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Fat body, hemolymph and ovary routes for delivery of substances to ovary in Melipona quadrifasciata anthidioides: Differences among castes through the use of electron-opaque tracers
(2013-08-01)
The yolk protein precursor, vitellogenin (Vg), in bees is synthesized in the fat body trophocytes, delivered to the hemolymph and ultimately absorbed from there during the vitellogenic phase of oocytes in the active ovary. ...
Morphological characterization of the ovary and oocytes vitellogenesis of the tick Rhipicephalus sanguineus (Latreille, 1806) (Acari : Ixodidae)
(Elsevier B.V., 2005-06-01)
This study presents the morphology of the ovary, as well as the process of the vitellogenesis in oocytes of the tick Rhipicephalus sanguineus. The ovary of these individuals is of the panoistic type; therefore, it lacks ...
Ovary and oocyte maturation of the tick Amblyomma brasiliense Aragao, 1908 (Acari: Ixodidae)
(Pergamon-Elsevier B.V. Ltd, 2010-01-01)
This study describes the ovary anatomy and dynamics of oocytes maturation process of Amblyomma brasiliense ticks. The ovary is of panoistic type lacking nurse and follicular cells. This organ consists of a single continuous ...
Development of worker ovaries in Brazilian Africanized honeybees (Hymenoptera: Apidae)
(2004-11-23)
The present paper compares the worker ovaries development in queen right and orphaned colonies of Brazilian Africanized honeybee. The results show that in both colonies some workers starting 20 days after emergence, present ...
Histological assessment of ovaries and uterus of rats subjected to nandrolone decanoate treatment
(Elsevier B.V., 2005-07-01)
This study aimed to analyze the effects of nandrolone decanoate on the ovaries and uterus of adult females rats. This drug was administered intraperitoneally, at one, two and three doses of 3 mg nandrolone decanoate/kg of ...
Apis mellifera (Hymenoptera, Apini) Ovary Development in Queens and in Workers from Queenright and Queenless Colonies
(2003-12-08)
A morphological study of the development of the ovaries in workers from queenright and queenless colonies and queens of Apis mellifera is presented and discussed. The mating stimulates the ovary development and the egg-laying. ...
Structure and ultrastructure of the ovary in the South American Veturius sinuatus (Eschscholtz) (Coleoptera, Passalidae)
(Arthropod Structure & Development, 2018)
Amblyomma triste (Koch, 1844) (Acari : Ixodidae) Ovaries: An ultrastructural analysis
(Elsevier B.V., 2007-08-01)
This study presents an ultrastructural analysis of the ovary of the tick, Amblyomma triste. The ovary of this species is of the panoistic type that is, without nursing and follicular cells. It is composed of a layer of ...
Effect of mating delay in the ovary of Apis mellifera L. (Hymenoptera, Apidae) queens: Histological aspects
(2007-11-30)
This paper reports the effect of mating delay on the queen Apis mellifera ovaries based on a light microscopy analysis. Soon after a queen emerges from the brood cell, oocytes start to differentiate in the ovaries, but if ...
Ultrastructure of the ovary of Dermatobia hominis (Diptera: Cuterebridae): III. Gonial cell degeneration
(Instituto Oswaldo Cruz, Ministério da Saúde, 1992-09-01)
We studied the ultrastructural aspects of pre-pupae and pupae ovaries of Dermatobia hominis. Physiological degeneration of gonial cells was observed: (a) after the ovarioles differentiation, in the oogonia residing in the ...