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Functional maturity of female lithodids is typically determined by a single method, the size at which females are observed to be brooding egg clutches (ovigerous), and size at maturity is estimated by logistic regression of carapace length when 50% of females are ovigerous (Vinuesa, 1985; Webb, 2014).
In a typical temperate estuary, mature males are most common in low- to mid-salinity areas, and ovigerous, mature females are predominant in high-salinity habitats near the estuarine mouth or in the adjacent coastal ocean (Tankersley & Forward 2007, Table 2).
A new genus of monstrilloid copepods (Crustacea) with anteriorly pointing ovigerous spines and related adaptations for subthoracic brooding.
From the day female ovaries became visible through the cephalothorax (around day 30 of the experimental period), aquaria were visually searched once a day for ovigerous females.
affinis in the Canary Islands occurs from October to May, but ovigerous females were found only in March and April (Lopez Abelian et al., 2002) and from October to March in the Azores (Pinho et al., 2001).
It is consisted of fibrous conjunctive contends flat muscular fibers and blood vessels The albuginea is projected into the ovary toward the lumen, forming ovigerous lamellae, which has oocyte at various stages of development.
The Chromatin nucleolus oocytes (STAGE I) (Figure 1) were the smallest oocytes, appearing grouped in 'clusters of germ cells' (CG) inserted in ovigerous lamellae in vascularized areas, with average diameter ([+ or -] SD) of 9.5 [+ or -] 4.46 [micro]m (Figure 5).
Ovigerous Geograpsus crinipes crabs were collected by hand from the rocky shore of Rabigh (22[degrees]79'N 39[degrees]03'E) on 12 July 2010.
Excysting metacercariae of other digeneans including Microphalloides japonicus [10], Cotylurus strigeoides [11], Microphallus similis [12], Haplorchis taichui [13], and Maritrema novaezealandensis [5] can be maintained up to several days in vitro and mature into ovigerous adults, but the eggs produced are frequently malformed or unembryonated (reviewed by [2, 3, 14]).