◽  
pp. 469-472 ◽  
Author(s):  
A. H. Harcourt
Keyword(s):  
National Park ◽  
Careful Consideration ◽  
Mountain Gorillas

Only about 300 mountain gorillas survive in the Virunga Volcanoes of Zaire and Rwanda. In the last Oryx Dr John MacKinnon suggested that a transfer of animals from the Kahuzi-Biega National Park to introduce new blood to the Virunga population should be considered. The author of this article, who spent two years intheVirungaswith Dian Fossey studying the gorillas, points out first that we do not yet know whether the animals are, in fact, suffering from inbreeding, and suggests why they may not be so; and second that there are special difficulties about the transfer that make death of the released animals and disruption of the population the most likely results at present. Dr MacKinnon, who has read the article, agrees that there are many dangers in translocation and that it should not be done without careful consideration and expert supervision.

Wear and microwear on the teeth of a moose (Alces alces) population in Manitoba, Canada

1986 ◽  
Vol 64 (11) ◽  
pp. 2467-2479 ◽  
Author(s):  
William G. Young ◽  
Therese M. Marty
Keyword(s):  
Tooth Loss ◽  
Microscopic Analysis ◽  
Tooth Wear ◽  
Incisor Tooth ◽  
Electron Microscopic ◽  
Tooth Structure ◽  
Microwear Analysis ◽  
Anterior Teeth ◽  
Scanning Electron Microscopic ◽  
Scanning Electron Microscopic Analysis

A group of wild moose from Manitoba, Canada, were documented as having excessive tooth wear. Replicas of one incisor tooth were collected from 16 individuals and from 19 controls for comparison by volumetric and scanning electron microscopic analysis. All animals were aged from tooth cementum lines. Tooth replicas were cast from silicone rubber impressions in epoxy resin and sputter coated with gold. Tooth wear with age was compared statistically by measuring crown height, percent tooth loss, interfacet distance, and facet area on the incisors. The unique pattern of wear on the anterior teeth of affected moose was described. In affected animals, crown heights were significantly reduced and percent tooth loss was excessive. Microwear analysis found that an abrasive agent, acting predominantly in a lingual to labial direction, had been responsible for loss of enamel and dentine incisally and interproximally, and on the facial and lingual surfaces to a lesser extent. Interdental facets became involved by vertical abrasion. Control teeth showed fewer but coarser scratches and only approached the pattern of wear found in affected moose in a few individuals in old age. The loss of tooth structure would lead to diminished cropping efficiency and damage to the periodontium.

scholarly journals Squeezing Out the Mountain Gorilla

Oryx ◽  
1973 ◽  
Vol 12 (2) ◽  
pp. 207-215 ◽  
Author(s):  
A. F. G. Groom
Keyword(s):  
National Park ◽  
Mountain Gorilla ◽  
Entire Area ◽  
Mountain Gorillas ◽  
Human Interference ◽  
Game Reserve ◽  
The Law

The author's 1972 census, following one the previous year, of the mountain gorillas in the Virunga Volcanoes, which straddle the Zaire–Rwanda–Uganda borders, shows a small but still declining population. All the signs, including the behaviour of the gorillas, one of which fled screaming at the sight of one of the observers, suggests that the decline is due largely to human interference. As the entire area has national park or game reserve status the urgent need is to enforce the law.

Incisor Tooth Wear in the Sea Otter

1954 ◽  
Vol 35 (4) ◽  
pp. 595 ◽  
Author(s):  
Milton Hildebrand
Keyword(s):  
Tooth Wear ◽  
Sea Otter ◽  
Incisor Tooth

Dietary Variability of Mountain Gorillas in Bwindi Impenetrable National Park, Uganda

2004 ◽  
Vol 25 (5) ◽  
pp. 1043-1072 ◽  
Author(s):  
Jessica Ganas ◽  
Martha M. Robbins ◽  
John Boscoe Nkurunungi ◽  
Beth A. Kaplin ◽  
Alastair McNeilage
Keyword(s):  
National Park ◽  
Mountain Gorillas ◽  
Dietary Variability ◽  
Bwindi Impenetrable National Park

Daily defecation outputs of mountain gorillas (Gorilla beringei beringei) in the Volcanoes National Park, Rwanda

Primates ◽  
2020 ◽  
Author(s):  
Elie Sinayitutse ◽  
David Modry ◽  
Jan Slapeta ◽  
Aisha Nyiramana ◽  
Antoine Mudakikwa ◽  
...  
Keyword(s):  
National Park ◽  
Mountain Gorillas ◽  
Gorilla Beringei Beringei ◽  
Gorilla Beringei
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