Arashkevich, E.G. & A.V. Drits. (1997). Biokhimicheskiy sostav, skorost' dykhaniya i razvitiye gonad u pozdnikh kopepoditov Calanoides carinatus (Krøyer) iz rayona apvellinga Bengely. [Biochemical composition, respiration rate and gonad development in late-stage copepodites of Calanoides carinatus (Krøyer) from the Benguela upwelling region.]. Okeanologiya. 37(4):571-577. (Russian.).

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Arashkevich, E.G. & A.V. Drits

1997

37(4):571-577. (Russian.)

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Biochemical composition, respiration rate and gonad development in CIVs, CVs and adults of Calanoides carinatus in the Benguela upwelling region were investigated. The changes of these parameters within each stage were analysed. The surface CV were shown to follow two trends of development. Those with a small oil sac, low lipid content and well developed gonads seem to moult immediately into adults. Others with a large oil sac, high lipid content and small undeveloped gonads were assumed to form a diapausing stock descending into deeper layers. A correlation between biochemical composition, respiration rate, gonad development and oil sac volume was obtained. Copepods with maximum lipid and protein content, small undifferentiated gonads and minimum respiration rate seem to be in the initial "deep" diapause phase. The size of gonads and respiration rate increased with the lipid expenditure. At the end of diapause, copepods that consumed nearly all of the lipid and some of the protein had gonads similar to those of the adults. Diapausing CV could moult in the deep layers. However, reproduction is likely to occur only after an ascent into the upper layers when feeding begins.

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