There is a lot going on in this thread, but I'll try to comment some of the topics.
A caveat first, I've been outta the game for the most part for 6 years but I'll try to answer questions when I know the answer. I hope I can answer some of the questions and comments without sounding too preachy or too academic. I think these topics need to be discussed and understood.
I know there is are lots of discussions going on asking if we are killing too many ducks, so I'd like to make a few points and add a few of my opinions.
Eric, you first question is about dropping the NAWMP goal of 8.5 million mallards as an objective of AHM. It is my understanding that the Mississippi and Central Flyways requested this be dropped as an objective mainly because the goal was developed as an aspirational average population size and never meant to be used in setting of harvest regulations. Incorporation of the NAWMP goal devalues harvest when below 8.5 million mallards. The removal of this constraint was also informed by everything we have learned a lot about duck population dynamics since AHM was implemented in 1995. So in answer to your second question, yes, we have learned that current harvest rates/ levels are sustainable.
In my mind much of this discussion is really about hunter satisfaction. But satisfaction is a really complex thing to measure and even harder to manage. Are you satisfied with by full strap, or the chance to take a limit, or a great retrieve by your young pup or your grandkids having a good time or other things? I know my level of satisfaction varies with every hunt. So, it feels like much of the discussion is really hunters talking about being dissatisfied because they didn't shoot a limit or felt crowded/couldn't find a place to hunt. They might have shot a few ducks but didn't get a full limit. But if the limit had been 4 and they shot 4 then it would have been a good day. From a managers point of view, how do you set regulations that leads to greater satisfaction? Simpler regulations? Fewer hunters? More ducks? Fewer hunters on wildlife areas? Can we really manage to meet hunter expectations?
I'd like to point out that as harvest levels increase that hunter harvest/day tends to decline. Here is an example from an old fisheries management text. Think about it as the more harvest pressure increases the harder it is to get the next duck or fish. Maximum sustained yield is the current management goal. Hunters have told managers that they want the largest sustained yield which is that MSY point on this graph. So as you can see you get fewer ducks per day at higher harvest levels. Would harvesting more ducks per day but fewer ducks overall lead to greater satisfaction? Would you support managers lowering limits if it resulted in it being easier to harvest ducks. I have heard some hunters cheer on the idea of lowering limits to drive hunters out of the marsh. Is that really the result we want?
Duck populations are resilient. Habitat is what drives the populations at current harvest levels. We are in a drought and it's going to get worse unless we get widespread epic rains across the prairies starting today. But we are not overharvesting them. We have seen duck numbers this low before and they recovered. There isn't the habitat base to support higher levels of production and recruitment during a drought. Predation rates on hens and young birds are higher during drought as well. The ducks that are out there are mainly smart adults that respond to hunting by finding safe spots when pressured. The drought along the Gulf Coast and abnormally warm winter changed the distribution and density of ducks last hunting season. The combination of lower population, poor recruitment, warm temperatures and wintering ground drought was a quadruple whammy for duck hunters in the Mississippi and Central Flyway especially in the traditional high harvest areas.
Yes, hunter numbers are declining, but hunters feel crowded because the huntable habitat base is declining in migration and wintering areas. Hunter density is higher now because the remaining hunters are crowded into smaller areas. I am sure this also leads to dissatisfaction and the perception that there are no ducks or there are more hunters. Hunting may not be killing ducks but hunting pressure is causing them to spread out and stay put or only feed at night. Likewise, the unusually warm weather allowed birds to stay in areas much further north than normal.
The science we have to manage waterfowl populations in North America, especially ducks, is the best in the world. Our monitoring programs are the envy of the rest of the world. Hunters should support this science and not bash it. Its is hard enough to maintain the monitoring program in declining budget times and with so many other priorities. If hunters can't support or actively undermine the science then it will be even harder to maintain the our management system. I can't stress the point enough that hunters need to act cohesively to support the tradition of hunting and the science that supports it. There are lots of people trying to close down hunting, even more who see the shifting constituency and are looking to find new constituents and others who are opposed to managing wildlife and think that we should let natural processes take over.
Lastly, there are some great students and professors that are studying waterfowl, their movements, response to disturbance, recruitment, etc. I encourage all to find the social media pages of these labs along with the waterfowl NGOs. Learn what is going on out there, you'll be amazed at what we are learning from ducks. Also support the groups that protecting and managing habitats. I remain optimistic because of the energy of the new generations but we need to support them.
It's great that we can discuss these topics here on duckboats.net. I look forward to everyone's thoughts.