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Animal Sciences

VIMS Articles

2017

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Articles 31 - 33 of 33

Full-Text Articles in Life Sciences

Linking The Abundance Of Estuarine Fish And Crustaceans In Nearshore Waters To Shoreline Hardening And Land Cover, Ms Kornis, D Breitburg, R Balouskus, Donna M. Bilkovic, La Davias, Rochelle D. Seitz, Et Al. Jan 2017

Linking The Abundance Of Estuarine Fish And Crustaceans In Nearshore Waters To Shoreline Hardening And Land Cover, Ms Kornis, D Breitburg, R Balouskus, Donna M. Bilkovic, La Davias, Rochelle D. Seitz, Et Al.

VIMS Articles

Human alteration of land cover (e.g., urban and agricultural land use) and shoreline hardening (e.g., bulkheading and rip rap revetment) are intensifying due to increasing human populations and sea level rise. Fishes and crustaceans that are ecologically and economically valuable to coastal systems may be affected by these changes, but direct links between these stressors and faunal populations have been elusive at large spatial scales. We examined nearshore abundance patterns of 15 common taxa across gradients of urban and agricultural land cover as well as wetland and hardened shoreline in tributary subestuaries of the Chesapeake Bay and Delaware Coastal Bays. …


Mechanisms Governing Ontogenetic Habitat Shifts: Role Of Trade-Offs, Predation, And Cannibalism For The Blue Crab, Amanda Bromilow, Romauld Lipcius Jan 2017

Mechanisms Governing Ontogenetic Habitat Shifts: Role Of Trade-Offs, Predation, And Cannibalism For The Blue Crab, Amanda Bromilow, Romauld Lipcius

VIMS Articles

Nursery habitats play a major role in the population dynamics of marine and estuarine species, with the blue crab Callinectes sapidus serving as a model invertebrate. The current paradigm of blue crab habitat use postulates that juvenile survival decreases with size in submerged aquatic vegetation (SAV) due to a reduction in suitably scaled refuge, triggering an ontogenetic shift from SAV to unvegetated habitats. However, alternative mechanisms for this habitat shift have not been examined. We evaluated the paradigm of blue crab habitat use by conducting field tethering experiments in York River (Virginia, USA) nursery habitats using a broad range of …


Recovery Of Visual Function In Pacific Halibut (Hippoglossus Stenolepis) After Exposure To Bright Light, Christopher Magel, Clifford Ryer, Richard Brill Jan 2017

Recovery Of Visual Function In Pacific Halibut (Hippoglossus Stenolepis) After Exposure To Bright Light, Christopher Magel, Clifford Ryer, Richard Brill

VIMS Articles

Commercial fishing exposes Pacific halibut (Hippoglossus stenolepis) to a myriad of stressors during capture, processing, and discarding, including exposure to direct sunlight that causes diminished retinal sensitivity. It is unknown, however, whether recovery occurs. We therefore employed both electroretinography and a behavioral assay to measure recovery of retinal sensitivity and visual function in halibut exposed to 15 min of simulated sunlight. We used electroretinography to measure changes in retinal light sensitivity after recovery periods of 2, 4, 6 and 10 weeks and a behavioral assay to measure responsiveness to simulated prey (i.e., in behavioral trials) to measure visual function after …