Life history characteristics of tule perch (Hysterocarpus traski) populations in contrasting environments

TitleLife history characteristics of tule perch (Hysterocarpus traski) populations in contrasting environments
Publication TypeJournal Article
Year of Publication1982
AuthorsBaltz, D. M., & Moyle P. B.
JournalEnvironmental Biology of Fishes
Volume7
Issue3
Pagination229-242
Date Published06/1982
ISSN0378-1909
KeywordsBrood size, Embiotocidae, Environmental predictability, Reproductive effort, Reproductive strategy, Surfperch, Viviparity
AbstractThe life history characteristics of tule perch were compared within and among populations in three drainages with substantially different environmental conditions. Within populations there were, in general, substantial increases in brood size, size of young, brood weight, and gonadal-somatic index (GSI) with age and with size of female. In at least one population there was a trade-off between the number and size of young produced. However, in a lake where individual growth was very slow, brood weight, GSI, and other life history characters showed decreasing trends with age. Among populations in isolated drainages, female length at first reproduction and longevity varied directly and mean brood size varied inversely with environmental predictability. Morphological and geological evidence and some comparative litter characteristics suggest that life history differences among populations in isolated drainages are in part genetic.
URLhttp://dx.doi.org/10.1007/BF00002498
DOI10.1007/BF00002498