gonochorism


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Related to gonochorism: protogyny

gon·och·o·rism

, gonochorismus (gon-ok'ōr-izm, -ō-riz'mŭs),
Normal gonadal differentiation appropriate to the sex.
[G. gonē, seed, sex, + chōrizō, to separate]

gonochorism

A term that dignifies phenotypically and genotypically appropriate sexual differentiation.

gonochorism

the possession of GONADS of only one sex, either male or female, in an individual.
References in periodicals archive ?
However, the sex allocation pattern of various populations of spotted sand bass appear to vary from functional gonochorism to strict protogyny (Hovey and Allen 2000; Hovey et al.
The consistent, sex-specific differences in growth rates are consistent with functional gonochorism for John's Snapper, for which there is a higher selective pressure for females to grow to a larger size and have a higher fecundity (Roff, 1983).
Examination of the tree, which provides independent data for evaluating the evolution of reproductive strategies, leads us to suggest that hermaphroditism or gonochorism evolved once within studied Ophryotrocha taxa and that sequential hermaphroditism evolved from simultaneous hermaphroditism.
discreta (Ehlers, 1890; Oka, 1895; Marcus, 1939; Mukai and Makioka, 1980; Emschermann, 1985) contains conflicting reports of both comprehensive gonochorism (GgG) and colony hermaphroditism (HhG).
Comprehensive gonochorism (mode GgG): common in the genus Barentsia?
The data for Barentsia hildegardae represent the first compelling demonstration of colony and genet gonochorism (mode GgG) in a kamptozoan.
hildegardae provided unambiguous evidence for comprehensive gonochorism, the samples of colonies growing on ascidians [ILLUSTRATION FOR FIGURE 3A OMITTED] did not.
Field sampling was more strongly suggestive of colony gonochorism for B.
This contradicts earlier reports (Oka, 1895; Marcus, 1939) of colony gonochorism, but supports the findings of one older report (Ehlers, 1890, on B.
However, the data presented here demonstrate that three sexual modes (GgG, HhG, and HhH) are expressed by species of Barentsia, and that comprehensive gonochorism (mode GgG) may be at least as common as HhG.
Comprehensive gonochorism (GgG), as in Barentsia hildegardae, prevents the self-fertilization that might occur if calyces or colonies were hermaphroditic.