Download or read book New Glass Sponges Porifera Hexactinellida from Deep Waters of the Central Aleutian Islands Alaska written by Henry Michael Reiswig and published by . This book was released on 2013 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Glass Sponges Porifera Hexactinellida from Deep Waters of the Central Aleutian Islands Alaska written by Henry Michael Reiswig and published by . This book was released on 2013 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book A Guide to the Deep water Sponges of the Aleutian Island Archipelago written by Robert P. Stone and published by . This book was released on 2011 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book An Annotated Checklist of the Marine Macroinvertebrates of Alaska written by David Thomas Drumm and published by . This book was released on 2016 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book New Species of Deep sea Demosponges Porifera from the Aleutian Islands Alaska USA written by Helmut Lehnert and published by . This book was released on 2006 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Guide to the Deep water Sponges of the Aleutian Island Archipelago written by Robert P.. Stone and published by . This book was released on 2011 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The first dedicated collections of deep-water (>80 m) sponges from the central Aleutian Islands revealed a rich fauna including 28 novel species and geographical range extensions for 53 others. Based on these collections and the published literature, we now confirm the presence of 125 species (or subspecies) of deep-water sponges in the Aleutian Islands. Clearly the deep-water sponge fauna of the Aleutian Islands is extraordinarily rich and largely understudied. Submersible observations revealed that sponges, rather than deep-water corals, are the dominant feature shaping benthic habitats in the region and hat they provide important refuge habitat for many species of fish and invertebrates including juvenile rockfish (Sebastes spp.) and king crabs (Lithodes sp). Examination of video footage collected along 127 km of the seafloor further indicate that there are likely hundreds of species still uncollected from the region, and many unknown to science. 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 species 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. The guide is also designed for use by scientists making observations of the fauna in situ with submersibles, including remotely operated vehicles and autonomous underwater vehicles"--Abstract.
Download or read book The Boundary Reefs written by Robert P. Stone and published by . This book was released on 2014 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hexactinellid sponge reefs have been discovered in shallow-water areas in Portland Canal on the international boundary between Southeast Alaska and British Columbia. The reefs were first observed on multibeam imagery data collected in 2008 and were examined in detail with a survey undertaken with a remotely operated vehicle in April 2010. The Boundary Reefs consist of three distinct reef areas at depths between 53 and 107 m. Framework constructing, dictyonine sponges (Aphrocallistes vastus, Heterochone calyx, and Farrea occa) form bioherms up to 200 m in diameter and 21 m in height on glacial sediments, and extensive beds on moraines and glacial promontories. Variations in the morphology and structure of some of the Portland Canal reefs are attributed to variations in sedimentation compared to other shelf and fjord reef sites in British Columbia. Development of extensive oxide crusts, pervasive colonization by zooanthid corals on reef surfaces, and the largely skeletal nature of the reefs suggest very low sedimentation rates as a result of low overall riverine inflow to the surface waters of the fjord and possibly reduced glacial meltwater input in recent years. A second complex of small reefs was discovered near Benjamin Island north of Juneau, Alaska. These reefs are the northernmost documented in the world and are very shallow, occurring at depths between 22 and 56 m. The two newly discovered reef sites are separated by almost 500 km indicating that the Inside Passage of Southeast Alaska may harbour additional undiscovered sponge reefs.
Download or read book Predicting Glass Sponge Porifera Hexactinellida Distributions in the North Pacific Ocean and Spatially Quantifying Model Uncertainty written by Fiona Davidson and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Marine Fauna of New Zealand written by Henry M. Reiswig and published by . This book was released on 2018 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Glass sponges in the Family Euplectellidae (basket glass sponges) found in the New Zealand Exclusive Economic Zone (EEZ) are reviewed and revised by studying existing and new collections within the NIWA Invertebrate Collection (NIC), Museum of New Zealand Te Papa Tongarewa (NMNZ) and specimens from the NORFANZ mid-Tasman Sea survey, housed at the Queensland Museum in Brisbane. Studying these collections has yielded well over 250 catalogued specimens, some of which are from the Australian EEZ and International waters"--Page 9.
Download or read book The Marine Fauna of New Zealand written by Henry M. Reiswig and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Glass sponges in the Family Euplectellidae (basket glass sponges) found in the New Zealand Exclusive Economic Zone (EEZ) are reviewed and revised by studying existing and new collections within the NIWA Invertebrate Collection (NIC), Museum of New Zealand Te Papa Tongarewa (NMNZ) and specimens from the NORFANZ mid-Tasman Sea survey, housed at the Queensland Museum in Brisbane. Studying these collections has yielded well over 250 catalogued specimens, some of which are from the Australian EEZ and International waters"--Page 9.
Download or read book Systema Porifera written by John N.A. Hooper and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1779 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research whilst compiling this book has uncovered a fauna about twice the size as that previously published in the literature and consequently Systema Porifera revises and stabilizes the systematics of the phylum to accommodate this new knowledge in a contemporary framework. Practical tools (key illustrations, descriptions of character) are provided to facilitate the assignment of approximately 680 extant and 100 fossil genera. Systema Porifera is unique making sponge taxonomy widely available at the practical level of classification (genera, families, order). It is a taxonomic revision of sponges and spongiomorphis (such as sphinctozoans and archaeocyathans) based on re-evaluation of type materials and evidence. It is also a practical guide to sponge identification providing descriptions and illustrations of characters and interpretation of their importance to systematics. Systema Porifera addresses many long standing nomenclatural problems and provides a sound baseline for future debate on sponges and their place in time and space. Systema Porifera describes 3 classes, 7 subclasses, 24 orders, 127 families and 682 valid genera of extant sponges (with over 1600 nominal generic names and an additional 500 invalid names treated). Treatment of the fossil fauna is less comprehensive or critical, although 6 classes, 30 orders, 245 families and 998 fossil genera are mentioned. Keys to all recent and many fossil taxa are provided.
Download or read book Deep sea Sponge Grounds written by Mariana M. Hogg and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Symbiotic Microbiomes of Coral Reefs Sponges and Corals written by Zhiyong Li and published by Springer. This book was released on 2019-06-07 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the symbiotic microbiomes of invertebrates in coral reefs, especially sponges and corals. It provides in-depth and up-to-date reviews on the microbial structure and diversity, metabolism and function, symbiosis and coevolution, environment and adaption, and bioactive potentials. Meanwhile, the future perspectives will be discussed according to the existing problems and the development trend. This book will be of particular interest to the professionals in marine ecology, marine biotechnology, as well as medicinal chemists and molecular biologists.
Download or read book Porifera Research written by Márcio Reis Custódio and published by . This book was released on 2007 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the Workshop on Deep Sea Species Identification written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2011 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Annotated global checklist of extant deep-sea chondrichthyans": p. 49-76.
Download or read book Adaptation and Evolution in Marine Environments Volume 2 written by Cinzia Verde and published by Springer. This book was released on 2014-11-09 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second volume of “Adaptation and Evolution in Marine Environments – The Impacts of Global Change on Biodiversity” from the series “From Pole to Pole” integrates the marine biology contribution of the first tome to the IPY 2007-2009, presenting overviews of organisms (from bacteria and ciliates to higher vertebrates) thriving on polar continental shelves, slopes and deep sea. The speed and extent of warming in the Arctic and in regions of Antarctica (the Peninsula, at the present ) are greater than elsewhere. Changes impact several parameters, in particular the extent of sea ice; organisms, ecosystems and communities that became finely adapted to increasing cold in the course of millions of years are now becoming vulnerable, and biodiversity is threatened. Investigating evolutionary adaptations helps to foresee the impact of changes in temperate areas, highlighting the invaluable contribution of polar marine research to present and future outcomes of the IPY in the Earth system scenario.
Download or read book Deep Survival Who Lives Who Dies and Why written by Laurence Gonzales and published by W. W. Norton & Company. This book was released on 2004-10-17 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Unique among survival books... stunning... enthralling. Deep Survival makes compelling, and chilling, reading."—Penelope Purdy, Denver Post In ?Deep Survival?, Laurence Gonzalez combines hard science and powerful storytelling to illustrate the mysteries of survival, whether in the wilderness or in meeting any of life's great challenges. This gripping narrative, the first book to describe the art and science of survival, will change the way you see the world. Everyone has a mountain to climb. Everyone has a wilderness inside.
