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Full-Text Articles in Life Sciences
Bottom-Up And Climatic Forcing On The Worldwide Population Of Leatherback Turtles, Vs Saba, Jr Spotilia, Fp Chavez, Ja Musick
Bottom-Up And Climatic Forcing On The Worldwide Population Of Leatherback Turtles, Vs Saba, Jr Spotilia, Fp Chavez, Ja Musick
VIMS Articles
Nesting populations of leatherback turtles (Dermochelys coriacea) in the Atlantic and western Indian Oceans are increasing or stable while those in the Pacific are declining. It has been suggested that leatherbacks in the eastern Pacific may be resource limited due to environmental variability derived from the El Nino Southern Oscillation (ENSO), but this has yet to be tested. Here we explored bottom-up forcing and the responding reproductive output of nesting leatherbacks worldwide. We achieved this through an extensive review of leatherback nesting and migration data and by analyzing the spatial, temporal, and quantitative nature of resources as indicated by net …
Evaluating Recruitment Contribution Of A Selectively Bred Aquaculture Line Of The Oyster, Crassostrea Virginica Used In Restoration Efforts, Jens Carlsson, Ryan B. Carnegie, Jan F. Cordes, Mp Hare, Thomas A. Leggett, Kimberly S. Reece
Evaluating Recruitment Contribution Of A Selectively Bred Aquaculture Line Of The Oyster, Crassostrea Virginica Used In Restoration Efforts, Jens Carlsson, Ryan B. Carnegie, Jan F. Cordes, Mp Hare, Thomas A. Leggett, Kimberly S. Reece
VIMS Articles
Severe over-fishing, habitat degradation, and recent disease impacts have devastated the eastern oyster (Crassostrea virginica) fisherey in the Chesapeake Bay. Several restoration efforts are in progress, including the unconventional approach of seeding reefs with an aquaculture strain selected for disease resistance and fast growth in hopes of mitigating the negative effects of diseases and low census numbers. Supplementation of four sites (The Great Wicomico, Lynnhaven, York and Elizabeth Rivers) examined in this study totaled approximatedly 18,500,000 aquaculture oysters from 2002 to 2006. We collected locally recruited offspring (n = 6517) from 2002 to 2006 at these sites to determine if …
Shell Length-At-Age Relationships In James River, Virginia, Oysters (Crassostrea Virginica) Collected Four Centuries Apart, Juliana M. Harding, Roger L. Mann, Melissa Southworth
Shell Length-At-Age Relationships In James River, Virginia, Oysters (Crassostrea Virginica) Collected Four Centuries Apart, Juliana M. Harding, Roger L. Mann, Melissa Southworth
VIMS Articles
Eastern oysters were ecologically and structurally dominant features of the Chesapeake Bay prior to European colonization. Four centuries of harves pressure, habitat degradation, and more recently, disease activity have affected extant oyster population demographics. We compared population demographics and age-at-shell length relationships for modern mesohaline James River oyster populations with James River oysters collected in the years 1611 to 1612 by Jamestown settlers. Historic oyster collections made by hand included a more complete demographics than modern samples collected with patent longs. Historic oysters had significantly faster growth rates than modern oyster populations. Modern oysters larger than 30-40 mm SL or …
Discrimination Of Nine Crassostrea Oyster Species Based Upon Restriction Fragment-Length Polymorphism Analysis Of Nuclear And Mitochondrial Dna Markers, Jan F. Cordes, Jie Xiao, Kimberly S. Reece
Discrimination Of Nine Crassostrea Oyster Species Based Upon Restriction Fragment-Length Polymorphism Analysis Of Nuclear And Mitochondrial Dna Markers, Jan F. Cordes, Jie Xiao, Kimberly S. Reece
VIMS Articles
A molecular genetic identification key for nine species of Crassostrea oysters was developed based on restriction fragment-length polymorphism (RFLP) analyses of nuclear and mitochondrial DNA markers. Seven of nine species were unambiguosly differentiated based on digestion of the ITS-1 nuclear marker with Hae III an Hinf I. Individual species exhibited one or two RFLP patterns for each restriction endonuclease, and only C. madrasensis and C. iredalei were indistinguishable electrophoretically. All nine species were unambiguosly differentiated based on digestion of the COI mitochondrial marker with Dde I and Hae III. Species exhibited one or two RFLP patterns for each restriction endonuclease, …
Decadal Trends In Age Structure And Recruitment Patterns Of Ocean Quahogs Arctica Islandica From The Mid-Atlantic Bight In Relation To Water Temperature, Juliana M. Harding, Se King, En Powell, Roger Mann
Decadal Trends In Age Structure And Recruitment Patterns Of Ocean Quahogs Arctica Islandica From The Mid-Atlantic Bight In Relation To Water Temperature, Juliana M. Harding, Se King, En Powell, Roger Mann
VIMS Articles
Occan quahogs (Arctica islandica) are long-lived bivalves. Distributionl patterns and biology of ocean quahogs ill the Mid-Atlantic Bight (MAB) off the cast coast of North America are directly related to bottom water temperatures. We examined long term recruitment patterns for ocean quahogs across temporal (decadal) and spatial (latitudinal. bathymetric) scales Using a spatially defined (Long Island Sound to Chesapeake Bay mouth) population encompassing a broad size (age) range of animals that had not yet recruited to the commercial fishery [(SL)], An age-at-length relationship for quahogs less than 80 mm SL is described using a power function. Quahog age did not …
Crassostrea Ariakensis In Chesapeake Bay: Growth, Disease And Mortality In Shallow Subtidal Environments, Kt Paynter, Jd Goodwin, Me Chen, Nj Ward, Mw Sherman, Dw Meritt, Standish K. Allen
Crassostrea Ariakensis In Chesapeake Bay: Growth, Disease And Mortality In Shallow Subtidal Environments, Kt Paynter, Jd Goodwin, Me Chen, Nj Ward, Mw Sherman, Dw Meritt, Standish K. Allen
VIMS Articles
In April 2004, triploid native (Crassostrea virginica) and nonnative (Crassostrea ariakensis) oysters were deployed in cages at four sites along a salinity gradient in Chesapeake Bay. In Maryland, the lowest salinity site was located in the Severn River and two low to mid-salinity sites were located in the Choptank and Patuxent Rivers. The highest salinity site was located in the York River in Virginia. Growth, disease acquisition, and mortality were measured in the deployed oysters through August 2006. Although ANOVA revealed that the nonnative oysters were significantly larger at the end of the experiment than the native oysters at all …
Size-Selectivity Of The Northwest Atlantic Sea Scallop (Placopecten Magellanicus) Dredge, Noelle Yochum, William D. Dupaul
Size-Selectivity Of The Northwest Atlantic Sea Scallop (Placopecten Magellanicus) Dredge, Noelle Yochum, William D. Dupaul
VIMS Articles
A size-selectivity curve was constructed to characterize the performance of the New Bedford style Atlantic sea scallop (Placopecten magellanicus, Gmelin 1791) dredge when it is configured to meet the requirements of Amendment #10 to the Sea Scallop Fishery Management Plan. The curve was generated using the SELECT model on catch-at-length data, obtained by simultaneously towing a New Bedford style dredge and a nonselective National Marine Fisheries Service sea scallop survey dredge from commercial scallop vessels. Data were collected during three cruises in the Northwest Atlantic between 2005 and 2006. The resultant selectivity curve yielded a 50% retention length of 100.1 …
Additional Records Of Deep-Sea Fishes From Off Greater New England, Ke Hartel, Cp Kenaley, Jk Galbraith, Tt Sutton
Additional Records Of Deep-Sea Fishes From Off Greater New England, Ke Hartel, Cp Kenaley, Jk Galbraith, Tt Sutton
VIMS Articles
A recent review of deep-sea fishes captured deeper than 200 m off greater New England, from the Scotian Shelf at 44''N to the southern New England Shelf at about 38°N, documented 591 species. Subsequent trawling activity and reviews of deep-sea taxa occurring in the area have revealed that an additional 40 species inhabit the deep sea off New England. Thirty-two of these new records were eaptured in the course of 44 bottom trawls and 94 mid-water trawls over or in the proximity of Bear Seamount (39''55'N. 67°30'W). Five of the 40 species have been described as new to science, at …