Journal of Plankton Research Vol.25 no.1 pp.21-33, 2003
© Oxford University Press 2003
Phytoplankton blooms and fish recruitment rate
1 Department Of Applied Mathematics, University Of Leeds, Leeds Ls2 9jt, UK and 3 Cefas Lowestoft Laboratory, Pakefield Road, Lowestoft Nr33 0ht, UK
* Corresponding Author: v.n.biktashev{at}liverpool.ac.uk
2 Present Address: Applied Mathematics, M & O Building, Peach Street, University Of Liverpool, Liverpool L69 7zl, UK. On Leave From Institute For Mathematical Problems In Biology, Pushchino, 142292 Moscow Region, Russia
The relationships between phytoplankton and zooplankton production and fish larval survival to recruitment are examined by linking two generic models. It is first demonstrated that the phytoplanktonzooplankton models can be appropriately combined with a zooplanktonlarvaerecruitment model. The combined model reveals some general principles. Recruitment tends to be a domed-shaped function of initial fish egg production. Bloom phytoplankton conditions are important for high recruitments. The timing and duration of fish egg production is important in determining recruitment through their impact on the phytoplankton bloom. It is argued that optimal recruitment would be obtained if the duration of larval feeding was less than the duration of the phytoplankton bloom; a hypothesis which is testable.
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