Liver Lesions in Winter Flounder (Pseudopleuronectes americanus) from Jamaica Bay, New York: Indications of Environmental Degradation

Estuaries ◽  
1994 ◽  
Vol 17 (1) ◽  
pp. 172 ◽  
Author(s):  
Thomas P. Augspurger ◽  
Roger L. Herman ◽  
John T. Tanacred ◽  
Jeff S. Hatfield
Keyword(s):  
New York ◽  
Environmental Degradation ◽  
Winter Flounder ◽  
Liver Lesions ◽  
Pseudopleuronectes Americanus ◽  
Jamaica Bay

scholarly journals Migration diversity, spawning behavior, and habitat utilization of winter flounder

2019 ◽  
Vol 76 (9) ◽  
pp. 1503-1514 ◽  
Author(s):  
Catherine M. Ziegler ◽  
Joshua P. Zacharias ◽  
Michael G. Frisk
Keyword(s):  
New York ◽  
Lunar Cycle ◽  
Population Diversity ◽  
Winter Flounder ◽  
Spawning Behavior ◽  
Pseudopleuronectes Americanus ◽  
Homing Behavior ◽  
Species Dynamics ◽  
Summer Temperatures ◽  
The Mean

Winter flounder (Pseudopleuronectes americanus) have declined to less than 11% of their historical abundance in offshore areas and have experienced severe declines and inbreeding in coastal subpopulations. Understanding metapopulation structure and disparate migratory behavior is vital to understanding the species’ dynamics. We used acoustic telemetry to evaluate migratory types, homing behavior, and spawning behavior in adult winter flounder (n = 72) in Mattituck Creek, New York. Telemetry results showed that 17% of the tagged individuals displayed resident behavior and remained in the creek year-round despite mean summer temperatures reaching 28 °C. Alternatively, the migratory group (∼83%) started to leave the system when the mean water temperature reached 12 °C. A dominant driver of migration was not indicated; instead, migration out of or into the creek appeared complex and related to date, temperature, lunar cycle, photoperiod, and year. Approximate spawning was estimated to occur as early as November and continued through April based on aggregative behaviors of adults and back-calculations of dates using young-of-the-year otoliths. Our results support the emerging view that winter flounder’s dynamics reflect local life history and population diversity, which are currently unaccounted for in management.

The incidence of Glugea stephani (Protozoa: Microsporida) in winter flounder, Pseudopleuronectes americanus, from the New York – New Jersey Lower Bay Complex and factors influencing it

1991 ◽  
Vol 69 (2) ◽  
pp. 317-321 ◽  
Author(s):  
Ann Cali ◽  
Peter M. Takvorian
Keyword(s):  
New York ◽  
New Jersey ◽  
Water Temperature ◽  
Environmental Changes ◽  
Winter Flounder ◽  
Fish Length ◽  
Pseudopleuronectes Americanus ◽  
Spawning Behaviour ◽  
Seasonal Basis ◽  
Host Parasite

The microsporidium Glugea stephani is endemic in winter flounder from the New york – New Jersey area. The prevalence of infection fluctuates with water temperature on a seasonal basis, increasing in summer and decreasing in winter. From March 1981 through December 1983, 32 monthly collections were conducted. During this period 4002 winter flounder were caught and examined, 301 (7.5%) of which were infected. Data collected during the study indicated that although several factors may influence the host–parasite interaction, only water temperature changes could be statistically correlated with G. stephani infection in this winter flounder population. In an effort to determine what factors other than temperature affect prevalence of infection, fish length, sex, diet, and spawning behaviour were examined. Although these factors do not, at first, appear to influence infectivity, stress imposed on the host by physiological and environmental changes may be significant. Our results are compared with those from G. stephani in its type host, the European flounder Platichthys flesus.

Ultrastructure of vacuolated cells in the liver of rock sole and winter flounder living in contaminated environments

1990 ◽  
Vol 48 (3) ◽  
pp. 522-523
Author(s):  
Carla Stehr
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Puget Sound ◽  
Light And Electron Microscopy ◽  
Similar Type ◽  
Winter Flounder ◽  
Boston Harbor ◽  
Liver Lesions ◽  
Pseudopleuronectes Americanus ◽  
Vacuolated Cells

Focal and diffuse areas of nonneoplastic vacuolated cells in the liver have been observed with light microscopy in up to 12% of the demersal rock sole (Lepidopsetta bilineata) inhabiting Eagle Harbor, which is a contaminated bay in Puget Sound. A similar type of liver vacuolation has also been observed at higher prevalences in winter flounder (Pseudopleuronectes americanus) inhabiting contaminated areas of Boston Harbor. This paper compares the ultrastructure of vacuolated liver lesions in feral rock sole with that of winter flounder from contaminated areas of Puget Sound and Boston Harbor, respectively.Rock sole from Eagle Harbor, Puget Sound, and winter flounder from Boston Harbor, were collected by bottom trawl from NOAA research vessels. Fish were killed and immediately necropsied. Adjacent pieces of tissue were collected for light and electron microscopy from grossly visible liver lesions or from the center of the liver. Samples collected for histology were fixed in Dietrich's solution, embedded in paraffin and stained with H&E.

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