The Library
The effects of seasonal processes on size spectrum dynamics
Tools
Datta, Samik and Blanchard, J. L. (Julia L.) (2016) The effects of seasonal processes on size spectrum dynamics. Canadian Journal of Fisheries and Aquatic Sciences, 73 (4). pp. 598-610. doi:10.1139/cjfas-2015-0468 ISSN 0706-652X.
|
PDF
WRAP_cjfas-2015-0468.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (1933Kb) | Preview |
Official URL: http://dx.doi.org/10.1139/cjfas-2015-0468
Abstract
The recent advent of dynamic size spectrum models has allowed the analysis of life processes in marine ecosystems to be carried out without the high complexity arising from interspecies interactions within dense food webs. In this paper, we use "mizer", a size spectrum modelling framework, to investigate the consequences of including the seasonal processes of plankton blooms and batch spawning in the model dynamics. A multispecies size spectrum model is constructed using 12 common North Sea fish species, with growth, predation, and mortality explicitly modelled, before simulating both seasonal plankton blooms and batch spawning of fish (using empirical data on the spawning patterns of each species). The effect of seasonality on the community size spectrum is investigated; it is found that with seasonal processes included, the species spectra are more varied over time, while the aggregated community spectrum remains fairly similar. Growth of seasonally spawning mature individuals drops significantly during peak reproduction, although lifetime growth curves follow nonseasonal ones closely. On analysing properties of the community spectrum under different fishing scenarios, seasonality generally causes more varied spectrum slopes and lower yields. Under seasonal conditions, increasing fishing effort also results in greater temporal variability of fisheries yields due to truncation of the community spectrum towards smaller sizes. Further work is needed to evaluate robustness of management strategies in the context of a wider range of seasonal processes and behavioural strategies, as well as longer term environmental variability and change.
Item Type: | Journal Article | ||||||||
---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QA Mathematics Q Science > QH Natural history |
||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||||||
Library of Congress Subject Headings (LCSH): | Marine ecology -- Mathematical models, Plankton blooms -- Mathematical models, Fishes -- Mathematical models | ||||||||
Journal or Publication Title: | Canadian Journal of Fisheries and Aquatic Sciences | ||||||||
Publisher: | N R C Research Press | ||||||||
ISSN: | 0706-652X | ||||||||
Official Date: | 16 February 2016 | ||||||||
Dates: |
|
||||||||
Volume: | 73 | ||||||||
Number: | 4 | ||||||||
Page Range: | pp. 598-610 | ||||||||
DOI: | 10.1139/cjfas-2015-0468 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 12 May 2016 | ||||||||
Date of first compliant Open Access: | 12 May 2016 | ||||||||
Funder: | Natural Environment Research Council (Great Britain) (NERC), Centre for Environment, Fisheries and Aquaculture Science (Great Britain) (CEFAS), Great Britain. Department of Health (DoH), Great Britain. Department for Environment, Food and Rural Affairs (DEFRA) | ||||||||
Grant number: | NE/L003279/1 (NERC) |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year