New Species of Deep-sea Demosponges (Porifera) from the Aleutian Islands (Alaska, USA)
Title | New Species of Deep-sea Demosponges (Porifera) from the Aleutian Islands (Alaska, USA) PDF eBook |
Author | Helmut Lehnert |
Publisher | |
Pages | 68 |
Release | 2006 |
Genre | |
ISBN |
Pacific Deep-Sea Discoveries: Geological and Biological Exploration, Patterns, and Processes
Title | Pacific Deep-Sea Discoveries: Geological and Biological Exploration, Patterns, and Processes PDF eBook |
Author | Randi D. Rotjan |
Publisher | Frontiers Media SA |
Pages | 374 |
Release | 2021-04-16 |
Genre | Science |
ISBN | 2889666824 |
New Glass Sponges (Porifera : Hexactinellida) from Deep Waters of the Central Aleutian Islands, Alaska
Title | New Glass Sponges (Porifera : Hexactinellida) from Deep Waters of the Central Aleutian Islands, Alaska PDF eBook |
Author | Henry Michael Reiswig |
Publisher | |
Pages | 64 |
Release | 2013 |
Genre | Hexactinellida |
ISBN | 9781775571292 |
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.
A Guide to the Deep-water Sponges of the Aleutian Island Archipelago
Title | A Guide to the Deep-water Sponges of the Aleutian Island Archipelago PDF eBook |
Author | Robert P. Stone |
Publisher | |
Pages | 206 |
Release | 2011 |
Genre | Sponges |
ISBN |
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.
New Glass Sponges (Porifera:Hexactinellida) from Deep Waters of the Central Aleutian Islands, Alaska
Title | New Glass Sponges (Porifera:Hexactinellida) from Deep Waters of the Central Aleutian Islands, Alaska PDF eBook |
Author | Henry Michael Reiswig |
Publisher | |
Pages | 64 |
Release | 2013 |
Genre | Hexactinellida |
ISBN | 9781775571285 |
A Guide to the Deep-water Sponges of the Aleutian Island Archipelago
Title | A Guide to the Deep-water Sponges of the Aleutian Island Archipelago PDF eBook |
Author | Robert P.. Stone |
Publisher | |
Pages | 187 |
Release | 2011 |
Genre | Sponges |
ISBN |
"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.
Twelve New Demospongiae (Porifera) from Chilean Fjords, with Remarks Upon Sponge-Derived Biogeographic Compartments in the SE Pacific
Title | Twelve New Demospongiae (Porifera) from Chilean Fjords, with Remarks Upon Sponge-Derived Biogeographic Compartments in the SE Pacific PDF eBook |
Author | Eduardo Hajdu |
Publisher | |
Pages | 64 |
Release | 2013 |
Genre | Demospongiae |
ISBN | 9781775573081 |