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Titolo:
Medaka (Oryzias latipes) as a model for hypoosmoregulation of euryhaline fishes
Autore:
Sakamoto, T; Kozaka, T; Takahashi, A; Kawauchi, H; Ando, M;
Indirizzi:
Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, JapanHiroshima Univ Higashihiroshima Japan 7398521 hihiroshima 7398521, Japan Kitasato Univ, Sch Fisheries Sci, Sanriku, Iwate 0220101, Japan Kitasato Univ Sanriku Iwate Japan 0220101 , Sanriku, Iwate 0220101, Japan
Titolo Testata:
AQUACULTURE
fascicolo: 3-4, volume: 193, anno: 2001,
pagine: 347 - 354
SICI:
0044-8486(20010215)193:3-4<347:M(LAAM>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
TILAPIA OREOCHROMIS-MOSSAMBICUS; BRANCHIAL CHLORIDE CELLS; FRESH-WATER; SEAWATER ADAPTATION; GROWTH-HORMONE; GILL EPITHELIUM; TELEOST FISH; SALMO-TRUTTA; SEA BASS; TRANSPORT;
Keywords:
osmoregulation; cortisol; prolactin; chloride cell; medaka; Oryzias latipes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Sakamoto, T Hiroshima Univ, Fac Integrated Arts & Sci, 1-7-1 Kagamiyama, Higashihiroshima 7398521, Japan Hiroshima Univ 1-7-1 Kagamiyama Higashihiroshima Japan 7398521
Citazione:
T. Sakamoto et al., "Medaka (Oryzias latipes) as a model for hypoosmoregulation of euryhaline fishes", AQUACULTURE, 193(3-4), 2001, pp. 347-354

Abstract

We examined the hypoosmoregulatory ability of a model fish, medaka (Oryzias latipes), in relation to the gill-chloride cells or mitochondrion-rich (MR) cells, and to cortisol. When the medaka were transferred from freshwater(FW) to 30 parts per thousand seawater (SW), muscle water content decreased by 8% after 2 h and normalized within 1 week. Size and density of MR cells in the gill filament increased after 1-2 weeks in SW. Immersion of medakain FW containing cortisol(10 mug/ml) for 1-2 weeks also doubled the numberof MR cells. and abolished the decrease in muscle water content after SW transfer. In SW-adapted medaka, prolactin (PRL, 10 mug/g body weight) injection reduced muscle water content. However, when cortisol (50 mug/g) was injected simultaneously with PRL, cortisol abolished the decrease in muscle water. We concluded that cortisol plays an important role in the SW adaptation of the medaka, whereas PRL may be involved in ion uptake. Medaka seems tobe a good model fish useful for the study of osmoregulatory mechanisms in general. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 03:46:18