Chronic Sublethal Injury in a Critically Endangered Flapper Skate ( Dipturus intermedius ): In Situ Observations Compatible With Trawl Capture

ABSTRACT Sublethal effects of bycatch in elasmobranchs are typically assessed using short‐term survival metrics, yet post‐release pathology remains poorly documented. We report in situ observations of a flapper skate ( Dipturus intermedius ) in the northeast Atlantic exhibiting skeletal and soft‐tissue abnormalities—vertebral deformation, truncation of the tail, orbital protrusion and an epidermal hyperplastic lesion on the rostrum—while maintaining normal behaviour. While not conclusive, these co‐occurring pathologies are compatible with trawl capture. This article serves to highlight the need to consider sublethal injury, rather than binary survival, in assessments of fisheries impact for threatened elasmobranchs.

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Publication Details

Journal
Aquaculture Fish and Fisheries
Published
2026-10-30
DOI
https://doi.org/10.1002/aff2.70361
Primary Topic
Ichthyology and Marine Biology
Type
article
Field-Weighted Citation Impact
0.00

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Chronic Sublethal Injury in a Critically Endangered Flapper Skate ( Dipturus intermedius ): In Situ Observations Compatible With Trawl Capture

Reece Mills, H. S. Randhawa, Samuel D. G. Smith, Patrick Colman Collins et al.
2 links
Aquaculture Fish and Fisheries
Ichthyology and Marine Biology
article

Chronic Sublethal Injury in a Critically Endangered Flapper Skate ( Dipturus intermedius ): In Situ Observations Compatible With Trawl Capture

Reece Mills, H. S. Randhawa, Samuel D. G. Smith, Patrick Colman Collins, Chiara Gambardella, Mercedes Dorrian-Smith, Fergal Glynn, Gabriel S. N. R. Ferreira, Susie Mitchell
article en

Abstract

ABSTRACT Sublethal effects of bycatch in elasmobranchs are typically assessed using short‐term survival metrics, yet post‐release pathology remains poorly documented. We report in situ observations of a flapper skate ( Dipturus intermedius ) in the northeast Atlantic exhibiting skeletal and soft‐tissue abnormalities—vertebral deformation, truncation of the tail, orbital protrusion and an epidermal hyperplastic lesion on the rostrum—while maintaining normal behaviour. While not conclusive, these co‐occurring pathologies are compatible with trawl capture. This article serves to highlight the need to consider sublethal injury, rather than binary survival, in assessments of fisheries impact for threatened elasmobranchs.

Aquaculture Fish and FisheriesVol. 6(6)
Queen's University Belfast (GB), University of Iceland (IS), Marine Institute (IE), New Brunswick Museum (CA)
Department of Agriculture, Environment and Rural Affairs, UK Government, Department for the Economy, European Commission
Life below water
Openalex Percentile: Top 15%
Ichthyology and Marine Biology
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