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Author: Andrew P. Hendry
Publisher: Princeton University Press
ISBN: 0691204179
Category : Science
Languages : en
Pages : 410
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Book Description
In recent years, scientists have realized that evolution can occur on timescales much shorter than the 'long lapse of ages' emphasized by Darwin - in fact, evolutionary change is occurring all around us all the time. This work provides an authoritative and accessible introduction to eco-evolutionary dynamics, a cutting-edge new field that seeks to unify evolution and ecology into a common conceptual framework focusing on rapid and dynamic environmental and evolutionary change.
Author: Andrew P. Hendry
Publisher: Princeton University Press
ISBN: 0691204179
Category : Science
Languages : en
Pages : 410
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Book Description
In recent years, scientists have realized that evolution can occur on timescales much shorter than the 'long lapse of ages' emphasized by Darwin - in fact, evolutionary change is occurring all around us all the time. This work provides an authoritative and accessible introduction to eco-evolutionary dynamics, a cutting-edge new field that seeks to unify evolution and ecology into a common conceptual framework focusing on rapid and dynamic environmental and evolutionary change.
Author: Samuel Frederick Hildebrand
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 424
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Book Description
Author: Vadim J. Birstein
Publisher: Springer Science & Business Media
ISBN: 0792345177
Category : Nature
Languages : en
Pages : 444
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Book Description
This volume presents a synthesis of basic biological and conservation data for more than 30 species of sturgeons (Acipenseridae), paddlefishes (Polyodontidae) and their fossil allies in the order Acipenseriformes. Since the Jurassic, the four families of sturgeon-like fish have been restricted to the Holarctic, where until very recently they flourished in most major river systems. Today, however, virtually all species of sturgeons and paddlefishes face difficult conservation issues. Papers in the first section of this volume examine paleontology, systematics, evolution and basic biology of Acipenseriformes. The second section of this volume details current conservation status for most of the world's living species of Acipenseriformes. These papers mark the first attempt to make such a global review of recent data from across the northern hemisphere. The emerging picture is discouraging, for negative anthropogenic impacts range from overfishing to water pollution, to dams and water diversion projects, and all species are threatened to some degree. The third section of the volume considers specific human impacts and responses to conservation issues. These include: the Aral Sea ecological disaster and its impact on native sturgeons; a review of methods for restoring sturgeon populations; the use of molecular techniques in developing conservation strategies; the extreme sensitivity of sturgeons and paddlefishes to overfishing; and the history of a recently convicted caviar poaching ring. The volume's summary reviews the status of all extant species and notes future directions for research on behavior, ecology and population biology that could lead to better co-ordinated international conservation efforts.
Author: C. Richard Robins
Publisher: Houghton Mifflin Harcourt
ISBN: 9780395975152
Category : Nature
Languages : en
Pages : 508
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Book Description
The more than 1,000 species descriptions in this guide include information on range and habitat such as depths, bottom types, water temperatures, and salinity. The almost 1,100 illustrations use the Peterson Identification System for quick, accurate field identification.
Author:
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 40
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Book Description
The Gulf sturgeon population in the Pearl River was monitored from 1992 through 1996 and compared to historical data sets from the 1960s and 1980s. The estimated population sire iii 1996 was approximately 300 fish with adults comprising about 3 percent of the population. Annual mortality rates in the late 1960s were about 9 percent; these rates increased to almost 40 percent in 1985 and decreased to about 26 percent during 1992 through 1996. Population modeling was used to evaluate the sturgeon's status and recovery potential. Results of models suggest that this population can only withstand mortality rates in the range of 13 to 18 percent, depending upon recruitment assumptions. Population models indicated that catch and fishing effort data specified in the Gulf Sturgeon Recovery Plan may not detect a declining population. Population models can be used to simulate annual variation in population sire under different rates of mortality. Recovery goals can address a specific source of mortality simulated in the model and monitoring can determine the success of recovery efforts. Population modeling does not require considerably more effort or expertise over that already required to conduct monitoring studies.
Author: John Tee-Van
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 316
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Book Description
Author: Lawrence M. Page
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 554
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Book Description
Field guide of Freshwater fish.
Author: Charles H. Wharton
Publisher:
ISBN:
Category : Ecological succession
Languages : en
Pages : 158
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Book Description
Author: United States. National Marine Fisheries Service
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 12
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Book Description
