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Science 3 February 1978:
Vol. 199. no. 4328, pp. 549 - 552
DOI: 10.1126/science.199.4328.549
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Articles

Coexistence of Clones in a Heterogeneous Environment

ROBERT C. VRIJENHOEK 1

1 Department of Zoology and Bureau of Biological Research, Rutgers University, New Brunswick, New Jersey 08903

Two genetically distinct clones of the asexual triploid fish Poeciliopsis 2 monacha-lucida inhabit the Rio del Fuerte of northwestern Mexico. Their coexistence apparently depends on feeding specializations that result in partitioning of the limited food resources in the desert streams. The findings suggest that these asexual organisms have sufficient clonal diversity to occupy a broad, heterogeneous, adaptive zone.

Submitted on August 11, 1977
Revised on September 28, 1977


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