The ecological significance of some early sea temperature records from Otago Harbour

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Abstract
Recorded sea temperatures for Portobello, Otago Harbour, for 1905 and 1906 are approximately 3°C lower than recent temperatures from the same recording station. Comparison of available temperature records for this locality with Dunedin temperatures over the same period suggests that the anomaly is due to an instrumental calibration error rather than a significantly lower temperature regime for those years. Thus, the local fauna does not necessarily tolerate sea temperatures as low as those previously published, and deductions of earlier workers on the effects of low temperatures on fish-rearing experiments at Portobello may be invalidated.

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