Other Peregrine Projects > USA Peregrines
ME / BRI - 2009-16
The Peregrine Chick:
--- Quote from: allikat on May 18, 2009, 18:30 ---Oh how I wish we could stop using DDT & DDE...
--- End quote ---
Both are totally banned in lots of countries - some have partial bans. This is a partial list, pretty sure I have the right dates. These are total ban dates, some had partial bans in advance of total bans I believe.
1968 - Hungary (first county to ban)
1970 - Cuba, Norway, Sweden
1972 - United States
1976 - Poland
1984 - Singapore, United Kingdom
1985 - Canada, Chile
1986 - Liechtenstein, Korea, Switzerland
Wikipedia has a decent synopsis of DDT, its history etc - http://en.wikipedia.org/wiki/DDT - including the argument for allowing its use to combat malaria in developing nations where malaria is endemic and a major cause of mortality.
article: UN seeks ban DDT pesticide, and fight malaria
article: WHO backs DDT for malaria control
allikat:
Thank Carly...I saved that document.
carly:
I can do one better, here the link to the report:
http://www.briloon.org/pub/doc/2008Contaminant.pdf
I can't open it at home...well unless I download reader but it's probably over my head anyway ::)
allikat:
Oh how I wish we could stop using DDT & DDE...
The Peregrine Chick:
--- Quote from: carly on May 18, 2009, 18:00 ---The biologist/project leader posted something interesting today with regards to the failed eggs here from the past 2 years. They did indeed have the eggs tested - $1,000 an egg to test!!- and they were found to be high in contaminants! No comment as to whether or not this is the same pair from the past 2 years was included with the post.
--- End quote ---
Just a bit of a clarification, all wild peregrines in North America are sure to have some contaminants in their system - the spend their winters in Central/South America where pesticides/herbicides including DDT and DDE are regularly used on crops. Eggs are produced from the reserves of the female, so if the female has contaminants store in those reserves, they are passed along to the eggshell. Question is, and I can't tell from your post Carly, is if the contaminants in the eggshell samples have been shown to be related to eggshell thinning or with reduced viability of the eggs or whether they are present and unrelated to the eggs' viability.
If you find out more, let us know ...
--- Quote from: carly on May 18, 2009, 18:00 ---Would I be correct to assume TPC - that in the event of a possible predator the egg is regarded as 'ours' and must not fall into enemy hands? Maybe that's what the parent at this site was doing, trying to gather the eggs to protect them from predatation?
--- End quote ---
They are hardwired to protect their young, regardless of age/stage. Intruder arrives, all young must be undercover. That simple.
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