00000nam 2200000zi 4500 9.926099 CaOODSP 20230821133812 m o d f cr mn||||||||| 230814t20232023nscab ob f000 0 eng d 9780660499604 CaOODSP eng rda CaOODSP eng eng fre ln----- r------ n-cn-nu n-cn-qu y1y1 Fs97-6/3559E-PDF Odenthal, Brighid, author. Sponges from the 2010-2014, and 2017 Paamiut, and 2019 Helga Maria multispecies trawl surveys, eastern Arctic and subarctic : class Demospongiae, subclass Heteroscleromorpha, order Poecilosclerida, family Iotrochotidae / by Brighid Odenthal, Pilar Rios, Francisco Javier Murillo, Wojciech Walkusz, Javier Cristobo, Ellen Kenchington. Dartmouth, N.S., Canada : Ocean and Ecosystem Sciences Division, Maritimes Region, Fisheries and Oceans Canada, Bedford Institute of Oceanography, 2023. ©2023 1 online resource (v, 44 pages) : colour illustrations, colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3559 Includes bibliographical references (pages 40-42). "Sponges (phylum Porifera) play an important role in habitat creation and nutrient cycling. However, despite these key functional roles, sponge communities in Arctic marine environments are still poorly known. Sponges were collected between 2010-2014, in 2017 and in 2019 during annual multispecies trawl surveys conducted by Fisheries and Oceans Canada in Baffin Bay, Davis Strait and portions of Hudson Strait. They were taxonomically examined under a microscope. Approximately 2800 sponge specimens were identified, comprising ~100 known sponge taxa. Here, results from the analysis of the family Iotrochotidae Dendy, 1922 are presented. This family currently has 6 genera and 35 valid species and is characterized by the possession of birotula microscleres in its skeleton. Thirty specimens collected from 442 to 1319 m depth were examined. Five taxa have been identified, all of them belonging to the Genus Iotroata (Laubenfels, 1936). Most of our specimens are Iotroata affinis (Lundbeck, 1905). The other described species include Iotroata polydentata (Lundbeck, 1905), as well as Iotroata sp.1, Iotroata sp.2, and Iotroata sp.3., which are likely new species. For each species a physical description, a discussion of their distinguishing characteristics, the dimensions and descriptions of their spicules, and a taxonomic discussion is included"--Abstract, page iv. Includes abstracts in English and French. Poecilosclerida Baffin Bay (North Atlantic Ocean) Poecilosclerida Davis Strait. Poecilosclerida Hudson Strait (Québec and Nunavut) Zoological surveys Baffin Bay (North Atlantic Ocean) Zoological surveys Davis Strait. Zoological surveys Hudson Strait (Québec and Nunavut) Pœcilosclerida Baffin, Baie de. Pœcilosclerida Davis, Détroit de. Pœcilosclerida Hudson, Détroit d' (Québec et Nunavut) Inventaires fauniques Baffin, Baie de. Inventaires fauniques Davis, Détroit de. Inventaires fauniques Hudson, Détroit d' (Québec et Nunavut) Canada. Department of Fisheries and Oceans, issuing body. Bedford Institute of Oceanography, issuing body. Canadian technical report of fisheries and aquatic sciences ; 3559. (CaOODSP)9.504449 PDF 2.50 MB https://publications.gc.ca/collections/collection_2023/mpo-dfo/Fs97-6-3559-eng.pdf