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No. 30: Nov-Dec 1983

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The Problem Of The Precocious Parr

A startling shift in the breeding pat-terns of the Atlantic salmon is taking place in the rivers of North America and Europe. Male parr (parr are young sal-mon that have not yet been to sea) are becoming sexually precocious in large numbers. The small males have up to 20% of their body weight allocated to testes and, in consequence, seem to be bulging from full meals. Actually, they are ready to dart in under mature spawning salmon and fertilize some of the newly laid eggs. Experiments show that the parr are rather successful in their furtive endeavors. The question at hand is why the parr are developing precociously when there are sufficient mature male salmon around to do the job. (Montgomery, W. Linn; "Parr Excellence," Natural History, 92:59, June 1983.)

From Science Frontiers #30, NOV-DEC 1983. 1983-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:

Quotes

  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987