Excretion of ammonia and urea during development in the oyster toadfish,Opsanus tau

Autor:	Robert W. Griffith, Bruce J. Stephen
Rok vydání:	2001
Předmět:	Oyster toadfish biology Physiology Hatching Aquatic Science Oceanography biology.organism_classification Excretion Ammonia chemistry.chemical_compound Animal science chemistry Biochemistry Osmoregulation Urea Metabolic waste Toadfish
Zdroj:	Marine and Freshwater Behaviour and Physiology. 34:257-264
ISSN:	1029-0362 1023-6244
Popis:	The oyster toadfish is one of several teleosts that has been found to produce and excrete large amounts of nitrogenous waste as urea. To clarify the role of urea in the oyster toadfish, urea and ammonia excretion rates were examined in developing fish. Ammonia and urea excretion rates were measured for groups of developing toadfish for three days a week over eight weeks of development. A distinct and significant increase in the excretion rate of urea occurred between the first three weeks (mean = 0.38 mg N/kg‐h) and the fourth through sixth and eighth week of development (mean = 4.68 mg N/kg‐h). This increase of urea excretion occurs at the time of hatching and may be important during development. Preliminary analysis (temperature, pH and salinity) was conducted on water at one toadfish nesting site to provide insight into conditions to which toadfish are exposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3efd12af7ca13d33cb1e66c5900bd35f https://doi.org/10.1080/10236240109379079 Zobrazit plný text záznamu