Publikasjoner
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2025
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Forfattere
Paul Eric Aspholm Hans Geir Eiken David Kniha Snorre Hagen Runar Kjær Ida Marie Bardalen Fløistad Ingrid Helle Søvik Ane-Sofie Bednarczyk Hansen Rolf Randa Jan Helmer OlsenSammendrag
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Forfattere
Jan Phillipp Geißel Noé Espinosa-Novo Luis Giménez Nicole Aberle-Malzahn Gro Ingleid van der Meeren Ralf Rautenberger Steffen Harzsch Gabriela TorresSammendrag
Aim This study sets out to understand the variability in larval traits of dispersive life stages of a famous invader, the European shore crab Carcinus maenas, in its native distribution range. Location North East Atlantic coast from the Norwegian Arctic to the southern European distribution limit of C. maenas in Southern Spain. Taxon European shore crab Carcinus maenas (Crustacea, Decapoda). Methods We quantified latitudinal patterns in larval body mass, elemental composition (C and N content), and thermal tolerance of the first larval stage. We collected crabs from four populations spanning 25° of latitude (Vigo in Northern Spain; Bergen, Trondheim, and Bodø in Norway) and reanalysed published and unpublished data of body mass and elemental composition of additional populations from Germany, Wales, France, and Southern Spain. Furthermore, we used two laboratory experiments to test the thermal tolerance limits of the first larval stage from Vigo and the Norwegian populations. In the first experiment, we reared larvae from hatching to Zoea II at seven temperatures (9°C–27°C) and from hatching to LT50 at 6°C. In the second experiment, we exposed freshly hatched larvae acutely to increasing or decreasing temperatures (up to 40°C and down to 3°C). Results Across the entire European range, we found a substantial increase in dry mass and carbon and nitrogen content of freshly hatched larvae with latitude. Norwegian populations exhibited higher survival at 9°C than the Vigo population. Furthermore, LT50 at 6°C increased from South to North. All populations showed high survival in the range 12°C–24°C but low survival at 27°C. Main Conclusions Larval tolerance quantified by using survival to Zoea II is not clearly related to the tolerance quantified with the acute experiments, indicating that each method assesses different aspects of thermal tolerance. Tolerance to low temperature correlated positively to tolerance to high temperature, suggesting that variation among females in larval responses reflects a general physiological quality rather than trade-offs. We provide evidence for potentially adaptive variations in larval body mass and thermal tolerance across a latitudinal gradient for C. maenas.
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Paul Eric Aspholm Mikkel Meyn Liljegren Carmen Rizzo Angelina Lo Giudice Hans Geir Eiken Cornelya KlutschSammendrag
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Forfattere
Paul Eric Aspholm Carmen Rizzo Gabriella Caruso Giovanna Maimone Luisa Patrolecco Marco Termine Marco Bertolino Stefania Giannarelli Alessandro Ciro Rappazzo Josef Elster Alessio Lena Maria Papale Tanita Pescatore Jasmin Rauseo Rosamaria Soldano Francesca Spataro Maurizio Azzaro Angelina Lo GiudiceSammendrag
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Sammendrag
https://www.okologisk24.no/synspunkt/varonn-i-vinduskarmen-og-krisetid/1316882
Forfattere
Anna Birgitte MilfordSammendrag
https://www.khrono.no/ni-prosjekter-far-107-millioner-til-forskning-pa-miljo-klima-mat-og-folkehelse/911199?fbclid=IwY2xjawJo3AxleHRuA2FlbQIxMQABHhWMmmCbAcMieP8ZeLA0HMDq743F1LmAEOKMrnKI3QHe_LHW-Y5Uif_TKZkv_aem_IZtj0WrXGDqYU5QNdo3vAw