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Biometric Characteristics of the Three‐Spined Stickleback ( Gastetosteus aculeatus L.) from the Northern Baltic Proper
Author(s) -
Aneer Gunnar
Publication year - 1974
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1974.tb00747.x
Subject(s) - biology , stickleback , three spined stickleback , gasterosteus , zoology , fish <actinopterygii> , anatomy , biometrics , fishery , computer security , computer science
Three‐spined sticklebacks from the northern Baltic proper, caught in 1968 and 1969, were examined with regard to number of plates, body length, head length in relation to body length, and the percental proportions of the forms trachurus, leiurus (= gymnurus) , and semiarmatus. A total number of 1791 specimens were examined. It is shown that the number of asymmetric specimens, regarding the number of plates on the right and left side of the body, is higher than numbers shown earlier, and that there is a significant difference in relative head length between females and males, and, that smaller fish displayed proportionally longer heads than adults. Semiarmatus specimens accounted for about 80 per cent of the samples and only 2 leiurus specimens were found.