Hudson River Fishes and their Environment

2006 ◽  
Keyword(s):  
Striped Bass ◽  
Hudson River ◽  
Maximum Distance ◽  
Stock Size

<em>Abstract.</em>—Our objective was to determine if dispersal of age-2+ striped bass out of the Hudson River was affected by cohort abundance or stock size. We evaluated dispersal using the location of tagged age-2+ striped bass (in or outside of the Hudson River) and distance from the mouth of the Hudson River when they were recaptured by anglers. The proportion of age-2+ striped bass recaptured outside the Hudson River annually during May was significantly and positively correlated with cohort abundance (<em>r </em>= 0.978, <EM>P </EM>< 0.001), but not with stock size <em>(r </em>= 0.739, <EM>P </EM>= 0.094). The maximum distance at which an age-2+ striped bass was recaptured outside the Hudson River annually was also significantly and positively correlated with cohort abundance (<em>r </em>= 0.869, <EM>P </EM>< 0.025). Therefore, it appears that dispersal of age-2+ striped bass out of the Hudson River was densitydependent and due to cohort abundance.

Dispersal of Young-of-the-Year Hatchery Striped Bass in the Hudson River

1991 ◽  
Vol 11 (3) ◽  
pp. 381-392 ◽  
Author(s):  
Alan W. Wells ◽  
Donna M. Randall ◽  
Dennis J. Dunning ◽  
John R. Young
Keyword(s):  
Striped Bass ◽  
Hudson River ◽  
Young Of The Year

Tag Retention by, and Tagging Mortality of, Hudson River Striped Bass

1987 ◽  
Vol 7 (4) ◽  
pp. 535-538 ◽  
Author(s):  
Dennis J. Dunning ◽  
Quentin E. Ross ◽  
John R. Waldman ◽  
Mark T. Mattson
Keyword(s):  
Striped Bass ◽  
Hudson River ◽  
Tag Retention

Hudson River Fishes and their Environment

2006 ◽  
Keyword(s):  
Striped Bass ◽  
River Estuary ◽  
Circulation Model ◽  
Hudson River ◽  
Hudson River Estuary ◽  
Freshwater Flow ◽  
East River ◽  
Particle Tracking Model ◽  
Tracking Model ◽  
Neutrally Buoyant

<em>Abstract.</em>—Our objectives were to determine if striped bass <em>Morone saxatilis </em>larvae were present in the East River and if so, could they have come from the Hudson River. To meet the first objective, we examined entrainment data collected at the Charles Poletti Power Plant (Poletti) during the years 1999 through 2002. To meet the second objective, we examined the simulated release of 168,000 neutrally buoyant, passive particles in the lower Hudson River Estuary, using a particle-tracking model that was linked to an estuarine circulation model. We also compared the abundance of striped bass post-yolk-sac larvae (PYSL) collected in the East River at Poletti with the abundance of striped bass PYSL collected in the Battery region of the lower Hudson River Estuary and the abundance of striped bass PYSL in the Battery region with freshwater flow in the estuary. Striped bass PYSL were collected by entrainment sampling in the East River at Poletti every year from 1999 through 2002. The striped bass PYSL in the East River probably came from the Hudson River Estuary because the median probability that neutrally buoyant, passive particles would be transported from the lower Hudson River Estuary to the upper East River and western Long Island Sound was 0.12, with a median transport time of 2 d, and because the mean density of striped bass PYSL was highest at Poletti and in the Battery region during the same year. The abundance of striped bass PYSL in the Battery region was higher when freshwater flow during May and early June was higher.

Catch and Release in Marine Recreational Fisheries

2002 ◽  
Keyword(s):  
Striped Bass ◽  
Growth Parameters ◽  
Size Composition ◽  
Hudson River ◽  
Sensitivity Analyses ◽  
Selective Mortality ◽  
River Population ◽  
Spawning Stock ◽  
The Mean ◽  
Size Limits

<em> Abstract.</em>—One component of the management regimen employed to rebuild the Atlantic coastal migratory stock of striped bass <em> Morone saxatilis </em>was the imposition of large size limits to reduce fishing mortality to zero, on the 1982 and subsequent year-classes, until 95% of the females had an opportunity to reproduce at least once. Such size limits introduce size-selective mortality that favors the survival of slower-growing members of the population and may select for slower growth in succeeding generations. Size-at-age data from the Hudson River population were used to examine the effect of alternative size limits on the length distributions of survivors by age using simulation. The results indicate that minimum sizes currently in use can cause profound changes in the size composition of the spawning stock. The mean asymptotic length of unfertilized eggs under equilibrium conditions was estimated as an index of the extent to which these changes may influence future growth. With the current best estimates of growth parameters and fecundity at size, this index was reduced by only about 3%. However, because of the size-selective mortality in the existing fishery and uncertainty arising from sampling difficulties, growth is probably poorly characterized by the existing data. Sensitivity analyses revealed that some reasonable combinations of growth and minimum sizes can induce changes in the mean asymptotic length of unfertilized eggs by more than 10%, which would be about 30% in terms of asymptotic mean weight. The extent to which this selective force might be expressed in succeeding generations is uncertain. However, reliance on minimum sizes to constrain catch has the potential to cause profound changes in growth and probably should not be adopted for long-term management of striped bass until this problem is better understood.

Activity-related constraints on overwintering young-of-the-year striped bass (Morone saxatilis)

2001 ◽  
Vol 79 (1) ◽  
pp. 129-136 ◽  
Author(s):  
Thomas P Hurst ◽  
David O Conover
Keyword(s):  
Food Consumption ◽  
Striped Bass ◽  
Morone Saxatilis ◽  
Metabolic Cost ◽  
Hudson River ◽  
Energetic Cost ◽  
Energy Budgets ◽  
Swimming Velocity ◽  
Thermal Dependence ◽  
Young Of The Year

The importance of activity to overwintering fishes has received little attention. Activity imposes two constraints: maximum swimming speed limits habitats that can be occupied for short periods of time, while the metabolic cost of swimming limits the habitats that are suitable for long-term residence. We measured the energetic consequences of activity and maximum swimming speeds of young-of-the-year striped bass (Morone saxatilis), a species that overwinters in tidal estuaries. The energetic cost of swimming was determined from energy changes in unfed fish forced to swim at various speeds, while energy changes in fed fish provided a measure of their ability to offset swimming costs through feeding. In high-velocity treatments, mortality was size-dependent and appeared to be related to fatigue rather than to depletion of energy reserves. The energetic cost of swimming increased with swimming velocity, but fish increased food consumption and thereby met their metabolic needs. In a second experiment the thermal dependence of swimming capacity in winter-acclimated striped bass was measured. Swimming speeds increased with temperature, from 2.7 body lengths (BL)/s at 2°C to 4.8 BL/s at 8 and 11°C, but were considerably below observed flow velocities in the Hudson River, suggesting a need for behavioral or physical refuge from tidal currents. These results indicate the flexibility of energy budgets of overwintering fishes, allowing energetic stress to be minimized by reducing activity or elevating food-consumption rates when sufficient prey are available.

scholarly journals Population Genetic Assessment of Anadromous and Resident Striped Bass (Morone saxatilis) in the Roanoke River System, Eastern United States

Fishes ◽  
2020 ◽  
Vol 5 (3) ◽  
pp. 24
Author(s):  
Sheila C. Harris ◽  
W. Robert Cope ◽  
Isaac Wirgin ◽  
Eric M. Hallerman
Keyword(s):  
South Carolina ◽  
Genetic Variation ◽  
Striped Bass ◽  
Population Genetic ◽  
System Analysis ◽  
Hudson River ◽  
Mountain Lake ◽  
River Drainage ◽  
Population Genetic Differentiation ◽  
Roanoke River

Striped bass is the subject of important commercial and sport fisheries in North America. The Roanoke River drainage—especially Smith Mountain Lake, Leesville Lake, and Kerr Reservoir—has popular recreational striped bass fisheries. After construction of five hydroelectric dams, populations became landlocked, declined, and have been supplemented by stocking. A key basis for responsibly augmenting populations is to characterize genetic variation and incorporate the findings into responsible hatchery and stocking practices. Genetic variation at 12 microsatellite DNA loci was evaluated among 837 striped bass representing 16 collections across the native range; populations from rivers in South Carolina, North Carolina, Chesapeake Bay, and Hudson River were screened to provide context for assessing genetic structure within the Roanoke system. Analysis of population genetic differentiation showed landlocked Roanoke River striped bass to be distinctive. Subject to genetic isolation, high M ratios, and relatively low Ne estimates suggest loss of genetic variation, and relatedness analysis showed heightened frequencies of related individuals. These insights into population genetics, demographics, and existing guidelines for broodstock acquisition and mating designs can inform genetically cognizant hatchery management and stocking for striped bass in the Roanoke River drainage. In particular, we recommend the use of larger numbers of breeders and factorial mating designs to increase the genetic diversity of propagated striped bass stocked within the Roanoke River drainage.

Linking Habitat Use of Hudson River Striped Bass to Accumulation of Polychlorinated Biphenyl Congeners

2000 ◽  
Vol 34 (6) ◽  
pp. 1023-1029 ◽  
Author(s):  
Jeffrey T. F. Ashley ◽  
David H. Secor ◽  
Erik Zlokovitz ◽  
Samantha Q. Wales ◽  
Joel E. Baker
Keyword(s):  
Habitat Use ◽  
Striped Bass ◽  
Polychlorinated Biphenyl ◽  
Hudson River

Tetrachlorodibenzo--dioxins and tetrachlorodibenzofurans in Atlantic coast striped bass and in selected Hudson River fish, waterfowl and sediments

Chemosphere ◽  
1984 ◽  
Vol 13 (8) ◽  
pp. 849-860 ◽  
Author(s):  
P. O'Keefe ◽  
D. Hilker ◽  
C. Meyer ◽  
K. Aldous ◽  
L. Shane ◽  
...  
Keyword(s):  
Striped Bass ◽  
Atlantic Coast ◽  
Hudson River ◽  
River Fish

Effects of temperature and salinity on survival of young-of-the-year Hudson River striped bass (Morone saxatilis): implications for optimal overwintering habitats

2002 ◽  
Vol 59 (5) ◽  
pp. 787-795 ◽  
Author(s):  
Thomas P Hurst ◽  
David O Conover
Keyword(s):  
Body Size ◽  
Low Temperature ◽  
Striped Bass ◽  
Low Temperatures ◽  
Morone Saxatilis ◽  
Hudson River ◽  
Temperature Tolerance ◽  
Low Temperature Tolerance ◽  
Energetic State ◽  
Young Of The Year

We examined the role of salinity, body size, and energetic state in determining low temperature tolerance of young-of-the-year (YOY) striped bass (Morone saxatilis) and used this information to map optimal overwintering habitat in the Hudson River estuary. A long-term experiment compared survival at 15 ppt and 30 ppt. In additional experiments, winter-acclimated fish were exposed to temperature declines (2.3°C·day–1 to 1°C·week–1) at salinities from 0 ppt to 35 ppt. Highest survival at low temperatures was consistently observed at intermediate salinities. These results suggest that the observed distribution of overwintering striped bass is related to physiological constraints on osmo regulatory ability at low temperatures. Low temperature tolerance appeared unrelated to body size and energetic state. Salinity profiles were used to describe the location and extent of optimal wintering habitats under various hydrographic regimes. The location of optimal habitats was displaced by over 27 km along the river axis because of variation in salinity regime. Changes in the availability of optimal habitat may be responsible for variation in recruitment to the Hudson River population. These results demonstrate the need to consider a holistic approach encompassing all seasons of the year in assessing habitat requirements of fishes.

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