'Old' DNA ups odds of salmon survival

• Autores: Aylin Woodward
• Localización: New scientist, ISSN 0262-4079, Nº. 3136, 2017, pág. 10
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • In the spring of 2013, Darryl McLennan at the University of Glasgow, UK, and his colleagues tagged over 1800 juvenile salmon, or smolts, in the Blackwater river in northern Scotland just before they migrated to the sea. The team also took a small fin tissue sample from each fish to measure the telomeres. In the autumn of 2014 and 2015, when McLennan expected the salmon to return to the river to spawn, his team trapped the tagged fish and took a follow-up fin tissue sample to measure telomere length. They only managed to catch 21 of the original salmon and the survivors were more likely to have set out on their migration with shorter telomeres.