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Registros recuperados: 8
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Cryopreservation of semen from functional sex-reversed genotypic females of the rainbow trout, Oncorhynchus mykiss BABT
Ninhaus-Silveira,Alexandre; Foresti,Fausto; Tabata,Yara Aiko; Rigolino,Marcos Guilherme; Veríssimo-Silveira,Rosicleire.
Cryopreservation of semen from sex-reversed females of rainbow trout aims at rationalizing the production of stocks composed by 100% females. Semen from normal males (M) and two types of genotypic females (R and G), sex-reversed by the oral administration of 17alpha-methyltestosterone, were used. R was obtained by the fertilization of normal eggs with semen of sex-reversed females while G via gynogenetic reproduction. Semen was diluted in an extender solution (glucose 5,4 g, egg yolk 10 ml, dimetil sulfoxide 10 ml, water 80 ml) at 1:3 ratio (semen/extender), stored in straws of 0.5 ml and freezed in a dry container Cryopac CP-65, at -180ºC. Thawing was performed with water at 70ºC for 3 seconds. There were no significant fertilization rate differences...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oncorhynchus mykiss; Cryopreservation; Sex reversal; Gynogenesis; Semen.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100009
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Growing knowledge and understanding of dichromatism and sex reversal in Labridae Naturalis
Roede, Machteld J..
A brief survey is given of current literature in comparison with former studies. Since the 18th century phenotypic diversity of Labridae is a matter of argument. At first in dribs and drabs, yet last decades at a rapid rate, dichromatic adult morphs are synonymized. There are few monochromatic species. Wrasses are protogynous hermaphrodites. Most species are described as monandric, but a minority (of slightly or extremely dichromatic) species is diandric, with both primary and secondary males. Terminal males reproduce with single females, but initial phase males spawn in aggregations. Some species are haremic, and large males are permanently or temporarily territorial. Last decades insight in the various social factors has greatly increased, resulting in...
Tipo: Article / Letter to the editor Palavras-chave: Sex reversal; Hermaphroditism; Diandry; Monandry; Sex dimorphism; Color changes; Sexual behavior; Labridae.
Ano: 1990 URL: http://www.repository.naturalis.nl/record/504233
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Growth of Nile tilapia post-larvae from broodstock fed diet with different levels of digestible protein and digestible energy R. Bras. Zootec.
Sousa,Silia Maria de Negreiros; Freccia,André; Santos,Lilian Dena dos; Meurer,Fábio; Tessaro,Lucélia; Bombardelli,Robie Allan.
This study was carried out to evaluate the influence of different levels of digestible energy and digestible protein in diets of Nile tilapia (Oreochromis niloticus) broodstock on offspring growth during sex reversal stage. A total of 2,700 post-larvae (8.2±0.001 mg) derived from breeders fed nine diets with distinct levels of digestible protein (28, 34 and 40% DP) and digestible energy (2,800; 3,400; and 4,000 kcal DE.kg-1) were stored in twenty-seven 70 L tanks. After 30 days of growth, their average final weight (AFW, g), average weight gain (AWG, g), final standard length (SL, cm), condition factor (CF), specific growth rate (SGR, %/day), stock uniformity (UNI, %), survival (SUR, %) and sex reversal rate (SRR, %) were measured. Although female...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fry; Nutrition; Oreochromis niloticus; Reproduction; Sex reversal.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800001
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Morphological and cytological aspects of sex inversion in a protogynous hermaphrodite, Epinephelus microdon (Teleostei, Serranidae). ArchiMer
Brusle, S; Debas, L; Cauty, C.
The sexuality of the grouper Epinephelus microdon , caught by diving in the area of Tahiti Island, from January 1986 to March 1987, is investigated. Small specimens are females, males occur among the largest fishes, revealing the protogyny of Epinephelus microdon as in other Epinephelinae. Nineteen fishes among 233 samples studied are in sex inversion.
Tipo: Text Palavras-chave: Epinephelus microdon; Ovaries; Sperm; Spermatogenesis; Females; Males; Sexual cells; Spawning; Cytology; Animal morphology; Sex reversal; Sex determination.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1440.pdf
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Mutations in the SRY, DAX1, SF1 and WNT4 genes in Brazilian sex-reversed patients BJMBR
Domenice,S.; Corrêa,R.V.; Costa,E.M.F.; Nishi,M.Y.; Vilain,E.; Arnhold,I.J.P.; Mendonca,B.B..
In most mammals, male development is triggered by the transient expression of the SRY gene, which initiates a cascade of gene interactions ultimately leading to the formation of a testis from the indifferent fetal gonad. Mutation studies have identified several genes essential for early gonadal development. We report here a molecular study of the SRY, DAX1, SF1 and WNT4 genes, mainly involved in sexual determination, in Brazilian 46,XX and 46,XY sex-reversed patients. The group of 46,XX sex-reversed patients consisted of thirteen 46,XX true hermaphrodites and four 46,XX males, and was examined for the presence of the SRY gene and for the loss of function (inactivating mutations and deletions) of DAX1 and WNT4 genes. In the second group consisting of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sex reversal; SRY gene; DAX1 gene; SF1 gene; WNT4 gene.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000100020
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Populações monosexo em peixes nativos brasileiros: iniciando o futuro. Repositório Alice
O'SULLIVAN, F. L. A.; REIS, V. R.; MORAIS, I. da S. de.
Monosex population in Brazilian native fish: the start of the future. Técnicas de controle e manipulação do sexo fenotípico têm sido amplamente utilizadas na piscicultura mundial (como atividade pecuária) e em estudos científicos acerca da fisiologia reprodutiva de peixes. A indução do sexo desejado é possível graças à alta flexibilidade do processo de diferenciação sexual de peixes e seus variados sistemas de determinação sexual. Atualmente, são produzidas populações monosexo em mais de 20 espécies de peixes de importância comercial em diferentes países. Se nos países mais avançados a produção monosexuada de peixes já é prática consolidada, no Brasil a única espécie produzida comercialmente em lotes monosexo é africana (tilápia Nilótica), ou seja,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Inversão sexual; Piscicultura; Aquaculture; Sex reversal.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118494
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The sexuality of cultured hermaphroditic fish species: Analysis of morphological and endocrinological features in a protogynous hermaphrodite, Epinephelus microdon , as a basis for further research to control reproduction in the grouper ArchiMer
Debas, L; Fostier, A; Fuchs, Jacques; Weppe, M; Nedelec, Georges; Benett, A; Cauty, C; Jalabert, B.
The Polynesian grouper, Epinephelus microdon , was chosen as an experimental model in order to investigate about factors controlling sexuality in groupers.
Tipo: Text Palavras-chave: French Polynesia; Epinephelus microdon; Sex ratio; Sexual maturity; Sex hormones; Sex determination; Sex; Fish culture; Endocrinology; Reproduction; Sex reversal; Animal morphology.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1439.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
Registros recuperados: 8
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