Abstract
The relative width of the second abdominal segment was used for comparing onset of sexual maturity of female lobsters in 18 different localities of the Maritime Provinces, after establishing a correlation between them. Judging by the abdominal width, the smallest lobsters to carry eggs range from 17.6 to 22.6 cm. long, and the sizes when approximately half the female lobsters are mature range from 23.5 to 29.2 cm. in the whole southern part of the gulf of St. Lawrence and along the outer Nova Scotian coast at least as far as Jeddore; in southern Nova Scotia and Grand Manan the corresponding ranges in size are higher, being 29 to 32 cm. and 36.7 to 40.4 cm. respectively. Graphs are given showing the relative abdominal width in 189 berried lobsters.
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