Examination of two new technologies to assess the diet of woodland caribou: video recorders attached to collars and DNA barcoding
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Post-publication record
- Nature
- Retraction
- Reason
- Concerns/Issues about Data;Objections by Author(s);Original Data and/or Images not Provided and/or not Available;Results Not Reproducible;Unreliable Results and/or Conclusions;Upgrade/Update of Prior Notice(s);
- Date
- 3/14/2023 0:00
- Flagged by OpenAlex?
- Yes
Source: Retraction Watch, joined by DOI. OpenAlex records retraction as is_retracted, a boolean over a state space with at least four values, so it cannot express an expression of concern, a correction or a reinstatement — it reports them as false, which reads as “fine”.
Abstract
The diet of woodland caribou (Rangifer tarandus caribou Gmelin, 1788) in the boreal zone of North America is poorly understood. In large part this is because they occur at low densities in environments that are difficult to access. The only method available for identifying food requirements of wildlife has been histological examination of fecal samples, a technique that suffers from a number of serious limitations. Our study used fecal samples from 125 woodland caribou and animal-borne videos to address two questions: (1) How do the new technologies, video cameras and DNA barcoding, compare with conventional diet analyses of fecal pellets? and (2) Can these techniques be used to determine the diet of woodland caribou? Our results show that microhistology estimates provide an inaccurate approximation of diet; <15% correlation with either barcoding or video techniques. Taxonomic resolution of the histology estimates was very low. Taxonomic resolution to species found in fecal samples was good using video (42%) but better using DNA barcoding (94%). DNA barcoding and video technologies provided dietary data that were highly correlated (70%) among major groups of plants, with terrestrial lichens dominating the late winter through early spring diet. The high species resolution of DNA barcoding may be supplemented by information on habitat preference and degree of feeding selectivity obtained by video surveillance. These novel technologies may be important tools for identifying critical habitat requirements and associated conservation strategies needed for elusive wildlife species that are endangered.
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The record
- Venue
- Canadian Journal of Forest Research
- Topic
- Environmental DNA in Biodiversity Studies
- Field
- Environmental Science
- Canadian institutions
- Ministry of Natural Resources and ForestryCanadian Forest ServiceUniversity of Guelph
- Funders
- Canadian Forest ServiceNatural Sciences and Engineering Research Council of CanadaOntario Genomics InstituteGenome Canada
- Keywords
- Woodland caribouDNA barcodingWoodlandBiologyGeographyEcologyEnvironmental sciencePredation
- Has abstract in OpenAlex
- yes