A5033888624- Marine animal studies overview
- Avian ecology and behavior
- Turtle Biology and Conservation
- Cephalopods and Marine Biology
- Marine and fisheries research
- Ichthyology and Marine Biology
- Bat Biology and Ecology Studies
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
- Human-Animal Interaction Studies
- Fish Ecology and Management Studies
- Oil Spill Detection and Mitigation
- Coral and Marine Ecosystems Studies
- Animal Vocal Communication and Behavior
- Aquaculture disease management and microbiota
- Bird parasitology and diseases
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Animal Behavior and Reproduction
- Genetic diversity and population structure
- Economic and Environmental Valuation
- Wildlife Conservation and Criminology Analyses
- Marine and coastal plant biology
- Animal Behavior and Welfare Studies
- Parasite Biology and Host Interactions
Massey University
2015-2024
Palmerston North Hospital
2019
Department of Conservation
2008-2017
Allan Wilson Centre
2015-2016
University of Lausanne
2016
University of Otago
2009-2016
SIB Swiss Institute of Bioinformatics
2016
Aquatic Systems (United States)
2010
University of Canterbury
2005-2008
Bath Spa University
2006
Human activities can affect the behaviour of mammals through modification habitats, changes in predation pressure or alterations food distribution and availability. We analysed association ranging patterns 242 individually identified bottlenose dolphins (Tursiops aduncus) eastern Moreton Bay, Queensland, Australia, distinguished two separate communities dolphins. Unlike elsewhere, communities' core areas overlapped substantially. There was a correlation between dolphins' responses to fishing...
Abstract A central paradigm in conservation biology is that population bottlenecks reduce genetic diversity and viability. In an era of biodiversity loss climate change, understanding the determinants consequences therefore important challenge. However, as most studies focus on single species, multitude potential drivers remain elusive. Here, we combined data from over 11,000 individuals 30 pinniped species with demographic, ecological life history to evaluate commercial exploitation by 18th...
Extinctions can dramatically reshape biological communities. As a case in point, ancient mass extinction events apparently facilitated dramatic new evolutionary radiations of surviving lineages. However, scientists have yet to fully understand the consequences more recent upheaval, such as megafaunal extinctions that occurred globally over past 50 kyr. New Zealand was world's last large landmass be colonized by humans, and its exceptional archaeological record documents vast number...
Abstract The conservation status of New Zealand (NZ) marine mammals (suborders Cetacea and Pinnipedia) is reappraised using the 2008 version NZ Threat Classification System. list comprises 56 taxa (named species or subspecies, as yet unnamed forms types) in following categories: Threatened—eight (five Nationally Critical three Endangered); Vagrant—six taxa; Migrant—20 Data Deficient—13 taxa. A further nine are listed Not Threatened. Relative to previous listing, threat two worsened: sea lion...
ESR Endangered Species Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 5:193-204 (2008) - DOI: https://doi.org/10.3354/esr00086 New Zealand sea lions Phocarctos hookeri and squid trawl fisheries: bycatch problems management options B. Louise Chilvers* Marine Conservation Unit, Department of Conservation, PO Box 10420, Wellington 6143, *Email: lchilvers@doc.govt.nz ABSTRACT: The (NZ) lion...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 304:235-247 (2005) - doi:10.3354/meps304235 Summer foraging areas for lactating New Zealand sea lions Phocarctos hookeri B. Louise Chilvers1,4,*, Ian S. Wilkinson1,2, Padraig J. Duignan3, Neil Gemmell4 1Science and Research Unit, Department of Conservation, PO Box 10-420, Wellington, 214 Carlisle St,...
As part of a health survey New Zealand sea lions (Phocarctos hookeri) on Enderby Island, Auckland Islands (50°30′S, 166°17′E), neonatal mortality was closely monitored at the Sandy Bay colony for seven consecutive years. Throughout breeding seasons 1998–99 to 2004–05, more than 400 postmortem examinations were performed pups found dead this site. The primary causes death categorized as trauma (35%), bacterial infections (24%), hookworm infection (13%), starvation and stillbirth (4%). For...
Abstract When studying diving behaviour, it is important to know whether a species operating at or close its maximum physiological capacity, because if is, will be less capable of compensating for normal environmental human‐induced fluctuations in environment. New Zealand (NZ) sea lions Phocarctos hookeri are among the world's rarest pinnipeds with restricted distribution and abundance most southerly limit their known range, NZ's sub‐Antarctic. Female NZ deepest longest otariids, foraging...
The New Zealand sea lion (NZ lion), Phocarctos hookeri, is Zealand’s only endemic pinniped, and one of the worlds rarest otariids. It classified as ‘Threatened’ based primarily on low number breeding sites restricted distribution. In Zealand, a species listed ‘threatened’ required to be managed allow its recovery removal from list within 20 years. For NZ lions this dependant establishment new areas. However, understanding recolonisation processes for pinnipeds still in infancy with factors...
We used quantitative fatty acid signature analysis (QFASA) to predict the long-term diet of New Zealand (NZ) sea lions (Phocarctos hookeri) incidentally caught in NZ arrow squid (Nototodarus spp.) fishery. The QFASA model (FA) profiles based on 82 blubber samples bycaught between 2000 and 2006. First, was optimized by a series simulations for which 1 parameter—6 different sets calibration coefficients (CCs) from pinniped species feeding regime, 2 FAs, consideration individual prey values, or...
Sexual aggression by male pinnipeds during breeding can lead to female injury and death, affecting reproductive success, fecundity, increasing the cost of mating for females. Thus, females that employ strategies minimize probability being injured will be at an advantage. Here we investigate extent injuries number deaths attributed harassment, test hypothesis whether arrival departure behaviour New Zealand sea lions (Phocarctos hookeri (Gray, 1844); NZSL) Sandy Bay, Enderby Island, Auckland...
Abstract The New Zealand sea lion (NZ lion), Phocarctos hookeri, is Zealand's only endemic pinniped. Classified as vulnerable, it one of the world's rarest pinnipeds. During 1994/95 austral summer, a long‐term population‐monitoring programme Auckland Island colonies was initiated using standard procedures to estimate annual pup production. This paper reports production estimates for known NZ population over last 12 years (1994/95 2005/06), and variation in Islands. sixty‐four percent entire...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 378:299-308 (2009) - DOI: https://doi.org/10.3354/meps07846 Diverse foraging strategies in lactating New Zealand sea lions B. Louise Chilvers1,*, Ian S. Wilkinson1,2 1Marine Conservation Unit, Department of Conservation, PO Box 10420, Wellington 6143, 2Department Environment and Locked Bag 914, Coffs Harbour,...
Abstract Ecologists often describe the foraging ecology of a species as whole, treating conspecific individuals ecologically equal. However, individual specialization has potentially important ecological, evolutionary and conservation implications. Foraging studies are usually based on behaviours sampled in only 1 year. In this study, site fidelity locations nine female New Zealand sea lions (NZ Phocarctos hookeri ) from Enderby Island, Auckland Islands, were investigated by repeating their...
Sexual segregation (sex differences in spatial organisation and resource use) is observed a large range of taxa. Investigating causes for sexual vital understanding population dynamics has important conservation implications, as sex foraging ecology may affect vulnerability to area-specific human activities. Although behavioural ecologists have proposed numerous hypotheses this phenomenon, the underlying are poorly understood. We examined size-dimorphism niche divergence potential...
Context Locating cryptic animals is an important aspect of many wildlife management programs and research studies. However, this process can be inefficient, time-consuming expensive. Unmanned aerial vehicles (UAVs), unmanned aircraft systems (UASs) or drones fitted with a camera are increasingly being used for counting monitoring wildlife; however, these often not suitable species. Very high-frequency (VHF) radio-tracking commonplace; single-channel VHF receivers mean that must tracked...