New Glass Sponges (Porifera:Hexactinellida) from Deep Waters of the Central Aleutian Islands, Alaska PDF Download
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Author: Henry Michael Reiswig
Publisher:
ISBN: 9781775571285
Category : Hexactinellida
Languages : en
Pages : 64
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Book Description
Author: Henry Michael Reiswig
Publisher:
ISBN: 9781775571285
Category : Hexactinellida
Languages : en
Pages : 64
Get Book Here
Book Description
Author: Henry Michael Reiswig
Publisher:
ISBN: 9781775571292
Category : Hexactinellida
Languages : en
Pages : 64
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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: Robert P. Stone
Publisher:
ISBN:
Category : Sponges
Languages : en
Pages : 206
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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: Helmut Lehnert
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
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Book Description
Author: Robert P.. Stone
Publisher:
ISBN:
Category : Sponges
Languages : en
Pages : 187
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Book Description
"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.
Author: Robert P. Stone
Publisher:
ISBN:
Category : Hexactinellida
Languages : en
Pages : 31
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Book Description
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.
Author: David Thomas Drumm
Publisher:
ISBN:
Category : Marine animals
Languages : en
Pages : 308
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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: John N.A. Hooper
Publisher: Springer Science & Business Media
ISBN: 1461507472
Category : Science
Languages : en
Pages : 1779
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Book Description
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.
Author: Mariana M. Hogg
Publisher:
ISBN: 9789280730814
Category : Marine biodiversity conservation
Languages : en
Pages : 0
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Book Description
Author: Zhiyong Li
Publisher: Springer
ISBN: 9402416129
Category : Science
Languages : en
Pages : 570
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Book Description
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.
