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lAfi 2 0 1976 ^
Fish Biologist Claims Superior Trout Scare Overemphasized
MASQUERS -- Mfctigate latest scare over mateateatod
^ka Superior late treat temaktog tea mock of email mmpia,
fimfatotogtetfaeltoree. .
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Baaed an the present fteh tampteig. djf i peHgas* wnma tea oorfnnally eats ft* la rang and of a ctek * poies*>
ig by the traces at mercury or aotectesriaated Mtek,
POd, tcconBn te in Wr&L wngfat is * fteh afategtat SEthe MifWpBDepertmsjt f NattralBaeoarceaspeciai-
mg te therTre* native to Lake Superior mft the pbated
nadromous varieties tfte king salmon and cofaoe,
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Wright, bead of the Great Lakes Fisheries writ of Ike SMB, i te charge of netting samples of Stgwrior tab impdlatliaia
r study as te bahtt*, breeding, movement and tea Bba.
he netted flab aw aba need by Water naemsrat Ownmteston nff for steely* trace dements.'He rsnrtrrtwf a study of
itty lake trad off Biaek Hirer Harbor te the summer * 774. Tba *74 study was made te determine stocks of tea
scent (fatly lake treat) and see if the pnydafien mould
jppart comaaordal netting.
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The latest scare came from Oak netted off Isle Itoyak.
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Few. of the normal Mackinac (toaa lafca treat) sheer any '
! the raogea^f hgh PCBs and nerery coats msasaed
-te tha flbeevet and' tease that do are in fish 27 teehes or
. htggm. Meat coasts are far below' the safety level of mmeery
sotfPOBs, Wright said. \
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i of tea problem fishare the fete Stecowato and a Iter
; rery Mg Meckmnes and these fiah are rarefy tafcan by the
; areraga flahennan.
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* Tha DNBr be said, is not marketing its experimental fatty toke tro* as a safety precaution. And the department also .advteae, agate as e precaWioo, that persona not eat mare than onemaai a reek of l*ke Superior laker*. The prehioa hi ttea lake largely lies wftb tea SUcowet and tee rery big
Whan the tele Boyatefish were studied, fmiwdscista toad
DOT and re& as POs and mercury. They said terete exceed
ed the IS ports par miHtoB safety level of DDT and PCBs
and ever tea firs ppm safe level sf meremy. might aaU
a ten fish shared 12 to 14 ppm of PGBa bat agate, these
more big Becfiret and a lav tag
Hs said mast
Lake Superior trout are far below tnb fire ppm maasiaii
<or marcrey and lew ran more than one ppm of the tore! of teafire retardate chemical.
i realistically., tea only prehteuis would be with .
pregaant women who continually out fish.
Tba sample te part of tee problem.
Wright sud B-te eitiwndy eipeaaire to net simple* ad whew his department did the --iyw off life Borate It wa mostly interested hi Stemwot md very tew Marti-
aaa were ecddaatdiy can**. Hum were rery lag* tea lahare m the 27 inches end better category.
This leads,to a skewed sample store the few very hig tea
token are only a very mmB port of ten Ison late treat pore
totioo hi Superior. The sample probably te not ttattetterily
representative of tee Labe Superior tea take tro* impelstiwi,
Wright agreed in an interview.
r
The small lean liken are not a problem, he
When tee DNR made a aoreeet of Sseooet off
Hirer harbor two yearn age, a tea tro* were taka, to
the sample, Wright arid.
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Itereocs catching Grower can prepare them for eatta by csttiug off the befly fat and & fat skew tea
and the bade and will probably bring the mareary * PCS*
level below the toteranem recommended by ttm gtme, Wkte* advised.
It Is probably good advice, a all large tie* taha ftmn
Superior.
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