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VIMS Articles

2008

Aquaculture and Fisheries

Fisheries Science Peer-Reviewed Articles

Articles 1 - 11 of 11

Full-Text Articles in Life Sciences

Mycobacteriosis-Associated Mortality In Wild Striped Bass (Morone Saxatilis) From Chesapeake Bay, Usa, Dt Gauthier, R J. Latour, Dm Helsey, C F. Bonzek, J Gartland, Ej Burge, W. K. Vogelbein Oct 2008

Mycobacteriosis-Associated Mortality In Wild Striped Bass (Morone Saxatilis) From Chesapeake Bay, Usa, Dt Gauthier, R J. Latour, Dm Helsey, C F. Bonzek, J Gartland, Ej Burge, W. K. Vogelbein

VIMS Articles

The striped bass (Morone saxatilis) is an economically and ecologically important finfish species along the Atlantic seaboard of the United States. Recent stock assessments in Chesapeake Bay (USA) indicate that non-fishing mortality in striped bass has increased since 1999, concomitant with very high (>50%) prevalence of visceral and dermal disease caused by Mycobacterium spp. Current fishery assessment models do not differentiate between disease and other components of non-fishing mortality (e. g., senescence, predation); therefore, disease impact on the striped bass population has not been established. Specific measurement of mortality associated with mycobacteriosis in wild striped bass is complicated because …


Abstracts Of Technical Papers Presented At The 100th Annual Meeting National Shellfisheries Association Providence, Rhode Island April 6–10, 2008, National Shellfisheries Association Aug 2008

Abstracts Of Technical Papers Presented At The 100th Annual Meeting National Shellfisheries Association Providence, Rhode Island April 6–10, 2008, National Shellfisheries Association

VIMS Articles

No abstract provided.


Us Caribbean Fish Trap Fishery Socioeconomic Study, Jj Agar, Jr Waters, M Valdes-Pizzini, M Shivlani, T Murray, Je Kirkley, D Suman May 2008

Us Caribbean Fish Trap Fishery Socioeconomic Study, Jj Agar, Jr Waters, M Valdes-Pizzini, M Shivlani, T Murray, Je Kirkley, D Suman

VIMS Articles

Concerns over the potential impacts of trap fishing on coral reefs and associated habitats prompted a socioeconomic study to characterize the U.S. Caribbean fish trap fishery in anticipation of management actions. Stratified random interviews of one hundred fishermen revealed the presence of a diverse fishery, with appreciable inter-island differences in levels of fishing dependence, fishing practices, and capital investment. High levels of fishing dependence Were observed among fishermen in the U.S. Virgin Islands, whereas Puerto Rican fishermen exhibited a more diversified livelihood strategy. Fishermen from St. Croix derived 62% of their household income from fish traps, significantly more than fishermen …


Comparative Visual Function In Five Sciaenid Fishes Inhabiting Chesapeake Bay, Az Horodysky, Richard Brill, Ej Warrant, Ja Musick, Rj Latour Jan 2008

Comparative Visual Function In Five Sciaenid Fishes Inhabiting Chesapeake Bay, Az Horodysky, Richard Brill, Ej Warrant, Ja Musick, Rj Latour

VIMS Articles

Maintaining optimal visual performance is a difficult task in the photodynamic coastal and estuarine waters in which western North Atlantic sciaenid fishes support substantial commercial and recreational fisheries. Unavoidable tradeoffs exist between visual sensitivity and resolution, yet sciaenid visual systems have not been characterized despite strong species-specific ecomorphological and microhabitat differentiation. We therefore used electroretinographic techniques to describe the light sensitivities, temporal properties, and spectral characteristics of the visual systems of five sciaenids common to Chesapeake Bay, USA: weakfish (Cynoscion regalis), spotted seatrout (Cynoscion nebulosus), red drum (Sciaenops ocellatus), Atlantic croaker (Micropogonias undulatus) and spot (Leiostomus xanthurus). Benthic sciaenids exhibited …


Effects Of Rapid Decompression And Exposure To Bright Light On Visual Function In Black Rockfish (Sebastes Melanops) And Pacific Halibut (Hippoglossus Stenolepis), Richard Brill, Christopher Magel, Michael Davis, Robert Hannah, Polly Rankin Jan 2008

Effects Of Rapid Decompression And Exposure To Bright Light On Visual Function In Black Rockfish (Sebastes Melanops) And Pacific Halibut (Hippoglossus Stenolepis), Richard Brill, Christopher Magel, Michael Davis, Robert Hannah, Polly Rankin

VIMS Articles

Demersal Fishes hauled up from depth experience rapid decompression. In physoclists, this can cause overexpansion of the swim bladder and resultant injuries to multiple organs (barotrauma), including severe exophthalmia ("pop-eye"). Before release, fishes can also be subjected to asphyxia and exposure to direct sunlight. Little is known, however, about possible sensory deficits resulting from the events accompanying capture. To address this issue, electroretinography was used to measure the changes in retinal light sensitivity, flicker fusion frequency, and spectral sensitivity in black rockfish (Sebastes melanops) subjected to rapid decompression (from 4 atmospheres absolute [ATA] to 1 ATA) and Pacific halibut (Hippoglossus …


Acoustic Pressure And Particle Motion Thresholds In Six Sciaenid Fishes, Az Horodysky, Richard Brill, Ml Fine, Ja Musick, Rj Latour Jan 2008

Acoustic Pressure And Particle Motion Thresholds In Six Sciaenid Fishes, Az Horodysky, Richard Brill, Ml Fine, Ja Musick, Rj Latour

VIMS Articles

Sciaenid fishes are important models of fish sound production, but investigations into their auditory abilities are limited to acoustic pressure measurements on five species. In this study, we used auditory brainstem response ( ABR) to assess the pressure and particle acceleration thresholds of six sciaenid fishes commonly found in Chesapeake Bay, eastern USA: weakfish ( Cynoscion regalis), spotted seatrout ( Cynoscion nebulosus), Atlantic croaker ( Micropogonias undulatus), red drum ( Sciaenops ocellatus), spot ( Leiostomus xanthurus) and northern kingfish ( Menticirrhus saxatilis). Experimental subjects were presented with pure 10 ms tone bursts in 100 Hz steps from 100 Hz to …


Stock Assessment Of Protogynous Fish: Evaluating Measures Of Spawning Biomass Used To Estimate Biological Reference Points, En Brooks, Kw Shertzer, T Gedamke, Ds Vaughan Jan 2008

Stock Assessment Of Protogynous Fish: Evaluating Measures Of Spawning Biomass Used To Estimate Biological Reference Points, En Brooks, Kw Shertzer, T Gedamke, Ds Vaughan

VIMS Articles

In stock assessments, recruitment is typically modeled as a function of females only. For protogynous stocks, however, disproportionate fishing on males increases the possibility of reduced fertilization rates. To incorporate the importance of males in protogynous stocks, assessment models have been used to predict recruitment not just from female spawning biomass (S-f), but also from that of males (S-m) or both sexes (S-b). We conducted a simulation study to evaluate the ability of these three measures to estimate biological reference points used in fishery management. Of the three, S-f provides best estimates if the potential for decreased fertilization is weak, …


Population Structure Of Striped Marlin (Kajikia Audax) In The Pacific Ocean Based On Analysis Of Microsatellite And Mitochondrial Dna, Jr Mcdowell, J. E. Graves Jan 2008

Population Structure Of Striped Marlin (Kajikia Audax) In The Pacific Ocean Based On Analysis Of Microsatellite And Mitochondrial Dna, Jr Mcdowell, J. E. Graves

VIMS Articles

Genetic variation was surveyed at five microsatellite loci and the mitochondrial control region (819 bp) to test for the presence of genetic stock structure in striped marlin (Kajikia audax) collections taken from seven locations throughout the Pacific Ocean. Temporal replicates separated by 9 years were taken off Japan, and three temporal samples spanning 11 years were collected off the coast of eastern Australia. Analyses of multilocus microsatellite genotypes and mitochondrial control region sequences showed no significant heterogeneity among collections taken from the same location in different years; however, significant spatial genetic heterogeneity was observed across all samples for microsatellite markers …


The Influence Of Beam Position And Swimming Direction On Fish Target Strength, Mj Henderson, Jk Horne, Rh Towler Jan 2008

The Influence Of Beam Position And Swimming Direction On Fish Target Strength, Mj Henderson, Jk Horne, Rh Towler

VIMS Articles

Fish orientation is consistently identified as a major influence on fish target strength (TS). Generally, orientation is defined as the tilt angle of the fish with respect to the acoustic transducer, whereas a more accurate definition includes tilt, roll, and yaw. Thus far, the influences of roll and yaw on fish TS have only been examined cursorily. We used in situ single-target data to create fish tracks, to estimate fish tilt and yaw, and correlated these estimates with TS. The results show that tilt, yaw, and beam position have a significant influence on fish TS. To investigate further how yaw …


The Trophic Dynamics Of Summer Flounder (Paralichthys Dentatus) In Chesapeake Bay, Robert J. Latour, James Gartland, Christopher F. Bonzek, Raemarie Johnson Jan 2008

The Trophic Dynamics Of Summer Flounder (Paralichthys Dentatus) In Chesapeake Bay, Robert J. Latour, James Gartland, Christopher F. Bonzek, Raemarie Johnson

VIMS Articles

Data on the trophic dynamics of fishes are needed for management of ecosystems such as Chesapeake Bay. Summer flounder (Paralichthys dentatus) are an abundant seasonal resident of the bay and have the potential to impact food-web dynamics. Analyses of diet data for late juvenile and adult summer flounder collected from 2002-2006 in Chesapeake Bay were conducted to characterize the role of this flatfish in this estuary and to contribute to our understanding of summer flounder trophic dynamics throughout its range. Despite the diversity of prey, nearly half of the diet comprised mysid shrimp (Neomysis spp.) and bay anchovy (Anchoa mitchilli). …


Additional Records Of Deep-Sea Fishes From Off Greater New England, Ke Hartel, Cp Kenaley, Jk Galbraith, Tt Sutton Jan 2008

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 …