Why is the cladoceran Simocephalus vetulus (Müller) not a 'bang-bang strategist '? A critique of the optimal-body-size model

Détails

ID Serval
serval:BIB_C2B9391D8622
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Why is the cladoceran Simocephalus vetulus (Müller) not a 'bang-bang strategist '? A critique of the optimal-body-size model
Périodique
Functional Ecology
Auteur(s)
Perrin N., Ruedi M., Saiah H.
ISSN
0269-8463
Statut éditorial
Publié
Date de publication
1987
Peer-reviewed
Oui
Volume
1
Numéro
3
Pages
223-228
Langue
anglais
Notes
IDEB794794C386_ http://www.jstor.org/stable/2389424
Résumé
Lynch's (1980a) optimal-body-size model is designed to explain some major trends in cladoceran life histories; in particular the fact that large and littoral species seem to be bang-bang strategists (they grow first and the reproduce) whereas smaller planktonic species seem to be intermediate strategists (they grow and reproduce simultaneously). Predation is assumed to be an important selective pressure for these trends.
Simocephalus vetulus (Müller) does not fit this pattern; being a littoral and relatively large species but an intermediate strategist. As shown by computer simulations, this species would reduce its per capita rate of increase by adopting the strategy predicted by the optimal-body-size model. Two aspects of the model are criticized: (1) the optimization criterion is shown to be incorrect and (2) the prediction of an intermediate strategy is not justified.
Structural constraints are suggested to be responsible for the intermediate strategy of S.vetulus. Biotic interactions seem to have little effect on the observed life-history patterns of this species.
Mots-clé
Cladoceran, growth, reproductive strategy, dynamic optimization, life-history theory
Web of science
Création de la notice
24/01/2008 18:53
Dernière modification de la notice
03/03/2018 21:10
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