Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
Migratory And Within-Estuary Behaviors Of Adult Summer Flounder (Paralichthys Dentatus) In A Lagoon System Of The Southern Mid-Atlantic Bight, Karen M. Capossela, Mary C. Fabrizio, Richard Brill
Migratory And Within-Estuary Behaviors Of Adult Summer Flounder (Paralichthys Dentatus) In A Lagoon System Of The Southern Mid-Atlantic Bight, Karen M. Capossela, Mary C. Fabrizio, Richard Brill
VIMS Articles
We monitored the movements of 45 adult Summer Flounder (Paralichthys dentatus) between June 2007 and July 2008 through the use of passive acoustic telemetry to elucidate migratory and within-estuary behaviors in a lagoon system of the southern mid-Atlantic Bight. Between 8 June and 10 October 2007, fish resided primarily in the deeper (>3 m) regions of the system and exhibited low levels of large-scale (100s of meters) activity. Mean residence time within this estuarine lagoon system was conservatively estimated to be 130 days (range: 18-223 days), which is 1.5 times longer than the residence time previously reported for Summer …
Indication Of Density-Dependent Changes In Growth And Maturity Of The Barndoor Skate On Georges Bank, Karson Coutre, Todd Gedamke, David Rudders, William B. Driggers Iii, David M. Koester, James A. Sulikowski
Indication Of Density-Dependent Changes In Growth And Maturity Of The Barndoor Skate On Georges Bank, Karson Coutre, Todd Gedamke, David Rudders, William B. Driggers Iii, David M. Koester, James A. Sulikowski
VIMS Articles
Drastic increases or decreases in biomass often result in density-dependent changes in life history characteristics within a fish population. Acknowledging this phenomenon and in light of the recent biomass increase in Barndoor Skate Dipturus laevis, the current study re-evaluated the growth rate and sexual maturity of 244 specimens collected from 2009-2011within closed areas I and II on Georges Bank, USA. Ages were estimated using vertebral band counts from skate that ranged from 21 to 129cm TL. The von Bertalanffy growth function was applied to pooled age-at-length data. Parameter estimates from the current study of L = 155cm TL and k …
Visual Acuity In Pelagic Fishes And Mollusks, Yl Gagnon, Tt Sutton, S Johnsen
Visual Acuity In Pelagic Fishes And Mollusks, Yl Gagnon, Tt Sutton, S Johnsen
VIMS Articles
In the sea, visual scenes change dramatically with depth. At shallow and moderate depths (<1000 >m), there is enough light for animals to see the surfaces and shapes of prey, predators, and conspecifics. This changes below 1000 m, where no downwelling daylight remains and the only source of light is bioluminescence. These different visual scenes require different visual adaptations and eye morphologies. In this study we investigate how the optical characteristics of animal lenses correlate with depth and ecology. We measured the radius, focal length, and optical quality of the lenses of pelagic fishes, cephalopods, and a gastropod using a …
Patterns And Drivers Of The Demersal Fish Community Of Chesapeake Bay, Andre Buchheister, Christopher F. Bonzek, James Gartland, Robert J. Latour
Patterns And Drivers Of The Demersal Fish Community Of Chesapeake Bay, Andre Buchheister, Christopher F. Bonzek, James Gartland, Robert J. Latour
VIMS Articles
Large-scale research on the environmental, biological, and anthropogenic drivers of fish distributions, abundances, and community structure can identify patterns and trends within systems, provide mechanistic insight into ecosystem functioning, and contribute to ecosystembased fisheries management. This study synthesized 10 yr of extensive fisheries-independent bottom trawl data (2002 to 2011) to evaluate drivers of demersal fish community structure in Chesapeake Bay, the largest estuary in the United States. Changes in community composition were assessed using constrained correspondence analysis. Also, aggregate community metrics (species richness, Simpson diversity, and catch-per-unit-effort [CPUE] of species groups) were modeled using generalized additive models. Five species (Atlantic …
Habitat Associations And Dispersal Of Black Sea Bass From A Mid-Atlantic Bight Reef, Mary C. Fabrizio, John P. Manderson, Jeffrey P. Pessutti
Habitat Associations And Dispersal Of Black Sea Bass From A Mid-Atlantic Bight Reef, Mary C. Fabrizio, John P. Manderson, Jeffrey P. Pessutti
VIMS Articles
We examined habitat associations of 122 adult black sea bass Centropristis striata at a temperate reef off the coast of New Jersey, USA. The study site, located within the Historic Area Remediation Site, encompassed 46.1 km2 and included areas of rocky bottom and highly variable bathymetry. Factors influencing dispersal and habitat use were determined from acoustic tele - metry data collected between May and December 2003 from a grid of 72 moored receivers. About 2.7 times as many black sea bass used the site in summer as in fall. Fish were associated with relatively shallow, complex habitats characterized by previously …