Download or read book Bycatch Reduction Devices for Responsible Shrimp Trawling written by M. R. Boopendranath and published by . This book was released on 2012 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Guide to Bycatch Reduction in Tropical Shrimp trawl Fisheries written by Steve Eayrs and published by Food & Agriculture Org.. This book was released on 2007 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bycatch is the unwanted or non-target part of the catch taken by fishermen. It is either discarded at sea or used for human or animal consumption. The capture of bycatch may pose a threat to species diversity and ecosystem health because this part of the catch is usually unregulated. In tropical shrimp-trawl fisheries, bycatch often consists of juvenile food-fish species and is therefore a threat to food security and sustainable fisheries production. Bycatch is a global problem that must be addressed. This Guide to Bycatch Reduction in Tropical Shrimp-Trawl Fisheries is designed for fishermen, net makers, fishing technologists and others interested in a practical guide to the design, use and operation of effective bycatch reduction devices. Fishery managers, policy-makers and legislators will find this guide useful to help develop specifications governing the design and application of these devices in a shrimptrawl fishery. The issue of bycatch is not going away and scrutiny of fishing activity is increasing. All fishermen are strongly urged to use appropriate bycatch reduction measures to help maintain the productivity of the fishery and the long term prosperity of the fishing industry. By responding appropriately, fishermen can help to protect the marine environment and assist global food security both now and in the future. Also published in French and Spanish.

Download or read book Evaluations of Turtle Excluder Device TED Performance in the U S Southeast Atlantic and Gulf of Mexico Skimmer Trawl Fisheries written by Blake Price and published by . This book was released on 2011 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Skimmer trawls are utilized throughout the southeastern United States to target penaeid shrimp (Penaeidae). Skimmer trawls consist of nets attached to rigid frames on each side of the vessel that are pushed through the water column. Once the frames and nets are lowered into the water, only the cod ends are retrieved to remove the catch, while the mouths of the skimmer trawls continually fish. Because the cod ends can be readily retrieved, skimmer trawls are allowed to utilize restricted tow times (55 and 75 minute, seasonally) in lieu of TED requirements as a sea turtle bycatch mitigation measure. However, observations aboard commercial vessels indicate that tow times are often exceeded (Scott-Denton et al. 2006). Recently, a mass stranding event occurring in the late spring 2010 along the Mississippi Gulf Coast was attributed to skimmer trawl activity. To address this potential problem, the NMFS SEFSC Harvesting Systems Unit investigated the feasibility of TED use in these fisheries. Utilizing multiple commercial vessels, paired comparisons designed to examine target shrimp catch retention, bycatch reduction and gear usability associated with TED use were conducted. During testing, a TED was installed in one net, while the other was left naked (no TED installed) with the TED switched between nets daily to remove potential vessel side bias. Various TED configurations were tested in Mississippi, Alabama (2008 and 2009) and North Carolina (2010). Results from these studies indicate that TEDs can function effectively in commercial skimmer trawl operations with a relatively minimal reduction in target shrimp catch, which ranged from an increase of 1.3% to a reduction of 11%. In addition, unwanted bycatch (e.g., skates, teleost fish) was significantly reduced on most operations. Fishermen were surveyed and results indicate that fishermen highly favored the levels of bycatch reduction observed. In addition, there were no sea turtle interactions observed in skimmer trawls equipped with TEDs and three sea turtle captures were observed in control nets without TEDs. However, due to the small sample size these results were not statistically significant. Results of these studies and post interviews with the contracted fishermen indicate that TEDs are a viable management option for the reduction of sea turtle bycatch in skimmer trawls. While shrimp loss was observed, reductions associated with TED use were minimal. The SEFSC Harvesting Systems staff will continue to work with the industry to develop the most efficient TEDs for these trawl fisheries with the goal of reducing bycatch and minimizing shrimp losses to the greatest extent possible. Testing of several different TED configurations is slated for North Carolina and Louisiana during the 2011 shrimp season"--Abstract.

Download or read book Library of Congress Subject Headings written by Library of Congress and published by . This book was released on 2013 with total page 1624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluations of Turtle Excluder Devices TEDs with Reduced Bar Spacing in the Inshore Penaid Shrimp Fishery of the Northern Gulf of Mexico written by Dominy Hataway and published by . This book was released on 2016 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Turtle Excluder Devices (TEDs) have been required in the southeastern United States penaeid shrimp trawl fishery since 1989 to reduce the mortality of sea turtles associated with shrimp trawling. TEDs are metal sorting grids placed in the trawl forward of the codend. Larger animals, such as sea turtles, are directed to an escape opening in the trawl, while smaller ones, including shrimp, pass through the grid bars and into the codend. Federal TED requirements set the maximum bar spacing for the TED grid at 4 inches (10.2 cm) due to the size range of sea turtles that were encountered when the regulation was enacted. To explore the additional bycatch reduction benefit that may be achieved by reducing the maximum TED bar spacing, the NOAA Southeast Fisheries Science Center (SEFSC) conducted a series of experiments to evaluate TEDs with bar spacing of 2-inches (5.1 cm). Two prototype TED designs, a 2-inch and a 2-inch staggered bar (SB) TED, were compared to identical TED designs with 4-inch bar spacing (controls) during paired trials conducted in the inshore shrimp fishery of the northern Gulf of Mexico. The results of the study show that the 2-inch and the 2-inch SB TED, reduce the targeted shrimp catch by a statistically significant amount, 8.8% and 4.5% respectively. Both experimental TED designs reduced the bycatch of croaker (Micropogonias undulates), the most abundant bycatch species. However, only the 2-inch TED showed a significant reduction (30.7%, p

Download or read book A Global Assessment of Fisheries Bycatch and Discards written by Dayton L. Alverson and published by Food & Agriculture Org.. This book was released on 1994 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors estimate that between 17.9 and 39.5 million tons (average 27.0 million) of fish are discarded each year in commercial fisheries. These estimates are based on a review of over 800 papers. The highest quantities of discards are from the Northwest Pacific while tropical shrimp trawl fisheries generate a higher proportion of discards than any other fishery type, accounting for one third of the global total. Of four major gear groups, shrimp trawls stand alone at the top of the list; bottom trawls, long-lines and pot fisheries come next. The third group consists of Japanese high-seas drift net fisheries, Danish seines and purse seines for capelin. Relatively low levels result from pelagic trawls, small pelagic purse seines and some of high seas drift nets. The authors point to inadequate data to determine the biological, ecological, economic and cultural impacts of discards although economic losses run to billions of dollars. However, it appears most likely that socio-cultural attitudes towards marine resources will guide international discard policies. Techniques to reduce bycatch levels including traditional net selectivity, fishing gear development and time/area restrictions, are discussed. Effort reduction, incentive programmes and individual transferable quotas (that make the vessel responsible for bycatch reduction) are seen as promising avenues for the future. However, quick solutions to the problem are unlikely and much more information is required. The publication includes a diskette with the complete Bycatch Database, which was compiled for the study, and a summary of it.

Download or read book Discards in the World s Marine Fisheries written by Kieran Kelleher and published by Food & Agriculture Org.. This book was released on 2005 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication gives an updated review of the quantity of discards in the world's marine fisheries, using information from a broad range of fisheries in all continents. A number of policy issues are discussed including a 'no discards' approach to fisheries management, the need for balance between bycatch reduction and bycatch utilisation initiatives, and concerns arising from incidental catches of marine mammals, birds and reptiles. The report also highlights the need for more robust methods of estimating discards, and the development of bycatch management plans.

Download or read book Library of Congress Subject Headings written by Library of Congress. Cataloging Policy and Support Office and published by . This book was released on 2007 with total page 1806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of the Expert Workshop on means and methods for reducing marine mammal mortality in fishing and aquaculture operations written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-08-29 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop discussed current knowledge on marine mammal bycatch questions, evaluated the efficacy of measures for mitigating bycatch, reviewed techniques across different gear types and recommended that FAO develop Technical Guidelines.

Download or read book Voyage of the Turtle written by Carl Safina and published by Henry Holt and Company. This book was released on 2007-04-01 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: The story of an ancient sea turtle and what its survival says about our future, from the award-winning writer and naturalist Though nature is indifferent to the struggles of her creatures, the human effect on them is often premeditated. The distressing decline of sea turtles in Pacific waters and their surprising recovery in the Atlantic illuminate what can go both wrong and right from our interventions, and teach us the lessons that can be applied to restore health to the world's oceans and its creatures. As Voyage of the Turtle, Carl Safina's compelling natural history adventure makes clear, the fate of the astonishing leatherback turtle, whose ancestry can be traced back 125 million years, is in our hands. Writing with verve and color, Safina describes how he and his colleagues track giant pelagic turtles across the world's oceans and onto remote beaches of every continent. As scientists apply lessons learned in the Atlantic and Caribbean to other endangered seas, Safina follows leatherback migrations, including a thrilling journey from Monterey, California, to nesting grounds on the most remote beaches of Papua, New Guinea. The only surviving species of its genus, family, and suborder, the leatherback is an evolutionary marvel: a "reptile" that behaves like a warm-blooded dinosaur, an ocean animal able to withstand colder water than most fishes and dive deeper than any whale. In his peerless prose, Safina captures the delicate interaction between these gentle giants and the humans who are finally playing a significant role in their survival. "Magnificent . . . A joyful, hopeful book. Safina gives us ample reasons to be enthralled by this astonishing ancient animal—and ample reasons to care." -- The Los Angeles Times

Download or read book Advances in Harvest and Post Harvest Technology of Fishes written by D.D. Nambudiri: and published by NIPA GENX ELECTRONIC RESOURCES & SOLUTIONS P. LTD.. This book was released on 2012-01-15 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years there have been notable advances in the fisheries. Progresses made in refinements of vessels, new line materials and line-handling systems, preserving the catch, the availability of oceanographic-sensor equipments and the utilization of satellite technology to locate potential fishing grounds have greatly improved the fishing power of longline vessels. Post harvest technology of fish has evolved in the last one decade to a more energy-efficient, cost-effective, and quality upgrading technology. Since fresh fish can get spoiled very quickly, the development of technology for post-harvest preservation and methodology to convert fish to value added products have also become popular in recent times. Value addition helps in getting high price for the fishery products. There is a need to develop competent human resources in the field of post harvest management of fish and production of value added products from them. It is required to inculcate vocational and entrepreneurial skills in order to widen employment opportunities, particularly among rural youth and the disadvantaged sections of the society as well as to enable self employment.

Download or read book Recovery Plan for U S Population of Atlantic Green Turtle Chelonia Mydas written by and published by . This book was released on 1991 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 2012 Turtle Excluder Device Testing and Gear Evaluations written by Jeff Gearhart and published by . This book was released on 2015 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NOAA National Marine Fisheries Service (NMFS), Southeast Fisheries Science Center (SEFSC), Mississippi Laboratory, Harvesting Systems & Engineering Branch conducted fishing gear evaluations in Panama City, Florida from June 5 through June 20, 2012. Four separate projects were conducted: 1) evaluation of Turtle Excluder Devices (TEDs) in skimmer trawls; 2) evaluation of Cable TEDs in fish trawls; 3) sea turtle exclusion rate trials for TED component variations; 4) evaluation of Bycatch Reduction Devices (BRDs) in shrimp trawls. Skimmer trawl TED evaluations were conducted aboard two contracted commercial vessels. Divers evaluated three different size TEDs installed at various locations to determine optimum TED size and placement. Divers found that TEDs installed in skimmer trawls are very similar to TEDs installed in otter trawls with the same factors affecting their configuration and performance. Cable TED evaluations were also conducted aboard a contracted commercial vessel. Divers evaluated various configurations to improve performance of the Cable TED and found that the shape of the lead ring determined the shape of the TED flap. The Cable TED, which was designed as a top opening TED, was also evaluated in a bottom opening orientation. Divers found that the TED was poorly configured as a bottom opening TED and required major modifications to improve performance. Sea turtle exclusion rate trials were conducted aboard the NOAA/NMFS vessel R/V Caretta. This work was conducted to test variations in different components of existing shrimp trawl TED designs to determine their effect on sea turtle exclusion rates. Variations tested included TED angles, TED orientation, straight vs. curved deflector bars, and degree of overlap on double-cover flaps. A total of 163 two year old and 37 three year old captive reared loggerhead sea turtles (Caretta caretta) were utilized to complete this testing. All evaluations followed the small turtle testing protocol (Federal Register, Vol. 55, No. 195). Results indicate that sea turtle exclusion rates for high angle TEDs were lower when TEDs were installed in a bottom opening configuration. Exclusion rates were further reduced for high angle, bottom opening TEDs when configured with straight deflector bars. The R/V Caretta was also utilized to complete evaluations of two BRD designs. One was an industry prototype, the Burbank TED/BRD, which was similar to the original NMFS TED developed in the 1980s. The other was the certified Composite Panel BRD, which was evaluated in two configurations to examine clogging potential with locally obtained brown macroalgae, Sargassum natans. The Burbank TED/BRD had a good configuration with reduced water flow areas located at three locations within the device. The device was recommended for proof of concept testing to examine shrimp retention. The Composite Panel BRD was examined with the addition of a fish deflector cone installed in two different configurations behind the device. The standard two line attachment of the deflector cone was prone to clogging with algae, while an alternative one line attachment reduced clogging significantly. [doi:10.7289/V5JW8BTZ (http://dx.doi.org/10.7289/V5JW8BTZ)]

Download or read book Amendment Number 9 to Fishery Management Plan FMP for the Shrimp Fishery of the Gulf of Mexico Portions of the Exclusive Economic Zone EEZ TX LA MS AL FL written by and published by . This book was released on 1997 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecosystem Approach to Fisheries in the Mediterranean and Black Seas Advances in Research and Technologies written by Violin Stoyanov Raykov and published by Frontiers Media SA. This book was released on 2020-09-17 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Turtle Excluder Devices TEDs written by and published by . This book was released on 2010 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: