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Le déterminisme du sexe de l’huître creuse Crassostrea gigas au cours de son développement et du cycle gamétogénétique adulte : recherche de déterminants moléculaires ArchiMer
Naimi, Amine.
The pacific oyster Crassostrea gigas is a successive protandric irregular hermaphrodite. The factors involved in the first gonadic differentiation in juveniles and those involved in sex reversal in adults are still unknown. This thesis consisted in the identification of molecular factors of the oyster’s gonadic differentiation during its adult cycle and its development. Thus, the respective orthologs to a DM-family factor and to Foxl2, Cg-DMl and Cg-Foxl2, have been characterized in the oyster by RT-PCR. Their study by real-time PCR, in situ hybridization and immunohistochemistry, has highlighted a ubiquitous expression of Cg-DMl in potentially proliferating / differentiating cells in the gonads of both sexes. The Cg-Foxl2 expression is specific to the...
Tipo: Text Palavras-chave: Différenciation sexuelle; Crassostrea gigas; Mollusques marins; Gamétogenèse; Hermaphrodisme; DMRT; FOXL2; Sex differentiation; Crassostrea gigas; Marin molluscs; Gametogenesis; Hermaphroditism; DMRT; FOXL2.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00012/12291/9080.pdf
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ผลของ 17 beta-estradiol ต่อการเปลี่ยนเพศปลาหมอไทยระยะไข่ โดยวิธีการแช่ Thai Agricultural
Phonesack Matthavong; Siripavee Charoenwattanasak; Bundit Yuangsoi; Sutee Wongmaneeprateep.
The effect of 17β-estradiol on sex reversal of climbing perch (Anabas testudineus) egg phase by immersion method were studied. The fish eggs were immersed with 17β-estradiol at the level of 0 (control group), 50, 100, 150 and 200 μg/l in fiberglass tanks containing 5 L freshwater for 4 days. Five hundred eggs were used for each treatment with the experiments being done in 4 replicate. After hatching, hatching rates of the fish were not significantly different regardless of levels 17β-estradiol. Initial length and weight of the fish were measured at the beginning of the experiment. After nursing for 56 days in suitable condition, sex reversal rate, length gain, weight gain, average daily growth, specific growth rate and survival rate of the fishes were...
Tipo: PhysicalObject Palavras-chave: Climbing perch; Anabas testudineus; Egg phase; Sex reversal; 17 beta-estradiol; Hormones; Immersion method; Growth rate; Survival rate; Sex differentiation; ปลาหมอไทย; ระยะไข่; อัตราการเปลี่ยนเพศ; เพศเมีย; ฮอร์โมน 17 เบต้า-เอสตาไดออล; การแช่ไข่ปลา; อัตราการเจริญเติบโต; อัตราการฟัก; อัตราการรอดตาย; ลักษณะของเซลล์สืบพันธุ์; การเพิ่มผลผลิต; การเปลี่ยนสภาพเพศ.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5799
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Sex determination in the Giant fish of Amazon Basin, Arapaima gigas (Osteoglossiformes, Arapaimatidae), using laparoscopy Acta Amazonica
Carreiro,Carlos Riedel Porto; Furtado-Neto,Manuel Antônio de Andrade; Mesquita,Pedro Eymard Campos; Bezerra,Tácito Araújo.
The Giant of Amazon basin, pirarucu, Arapaima gigas, is the largest scaled freshwater fish in the world. pirarucu cultivation has recently started, driven by the decline in natural populations and high market value. Currently, there are no reliable methods for sexual differentiation in this species other than direct examination of gonads, which requires dissection of specimens. A non-lethal and less invasive method for sexual identification is highly desirable in order to properly group broodstock for mating and offspring production. We utilized laparoscopic examination in anesthetized pirarucu to differentiate between male and female individuals. This method allowed for the observation and differentiation of the reproductive organs within an individual....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arapaima gigas; Fish anesthesia; Laparoscopy; Sex differentiation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672011000300012
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Characterization of the Brain-pituitary axis in pejerrey Odontesthes bonariensis Biocell
Somoza,G.M.; Miranda,L.A.; Guilgur,L.G.; Strobl-Mazzulla,P.H..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brain; Pituitary; Reproduction; Sex differentiation.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452006000100011
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