Icthyoplankton of Slope and Gulf Stream Waters off Nova Scotia in late Autumn 1974

Evseenko, S. A.

doi:10.2960/j.v3.a12

Cited by 13 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The distribution of conservative properties, along with the varied, recombinant pattern of taxa at positions within and across the frontal zones, indicated intensive mixing. Larvae of the families Gonostomatidae and Phosichthyidae occurred on both sides of the frontal zone ( Table 2), but are exclusively of mesopelagic, oceanic origin ( Ahlstrom, 1959, 1972; Evseenko, 1982; Röpke, 1993); hence they were chosen as indicators of Gulf Stream‐to‐shelf exchange. The larvae of the clupeid, Brevoortia tyrannus , and the sciaenid, Leiostomus xanthurus , consistently occurred on both sides of the frontal zone ( Table 2), but spawn on the outer continental shelf in or near the Gulf Stream front (see review in Govoni, 1993); hence, these taxa were chosen as indicators of shelf‐to‐Gulf Stream exchange.…”

Section: Resultsmentioning

confidence: 99%

Exchange and flux of larval fishes across the western Gulf Stream front south of Cape Hatteras, USA, in winter

Govoni

Spach

1999

Fisheries Oceanography

View full text Add to dashboard Cite

To describe exchange and to frame the magnitude of the flux of larval fishes across the Gulf Stream front in winter, collections were taken on the inshore and offshore sides of the frontal zone in 1991, 1993, 1994 and 1995, off Onslow Bay, North Carolina. Collections yielded larval fishes representing 75 families. Of these, the larvae of the families Gonostomatidae or Phosichthyidae consistently occurred on both sides of the frontal zone, yet are exclusively of mesopelagic, deep‐oceanic origin; hence, they indicate Gulf Stream‐to‐shelf water‐exchange. The larvae of the clupeid, Brevoortia tyrannus, and the sciaenid, Leiostomus xanthurus, occurred on both sides of the frontal zone, yet spawn on the outer continental shelf in or near the Gulf Stream front; hence these taxa indicate shelf‐to‐Gulf Stream water‐exchange. The mechanisms of exchange, as indicated by the distribution of heat and salt across the front, along with satellite images of sea‐surface temperature, were not completely resolved, largely because of the two‐dimensional (x, z) rather than three‐dimensional (x, y, z) coordination employed. The observed distributions of indicator taxa did not always conform with expected, given the distribution of heat and salt across the front. Parcels of water exchanged across the front upstream (to the south) and encountered during observation along the cross‐shelf transects explains the lack of conformity. Where the expected and observed distributions agreed, the flux was 0.0009 larvae m−1 s−1 for the indicators of Gulf Stream‐to‐shelf exchange, and 0.0007–0.0030 larvae m−1 s−1 for the indicators of shelf‐to‐Gulf Stream exchange.

show abstract

Section: Resultsmentioning

confidence: 99%

Exchange and flux of larval fishes across the western Gulf Stream front south of Cape Hatteras, USA, in winter

Govoni

Spach

1999

Fisheries Oceanography

View full text Add to dashboard Cite

show abstract

“…Frontal waves and small eddies along the shelf/slope front can mix shelf and slope water (Garvine et al, Table 4. Evseenko (1982) collected some of these species in the Slope Sea as well, but in low numbers. Total number of ®sh collected in a study are presented.…”

Section: Mab Shelf Assemblagementioning

confidence: 99%

Springtime ichthyoplankton of the slope region off the north‐eastern United States of America: larval assemblages, relation to hydrography and implications for larval transport

Hare

Fahay

Cowen

2001

Fisheries Oceanography

View full text Add to dashboard Cite

Larval transport in the slope region off north‐eastern North America influences recruitment to juvenile habitats for a variety of fishes that inhabit the continental shelf. In this study, collections of larval fishes were made during springtime over the continental slope to provide insights into larval distributions and transport. Ichthyoplankton composition and distribution mirrored the physical complexity of the region. Three larval fish assemblages were defined, each with different water mass distributions. A Gulf Stream assemblage was found predominantly in the Gulf Stream and associated with filaments of discharged Gulf Stream water in the Slope Sea. Larvae of this assemblage originated from oceanic and shelf regions south of Cape Hatteras. Several members of this assemblage utilize habitats in the Middle Atlantic Bight (MAB) as juveniles (Pomatomus saltatrix, Peprilus triacanthus) and other members of the assemblage may share this life cycle (Mugil curema, Sphyraena borealis, Urophycis regia). A Slope Sea assemblage was found in all water masses, and was composed of epi‐ and mesopelagic fish larvae, as well as larvae of benthic shelf/slope residents. Larvae of one member of this assemblage (U. tenuis) are spawned in the Slope Sea but cross the shelf‐slope front and use nearshore habitats for juvenile nurseries. A MAB shelf assemblage was found in MAB shelf water and was composed of larvae that were spawned on the shelf. Some of these species may cross into the Slope Sea before returning to MAB shelf habitats (e.g. Enchelyopus cimbrius, Glyptocephalus cynoglossus). Previous studies have examined the effect of warm‐core rings on larval distributions, but this study identifies the importance of smaller‐scale features of the MAB shelf/slope front and of filaments associated with Gulf Stream meanders. In combination with these advective processes, the dynamic nature of larval distributions in the Slope Sea appears to be influenced, to varying degrees, by both vertical and horizontal behaviour of larvae and pelagic juveniles themselves.

show abstract

“…Larvae of the bristlemouths (Gonostomatidae), lightfishes (Phosichthyidae), and lanternfishes (Myctophidae) were selected as indicators of fishes spawned off the shelf in the open ocean. The larvae of these fishes are among the most abundant, open-ocean spawned larvae in the western North Atlantic (Evseenko 1982), as well as in western boundary currents (Sassa et al 2004). Stations were classified as location-based designations ( Table 2) and were not linked to water mass, because water masses are often separated vertically in the region; collections were neither depth nor water-mass discrete.…”

Section: Methodsmentioning

confidence: 99%

The Distribution of Larval Fishes of the Charleston Gyre Region off the Southeastern United States in Winter Shaped by Mesoscale, Cyclonic Eddies

2013

View full text Add to dashboard Cite

Serial, cyclonic, mesoscale eddies arise just north of the Charleston Bump, a topographical rise on the continental slope and Blake Plateau, and characterize the U.S. outer shelf and upper slope in the region of the Charleston Gyre. This region was transected during the winters of 2000, 2001, and 2002, and hydrographic data and larval fishes were collected. The hydrodynamics of the cyclonic eddies of the Charleston Gyre shape the distribution of larval fishes by mixing larvae from the outer continental shelf and the Gulf Stream and entraining them into the eddy circulation at the peripheral margins, the wrap‐around filaments. Over all years and transects (those that intercepted eddies and those that did not), chlorophyll a concentrations, zooplankton displacement volumes, and larval fish concentrations were positively correlated. Chlorophyll a concentrations were highest in filaments that wrapped around eddies, and zooplankton displacement volumes were highest in the continental shelf–Gulf Stream–frontal mix. Overall, the concentration of all larval fishes declined from inshore to offshore with highest concentrations occurring over the outer shelf. Collections produced larvae from 91 fish families representing continental shelf and oceanic species. The larvae of shelf‐spawned fishes—Atlantic Menhaden Brevoortia tyrannus, Round Herring Etrumeus teres, Spot Leiostomus xanthurus, and Atlantic Croaker Micropogonias undulatus—were most concentrated over the outer shelf and in the continental shelf–Gulf Stream–frontal mix. The larvae of ocean‐spawned fishes—lanternfishes, bristlemouths, and lightfishes—were more evenly dispersed in low concentrations across the outer shelf and upper slope, the highest typically in the Gulf Stream and Sargasso Sea, except for lightfishes that were highest in the continental shelf–Gulf Stream–frontal mix. Detrended correspondence analysis rendered groups of larval fishes that corresponded with a gradient between the continental shelf and Gulf Stream and Sargasso Sea. Eddies propagate northeastward with a residence time on the outer shelf and upper slope of ∼1 month, the same duration as the larval period of most fishes. The pelagic habitat afforded by eddies and fronts of the Charleston Gyre region can be exploited as nursery areas for feeding and growth of larval fishes within the southeastern Atlantic continental shelf ecosystem of the U.S. Eddies, and the nursery habitat they provide, translocate larvae northeastward.Received March 18, 2013; accepted June 21, 2013

show abstract

Icthyoplankton of Slope and Gulf Stream Waters off Nova Scotia in late Autumn 1974

Cited by 13 publications

References 9 publications

Exchange and flux of larval fishes across the western Gulf Stream front south of Cape Hatteras, USA, in winter

Exchange and flux of larval fishes across the western Gulf Stream front south of Cape Hatteras, USA, in winter

Springtime ichthyoplankton of the slope region off the north‐eastern United States of America: larval assemblages, relation to hydrography and implications for larval transport

The Distribution of Larval Fishes of the Charleston Gyre Region off the Southeastern United States in Winter Shaped by Mesoscale, Cyclonic Eddies

Contact Info

Product

Resources

About