Historical and modern distribution and abundance of the New Zealand sea lion Phocarctos hookeri

@article{Childerhouse1998HistoricalAM,
  title={Historical and modern distribution and abundance of the New Zealand sea lion Phocarctos hookeri},
  author={Simon J. Childerhouse and Nicholas J. Gales},
  journal={New Zealand Journal of Zoology},
  year={1998},
  volume={25},
  pages={1-16}
}
Abstract 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 Archaeological data and historical references were used to determine the pristine status of the sea lion, and its present status was determined from recent scientific studies and observations.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… Expand
Distribution and breeding of New Zealand sea lions Phocarctos hookeri on Campbell Island
TLDR
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, and line transects proved inappropriate for estimating sea lion density. Expand
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TLDR
The abundance of the New Zealand sea lion, Phocarctos hookeri, was estimated using a model that incorporated estimated pup production and is among the smallest reported for a species within the Otariidae. Expand
Historical population size of the threatened New Zealand sea lion Phocarctos hookeri
Marine mammal species were exploited worldwide during periods of commercial sealing in the 18th and 19th centuries. For many of these species, an estimate of the pre-exploitation abundance of theExpand
A Northward Spread In The Breeding Distribution Of The New Zealand Sea Lion (Phocartos Hooeri)
TLDR
It is concluded that the initiation of breeding by P. hookeri at Otago has been a serendipitous event attributable to atypical behaviour by a single female. Expand
New Zealand sea lion, Phocarctos hookeri, pup production—1995 to 2006
Abstract The New Zealand sea lion (NZ sea lion), Phocarctos hookeri, is New Zealand's only endemic pinniped. Classified as vulnerable, it is one of the world's rarest pinnipeds. During the 1994/95Expand
Diet of New Zealand sea lions (Phocarctos hookeri) at their southern breeding limits
TLDR
It is hypothesised that the key prey identified here provides a highly available food source for the growing population of NZ sea lions at Campbell Island, and may be one of the main causes of an increase in NZ sea lion population size at Campbell island in contrast to a decrease at the Auckland Islands. Expand
Philopatry and site fidelity of New Zealand sea lions (Phocarctos hookeri)
The New Zealand sea lion (NZ sea lion), Phocarctos hookeri, is New Zealand’s only endemic pinniped, and one of the worlds rarest otariids. It is classified as ‘Threatened’ based primarily on the lowExpand
The population decline of the New Zealand sea lion Phocarctos hookeri: a review of possible causes
TLDR
The most plausible hypotheses, based on available evidence, are that the observed decline, in particular, the decreasing number of breeding females in the Auckland Island population, is caused by fisheries-induced resource competition and fisheries-related by-catch. Expand
New Zealand sea lion abundance, demographics and movements in southern New Zealand
This study represents the first comprehensive survey of the New Zealand sea lion, Phocarctos hookeri populations at Campbell Island, the first surveys in nearly 30 years at The Snares and theExpand
New Zealand sea lions Phocarctos hookeri and squid trawl fisheries: bycatch problems and management options
The New Zealand (NZ) sea lion Phocarctos hookeri is one of the world's most rare and highly localized pinnipeds. NZ sea lions only breed on New Zealand's subantarctic islands, with 86% of breedingExpand
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The abundance of the New Zealand sea lion, Phocarctos hookeri, was estimated using a model that incorporated estimated pup production and is among the smallest reported for a species within the Otariidae. Expand
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TLDR
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TLDR
The results suggest that incidental mortalities of Hooker's sea lions in the trawl fishery for arrow squid should be minimized if a population decline is to be avoided. Expand
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Eighty-eight surveys for sea lions at 21 locations from Katiki (45"24' S) to Waipati (46"37' S) were carried out between 1984 and 1992. Four of the 28 animals seen were females, the ftrStreportExpand
Haul-out patterns, site fidelity and activity budgets of male Hooker's sea lions (Phocarctos hookeri) on the New Zealand mainland
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Diurnal and seasonal haul-out patterns, site fidelity and activity budgets of individually identified Hooker's sea lions were studied for two years at Papanui Beach, Otago Peninsula, New Zealand; there were significant differences in the frequencies of behavioral activities between summer and winter. Expand
Observations of Hooker's sea lion, Phocarctos hookeri, at a hauling ground on Otago Peninsula, New Zealand
Abstract Observations made between January 1984 and December 1985 show that Phocarctos hookeri (Gray, 1844) has a fluctuating presence at Papanui Beach (45°52S, 170°44'E), Otago Peninsula, with lowExpand
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