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Accordingly, male Australian fur seals\n                    <jats:italic>Arctocephalus pusillus doriferus<\/jats:italic>\n                    and New Zealand fur seals\n                    <jats:italic>A. forsteri<\/jats:italic>\n                    that live in sympatry should exhibit partitioning in their broad niches (in habitat and trophic dimensions) in order to coexist. However, at the northern end of their distributions in Australia, both are recolonising their historic range after a long absence due to over-exploitation, and their small population sizes suggest competition should be weak and may allow overlap in niche space. We found some niche overlap, yet clear partitioning in diet trophic level (\u03b4\n                    <jats:sup>15<\/jats:sup>\n                    N values from vibrissae), spatial niche space (horizontal and vertical telemetry data) and circadian activity patterns (timing of dives) between males of each species, suggesting competition may remain an active driver of niche partitioning amongst individuals even in small, peripheral populations. Consistent with individual specialisation theory, broad niches of populations were associated with high levels of individual specialisation for both species, despite putative low competition. Specialists in isotopic space were not necessarily specialists in spatial niche space, further emphasising their diverse individual strategies for niche partitioning. Males of each species displayed distinct foraging modes, with Australian fur seals primarily benthic and New Zealand fur seals primarily epipelagic, though unexpectedly high individual specialisation for New Zealand fur seals might suggest marginal populations provide exceptions to the pattern generally observed amongst other fur seals.\n                  <\/jats:p>","DOI":"10.1007\/s00442-024-05537-8","type":"journal-article","created":{"date-parts":[[2024,4,3]],"date-time":"2024-04-03T06:02:07Z","timestamp":1712124127000},"page":"815-832","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Niche partitioning and individual specialisation in resources and space use of sympatric fur seals at their range margin"],"prefix":"10.1007","volume":"204","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5647-406X","authenticated-orcid":false,"given":"Marcus","family":"Salton","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincent","family":"Raoult","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian","family":"Jonsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert","family":"Harcourt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,4,3]]},"reference":[{"key":"5537_CR1","doi-asserted-by":"publisher","first-page":"1254","DOI":"10.1111\/mms.12718","volume":"36","author":"MJ Amador-Capitanachi","year":"2020","unstructured":"Amador-Capitanachi MJ, Moreno-S\u00e1nchez XG, Ventura-Dom\u00ednguez PD, Ju\u00e1rez-Ruiz A, Gonz\u00e1lez-Rodr\u00edguez E, G\u00e1lvez C, Norris T, Elorriaga-Verplancken FR (2020) Ecological implications of unprecedented warm water anomalies on interannual prey preferences and foraging areas of Guadalupe fur seals. 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