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Titolo:
CHANGES IN OSMOTIC AND IONIC CONCENTRATIONS IN THE HEMOLYMPH OF MACROBRACHIUM-ROSENBERGII EXPOSED TO VARYING SALINITIES AND CORRELATION TO IONIC AND CRYSTALLINE COMPOSITION OF THE CUTICLE
Autore:
WILDER MN; IKUTA K; ATMOMARSONO M; HATTA T; KOMURO K;
Indirizzi:
MINIST AGR FORESTRY & FISHERIES,JAPAN INT RES CTR AGR SCI,1-2 OHWASHITSUKUBA IBARAKI 3058686 JAPAN NATL RES INST AQUACULTURE,NIKKO BRANCH NIKKO TOCHIGI 3211661 JAPAN UNIV TSUKUBA,INST GEOSCI TSUKUBA IBARAKI 3058571 JAPAN
Titolo Testata:
Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
fascicolo: 4, volume: 119, anno: 1998,
pagine: 941 - 950
SICI:
1095-6433(1998)119:4<941:CIOAIC>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
CALCITONIN-LIKE IMMUNOREACTIVITY; OLFERSII WIEGMANN CRUSTACEA; CRAB CALLINECTES-SAPIDUS; BLUE-CRAB; MOLT CYCLE; ATPASE ACTIVITY; DECAPODA; SHRIMP; CALCIUM; MINERALIZATION;
Keywords:
CALCITE; CALCIUM CARBONATE; CARAPACE; ALPHA-CHITIN; CUTICLE; IONIC REGULATION; OSMOREGULATION; PRAWNS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
M.N. Wilder et al., "CHANGES IN OSMOTIC AND IONIC CONCENTRATIONS IN THE HEMOLYMPH OF MACROBRACHIUM-ROSENBERGII EXPOSED TO VARYING SALINITIES AND CORRELATION TO IONIC AND CRYSTALLINE COMPOSITION OF THE CUTICLE", Comparative biochemistry and physiology. Part A, Molecular & integrative physiology, 119(4), 1998, pp. 941-950

Abstract

Osmotic and ionic regulatory ability were examined in the giant freshwater prawn, Macrobrachium rosenbergii in response to varying salinities. In freshwater, and under conditions of low salinity, hemolymph osmolality was maintained around 450 mOsm. Under high salinity, osmolality values increased in a time-wise manner until reaching levels of the surrounding rearing water. Changes in sodium concentration generally paralleled osmotic change, and potassium and magnesium concentrations increased upon exposure to extremely high salinity. In contrast, total calcium concentration was maintained at high levels regardless of salinity treatment. Examination of crystalline structure and ionic composition of the cuticle revealed that it was comprised principally of an a-chitin-like material, and calcite (calcium carbonate). Calcite accounted for 25% of total bulk weight in freshwater, while sodium, potassium and magnesium constituents combined comprised less than 2.5% of thistotal. Although sodium, potassium and magnesium contents increased nearly 2-fold in response to changing salinity, calcium levels remained relatively constant. (C) 1998 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 04:01:10