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Titolo:
The time-course change of nitrogenous excretion in the Kuruma shrimp Penaeus japonicus following nitrite exposure
Autore:
Cheng, SY; Chen, JC;
Indirizzi:
Natl Taiwan Ocean Univ, Dept Aquaculture, Chilung 202, Taiwan Natl Taiwan Ocean Univ Chilung Taiwan 202 uaculture, Chilung 202, Taiwan
Titolo Testata:
AQUATIC TOXICOLOGY
fascicolo: 4, volume: 51, anno: 2001,
pagine: 443 - 454
SICI:
0166-445X(200102)51:4<443:TTCONE>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACID-BASE-BALANCE; AMMONIA EXCRETION; AMBIENT AMMONIA; ASTACUS-ASTACUS; ION REGULATION; HEMOLYMPH; ELECTROLYTE; HEMOCYANIN; CRAYFISH; PROTEIN;
Keywords:
Penaeus japonicus; nitrite; ammonia-N excretion; urea-N excretion; organic-N excretion; hemolymph ammonia; hemolymph urea;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Chen, JC Natl Taiwan Ocean Univ, Dept Aquaculture, Chilung 202, Taiwan Natl Taiwan Ocean Univ Chilung Taiwan 202 , Chilung 202, Taiwan
Citazione:
S.Y. Cheng e J.C. Chen, "The time-course change of nitrogenous excretion in the Kuruma shrimp Penaeus japonicus following nitrite exposure", AQUAT TOX, 51(4), 2001, pp. 443-454

Abstract

Penaeus japonicus (12.83 +/- 1.24 g) which were exposed individually to 0.002 (control), 0.076, 0.362, 0.719 and 1.433 mM nitrite at 30 ppt of salinity were examined for hemolymph ammonia, urea and nitrite, and nitrogenous excretion after 3, 6, 12, 24 and 48 h, respectively. Hemolymph nitrite and hemolymph urea increased directly with ambient nitrite and exposure time, whereas hemolymph ammonia was inversely related to ambient nitrite and exposure time. Specific excretions of total-N (total nitrogen), ammonia-N, urea-pi and organic-N (organic nitrogen) increased directly with ambient nitrite and exposure time. The contribution of ammonia-N excretion and urea-N excretion in the total-N excreted by the control shrimp was 41.7-90.8 and 2.8-10.5%, respectively. The contribution of ammonia-N in the total-N excreted byP. japonicus decreased to 10.0 and 3.8%, when they were exposed for 24 h to 0.076 and 1.433 mM nitrite, respectively. The contribution of urea-N excretion increased to 58.7 and 21.4%, and the organic-N excretion increased to31.3 and 74.8% in the total-N excreted by the shrimp following 24 h exposure to 0.076 and 1.433 mM nitrite, respectively. It was concluded that P. japonicus following 24 h exposure to nitrite as low as 0.076 mM increased itsammonia-N excretion by a factor of 1.9, its urea-N excretion by 200, and its organic-N excretion by 37, as compared to those in the control solution. (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 23:37:56