Abstract
THE crabs measured by Prof. Weldon, which were 12˙5 centimetres long, had the ratio of frontal breadth to carapace length equal to 778˙39 thousandths with a quartile deviation of 10˙79; the adult crabs had the above-mentioned ratio 604˙94 with a quartile deviation of 9˙96. He concluded that since 9˙96 is less than 10˙79 the adults were less variable than the young, and that this diminution of variability might be accounted for by the selective destruction of those young crabs in which the ratio of frontal breadth to carapace length was much greater or less than the average. That Prof. Weldon was mistaken in making this inference may be shown thus:—
Article PDF
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
COBB, J. Measurements of Crabs. Nature 55, 155 (1896). https://doi.org/10.1038/055155b0
Issue Date:
DOI: https://doi.org/10.1038/055155b0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.