Pubblicazione scientifica

Nutrients from salmon parents alter selection pressures on their offspring

FILONE TECNOLOGICO	TEMA
economia circolare e sostenibilità
produzione e cattura

RIASSUNTO

Abstract

Organisms can modify their surrounding environment, but whether these changes are large enough to feed back and alter their evolutionary trajectories is not well understood, particularly in wild populations. Here we show that nutrient pulses from decomposing Atlantic salmon (Salmo salar) parents alter selection pressures on their offspring with important consequences for their phenotypic and genetic diversity. We found a strong survival advantage to larger eggs and faster juvenile metabolic rates in streams lacking carcasses but not in streams containing this parental nutrient input. Differences in selection intensities led to significant phenotypic divergence in these two traits among stream types. Stronger selection in streams with low parental nutrient input also decreased the number of surviving families compared to streams with high parental nutrient levels. Observed effects of parent‐derived nutrients on selection pressures provide experimental evidence for key components of eco‐evolutionary feedbacks in wild populations.

DATA

Data di pubblicazione: 15/12/2017

AUTORI

AUER SONYA K
ANDERSON GRAEME J
MCKELVEY SIMON
BASSAR RONALD D
MCLENNAN DARRYL
ARMSTRONG JOHN D
NISLOW KEITH H
DOWNIE HELEN K
MCKELVEY LYNN
MORGAN THOMAS AJ
SALIN KARINE
ORRELL DANIELLE L
GAUTHEY ALICE
REID THOMAS C
METCALFE NEIL B

ENTE DI AFFERENZA

Freshwater Fisheries Laboratory Marine Scotland–Science Pitlochry PH16 5LB UK
INST BIODIVERSITY ANIMAL HEALTH & COMPARATIVE MEDICINE UNIV GLASGOW GLASGOW G12 8QQ UK
CROMARTY FIRTH FISHERY TRUST INVERNESS IV2 3HF UK
DEPT BIOLOGY WILLIAMS COLLEGE WILLIAMSTOWN MA 01267 USA
USDA FOREST SRVC NORTHERN RSCH STATION AMHERST MA 01003 USA
UNIV PIERRE & MARIE CURIE PARIS 75005 FRANCE

RIVISTA

Ecology Letters, 21(2), 287-295

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