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Related Experiment Video

Updated: Jul 10, 2026

Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status
13:18

Data Collection on Marine Litter Ingestion in Sea Turtles and Thresholds for Good Environmental Status

Published on: May 18, 2019

Fishhook lesions in loggerhead sea turtles.

Ana Luisa S Valente1, Maria Luz Parga, Roser Velarde

  • 1Servei d'Ecopatologia de Fauna Salvatge, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193-Bellaterra, Barcelona, Spain.

Journal of Wildlife Diseases
|November 7, 2007
PubMed
Summary
This summary is machine-generated.

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Ingested fishhooks can injure loggerhead sea turtles (Caretta caretta). The attached fishing line, not the hook itself, often causes lethal gastrointestinal tract damage.

Area of Science:

  • Marine Biology
  • Wildlife Toxicology
  • Conservation Medicine

Background:

  • Sea turtles, including loggerheads (Caretta caretta), are vulnerable to marine debris ingestion.
  • Fishhooks pose a significant threat due to their sharp nature and potential for internal damage.

Observation:

  • Four cases of loggerhead sea turtles with gastrointestinal tract fishhook impaction were analyzed.
  • Injuries ranged from esophageal fibrosis and cloacal expulsion to intestinal plication and necrosis.
  • One severe case involved intestinal necrosis directly linked to the monofilament line attached to an esophageal hook.

Findings:

  • Lethal injuries were primarily attributed to strangulation and traction effects of the attached fishing line, not the hook embedded in the esophageal mucosa.
  • Factors influencing survival included hook size, impaction location, and the presence/length of the fishing line.

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Implications:

  • Fishing line entanglement and ingestion are critical threats to loggerhead sea turtle survival.
  • Management strategies should focus on reducing fishing line debris and addressing hook ingestion risks.
  • Understanding these injury mechanisms is vital for effective conservation efforts for sea turtles.