Article
 

Anthropogenic Harvesting Pressure and Changes in Life History: Insights from a Rocky Intertidal Limpet

Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/76537228w

Descriptions

Attribute NameValues
Creator
Abstract
  • The importance of large breeding individuals for maintaining the health of marine fish and invertebrate populations has long been recognized. Unfortunately, decades of human harvesting that preferentially remove larger individuals have led to drastic reductions in body sizes of many of these species. Such size-selective harvesting is particularly worrisome for sequentially hermaphroditic species where the larger size classes are composed primarily of one sex. Whether these species can maintain stable sex ratios under sustained harvesting pressure depends on the level of plasticity of their life-history traits. Here, we show that populations of a marine limpet (Lottia gigantea) can adjust a fundamental aspect of their life history (the timing of sex change) when subjected to size-selective harvesting. As predicted by theoretical models, individuals from harvested populations change sex at smaller sizes and grow at slower rates compared to individuals from protected populations. In addition, the relative size at which the change from male to female occurs remains constant (similar to 0.75; size at sex change/maximum size) across populations, regardless of harvesting pressure. Our results show that population-level demographic and life-history data, in conjunction with existing theory, can be sufficient to predict the responses of sequential hermaphrodites to harvesting pressure. Furthermore, they suggest such species can potentially adapt to size-selective harvesting.
  • This is the publisher’s final pdf. The published article is copyrighted by University of Chicago and can be found at: http://www.press.uchicago.edu/journals.html.
  • Keywords: Age, Sex change, Animals, Population structure, Growth, Body size, Fish, Southern California, Owl limpet, Lottia giganteal
Resource Type
DOI
Date Available
Date Issued
Citation
  • Fenberg, P. B., Associate Editor: Michael G. Neubert, Editor: Judith L. Bronstein, & Roy, K. (2012). Anthropogenic harvesting pressure and changes in life history: Insights from a rocky intertidal limpet. The American Naturalist, 180(2), 200-210. doi: 10.1086/666613
Journal Title
Journal Volume
  • 180
Journal Issue/Number
  • 2
Academic Affiliation
Declaração de direitos
Funding Statement (additional comments about funding)
  • This work was supported by a grant from a National Oceanic and Atmospheric Administration–California Sea Grant (to K.R.) and an EPA Science to Achieve Results (STAR) Fellowship to P.B.F.
Publisher
Peer Reviewed
Language
Replaces

Relações

Parents:

This work has no parents.

Itens

Miniatura Título Data de carga Acesso Ações
file details FenbergPhillipBZoologyAnthropogenicHarvestingPressure.pdf 2017-07-17 Público Baixar