Smith, S.L. & P.V.Z. Lane. (1987). On the life history of Centropages typicus: responses to a fall diatom bloom in the New York Bight. Marine Biology, Berlin 95(2):305-313.

114313

Smith, S.L. & P.V.Z. Lane

1987

95(2):305-313.

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Laboratory studies and field collections show that egg production by Centro?ages rypicus (Kroyer) in New York shelf waters in autumn 1984 responded to both food and temperature. Rates of egg production were high (43 to 76 eggs female -1 d -1) in October, early in the fall diatom bloom. Later, although food concentrations remained high and female size actually increased, egg production declined, presumably in response to seasonally decreasing temperatures. Carnivorous diets did not support egg production. Development time for autumn-hatched C rypicus was 33 d at 15 ~ a rate that gives a Q10 of 2.21 when compared with the spring development rate of 49 d at 10 ~ We could find no evidence of physiological adjustments being made by this copepod for overwintering. Development was not arrested at any subadult stage and resting eggs were not produced. Trends in body size of copepodid stage V, however, suggest that an overwintering strategy may be invoked by this copepod in January or February.

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