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Titolo:
Effects of immersion of larvae in oestradiol-17 beta on feminization, structural changes of gonad and growth performance in the Far Eastern catfish Silurus asotus (Linnaeus)
Autore:
Kim, DS; Cho, HJ; Bang, IC; Choi, GC; Nam, YK;
Indirizzi:
Pukyong Natl Univ, Dept Aquaculture, Pusan 608737, South Korea Pukyong Natl Univ Pusan South Korea 608737 re, Pusan 608737, South Korea Soonchunhyang Univ, Dept Biol Sci, Asan 336745, South Korea Soonchunhyang Univ Asan South Korea 336745 Sci, Asan 336745, South Korea Inland Fisheries Res Inst Chung Buk, Chungbuk 380250, South Korea Inland Fisheries Res Inst Chung Buk Chungbuk South Korea 380250 th Korea Pukyong Natl Univ, Res Ctr Ocean Ind Dev, Pusan 608737, South Korea Pukyong Natl Univ Pusan South Korea 608737 ev, Pusan 608737, South Korea
Titolo Testata:
AQUACULTURE RESEARCH
fascicolo: 5, volume: 32, anno: 2001,
pagine: 323 - 328
SICI:
1355-557X(200105)32:5<323:EOIOLI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SEX REVERSAL; DICENTRARCHUS-LABRAX; MISGURNUS-MIZOLEPIS; 17-ALPHA-METHYLTESTOSTERONE; ESTRADIOL-17-BETA; BASS;
Keywords:
Silurus asotus (Linnaeus); feminization; immersion; oestradiol-17 beta;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, DS Pukyong Natl Univ, Dept Aquaculture, Pusan 608737, South Korea Pukyong Natl Univ Pusan South Korea 608737 n 608737, South Korea
Citazione:
D.S. Kim et al., "Effects of immersion of larvae in oestradiol-17 beta on feminization, structural changes of gonad and growth performance in the Far Eastern catfish Silurus asotus (Linnaeus)", AQUAC RES, 32(5), 2001, pp. 323-328

Abstract

Immersion of 1-day-old Silurus asotus (Linnaeus) larvae in 50, 100 or 200 mug L-1 oestradiol-17 beta for 15 days altered gonad differentiation and gonadal morphology. The survival of the group immersed at the highest dose (280 mug L-1) was reduced significantly (86%), whereas survival of the groupsimmersed at the lower doses was as high as that of untreated controls (94%). The sex ratio of the untreated group was close to 1:1 (female-male): however, the incidence of females was significantly higher in groups immersed in doses of 50, 100 and 200 mug L-1, i.e. 86%, 92% and 99.4%, respectively. Ovarian morphology of feminized individuals was different to that of the controls: the ovary was morphologically rather similar to testis although itcontained fully matured oocytes. Morphological changes in genital organs were also noted in fish exposed to oestradiol-17 beta; the shape and size ofgenital papilla were intermediate between those of normal male and female. During a 4-month growth trial after the exposure, the feminized fish skewed significantly improved growth performance or er normal genetic males (P <0.05), although the growth was not equal to that of normal genetic females(P < 0.05).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 12:50:55