Population structure, life cycle, and trophic niche of the glacial relict amphipod, Gammaracanthus lacustris, in a large boreal lake
Salonen, J. K., Hiltunen, M., Figueiredo, K., Paavilainen, P., Sinisalo, T., Strandberg, U., Kankaala, P., & Taskinen, J. (2019). Population structure, life cycle, and trophic niche of the glacial relict amphipod, Gammaracanthus lacustris, in a large boreal lake. Freshwater Biology, 64(12), 2176-2188. https://doi.org/10.1111/fwb.13404
Published inFreshwater Biology
DisciplineAkvaattiset tieteetAquatic Sciences
© 2019 John Wiley & Sons Ltd.
Ecology of the glacial relict macrocrustacean Gammaracanthus lacustris, a rare inhabitant of deep Fennoscandian lakes, is poorly understood. We studied the life cycle and trophic position of this cold‐stenothermic amphipod in Lake Paasivesi, eastern Finland. The study is based on intensive sampling and analyses of fatty acid composition as well as stable carbon (δ13C) and nitrogen (δ15N) isotope ratios. Both day and night, the G. lacustris population occurred at depths below 25 m at temperatures <8°C, and the density increased towards the bottom of the lake, where it was 0.4–0.6 individuals/m3. Gammaracanthus lacustris was observed to reach a length of >40 mm and live up to 4 years. The oldest and the largest individuals and females seemed to favour the deepest zones. In October, almost 100% of females with length at least 25 mm (i.e. females presumably at least 1‐year‐old) had an embryo sack with 20–200 eggs or embryos—the larger the female, the more young it had. The developing eggs of G. lacustris had a very high fatty acid content, indicating that the females invest heavily on provisioning their young. Furthermore, the fatty acid composition differed among life stages, and in particular the eggs had a higher proportion of eicosapentaenoic acid than juveniles or adults. The stable δ13C and δ15N isotope ratios and fatty acid biomarkers of the food web, together with visual observations, indicate that G. lacustris is a carnivore that feeds mainly on zooplankton and other relict macrocrustaceans. Due to its high content of essential polyunsaturated fatty acids, G. lacustris is a valuable prey for fish and other predators in the food web. However, as a glacial relict with strict habitat requirements the species is vulnerable to global warming and local environmental changes. These facts should be considered in the management of lakes and their catchments. ...
PublisherWiley-Blackwell Publishing Ltd.
ISSN Search the Publication Forum0046-5070
Publication in research information system
MetadataShow full item record
Additional information about fundingElma, Eino & Veikko Jumppanen Foundation; Raija & Ossi Tuuliainen Foundation; Olvi Foundation; Oscar Öflunds Stiftelse; Suomen Akatemia, Grant/Award Number: 139786; Sociestas Biologica Fennica Vanamo; Emil Aaltosen Säätiö
Showing items with similar title or keywords.
Jättikatkan (Gammaracanthus lacustris) ja jäännehalkoisjalkaisen (Mysis relicta) koko- ja tiheysjakaumat Saimaan Paasivedellä; Vertical size and density distributions of Gammaracanthus lacustris and Mysis relicta in Paasivesi, Lake Saimaa Salonen, Jouni; Fiqueiredo, Kaisa; Taskinen, Jouni (Itä-Suomen yliopisto, 2010)The ecology of relict crustaceans in Finnish lakes is quite poorly known. In this study we investigated the vertical distributions of these species in Lake Saimaa in the depth zones between 30 m and 60 m. We found out that ...
Selective Fatty Acid Retention and Turnover in the Freshwater Amphipod Pallaseopsis quadrispinosa Taipale, Sami J.; Kers, Erwin; Peltomaa, Elina; Loehr, John; Kainz, Martin J. (MDPI, 2021)Gammarid amphipods are a crucial link connecting primary producers with secondary consumers, but little is known about their nutritional ecology. Here we asked how starvation and subsequent feeding on different nutritional ...
Diet and trophic niche of the invasive signal crayfish in the first invaded Italian stream ecosystem Ercoli, Fabio; Ghia, Daniela; Gruppuso, Laura; Fea, Gianluca; Bo, Tiziano; Ruokonen, Timo J. (Nature Publishing Group, 2021)The occurrence of the signal crayfish Pacifastacus leniusculus in the Valla Stream was the first established population of this invasive species recorded in an Italian stream ecosystem. We evaluated the seasonality of diet ...
Makroäyriäisten (Gammaracanthus lacustris, Mysis relicta, Monoporeia affinis, Pallaseopsis quadrispinosa) vuorokausivaellukset Saimaan Paasivedellä; Diel vertical migrations of the macroscopic crustaceans Gammaracanthus lacustris, Mysis relicta, Monoporeia affinis and Pallaseopsis quadrispinosa in Lake Paasivesi, Saimaa Sjönberg, Tuomo; Valta, Otso; Salonen, Jouni; Figueiredo, Kaisa; Taskinen, Jouni (Itä-Suomen yliopisto, 2010)We examined the diel vertical migrations of the macroscopic pelagic relict crustaceans Gammaracanthus lacustris, Mysis relicta, Monoporeia affinis and Pallaseopsis quadrispinosa in the deep Lake Paasivesi basin of the ...
Growth and population structure of perch in relation to diet in a small humic lake, Valkea-Kotinen Afolabi, Abideen (2011)Lake Valkea-Kotinen is a long-term ecological monitoring site in the Evo region of southern Finland .The aim of this study was to investigate the growth and population structure of perch (Perca fluviatilis L.) in relation ...