Fitness Differences among Remnant Populations of the Endangered Sonoran Topminnow

Four correlates of fitness were measured in three stocks of the endangered Sonoran topminnow, Poeciliopsis occidentalis, from Arizona. Survival, growth, early fecundity, and developmental stability were greatest in laboratory-reared fish from the most heterozygous natural population studied. Convers...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1989-09, Vol.245 (4921), p.976-978
Main Authors: Quattro, J. M., Vrijenhoek, R. C.
Format: Article
Language:English
Subjects:
Animals
Arizona
Biological and medical sciences
Biological Evolution
Cyprinodontidae
Cyprinodontiformes - genetics
Demographic aspects
Endangered species
Fecundity
Female
Female animals
Fertility
Fish
Freshwater
Fundamental and applied biological sciences. Psychology
Genetic Variation
Genetics
Genetics of eukaryotes. Biological and molecular evolution
Health
Killifishes
Male
Medical genetics
Monkeys
Neurons
Poecilia - anatomy & histology
Poecilia - genetics
Poeciliopsis occidentalis
Population genetics
Population genetics, reproduction patterns
Population mean
Rare fishes
Species Specificity
Sporozoites
Tules
Vertebrata
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Summary:Four correlates of fitness were measured in three stocks of the endangered Sonoran topminnow, Poeciliopsis occidentalis, from Arizona. Survival, growth, early fecundity, and developmental stability were greatest in laboratory-reared fish from the most heterozygous natural population studied. Conversely, all four traits were poorest in fish from a population with no electrophoretically detectable genetic variation. These results emphasize the need for genetic as well as demographic information for the development of comprehensive species recovery programs.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.2772650