Results 21 to 30 of about 13,138 (208)

Interaction between the parasitic barnacle Polyascus planus (Cirripedia: Rhizocephala) and its brachyuran host Metopograpsus thukuhar during the development of the externa of the parasite: Control of the gonadal development and vitellogenin synthesis of the host

open access: yesFrontiers in Marine Science, 2022
Developmental profile of the female reproductive apparatus (the externa) of Polyascus planus parasitizing the thukuhar shore-crab Metopograpsus thukuhar is described.
Hsiang-Yin Chen   +6 more
doaj   +1 more source

Egg Production in the Boxelder Bug \u3ci\u3eBoisea Trivittata\u3c/i\u3e (Hemiptera: Rhopalidae) [PDF]

open access: yes, 2018
Boxelder bug females emerged from overwintering sites in the spring and rapidly provisioned eggs with yolk materials. Five discrete egg stages were identified based on egg size, protein content, and degree of chorion sclerotization.
Grimnes, Karin A   +2 more
core   +2 more sources

Mechanisms of Egg Yolk Formation and Implications on Early Life History of White Perch (Morone americana). [PDF]

open access: yesPLoS ONE, 2015
The three white perch (Morone americana) vitellogenins (VtgAa, VtgAb, VtgC) were quantified accurately and precisely in the liver, plasma, and ovary during pre-, early-, mid-, and post-vitellogenic oocyte growth using protein cleavage-isotope dilution ...
Justin Schilling   +4 more
doaj   +1 more source

Histological and Histochemical Dynamism of Oogenesis in the Cinnamon River Prawn Macrobrachium acanthurus (Caridea: Palaemonidae) Induced by Eyestalk Ablation

open access: yesAnais da Academia Brasileira de Ciências, 2022
Macrobrachium acanthurus is a caridean prawn native to Brazil, and studying techniques to assist in its cultivation is important due to economic interest in it.
MARIA M. RODRIGUES   +3 more
doaj   +1 more source

Gonad development and reproduction in the monoecious species Chlorophthalmus agassizi (Actinopterygii: Aulopiformes: Chlorophthalmidae) from the Sardinian Waters (Central-Western Mediterranean) [PDF]

open access: yes, 2010
Background. The shortnose greeneye, Chlorophthalmus agassizi Bonaparte, 1840, is a species with a circumglobal distribution and is among the most abundant commercial fishes in some Mediterranean areas.
Cabiddu S, Cau A, Follesa MC, Porcu C
core   +1 more source

Vitellogenesis in insects and other groups: a review

open access: yesMemorias do Instituto Oswaldo Cruz, 1993
The eggs from oviparous organisms contain large amounts of vitellus, or yolk, wich are utilized by the growing embryo. Vitellogenesis is the process of vitellus accumulation and involves massive heterosynthetic synthesis of the protein vitellogenin (Vg ...
Denise Valle
doaj   +1 more source

Duplicated membrane estrogen receptors in the European sea bass (Dicentrarchus labrax): Phylogeny, expression and regulation throughout the reproductive cycle [PDF]

open access: yes, 2018
The numerous estrogen functions reported across vertebrates have been classically explained by their binding to specific transcription factors, the nuclear estrogen receptors (ERs).
Alvarado, M. Victoria   +5 more
core   +1 more source

Vitellogenesis in Blue Gourami is Accompanied by Brain Transcriptome Changes

open access: yesFishes, 2019
The blue gourami (Trichogaster trichopterus) is a model for hormonal control of reproduction in Anabantidae fish, but also relevant to other vertebrates.
Gad Degani   +3 more
doaj   +1 more source

Transcriptomic Changes during Previtellogenic and Vitellogenic Stages of Ovarian Development in Wreckfish (Hāpuku), Polyprion oxygeneios (Perciformes)

open access: yesFishes, 2019
‘Wreckfish’ a collective of species belonging to the family Polyprionidae, are an important commercial fishery and have significant aquaculture potential.
Matthew J Wylie   +6 more
doaj   +1 more source

Vitellogenesis as a biomarker for estrogenic contamination of the aquatic environment [PDF]

open access: yes, 1995
A rapidly increasing number of chemicals, or their degradation products, are being recognized as possessing estrogenic activity, albeit usually weak. We have found that effluent from sewage treatment works contains a chemical, or mixture of chemicals ...
Arme C   +8 more
core   +2 more sources

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