Shift of spawning season and effects of climate warming on developmental stages of a grayling (Salmonidae)

Details

Ressource 1Download: 20561001postcript.pdf (454.36 [Ko])
State: Public
Version: Author's accepted manuscript
License: Not specified
Serval ID
serval:BIB_8E2347C8667A
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Shift of spawning season and effects of climate warming on developmental stages of a grayling (Salmonidae)
Journal
Conservation Biology
Author(s)
Wedekind C., Küng C.
ISSN
0888-8892
Publication state
Published
Issued date
2010
Peer-reviewed
Oui
Volume
24
Number
5
Pages
1418-1423
Language
english
Abstract
River-dwelling fish, such as European graylings (Thymallus thymallus), are susceptible to changes in climate because they can often not avoid suboptimal temperatures, especially during early developmental stages. We analyzed data collected in a 62-year-long (1948-2009) population monitoring program. Male and female graylings were sampled about three times/week during the yearly spawning season in order to follow the development of the population. The occurrence of females bearing ripe eggs was used to approximate the timing of each spawning season. In the last years of the study, spawning season was more than 3 weeks earlier than in the first years. This shift was linked to increasing water temperatures as recorded over the last 39 years with a temperature logger at the spawning site. In early spring water temperatures rose more slowly than in later spring. Thus, embryos and larvae were exposed to increasingly colder water at a stage that is critical for sex determination and pathogen resistance in other salmonids. In summer, however, fry were exposed to increasingly warmer temperatures. The changes in water temperatures that we found embryos, larvae, and fry were exposed to could be contributing to the decline in abundance that has occurred over the last 30-40 years.
Keywords
climate change, life history, monitoring, population decline, river temperature, salmonid, spawning season
Pubmed
Web of science
Open Access
Yes
Create date
26/04/2010 11:36
Last modification date
27/11/2019 7:19
Usage data