Survey of Dundas Island, Auckland Islands, with particular reference to Hooker's sea lion (<i>Phocarctos hookeri</i>)

Falla, Ricardo; Taylor, R. H.; Black, Colleen

doi:10.1080/03014223.1979.10428374

Cited by 13 publications

(17 citation statements)

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“…Females were always fewer than males, but seem to have increased from "less than 20" in 1947 (Bailey & Sorensen 1962) and 50 in 1979 (Falla et al 1979), to between 70 and 150 in 1997/88 (Moore & Moffat 1990). Male sea lions, particularly immature males, make up the majority of reported sightings.…”

Section: Historic Records Of Sea Lions At Campbell Islandmentioning

confidence: 99%

Distribution and breeding of New Zealand sea lionsPhocarctos hookeri onCampbell Island

McNally¹,

Heinrich²,

Childerhouse³

2001

New Zealand Journal of Zoology

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Campbell Island is the only major breeding site for the New Zealand sea lion Phocarctos hookeri outside the Auckland Islands. Minimum pup production was estimated at 78 for the 1997/98 breeding season, compared with the only previous estimate of 122 from 1991/92, and represents less than 5% of the total pup production for the species. Sea lions at Campbell Island have a widespread distribution, clumped at the coast and scattered inland. Local concentrations of sea lions were seen at Davis Point, Sandy Bay and both Northeast and Southeast Harbours. Isolated individuals were found up to 1.5 km inland and at altitudes up to 250 m. Breeding females at Campbell Island are generally solitary and give birth inland, in contrast to the highly gregarious colonies seen on the coasts of the Auckland Islands. In some years a small breeding colony forms on the coast, often at Davis point, but its location is variable. Overall, the present distribution and abundance of sea lions on Campbell Island does not appear to differ considerably from previous reports stretching back as far as the 1950s. Line transects proved inappropriate for estimating sea lion density, due to a low encounter rate and poor visibility in dense vegetation. Future work could include surveys for pups, which aggregate on the coast during March or April.

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Section: Historic Records Of Sea Lions At Campbell Islandmentioning

confidence: 99%

Distribution and breeding of New Zealand sea lionsPhocarctos hookeri onCampbell Island

McNally¹,

Heinrich²,

Childerhouse³

2001

New Zealand Journal of Zoology

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“…Falla made intermittent observations of sea lion behaviour at Sandy Bay over the period 1942-79 and reported that the breeding population of about 1000 animals, and production of about 350^100 pups per annum, was stable over this whole period (Falla 1965(Falla , 1975Falla et al 1979).…”

Section: Enderby Islandmentioning

confidence: 99%

Historical and modern distribution and abundance of the New Zealand sea lionPhocarctos hookeri

Childerhouse

Gales

1998

New Zealand Journal of Zoology

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This paper describes both the modern and the pristine distribution, breeding range, and relative abundance of the New Zealand sea lion (Phocarctos hookeri). Archaeological data and historical references were used to determine the pristine status of the sea lion, and its present status was determined from recent scientific studies and observations. The sea lion had a substantially more widespread distribution before the arrival of humans in New Zealand than it does today. The species used to range along the whole length of the coast, from

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“…It is important in seeking causes for extinction that all potential mechanisms are considered: it is not that long ago that predation was dismissed by the highest authorities as a cause of extinction of any bird species in New Zealand. We therefore discussed the factors that as appeared plausible, including the possible implications of the suggestion by Falla et al (1979) that trampling by the growing population of New Zealand sea lion (Phocarctos hookeri) eliminated the colony of South Georgian diving petrels on Dundas Island. Worthy rejects sea lions as a cause on the grounds that the species did not breed at Mason Bay, because no sea lion fossils have been found there.…”

Section: Responsementioning

confidence: 99%

Letter to the editor

Worthy¹,

Holdaway²,

Jones³

et al. 2004

Journal of the Royal Society of New Zealand

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Survey of Dundas Island, Auckland Islands, with particular reference to Hooker's sea lion (Phocarctos hookeri)

Cited by 13 publications

References 1 publication

Distribution and breeding of New Zealand sea lionsPhocarctos hookeri onCampbell Island

Distribution and breeding of New Zealand sea lionsPhocarctos hookeri onCampbell Island

Historical and modern distribution and abundance of the New Zealand sea lionPhocarctos hookeri

Letter to the editor

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