A radiographic method for feeding studies on fish using metallic iron powder as a marker

• Published in: Journal of Fish Biology
• Main Authors: Talbot, C., Higgins, P. J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1983
• Subjects: Atlantic salmon; Salmo salar
• Online Access: http://dx.doi.org/10.1111/j.1095-8649.1983.tb02896.x; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1983.tb02896.x; https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1983.tb02896.x

A novel method for studying trophic dynamics of fish is described which involves X‐raying animals which have been fed a diet labelled with metallic iron powder. Results of feeding studies on juvenile Atlantic salmon, Salmo salar L., are presented which demonstrate that food consumption and gastric evacuation rates can be measured without incurring the major disadvantages offeree feeding, starvation or autopsy which are associated with most of the established methods.