Miscellaneous Taxa Disclaimer: This Is Not a Complete Guide to the Trawl Fauna of the Pacific Arctic

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Miscellaneous Taxa Disclaimer: This Is Not a Complete Guide to the Trawl Fauna of the Pacific Arctic

Common Trawl Fauna in the Chukchi and Beaufort seas Miscellaneous Taxa Disclaimer: This is not a complete guide to the trawl fauna of the Pacific Arctic. There are many other species that are not presented in this guide. Most identifications of the depicted organisms have been verified by a variety of taxonomic experts but small taxonomic features may not be clearly visible in the images and could lead to confusion with similar taxa. As such, it is recommended that identification of new collections may be aided by this guide but that final identifications should be confirmed on vouchers by taxonomic experts. Katrin Iken, College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, USA (contact: [email protected]) Bodil Bluhm, UiT The Arctic University of Norway Version: January 2021 Boltenia ovifera Ascidiacea 2 cm 1 cm Boltenia villosa Can be fuzzy when small 1 cm Stalked Boltenia echinata Not stalked Distinct “spiky” tunic cover Halocynthia aurantium Ascidiacea 1 cm Styela rustica Often many small individuals 1 cm Dendrodoa lineata 1 cm Pelonaia corrugata 1 cm Ascidiacea Ascidia callosa 2 cm 2 cm Thick tunic Solitary tunicate Can be transparent or brownish Ascidia obliqua “eggplant” shape, large size 1 cm Adjacent siphons on upper surface Molgula retortiformis 1 cm Often overgrown Distinct “snorkel-like” siphon extension Ascidiacea Molgula griffithsii 1 cm Chelyosoma macleayanum 1 cm Distinct honey-comb pattern Often in groups On rocks or epizoic Ascidiacea Distaplia occidentalis 1 cm Distaplia alaskensis 1 cm Eudistoma parvum 1 cm Ascidiacea Synoicum pulmonaria Diplosoma listerianum 1 cm Encrusting, soft colony texture Polyclinum sp. 1 cm Large, oval-shaped, colonial Ascidiacea Didemnum albidum 1 cm 1 cm Usually white or grey, but can be pink Trididemnum sp. Ascidia grey or pink colonial, overgrowing other organisms Porifera Echinoclathria beringensis (previously: Phakellia) 1 cm Suberites luetkeni (previously: Choanites) 1 cm Semisuberites cribrosa (previously: Phakellia) Porifera 1 cm Polymastia sp 1 cm Vulcanella sp 1 cm Haliclona sp Halichondria sp 1 cm 1 cm Stomphia sp. Actiniaria 1 cm Hormathia nodosa 1 cm Allantactis parasitica Always attached to snail shells, common in Beaufort but not the Chukchi 1 cm Actiniaria Metridium sp. 1 cm Zoanthidea Actiniaria Amphianthus sp. 1 cm Anthosactis janmayeni 1 cm Flattened, but it can also be ball- or column-shaped Edwardsia sp Mostly buried in sediment Octocorallia Gersemia spp. (Nephtheidae) 1 cm Multiple species, some can only be distinguished microscopically Umbellula sp. Tubularia sp. 1 cm Lafoeina maxima Hydroidea Look like pipe cleaners Bryozoa Alcyonidium gelatinosum Can form strings several meters long 1 cm Alcyonidium disciforme 1 cm Eucratea loricata 1 cm 1 cm Greyish-colored dense bushes Many others…… Brachiopoda Brachiopoda 1 cm.

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Ascidian Cannibalism Correlates with Larval Behavior and Adult Distribution
FAU Institutional Repository http://purl.fcla.edu/fau/fauir This paper was submitted by the faculty of FAU’s Harbor Branch Oceanographic Institute. Notice: ©1988 Elsevier Ltd. The final published version of this manuscript is available at http://www.sciencedirect.com/science/journal/00220981 and may be cited as: Young, C. M. (1988). Ascidian cannibalism correlates with larval behavior and adult distribution. Journal of Experimental Marine Biology and Ecology, 117(1), 9-26. doi:10.1016/0022-0981(88)90068-8 J. Exp. Mar. Bioi. £Col., 1988, Vol. 117, pp. 9-26 9 Elsevier JEM 01042 Ascidian cannibalism correlates with larval behavior and adult distribution Craig M. Young Department ofLarval Ecology. Harbor Branch Oceanographic Institution, Fort Pierce, Florida. U.S.A. (Received 24 March 1987; revision received 9 December 1987; accepted 22 December 1987) Abstract: In the San Juan Islands, Washington, solitary ascidians .that occur in dense monospecific aggregations demonstrate gregarious settlement as larvae, whereas species that occur as isolated individuals do not. All gregarious species reject their own eggs and larvae as food, but nongregarious species consume conspecific eggs and larvae. Moreover, the rejection mechanism is species-specific in some cases. Correla tion analysis suggests that species specificity of the rejection response has a basis in siphon diameter, egg density, and larval size, but not in number of oral tentacles, or tentacle branching. One strongly cannibalistic species, Corella inflata Huntsman, avoids consuming its own eggs and newly released tadpoles by a unique brooding mechanism that involves floating eggs, negative geotaxis after hatching, and adult orientation. Key words: Ascidian; Cannibalism; Distribution; Larva; Settlement behavior INTRODUCTION Many sessile marine invertebrates, including filter-feeders such as mussels, oysters, barnacles and ascidians, occur in discrete, dense aggregations.
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The Biology of Seashores - Image Bank Guide All Images and Text ©2006 Biomedia ASSOCIATES
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Phylum Chordata Bateson, 1885
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Ascidiacea: Pyuridae), a Deep‐Water Ascidian from the Fjords and Sounds of British Columbia
FAU Institutional Repository http://purl.fcla.edu/fau/fauir This paper was submitted by the faculty of FAU’s Harbor Branch Oceanographic Institute. Notice: ©1995 John Wiley & Sons, Inc. This manuscript is an author version and may be cited as: Young, C. M., & Vazquez, E. (1995). Morphology, larval development and distribution of Bathypera feminalba n. sp. (Ascidiacea: Pyuridae), a deep‐water ascidian from the fjords and sounds of British Columbia. Invertebrate Biology, 114(1), 89‐106. Invertebrate Biology 114(1): 89-106. ? 1995 American Microscopical Society, Inc. Morphology, larval development, and distribution of Bathypera feminalba n. sp. (Ascidiacea: Pyuridae), a deep-water ascidian from the fjords and sounds of British Columbia Craig M. Young and Elsa Vazquez HarborBranch Oceanographic Institution, Ft. Pierce, Florida 34946, USA Abstract. A new species of the ascidian genus Bathypera (Ascidiacea: Pyuridae), B. feminalba, is described from deep-water habitats of Saanich Inlet and Barkley Sound, British Columbia, Canada, with data on the depth distribution, substratum use, reproduction, embryology, and larval development. The species is characterized by hourglass-shaped spicules topped with a single large spine and several smaller spines, a branchial sac with 7 folds per side, and irregular and curved stigmata. B. feminalba spawned in response to light following dark adaptation during the month of June. Development was similar to that of other pyurids. The tadpole larva, the first to be described in this genus, has the same sensory organs found in shallow-water relatives: an ocellus, a statocyst, and 3 large conical adhesive papillae. The ocellus is sensitive to monochromatic light between 475 and 600 nm with peak sensitivity in the blue region of the spectrum.
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Aquatic Invasions (2010) Volume 5, Issue 1: 31-39 This is an Open Access article; doi: 10.3391/ai.2010.5.1.5 © 2010 The Author(s). Journal compilation © 2010 REABIC Proceedings of the 16th International Conference on Aquatic Invasive Species (19-23 April 2009, Montreal, Canada) Research article Survey of harbours in Newfoundland for indigenous and non-indigenous ascidians and an analysis of their cytochrome c oxidase I gene sequences Ashley G. Callahan1*, Don Deibel1, Cynthia H. McKenzie2, Jennifer R. Hall1 and Matthew L. Rise1 1Ocean Sciences Centre, Memorial University, St. John's NL, A1C 5S7, Canada 2Fisheries & Oceans Canada, Northwest Atlantic Fisheries Centre, P.O. Box 5667, St. John's NL A1C 5X1, Canada E-mail: [email protected] (AGC), [email protected] (DD), [email protected] (CHM), [email protected] (JRH), [email protected] (MLR) *Corresponding author Received: 16 October 2009 / Accepted: 5 February 2010 / Published online: 18 February 2010 Abstract Invasive, non-indigenous ascidians have been a significant biofouling problem for the aquaculture industry in Nova Scotia and Prince Edward Island since the mid-1990’s. The problematic species in Atlantic Canada include Styela clava, Ciona intestinalis, Botryllus schlosseri and Botrylloides violaceus. Newfoundland harbour surveys that we have performed over the past three years revealed the presence of B. schlosseri and B. violaceus. As of yet, neither of these species has reached invasive abundance in Newfoundland. Portions of the COI genes of two non-indigenous ascidians (Botryllus schlosseri and Botrylloides violaceus) and two indigenous ascidians (Boltenia echinata and Halocynthia pyriformis) were cloned and sequenced.
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