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Author | : Yu.G. Aleyev |
Publisher | : Springer Science & Business Media |
Total Pages | : 430 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401013241 |
Download Nekton Book in PDF, ePub and Kindle
1. Nekton as an ecomorphological type of biont The term nekton was suggested and used for the first time in 1890 by E. Haeckel in his book Plankton-Studien. Etymologically the word nekton derives from the Greek VTJKTTJP, i.e. swimming. As Haeckel defined it, nekton describes collectively all swimming animals that are 'free to choose their path', i.e. can resist a strong current of water and, distinct from planktonic animals, go where they wish. While giving a general idea of the dividing line between plankton and nekton, Haeckel's definition, which has played an important role in shaping our ideas about nekton, today no longer provides a sufficient basis for ecological and functional morphological investigations, since it affords no possibility of quantitatively assessing either the boundary between plankton and nekton or that between nekton and other ecomorphological types of biont. Thus Parin (1968), proceeding from Haeckel's principle, believes that in the epipelagic zone of the ocean the minimum size of nektonic fishes with a well-developed capacity for active swimming may be between 15 and 30 cm, as fishes shorter than 15 cm are unable to counter oceanic currents. Meanwhile young Leucaspius (Leucaspius delineatus) only 1.5 cm long, observed by this writer in ponds near Moscow proved capable of active horizontal migrations across the entire body of water, which, if Haeckel's definition is accepted, brings the border between planktonic and nektonic fish in this case to between 1.5 and 2.0 cm.
Author | : Rainer Kiko |
Publisher | : Frontiers Media SA |
Total Pages | : 164 |
Release | : 2020-09-14 |
Genre | : Science |
ISBN | : 2889639827 |
Download Zooplankton and Nekton: Gatekeepers of the Biological Pump Book in PDF, ePub and Kindle
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author | : Richard D. Brodeur |
Publisher | : |
Total Pages | : 590 |
Release | : 1986 |
Genre | : Nekton |
ISBN | : |
Download Distribution and Relative Abundance of Pelagic Nonsalmonid Nekton Off Oregon and Washington, 1979-84 Book in PDF, ePub and Kindle
Author | : Donald S. Day |
Publisher | : |
Total Pages | : 104 |
Release | : 1971 |
Genre | : Nekton |
ISBN | : |
Download Macrozooplankton and Small Nekton in the Coastal Waters Off Vancouver Island (Canada) and Washington, Spring and Fall of 1963 Book in PDF, ePub and Kindle
Author | : |
Publisher | : Academic Press |
Total Pages | : 643 |
Release | : 2009-08-26 |
Genre | : Science |
ISBN | : 012375724X |
Download Marine Biology Book in PDF, ePub and Kindle
Elements of Physical Oceanography is a derivative of the Encyclopedia of Ocean Sciences, Second Edition and serves as an important reference on current physical oceanography knowledge and expertise in one convenient and accessible source. Its selection of articles—all written by experts in their field—focuses on ocean physics, air-sea transfers, waves, mixing, ice, and the processes of transfer of properties such as heat, salinity, momentum and dissolved gases, within and into the ocean. Elements of Physical Oceanography serves as an ideal reference for topical research. References related articles in physical oceanography to facilitate further research Richly illustrated with figures and tables that aid in understanding key concepts Includes an introductory overview and then explores each topic in detail, making it useful to experts and graduate-level researchers Topical arrangement makes it the perfect desk reference
Author | : Todd William Miller |
Publisher | : |
Total Pages | : 228 |
Release | : 2006 |
Genre | : Food chains (Ecology) |
ISBN | : |
Download Trophic Dynamics of Marine Nekton and Zooplankton Within the Northern California Current Pelagic Ecosystem Book in PDF, ePub and Kindle
The Northern California Current (NCC) ecosystem exhibits extreme seasonal, interannual and interdecadal shifts in the abiotic environment and shifts in primary and higher production. This variability is also apparent in the spatial structure of the ecosystem with nearshore-shelf waters (
Author | : |
Publisher | : |
Total Pages | : 128 |
Release | : 1997 |
Genre | : Nekton |
ISBN | : |
Download Report of the Non-Fish Nekton Workshop Book in PDF, ePub and Kindle
Author | : Bob McElyea |
Publisher | : |
Total Pages | : 70 |
Release | : 2003 |
Genre | : Aquatic ecology |
ISBN | : |
Download An Evaluation of Nekton at Two Cooling Water Intake Systems in the Houston Ship Channel from 1972 to 2001 Book in PDF, ePub and Kindle
Author | : Robert F. Presley |
Publisher | : |
Total Pages | : 26 |
Release | : 1971 |
Genre | : Marine animals |
ISBN | : |
Download Plankton, Nekton, and Nightlight Collections (PF Series) with Pertinent Data Book in PDF, ePub and Kindle
Author | : |
Publisher | : |
Total Pages | : 68 |
Release | : 1996 |
Genre | : Florida Keys National Marine Sanctuary (Fla.) |
ISBN | : |
Download Site Characterization for the Florida Keys National Marine Sanctuary and Environs: Nekton, plankton and oceanic influences Book in PDF, ePub and Kindle