Journal article
Ontogenetic and sex-specific differences in density-dependent habitat selection of a marine fish population
Ecology, Vol.92(1), pp.189-200
01/2011
DOI: 10.1890/09-1129.1
PMID: 21560689
Abstract
The spatial dynamics of species are the result of complex interactions between density-independent and density-dependent sources of variability. Disentangling these two sources of variability has challenged ecologists working in both terrestrial and aquatic ecosystems. Using a novel spatially explicit statistical model, we tested for the presence of density-independent and density-dependent habitat selection in yellowfin sole ( Limanda aspera ) in the eastern Bering Sea. We found specificities in the density-dependent processes operating across ontogeny and particularly with gender. Density-dependent habitat expansion occurred primarily in females, and to a lesser degree in males. These patterns were especially evident in adult stages, while juvenile stages of both sexes exhibited a mix of different dynamics. Association of yellowfin sole with substrate type also varied by sex and to a lesser degree with size, with large females distributed over a wider range of substrates than males. Moreover, yellowfin sole expanded northward as cold subsurface waters retracted in summer, suggesting high sensitivity to arctic warming. Our findings illustrate how marginal habitats can play an important role in buffering density-dependent habitat expansion, with direct implications for resource management. Our spatially explicit modeling approach is effective in evaluating density-dependent spatial dynamics, and can easily be used to test similar hypotheses from a variety of aquatic and terrestrial ecosystems.
Details
- Title: Subtitle
- Ontogenetic and sex-specific differences in density-dependent habitat selection of a marine fish population
- Creators
- Valerio Bartolino - College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331 USALorenzo Ciannelli - College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331 USANathan M Bacheler - College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331 USAKung-Sik Chan - Department of Statistics and Actuarial Science, University of Iowa, Iowa City, Iowa 52242 USA
- Resource Type
- Journal article
- Publication Details
- Ecology, Vol.92(1), pp.189-200
- Publisher
- Ecological Society of America
- DOI
- 10.1890/09-1129.1
- PMID
- 21560689
- ISSN
- 0012-9658
- eISSN
- 1939-9170
- Number of pages
- 12
- Alternative title
- DENSITY-DEPENDENT HABITAT SELECTION
- Language
- English
- Date published
- 01/2011
- Academic Unit
- Statistics and Actuarial Science; Radiology
- Record Identifier
- 9983985976702771
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