While I do not have a spreadsheet of the amount of lead based weights I purchase each year, I do know what I purchase on a regular basis.
As I do not throw jigs, I have not lost any in the past several years (1/2 ounce and heavier). I do go through about 10 panfish size jigs. These are mostly cut off and replaced at home.
The other lead weights I use are drop shot weights. In the past 10 years I have purchased from Charles Sim. I buy 50 each of: 1/4 and 3/8 and 20 1/2 ounce. I have done this twice in ten years.
Spinner baits/ buzzbaits: Probably broke more than I lost and that amounts to very few.
Doing a search on lead fishing weights/lead poisoning in birds etc, I found old studies (circa 1991 through 2004) ststements of 400-500
"Reference 5 cites a figure of 2,700 tons of lead sinkers made per year in the United States, adding that "400-550 tons" of lead sinkers are made in Canada each year (500 according to reference 7). "
5) Sanborn, Wendy. 2002. Lead poisoning of North American wildlife from lead shot and lead fishing tackle (draft). HawkWatch International, Inc., Salt Lake City, UT 84155.
7) Scheuhammer, A.M., Money, S.L., Kirk, D.A., Donaldson, G. "Lead fishing sinkers and jigs in Canada: Review of their use patterns and toxic impacts on wildlife." Occasional Paper Number 108, Canadian Wildlife Service, March 2003.
So if we take the 2700 tonnes and put that into ounces and the 500 tons for Canada we get
1 ton = 32000 ounces
2700 tonnes = 86,400,000 ounces
If we take a sinker at 1/2 ounce - we get 172,800,000 1/2 ounce sinkers. That's 172.8 million, 1/2 ounce sinkers produced every year in the United States.
in Canada that would be 500 tonnes = 1 million pounds
1 million pounds = 16 million ounces of lead sinkers or 32 million 1/2 ounce sinkers.
In 2010 there were 2.7 million Canadian anglers and 554,000 foreign anglers for a total of 3.2 million anglers.
Canadian anglers average a total of 14.4 days on the water while foreign anglers averaged 7 days or to put it in perspective:
2.7 million CDN anglers fished for 38.8 million days (yes including ice fishing dammit)
554,000 foreign anglers fished for 3.878 million days or a total of 42.678 million days.
Divide the number of 1/2 ounce sinkers by the number of anglers and then by the number of days and we get:
172 800 000 sinkers / 3287603 anglers = 52.56 1/2 ounce sinkers purchased by each angler every year? I don't buy 26 ounces of lead every year.
That's every year
So:
1) where are they getting the manufacturing numbers from? It does not compute.
2) How many lead sinkers are purchased every year in Canada?
3) how many birds a really dying from ingesting lead from fishing sinkers and not from other lead sources if lead shot was banned in Canada in 1999.
survey results from Canada done every 5 years as of 2010 (2015 is not finished yet)
http://www.dfo-mpo.gc.ca/stats/rec/can/ ... n4-eng.htm
http://www.jeffsundin.com/Article_Lead_ ... _Loons.htm