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Full-Text Articles in Aquaculture and Fisheries
Temporal Dynamics Of Condition For Estuarine Fishes In Their Nursery Habitats, R. W. Schloesser, Mary C. Fabrizio
Temporal Dynamics Of Condition For Estuarine Fishes In Their Nursery Habitats, R. W. Schloesser, Mary C. Fabrizio
VIMS Articles
The condition of individuals in a year class may contribute to recruitment variability due to differential survival of poor-and well-conditioned fish, but the temporal dynamics of juvenile fish condition are poorly understood. We examined inter- and intra-annual dynamics of condition for juveniles of 3 species collected from estuarine nursery areas of Chesapeake Bay from November 2010 to June 2014. We describe temporal patterns in length-based indices, the hepatosomatic index (HSI), and relative subdermal lipid estimates for juvenile summer flounder Paralichthys dentatus (n = 1771), Atlantic croaker Micropogonias undulatus (n = 3911), and striped bass Morone saxatilis (n = 874). Multiple …
Quantitative Validation Of A Habitat Suitability Index For Oyster Restoration, Seth J. Theuerkauf, Rom Lipcius
Quantitative Validation Of A Habitat Suitability Index For Oyster Restoration, Seth J. Theuerkauf, Rom Lipcius
VIMS Articles
Habitat suitability index (HSI) models provide spatially explicit information on the capacity of a given habitat to support a species of interest, and their prevalence has increased dramatically in recent years. Despite caution that the reliability of HSIs must be validated using independent, quantitative data, most HSIs intended to inform terrestrial and marine species management remain unvalidated. Furthermore, of the eight HSI models developed for eastern oyster (Crassostrea virginica) restoration and fishery production, none has been validated. Consequently, we developed, calibrated, and validated an HSI for the eastern oyster to identify optimal habitat for restoration in a tributary …
Fishing And Bottom Water Temperature As Drivers Of Change In Maximum Shell Length In Atlantic Surfclams (Spisula Solidissima), Dm Munroe, Da Narvaez, D Hennen, L Jacobson, Roger L. Mann, Et Al
Fishing And Bottom Water Temperature As Drivers Of Change In Maximum Shell Length In Atlantic Surfclams (Spisula Solidissima), Dm Munroe, Da Narvaez, D Hennen, L Jacobson, Roger L. Mann, Et Al
VIMS Articles
Maximum shell length of Atlantic surfclams (Spisula solidissima) on the Middle Atlantic Bight (MAB) continental shelf, obtained from federal fishery survey data from 1982-present, has decreased by 15-20 mm. Two potential causes of this decreasing trend, fishery removal of large animals and stress due to warming bottom temperatures, were investigated using an individual-based model for post-settlement surfclams and a fifty-year hindcast of bottom water temperatures on the MAB. Simulations showed that fishing and/or warming bottom water temperature can cause decreases in maximum surfclam shell length (body size) equivalent to those observed in the fished stock. Independently, either localized fishing rates …
Evaluation Of Cytochalasin B And 6-Dimethylaminopurine For Tetraploidy Induction In The Eastern Oyster, Crassostrea Virginica, Bl Peachey, Standish K. Allen Jr.
Evaluation Of Cytochalasin B And 6-Dimethylaminopurine For Tetraploidy Induction In The Eastern Oyster, Crassostrea Virginica, Bl Peachey, Standish K. Allen Jr.
VIMS Articles
Cytochalasin B (CB) has been used to induce tetraploidy in oysters since the practice began in 1993. However, CB is toxic and presents health risks to hatchery workers who administer the treatment. 6-dimethylaminopurine (6-DMAP) is also an effective cytokinetic inhibitor, and does not carry the health risks of CB. We examined the relative effectiveness of 6-DMAP vs CB for producing tetraploids in the Eastern oyster (Crassostrea virginica). Survival and yield of tetraploids varied widely among the 15 experiments. Larvae resulting from 6-DMAP treatment had higher survival in 11 of the 14 trials on day two and day six/seven. For yield …
Physiological Stress And Post-Release Mortality Of White Marlin (Kajikia Albida) Caught In The United States Recreational Fishery, Lela S. Schlenker, Robert J. Latour, Richard Brill, John Graves
Physiological Stress And Post-Release Mortality Of White Marlin (Kajikia Albida) Caught In The United States Recreational Fishery, Lela S. Schlenker, Robert J. Latour, Richard Brill, John Graves
VIMS Articles
White marlin, a highly migratory pelagic marine fish, support important commercial and recreational fisheries throughout their range in the tropical and subtropical Atlantic Ocean. More than 10 000 individuals can be caught annually in the United States recreational fishery, of which the vast majority are captured on circle hooks and released alive. The probability of post-release mortality of white marlin released from circle hooks has been documented to be
Vertical Movements Of Shortfin Mako Sharks Isurus Oxyrinchus In The Western North Atlantic Ocean Are Strongly Influenced By Temperature, Jeremy J. Vaudo, Bradley M. Wetherbee, Anthony D. Wood, Kevin C. Weng, Et Al
Vertical Movements Of Shortfin Mako Sharks Isurus Oxyrinchus In The Western North Atlantic Ocean Are Strongly Influenced By Temperature, Jeremy J. Vaudo, Bradley M. Wetherbee, Anthony D. Wood, Kevin C. Weng, Et Al
VIMS Articles
Although shortfin mako sharks Isurus oxyrinchus are regularly encountered in pelagic fisheries, limited information is available on their vertical distribution and is primarily restricted to cooler areas of their geographic range. We investigated the vertical movements of mako sharks across differing temperature regimes within the western North Atlantic by tagging 8 individuals with pop-up satellite archival tags off the northeastern United States and the Yucatan Peninsula, Mexico. Depth and temperature records across 587 d showed vertical movements strongly associated with ocean temperature. Temperatures150 m compared to only 1% in the coldest water columns. The sharks showed diel diving behavior, with …
Variability In Fish Tissue Proximate Composition Is Consistent With Indirect Effects Of Hypoxia In Chesapeake Bay Tributaries, Troy D. Tuckey, Mary C. Fabrizio
Variability In Fish Tissue Proximate Composition Is Consistent With Indirect Effects Of Hypoxia In Chesapeake Bay Tributaries, Troy D. Tuckey, Mary C. Fabrizio
VIMS Articles
The spatial and temporal extent of summer hypoxia (dissolved oxygen [DO] concentration
An Individual-Based Approach To Year-Class Strength Estimation, S Thanassekos, Rj Latour, Mary C. Fabrizio
An Individual-Based Approach To Year-Class Strength Estimation, S Thanassekos, Rj Latour, Mary C. Fabrizio
VIMS Articles
Estimating year-class strength-the number of larvae hatched in a given year-from survey data is key to investigating fish population dynamics. Year-class strength can be estimated from catch-at-age data using catch curves. In practice, most catch-curve assumptions are violated, which can result in spurious estimates of year-class strength. Among the simplifying assumptions is that pooling individuals into annual age-classes provides a representation of the population age structure that is adequate for estimating mortality. This oversimplification is unnecessary when age data are available at finer scales, and can lead to biased results. We present a new method to estimate past year-class strength …
How Well Do We Know The Infaunal Biomass Of The Continental Shelf?, En Powell, Roger L. Mann
How Well Do We Know The Infaunal Biomass Of The Continental Shelf?, En Powell, Roger L. Mann
VIMS Articles
Benthic infauna comprise a wide range of taxa of varying abundances and sizes, but large infaunal taxa are infrequently recorded in community surveys of the shelf benthos. These larger, but numerically rare, species may contribute disproportionately to biomass, however. We examine the degree to which standard benthic sampling gear and survey design provide an adequate estimate of the biomass of large infauna using the Atlantic surfclam, Spisula solidissima, on the continental shelf off the northeastern coast of the United States as a test organism. We develop a numerical model that simulates standard survey designs, gear types, and sampling densities to …
Hidden In Plain Sight: Cryptic And Endemic Malaria Parasites In North American White-Tailed Deer (Odocoileus Virginianus), Es Martinsen, N Mcinerney, H Brightman, K Ferebee, T Walsh, Et Al.
Hidden In Plain Sight: Cryptic And Endemic Malaria Parasites In North American White-Tailed Deer (Odocoileus Virginianus), Es Martinsen, N Mcinerney, H Brightman, K Ferebee, T Walsh, Et Al.
VIMS Articles
Malaria parasites of the genus Plasmodium are diverse in mammal hosts, infecting five mammalian orders in the Old World, but were long considered absent from the diverse deer family (Cervidae) and from New World mammals. There was a description of a Plasmodium parasite infecting a single splenectomized white-tailed deer (WTD; Odocoileus virginianus) in 1967 but none have been reported since, which has proven a challenge to our understanding of malaria parasite biogeography. Using both microscopy and polymerase chain reaction, we screened a large sample of native and captive ungulate species from across the United States for malaria parasites. We found …
Parallelism And Epistasis In Skeletal Evolution Identified Through Use Of Phylogenomic Mapping Strategies, Jm Daane, N Rohner, P Konstantinidis, S Djuranovic, Mp Harris
Parallelism And Epistasis In Skeletal Evolution Identified Through Use Of Phylogenomic Mapping Strategies, Jm Daane, N Rohner, P Konstantinidis, S Djuranovic, Mp Harris
VIMS Articles
The identification of genetic mechanisms underlying evolutionary change is critical to our understanding of natural diversity, but is presently limited by the lack of genetic and genomic resources for most species. Here, we present a new comparative genomic approach that can be applied to a broad taxonomic sampling of nonmodel species to investigate the genetic basis of evolutionary change. Using our analysis pipeline, we show that duplication and divergence of fgfr1a is correlated with the reduction of scales within fishes of the genus Phoxinellus. As a parallel genetic mechanism is observed in scale-reduction within independent lineages of cypriniforms, our finding …