eCite Digital Repository
Impact of fishing on size composition and diversity of demersal fish communities
Citation
Bianchi, G and Gislason, H and Graham, K and Hill, L and Jin, X and Koranteng, K and Manickchand-Heileman, S and Paya, I and Sainsbury, K and Sanchez, F and Zwanenburg, K, Impact of fishing on size composition and diversity of demersal fish communities, ICES Journal of Marine Science, 57, (2000) pp. 558-571. ISSN 1095-9289 (2000) [Refereed Article]
![]() | PDF Not available 195Kb |
Copyright Statement
The definitive publisher-authenticated version is available online at: http://www.oxfordjournals.org/
DOI: doi:10.1006/jmsc.2000.0727
Abstract
By analysing data sets from different world regions we add evidence to documented
changes in demersal fish community structure that may be related to fishing. Changes
are analysed by community properties that might be expected to capture relevant
overall changes – size spectra slopes and intercepts, Shannon-Wiener diversity, and
dominance. Cross-system differences in the shape of the integrated community size
spectra appear to be related to ecosystem productivity. The slope of size spectra
appears to respond in a consistent way to changes in exploitation levels. In most areas
studied, but particularly in high-latitude regions, we observe a decreasing trend in the
slope, reflecting changes in size composition toward a relative decline in larger fish. The
results from tropical regions are less conclusive, partly owing to the difficulty in
obtaining consistent data series, but probably also because the generally higher growth
rates of the constituent species make the slope less sensitive to changes in fishing. No
evidence was found of any decline in species richness, while changes in diversity
(richness and evenness) were caused either by changes in patterns of dominance or by
changes in the number of species identified resulting from improved survey protocols.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | cross-system comparisons, diversity, fish community structure, size spectrum |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Fisheries sciences |
Research Field: | Aquaculture and fisheries stock assessment |
Objective Division: | Environmental Management |
Objective Group: | Terrestrial systems and management |
Objective Field: | Assessment and management of terrestrial ecosystems |
UTAS Author: | Sainsbury, K (Professor Keith Sainsbury) |
ID Code: | 73162 |
Year Published: | 2000 |
Web of Science® Times Cited: | 279 |
Deposited By: | Sustainable Marine Research Collaboration |
Deposited On: | 2011-09-16 |
Last Modified: | 2011-09-22 |
Downloads: | 0 |
Repository Staff Only: item control page