Histophagous Ciliate Pseudocollinia Brintoni and Bacterial Assemblage Interaction with Krill Nyctiphanes Simplex. I. Transmission Process
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Nocturnal Feeding of Pacific Hake and Jack Mackerel Off the Mouth of the Columbia River, 1998-2004: Implications for Juvenile Salmon Predation Robert L
This article was downloaded by: [Oregon State University] On: 16 August 2011, At: 13:01 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Transactions of the American Fisheries Society Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/utaf20 Nocturnal Feeding of Pacific Hake and Jack Mackerel off the Mouth of the Columbia River, 1998-2004: Implications for Juvenile Salmon Predation Robert L. Emmett a & Gregory K. Krutzikowsky b a Northwest Fisheries Science Center, NOAA Fisheries, 2030 South Marine Science Drive, Newport, Oregon, 97365, USA b Cooperative Institute of Marine Resource Studies, Oregon State University, 2030 South Marine Science Drive, Newport, Oregon, 97365, USA Available online: 09 Jan 2011 To cite this article: Robert L. Emmett & Gregory K. Krutzikowsky (2008): Nocturnal Feeding of Pacific Hake and Jack Mackerel off the Mouth of the Columbia River, 1998-2004: Implications for Juvenile Salmon Predation, Transactions of the American Fisheries Society, 137:3, 657-676 To link to this article: http://dx.doi.org/10.1577/T06-058.1 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.tandfonline.com/page/terms-and- conditions This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan, sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. -
Balaenoptera Bonaerensis – Antarctic Minke Whale
Balaenoptera bonaerensis – Antarctic Minke Whale compared to B. bonaerensis. This smaller form, termed the “Dwarf” Minke Whale, may be genetically different from B. bonaerensis, and more closely related to the North Pacific Minke Whales, and thus has been classified B. acutorostrata (Wada et al. 1991; IWC 2001). This taxonomic position, although somewhat controversial, has been accepted by the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), and the Convention on Migratory Species (CMS). Assessment Rationale The current IWC global estimate of abundance of Antarctic Dr. Meike Scheidat Minke Whales is about 500,000 individuals. The abundance estimates declined from about 700,000 for the second circumpolar set of abundance survey cruises Regional Red List status (2016) Least Concern* (1985/86 to 1990/91) to about 500,000 for the third National Red List status (2004) Least Concern (1991/92 to 2003/04). Although this decline was not statistically significant, the IWC Scientific Committee does Reasons for change No change consider these results to reflect a change. However, Global Red List status (2008) Data Deficient whether this change is genuine or attributed to greater proportions of pack ice limiting the survey extent, has not TOPS listing (NEMBA) (2007) None yet been determined. More detailed results from an CITES listing (1986) Appendix I assessment model are available for the mid-Indian to the mid-Pacific region, and suggest that the population Endemic No increased to a peak in 1970 and then declined, with it *Watch-list Data being unclear whether this decline has levelled off or is still continuing past 2000. -
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). -
Thysanoessa Inermis and T. Longicaudata
MARINE ECOLOGY PROGRESS SERIES Vol. 144: 175-183,1996 Published December 5 Mar Ecol Prog Ser Abundance, maturity and growth of the krill species Thysanoessa inermis and T. longicaudata in the Barents Sea Padmini Dalpadado*, Hein Rune Skjoldal Institute of Marine Research, PO Box 1870 Nordnes, N-5024 Bergen, Norway ABSTRACT. Thysanoessa inermis and 7. longicaudata were the dominant krill species observed in the western and central Barents Sea between 1984 and 1992. Both species are typically boreal and sub- arctic, and were found in very low abundances in the Arctic water masses in the northern Barents Sea. High abundances (up to 100 to 200 ind. m-2) of 7. inermis and T. longicaudata were found in the slope and adjoining deep waters south and south east of the Svalbard Bank. The main spawning times of T inermis and T longicaudata occurred in May-June and coincided with the spring phytoplankton bloom. 7. inermis has a life span of 3 to 4 yr, while 7. longicaudata can live up to 2 yr. Growth took place from late winter to aut'umn; a marked negative growth occurred during the late autumn and winter periods. The seasonally oscillating von Bertalanffy growth function gave a reasonably good fit to the growth curves. Coinciding with a strong reduction In the older capelin stock between 1984 and 1987, there was a subsequent increase in the abundance and biomass of T. inermis and 7 longicaudata. A decrease in krill abundance and biomass was observed to correspond with the rapid recovery and growth of capelin stock up to 1991. -
The Influence of Seasonal and Decadal Trends in Coastal Ocean Processes on the Population Biology of the Krill Species Euphausia
The Influence of Seasonal and Decadal Trends in Coastal Ocean Processes on the Population Biology of the krill species Euphausia pacifica: Results of a coupled ecosystem and individual based modeling study By Jeffrey G. Dorman A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Integrative Biology in the Graduate Division of the University of California, Berkeley Committee in charge: Professor Thomas M. Powell, Chair Professor Mary E. Power Professor Mark Stacey Fall 2011 The Influence of Seasonal and Decadal Trends in Coastal Ocean Processes on the Population Biology of the krill species Euphausia pacifica: Results of a coupled ecosystem and individual based modeling study Copyright 2011 by Jeffrey G. Dorman Abstract The Influence of Seasonal and Decadal Trends in Coastal Ocean Processes on the Population Biology of the krill species Euphausia pacifica: Results of a coupled ecosystem and individual based modeling study by Jeffrey G. Dorman Doctor of Philosophy in Integrative Biology University of California, Berkeley Professor Thomas M. Powell, Chair Krill of the California Current play a crucial role in the transfer of primary production up to many commercially important higher trophic levels. Understanding the short time scale (weeks to seasonal) and long time scale (decadal) variability in abundance, condition, and spatial patterns that results from changes in ocean conditions is critical if we hope to manage the fishery of any higher trophic levels from more than a single species approach. I have coupled a suite of models in an attempt to understand the impacts of changing ocean conditions on this important prey item. -
The Functional Biology of Krill (Thysanoessa Raschii)
with raschii) fjord The functional biology of krill (Thysanoessa raschii) Greenlandic (Thysanoessa a ‐ with focus on its ecological role in krill of role in a Greenlandic fjord biology Mette Dalgaard Agersted ecological its Supervisor: Torkel Gissel Nielsen on [email protected] functional focus The DTU Aqua, National Institute of Aquatic Resources, Technical University of Denmark, Kavalergaarden 6, 2920, Charlottenlund, Denmark. The functional biology of krill (Thysanoessa raschii) with focus on its ecological role in a Greenlandic fjord Outline • • • • • Background Summary Results Materials Aim and –who methods , what, where? Where? 3 NASA The functional biology of krill (Thysanoessa raschii) with focus on its ecological role in a Greenlandic fjord Krill • • • Diel Pelagic Large http://upload.wikimedia.org/wikipedi ‐ vertical Euphausiids schools living a/commons/b/bb/Krillanatomykils.jpg migration ‐ patchy Photo: Russ Hopcroft 4 with Krill in Western Greenland raschii) fjord • 4 species – Thysanoessa raschii Greenlandic (Thysanoessa – T. inermis a in – T. longicaudata krill of role – Meganyctiphanes norvegica biology ecological its on functional focus The wikipedia.org Thysanoessa Meganyctiphanes raschii norvegica Pedersen & Smidt 2000 Thysanoessa Thysanoessa inermis longicaudata 5 Photos: Russ Hopcroft The food web • Arctic krill not so well studied compared to Antarktic krill Phytoplankton • Key role Microplankton Copepods • Knowledge is crucial in understandingDetritus ecosystem dynamics Faecal pellets can sink hundreds of meters a -
Molecular Phylogenetic Analysis of Euphausia Pacifica, Thysanoessa Longipes and T. Inermis (Crustacea : Euphausiacea) in The
Molecular Phylogenetic Analysis of Euphausia pacifica, Thysanoessa longipes and T. inermis (Crustacea : Title Euphausiacea) in the Subarctic Pacific Region, with Notes on Non-Geographical Genetic Variations for E. pacifica Author(s) Takahashi, Tomokazu; Taniguchi, Marina; Sawabe, Tomoo; Christen, Richard; Ikeda, Tsutomu Citation 北海道大学水産科学研究彙報, 57(1-2), 1-8 Issue Date 2006-11 Doc URL http://hdl.handle.net/2115/32480 Type bulletin (article) File Information P3-8.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP Bull.Fish.Sci.Hokkaido Univ. 57(1/2),1-8,2006. Molecular Phylogenetic Analysis of Euphausia pacifica,Thysanoessa longipes and T.inermis(Crustacea:Euphausiacea) in the Subarctic Pacific Region,with Notes on Non-Geographical Genetic Variations for E.pacifica Tomokazu TAKAHASHI,Marina TANIGUCHI,Tomoo SAW ABE,Richard CHRISTEN and Tsutomu IKEDA (Received 24 November 2005,Accepted 6 January 2006) Abstract Nucleotide sequences of a 1,854 base pair region of the nuclear small subunit(18S)rDNA gene and of a 475 or 476 base pair region of the mitochondrial large subunit(mt16S)rRNA gene were determined for Euphausia pacifica collected from the western/eastern subarctic Pacific,Okhotsk Sea and Japan Sea,and Thysanoessa inermis from the Okhotsk Sea T.inermis from the Okhotsk Sea and Bering Sea.Interspecific differences were 0.16-0.86% for 18S rDNA gene and 2.3-9.3%for 16S rRNA gene.Intraspefic differences are of special interest of E.pacifica from geographically distant sites,but were very small(0.0-<0.1%for -
Euphausiids Thysanoessa Raschi (M
Growth, development and distribution of the euphausiids Thysanoessa raschi (M. Sars) and Thysanoessa inermis (Kroyer) in the southeastern Bering Sea SHARON L. SMITH Smith, S. L. 1991: Growth, development and distribution of the euphausiids Thysanoessa raschi (M. Sars) and Thysanoessa inermis (Krbyer) in the southeastern Bering Sea. Pp. 461-478 in Sakshaug, E., Hopkins, C. C. E. & 0ritsland, N. A. (eds.): Proceedings of the Pro Mare Symposium on Polar Marine Ecology, Trondheim, 12-16 May 1990. Polar Research lO(2). The distribution and abundance of the euphausiids Thysanoessa raschi and Thysanoessa inermb in the shelf waters of the southeastern Bering Sea were investigated during spring and summer of 1980 and 1981. Experiments were conducted during the study to describe the reproduction, growth and development of these species. T. inermb was the dominant euphausiid species observed over the outer shelf region; it began spawning in early April while T. raschi dominated the euphausiids over the middle shelf and began spawning in mid or late May. The seasonal progression in spawning followed the seasonal development of temperature; however, spawning did not begin earlier in 1981 which was a warmer year than 1980. Average egg production of T. raschi ranged from 3.4% to 3.8% dry body weight of the female per day during the first three days after capture. Secondary production estimates for T. raschi females ranged from 4.2% to 5.2% dry body weight per day in 1980 and 5.9% to 6.0% dry body weight per day in 1981. A sharp decline in the abundance of adolescent and adult euphausiids over the middle shelf during the spring bloom period when food appeared to be abundant suggests that predation by diving birds, pollack, Tanner crabs, whales and seals effectively controls the euphausiid population. -
EUPHAUSIIDS in the GULF of CALIFORNIA-THE 1957 CRUISES Calcofi Rep., Vol
BRINTON AND TOWNSEND: EUPHAUSIIDS IN THE GULF OF CALIFORNIA-THE 1957 CRUISES CalCOFI Rep., Vol. XXI, 1980 EUPHAUSIIDS IN THE GULF OF CALIFORNIA-THE 1957 CRUISES E. BRINTON AND A.W. TOWNSEND Marine Life Research Group Scripps institution of Oceanography La Jolla. CA 92093 ABSTRACT las especies y de sus etapas de vida, en particular las de Euphasiid crustaceans in the Gulf of California were las larvas mas juveniles, se describen en relacion con las examined from four bimonthly CalCOFI grid cruises variaciones estacionales en el flujo y las temperaturas de during February through August of 1957. Of the nine las aguas del Golfo. species found to regularly inhabit the Gulf, Nematoscelis dificilis and Nyctiphanes simplex are common to the INTRODUCTION warm-temperate California Current. These have the The Gulf of California is inhabited by dense stocks of broadest ranges in the Gulf, peaking in abundance and plankton (Osario-Tafall 1946; Zeitzschel 1969). This reproducing maximally during February-April and Feb- appendix of the North Pacific Ocean communicates. ruary-June respectively, before intense August heating with the 'eastern boundary circulation at the northern limit takes place in the Gulf. Euphausia eximia, a species of the eastern tropical Pacific, which is characterized by having high densities at zones considered marginal to the its distinctive oxygen-deficient layer. The 1 000-km axis eastern tropical Pacific, also varies little in range during of the Gulf extends from the mouth at the tropic, 23"27'N, the year, consistently occupying the southern half of the to latitude 32"N, which is within the belt of the warm- Gulf. -
2014 Final Report
Completion Report Period: 2/1/2014 - 1/31/2015 Project: R/OCEH-10 - Effects of ocean acidification on trophically-important crustacean zooplankton of Washington State STUDENTS SUPPORTED Barber, Tiffany, [email protected], California State University Monterey Bay, no department, status: new, no field of study, no advisor, degree type: BS, degree date: 2016-06-01, degree completed this period: No Student Project Title: Effects of Ocean Acidification on the early life stages of the krill, Euphausia pacifica Involvement with Sea Grant This Period: Intern Post-Graduation Plans: none McLaskey, Anna, [email protected], University of Washington, Oceanography, status: cont, field of study: Biological Oceanography, advisor: J. Keister, degree type: PhD, degree date: 2019-06-01, degree completed this period: No Student Project Title: Effects of ocean acidification on crustacean zooplankton. Involvement with Sea Grant This Period: Ph.D. student supported through by WSG through this grant. Anna is the lead student on this project. Post-Graduation Plans: none Raatikainen, Lisa, [email protected], University of Washington, Oceanography, status: cont, field of study: Biological Oceanography, advisor: J. Keister, degree type: PhD, degree date: 2019-06-01, degree completed this period: No Student Project Title: none Involvement with Sea Grant This Period: Assisted in field and lab. Post-Graduation Plans: none CONFERENCES / PRESENTATIONS Keister JE, McLaskey AK (2014) Testing the effects of ocean acidification on copepod and krill populations. Poster presentation at the Gordon Conference on Climate Change, Waterville Valley, NH, July 8-10., public/profession presentation, 150 attendees, 2014-07-09 Keister JE, McLaskey AK, McElhany P, Olson B (2014) Testing the effects of ocean acidification on copepod and krill populations. -
Euphausiacea (Crustacea) of the North Pacific
UC San Diego Bulletin of the Scripps Institution of Oceanography Title Euphausiacea (Crustacea) of the North Pacific Permalink https://escholarship.org/uc/item/62h3k734 Authors Boden, Brian P Johnson, Martin W Brinton, Edward Publication Date 1955-11-15 Peer reviewed eScholarship.org Powered by the California Digital Library University of California THE EUPHAUSIACEA (CRUSTACEA) OF THE NORTH PACIFIC BY BRIAN P. BODEN, MARTIN W. JOHNSON, AND EDWARD BRINTON UNIVERSITY OF CALIFORNIA PRESS BERKELEY AND LOS ANGELES 1955 BULLETIN OF THE SCRIPPS INSTITUTION OF OCEANOGRAPHY OF THE UNIVERSITY OF CALIFORNIA LA JOLLA, CALIFORNIA EDITORS: CLAUDE E. ZOBELL, ROBERT S. ARTHUR, DENIS L. FOX Volume 6, No. 8, pp. 287–400, 55 figures in text Submitted by editors November 5,1954 Issued November 15, 1955 Price, $1.50 UNIVERSITY OF CALIFORNIA PRESS BERKELEY AND LOS ANGELES CALIFORNIA CAMBRIDGE UNIVERSITY PRESS LONDON, ENGLAND [CONTRIBUTION FROM THE SCRIPPS INSTITUTION OF OCEANOGRAPHY, NO. 796] PRINTED IN THE UNITED STATES OF AMERICA CONTENTS THE EUPHAUSIACEA (CRUSTACEA) OF THE NORTH PACIFIC BY BRIAN P. BODEN, MARTIN W. JOHNSON, AND EDWARD BRINTON INTRODUCTION AS A PART of the Marine Life Research Program of the Scripps Institution of Oceanography (a member of the California Coöperative Oceanic Fisheries Investigations) an increased effort is being made to describe and evaluate the various organic factors that are important in the biological economy of the sea. In attacking the problem, the most expedient procedure is to study in detail the various components of the plankton, for it is well known that these components in varying degrees of importance provide directly the basic food for the Fig. -
SC/F14/J15 Prey Composition and Consumption Rate by Antarctic Minke Whales Based on JARPA and JARPAII Data
SC/F14/J15 Prey composition and consumption rate by Antarctic minke whales based on JARPA and JARPAII data TSUTOMU TAMURA AND KENJI KONISHI The Institute of Cetacean Research, 4-5 Toyomi-cho, Chuo-ku, Tokyo, 104-0055, Japan Contact e-mail: [email protected] ABSTRACT In this study, the information on the feeding habits of Antarctic minke whales (Balaenoptera bonaerensis) sampled during the surveys of the Japanese Whale Research under Special Permit in the Antarctic (JARPA and JARPAII), for the period of 1987/88–2010/11 are summarized. Some of the analyses considered recommendations offered during the 2006 JARPA final review meeting (e.g. those related to the duration of the feeding period, digestion rate and examination at smaller spatial scales). We compared the feeding habits of the Antarctic minke whales during the JARPA period (1987/88–2004/05) and the JARPAII period (2005/06–2010/11). The Antarctic minke whales fed mostly on Antarctic krill (Euphausia superba) in offshore areas, and on ice krill E. crystallorophias in coastal (shallow) areas on the continental shelf of the Ross Sea and Prydz Bay. The whales fed mainly before 5AM suggesting that feeding activity decreases early in the day. The daily prey consumption was estimated using two independent methods, which were from theoretical energy requirement calculations and from diurnal changes of stomach contents’ mass. The daily prey consumptions of Antarctic minke whales per capita during the feeding season based on these two methods were 95.1–127.0 and 182.6–250.3kg for immature and mature males, 125.8– 138.7 and 268.1–325.5kg for immature and mature females, respectively.