Hybridization between parthenogenetic lizards (Aspidoscelis neomexicana) and gonochoristic
lizards (Aspidoscelis sexlineata viridis) in New Mexico: ecological, morphological, cytological, and molecular context.
Although the majority of threadfin species are apparently protandrous hermaphrodites, a few are gonochoristic
(Dentzau and Chittenden Jr, 1990).
Lutjanids are considered gonochoristic
, achieving sexual maturity with 40 to 50% of the maximum length and fecundity values are high (Grimes 1987).
Recently, proposals for a classification system of gonad development in both gonochoristic
and hermaphroditic fishes have been made (e.
Generally, this predominance is an advantage for oviparous gonochoristic
species, inasmuch as each male can mate with several females.
Intersex has been reported in a wide variety of gonochoristic
species of wild freshwater and marine fish worldwide (Allen et al.
As a consequence, parthenogens would have a competitive advantage over sexuals, in analogy to the "cost of males" (Maynard Smith 1978) in gonochoristic
Rockfishes are gonochoristic
, with internal fertilization.
The model was developed to examine the impact of participation by secondary males in population productivity, the influence of size at sex transformation, and the subsequent robustness of the population under exploitation, in comparison with equivalent gonochoristic
and typical protogynous populations.
Several previous studies reported the sexual bipotentiality of germ cells into adulthood even in gonochoristic
fish species (Pandian and Sheela, 1995; Baroiller et al.
neomexicana, assemblages of whiptails at Ute Lake and Conchas Lake included gonochoristic
(sexually reproducing) A.
The sea scallop Placopecten magellanicus (Gmelin 1791) is one of the few gonochoristic
broadcast spawners in the pectinid family.