scholarly journals A Case Study of Long-Term Separation and the Rejoining of an Adult Female in a Wild Troop of Japanese Macaques (Macaca fuscata) on Kinkazan Island

2016 ◽  
Vol 32 (2) ◽  
pp. 51-59
Author(s):  
Masaya TAMURA
Keyword(s):  
Adult Female ◽  
Macaca Fuscata ◽  
Japanese Macaques

scholarly journals Can hunting data be used to estimate unbiased population parameters? A case study on brown bears

2016 ◽  
Vol 12 (6) ◽  
pp. 20160197 ◽  
Author(s):  
Martin Leclerc ◽  
Joanie Van de Walle ◽  
Andreas Zedrosser ◽  
Jon E. Swenson ◽  
Fanie Pelletier
Keyword(s):  
Adult Female ◽  
Ursus Arctos ◽  
Temporal Trends ◽  
Legal Protection ◽  
Brown Bears ◽  
Adult Females ◽  
Fundamental Research ◽  
Management And Conservation

Quantifying temporal changes in harvested populations is critical for applied and fundamental research. Unbiased data are required to detect true changes in phenotypic distribution or population size. Because of the difficulty of collecting detailed individual data from wild populations, data from hunting records are often used. Hunting records, however, may not represent a random sample of a population. We aimed to detect and quantify potential bias in hunting records. We compared data from a long-term monitoring project with hunting records of brown bears ( Ursus arctos ) in Sweden and investigated temporal trends (1996–2013) in the ratio of yearlings to adult females, yearling mass and adult female mass. Data from hunting records underestimated the decline in yearling and adult female mass over time, most likely owing to the legal protection of family groups from hunting, but reflected changes in the ratio of yearlings to adult females more reliably. Although hunting data can be reliable to approximate population abundance in some circumstances, hunting data can represent a biased sample of a population and should be used with caution in management and conservation decisions.

Case study of a one-sided attack by multiple troop members on a nontroop adolescent male and the death of Japanese macaques (Macaca fuscata)

2009 ◽  
Vol 35 (4) ◽  
pp. 334-341 ◽  
Author(s):  
Masaki Shimada ◽  
Takeharu Uno ◽  
Naofumi Nakagawa ◽  
Shiho Fujita ◽  
Kosei Izawa
Keyword(s):  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Adolescent Male

Disability, Compensatory Behavior, and Innovation in Free-Ranging Adult Female Japanese Macaques (Macaca Fuscata)

2012 ◽  
Vol 74 (9) ◽  
pp. 788-803 ◽  
Author(s):  
SARAH E. TURNER ◽  
LINDA M. FEDIGAN ◽  
H. DAMON MATTHEWS ◽  
MASAYUKI NAKAMICHI
Keyword(s):  
Adult Female ◽  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Compensatory Behavior ◽  
Female Japanese Macaques ◽  
Free Ranging

Mutual Reciprocity of Grooming in Female Japanese Macaques (Macaca Fuscata)

Behaviour ◽  
1991 ◽  
Vol 119 (3-4) ◽  
pp. 161-170 ◽  
Author(s):  
Yasuyuki Muroyama
Keyword(s):  
Adult Female ◽  
Macaca Fuscata ◽  
Female Offspring ◽  
Japanese Macaques ◽  
The Other ◽  
Female Japanese Macaques

AbstractGrooming interactions among female Japanese macaques (Macaca fuscata) were observed and compared between affiliated and unaffilitated non-related pairs, mother and adult female offspring paris, and mother and immature offspring pairs. Unaffiliated (rarely interacting) members of pairs were likely to approach and then groom the other, in contrast to affiliated (frequently interacting) pairs, who more often approached and then solicited grooming from the other. The return receipt of a benefit just given, in the form of reciprocation of grooming, was immediate in non-related pairs. The brief interval between the occurrence of reciprocation facilitated the estimation of receiving as much benefit as was given in the case of rare grooming. However, such was not the case for related pairs. Adult female offspring solicited grooming from mothers more than immature offspring. The findings are discussed with reference to previous theories about the evolution of altruistic behaviour.

Unilateral auditory cortex ablation in macaques results in a contralateral hearing loss

1989 ◽  
Vol 62 (3) ◽  
pp. 789-801 ◽  
Author(s):  
H. E. Heffner ◽  
R. S. Heffner
Keyword(s):  
Hearing Loss ◽  
Auditory Cortex ◽  
Macaca Fuscata ◽  
Japanese Macaques ◽  
Broadband Noise ◽  
Large Shift ◽  
Before And After ◽  
Contralateral Ear ◽  
Auditory Field

1. The behavioral audiograms of four Japanese macaques (Macaca fuscata) were assessed before and after unilateral ablation of auditory cortex. The tones were presented via insertion earphones so that each ear could be tested separately. 2. Each animal had a hearing loss in the ear contralateral to the lesion, whereas the ipsilateral ear showed no change in sensitivity. The hearing loss initially appeared as a large shift in thresholds followed by rapid but incomplete recovery during the first 3-5 wk after surgery. The initial hearing loss ranged as high as 68 dB at some frequencies, although thresholds at other frequencies were occasionally unchanged. A threshold shift could be demonstrated with broadband noise as well as with tones. Although thresholds for some tones returned to normal within a few weeks, most were still elevated 16 wk after surgery when testing was discontinued. The largest long-term hearing losses occurred at frequencies from 4 to 25 kHz. 3. Analysis of the animals' psychophysical functions suggested that the hearing loss resembled a sensory deficit, as opposed to a nonsensory deficit in attention or vigilance. 4. Testing with binaural stimuli indicated that the hearing loss could best be described as a contralateral "ear" deficit, as opposed to a contralateral "auditory field" deficit. 5. It is suggested that a similar hearing loss occurs in humans after unilateral damage to auditory cortex.

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