Environmental Biology of Fishes

, Volume 7, Issue 3, pp 229–242

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

Authors

  • Donald M. Baltz
    • Department of Wildlife and Fisheries BiologyUniversity of California
  • Peter B. Moyle
    • Department of Wildlife and Fisheries BiologyUniversity of California
Article

DOI: 10.1007/BF00002498

Cite this article as:
Baltz, D.M. & Moyle, P.B. Environ Biol Fish (1982) 7: 229. doi:10.1007/BF00002498

Synopsis

The 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.

Keywords

Brood sizeEmbiotocidaeEnvironmental predictabilityReproductive effortReproductive strategySurfperchViviparity
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Copyright information

© Dr. W. Junk Publishers 1982