Article
 

Assessing the design and power of capture-recapture studies to estimate demographic parameters for the Endangered Oceania humpback whale population

Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/5712mb359

Descriptions

Attribute NameValues
Creator
Abstract
  • Capture-recapture studies offer a powerful tool to assess abundance, survival and population rate of change (λ). A previous capture-recapture study, based on DNA profiles, estimated that the IUCN-listed Endangered Oceania population of humpback whales had a superpopulation size of 4329 whales (95% confidence limits, CL: 3345, 5315) and λ = 1.03 (95% CL: 0.90-1.18) for the period 1999-2005. This low estimate of λ contrasts with the high estimated λ for the neighbouring east Australia population (1.11; 95% CL: 1.105-1.113). A future assessment of Oceania humpbacks through capture-recapture methodology has been proposed to meet 3 objectives: (1) estimate population size with a coefficient of variation of <20%, and detect if λ is significantly different from (2) 1.00 or (3) λ of east Australia. The proposed survey design involves using DNA profiles to identify whales on principal breeding grounds within Oceania in proportion to the abundance of whales on these grounds over the 10 to 12 wk wintering period, to minimise capture heterogeneity between individuals and to maximise capture probabilities. Simulations of the idealised survey design incorporating data from the previous surveys (1999-2005) with 3 new survey years were conducted under a range of scenarios for the ‘true’ demographic status of the population. Simulations of the entire Oceania region showed that the proposed design will give sufficient power to meet objectives (1) under all scenarios, (2) if the true λ ≥ 1.05 and (3) if the true λ ≤ 1.05. Region-specific simulations suggested there was scope to test for differences in recovery between principal breeding sites within Oceania.
  • This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Inter Research. The published article can be found at: http://www.int-res.com/journals/esr/esr-home/
  • Keywords: Heterogeneity, Capture–recapture, DNA profile, Megaptera novaeangliae
License
Resource Type
DOI
Date Available
Date Issued
Citation
  • Carroll, E. L., Brooks, L., Baker, C. S., Burns, D., Garrigue, C., Hauser, N., ... & Fewster, R. M. (2015). Assessing the design and power of capture− recapture studies to estimate demographic parameters for the Endangered Oceania humpback whale population. Endangered Species Research, 28, 147-162. doi:10.3354/esr00686
Journal Title
Journal Volume
  • 28
Declaração de direitos
Funding Statement (additional comments about funding)
  • We also thank the International Fund for Animal Welfare (IFAW) for supporting this assessment and the semi-annual meetings of the Consortium from which the framework for this power analysis originated. Funding for Open Access publication was provided by the University of St. Andrews.
Publisher
Peer Reviewed
Language
Replaces

Relações

Parents:

This work has no parents.

Itens

Miniatura Título Data de carga Acesso Ações
file details BakerCHMSCAssessingDesignPower.pdf 10/16/2017 Público
file details BakerCHMSCAssessingDesignPowerSupplement.pdf 10/16/2017 Público