Abstract

Abstract From January 1975 to June 1976, quantitative and qualitative samples of a population of the false crab, Petrolisthes elongatus, were collected at monthly intervals at First Bay, Kaikoura Peninsula, New Zealand. Males and nonovigerous females were present each month, although females usually outnumbered males. Juveniles (<4.0 mm carapace length) formed approximately 40% of the population from May to September 1975 but declined in numbers from October 1975 to May 1976. Ovigerous females were absent from April to September but were collected from October to March, with a peak in January. The number of newly deposited eggs (0.63 × 0.68 mm) carried by ovigerous females increased with increase in carapace length according to the equation y = O.50x2.87 (fitted by least squares). Egg mortalky during development was approximately 15 %. These data are compared with similar published information for P. elongatus from other areas in New Zealand, and several differences in breeding emerge. The breeding period...

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