Elimination of adhesiveness in eggs from the white sturgeon, Acipenser transmontanus: Chemical treatment of fertilized eggs
1986; Elsevier BV; Volume: 55; Issue: 2 Linguagem: Inglês
10.1016/0044-8486(86)90068-2
ISSN1873-5622
AutoresG.V. Kowtal, Wallis H. Clark, Gary N. Cherr,
Tópico(s)Aquaculture Nutrition and Growth
ResumoChemical elimination of the adhesive jelly coat in live Acipenser transmontanus eggs was investigated. Following fertilization, urea/sodium chloride (NaCl) or sodium sulphite (Na2SO3) treatment followed by a tannic acid wash, successfully removed the adhesive layer. In hatchery incubators, urea/NaCl-tannic acid treatment resulted in an increase in the number of hatched larvae over Na2SO3-tannic acid treatment. This treatment resulted in a hatch at least as great as silt-treated control eggs. The decrease in manual labor and time required for de-adhesion of sturgeon eggs as well as the high percentage of hatched larvae indicate that the urea/NaCl treatment is superior to the manual silting method.
Referência(s)