PISCO 'Mobile' Inverts 2017
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Star Asterias Rubens
bioRxiv preprint doi: https://doi.org/10.1101/2021.01.04.425292; this version posted January 4, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. How to build a sea star V9 The development and neuronal complexity of bipinnaria larvae of the sea star Asterias rubens Hugh F. Carter*, †, Jeffrey R. Thompson*, ‡, Maurice R. Elphick§, Paola Oliveri*, ‡, 1 The first two authors contributed equally to this work *Department of Genetics, Evolution and Environment, University College London, Darwin Building, Gower Street, London WC1E 6BT, United Kingdom †Department of Life Sciences, Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, United Kingdom ‡UCL Centre for Life’s Origins and Evolution (CLOE), University College London, Darwin Building, Gower Street, London WC1E 6BT, United Kingdom §School of Biological & Chemical Sciences, Queen Mary University of London, London, E1 4NS, United Kingdom 1Corresponding Author: [email protected], Office: (+44) 020-767 93719, Fax: (+44) 020 7679 7193 Keywords: indirect development, neuropeptides, muscle, echinoderms, neurogenesis 1 bioRxiv preprint doi: https://doi.org/10.1101/2021.01.04.425292; this version posted January 4, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. How to build a sea star V9 Abstract Free-swimming planktonic larvae are a key stage in the development of many marine phyla, and studies of these organisms have contributed to our understanding of major genetic and evolutionary processes. -
MARINE TANK GUIDE About the Marine Tank
HOME EDITION MARINE TANK GUIDE About the Marine Tank With almost 34,000 miles of coastline, Alaska’s intertidal zones, the shore areas exposed and covered by ocean tides, are home to a variety of plants and animals. The Anchorage Museum’s marine tank is home to Alaskan animals which live in the intertidal zone. The plants and animals in the Museum’s marine tank are collected under an Alaska Department of Fish and Game Aquatic Resource Permit during low tide at various beaches in Southcentral and Southeast Alaska. Visitors are asked not to touch the marine animals. Touching is stressful for the animals. A full- time animal care technician maintains the marine tank. Since the tank is not located next to the ocean, ocean water cannot be constantly pumped through it. This means special salt water is mixed at the Museum. The tank is also cleaned regularly. Equipment which keeps the water moving, clean, chilled to 43°F and constantly monitored. Contamination from human hands would impact the cleanliness of the water and potentially hurt the animals. A second tank is home to the Museum’s king crab, named King Louie, and black rockfish, named Sebastian. King crab and black rockfish of Alaska live in deeper waters than the intertidal zone creatures. This guide shares information about some of the Museum’s marine animals. When known, the Dena’ina word for an animal is included, recognizing the thousands of years of stewardship and knowledge of Indigeneous people of the Anchorage area and their language. The Dena’ina & Marine Species The geographically diverse Dena’ina lands span both inland and coastal areas, including Anchorage. -
Vortex Arrays and Ciliary Tangles Underlie the Feeding–Swimming Tradeoff in Starfish Larvae
Vortex arrays and ciliary tangles underlie the feeding{swimming tradeoff in starfish larvae William Gilpin1, Vivek N. Prakash2, Manu Prakash2∗ 1Department of Applied Physics, 2Department of Bioengineering, Stanford University, Stanford, CA ∗To whom correspondence should be addressed; E-mail: [email protected] March 12, 2018 arXiv:1611.01173v2 [physics.flu-dyn] 13 Feb 2017 1 Abstract Many marine invertebrates have larval stages covered in linear arrays of beating cilia, which propel the animal while simultaneously entraining planktonic prey.1 These bands are strongly conserved across taxa spanning four major superphyla,2,3 and they are responsible for the unusual morphologies of many invertebrate larvae.4,5 However, few studies have investigated their underlying hydrodynamics.6,7 Here, we study the ciliary bands of starfish larvae, and discover a beautiful pattern of slowly-evolving vor- tices that surrounds the swimming animals. Closer inspection of the bands reveals unusual ciliary \tangles" analogous to topological defects that break-up and re-form as the animal adjusts its swimming stroke. Quantitative experiments and modeling demonstrate that these vortices create a physical tradeoff between feeding and swim- ming in heterogenous environments, which manifests as distinct flow patterns or \eigen- strokes" representing each behavior|potentially implicating neuronal control of cilia. This quantitative interplay between larval form and hydrodynamic function may gen- eralize to other invertebrates with ciliary bands, and illustrates the potential -
Testing the Generality of the Trophic Cascade Paradigm for Sea Otters: a Case Study with Kelp Forests in Northern Washington, USA
Hydrobiologia (2007) 579:233–249 DOI 10.1007/s10750-006-0403-x PRIMARY RESEARCH PAPER Testing the generality of the trophic cascade paradigm for sea otters: a case study with kelp forests in northern Washington, USA Sarah K. Carter Æ Glenn R. VanBlaricom Æ Brian L. Allen Received: 6 April 2006 / Revised: 24 August 2006 / Accepted: 15 September 2006 / Published online: 31 January 2007 Ó Springer Science+Business Media B.V. 2007 Abstract Trophic cascade hypotheses for biolog- followed by a decline in diversity as one or a few ical communities, linking predation by upper tro- perennial algal species become dominant. Both sea phic levels to major features of ecological structure otter predation and commercial sea urchin harvest and dynamics at lower trophic levels, are widely are ecologically and economically important subscribed and may influence conservation policy. sources of urchin mortality in nearshore benthic Few such hypotheses have been evaluated for systems in northern Washington marine waters. We temporal or spatial generality. Previous studies of recorded changes in density of macroalgae in San sea otter (Enhydra lutris) predation along the outer Juan Channel, a marine reserve in the physically coast of North America suggest a pattern, often protected inland waters of northern Washington, elevated to the status of paradigm, in which sea otter resulting from three levels of experimental urchin presence leads to reduced sea urchin (Strongylo- harvest: (1) simulated sea otter predation (monthly centrotus spp.) biomass and rapid increases in complete harvest of sea urchins), (2) simulated abundance and diversity of annual algal species, commercial urchin harvest (annual size-selective harvest of sea urchins), and (3) no harvest (control). -
Marine Invertebrate Field Guide
Marine Invertebrate Field Guide Contents ANEMONES ....................................................................................................................................................................................... 2 AGGREGATING ANEMONE (ANTHOPLEURA ELEGANTISSIMA) ............................................................................................................................... 2 BROODING ANEMONE (EPIACTIS PROLIFERA) ................................................................................................................................................... 2 CHRISTMAS ANEMONE (URTICINA CRASSICORNIS) ............................................................................................................................................ 3 PLUMOSE ANEMONE (METRIDIUM SENILE) ..................................................................................................................................................... 3 BARNACLES ....................................................................................................................................................................................... 4 ACORN BARNACLE (BALANUS GLANDULA) ....................................................................................................................................................... 4 HAYSTACK BARNACLE (SEMIBALANUS CARIOSUS) .............................................................................................................................................. 4 CHITONS ........................................................................................................................................................................................... -
Diversity and Life-Cycle Analysis of Pacific Ocean Zooplankton by Video Microscopy and DNA Barcoding: Crustacea
Journal of Aquaculture & Marine Biology Research Article Open Access Diversity and life-cycle analysis of Pacific Ocean zooplankton by video microscopy and DNA barcoding: Crustacea Abstract Volume 10 Issue 3 - 2021 Determining the DNA sequencing of a small element in the mitochondrial DNA (DNA Peter Bryant,1 Timothy Arehart2 barcoding) makes it possible to easily identify individuals of different larval stages of 1Department of Developmental and Cell Biology, University of marine crustaceans without the need for laboratory rearing. It can also be used to construct California, USA taxonomic trees, although it is not yet clear to what extent this barcode-based taxonomy 2Crystal Cove Conservancy, Newport Coast, CA, USA reflects more traditional morphological or molecular taxonomy. Collections of zooplankton were made using conventional plankton nets in Newport Bay and the Pacific Ocean near Correspondence: Peter Bryant, Department of Newport Beach, California (Lat. 33.628342, Long. -117.927933) between May 2013 and Developmental and Cell Biology, University of California, USA, January 2020, and individual crustacean specimens were documented by video microscopy. Email Adult crustaceans were collected from solid substrates in the same areas. Specimens were preserved in ethanol and sent to the Canadian Centre for DNA Barcoding at the Received: June 03, 2021 | Published: July 26, 2021 University of Guelph, Ontario, Canada for sequencing of the COI DNA barcode. From 1042 specimens, 544 COI sequences were obtained falling into 199 Barcode Identification Numbers (BINs), of which 76 correspond to recognized species. For 15 species of decapods (Loxorhynchus grandis, Pelia tumida, Pugettia dalli, Metacarcinus anthonyi, Metacarcinus gracilis, Pachygrapsus crassipes, Pleuroncodes planipes, Lophopanopeus sp., Pinnixa franciscana, Pinnixa tubicola, Pagurus longicarpus, Petrolisthes cabrilloi, Portunus xantusii, Hemigrapsus oregonensis, Heptacarpus brevirostris), DNA barcoding allowed the matching of different life-cycle stages (zoea, megalops, adult). -
SCAMIT Newsletter Vol. 11 No. 12 1993 April
f^fO^'M Southern California Association of Marine Invertebrate Taxonomists 3720 Stephen White Drive San Pedro, California 90731 April, 1993 Vol. 11, Nb.12 NEXT MEETING: Master Species List GUEST SPEAKER: None DATE: May 10,1993 9:30 am - 3:00 pm LOCATION: Cabrillo Marine Museum San Pedro, CA MAY 10 MEETING The meeting will be devoted to working on the master species list. We will be resolving the final version of the list containing the four major dischargers and discussing the addition of the minor dischargers. FUNDS FOR THIS PUBLICATION PROVIDED IN PART BY THE ARCO FOUNDATION, CHEVRON USA, AND TEXACO INC. SCAM1T Newsletter is not deemed to be a valid publication for formal taxonomic purposes. MINUTES FROM MEETING ON APRIL 12 Larry Lovell is looking for suggestions for have SCAMIT members volunteer to assist possible speakers and subjects (especially ontripsasknowledgeableguides. Jodi is also non-polychaete taxa) for the next year. He laying plans for a Crustacean Biodiversity would appreciate any input you might have. workshop. He will contact international You can write him at: experts on as many families as possible to get Larry Lovell estimates onnumber of known and remaining 1036 Buena Vista species to be described. Vista, CA 92083 Jodi began by discussing Decapod higher taxonomy. Based on Spears et al. (1992) Larry announced again that for the 1994 Brachyura and Anomura are clearly Annual Meeting of the Southern California differentiated by sperm. Dromidia Academy of Sciences SCAMIT might be able (Dromiacea) and Litkodids (Alaskan King to have a taxonomic symposium. Also crab) have been confirmed as anomurans by discussed was the possibility of SCAMTT recent research. -
Tracking Larval, Newly Settled, and Juvenile Red Abalone (Haliotis Rufescens ) Recruitment in Northern California
Journal of Shellfish Research, Vol. 35, No. 3, 601–609, 2016. TRACKING LARVAL, NEWLY SETTLED, AND JUVENILE RED ABALONE (HALIOTIS RUFESCENS ) RECRUITMENT IN NORTHERN CALIFORNIA LAURA ROGERS-BENNETT,1,2* RICHARD F. DONDANVILLE,1 CYNTHIA A. CATTON,2 CHRISTINA I. JUHASZ,2 TOYOMITSU HORII3 AND MASAMI HAMAGUCHI4 1Bodega Marine Laboratory, University of California Davis, PO Box 247, Bodega Bay, CA 94923; 2California Department of Fish and Wildlife, Bodega Bay, CA 94923; 3Stock Enhancement and Aquaculture Division, Tohoku National Fisheries Research Institute, FRA 3-27-5 Shinhamacho, Shiogama, Miyagi, 985-000, Japan; 4National Research Institute of Fisheries and Environment of Inland Sea, Fisheries Agency of Japan 2-17-5 Maruishi, Hatsukaichi, Hiroshima 739-0452, Japan ABSTRACT Recruitment is a central question in both ecology and fisheries biology. Little is known however about early life history stages, such as the larval and newly settled stages of marine invertebrates. No one has captured wild larval or newly settled red abalone (Haliotis rufescens) in California even though this species supports a recreational fishery. A sampling program has been developed to capture larval (290 mm), newly settled (290–2,000 mm), and juvenile (2–20 mm) red abalone in northern California from 2007 to 2015. Plankton nets were used to capture larval abalone using depth integrated tows in nearshore rocky habitats. Newly settled abalone were collected on cobbles covered in crustose coralline algae. Larval and newly settled abalone were identified to species using shell morphology confirmed with genetic techniques using polymerase chain reaction restriction fragment length polymorphism with two restriction enzymes. Artificial reefs were constructed of cinder blocks and sampled each year for the presence of juvenile red abalone. -
Temporal Trends of Two Spider Crabs (Brachyura, Majoidea) in Nearshore Kelp Habitats in Alaska, U.S.A
TEMPORAL TRENDS OF TWO SPIDER CRABS (BRACHYURA, MAJOIDEA) IN NEARSHORE KELP HABITATS IN ALASKA, U.S.A. BY BENJAMIN DALY1,3) and BRENDA KONAR2,4) 1) University of Alaska Fairbanks, School of Fisheries and Ocean Sciences, 201 Railway Ave, Seward, Alaska 99664, U.S.A. 2) University of Alaska Fairbanks, School of Fisheries and Ocean Sciences, P.O. Box 757220, Fairbanks, Alaska 99775, U.S.A. ABSTRACT Pugettia gracilis and Oregonia gracilis are among the most abundant crab species in Alaskan kelp beds and were surveyed in two different kelp habitats in Kachemak Bay, Alaska, U.S.A., from June 2005 to September 2006, in order to better understand their temporal distribution. Habitats included kelp beds with understory species only and kelp beds with both understory and canopy species, which were surveyed monthly using SCUBA to quantify crab abundance and kelp density. Substrate complexity (rugosity and dominant substrate size) was assessed for each site at the beginning of the study. Pugettia gracilis abundance was highest in late summer and in habitats containing canopy kelp species, while O. gracilis had highest abundance in understory habitats in late summer. Large- scale migrations are likely not the cause of seasonal variation in abundances. Microhabitat resource utilization may account for any differences in temporal variation between P. gracilis and O. gracilis. Pugettia gracilis may rely more heavily on structural complexity from algal cover for refuge with abundances correlating with seasonal changes in kelp structure. Oregonia gracilis mayrelyonkelp more for decoration and less for protection provided by complex structure. Kelp associated crab species have seasonal variation in habitat use that may be correlated with kelp density. -
Kelp Ecosystem Connections
Consequences of trophic, foundational and engineering services provided by kelp KELP ECOSYSTEM communities CONNECTIONS Maxwell D. Calloway The Evergreen State College Northwest Straits Commission Puget Sound Restoration Fund PREFACE: • Nursery habitat • Trophic subsidies from detrital export • “Stock” open water fisheries • Increased biodiversity • Demonstrate the importance of kelp ecosystems for mid and high trophic level and commercially OBJECTIVE important fin-fish species. CONTRIBUTIONS TO NEARSHORE FOOD WEBS DIRECT GRAZING • Not the most common. • Urchins are most famous example. • Puget Sound: • Kelp Crab (Pugettia Producta) • Littorinid snails (Lacuna vincta) • Amphipods • Abundances of mesograzers may have greater impacts than more conspicuous grazers. • Ratio of biomass to grazing rate. • Photo Courtesy: Helen Berry, DNR; Wikimedia Commons DETRITAL PATHWAYS Distal ends of blades Erosion = 17% - 100% of Plant itself is Support for erode POC and annual NPP (Krause-Jensen & leaching DOC biofilms and DOC Duarte, 2016, Nature Geosciences) into the water, microbes DISLODGMENT • Lower as proportion of NPP than erosion. • Export of kelp to pelagic, beach, continental shelves and deep ocean trenches. • Quickly colonized by marine and terrestrial invertebrates. • 43% of annual NPP exported (Krause- Jensen & Duarte, 2016, Nature Geosciences) Photo Courtesy: Linnaea Mallette, www.publicdomainpictures.net STABLE ISOTOPE ANALYSIS • ∂13C and ∂15N enrichment • ∂15N – trophic position • ∂13C – source of production Figure Courtesy: Müldner, -
Appendix 3 Marine Spcies Lists
Appendix 3 Marine Species Lists with Abundance and Habitat Notes for Provincial Helliwell Park Marine Species at “Wall” at Flora Islet and Reef Marine Species at Norris Rocks Marine Species at Toby Islet Reef Marine Species at Maude Reef, Lambert Channel Habitats and Notes of Marine Species of Helliwell Provincial Park Helliwell Provincial Park Ecosystem Based Plan – March 2001 Marine Species at wall at Flora Islet and Reef Common Name Latin Name Abundance Notes Sponges Cloud sponge Aphrocallistes vastus Abundant, only local site occurance Numerous, only local site where Chimney sponge, Boot sponge Rhabdocalyptus dawsoni numerous Numerous, only local site where Chimney sponge, Boot sponge Staurocalyptus dowlingi numerous Scallop sponges Myxilla, Mycale Orange ball sponge Tethya californiana Fairly numerous Aggregated vase sponge Polymastia pacifica One sighting Hydroids Sea Fir Abietinaria sp. Corals Orange sea pen Ptilosarcus gurneyi Numerous Orange cup coral Balanophyllia elegans Abundant Zoanthids Epizoanthus scotinus Numerous Anemones Short plumose anemone Metridium senile Fairly numerous Giant plumose anemone Metridium gigantium Fairly numerous Aggregate green anemone Anthopleura elegantissima Abundant Tube-dwelling anemone Pachycerianthus fimbriatus Abundant Fairly numerous, only local site other Crimson anemone Cribrinopsis fernaldi than Toby Islet Swimming anemone Stomphia sp. Fairly numerous Jellyfish Water jellyfish Aequoria victoria Moon jellyfish Aurelia aurita Lion's mane jellyfish Cyanea capillata Particuilarly abundant -
The Keystone Species Concept: a Critical Appraisal H
opinion and perspectives ISSN 1948‐6596 perspective The keystone species concept: a critical appraisal H. Eden W. Cottee‐Jones* and Robert J. Whittaker† Conservation Biogeography and Macroecology Programme, School of Geography and the Environment, Oxford University Centre for the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, UK *henry.cottee‐[email protected]; http://www.geog.ox.ac.uk/graduate/research/ecottee‐jones.html †[email protected] Abstract. The keystone concept has been widely applied in the ecological literature since the idea was introduced in 1969. While it has been useful in framing biodiversity research and garnering support in conservation policy circles, the terminology surrounding the concept has been expanded to the extent that there is considerable confusion over what exactly a keystone species is. Several authors have ar‐ gued that the term is too broadly applied, while others have pointed out the technical and theoretical limitations of the concept. Here, we chart the history of the keystone concept’s evolution and summa‐ rise the plethora of different terms and definitions currently in use. In reviewing these terms, we also analyse the value of the keystone concept and highlight some promising areas of recent work. Keywords. community composition, ecosystem engineer, definitions, dominant species, keystone con‐ cept, keystone species Introduction: the origins of the concept cies” (p. 93). Paine’s field experiments have be‐ The keystone concept has its roots in food‐web come a classic ecological case study, with his dia‐ ecology, and was coined by Paine (1969). In his grams reproduced in many standard ecology texts, experimental manipulation of rocky shoreline his 1966 paper cited 2,509 times, and his note communities on the Pacific coast in Washington, coining the term ‘keystone species’ 465 times (ISI th Paine found that the removal of the carnivorous Web of Knowledge 13 September 2012).