Population Structure of Summer Flounder Between New York and Florida Based on Linear Discriminant Analysis

Wilk, Stuart J.; Smith, W.; Ralph, Daniel; Sibunka, John D.

doi:10.1577/1548-8659(1980)109<265:psosfb>2.0.co;2

Cited by 22 publications

(9 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cape Hatteras is considered an important zoogeographic boundary (Briggs 1974). For Summer Flounder Paralichthys dentatus, Wilk et al (1980) documented meristic and morphological differences between northern and southern populations, whereas Jones and Quattro (1999) failed to find any significant genetic population structure based on the Cape Hatteras boundary. Genetic studies of Weakfish Cynoscion regalis, Bluefish Pomatomus saltatrix, and sea catfishes (Ariidae) failed to find significant genetic divergence between the northern and southern populations as well (Avise et al 1987;Graves et al 1992aGraves et al , 1992b.…”

Section: Discussionmentioning

confidence: 92%

Genetic Population Structure of Black Drum in U.S. Waters

Leidig

Shervette

McDonough

et al. 2015

N American J Fish Manag

View full text Add to dashboard Cite

The Black Drum Pogonias cromis is an estuarine-dependent fish that supports recreational and commercial fisheries throughout its range along the U.S. Atlantic coast and Gulf of Mexico (GOM) coast. We used nuclear microsatellite markers and samples collected from multiple locations along both the U.S. Atlantic and GOM coasts to evaluate the stock structure of Black Drum and to examine small-scale spatial genetic population structure along the U.S. Atlantic coast. As no microsatellite primers had been developed for Black Drum, primers for Spotted Seatrout Cynoscion nebulosus and Red Drum Sciaenops ocellatus were screened, selected, and optimized for use with Black Drum DNA. Six polymorphic loci were identified and used to genotype samples. Results suggested (1) significant genetic divergence between Black Drum populations from the U.S. Atlantic coast and the GOM coast; and (2) either recent or current gene flow between the two regions. Along the U.S. Atlantic coast, there appeared to be weak but significant genetic divergence among Black Drum from southern states, specifically between individuals from the Carolinas and Florida. An isolation-by-distance pattern was also observed for Black Drum from North Carolina to Florida. On a larger scale, results suggested a lack of genetic divergence between individuals from Delaware and Virginia and those from the southern Atlantic states, which may be attributable to the life history patterns of Black Drum. Our results support the management of Black Drum in U.S. waters as two separate stocks: Atlantic and GOM. The results also support the management of Black Drum along the U.S. Atlantic coast as a single unified stock and indicate the need for common management regulations among the Atlantic states.

show abstract

Section: Discussionmentioning

confidence: 92%

Genetic Population Structure of Black Drum in U.S. Waters

Leidig

Shervette

McDonough

et al. 2015

N American J Fish Manag

View full text Add to dashboard Cite

show abstract

“…Hatteras, a known biogeographical break for a variety of other invertebrates and fish (Baker et al, 2008;Briggs, 1974;Roy et al, 2012), and a purported barrier for summer flounder (Kraus & Musick, 2001;Wilk et al, 1980). However, we found larval dispersal to be bidirectional across Cape Hatteras, suggesting that Cape Hatteras does not function as a strong biogeographical barrier to movement for summer flounder larvae.…”

Section: Dispersal Across Biogeographical Breaksmentioning

confidence: 50%

“…One species with a distribution straddling Cape Hatteras and that is thought to experience limited dispersal across Cape Hatteras (Kraus & Musick, 2001; Wilk, Smith, Ralph, & Sibunka, 1980) is summer flounder ( Paralichthys dentatus ). The directionality and magnitude of larval summer flounder dispersal remains unknown.…”

Section: Introductionmentioning

confidence: 99%

Using multiple natural tags provides evidence for extensive larval dispersal across space and through time in summer flounder

et al. 2020

View full text Add to dashboard Cite

Dispersal sets the fundamental scales of ecological and evolutionary dynamics and has important implications for population persistence. Patterns of marine dispersal remain poorly understood, partly because dispersal may vary through time and often homogenizes allele frequencies. However, combining multiple types of natural tags can provide more precise dispersal estimates, and biological collections can help to reconstruct dispersal patterns through time. We used single nucleotide polymorphism genotypes and otolith core microchemistry from archived collections of larval summer flounder (Paralichthys dentatus, n = 411) captured between 1989 and 2012 at five locations along the US East coast to reconstruct dispersal patterns through time. Neither genotypes nor otolith microchemistry alone were sufficient to identify the source of larval fish. However, microchemistry identified clusters of larvae (n = 3-33 larvae per cluster) that originated in the same location, and genetic assignment of clusters could be made with substantially more confidence. We found that most larvae probably originated near a biogeographical break (Cape Hatteras) and that larvae were transported in both directions across this break. Larval sources did not shift north through time, despite the northward shift of adult populations in recent decades. Our novel approach demonstrates that summer flounder dispersal is widespread throughout their range, on both intra-and intergenerational timescales, and may be a particularly important process for synchronizing population dynamics and maintaining genetic diversity during an era of rapid environmental change. Broadly, our results reveal the value of archived collections and of combining multiple natural tags to understand the magnitude and directionality of dispersal in species with extensive gene flow.

show abstract

“…For example, certain flounder species, such as the summer flounder, will time their spawn with the MAB fall transition. Adults two or more years old spawn as they migrate in September through November (Wilk et al, 1980). Their larvae are neutrally buoyant and adrift at the surface for 30 days.…”

Section: Oceanographic and Ecological Implicationsmentioning

confidence: 99%

Annual and Seasonal Surface Circulation over the Mid Atlantic Bight Continental Shelf Derived from a Decade of High Frequency Radar Observations

Roarty

Glenn

Brodie

et al. 2020

Preprint

View full text Add to dashboard Cite

A decade (2007-2016) of hourly 6-km-resolution maps of the surface currents across the Mid-Atlantic Bight (MAB) generated by a regional-scale High Frequency Radar network are used to reveal new insights into the spatial patterns of the annual and seasonal mean surface flows. Across the 10-year time series, temporal means and interannual and intra-annual variability are used to quantify the variability of spatial surface current patterns. The 10-year annual mean surface flows are weaker and mostly cross-shelf near the coast, increasing in speed and rotating to more alongshore directions near the shelfbreak, and increasing in speed and rotating to flow off-shelf in the southern MAB. The annual mean surface current pattern is relatively stable year to year compared to the hourly variations within a year. The 10-year seasonal means exhibit similar current patterns, with winter and summer more cross-shore while spring and fall transitions are more alongshore. Fall and winter mean speeds are larger and correspond to when mean winds are stronger and cross-shore. Summer mean currents are weakest and correspond to a time when the mean wind opposes the alongshore flow. Again, intra-annual variability is much greater than interannual, with the fall season exhibiting the most interseasonal variability in the surface current patterns. The extreme fall seasons of 2009 and 2011 are related to extremes in the wind and river discharge events caused by different persistent synoptic meteorological conditions, resulting in more or less rapid fall transitions from stratified summer to well-mixed winter conditions. Plain Language Summary A coordinated High Frequency Radar network operated between Cape Cod, MA, and Cape Hatteras, NC, generates hourly maps of ocean surface currents. A decade-long study revealed the detailed structure of the surface flows. These flows were compared to wind and river flow data to explain the patterns observed in the flow. Near the coast, the average currents flow offshore. Away from the coast, the average currents flow along the coast toward the south. Fall is the season with the most variability from year to year. Its higher variability can be traced to different regional weather patterns that change the wind fields and the amount of freshwater delivered by the rivers to the coastal ocean. This is the first study to use a decade of observed surface current maps that uniquely and simultaneously observe the changing patterns of the average flow structure along a segment of eastern United States. The improved understanding of the coastal circulation over a wide area, and what drives its variability, has implications for pollutant transport, plankton transport at the base of the food chain, fish and shellfish reproduction, and multiple ocean-based human activities including fishing, marine transportation, and offshore wind energy development.

show abstract

Population Structure of Summer Flounder Between New York and Florida Based on Linear Discriminant Analysis

Cited by 22 publications

References 0 publications

Genetic Population Structure of Black Drum in U.S. Waters

Genetic Population Structure of Black Drum in U.S. Waters

Using multiple natural tags provides evidence for extensive larval dispersal across space and through time in summer flounder

Annual and Seasonal Surface Circulation over the Mid Atlantic Bight Continental Shelf Derived from a Decade of High Frequency Radar Observations

Contact Info

Product

Resources

About