Long-term grooming partnerships between unrelated adult females in a free-ranging group of Japanese monkeys (Macaca fuscata)

2007 ◽  
Vol 69 (6) ◽  
pp. 652-663 ◽  
Author(s):  
M. Nakamichi ◽  
K. Yamada
Keyword(s):  
Macaca Fuscata ◽  
Japanese Monkeys ◽  
Adult Females ◽  
Free Ranging ◽  
Unrelated Adult

Continuity of Affiliative Relationships among Infants and Juveniles in a Free-Ranging Group of Japanese Monkeys (Macaca Fuscata)

1998 ◽  
Vol 82 (2) ◽  
pp. 691-700
Author(s):  
Yasuo Kojima
Keyword(s):  
Macaca Fuscata ◽  
Early Stage ◽  
First Year ◽  
Japanese Monkeys ◽  
Stage Of Development ◽  
Free Ranging ◽  
Selection Of

5 infants were observed during the first 13 mo. after birth in a free-ranging group of Japanese monkeys ( Macaco fuscata) to examine whether they maintained relatively frequent affiliative relationships with particular immature individuals. The number of immature affiliative partners rapidly increased from the first 3-mo. period after birth to the second 4-mo. period after birth, and the infants thereafter maintained affiliative relationships with particular individuals, mostly same-aged infants, at least in the second half of their first year. These findings show that infants were likely to interact with a larger number of different animals in the early stage of development, and thereafter selected particular individuals with whom they maintained affiliative relationships. The effects of sex on the selection of these long-term partners are also discussed.

Dominance relations among adult females in a free-ranging group of Japanese monkeys at Katsuyama

1995 ◽  
Vol 37 (3) ◽  
pp. 241-251 ◽  
Author(s):  
M. Nakamichi ◽  
N. Itoigawa ◽  
S. Imakawa ◽  
S. Machida
Keyword(s):  
Dominance Relations ◽  
Japanese Monkeys ◽  
Adult Females ◽  
Free Ranging

Long-term efficacy of levonorgestrel implants for fertility control of eastern grey kangaroos (Macropus giganteus)

2008 ◽  
Vol 35 (6) ◽  
pp. 520 ◽  
Author(s):  
Graeme Coulson ◽  
Christopher D. Nave ◽  
Geoff Shaw ◽  
Marilyn B. Renfree
Keyword(s):  
Urban Areas ◽  
Fertility Control ◽  
The Other ◽  
Control Group ◽  
Acceptable Alternative ◽  
Term Efficacy ◽  
Adult Females ◽  
Free Ranging ◽  
Over Time

Overabundant populations of kangaroos pose substantial management problems in small parks on the fringe of urban areas in Australia. Translocation is impractical and culling is often not publicly acceptable, but fertility control offers an acceptable alternative. One potential contraceptive is levonorgestrel, which provides effective long-term contraception in women, and prevents births in some marsupials for up to five years. We evaluated the long-term efficacy of levonorgestrel in free-ranging eastern grey kangaroos (M. giganteus) at two sites in Victoria, Australia. We trapped 25 adult females at one site (Portland Aluminium), treating 18 with two subcutaneous 70-mg levonorgestrel implants and seven with control (inert) implants. We darted 25 adult females at the other site (Woodlands Historic Park), treating all with two 70-mg levonorgestrel implants. We monitored the reproductive status of the kangaroos, as indicated by the obvious presence of a pouch young, in spring each year for up to seven years. In the first three years at Portland, 81–86% of levonorgestrel-treated females were infertile, compared with 12–29% in the control group, but the effectiveness of fertility control declined over time. At this site, the proportions of treated females breeding in the fourth, fifth, sixth and seventh years of the trial were 36%, 50%, 67% and 100% respectively. Fecundity at Woodlands was similar. Although this protocol achieved fertility control for several years, it was likely that more than one treatment or a higher dose rate would be required for effective fertility control in this long-lived species.

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