Do Antarctic fish like it hot? What energy allocation can tell us about distribution shifts


Contact
Tina.Sandersfeld [ at ] awi.de

Abstract

Despite evidence for distribution shifts of single species and ecosystem changes as a reaction to global warming, little is known about the underlying processes. As a consequence of warming waters in the Southern Ocean, shifts in species distribution are expected with sub-Antarctic species migrating southward to high-Antarctic waters, while species from temperate regions might intrude sub-Antarctic areas. Species distribution and abundance are driven by reproduction and somatic growth, which in turn, depend upon surplus energy being available after baseline costs of maintenance have been met. However, the effects of environmental warming and energy budgets of single species have rarely been investigated. This study assesses the impact of temperature on energy budgets of Antarctic fish from different thermal habitats. Results show that increasing temperatures can enhance feeding efficiency and somatic growth. However, temperatures exceeding a species-specific threshold have detrimental effects on energy utilization and are likely to affect distribution patterns. In conclusion, energy budget studies are a crucial tool for understand species distribution limits and adaptations in response to a changing environment.



Item Type
Conference (Talk)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
11th International Congress on the Biology of Fish, 03 Aug 2014 - 07 Aug 2014, Edinburgh.
Eprint ID
39451
Cite as
Sandersfeld, T. , Davison, W. , Lamare, M. D. , Richter, C. and Knust, R. (2014): Do Antarctic fish like it hot? What energy allocation can tell us about distribution shifts , 11th International Congress on the Biology of Fish, Edinburgh, 3 August 2014 - 7 August 2014 .


Download
[img]
Preview
PDF
ICBF_abstract_2.pdf

Download (293kB) | Preview
Cite this document as:

Share

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item