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Group encounters and territoriality in wild Alaotran gentle lemurs ( Hapalemur griseus alaotrensis )
Author(s) -
Nievergelt Caroline M.,
Mutschler Thomas,
Feistner Anna T. C.
Publication year - 1998
Publication title -
american journal of primatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.988
H-Index - 81
eISSN - 1098-2345
pISSN - 0275-2565
DOI - 10.1002/(sici)1098-2345(1998)46:3<251::aid-ajp5>3.0.co;2-h
Subject(s) - lemur , territoriality , home range , context (archaeology) , intrusion , geography , ecology , zoology , primate , biology , habitat , archaeology , geochemistry , geology
During a 3 month field study, 18 group encounters between four groups of Alaotran gentle lemurs ( Hapalemur griseus alaotrensis ) were observed in the Lake Alaotra marshland in Madagascar. Behaviors observed during group encounters are described, and quantitative data on intergroup interactions and ranging patterns are discussed in the context of territoriality. Intergroup interactions varied in their intensity, ranging from visual monitoring, scent marking, and display locomotion to penetrating the neighboring range. A quarter (27%) of the encounters were aggressive, involving chases and confrontation displays, and no affiliative interactions were observed. Both adult males and females were involved in intergroup encounters, with males playing more active roles. All encounters took place in the small overlapping areas of neighboring home ranges. The outcome of an aggressive encounter was determined by its location, with the resident group always driving out the intruding one. The Alaotran gentle lemur actively advertised and consistently defended a large area of its home range against intrusion of neighboring groups and can therefore be considered territorial. Am. J. Primatol. 46:251–258, 1998. © 1998 Wiley‐Liss, Inc.