Differences between ecological niches in northern and southern populations of Angolan black and white colobus monkeys (Colobus angolensis palliatusandColobus angolensis sharpei) throughout Kenya and Tanzania

2019 ◽  
pp. e22975
Author(s):  
Monica M. McDonald ◽  
Scott M. Johnson ◽  
Edward R. Henry ◽  
Pamela M. K. Cunneyworth
Keyword(s):  
Ecological Niches ◽  
Black And White ◽  
Colobus Monkeys ◽  
Colobus Angolensis ◽  
Black And White Colobus

Feeding competition inferred from patch depletion in a supergroup of Rwenzori black-and-white colobus monkeys (Colobus angolensis ruwenzorii) in Rwanda

Behaviour ◽  
2020 ◽  
Vol 157 (8-9) ◽  
pp. 731-760
Author(s):  
Alex Miller ◽  
Debra S. Judge ◽  
Grace Uwingeneye ◽  
Dieudonne Ndayishimiye ◽  
Beth A. Kaplin ◽  
...  
Keyword(s):  
Scramble Competition ◽  
Feeding Competition ◽  
Intake Rate ◽  
Contest Competition ◽  
Black And White ◽  
Mature Leaves ◽  
Colobus Monkeys ◽  
Colobus Angolensis ◽  
Black And White Colobus ◽  
Patch Depletion

Abstract Competition for food is often a cost associated with living in a group, and can occur in an indirect (scramble) or direct (contest) form. We investigated feeding competition in a supergroup of Rwenzori black-and-white colobus monkeys (Colobus angolensis ruwenzorii) in Rwanda, with the aim of establishing whether freedom from scramble competition allows these monkeys to form supergroups. We used the patch depletion method, measuring intake rate coupled with movement rate, to assess if food patches become depleted over the occupancy period. Resource depletion was evident when the colobus fed on young leaves, but not when feeding on mature leaves. Scramble competition was inferred from a negative correlation between group size and change in intake rate over patch occupancy. Between-group contest competition was inferred from displacement from patches. Although feeding competition exists for select resources, limited competition for mature leaves may enable Rwenzori colobus to live in a supergroup of hundreds of individuals in this montane forest.

scholarly journals Intergroup variation in oestrogenic plant consumption by black‐and‐white colobus monkeys

2019 ◽  
Vol 57 (3) ◽  
pp. 429-436
Author(s):  
Kathryn M. Benavidez ◽  
Colin A. Chapman ◽  
Dale C. Leitman ◽  
Tara R. Harris ◽  
Michael D. Wasserman
Keyword(s):  
Black And White ◽  
Colobus Monkeys ◽  
Black And White Colobus

Diet and Use of Fallback Foods by Rwenzori Black-and-White Colobus (Colobus angolensis ruwenzorii) in Rwanda: Implications for Supergroup Formation

2020 ◽  
Vol 41 (3) ◽  
pp. 434-457
Author(s):  
Alex Miller ◽  
Debra Judge ◽  
Grace Uwingeneye ◽  
Dieudonne Ndayishimiye ◽  
Cyril C. Grueter
Keyword(s):  
Fallback Foods ◽  
Black And White ◽  
Colobus Angolensis ◽  
Black And White Colobus
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