Fine structure of the ovary in the red abalone Haliotis rufescens (Mollusca: Gastropoda)

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“…These two subgroups of Oc 1 do not yet exhibit any secretory granules. Thus they may correspond to the presynthetic oocytes as described by Martin et al, 23 when cells are preparing themselves for the onset of synthetic activities.…”

“…In any cases these two subgroups of Oc 5 should represent fully mature cells. In comparison to the work of Martin et al, 23 Oc 4 could represented the early postsynthetic cells and Oc 5 late postsynthetic cells; even though, judging from ultrastructural features certain degree of synthetic activities must still be carried out in these cells.…”

“…[13][14][15][16][17][18][19][20][21][22] More recently, a fine structural study of the ovarian cells in the red abalone, H rufescens, was also undertaken by Martin et al 23 All of these studies confirmed similar pattern of structural organization of the gonads; however, there are some disagreements on the classification of the stages of germ cells in the oogenetic and spermatogenic processes. 15,16,18,20 Utilizing a high resolution TEM to study the relative abundance of various organelles, particularly ribosomes and the development of rough endoplasmic reticulum and Golgi complexes in the cells, Martin et al 23 suggested that there were 5 stages of female germ cells in H rufescens, which they termed oogonium, presynthetic oocyte, synthetic oocyte, early postsynthetic oocyte and fully developed postsynthetic oocyte. We feel that the classification based on size alone, as adopted by many investigators, is not a good criterion for dividing cells in a single line of differentiation into various stages, because in reality these cells are undergoing continuous development.…”

Histological Validation of Morphochromatically-Defined Gonadal Maturation Stages of Green Abalone (Haliotis fulgens) Philippi,1845 and Pink Abalone (Haliotis corrugata) Wood, 1828

“…1). The hepatogonadal complex is conical in shape and consists of two organs: the inner one is the digestive gland (hepatopancreas), while the outer one is the gonad (Cox;Martin et al, 1983) (Fig. 2).…”

“…The position of the gonad within the hepatogonadal complex allows its color to be distinguished from outside, thus making it possible to determine the sex of the specimen examined (beige or cream in males, green in females) (Boolootian et al, 1962;Cox;Martin et al;Sobhon et al, 1999;Singhakaew et al, 2003;Garcia-Esquivel 2007;Roux et al, 2013;Hadijah et al, 2013) without dissecting it; sometimes it is also possible to infer its maturity stage based on gonad firmness and size.…”