Laboratory study of the spawning rate of the calanoid copepod Centropages typicus: effect of fluctuating food concentration |
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Authors: | Nival, Suzanne Pagano, Marc Nival, Paul |
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Affiliation: | Station Zoologique B.P. 28, 06230, Villefranche-sur-mer, France 1Centre Universitaire de Marseille-Luminy Case 901, 70 Route Léon-Lachamp, 13288 Marseille CEDEX9, France |
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Abstract: | The spawning rate of laboratory-reared Centropages typicus fedHymenomonas elongala increases with food concentration, up toa value of {small tilde}2800 µg C (16 500 cells) ml1.An alternation of a low food (1000 cells ml1) and highfood concentration (16 500 cells ml1) is not favourableto egg release when its periodicity is 1 or 2 days, whereasit may be of advantage if it is longer (36 days). Inthe latter case, Centropages typicus will benefit best fromthe rich food diet if this coincides with (or just follows)the last moult. |
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