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ENVIRONMENTALLY CONTROLLED INDUCTION OF PRIMARY MALE GONOCHORISTS FROM EGGS OF THE SELF-FERTILIZING HERMAPHRODITIC FISH, RIVULUS MARMORATUS POEY.
TLDR
Two series of experiments were undertaken to identify a possible environmental factor able to cause a deviation to the male phenotype during sex differentiation, on the working hypothesis that low male incidence in clones composed otherwise of hermaphrodites indicated a lability in the sex-determining mechanism through which the genotype normally produces the herMaphrodite phenotype.
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The Osteocranium of the American Cyprinid Fish, Notropis bi- frenatus, with an Annotated Synonymy of Teleost Skull Bones
TLDR
An attempt has been made to describe the skull of a cyprinid, making full use of existing terminology with special application to the group, to illustrate clearly each bone in relation to adjacent bones; and to name each bones in conformity with the present state of teleostean skull morphology.
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Oviparous Hermaphroditic Fish with Internal Self-Fertilization
TLDR
Adults of Rivulus marmoratus (Cyprinodontidae) contained eggs when dissected or laid eggs when kept alive, and both juvenescent and senescent fish have functional ovotestes.
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Food Selection among Fishes Invading a High Subtropical Salt Marsh: From Onset of Flooding through the Progress of a Mosquito Brood
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The Homozygosity of Clones of the Self-Fertilizing Hermaphroditic Fish Rivulus marmoratus Poey (Cyprinodontidae, Atheriniformes)
TLDR
Two clones of the hermaphroditic fish Rivulus marmoratus Poey, identified by their intraclonal histocompatibilities and interclonal histoincompatibility, were kept through successive uniparental generations, each fish in isolation to study the possible role of males in the prevalence of homozygous clones in the wild.
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Twenty-Four-Hour Rhythms of Internal Self-Fertilization and of Oviposition by Hermaphrodites of Rivulus marmoratus
TLDR
The subject of the present report is one of several studies for which this fish is uniquely suited, in the following respects: Rivulus marmoratus hermaphrodites isolated from the instant of their emission as eggs by their hermphrodite parent through extraparental incubation, hatching, and subsequent life.
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The Discovery in Florida of the Cyprinodont Fish, Rivulus marmoratus, with a Redescription and Ecological Notes
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EVIDENCE FOR THE EXISTENCE OF HOMOZYGOUS CLONES IN THE SELF-FERTILIZING HERMAPHRODITIC TELEOST RIVULUS MARMORATUS (POEY)
TLDR
The transplantation test has been used to determine whether fish that had descended from the same wild-caught progenitor possess identical genotypes, and it has proved that hermaphrodites kept in isolation in aquaria, and their her maphrodite descendants keep in isolation ab ovo, have reproduced by self-fertilization.
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Delimitation of the Thermolabile Phenocritical Period of Sex Determination and Differentiation in the Ontogeny of the Normally Hermaphroditic Fish Rivulus marmoratus Poey
TLDR
All specimens taken in the wild by the writer have had the external appearance typical of the females of this genus but have proved to be hermaphrodites, emitting self-fertilized eggs with intraparental incubations ranging from a few minutes to 21 days, followed by much longer extraparentAL incubations.
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How Ecological and Genetic Factors Interact to Determine When Self-Fertilizing Hermaphrodites of Rivulus marmoratus Change into Functional Secondary Males, With a Reappraisal of the Modes of…
TLDR
Testicular activity, measured by percentages of self-fertilized eggs laid, was much lower throughout the hermaphrodite phase of fish early-rearing at low temperature as contrasted with high, but ovarian activity was similar between fish earlyreared at low and at high temperature.
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