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Title: An Analysis of Some Meristic Characters of the Staghorn Sculpin Leptocottus armatus Girard 
Author: Morris, Robert W.
Date: 1977-07
Publisher: University of Hawaii Press
Citation: Morris RW. 1977. An analysis of some meristic characters of the staghorn sculpin Leptocottus armatus Girard. Pac Sci 31(3): 259-277.
Abstract: Over a 4-year period, juvenile specimens of Leptocottus armatus
were collected annually at nine stations along the Pacific coast from approximately
37 to 47° N latitude. Collecting was repeated at intervals at two stations
(43°24' N and 44°36' N) during the seasons in which young fish were arriving
from the plankton. Meristic character counts are similar over the northern
part of the range studied, but there is a well-defined cline in conditions south
of 43° N. The number of spines on the dorsal fin appears to be influenced very
little by natural developmental conditions, if at all. At the two stations sampled
at approximately monthly intervals, well-defined seasonal trends in meristic
character counts appear to be related to thermal history. Freedom of independent
expression of meristic characters in response to the natural developmental
environment is restricted by timing of phenocritical periods and a factor
of a more fundamental nature, presumably genetic.
ISSN: 0030-8870

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