Population dynamics of exploited cultures of calanoid copepods View Full Text


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Article Info

DATE

1970-05

AUTHORS

D. R. Heinle

ABSTRACT

En laboratoire, cultures des copépodes calanoides,Acartia tonsa (Dana) etEurytemora affinis (Poppe) étaient exposées à différents taux de déprédation, allant de 10 à 24% des populations par jour, suivant les espèces et les températures. Les densités des populations variaient considérablement, ce qui provenait probablement des évènements intermittents (la nourriture et les récoltes) habituelles de la procédure en laboratoire. La bibliographie, ainsi que mes propres observations avancent deux mécanismes homéostatiques. Le cannibalisme aide à régulariser la population d'A. tonsa quand la nourriture devient rare par suite de la haute densité des populations. La proportion des femelles adultes augmente durant les densités basses des populations d'A. tonsa. La proportion sexuelle génésique de ces populations était de 1:1. L'augmentation proportionnelle des femelles paraisse provenir de mâles génotypiques changeant en femelles phénotypiques au cours de leur croissance. Cette proportion plus élevée des femelles augmente le taux de la reproduction quand les populations étaient peu denses. More... »

PAGES

360-372

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf01609913

DOI

http://dx.doi.org/10.1007/bf01609913

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1032753330


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