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Amphipoda: Chapter 39 of The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon. Fourth Edition, Completely Revised and Expanded

Creator:: Chapman, John W.
Abstract:: The Amphipoda have been divided into the suborders Gammaridea, Caprellidea, Cyamidea, Hyperiidea and Ingolfiellidea (Schram 1986, Crustacea. Oxford University Press, New York). However, Myers and Lowry (2003) regard the caprellids, or skeleton shrimps, and the cyamids, or whale lice, as families Caprellidae and Cyamidae. These distinctive groups are covered in...
Resource Type:: Part of Book
Full Text:: . Res. 40: 205–222. Lee, W. L., and M. A. Miller. 1980. Isopoda and Tanaidacea: the isopods and allies

Is there a common response to ultraviolet-B radiation by marine phytoplankton?

Creator:: Behrenfeld, Michael J., Chapman, John W., Hardy, John T., and Lee II, Henry
Abstract:: Global increases in ultraviolet-B radiation (UVBR) have the potential to alter marine primary production and to affect carbon cycles and marine trophic dynamics. Estimates of UVBR induced photoinhibition have varied greatly, indicating that a common dose-response by marine phytoplankton may not occur from place to place. An action spectrum describing...
Resource Type:: Article
Full Text:: cutoff characteristics of ~ ~ l a r @ resulted in spectral divergence between treatments for

An introduced Asian parasite threatens northeastern Pacific estuarine ecosystems

Creator:: Chapman, John W., Dumbauld, Brett R., Itani, Gyo, and Markham, John C.
Abstract:: The introduced Asian parasitic bopyrid isopod, Orthione griffenis, was first discovered on the Pacific coast of North America in Washington in 1988 and next in California in 1992. The range of Orthione presently extends from British Columbia to Baja California, where it infests at least two species of the native...
Resource Type:: Article
Full Text:: threatens northeastern Pacific estuarine ecosystems John W. Chapman • Brett R. Dumbauld • Gyo Itani • John

A doubled down invasion of the northeast Pacific by the Asian mud shrimp, Upogebia major and its coevolved bopyrid isopod parasite, Orthione griffenis

Creator:: Chapman, John W., Li, Jingchun, McGowan, Michael F., Breitenstein, Ralph A., Appy, Ralph, Hieb, Kathryn A., Piotrowski, Christina N., and Elder, Leanne E.
Abstract:: Dramatic declines of the native northeast Pacific mud shrimp, Upogebia pugettensis over the last three decades have occurred in response to intense infestations by the Asian bopyrid isopod parasite, Orthione griffenis, that was introduced in the 1980s. We report herein the arrival of the Asian mud shrimp, Upogebia major, in...
Resource Type:: Article
Full Text:: parasite, Orthione griffenis Aquatic Invasions (2021) Volume 16, Issue 4: 721–749 Chapman et al

EPA’s Benthic Habitat Data for Yaquina Estuary

Creator:: DeWitt, Ted
Abstract:: Scientists at EPA’s National Health and Environmental Effects Research Laboratory, Western Ecology Division (WED) have been studying seafloor (benthic) habitats in Yaquina estuary for several years. Those studies were conducted as parts of several research projects, including: effects of contaminated sediments on benthic invertebrates, effects of nutrient enrichment on estuarine...
Resource Type:: Presentation
Full Text:: Nelson, David Specht, David Young, Rick Swartz (retired), John Chapman (OSU), Tony D’Andrea (OSU

Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Creator:: Suchman, Cynthia L., Brodeur, Richard D., Daly, Elizabeth A., and Emmett, Robert L.
Abstract:: Blooms of jellyfish around the world have been correlated with climatic variables related to environmental causes. Sizeable populations of large medusae, primarily Chrysaora fuscescens and Aequorea sp., appear annually in shelf waters of the Northeast Pacific Ocean. Previous research has shown that C. fuscescens is abundant seasonally in the inner...
Resource Type:: Article
Full Text:: the Northern California Current: variability in relation to environmental conditions Cynthia L

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Creator:: Sogard, Susan M. and Olla, Bori L.
Abstract:: The effects of reduced food availability on the behavior of juvenile walleye pollock Theragra chalcogramma were examined in laboratory experiments designed to test for potential energy-conserving responses. Groups of juvenile fish were held on 1 of 6 ration treatments ranging from ad libitum to near starvation, and then vertical distribution...
Resource Type:: Article
Full Text:: marine fish in a thermal gradient: potential energy-conserving mechanisms Susan M. Sogard*, Bori L

Effect of light on juvenile walleye pollock shoaling and their interaction with predators

Creator:: Ryer, Clifford H. and Olla, Bori L.
Abstract:: Research was undertaken to examine the influence of light intensity on the shoaling behavior, activity and anti-predator behavior of juvenile walleye pollock Theragra chalcogramma. Under a 12 h light/12 h dark photoperiod, juveniles displayed a diurnal shoaling and activity pattern, characterized by fish swimming in cohesive groups during the day,...
Resource Type:: Article
Full Text:: Ecol Prog Ser l Published June 18 Effect of light on juvenile walleye pollock shoaling and their

Nocturnal feeding of Pacific hake and jack mackerel off the mouth of the Columbia River, 1998-2004: implications for juvenile salmon predation

Creator:: Emmett, Robert L. and Krutzikowsky, Gregory K.
Abstract:: Predation by piscivorous marine fishes has been hypothesized to be a primary source of marine mortality for Pacific Northwest juvenile salmon. During the springs and summers of 1998–2004, we collected predator and prey fishes (forage and juvenile salmonids) at the surface at night off the mouth of the Columbia River....
Resource Type:: Article
Full Text:: -2004: Implications for Juvenile Salmon Predation Robert L. Emmett a & Gregory K. Krutzikowsky b a

Salinity adaptation of the invasive New Zealand mud snail (Potamopyrgus antipodarum) in the Columbia River estuary (Pacific Northwest, USA): physiological and molecular studies

Creator:: Hoy, Marshal, Boese, Bruce L., Taylor, Louise, Reusser, Deborah, and Rodriguez, Rusty
Abstract:: In this study, we examine salinity stress tolerances of two populations of the invasive species New Zealand mud snail Potamopyrgus antipodarum, one population from a high salinity environment in the Columbia River estuary and the other from a fresh water lake. In 1996, New Zealand mud snails were discovered in...
Resource Type:: Article
Full Text:: and molecular studies Marshal Hoy • Bruce L. Boese • Louise Taylor • Deborah Reusser • Rusty

ScholarsArchive@OSU

Amphipoda: Chapter 39 of The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon. Fourth Edition, Completely Revised and Expanded

Is there a common response to ultraviolet-B radiation by marine phytoplankton?

An introduced Asian parasite threatens northeastern Pacific estuarine ecosystems

A doubled down invasion of the northeast Pacific by the Asian mud shrimp, Upogebia major and its coevolved bopyrid isopod parasite, Orthione griffenis

EPA’s Benthic Habitat Data for Yaquina Estuary

Large medusae in surface waters of the Northern California Current: variability in relation to environmental conditions

Food deprivation affects vertical distribution and activity of a marine fish in a thermal gradient: potential energy-conserving mechanisms

Effect of light on juvenile walleye pollock shoaling and their interaction with predators

Nocturnal feeding of Pacific hake and jack mackerel off the mouth of the Columbia River, 1998-2004: implications for juvenile salmon predation

Salinity adaptation of the invasive New Zealand mud snail (Potamopyrgus antipodarum) in the Columbia River estuary (Pacific Northwest, USA): physiological and molecular studies

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