Hairston, N.G., Jr. (1979). The relationship between pigmentation and reproduction in two species of Diaptomus (Copepoda). Limnology and Oceanography 24(1):38-44, figs. 1-4, tabs. 1-2.

90565

Hairston, N.G., Jr.

1979

24(1):38-44, figs. 1-4, tabs. 1-2.

Publication

Available in Wilson Copepod Library (non-digital)

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Adult Diaptomus sic&s and Diaptomus neuadensis in two central Washington lakes show a seasonal range in body pigmentation: from high throughout the year to markedly seasonal with a winter and early spring peak. Both species have winter-spring peaks in reproduction in both lakes. Pigment is accumulated by adult females and concentrated in their eggs and nauplii. During the day, the nauplii are at the surface of the lakes where visible light is intense, and it is suggested that the carotenoid functions as photoprotection. Seasonality of adult pigment content varies as a function of predation pressure. In a population experiencing little predation, adults are highly pigmented throughout the year; as predation pressure on the populations increases, the timing of pigmentation maxima contracts to the period of reproduction.

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