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Geometric Morphometric Analysis Reveals That the Shells of Male and Female Siphon Whelks Penion Chathamensis Are the Same Size and Shape Felix Vaux A, James S
MOLLUSCAN RESEARCH, 2017 http://dx.doi.org/10.1080/13235818.2017.1279474 Geometric morphometric analysis reveals that the shells of male and female siphon whelks Penion chathamensis are the same size and shape Felix Vaux a, James S. Cramptonb,c, Bruce A. Marshalld, Steven A. Trewicka and Mary Morgan-Richardsa aEcology Group, Institute of Agriculture and Environment, Massey University, Palmerston North, New Zealand; bGNS Science, Lower Hutt, New Zealand; cSchool of Geography, Environment & Earth Sciences, Victoria University, Wellington, New Zealand; dMuseum of New Zealand Te Papa Tongarewa, Wellington, New Zealand ABSTRACT ARTICLE HISTORY Secondary sexual dimorphism can make the discrimination of intra and interspecific variation Received 11 July 2016 difficult, causing the identification of evolutionary lineages and classification of species to be Final version received challenging, particularly in palaeontology. Yet sexual dimorphism is an understudied research 14 December 2016 topic in dioecious marine snails. We use landmark-based geometric morphometric analysis to KEYWORDS investigate whether there is sexual dimorphism in the shell morphology of the siphon whelk Buccinulidae; conchology; Penion chathamensis. In contrast to studies of other snails, results strongly indicate that there fossil; geometric is no difference in the shape or size of shells between the sexes. A comparison of morphometrics; mating; P. chathamensis and a related species demonstrates that this result is unlikely to reflect a paleontology; reproduction; limitation of the method. The possibility that sexual dimorphism is not exhibited by at least secondary sexual some species of Penion is advantageous from a palaeontological perspective as there is a dimorphism; snail; true whelk rich fossil record for the genus across the Southern Hemisphere. -
Optics-Based Surveys of Large Unicellular Zooplankton: a Case Study on Radiolarians and Phaeodarians
Plankton Benthos Res 12(2): 95–103, 2017 Plankton & Benthos Research © The Plankton Society of Japan Optics-based surveys of large unicellular zooplankton: a case study on radiolarians and phaeodarians 1, 2 3 4,5 YASUHIDE NAKAMURA *, REI SOMIYA , NORITOSHI SUZUKI , MITSUKO HIDAKA-UMETSU , 6 4,5 ATSUSHI YAMAGUCHI & DHUGAL J. LINDSAY 1 Department of Botany, National Museum of Nature and Science, Tsukuba 305–0005, Japan 2 Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852–8521, Japan 3 Department of Earth Science, Graduate School of Science, Tohoku University, Sendai 980–8578, Japan 4 Research and Development (R&D) Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237–0061, Japan 5 School of Marine Biosciences, Kitasato University, Sagamihara 252–0373, Japan 6 Graduate School of Fisheries Sciences, Hokkaido University, Hakodate 041–8611, Japan Received 24 May 2016; Accepted 6 February 2017 Responsible Editor: Akihiro Tuji Abstract: Optics-based surveys for large unicellular zooplankton were carried out in five different oceanic areas. New identification criteria, in which “radiolarian-like plankton” are categorized into nine different groups, are proposed for future optics-based surveys. The autonomous visual plankton recorder (A-VPR) captured 65 images of radiolarians (three orders: Acantharia, Spumellaria and Collodaria) and 117 phaeodarians (four taxa: Aulacanthidae, Phaeosphaeri- da, Tuscaroridae and Coelodendridae). Colonies were observed for one radiolarian order (Collodaria) and three phae- odarian taxa (Phaeosphaerida, Tuscaroridae and Coelodendridae). The rest of the radiolarian orders (Taxopodia and Nassellaria) and the other phaeodarian taxa were not detected because of their small cell size (< ca. -
The Paleoecology and Fire History from Crater Lake
THE PALEOECOLOGY AND FIRE HISTORY FROM CRATER LAKE, COLORADO: THE LAST 1000 YEARS By Charles T. Mogen A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Environmental Science and Policy Northern Arizona University August 2018 Approved: R. Scott Anderson, Ph.D., Chair Nicholas P. McKay, Ph.D. Darrell S. Kaufman, Ph.D. Abstract High-resolution pollen, plant macrofossil, charcoal and pyrogenic Polycyclic Aromatic Hydrocarbon (PAH) records were developed from a 154 cm long sediment core collected from Crater Lake (37.39°N, 106.70°W; 3328 m asl), San Juan Mountains, Colorado. Several studies have explored Holocene paleo-vegetation and fire histories from mixed conifer and subalpine bogs and lakes in the San Juan and southern Rocky Mountains utilizing both palynological and charcoal studies, but most have been at relatively low resolution. In addition to presenting the highest resolution palynological study over the last 1000 years from the southern Rocky Mountains, this thesis also presents the first high-resolution pyrogenic PAH and charcoal paired analysis aimed at understanding both long-term fire history and the unresolved relationship between how each of these proxies depict paleofire events. Pollen assemblages, pollen ratios, and paleofire activity, indicated by charcoal and pyrogenic PAH records, were used to infer past climatic conditions. Although the ecosystem surrounding Crater Lake has remained a largely spruce (Picea) dominated forest, the proxies developed in this thesis suggest there were two distinct climate intervals between ~1035 to ~1350 CE and ~1350 to ~1850 CE in the southern Rocky Mountains, associated with the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) respectively. -
US Fish & Wildlife Service Seabird Conservation Plan—Pacific Region
U.S. Fish & Wildlife Service Seabird Conservation Plan Conservation Seabird Pacific Region U.S. Fish & Wildlife Service Seabird Conservation Plan—Pacific Region 120 0’0"E 140 0’0"E 160 0’0"E 180 0’0" 160 0’0"W 140 0’0"W 120 0’0"W 100 0’0"W RUSSIA CANADA 0’0"N 0’0"N 50 50 WA CHINA US Fish and Wildlife Service Pacific Region OR ID AN NV JAP CA H A 0’0"N I W 0’0"N 30 S A 30 N L I ort I Main Hawaiian Islands Commonwealth of the hwe A stern A (see inset below) Northern Mariana Islands Haw N aiian Isla D N nds S P a c i f i c Wake Atoll S ND ANA O c e a n LA RI IS Johnston Atoll MA Guam L I 0’0"N 0’0"N N 10 10 Kingman Reef E Palmyra Atoll I S 160 0’0"W 158 0’0"W 156 0’0"W L Howland Island Equator A M a i n H a w a i i a n I s l a n d s Baker Island Jarvis N P H O E N I X D IN D Island Kauai S 0’0"N ONE 0’0"N I S L A N D S 22 SI 22 A PAPUA NEW Niihau Oahu GUINEA Molokai Maui 0’0"S Lanai 0’0"S 10 AMERICAN P a c i f i c 10 Kahoolawe SAMOA O c e a n Hawaii 0’0"N 0’0"N 20 FIJI 20 AUSTRALIA 0 200 Miles 0 2,000 ES - OTS/FR Miles September 2003 160 0’0"W 158 0’0"W 156 0’0"W (800) 244-WILD http://www.fws.gov Information U.S. -
Forage Fish Management Plan
Oregon Forage Fish Management Plan November 19, 2016 Oregon Department of Fish and Wildlife Marine Resources Program 2040 SE Marine Science Drive Newport, OR 97365 (541) 867-4741 http://www.dfw.state.or.us/MRP/ Oregon Department of Fish & Wildlife 1 Table of Contents Executive Summary ....................................................................................................................................... 4 Introduction .................................................................................................................................................. 6 Purpose and Need ..................................................................................................................................... 6 Federal action to protect Forage Fish (2016)............................................................................................ 7 The Oregon Marine Fisheries Management Plan Framework .................................................................. 7 Relationship to Other State Policies ......................................................................................................... 7 Public Process Developing this Plan .......................................................................................................... 8 How this Document is Organized .............................................................................................................. 8 A. Resource Analysis .................................................................................................................................... -
Active Applicant Report Type Status Applicant Name
Active Applicant Report Type Status Applicant Name Gaming PENDING ABAH, TYRONE ABULENCIA, JOHN AGUDELO, ROBERT JR ALAMRI, HASSAN ALFONSO-ZEA, CRISTINA ALLEN, BRIAN ALTMAN, JONATHAN AMBROSE, DEZARAE AMOROSE, CHRISTINE ARROYO, BENJAMIN ASHLEY, BRANDY BAILEY, SHANAKAY BAINBRIDGE, TASHA BAKER, GAUDY BANH, JOHN BARBER, GAVIN BARRETO, JESSE BECKEY, TORI BEHANNA, AMANDA BELL, JILL 10/1/2021 7:00:09 AM Gaming PENDING BENEDICT, FREDRIC BERNSTEIN, KENNETH BIELAK, BETHANY BIRON, WILLIAM BOHANNON, JOSEPH BOLLEN, JUSTIN BORDEWICZ, TIMOTHY BRADDOCK, ALEX BRADLEY, BRANDON BRATETICH, JASON BRATTON, TERENCE BRAUNING, RICK BREEN, MICHELLE BRIGNONI, KARLI BROOKS, KRISTIAN BROWN, LANCE BROZEK, MICHAEL BRUNN, STEVEN BUCHANAN, DARRELL BUCKLEY, FRANCIS BUCKNER, DARLENE BURNHAM, CHAD BUTLER, MALKAI 10/1/2021 7:00:09 AM Gaming PENDING BYRD, AARON CABONILAS, ANGELINA CADE, ROBERT JR CAMPBELL, TAPAENGA CANO, LUIS CARABALLO, EMELISA CARDILLO, THOMAS CARLIN, LUKE CARRILLO OLIVA, GERBERTH CEDENO, ALBERTO CENTAURI, RANDALL CHAPMAN, ERIC CHARLES, PHILIP CHARLTON, MALIK CHOATE, JAMES CHURCH, CHRISTOPHER CLARKE, CLAUDIO CLOWNEY, RAMEAN COLLINS, ARMONI CONKLIN, BARRY CONKLIN, QIANG CONNELL, SHAUN COPELAND, DAVID 10/1/2021 7:00:09 AM Gaming PENDING COPSEY, RAYMOND CORREA, FAUSTINO JR COURSEY, MIAJA COX, ANTHONIE CROMWELL, GRETA CUAJUNO, GABRIEL CULLOM, JOANNA CUTHBERT, JENNIFER CYRIL, TWINKLE DALY, CADEJAH DASILVA, DENNIS DAUBERT, CANDACE DAVIES, JOEL JR DAVILA, KHADIJAH DAVIS, ROBERT DEES, I-QURAN DELPRETE, PAUL DENNIS, BRENDA DEPALMA, ANGELINA DERK, ERIC DEVER, BARBARA -
THE NAUTILUS [Vol
2 2 THE NAUTILUS [Vol. 69 (1) separated from each other by five centimeters. The snail was expanded with its head oriented away from the clam. When placed on the sand, the clam showed no activity during the next 30 minutes after which observations were discontinued. All but the lower (anterior) end of the body of the clam was covered by an envelope of slime secreted by the foot of the snail. It seems clear that P. duplicatus capturesEnsis directus by approaching it below the surface of the substratum and by ir ritating the lower portion so that it retreats upward. The snail then coats the razor clam with an envelope of slime which ap pears to have anesthetic properties. Successful capture proba bly depends on the ability of the snail to maintain contact with its prey until anesthesia takes place. ON THE OCCURRENCE OF THE NUDIBRANCH ALDERIA MODESTA (LOVÉN, 1844) ON THE CENTRAL CALIFORNIAN COAST By CADET HAND and JOAN STEINBERG Department of Zoology, University of California, Berkeley Alderia modesta (Loven, 1844) has long been known from the coasts of northern Europe. It has been recorded from as far north as the Trondheim Fjord in Norway (Norman, 1893), south to Skibbereen in Ireland (Allman, 1845) and on the French coast (Gollien, 1929). Therefore, it has been of con siderable interest to us to find well-established populations of an Alderia in two localities on the central Californian coast. Through the kindness of Monsieur G. Van Put of the Royal Institute of Natural Sciences of Belgium in Brussels and Dr. -
A Review of Planktivorous Fishes: Their Evolution, Feeding Behaviours, Selectivities, and Impacts
Hydrobiologia 146: 97-167 (1987) 97 0 Dr W. Junk Publishers, Dordrecht - Printed in the Netherlands A review of planktivorous fishes: Their evolution, feeding behaviours, selectivities, and impacts I Xavier Lazzaro ORSTOM (Institut Français de Recherche Scientifique pour le Développement eri Coopération), 213, rue Lu Fayette, 75480 Paris Cedex IO, France Present address: Laboratorio de Limrzologia, Centro de Recursos Hidricob e Ecologia Aplicada, Departamento de Hidraulica e Sarzeamento, Universidade de São Paulo, AV,DI: Carlos Botelho, 1465, São Carlos, Sï? 13560, Brazil t’ Mail address: CI? 337, São Carlos, SI? 13560, Brazil Keywords: planktivorous fish, feeding behaviours, feeding selectivities, electivity indices, fish-plankton interactions, predator-prey models Mots clés: poissons planctophages, comportements alimentaires, sélectivités alimentaires, indices d’électivité, interactions poissons-pltpcton, modèles prédateurs-proies I Résumé La vision classique des limnologistes fut de considérer les interactions cntre les composants des écosystè- mes lacustres comme un flux d’influence unidirectionnel des sels nutritifs vers le phytoplancton, le zoo- plancton, et finalement les poissons, par l’intermédiaire de processus de contrôle successivement physiqucs, chimiques, puis biologiques (StraSkraba, 1967). L‘effet exercé par les poissons plaiictophages sur les commu- nautés zoo- et phytoplanctoniques ne fut reconnu qu’à partir des travaux de HrbáEek et al. (1961), HrbAEek (1962), Brooks & Dodson (1965), et StraSkraba (1965). Ces auteurs montrèrent (1) que dans les étangs et lacs en présence de poissons planctophages prédateurs visuels. les conimuiiautés‘zooplanctoniques étaient com- posées d’espèces de plus petites tailles que celles présentes dans les milieux dépourvus de planctophages et, (2) que les communautés zooplanctoniques résultantes, composées d’espèces de petites tailles, influençaient les communautés phytoplanctoniques. -
Radiozoa (Acantharia, Phaeodaria and Radiolaria) and Heliozoa
MICC16 26/09/2005 12:21 PM Page 188 CHAPTER 16 Radiozoa (Acantharia, Phaeodaria and Radiolaria) and Heliozoa Cavalier-Smith (1987) created the phylum Radiozoa to Radiating outwards from the central capsule are the include the marine zooplankton Acantharia, Phaeodaria pseudopodia, either as thread-like filopodia or as and Radiolaria, united by the presence of a central axopodia, which have a central rod of fibres for rigid- capsule. Only the Radiolaria including the siliceous ity. The ectoplasm typically contains a zone of frothy, Polycystina (which includes the orders Spumellaria gelatinous bubbles, collectively termed the calymma and Nassellaria) and the mixed silica–organic matter and a swarm of yellow symbiotic algae called zooxan- Phaeodaria are preserved in the fossil record. The thellae. The calymma in some spumellarian Radiolaria Acantharia have a skeleton of strontium sulphate can be so extensive as to obscure the skeleton. (i.e. celestine SrSO4). The radiolarians range from the A mineralized skeleton is usually present within the Cambrian and have a virtually global, geographical cell and comprises, in the simplest forms, either radial distribution and a depth range from the photic zone or tangential elements, or both. The radial elements down to the abyssal plains. Radiolarians are most useful consist of loose spicules, external spines or internal for biostratigraphy of Mesozoic and Cenozoic deep sea bars. They may be hollow or solid and serve mainly to sediments and as palaeo-oceanographical indicators. support the axopodia. The tangential elements, where Heliozoa are free-floating protists with roughly present, generally form a porous lattice shell of very spherical shells and thread-like pseudopodia that variable morphology, such as spheres, spindles and extend radially over a delicate silica endoskeleton. -
Fagutredning, Prosjekt Nr
Müller - Sars Selskapet – Drøbak Daphnia lacustris (v.ø.), D. l. alpina (h.ø.): store, lavpredasjonsdaphnier og Lough Slieveaneena, Irland; oceanisk lavpredasjoninnsjø med bare ørret og store D. longispina Vedvarende menneskeindusert spredning av bredspektret ferskvannsfisk til og internt i Norge: et holarktisk, økologisk perspektiv Rapport nr. 10-2009 Drøbak 2009 ISBN: 978-82-8030-003-4 Ekstrakt Menneskeindusert spredning av fisk med bredspektret fødevalg, som karpefisk og gjedde, påvirker nå følsomme økosystemer i store deler av Norge. Mens en pest-art som ørekyte (Phoxinus phoxinus) kan leve over et meget bredt temperaturområde, og finnes like vanlig i høyfjellet som i karpefiskområder i lavlandet og på kontinentet, har andre karpefisk og nordlig gjedde (Esox lucius) vanligvis et trangere temperaturområde, slik som de siste spredningsartene i Norge: sørv (Scardinius erythrophthalmus), suter (Tinca tinca) og regnlaue (Leucaspius delineatus). Arter som karpe, mort, karuss, gullvederbuk og stingsild kan og også spres med menneskers hjelp. I tillegg ble mataukfisk som kanadisk bekkerøye spredd under perioden med forsuring i Norge og regnbueørret er satt ut ulike steder i landet gjennom flere tiår. Spredning av ørekyte og de tidligere utsettingene av faunafremmede laksefisk blir gitt stor oppmerksomhet i forvaltning og forskning, mens spredning av øvrige karpefisk og gjedde til ekstremt sjeldne økosystemer i norsk lavland får utvikle seg relativt fritt i det ”oppvirvlede støvet” rundt ørekyte og laksefiskene. På grunn av landets steile topografi og lange, sammenhengende fjellkjeder mot invasjonssentre, og -regioner, var det alltid problematisk for ferskvannsfisk å spre seg over hele Norge, før menneskene ankom. Etter siste istid har imidlertid menneskene båret fisk over det meste av landet. -
Marine Information Network Information on the Species and Habitats Around the Coasts and Sea of the British Isles
MarLIN Marine Information Network Information on the species and habitats around the coasts and sea of the British Isles Sponges, shade-tolerant red seaweeds and Dendrodoa grossularia on wave-surged overhanging lower eulittoral bedrock and caves MarLIN – Marine Life Information Network Marine Evidence–based Sensitivity Assessment (MarESA) Review John Readman 2020-01-24 A report from: The Marine Life Information Network, Marine Biological Association of the United Kingdom. Please note. This MarESA report is a dated version of the online review. Please refer to the website for the most up-to-date version [https://www.marlin.ac.uk/habitats/detail/1203]. All terms and the MarESA methodology are outlined on the website (https://www.marlin.ac.uk) This review can be cited as: Readman, J.A.J., 2020. Sponges, shade-tolerant red seaweeds and [Dendrodoa grossularia] on wave- surged overhanging lower eulittoral bedrock and caves. In Tyler-Walters H. and Hiscock K. (eds) Marine Life Information Network: Biology and Sensitivity Key Information Reviews, [on-line]. Plymouth: Marine Biological Association of the United Kingdom. DOI https://dx.doi.org/10.17031/marlinhab.1203.1 The information (TEXT ONLY) provided by the Marine Life Information Network (MarLIN) is licensed under a Creative Commons Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales License. Note that images and other media featured on this page are each governed by their own terms and conditions and they may or may not be available for reuse. Permissions beyond the scope of this -
Malacologist57corr.Pdf
Number 57 (August 2011) The Malacologist Page 1 NUMBER 57 AUGUST 2011 Annual Award Winner Alexandra Zieritz describes her work . Variability, function and phylogenetic significance of unionoid shell characters Freshwater mussels of the order Unionoida show a wide parasitic levels of both modern and ancient unionoid populations. variability in shell features (Fig. 1), but our understanding Continued on page 3 of which factors determine which trends in shell morphol- ogy is poor. The aim of my PhD thesis was to improve our knowledge on the phylogenetic significance and functional morphologies of unionoid shell characters; or in other words, to answer the question “Why does a mussel look the way it does?”. A good understanding of morphological differences between and within species is not only needed to resolve unanswered questions on unionoid evolution but can also be helpful for other fields of research, including palaeontology, ecology and conservation of these highly threatened animals. Intraspecific patterns in shell morphologies and their use for palaeontological reconstructions If we knew which environmental conditions or other fac- tors a given shell morphotype is associated with, we could reconstruct a mussel’s (former) habitat and/or biological characteristics by merely looking at its shell. Taxa produc- ing hard parts that persist in sedimentary deposits can addi- tionally be used to recover information about ancient popu- lations and environments. Unfortunately, our incomplete understanding of which factors cause which patterns in morphology has so far limited the use of unionoids in such reconstructions of both the present and the past. This is where I come in: Applying a novel morphometric tech- nique (Fourier shape analysis), I detected the first consis- tent habitat-associated trend in shell shape (Zieritz & Aldridge, 2009).