Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 8 of 8
Full-Text Articles in Aquaculture and Fisheries
Abstracts Of Technical Papers, Presented At The 104th Annual Meeting, National Shellfisheries Association, Seattle, Washington, March 24–29, 2012, National Shellfisheries Association
Abstracts Of Technical Papers, Presented At The 104th Annual Meeting, National Shellfisheries Association, Seattle, Washington, March 24–29, 2012, National Shellfisheries Association
VIMS Articles
No abstract provided.
Historical Ecology With Real Numbers: Past And Present Extent And Biomass Of An Imperilled Estuarine Habitat, Psez Ermgassen, Md Spalding, B Blake, Ld Coen, B Dumbauld, Mark Luckenbach, Et Al.
Historical Ecology With Real Numbers: Past And Present Extent And Biomass Of An Imperilled Estuarine Habitat, Psez Ermgassen, Md Spalding, B Blake, Ld Coen, B Dumbauld, Mark Luckenbach, Et Al.
VIMS Articles
Historic baselines are important in developing our understanding of ecosystems in the face of rapid global change. While a number of studies have sought to determine changes in extent of exploited habitats over historic timescales, few have quantified such changes prior to late twentieth century baselines. Here, we present, to our knowledge, the first ever large-scale quantitative assessment of the extent and biomass of marine habitat-forming species over a 100-year time frame. We examined records of wild native oyster abundance in the United States from a historic, yet already exploited, baseline between 1878 and 1935 (predominantly 1885-1915), and a current …
Genetic Structure Of Eurasian Badgers Meles Meles (Carnivora: Mustelidae) And The Colonization History Of Ireland, Db O'Meara, Cj Edwards, Dp Sleeman, Tf Cross, Mj Statham, Jr Mcdowell, Et Al.
Genetic Structure Of Eurasian Badgers Meles Meles (Carnivora: Mustelidae) And The Colonization History Of Ireland, Db O'Meara, Cj Edwards, Dp Sleeman, Tf Cross, Mj Statham, Jr Mcdowell, Et Al.
VIMS Articles
The present study examined the contemporary genetic composition of the Eurasian badger, Meles meles, in Ireland, Britain and Western Europe, using six nuclear microsatellite loci and a 215-bp fragment of the mitochondrial DNA control region. Significant population structure was evident within Europe (global multilocus microsatellite FST = 0.205, P < 0.001; global mitochondrial control region FST = 0.399, P < 0.001). Microsatellite-based cluster analyses detected one population in Ireland, whereas badgers from Britain could be subdivided into several populations. Excluding the island populations of Ireland and Britain, badgers from Western Europe showed further structuring, with evidence of discrete Scandinavian, Central European, and Spanish populations. Mitochondrial DNA cluster analysis grouped the Irish population with Scandinavia and Spain, whereas the majority of British haplotypes grouped with those from Central Europe. The findings of the present study suggest that British and Irish badger populations colonized from different refugial areas, or that there were different waves of colonization from the source population. There are indications for the presence of an Atlantic fringe element, which has been seen in other Irish species. We discuss the results in light of the controversy about natural versus human-mediated introductions. (c) 2012 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, , .
Genetic Diversity Of The Caribbean Spiny Lobster Virus, Panulirus Argus Virus 1 (Pav1), And The Discovery Of Pav1 In Lobster Postlarvae, Ja Moss, Mj Butler, Dc Behringer, Jeffrey D. Shields
Genetic Diversity Of The Caribbean Spiny Lobster Virus, Panulirus Argus Virus 1 (Pav1), And The Discovery Of Pav1 In Lobster Postlarvae, Ja Moss, Mj Butler, Dc Behringer, Jeffrey D. Shields
VIMS Articles
Panulirus argus virus 1 (PaV1) is an unclassified, pathogenic virus first discovered in Caribbean spiny lobsters Panulirus argus from the Florida Keys, USA, and has since been confirmed in lobsters in other parts of the Caribbean. Several studies have examined the prevalence, pathogenicity, and population dynamics of the pathogen in the lobster host, but little is known about the genetic diversity of the virus. We analyzed a fragment of viral DNA from lobsters collected in the Florida Keys, which provided the first insight into the genetic diversity of PaV1. The variation in viral sequences, both within and between individual lobsters, …
The Ross Sea In A Sea Of Change, Walker O. Smith Jr., Pn Sedwick, Kr Arrigo, Dg Ainley, Ah Orsi
The Ross Sea In A Sea Of Change, Walker O. Smith Jr., Pn Sedwick, Kr Arrigo, Dg Ainley, Ah Orsi
VIMS Articles
The Ross Sea, the most productive region in the Antarctic, reaches farther south than any body of water in the world. While its food web is relatively intact, its oceanography, biogeochemistry, and sea ice coverage have been changing dramatically, and likely will continue to do so in the future. Sea ice cover and persistence have been increasing, in contrast to the Amundsen-Bellingshausen sector, which has resulted in reduced open water duration for its biota. Models predict that as the ozone hole recovers, ice cover will begin to diminish. Currents on the continental shelf will likely change in the coming century, …
Two Decades Of Pelagic Ecology Of The Western Antarctic Peninsula, Deborah K. Steinberg, Dg Martinson, Dp Costa
Two Decades Of Pelagic Ecology Of The Western Antarctic Peninsula, Deborah K. Steinberg, Dg Martinson, Dp Costa
VIMS Articles
Significant strides in our understanding of the marine pelagic ecosystem of the Western Antarctic Peninsula (WAP) region have been made over the past two decades, resulting from research conducted aboard ARSV Laurence M. Gould and RVIB Nathaniel B. Palmer. These advances range from an understanding of the physical forcing on biology, to food web ecology (from microbes to top predators), to biogeochemical cycling, often in the larger context of rapid climate warming in the region. The proximity of the WAP to the Antarctic Circumpolar Current and WAP continental shelf bathymetry affects the hydrography and helps structure the biological community. Seasonal, …
The Relationship Between Biophysical Variables And Halocarbon Distributions In The Waters Of The Amundsen And Ross Seas, Antarctica, E Mattson, A Karlsson, Walker O. Smith Jr., K Abrahamsson
The Relationship Between Biophysical Variables And Halocarbon Distributions In The Waters Of The Amundsen And Ross Seas, Antarctica, E Mattson, A Karlsson, Walker O. Smith Jr., K Abrahamsson
VIMS Articles
Little is known regarding the distribution of volatile halogenated organic compounds (halocarbons) in Antarctic waters and their relation to biophysical variables. During the austral summer (December to January) in 2007-08 halocarbon and pigment concentrations were measured in the Amundsen (100-130 degrees W) and Ross Sea (158 degrees W-160 degrees E). In addition, halocarbons were determined in air, snow and sea ice. The distribution of halocarbons was influenced to a large extent by sea ice, and to a much lesser extent by pelagic biota. Concentrations of naturally produced halocarbons were elevated in the surface mixed layer in ice covered areas compared …
Long-Term Increase In Mesozooplankton Biomass In The Sargasso Sea: Linkage To Climate And Implications For Food Web Dynamics And Biogeochemical Cycling, Deborah K. Steinberg, Mw Lomas, Js Cope
Long-Term Increase In Mesozooplankton Biomass In The Sargasso Sea: Linkage To Climate And Implications For Food Web Dynamics And Biogeochemical Cycling, Deborah K. Steinberg, Mw Lomas, Js Cope
VIMS Articles
Changes in zooplankton biomass and species composition over long time scales can have significant effects on biogeochemical cycling and transfer of energy to higher trophic levels. We analyzed size-fractionated mesozooplankton biomass (>200 mu m) from biweekly to monthly day and night tows taken from 1994 to 2010 in the epipelagic zone at the Bermuda Atlantic Time series Study (BATS) site in the oligotrophic North Atlantic subtropical gyre. During this 17-year period total mesozooplankton biomass increased 61% overall, although a few short-term downturns occurred over the course of the time series. The overall increase was higher in the nighttime compared …