Washington, July 31, 2017 (GLOBE NEWSWIRE) -- Earlier this year, a team of scientists led by Dr. Ray Hilborn found, among other conclusions, that forage fish are best managed on a case-by-case basis that accounts for their unique environmental roles. In a memo earlier this month, an inter-state scientific review committee tasked with incorporating the ecological role of menhaden into management determined that this conclusion aligns with their own findings.
The Atlantic States Marine Fisheries Commission’s (ASMFC) Biological and Ecological Reference Points (BERP) Workgroup, which is leading development of ecosystem-based fisheries management for Atlantic menhaden, reviewed the Hilborn et al. paper earlier this summer. It concluded that the paper’s recommendation of using stock-specific models to evaluate ecosystem needs were similar to models being developed by the workgroup.
“The [workgroup] is currently developing a suite of intermediate complexity menhaden-specific models that align with the general recommendations from both Dr. Hilborn and the 2015 Stock Assessment Peer Review Panel,” said the July 14 memo, Review of Hilborn et al. 2017.[1] “The [workgroup] anticipates that these models will be ready for peer review in 2019.”
The Hilborn et al. study, published in April in Fisheries Research, found that there were several variables in forage fish species that make imprecise, one-size-fits-all management approaches difficult. Most importantly, there seems to be little correlation between the number of predator species in the water and the number of forage fish, making it nearly impossible to determine a catch level that is appropriate for forage fish as a whole. Other variables include the natural variability of forage fish, which is different from species to species, and relative locations of predators and forage species.
“We suggest that any evaluation of harvest policies for forage fish needs to include these issues, and that models tailored for individual species and ecosystems are needed to guide fisheries management policy,” the paper finds.
The ASMFC will consider the work of the BERP, including its review of Dr. Hilborn’s paper, at its upcoming 2017 summer meeting, to be held from August 1-3 in Alexandria, Virginia.
[1] ASMFC Biological Ecological Reference Points Workgroup, “Memorandum: Review of Hilborn et al. 2017,” July 14, 2017
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