Bisexual juvenile gonad and gonochorism
in the fairy basslet Gramma loreto.
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.
Our initial prediction was that the plasticity of mating strategy (gonochorism to protogyny) described in different populations of this sea bass may be maintained by a variety of spawning strategies as seen in several species of wrasses (Warner and Hoffman 1980; Warner 1982 1984, Adreani and Allen, in press).
The sex of bivalves is categorized into gonochorism
and hermaphroditism just as in other sexual reproduction organisms.
Females grew to a larger mean asymptotic fork length ([L.sub.[infinity]]) than did males, a finding consistent with functional gonochorism. Otolith weight at age and gonad weight at length followed the same latitudinal trends seen in length at age.
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).
(1997) among others, argue that Ophryotrocha is a near ideal group for studies of the evolution of sex strategies, since all known forms (gonochorism, sequential and simultaneous hermaphroditism) are represented within a few closely related species.
pueril is is "a modified simultaneous hermaphrodite in which a reversible mechanism of temporal inhibition of one of the two sexual phases has evolved." The problem of whether gonochorism or hermaphroditism is the ancestral state was also thoroughly discussed by Sella and Ramella (1999).
Our conclusion about gonochorism
emphasizes function; in other words, all individuals reproduce exclusively as either male or female during their lives (Sadovy de Mitcheson and Liu, 2008).
Furthermore, colonial animals have rarely been monitored over time, so it has been difficult to distinguish gonochorism
from sequential hermaphroditism (hermaphroditism with discrete, separated periods of male and female maturity) at any level.
and seasonal variations in the gonads of the labrid Symphodus (Crenilabrus) ocellatus (Forsskal).
, protandry, protogyny, and hermaphroditism are the recognized reproductive styles of sparids (Smale, 1988; Buxton and Garratt, 1990).