Re: NMFS considering petition to protect thresher
This petition seems to be largely driven by emotion, and lacks actual data. The six distinct populations referenced in the petition have no biological basis. In addition, there is no formal population assessment data on common thresher sharks. The only population "data" referenced here is the IUCN listing, which is outdated and doesn't provide species-specific information for the thresher sharks complex. In addition, the IUCN only relied on pelagic long line logbooks, and common thresher sharks in many areas (especially the northwest Atlantic), have a coastal distribution and there is little overlap with commerial long line gear, which is usually fished much further offshore. It is likely most caught in the pelagic long line fishery are bigeye threshers. Catch Per Unit Effort from logbooks should also not be relied upon solely to assess population status, especially in non-target species.
Also, the assertion that there isn't much protection from regulations is ludacris. There extremely conservative size and bag limits in both the recreational and commercial shark fisheries, as well as time-area closures.
Lastly, current information suggests that common thresher populations are stable or increasing in several areas.
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