I was invited by the Great Lakes Fishery Commission to attend a stakeholders meeting in Niagara Falls, Ontario. I attended the meeting last Thursday, and right off the bat I'll say that the ground rules set by the GLFC staffer was that what was said in the room had to stay in the room, so I will not discuss anything that was said (but I will say this was the most relaxed and un-confrontational fisheries discussion I have seen, and I've been in this for 30+ years), and I will not mention any names, except to say that the meeting was also attended by Steve LaPan from NYSDEC and Andy Todd from OMNRF. The group consisted of about 2 dozen people, approximately half from Canada, half from the USA, and was pretty evenly split between tributary, recreational boating and commercial (charter) boating fisheries, with a couple of folks that I would say were Scientific community representatives. Steve and Andy did agree that their short position statement that was provided to participants for "pre-work" could be released through social media, etc, so I am pasting it below for your consideration. Hopefully, this well thought out statement of "where things are at" right now will lead to some constructive thoughts and comments, but will also provide an appreciation for the difficulties associated with managing this resource.
"April 13, 2016 Lake Ontario Committee Fisheries Management Issues and Perspectives Management Context:Under the framework of the Great Lakes Fishery Commission’s
Joint Strategic Plan for Management of Great Lakes Fisheries, the Lake Ontario Committee (NYS Department of Environmental Conservation (DEC) and the Ontario Ministry of Natural Resources and Forestry (OMNRF)) developed Fish Community Objectives (FCOs;
[data-redactor="1"]http://www.glfc.org/lakecom/loc/lochome.php) in 2013 in consultation with the angling public.
Fisheries Management Challenges: DEC and OMNRF recognize a number of impediments to and challenges in achieving FCOs, including:
- “Uncertainty.” We cannot control: nutrient inputs to the lake that affect overall fish production, Chinook natural reproduction (can increase), impacts of climate change, or, with the exception of sea lamprey, invasive species. While we continue to invest in the best science possible, our estimates of fish abundance, harvest, lower food web dynamics, etc. are not precise, and our understanding of our constantly changing ecosystem is imperfect.
- Our commitment to maintain a focus on trophy Chinook salmon requires us to maintain a healthy alewife population, but if alewife become over-abundant, they compromise our efforts to restore native species. In addition to alewife preying on the young of native species, a diet rich in alewife can cause a vitamin B deficiency in native species, resulting in impaired natural reproduction.
- Based on stocking numbers and trout and salmon diet studies, Chinook salmon consume the greatest amount of alewife in Lake Ontario. Chinook grow from 0 to 30 pounds in four years, whereas a lake trout might take 15 years to reach 20 pounds. Also, unlike Chinook, lake trout do not rely primarily on a diet of alewife. Compared to Chinook that migrate long distances requiring additional energy (i.e. more alewife consumption), lake trout are more territorial. Managing Chinook stocking numbers, therefore, provides the single greatest impact on alewife abundance.
- Lake Ontario Chinook remain the largest in the Great Lakes, but based on historic information from lakes Michigan and Huron, Chinook size in Lake Ontario will decline if alewife numbers fall below a certain level. Chinook stocking reductions designed to relieve predation pressure on alewife are “lagged” by three years. Chinook are stocked as young of the year (age-0), and they don’t eat substantial numbers of alewife until their third year in the lake (age-2). Due to imprecision, uncertainty and environmental variability, we are not able to effectively manage for higher numbers of smaller Chinook without greatly increasing the chances of an alewife population collapse.
Management Realities: Recent studies conducted by LOC and partner agencies have provided new information of great relevance to fishery management decisions that the LOC must make in the near future, including:
- On average, 50% of Chinooks in the open lake fishery are naturally reproduced or “wild,” hence the LOC can only “control” 50% of the largest alewife consumers in the lake.
- Chinook reared in cooperative pen projects survive, on average, twice as well as those stocked by traditional, “direct” methods. The LOC currently provides approximately 706,000 Chinooks for pen rearing, or 30% of our 2.36 million stocking target (i.e. 706,000 pen reared and 1,654,000 direct stocked). Since pen reared fish survive 2X better than direct stocked fish, the “equivalent” number of stocked Chinooks is: PEN (706,000 X 2 = 1,412,000) + DIRECT (1,654,000 X 1 = 1,654,000) = 3,066,000 fish.
- Given an equivalent stocking number of 3,066,000 Chinook, and knowing that 50% of the Chinooks in the open lake are of wild origin, the average total number of Chinooks added to the lake each year is 3,066,000 stocked equivalents + 3,066,000 wild equivalents = 6,123,000 fish. In other words, if there was no Chinook natural reproduction, the LOC would have to stock the equivalent of 6,123,000 Chinooks to maintain the fishery at its current level.
- Alewife population surveys in 2014 and 2015 revealed that while the adult population (fish age 2 and older) has remained stable from 2011 to 2015, reproduction in 2013 and 2014 was poor. This will cause a decline in the adult alewife population in 2016, and possibly again in 2017. Since the adult alewife population in Lake Ontario consists of fish age 2 to 8, two consecutive years of poor reproduction is of concern. "
This group agreed to meet again in September (there are some obstacles in terms of varying guiding seasons, and I could have problems as I have a couple of trips planned) when we should be able to get at least a preliminary sense of what the effects of the 2015-16 winter are, and what the young of the year alewife numbers are like, but if those numbers remain low, it is my sense that changes will need to be considered, and I think there is likely some pain in it for everyone, and we will likely be tasked with considering ways to allocate and minimize that pain. So I'll be listening to the discussion here and elsewhere and carrying what I hear (that fits the science and the realm of possibility) back to the table in the fall.