Download or read book Lake Chilwa written by M. Kalk and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leonard C. Beadle In contrast to the more sta bie oceans, inland waters are, on the geological time scale, short-lived and are subject to great fluctuations in chemical composition and physical features. Very few lakes and rivers have existed continuously for more than a million years, and the life of the majority is to be measured in thousands or less. Earth movements, erosion and long-term climatic changes in the past have caused many of them to appear and disappear. No wonder then that most freshwater organism are especially adapted to great changes and many even to temporary extinction of their environment. Recent studies of residual sediments from existing and extinct lakes in tropical Africa have told us much about their age and the past history of their faunas and floras, from which we may deduce something about the climate and the conditions in the water in the past. The forces that have formed and moulded the African Great Lakes have been catastrophic in their violence and effects. They are not yet finished, but the present rate of change is, in human terms, too slow for direct observation of the ecological effects. The large man-made lakes are providing very good opportunities for studying the chemi cal and biological consequences of the initial filling but, once filled, they are artificially protected against major fluctuations.

Download or read book The Fish Oocyte written by Patrick J. Babin and published by Springer Science & Business Media. This book was released on 2007-08-17 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive overview on egg production in fish, from the standpoint of the oocyte. It covers oocyte development, maturation, hydration and fertilization. The book places special emphasis on using state-of-the-art tools for discerning the ultra-structure of the follicle and genomic/proteomic tools to fully understand biological basis of fish reproduction.

Download or read book Common and Scientific Names of Fishes from the United States and Canada written by C. Richard Robins and published by . This book was released on 1991 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Appendices - exotic fishes; names applied to hybrid fishes; important references for determining publication dates of certain works on fishes; changes from 1980 list and comments.

Download or read book Fishes of Polynesia written by and published by . This book was released on 1974 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology of Milkfish written by Teodora U. Bagarinao and published by . This book was released on 1991 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishes of the Western North Atlantic written by John Tee-Van and published by . This book was released on 1948 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Iowa Fish and Fishing written by James R. Harlan and published by . This book was released on 2012-07-01 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Checklist Of The Fishes Of Iowa, With Keys For Identification, By Reeve MacLaren Bailey.

Download or read book Fishes of the North eastern Atlantic and the Mediterranean written by Peter James Palmer Whitehead and published by . This book was released on 1984 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deel 1 van een serie van 3 bevat een determinatietabel en een beschrijving van soorten uit 64 families. De 3 delen zullen totaal 1256 soorten van 218 families omvatten