Here is some good reading regarding The Brown Pelican :Jg Edwards.
In 1918 T. G. Pearson and Robert Allen estimated that there were 65,000 brown pelicans along the 1,500-mile Gulf of Mexico coastline. In 1934, after he became president of the National Audubon Society but many years before DDT was used, Allen repeated that Gulf survey and found an 82 percent decrease in pelicans. He saw only 200 pelicans in Texas, and practically none in Louisiana.
In 1971, Robert Finley of the U.S. Fish and Wildlife Service presented testimony to the CaliforniaWater Quality Control Board in Los Angeles, asserting that a population of over 50,000 brown pelicans has all but disappeared from the Gulf Coast of Texas and Louisiana since 1961. This figure had been published elsewhere; however, since the pelicans were known to have been very scarce there in 1959, an increase to 50,000 by 1961 would have been impossible! I called Finley and questioned his figures. He responded by letter on Mar. 29, 1971, stating: Although the reports are sketchy, Jim Keith and I both feel that the estimate of 50,000 is not unreasonably high. On August 2, 1971, Finley wrote to Congressman W. R. Poage (before whom I had testified earlier about Finleys erroneous figures), admitting that the year 1961 was merely a hasty approximation of an unknown time. After reviewing the evidence, I think now that I should have said that 50,000 pelicans disappeared 1961 [instead of his previous claim that they had disappeared 1961]. Both of those statements were incorrect, but the anti-DDT environmental propagandists never corrected them! In California, brown pelicans had experienced no difficulties during 20 years of heavy use of DDT, but suddenly suffered nesting failures just two months after the great Santa Barbara oil spill surrounded their nesting island (Anacapa) about Jan. 28, 1969. Environmentalists, however, blamed only DDT for the nesting failure, and never mentioned that great oil spill! They also concealed the fact that California Fish and Game found that anchovies there contained 17 ppm of lead, which is known to cause severe shell thinning. They collected hundreds of pelican eggs from that colony during the next two summers, and the shells were measured with screw micrometers. (Collecting 74 percent of all the pelicans eggs for analysis, of course, was obviously harmful to the success of the colony. ) After April 2, 1972, I obtained all of those measurements, and found that they clearly revealed correlations between DDT residues and shell thicknesses. Some of the thinnest shells were those of eggs with low DDT, and the higher DDT concentrations were often in the thicker-shelled eggs. This was presented to the EPAand to Congress. Robert Finley, however, wrote to Poage on August 2, 1971, to criticize my testimony.He told the Congressmen that there is not a shred of evidence that spilled oil is capable of causing thin-shelled eggs or otherwise affecting bird reproduction. In response, I cited many references to the contrary. Nothing further was heard from Robert Finley.
References:
Journal of American Physicians and Surgeons Volume 9 Number 3 Fall 2004
Pearson TG, Allen RP. . New York, N.Y.: Appleton-Century; 1937. Allen RP. Pearsons pelican survey in 1918. 1934;52:199.
Finley RB. Testimony before California Water Quality Control Board, Feb. 20, 1971.
Keith JO. Transactions of the 35 North AmericanWildlife Conference, 1970, p 56.
Edwards JG. Brown pelicans revisited: review of data 1918 to 1982. March 15, 1982.
Jehl JR. Is 30 million years long enough? , Jan/Feb 1970, pp 16-24.
HazeltineWE. Testimony before Portland EPA hearings, Jan. 14, 1978.
Switzer B. Transcript of EPA Consolidated Hearings; 1972;8212-8236.
Edwards JG. Birds not seriously affected by DDT. Hearings before Committee on Agriculture, conducted by CongressmanW. R. Poage, March 1971, S.N. 90-A, pp 575-594.
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