Territoriality and breeding behaviour of adult male Antarctic Fur seal, Arctocephalus gazella
Identifieur interne : 005F71 ( Istex/Curation ); précédent : 005F70; suivant : 005F72Territoriality and breeding behaviour of adult male Antarctic Fur seal, Arctocephalus gazella
Auteurs : T. S. MccannSource :
- Journal of Zoology [ 0952-8369 ] ; 1980-11.
Descripteurs français
- Wicri :
- topic : Taureau, Densité de population.
English descriptors
- KwdEn :
- Adult females, Adult males, Annual cycle, Antarctic, Antarctic convergence, Arctocephalus, Arctocephalus forsteri, Arctocephalus gazella, Arctocephalus pusillus, Bartholomew, Behaviour, Bird island, Body size, Boundary changes, Boundary display, Boundary display activity, Boundary displays, Brief bites, Bull, Copulate, Copulation, Copulation frequency, December, Dominant animal, Eared seals, Female gregariousness, Fight territory, First bulls, Former territory, Forsteri, Gazella, Gentry, High water mark, Individual bulls, Jubatus, Late december, Long periods, Major boundary changes, Male territoriality, Mating period, Neighbour, Neighbouring bulls, November, Oestrous cows, Other otariids, Other species, Particular reference, Peterson bartholomew, Phocarctos hookeri, Population density, Present study, Quantitative data, Range days, Reproductive consequences, Same territory, Sensu gentry, Shoreline territories, Social influences, Social organization, Stirling warneke, Study area, Study beach, Territorial boundaries, Territorial bull, Territorial bulls, Territorial males, Territoriality, Territory location, Territory size, Total number, Total time, Ursinus.
- Teeft :
- Adult females, Adult males, Annual cycle, Antarctic, Antarctic convergence, Arctocephalus, Arctocephalus forsteri, Arctocephalus gazella, Arctocephalus pusillus, Bartholomew, Behaviour, Bird island, Body size, Boundary changes, Boundary display, Boundary display activity, Boundary displays, Brief bites, Bull, Copulate, Copulation, Copulation frequency, December, Dominant animal, Eared seals, Female gregariousness, Fight territory, First bulls, Former territory, Forsteri, Gazella, Gentry, High water mark, Individual bulls, Jubatus, Late december, Long periods, Major boundary changes, Male territoriality, Mating period, Neighbour, Neighbouring bulls, November, Oestrous cows, Other otariids, Other species, Particular reference, Peterson bartholomew, Phocarctos hookeri, Population density, Present study, Quantitative data, Range days, Reproductive consequences, Same territory, Sensu gentry, Shoreline territories, Social influences, Social organization, Stirling warneke, Study area, Study beach, Territorial boundaries, Territorial bull, Territorial bulls, Territorial males, Territoriality, Territory location, Territory size, Total number, Total time, Ursinus.
Abstract
The social organization and behaviour of 35 individually recognizable territorial male Antarctic Fur seals (Arctocephalus guzellu), were studied during the breeding season at South Georgia. Adults of both sexes remain at sea throughout the winter. Among the first bulls ashore were those which had the longest territorial tenures. The mean period of tenure for 13 bulls seen to copulate was 34.3±9.0 days. New bulls continued to arrive and fight for territories on the breeding beach throughout the study period. Many were successful and mean territory size declined from about 60 m2 in mid‐November to 22 m3 in December. More than 3000 boundary displays between known bulls were recorded and analysed. These were largely ritualized although in 14% of displays bites were exchanged. Outright fighting was infrequent in relation to the total number of inter‐male encounters. 94% of of the fights occurred on the first day a pair of bulls became neighbours. Less than 50% of bulls holding territory were seen to copulate and the mean copulation frequency for these bulls was 10. During late December, by which time most females had mated, adult males ceased to maintain their territories actively and many abandoned them completely. Features of the social organization are compared with those of other otariid seals and the interrelationships between period of tenure, territory size, form of boundary display and copulation frequency are discussed in relation to environmental and social influences. Within fur seals and sea lions, differences in social organization during the breeding season do not seem to be related to phylogenetic differences.
Url:
DOI: 10.1111/j.1469-7998.1980.tb04235.x
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T. S. Mccann<affiliation><mods:affiliation>British Antarctic Survey, Natural Environment Research Council, Madingley Road, Cambridge</mods:affiliation><wicri:noCountry code="subField">Cambridge</wicri:noCountry></affiliation>Le document en format XML
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boundary changes</term><term>Male territoriality</term><term>Mating period</term><term>Neighbour</term><term>Neighbouring bulls</term><term>November</term><term>Oestrous cows</term><term>Other otariids</term><term>Other species</term><term>Particular reference</term><term>Peterson bartholomew</term><term>Phocarctos hookeri</term><term>Population density</term><term>Present study</term><term>Quantitative data</term><term>Range days</term><term>Reproductive consequences</term><term>Same territory</term><term>Sensu gentry</term><term>Shoreline territories</term><term>Social influences</term><term>Social organization</term><term>Stirling warneke</term><term>Study area</term><term>Study beach</term><term>Territorial boundaries</term><term>Territorial bull</term><term>Territorial bulls</term><term>Territorial males</term><term>Territoriality</term><term>Territory location</term><term>Territory size</term><term>Total number</term><term>Total time</term><term>Ursinus</term></keywords><keywords 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periods</term><term>Major boundary changes</term><term>Male territoriality</term><term>Mating period</term><term>Neighbour</term><term>Neighbouring bulls</term><term>November</term><term>Oestrous cows</term><term>Other otariids</term><term>Other species</term><term>Particular reference</term><term>Peterson bartholomew</term><term>Phocarctos hookeri</term><term>Population density</term><term>Present study</term><term>Quantitative data</term><term>Range days</term><term>Reproductive consequences</term><term>Same territory</term><term>Sensu gentry</term><term>Shoreline territories</term><term>Social influences</term><term>Social organization</term><term>Stirling warneke</term><term>Study area</term><term>Study beach</term><term>Territorial boundaries</term><term>Territorial bull</term><term>Territorial bulls</term><term>Territorial males</term><term>Territoriality</term><term>Territory location</term><term>Territory size</term><term>Total number</term><term>Total time</term><term>Ursinus</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Taureau</term><term>Densité de population</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The social organization and behaviour of 35 individually recognizable territorial male Antarctic Fur seals (Arctocephalus guzellu), were studied during the breeding season at South Georgia. Adults of both sexes remain at sea throughout the winter. Among the first bulls ashore were those which had the longest territorial tenures. The mean period of tenure for 13 bulls seen to copulate was 34.3±9.0 days. New bulls continued to arrive and fight for territories on the breeding beach throughout the study period. Many were successful and mean territory size declined from about 60 m2 in mid‐November to 22 m3 in December. More than 3000 boundary displays between known bulls were recorded and analysed. These were largely ritualized although in 14% of displays bites were exchanged. Outright fighting was infrequent in relation to the total number of inter‐male encounters. 94% of of the fights occurred on the first day a pair of bulls became neighbours. Less than 50% of bulls holding territory were seen to copulate and the mean copulation frequency for these bulls was 10. During late December, by which time most females had mated, adult males ceased to maintain their territories actively and many abandoned them completely. Features of the social organization are compared with those of other otariid seals and the interrelationships between period of tenure, territory size, form of boundary display and copulation frequency are discussed in relation to environmental and social influences. Within fur seals and sea lions, differences in social organization during the breeding season do not seem to be related to phylogenetic differences.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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