Download or read book Use of Population Modeling to Enhance the Gulf Sturgeon Recovery Plan written by and published by . This book was released on 1998 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Fish Passage Through Dams in Large Temperate Floodplain Rivers written by and published by . This book was released on 2001 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery Plan for the Pallid Sturgeon Scaphirhynchus Albus written by Mark P. Dryer and published by . This book was released on 1993 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book MRGO Ecosystem Restoration Plan Feasibility Study written by United States. Office of the Assistant Secretary of the Army (Civil Works) and published by . This book was released on 2013 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of the Interior and Related Agencies Appropriations for 1999 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1998 with total page 1820 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of the Interior and Related Agencies Appropriations for 1999 Justification of the budget estimates U S Geological Survey written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1998 with total page 1826 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2014 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of the Interior and Related Agencies Appropriations for 1994 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1993 with total page 1786 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Marine Conservation News written by and published by . This book was released on 1991 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Endangered and Threatened Species of the Platte River written by National Research Council and published by National Academies Press. This book was released on 2005-02-24 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The tension between wildlife protection under the Endangered Species Act and water management in the Platte River Basin has existed for more than 25 years. The Platte River provides important habitat for migratory and breeding birds, including three endangered or threatened species: the whooping crane, the northern Great Plains population of the piping plover, and the interior least tern. The leading factors attributed to the decline of the cranes are historical overhunting and widespread habitat destruction and, for the plovers and terns, human interference during nesting and the loss of riverine nesting sites in open sandy areas that have been replaced with woodlands, sand and gravel mines, housing, and roadways. Extensive damming has disrupted passage of the endangered pallid sturgeon and resulted in less suitable habitat conditions such as cooler stream flows, less turbid waters, and inconsistent flow regimes. Commercial harvesting, now illegal, also contributed to the decline of the sturgeon. Endangered and Threatened Species of the Platte River addresses the habitat requirements for these federally protected species. The book further examines the scientific aspects of the U.S. Fish and Wildlife Service's instream-flow recommendations and habitat suitability guidelines and assesses the science concerning the connections among the physical systems of the river as they relate to species' habitats.

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment of Sea Turtle Status and Trends written by National Research Council and published by National Academies Press. This book was released on 2010-10-07 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: All six species of sea turtles found in U.S. waters are listed as endangered or threatened, but the exact population sizes of these species are unknown due to a lack of key information regarding birth and survival rates. The U.S. Endangered Species Act prohibits the hunting of sea turtles and reduces incidental losses from activities such as shrimp trawling and development on beaches used for nesting. However, current monitoring does not provide enough information on sea turtle populations to evaluate the effectiveness of these protective measures. Sea Turtle Status and Trends reviews current methods for assessing sea turtle populations and finds that although counts of sea turtles are essential, more detailed information on sea turtle biology, such as survival rates and breeding patterns, is needed to predict and understand changes in populations in order to develop successful management and conservation plans.

Download or read book Department of the Interior and Related Agencies Appropriations for 2001 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 2000 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of the Interior and Related Agencies Appropriations for 2001 U S Geological Survey Minerals Management Service Office of Surface Mining Reclamation and Enforcement written by United States. Congress. House. Committee on Appropriations. Subcommittee on Dept. of the Interior and Related Agencies and published by . This book was released on 2000 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 106 2 Hearings Department of The Interior and Related Agencies Appropriations for 2001 Part 8 March 16 2000 written by and published by . This book was released on 2000 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of the Interior and Related Agencies Appropriations for 2001 U S Geological Survey written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 2000 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: