Brook trout (Salvelinus fontinalis) embryo habitat and timing of alevin emergence in a lake and a stream

Autor:	J. M. Gunn, E. J. Snucins, R. Allen Curry
Rok vydání:	1992
Předmět:	Fishery Trout biology Fontinalis Habitat Ecology Fish Upwelling Animal Science and Zoology Embryo biology.organism_classification Ecology Evolution Behavior and Systematics Salvelinus
Zdroj:	Canadian Journal of Zoology. 70:423-427
ISSN:	1480-3283 0008-4301
Popis:	We assessed redd characteristics of brook trout in a lake and a stream and alevin emergence in the lake. Both populations spawned over upwelling groundwater. In the lake site fish deposited eggs 7–19 cm in the sediment in an egg pocket that contained large-particle substrate. A similar vertical distribution of eggs (16–20 cm) and substrate occurred in the stream; however, in addition to the digging action of the female, the flow conditions in the stream appeared to produce coarser surface sediment conditions. Groundwater offered a high concentration of dissolved oxygen and, relative to lake water, less variable temperature and pH regimes for incubating eggs. Alevin emergence extended over a 71-day period, coinciding with the spring thaw and an episodic pH depression.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1067d3432bf3ec02b160a05b6fe1b6b5 https://doi.org/10.1139/z92-064 Zobrazit plný text záznamu