title: The susceptibility of early developmental phases of an acid-tolerant and acid-sensitive fish species to acidity and aluminum.
abstract: The mortality of roach (Rutilus rutilus) embryos increased during the early embryonic phase following exposure to Al and acidity from pH 6.7 to 5.0. No roach hatched at pH<5.00 or at pH 5.00 in the presence of Al. By contrast, increased embryonic mortality in pike (Esox lucius) occurred mainly during and after the normal hatching period due to the acidity-dependent prolongation and inhibition of hatching at pH 4.00. Newly hatched fry of both species were more sensitive to Al than the embryos. A reduction in the development of yolk-sac fry occurred in pike at pH 4.00 and in roach at pH 5.00, and in the presence of Al at pH< or =5.00 and pH< or =5.75, respectively. Thus, the most susceptible early developmental phase to acidity differed between the acid-sensitive roach and the acid-tolerant pike, although the newly hatched fry was the developmental phase most sensitive to Al for both species.
authors.affiliation: Finnish Game and Fisheries Research Institute, P.O. Box 6, FI-00721 Helsinki, Finland. marja.keinanen@rkti.fi
authors.forename: Marja
authors.initials: M
authors.lastname: Keinänen
authors.forename: Christina
authors.initials: C
authors.lastname: Tigerstedt
authors.forename: Seppo
authors.initials: S
authors.lastname: Peuranen
authors.forename: P J Pekka J
authors.initials: PJ
authors.lastname: Vuorinen
mesh_terms: D000143:Acids / Q000633:toxicity*; D000535:Aluminum / Q000737:chemistry / Q000633:toxicity*; D000818:Animals; D003530:Cyprinidae / Q000196:embryology / Q000254:growth & development / Q000502:physiology*; D004361:Drug Tolerance; D004625:Embryo, Nonmammalian / Q000187:drug effects; D017859:Esocidae / Q000196:embryology / Q000254:growth & development / Q000502:physiology*; D005618:Fresh Water / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D009026:Mortality; D010063:Ovum / Q000187:drug effects; D012098:Reproduction / Q000187:drug effects*; D013550:Swimming
chemical_list: D000143:Acids; D000535:Aluminum