title: Historical DNA documents long-distance natal homing in marine fish.
abstract: The occurrence of natal homing in marine fish remains a fundamental question in fish ecology as its unequivocal demonstration requires tracking of individuals from fertilization to reproduction. Here, we provide evidence of long-distance natal homing (>1000 km) over more than 60 years in Atlantic cod (Gadus morhua), through genetic analysis of archived samples from marked and recaptured individuals. Using a high differentiation single-nucleotide polymorphism assay, we demonstrate that the vast majority of cod tagged in West Greenland and recaptured on Icelandic spawning grounds belonged to the Iceland offshore population, strongly supporting a hypothesis of homing. The high degree of natal fidelity observed provides the evolutionary settings for development of locally adapted populations in marine fish and emphasize the need to consider portfolio effects in marine fisheries management strategies.
authors: Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600, Silkeborg, Denmark.|Greenland Climate Research Centre, Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.
authors: Sara
authors: S
authors: Bonanomi
authors: Greenland Climate Research Centre, Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.|Hopkins Marine Station, Department of Biology, Stanford University, 120 Oceanview Blvd, Pacific Grove, CA, 93950, USA.
authors: Nina
authors: N
authors: Overgaard Therkildsen
authors: Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.
authors: Anja
authors: A
authors: Retzel
authors: Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.
authors: Rasmus
authors: R
authors: Berg Hedeholm
authors: Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Jaegersborg Allé 1, 2920, Charlottenlund, Denmark.
authors: Martin Waever
authors: MW
authors: Pedersen
authors: Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600, Silkeborg, Denmark.
authors: Dorte
authors: D
authors: Meldrup
authors: Marine Research Institute, Skúlagata 4, 101 Reykjavık, Iceland.
authors: Christophe
authors: C
authors: Pampoulie
authors: Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600, Silkeborg, Denmark.
authors: Jakob
authors: J
authors: Hemmer-Hansen
authors: Greenland Climate Research Centre, Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.|Department of Bioscience, Aarhus University, Ole Worms Allé 1, 8000, Aarhus, Denmark.
authors: Peter
authors: P
authors: Grønkjaer
authors: Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark, Vejlsøvej 39, 8600, Silkeborg, Denmark.|Greenland Climate Research Centre, Greenland Institute of Natural Resources, Kivioq 2, PO Box 570, 3900, Nuuk, Greenland.
authors: Einar Eg
authors: EE
authors: Nielsen
mesh_terms: D000823:Animal Identification Systems; D025041:Animal Migration; D000818:Animals; D004247:DNA / Q000032:analysis; D005398:Fisheries; D048389:Gadus morhua / Q000235:genetics*; D005828:Genetics, Population; D060005:Genotyping Techniques; D006116:Greenland; D006702:Homing Behavior; D007055:Iceland; D020641:Polymorphism, Single Nucleotide; D012098:Reproduction
chemical_list: D004247:DNA
keywords: historical DNA; marine fish; natal homing; tagging data