Results 21 to 30 of about 4,036 (162)
Scientia Marina, 2014 Ultrastructural features of oogenesis of the iteroparous and long lived eunicid polychaete Marphysa sanguinea (Montagu, 1815) from the Lagoon of Tunis were studied using both light and transmission electron microscopy methods.
Monia Elbarhoumi +3 more
doaj +1 more source
Frontiers in Marine Science, 2022 The Pacific white shrimp Litopenaeus vannamei is an economically important penaeid species worldwide. Under farming conditions, the full ovarian maturation of L.
Zhi Li +12 more
doaj +1 more source
Histochemical characteristics of the vitellogenic oocytes of the bluefin tuna, Thunnus thynnus L.
Ciencias Marinas, 2002 Very little information is available with respect to dynamic aspects of oocyte development and to yolk composition of tuna species. Since histological approaches can offer considerable information about the ovarian development of fish, and because ...
C Sarasquete +7 more
doaj +1 more source
Vitellogenesis of diphyllobothriidean cestodes (Platyhelminthes)
Comptes Rendus. Biologies, 2015 The recently erected cestode order Diphyllobothriidea is unique among all tapeworm orders in that its species infect all major groups of tetrapods, including man. In the present paper, the vitellogenesis of representatives of all three currently recognized families of this order was evaluated, based on ultrastructural (transmission
Aneta, Yoneva +3 more
openaire +2 more sources
Vitellogenesis in Manduca sexta [PDF]
Memórias do Instituto Oswaldo Cruz, 1987 Eggs of Manduca sexta contain four well-characterized protein derived from hemolymph: vitellogenin and lipophorin (very high density lipoproteins); microvitellogenin, a 26,000 dalton female-specific protein lacking lipid and carbohydrate, and insecticyanin, a blue biliprotein composed of four identical 22,000 dalton subunits.
Kawooya, John K. +2 more
openaire +3 more sources
Dog attacks on wild desert tortoises: A risk model
The Journal of Wildlife Management, EarlyView.Domestic dogs attack and severely injure wild desert tortoises at the urban and ex‐urban interface with deserts. Severe trauma to tortoises increased 4 times to shell and limbs and 16.5 times to the gular horn over the decades between the 1970s and 2000s. Tortoises were at exponential risk of severe trauma when living within 12 km of settlements, towns,
Andrea S. Carlson +2 more
wiley +1 more source
Mechanisms for type-II vitellogenesis-inhibiting hormone suppression of vitellogenin transcription in shrimp hepatopancreas: Crosstalk of GC/cGMP pathway with different MAPK-dependent cascades. [PDF]
PLoS ONE, 2018 Vitellogenesis is the process of yolk formation via accumulating vitellin (Vn) with nutrients in the oocytes. Expression of vitellogenin (Vg), the precursor of Vn, is one of the indicators for the start of vitellogenesis.
Ting Chen +6 more
doaj +1 more source
Vitellogenesis and Yolk Proteins, Birds
, 2018 Vitellogenesis and yolk proteins ...
Réhault-Godbert, Sophie, Guyot, Nicolas
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Vitellogenesis and choriogenesis in fishes [PDF]
Fisheries Science, 2016 In studies of sex discrimination in fish in the early 1900s, a specific antigen in the blood of gravid females was identified using immunological methods. At present, this specific antigen is known as vitellogenin, the major precursor of egg yolk protein that is synthesized in the female liver and is secreted into the blood to be incorporated into the ...
Hara, Akihiko +2 more
openaire +1 more source
Regulatory mechanisms of reproduction in locusts and grasshoppers
New Plant Protection, EarlyView.Regulatory networks composed of numerous coding and noncoding genes play crucial roles in the reproduction of locusts and grasshoppers. This review integrates mechanistic advances in reproductive regulation, highlighting environmentally adaptive pathways and providing prospective targets for eco‐friendly pesticides.
Jing He, Jiliang Wang, Xinran Wang
wiley +1 more source