Kootenay Lake kokanee (Oncorhynchus nerka) collapse into a predator pit

Autor:	Steven K Arndt, Joseph L. Thorley, Greg Andrusak, Tyler J Weir, Matthew D. Neufeld, Jeff A Burrows, Will G. Warnock
Rok vydání:	2022
Předmět:	Fishery Trout Recreational fishing biology Oncorhynchus Rainbow trout Aquatic Science biology.organism_classification Predator Ecology Evolution Behavior and Systematics Salvelinus
Zdroj:	Canadian Journal of Fisheries and Aquatic Sciences. 79:234-248
ISSN:	1205-7533 0706-652X
DOI:	10.1139/cjfas-2020-0410
Popis:	Kootenay Lake is a large, oligotrophic waterbody in southern British Columbia renowned for recreational fisheries for piscivorous rainbow trout (Oncorhynchus mykiss) and bull trout (Salvelinus confluentus). Long-term datasets showed an increase in large-bodied (>2 kg) piscivore abundance followed by a collapse of the kokanee (Oncorhynchus nerka) prey population in 2013 and subsequent decline of large-bodied piscivores. An unprecedented post-collapse state formed in 2015–2018, characterized by low kokanee spawner abundance and biomass and high catch rates for small-bodied (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e904c4a629e2bd4a97d8375d485284ec https://doi.org/10.1139/cjfas-2020-0410 Zobrazit plný text záznamu Plný text ve formátu PDF