Tide gates form physical and ecological obstacles to river herring (Alosa spp.) spawning migrations

Autor:	Christopher B. Rillahan, Theodore Castro-Santos, Elsa Goerig, Derrick Alcott, Pingguo He
Rok vydání:	2021
Předmět:	Fishery Fish migration Alosa food.ingredient food Geography geography.geographical_feature_category Herring Spring (hydrology) Aquatic Science Spawn (biology) Ecology Evolution Behavior and Systematics
Zdroj:	Canadian Journal of Fisheries and Aquatic Sciences. 78:869-880
ISSN:	1205-7533 0706-652X
DOI:	10.1139/cjfas-2020-0347
Popis:	River herring (Alosa spp.) are anadromous fish that enter North American Atlantic coastal rivers and lakes each spring to spawn. Anthropogenic structures such as dams and tide gates serve as physical obstacles that limit river herring access to spawning habitat. This study examined the physical and ecological components affecting herring passage through a tide gate by applying a time-to-event analysis framework to multiple movement behaviors derived from telemetry data. Herring had higher passage success early in the season (78%) than later (16%). Key behaviors that govern passage varied with diel period, tide, and flow direction through the gates. Furthermore, these behaviors shifted as the season progressed, consistent with the hypothesis that predator avoidance may be driving passage failure late in the spawning season.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a340712e5befc6dedc06882328c935d https://doi.org/10.1139/cjfas-2020-0347 Zobrazit plný text záznamu Plný text ve formátu PDF