Otterly delicious: Spatiotemporal variation in the diet of a recovering population of Eurasian otters (
Eurasian otter
dietary variation
fecal analysis
food webs
hard parts analysis
trophic interactions
Journal
Ecology and evolution
ISSN: 2045-7758
Titre abrégé: Ecol Evol
Pays: England
ID NLM: 101566408
Informations de publication
Date de publication:
May 2023
May 2023
Historique:
received:
09
01
2023
revised:
21
03
2023
accepted:
03
04
2023
medline:
14
5
2023
pubmed:
14
5
2023
entrez:
14
5
2023
Statut:
epublish
Résumé
Eurasian otters are apex predators of freshwater ecosystems and a recovering species across much of their European range; investigating the dietary variation of this predator over time and space, therefore, provides opportunities to identify changes in freshwater trophic interactions and factors influencing the conservation of otter populations. Here we sampled feces from 300 dead otters across England and Wales between 2007 and 2016, conducting both morphological analyses of prey remains and dietary DNA metabarcoding. Comparison of these methods showed that greater taxonomic resolution and breadth could be achieved using DNA metabarcoding but combining data from both methodologies gave the most comprehensive dietary description. All otter demographics exploited a broad range of taxa and variation likely reflected changes in prey distributions and availability across the landscape. This study provides novel insights into the trophic generalism and adaptability of otters across Britain, which is likely to have aided their recent population recovery, and may increase their resilience to future environmental changes.
Identifiants
pubmed: 37181211
doi: 10.1002/ece3.10038
pii: ECE310038
pmc: PMC10170393
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e10038Informations de copyright
© 2023 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.
Déclaration de conflit d'intérêts
The authors have no competing interests to declare.
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