Ovarian maturation

Lasker, R. and Theilacker, G.H. (1962). The fatty acid composition of the lipids of some Pacific sardine tissues in relation to ovarian maturation and diet. Lipid Research 3,60-64. 

Meakins, R. H. (1974). A quantitative approach to the effects of the plerocercoid of Schistocephalus solidus Muller 1776 on the ovarian maturation of the three-spined stickleback Gasterosteus aculeatus. Zeitschrift fur Parasitenkunde, 44 73-9. 

In decapod crustaceans, the production of ecdysteroids by the Y-organs is inhibited by moult-inhibiting hormone from the eye-stalks [21,22], The ecdysteroids released are E (2-1), 25dE (2-2) and 3DE (2-9), which are converted to 20E (1-1) and poA (2-7). Although elevated levels of ecdysteroids are associated with ovarian maturation and eggs of decapod crustaceans, their functions have not yet been elucidated. 

Plant secondary metabolites which mimic JH activity appear to be active on a narrow range of host species. What account(s) for this effect The majority of bioassays used last larval instars of P. apterus, O. fasciatus and pupae of T. molitor to test for activity of the juvenoids. Are these the most sensitive insects Six JHs have been identified to date different homologs have been isolated from specific insect orders. Juvenile hormone III appears to be ubiquitous [12, 13] and, in most species, is the only JH present. Juvenile hormone I and II are important in the regulation of metamorphosis and ovarian maturation in Lepidoptera [5] and the bis-epoxide appears to be the principle JH in higher Diptera [20]. Therefore, the nature of the JH in the test insect and the role that it plays in development must be considered in the selection of the bioassay a compound which mimics the action of JH in P. apterus (Hemiptera) is unlikely to be active in a Lepidopteran insect. 

In addition to its effects on the molt interval previously described, there are observations that MF is a female gonadotropin. Early, indirect studies involved eyestalk ablation and subsequent ovarian maturation. For example, MOs (the... 

Oostatic Hormones inhibit ovarian maturation (Aea-TMOF) Aedes aegypti YDPAPPPPPP-OH 239... 

TMOF is the abbreviation for "trypsin modulating oostatic factor" which appears to be the primary action of TMOF, inhibiting ovarian maturation through inhibition of midgut trypsin activity and thus blood meal digestion (240). 

Other biological properties have been identified for methyl famesoate and cmstecdysone, in particular the control of ovarian maturation in the shrimp Penaeus vannamei (Chan, 1995), osmoregulation in the crab Carcinus mamas (Lovett et al., 2001), and growth and differentiation in the spider crab Libinia emarginata (Laufer et al., 2002). 

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