A Guide to the Deep-water Sponges of the Aleutian Island Archipelago PDF Download
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Author: Robert P. Stone Publisher: ISBN: Category : Sponges Languages : en Pages : 206
Book Description
Furthermore, sponges are extremely fragile and easily damaged by contact with fishing gear. High rates of fishery bycatch clearly indicate a strong interaction between existing fisheries and sponge habitat. Bycatch in fisheries and fisheries-independent surveys can be a major source of information on the location of the sponge fauna, but current monitoring programs are greatly hampered by the inability of deck personnel to identify bycatch. This guide contains detailed pecies descriptions for 112 sponges collected in Alaska, principally in the central Aleutian Islands. It addresses bycatch identification challenges by providing fisheries observers and scientists with the information necessary to adequately identify sponge fauna.Using that identification data, areas of high abundance can be mapped and the locations of indicator species of vulnerable marine ecosystems can be determined.
Author: Robert P. Stone Publisher: ISBN: Category : Sponges Languages : en Pages : 206
Book Description
Furthermore, sponges are extremely fragile and easily damaged by contact with fishing gear. High rates of fishery bycatch clearly indicate a strong interaction between existing fisheries and sponge habitat. Bycatch in fisheries and fisheries-independent surveys can be a major source of information on the location of the sponge fauna, but current monitoring programs are greatly hampered by the inability of deck personnel to identify bycatch. This guide contains detailed pecies descriptions for 112 sponges collected in Alaska, principally in the central Aleutian Islands. It addresses bycatch identification challenges by providing fisheries observers and scientists with the information necessary to adequately identify sponge fauna.Using that identification data, areas of high abundance can be mapped and the locations of indicator species of vulnerable marine ecosystems can be determined.
Author: David Thomas Drumm Publisher: ISBN: Category : Marine animals Languages : en Pages : 308
Book Description
A current and comprehensive species list of marine invertebrates of Alaska is essential for effective management of living marine resources, sustainable fisheries, conservation of vulnerable ecosystems, and advancement of our knowledge of biodiversity and ecosystem function. Furthermore, the most current checklist available to resource managers and scientists is quite dated and limited in that it only includes the marine invertebrates of the southern coast of Alaska to California. Since that checklist was published, many new species have been described, many range extensions have been discovered, and considerable changes in higher-level systematics have been made. The checklist that we have compiled lists 3708 species and presents for each species the currently accepted scientific name and its significant synonyms, common names, type localities, geographic and depth distributions, a general statement of abundance in Alaska when known (e.g., rare, uncommon, common, abundant), and general remarks. It includes species recorded in the marine waters of Alaska from the intertidal zone, continental shelf, and upper continental slope to abyssal depths, from the Beaufort Sea at the Arctic border with Yukon, Canada; the eastern Chukchi Sea, the eastern Bering Sea, the Aleutian Islands to the western border with Russia; and the Gulf of Alaska to Dixon Entrance at the southern border with British Columbia. Sound and reliable taxonomic identifications are necessary to monitor and predict changes in the distribution and abundance of marine species. The current status and future direction of the study of Alaskan marine invertebrate biodiversity are briefly discussed.
Author: Henry Michael Reiswig Publisher: ISBN: 9781775571292 Category : Hexactinellida Languages : en Pages : 64
Book Description
Hexactinellida from deep-water communities of the central Aleutian Islands, Alaska, are described. They were mostly collected by the remotely operated vehicle 'Jason II' from 494-2311 m depths during a 2004 RV 'Roger Revelle' expedition, but one shallow-water species collected with a shrimp trawl from 155 m in the same area is included. The excellent condition of the ROV-collected specimens enabled valuable redescription of some species previously known only from badly damaged specimens. New taxa include one new genus and eight new species in five families. Farreidae consist of two new species, Farrea aleutiana and F. aspondyla. Euretidae consists of only Pinulasma fistulosum n. gen., n. sp. Tretodictyidae include only Tretodictyum amchitkensis n. sp. Euplectellidae consists of only the widespread species Regadrella okinoseana Ijima, reported here over 3,700 km from its closest previously known occurrence. The most diverse family, Rossellidae, consists of Aulosaccus ijimai (Schulze), Aulosaccus schulzei Ijima, Bathydorus sp. (young stage not determinable to species), Caulophacus (Caulophacus) adakensis n. sp., Acanthascus koltuni n. sp., Staurocalyptus psilosus n. sp., Staurocalyptus tylotus n. sp. and Rhabdocalyptus mirabilis Schulze. We present argument for reinstatement of the abolished rossellid subfamily Acanthascinae and return of the subgenera Staurocalyptus Ijima and Rhabdocalyptus Schulze to their previous generic status. These fauna provides important complexity to the hard substrate communities that likely serve as nursery areas for the young stages of commercially important fish and crab species, refuge from predation for both young and adult stages, and also as a focal source of prey for juvenile and adult stages of those same species.
Author: Welton L. Lee Publisher: ISBN: Category : Science Languages : en Pages : 422
Book Description
The California Sponges project Addresses two basic needs. Need to organize and codify the minimal and cattered accounts of California Sponges so that more detailed and meaningful work on their systematics could begin. Need to create a key useable by experts as well as by ecologists, biologists, products chemists or students to identify California Sponges. Meeting these needs has required the profuseuse of illustrations so that misinterpretation would be minimal.
Author: Alex D. Rogers Publisher: DIANE Publishing ISBN: 1437987796 Category : Technology & Engineering Languages : en Pages : 50
Book Description
Describes major shortcomings in the implementation of U.N. General Assembly resolutions designed to protect the deep-ocean from the destructive impact of fishing. This is the first comprehensive scientific review of the mgmt. of deep-sea fishing on the high seas globally, this report examines the data available from Regional Fisheries Management Organization (RFMOs), the bodies tasked with implementing the U.N. resolutions. It concludes that ¿RFMOs are failing to manage deep-sea bottom fisheries on the high seas sustainably with respect to target and by-catch species. For most fisheries there is little or no info. on the status of stocks and in many cases we do not even know what is being caught where." Illus. A print on demand report.
Author: DK Publisher: Penguin ISBN: 1465436200 Category : Science Languages : en Pages : 514
Book Description
This new edition of Ocean has been updated with fresh graphics, images, and type styling throughout, and includes new coverage of major events such as Hurricane Sandy and the Japan tsunami. DK's Ocean is a highly illustrated encyclopedia of the marine environment. It not only covers marine life and physical oceanography, from the geology of the seafloor to the chemistry of seawater, but also includes an atlas of the world's oceans and seas compiled using satellite data. Visual catalogs throughout the book contain profiles of living organisms and key locations. With comprehensively updated text, artwork, and images, the second edition of DK's exhaustive guide to the underwater world is the most definitive visual guide to the world's oceans on the market.
Author: Robert P. Stone
Author: Robert P. Stone
Author: Robert P. Stone
Author: David Thomas Drumm
Author: Henry Michael Reiswig
Author: Robert P. Stone
Author: Henry Michael Reiswig
Author: Welton L. Lee
Author: Helmut Lehnert
Author: Alex D. Rogers
Author: DK