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Marine Fisheries Research - Barotrauma and Recompression Research

Yelloweye Rockfish with esophageal eversion
Yelloweye Rockfish with esophageal eversion

For fishes with swimbladders, the rapid decompression accompanying fishery capture can cause severe barotrauma, including overexpansion of the swim bladder, crushing and bruising of internal organs, esophageal eversion, exophthalmia, and embolism in the vasculature.

Studies examining the effects of capture-induced barotrauma on release behavior and survival of species of Sebastes (Pacific Rockfish) have found that barotrauma can affect both short- and long-term survival of Rockfish. Our research team has conducted studies on the physiology of barotrauma, including post-capture survival and behavior. This work is not currently on-going.

The Fisheries Research Team has also conducted several studies on fish recompression. These studies include investing the effects of venting, and the use of descending devices to mitigate barotrauma in Rockfish.

Types of descending devices
Types of descending devices

 

Barotrauma and Recompression Publications and Information Reports

 

 

 

 

Video

Video of a recreationally caught Yelloweye Rockfish being placed in a cage and lowered to approximately 70 feet before being released.

For more information on Rockfish recompression visit the MRP YouTube page

 

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