scholarly journals Lifespan and Reproductive Senescence in a Free-Ranging Ring-Tailed Lemur (Lemur catta) Population at Berenty, Madagascar

2015 ◽  
Vol 86 (1-2) ◽  
pp. 134-139 ◽  
Author(s):  
Shinichiro Ichino ◽  
Takayo Soma ◽  
Naomi Miyamoto ◽  
Kaoru Chatani ◽  
Hiroki Sato ◽  
...  
Keyword(s):  
Lemur Catta ◽  
Reproductive Senescence ◽  
Free Ranging

Reproductive senescence in free-ranging North American elk Cervus elaphus Cervidae

Mammalia ◽  
2019 ◽  
Vol 83 (6) ◽  
pp. 593-600 ◽  
Author(s):  
Louis C. Bender ◽  
Jessica R. Piasecke
Keyword(s):  
Age Structure ◽  
Cervus Elaphus ◽  
North American ◽  
Reproductive Senescence ◽  
Female Age ◽  
North American Elk ◽  
Age Related ◽  
Consistent Manner ◽  
Multiple Species ◽  
Free Ranging

Abstract Successful production of calves is necessary for growth of North American elk (Cervus elaphus Linnaeus 1758) populations, but few studies have evaluated age-related effects on both the conception and survival of a calf to weaning in multiple free-ranging populations. Conception and survival of calves to weaning were both affected by maternal age, with old (age 9 and older) females showing reproductive senescence as compared to prime-aged (ages 2–8) females despite achieving similar or greater size and condition. Reproductive senescence in our free-ranging populations ultimately resulted in old females weaning fewer calves (0.42 calves/female) than did prime-aged females (0.64 calves/female). Other factors, especially maternal size, also influenced conception and survival to weaning, and these interacted with age in a consistent manner, i.e. larger females or females in better condition were more likely to conceive and successfully wean calves within each age class. Female age structure receives less consideration in ungulate management than does male age structure, despite demonstrated impacts on population productivity of multiple species because of reproductive senescence. Because of the large proportion of individuals in senesced age classes in elk populations, low productivity in populations may simply reflect female age structure, rather than other frequently hypothesized factors.

The effects of environmental and visitor variables on the behavior of free-ranging ring-tailed lemurs (Lemur catta) in captivity

Zoo Biology ◽  
2017 ◽  
Vol 36 (4) ◽  
pp. 250-260 ◽  
Author(s):  
Courtney Collins ◽  
Ilse Corkery ◽  
Amy Haigh ◽  
Sean McKeown ◽  
Thomas Quirke ◽  
...  
Keyword(s):  
Lemur Catta ◽  
In Captivity ◽  
Free Ranging

BIOMEDICAL EVALUATION OF FREE-RANGING RING-TAILED LEMURS (LEMUR CATTA) IN THREE HABITATS AT THE BEZA MAHAFALY SPECIAL RESERVE, MADAGASCAR

2007 ◽  
Vol 38 (2) ◽  
pp. 201-216 ◽  
Author(s):  
David S. Miller ◽  
Michelle L. Sauther ◽  
Mandala Hunter-Ishikawa ◽  
Krista Fish ◽  
Heather Culbertson ◽  
...  
Keyword(s):  
Lemur Catta ◽  
Free Ranging ◽  
Beza Mahafaly Special Reserve
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