Download or read book Professor A E Verrill s Fresh Water Leeches A Tribute a Critique Notulae Naturae of The Acad of Natural Sciences of Phila No 245 written by and published by Academy of Natural Sciences. This book was released on with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Notulae Naturae of the Academy of Natural Sciences of Philadelphia written by and published by . This book was released on 1946 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Catalog of the Library of the Academy of Natural Sciences of Philadelphia written by Academy of Natural Sciences of Philadelphia. Library and published by Macmillan Reference USA. This book was released on 1972 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Helminthological Abstracts written by and published by . This book was released on 1952 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The National Union Catalog 1952 1955 Imprints written by and published by . This book was released on 1961 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dictionary Catalog of the Department Library written by United States. Department of the Interior. Library and published by . This book was released on 1967 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book National Union Catalog written by and published by . This book was released on 1961 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.

Download or read book Dictionary Catalog of the National Agricultural Library 1862 1965 written by National Agricultural Library (U.S.) and published by . This book was released on 1967 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The National Union Catalog Pre 1956 Imprints written by and published by . This book was released on 1968 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology and Classification of North American Freshwater Invertebrates written by James H. Thorp and published by Academic Press. This book was released on 2010 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The third edition of Ecology and Classification of North American Freshwater Invertebrates continues the tradition of in-depth coverage of the biology, ecology, phylogeny, and identification of freshwater invertebrates from the USA and Canada. This text serves as an authoritative single source for a broad coverage of the anatomy, physiology, ecology, and phylogeny of all major groups of invertebrates in inland waters of North America, north of Mexico." --Book Jacket.

Download or read book The Invertebrates written by R. S. K. Barnes and published by John Wiley & Sons. This book was released on 2009-04-13 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The majority of undergraduate texts in invertebrate zoology (of which there are many) fall into one of two categories. They either offer a systematic treatment of groups of animals phylum by phylum, or adopt a functional approach to the various anatomical and physiological systems of the better known species. The Invertebrates is the first and only textbook to integrate both approaches and thus meet the modern teaching needs of the subject. This is the only invertebrate textbook to integrate systematics and functional approaches. The molecular systematics sections have been completely updated for the new edition. Strong evolutionary theme which reflects the importance of molecular techniques throughout. Distills the essential characteristics of each invertebrate group and lists diagnostic features to allow comparisons between phyla. New phyla have been added for the new edition. Stresses comparisons in physiology, reproduction and development. Improved layout and illustration quality. Second edition has sold 14000 copies. Nature of the first edition: 'Students will like this book. It deserves to succeed.'

Download or read book North American Freshwater Leeches Exclusive of the Piscicolidae written by Roy T. Sawyer and published by Urbana: University of Illinois Press. This book was released on 1972 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Leech Biology and Behaviour Feeding biology ecology and systematics written by Roy T. Sawyer and published by Oxford University Press, USA. This book was released on 1986 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sawyer, a well-known leech specialist, surveys the most recent research on this biologically and medically important group of animals. Useful to neurobiologists, molecular biologists, zoologists, and ecologists, these volumes include coverage of the leech's increasingly important role in neurobiological and neurophysiological studies.

Download or read book Conservation of Endangered Freshwater Fish in Europe written by Arthur Kirchhofer and published by Birkhäuser. This book was released on 2012-12-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two events have recently improved the prospects of protecting fish and their environment in Switzerland: the acceptance of a new Federal Water Protection Law in the plebiscite of May 17th 1992, and the new Federal Legislation on Fisheries, in force since January 1st 1994. With this legal framework, the possibilities for protection of nature and landscape have now considerably improved in Switzerland. The most important aims of the Federal Law on Water Protection are to safeguard the natural habitats of the native flora and fauna and water as the habitat of aquatic organisms. This includes not only the preservation or restoration of water quality in lakes and rivers, but also, in rivers used for hydroelectricity, irrigation or as industrial or other water supplies, the maintenance of sufficient water to fulfill the minimal requirements for fish. However, good quality water in sufficient quan tities alone is not enough to guarantee the survival of fish. Intact fish habitats comprise various phYsical structures including plenty of hiding places, hunting grounds, reproduction and nursery areas within suitable distances from each other. This third aspect of conservation and restoration of aquatic habitats is a central point in the new Federal Law on Fisheries. Whereas the former versions of this law were more concerned with fishery regulations, the recent legislation defines new areas of responsibility for the federal and the cantonal governments.

Download or read book Water Beetles of China written by Manfred A. Jäch and published by . This book was released on 1995 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulmonates written by Vera Fretter and published by . This book was released on 1975 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 A.

Download or read book Complex Interactions in Lake Communities written by Stephen R. Carpenter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: In its statutory authority (National Science Foundation Act of 1950, as amended), the NSF is directed to both initiate and support basic scientific research. In its Ecology Program, one mode of initiating research is to en courage the development of new ideas through advisory workshops. The NSF is specifically directed to strengthen our nation's research potential. In addition, stimulating new approaches to research will continue to be prominent in the coming years as federal attention is given to increasing the innovativeness and competitiveness of the U. S. in science and engineering. A decision to initiate a workshop does not arise de novo in the Ecology Program. Rather, it emerges from panel discussions, conversations with in vestigators at meetings or on the phone, and from discussions between pro gram officers in the Division of Biotic Systems and Resources. This workshop was developed to provide advice to the NSF and the lim nological community. Some NSF perceptions on future funding for ecolog ical research on lake communities are presented here. Researchers often mentioned a paucity of innovative lake ecology at the community level. This perception was accompanied by a certain frustration since lakes probably have the best empirical data base of any natural environment and should continue to lead in the development of ecological concepts. Members of NSF advisory panels sometimes expressed similar concerns during consid eration of proposals for lake research.