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LIFE-HISTORY VARIATION UNDER VARYING DEGREES OF INTRASPECIFIC COMPETITION IN THE TADPOLE SHRIMP TRIOPS LONGICA UDA TUS (LECONTE
JOURNAL OF CRUSTACEAN BIOLOGY (1990)
  • Stephen C. Weeks
Abstract
Four lines (3 selfing and 1 sexual) of the tadpole shrimp Triops longicaudatus (LeConte), reared in the laboratory, exhibited significant reductions in growth and egg production with increasingd ensity( 5, 10, and 16 shrimpp er 40-1a quarium)G. rowtha nd fecundityw ere similar within the 2 morphologically distinguishable forms (long and short), whereas the long-form shrimp grew larger but produced fewer eggs than the short-form shrimp. Growth and age at deathd id not differb etweent he 2 reproductivec lasses.T he sexuals hrimps howedl owera verage egg production than the 3 selfing lines. Life-history trade-offs were not apparent between egg
production, growth, and survivorship within any of the 4 lines examined. However, a nonsignificant negative correlation was found between mean egg production and growth among the 4 shrimp lines. These ecological results, combined with electrophoretic and morphological measures, reveal a consistent pattern of differences between the long and short forms of T.longicaudatus
Publication Date
1990
Citation Information
Stephen C. Weeks. "LIFE-HISTORY VARIATION UNDER VARYING DEGREES OF INTRASPECIFIC COMPETITION IN THE TADPOLE SHRIMP TRIOPS LONGICA UDA TUS (LECONTE" JOURNAL OF CRUSTACEAN BIOLOGY Vol. 10 Iss. 3 (1990) p. 498 - 503
Available at: http://works.bepress.com/stephen_weeks/82/