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Title: Haemolymph osmolality, acid-base balance and shift of ammonotelic to ureotelic excretory pattern of Penaeus japonicus exposed to ambient ammonia
Authors: Jiann-Chu Chen
Sha-Yen Cheng
Contributors: 國立臺灣海洋大學:環境生物與漁業科學學系
Date: 1993-11
Issue Date: 2016-12-26T07:50:43Z
Publisher: Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology
Abstract: Abstract:1. Urea-N and nitrite-N excretions of Penaeus japonicus (11.70 ± 2.30 g) increased, but ammonia-N excretion decreased with increased ambient ammonia-N, as they were exposed individually to 0.055 (control), 1.011, 5.121, 10.032 and 20.335 mg/l ammonia-N after 24 hr.
2. Haemolymph pH, PCO2 and osmolality of shrimp displayed an inverse linear relationship with concentration of ambient ammonia-N.
3. Shrimp exposed to 10.032 mg/l ammonia-N after 24 hr significantly affected (P < 0.05) haemolymph PCO2 and osmoregulatory capacity.
4. Accumulated ammonia-N in the haemolymph of shrimp following exposure to ambient ammonia-N at 5.121 mg/l or greater caused a shift from an ammonotelic to a ureotelic pattern, and may cause catabolism of hemocyanin and protein to free amino acids to balance osmoregulation.
Relation: 106(3), pp.733-737
Appears in Collections:[Department of Environmental Biology and Fisheries Science] Periodical Articles

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