Adaptabilidad del poccilido de gila en peligro

Ruby J. Sheffer, Philip W. Hedrick, W. L. Minckley, Anthony L. Velasco

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The Gila topminnow (Poeciliopsis o. occidentalis) is a small, live-bearing, endangered fish extant in a maximum of nine locales in four separate watersheds in the United States. To determine if these populations differed in their fitness, we obtained samples from the four watersheds and examined them for four fitness correlates survival, growth rate, fecundity, and bilateral asymmetry. Earlier research found that one population, Sharp Spring, had higher allozyme heterozygosity than the other three and had higher survival, growth rate, and fecundity and lower bilateral asymmetry than a sample from one of the other populations with no polymorphic allozyme loci, Monkey Spring. We also verified that Sharp Spring fish were polymorphic for the same allozyme loci whereas the Monkey Spring population was not. We did not, however, find positive associations of allozyme heterozygosity with the four fitness correlates for the four samples. Because the earlier study had much lower survival, it is likely that the differences resulted from differential response of the two populations to a stressful laboratory environment. Whether this unknown stress occurs in natural environments or its effect is predictive of other stresses remains unresolved. As a result, we concur with suggestions in the draft recovery plan that topminnows from nearby sources by used for reintroductions and that the Sharp Spring stock not be used outside the upper Santa Cruz River drainage.

Original languageEnglish (US)
Pages (from-to)162-171
Number of pages10
JournalConservation Biology
Volume11
Issue number1
DOIs
StatePublished - Feb 1997

Fingerprint

allozyme
Isoenzymes
allozymes
fitness
Fundulidae
Watersheds
heterozygosity
Fish
fecundity
asymmetry
Bearings (structural)
monkeys
watershed
recovery plan
reintroduction
fish
loci
Drainage
sampling
Rivers

ASJC Scopus subject areas

  • Environmental Science(all)
  • Ecology
  • Environmental Chemistry
  • Nature and Landscape Conservation

Cite this

Sheffer, R. J., Hedrick, P. W., Minckley, W. L., & Velasco, A. L. (1997). Adaptabilidad del poccilido de gila en peligro. Conservation Biology, 11(1), 162-171. https://doi.org/10.1046/j.1523-1739.1997.95525.x

Adaptabilidad del poccilido de gila en peligro. / Sheffer, Ruby J.; Hedrick, Philip W.; Minckley, W. L.; Velasco, Anthony L.

In: Conservation Biology, Vol. 11, No. 1, 02.1997, p. 162-171.

Research output: Contribution to journalArticle

Sheffer, RJ, Hedrick, PW, Minckley, WL & Velasco, AL 1997, 'Adaptabilidad del poccilido de gila en peligro', Conservation Biology, vol. 11, no. 1, pp. 162-171. https://doi.org/10.1046/j.1523-1739.1997.95525.x
Sheffer RJ, Hedrick PW, Minckley WL, Velasco AL. Adaptabilidad del poccilido de gila en peligro. Conservation Biology. 1997 Feb;11(1):162-171. https://doi.org/10.1046/j.1523-1739.1997.95525.x
Sheffer, Ruby J. ; Hedrick, Philip W. ; Minckley, W. L. ; Velasco, Anthony L. / Adaptabilidad del poccilido de gila en peligro. In: Conservation Biology. 1997 ; Vol. 11, No. 1. pp. 162-171.
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