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Environmental regulation of the annual reproductive season of Strongylocentrotus purpuratus (Stimpson).
1. The annual reproductive cycle of the Palos Verdes (Southern California) subtidal population of S. purpuratus correlates with seasonal changes in ocean temperature: a rise of temperature above 17°Expand
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Insect Vitellogenin: Identification, Biosynthesis, and Role in Vitellogenesis
Publisher Summary Vitellogenins are defined as the predominant yolk protein precursors that are produced extraovarially and taken up by the growing oocytes against a concentration gradient. One ofExpand
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THE CONTROL OF REPRODUCTION IN DIPLOPTERA PUNCTATA (BLATTARIA)
1. In the viviparous roach, Diploptera, the factors controlling the maturation of the eggs were studied during an interval encompassing the first pre-oviposition, first pregnancy, and secondExpand
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MECHANISMS CONTROLLING REPRODUCTION IN TWO VIVIPAROUS COCKROACHES (BLATTARIA) *
I t was first demonstrated by Wigglesworth (1936) for Rhodnius that egg maturation, that is, yolk deposition in the oocytes, is dependent on the activity of the corpus allatum. Subsequently it wasExpand
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The biosynthesis and processing of vitellogenin in the fat bodies of females and males of the cockroach Leucophaea maderae.
The juvenile hormone analog (JHA) methoprene was used to induce the synthesis of the yolk protein precursor vitellogenin (Vg) in adult females and males of the cockroach Leucophaea maderae. TheExpand
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Ecdysteroids, Juvenile Hormone and Vitellogenesis in the Cockroach Leucophaea maderae.
  • F. Engelmann
  • Biology, Medicine
  • Journal of insect science
  • 27 September 2002
Topical application of 400µg of the juvenile hormone analog, methoprene, to females of the penultimate instar of Leucophaea maderae failed to induce vitellogenin synthesis. However, last instarExpand
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Characterization of spawn-inducing factors in the sea urchin, Strongylocentrotus purpuratus.
Abstract The spawn-inducing radial nerve factor (RNF) of the sea urchin, Strongylocentrotus purpuratus , is a heat-stable polypeptide. The molecular weight of this RNF, as estimated by sodium dodecylExpand
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Studies on the endocrine control of metabolism in Leucophaea maderae (Blattaria): I. The hemolymph proteins during egg maturation
Abstract During egg maturation, particularly in its later phase, the blood protein concentration dropped to approximately half the original level. In the course of pregnancy it slowly rose again. AExpand
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