Moreira, G.S., J.B. Jillett, W.B. Vernberg & M. Weinrich. (1982). The combined effects of temperature and salinity on the survival of Euterpina acutifrons (Dana) (Copepoda, Harpacticoida) from the New Zealand and Brazilian coasts. Journal of Plankton Research 4(1):85-9l, figs. 1-2, tabs. 1-2.

98822

Moreira, G.S., J.B. Jillett, W.B. Vernberg & M. Weinrich

1982

4(1):85-9l, figs. 1-2, tabs. 1-2.

Publication

Available in Wilson Copepod Library (non-digital)

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The combined effects of temperature and salinity on the survival of non ovigerous female Euterpina acutifrons from the south-eastern New Zealand and southern Brazilian coasts were studied. Six salinities (6, 20, 34, 48, 62 and 76 ‰) and five temperatures (5, 10, 15, 20 and 25°C) were used for New Zealand specimens while six temperatures (5, 10, 15, 20, 25 and 30°C) and the same salinities were employed for the Brazilian specimens. The mortality data were analysed statistically using multiple regression techniques. Animals from New Zealand showed greater tolerance to cold, less to high temperatures and more resistance to both high and low salinities than those from Brazil, Animals from both areas were slightly more tolerant of low temperature in high salinities and of high temperature in low salinities. These striking differences observed between New Zealand and Brazilian populations of E. acutifrons imply the existence of different physiological races in this species.

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