Movements of Individual Salmon (Salmo salar) in the Baltic Sea Revealed by Stable Isotopes
Kiljunen, M., Torniainen, J., Lensu, A., Keinänen, M., Vuorinen, P., Patterson, W. P. and Jones, R. (2018). Movements of Individual Salmon (Salmo salar) in the Baltic Sea Revealed by Stable Isotopes. 5th European Congress of Conservation Biology. doi: 10.17011/conference/eccb2018/108144
© the Authors, 2018
Spatial stable isotope variability (“isoscapes”) offer potential for various applications in migration ecology, wherein stable isotope values of animal tissues are compared to values measured from the environment. We used otolith oxygen (δ18O) and carbon (δ13C) stable isotope measurements to investigate seasonal movement patterns of individual Baltic Sea salmon and the migratory connectivity of one breeding population in their non-breeding areas in the Baltic Sea. Spatial variability in δ18OH2O and δ13CDIC values of the water collected around the Baltic Sea was determined to generate horizontal and vertical gridded isoscapes. Salmon individuals ascending the river to spawn were collected in early summer in four sequent years. Prior to stable isotope analysis, micro-sampling of the otolith powder was conducted using a three-dimensional micromilling system. Two selected time points from salmon otoliths, the 2nd summer in the sea and the following winter, were analysed for isotope values. The differences between summer and winter in Baltic Sea δ18OH2O values were low, whereas δ13CDIC values exhibited substantial seasonal variability. Preliminary tests of probable locations of individual salmon via spatial probability surface maps revealed that present knowledge about δ13C values is insufficient for modelling purposes. Therefore only δ18O values were used to study seasonal and annual differences in locations of individual salmon in their non-breeding areas at the sea and locations in relation to the time of ascending the spawning river. Our results indicate that during their feeding migrations salmon move considerable distances within their non-breeding area and that migratory connectivity of the breeding population varies in spatial and temporal scales, the extent of which is poorly understood in salmon ecology. We conclude that better knowledge of movements within the non-breeding areas of migratory animals is important for understanding possible drivers (e.g. resource distribution) of animal migrations. Our observations also raise concerns over how to conserve and manage populations which are continuously moving substantial distances in their non-breeding area. ...
PublisherOpen Science Centre, University of Jyväskylä
ConferenceECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland
MetadataShow full item record
- ECCB 2018 
Showing items with similar title or keywords.
Migratory connectivity amongst Baltic Sea salmon Torniainen, Jyrki (University of Jyväskylä, 2014)
Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway Dunlop, Kathy; Eloranta, Antti P.; Schoen, Erik; Wipfli, Mark; Jensen, Jenny L.A.; Muladal, Rune; Christensen, Guttorm N. (Wiley-Blackwell, 2021)Recent large influxes of non‐native Pacific pink salmon (Oncorhynchus gorbuscha) to North European rivers have raised concern over their potential negative impacts on native salmonids and recipient ecosystems. The eggs and ...
Loss of natural Baltic salmon populations can severely reduce metapopulation capacity for retaining genetic variation Kurland, Sara; Ryman, Nils; Hössjer, Ola; Laikre, Linda (Open Science Centre, University of Jyväskylä, 2018)The Atlantic salmon of the Baltic Sea is a species of high ecological importance and socioeconomic value. Historically, 94 rivers entering the Baltic Sea held wild salmon populations. Hydro-electric power plant construction ...
Effects of fumonisin B1 on performance of juvenile Baltic salmon (Salmo salar) Carrera Garcia, Erika (2013)Fumonisin B1 is a mycotoxin produced by fungi of the genus Fusarium that frequently occurs on maize (Zea mays) and feeds containing it. The use of plant-based protein sources in feeds designed for aquaculture has increased ...
Spatio-temporal differences in the growth of wild and reared Atlantic salmon (Salmo salar L.) in the Baltic Sea Peltola, Mikko (2013)Syönnösvaellus ja nopea kasvu ovat olennainen osa Atlantin lohen (Salmo salar L.) ekologiaa, niinpä kasvunopeuden selvittäminen on tärkeä osa kalatutkimusta. Tuottavimmat syönnösalueet tulisi tietää, jotta olisi mahdollista ...