Taxonomic variability and criteria for distinguishing metamorphosing larval and juvenile stages of Limanda ferruginea and Hippoglossoides platessoides (Pisces: Pleuronectidae) from the Scotian Shelf

1980 ◽  
Vol 58 (2) ◽  
pp. 202-206 ◽  
Author(s):  
Louis Van Guelpen
Keyword(s):  
Stage Iv ◽  
Diagnostic Value ◽  
Scotian Shelf ◽  
Anal Spine ◽  
Limanda Ferruginea ◽  
Size At Metamorphosis ◽  
Fin Rays ◽  
Juvenile Stages ◽  
Gut Pigment ◽  
Hippoglossoides Platessoides

Metamorphosing larval and juvenile Limanda ferruginea and Hippoglossoides platessoides from the Scotian Shelf were examined to characterize their taxonomic variability and to establish the reliability of criteria for their identification. The species were found to be separable using several characters. Limanda ferruginea had 11 to 12 precaudal and 41 to 44 total vertebrae, 38 to 41 total myomeres, 51 to 67 anal fin rays and usually metamorphosed at less than 16 mm standard length (SL). Hippoglossoides platessoides had 13 to 14 precaudal and 45 to 48 total vertebrae, 44 to 47 total myomeres, 62 to 76 anal fin rays, and usually metamorphosed at greater than 25 mm SL. Anal fin ray counts and size at metamorphosis were of limited diagnostic value only. In addition, stage IV L. ferruginea usually had dark gut pigment and a visible modified first anal pterygiophore (anal spine), whereas H. platessoides had light gut pigment and no visible anal spine. Dark gut pigment also was diagnostic for juvenile L. ferruginea still possessing this character.

Eggs and Larvae of Northern Sand Lance (Ammodytes dubius) from the Scotian Shelf

1972 ◽  
Vol 29 (12) ◽  
pp. 1667-1671 ◽  
Author(s):  
J. S. Scott
Keyword(s):  
Growth Rates ◽  
Scotian Shelf ◽  
Sand Lance ◽  
Yellowtail Flounder ◽  
Limanda Ferruginea ◽  
Dorsal Fin ◽  
The North ◽  
Mean Diameter ◽  
Fin Rays ◽  
Eggs And Larvae

Eggs from stomachs of yellowtail flounder (Limanda ferruginea) from Emerald Bank, south of Nova Scotia, were identified as those of northern sand lance, Ammodytes dubius. They were larger than those of other Ammodytes species, with a mean diameter of 1.05 mm. Ovarian eggs from ripe A. dubius were smaller (mean diameter 0.7 mm) with a unimodal distribution of egg diameters, indicating a single spawning each season.Larvae were widespread and abundant on the Scotian Shelf from February to April. They hatched at about 4-mm length and grew to about 25-mm length between February and May on Emerald Bank. Growth rates decreased to the north. Numbers and distribution of melanophores changed with larval length, but showed no differences in number at given length between geographical areas. Change in numbers of anal, caudal, and dorsal fin rays followed a pattern similar to that of corresponding melanophores.

Digenean parasite communities in flatfishes of the Scotian Shelf and southern Gulf of St. Lawrence

1982 ◽  
Vol 60 (11) ◽  
pp. 2804-2811 ◽  
Author(s):  
J. S. Scott
Keyword(s):  
Feeding Behavior ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Parasite Prevalence ◽  
Winter Flounder ◽  
Fish Length ◽  
Pseudopleuronectes Americanus ◽  
Scotian Shelf ◽  
Yellowtail Flounder ◽  
Limanda Ferruginea

Prevalence of digenean parasites in four major flatfishes of the Scotian Shelf and southern Gulf of St. Lawrence, American plaice (Hippoglossoides platessoides), yellowtail flounder (Limanda ferruginea), witch flounder (Glyptocephalus cynoglossus), and winter flounder (Pseudopleuronectes americanus), is compared between hosts in relation to geographic distribution, season, feeding behavior, and fish length. The 13 parasite species indicate overlap of feeding habits among hosts but also considerable diversity in feeding behavior, supporting the evidence from examination of stomach contents. Prevalence of digeneans in different final hosts varied between geographic areas and may be used to characterize the populations of the comparatively sedentary flatfish populations. Seasonal variation in prevalence was consistent from area to area but differed between parasites, from the expected increase in summer in some, concomitant with increased feeding, to a winter increase in others, probably related to a seasonal change of diet. Fish length had little effect on parasite prevalence in yellowtail flounder and witch flounder but had a notable effect on plaice and winter flounder from the Gulf of St. Lawrence, again apparently related to change of diet.

scholarly journals HIGH SENSITIVITY TROPONIN HAS NO DIAGNOSTIC VALUE FOR MYOCARDIAL INFARCTION IN STAGE IV-V OF RENAL INSUFFICIENCY

2014 ◽  
Vol 63 (12) ◽  
pp. A118
Author(s):  
Luigi M. Biasucci ◽  
Massimo Gustapane ◽  
Gina Biasillo ◽  
Maria Teresa Cardillo ◽  
Maria Giulia Marini ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Renal Insufficiency ◽  
Stage Iv ◽  
High Sensitivity ◽  
Diagnostic Value ◽  
High Sensitivity Troponin

Larval Flatfish Distributions and Drift on the Southern Grand Bank

1992 ◽  
Vol 49 (3) ◽  
pp. 467-483 ◽  
Author(s):  
Kenneth T. Frank ◽  
John W. Loder ◽  
James E. Carscadden ◽  
William C Leggett ◽  
Christopher T. Taggart
Keyword(s):  
Growth Rate ◽  
Thermocline Depth ◽  
Length Frequency ◽  
Frequency Distributions ◽  
Yellowtail Flounder ◽  
Limanda Ferruginea ◽  
Larval Drift ◽  
Vertical Distributions ◽  
Hippoglossoides Platessoides ◽  
Rule Out

Ichthyoplankton and hydrographic surveys of the southern Grand Bank in September of 1986, 1987, and 1988 revealed substantial correspondence between the areal distributions of larvae of three flatfish species and temperature below the thermocline. Depth-averaged densities of American plaice (Hippoglossoides platessoides) were negatively correlated with temperature whereas yellowtail flounder (Limanda ferruginea) and witch flounder (Glyptocephalus cynoghssus) densities were positively correlated with temperature. In spite of large interannual differences in abundance, the larval distributions showed similar structure from year to year. Using estimates of larval age inferred from length frequency distributions and literature values for growth rate, in conjunction with moored current measurements, estimates of spawning times and locations were obtained for each species. These estimates were compared with historical information on the distribution of prespawning fish for each species to examine the hypothesis of passive larval drift. The results indicate that in most, but not all cases, the larval distributions and currents are consistent with passive larval drift for particular growth rates and vertical distributions. However, the observations are not adequate to rule out alternative mechanisms involving behaviour.

THE METAZOAN PARASITES OF THE HETEROSOMATA OF THE GULF OF ST. LAWRENCE: VI. DIGENEA

1960 ◽  
Vol 38 (5) ◽  
pp. 923-937 ◽  
Author(s):  
Keith Ronald
Keyword(s):  
Pseudopleuronectes Americanus ◽  
Metazoan Parasites ◽  
Hippoglossus Hippoglossus ◽  
Limanda Ferruginea ◽  
Host Distribution ◽  
Hippoglossoides Platessoides

Aporocotyle simplex, Brachyphallus crenatus, Cryptocotyle lingua, Derogenes varicus, Genolinea laticauda, Gonocerca crassa, Hemiuris appendiculatus, H. communis, H. levinseni, Hemiuris sp., Lepidapedon rachion, Otodistomum veliporum, Peracreadium commune, Plagioporus varia, Podocotyle atomon, P. olssoni, Prosorhynchus squamatus, Steganoderma (Steganoderma) formosum, Stenakron vetustum, Stephanostomum baccatum, Steringophorus furciger, Steringotrema cluthense, and S. pagelli were identified in a study of 560 specimens of Heterosomata (Hippoglossoides platessoides, Hippoglossus hippoglossus, Limanda ferruginea, Liopsetta putnami, Pseudopleuronectes americanus, and Scophthalmus aquosus) from the Gulf of St. Lawrence area. Host distribution is indicated, together with parasitic incidence.

Incidence of Trematode Parasites of American Plaice (Hippoglossoides platessoides) of the Scotian Shelf and Gulf of St. Lawrence in Relation to Fish Length and Food

1975 ◽  
Vol 32 (4) ◽  
pp. 479-483 ◽  
Author(s):  
J. S. Scott
Keyword(s):  
Alimentary Tract ◽  
Sea Urchins ◽  
Trematode Species ◽  
Fish Length ◽  
Intermediate Hosts ◽  
Scotian Shelf ◽  
Food Items ◽  
Digenetic Trematodes ◽  
Hippoglossoides Platessoides ◽  
Trematode Parasites

The following digenetic trematodes were found in the alimentary tract of American plaice (Hippoglossoides platessoides) from the Scotian Shelf and Gulf of St. Lawrence: Derogenes varicus, Fellodistomum furcigerum, Lecithaster gibbosus, Stenakron vetustum, Steringotrema ovacutum, Zoogonoides viviparus, Hemiurus levinseni, Otodistomum veliporum (larvae), Podocotyle atomon, Prosorhyncus squamatus.The incidence of several trematode species changed with length of fish and associated changes in the fish’s diet. Incidence of D. varicus and S. vetustum decreased with increase of host length, whereas incidence of R. ovacutum and Z. viviparus increased. Lecithaster gibbosus and S. furciger showed little change in incidence. Correlations between parasite incidence and frequency of occurrence of food items indicated that small crustaceans may be intermediate hosts for S. vetustum and D. varicus; sea urchins may be intermediate hosts for R. ovacutum and brittle stars for Z. viviparus.

Stock Structure of Scotian Shelf Flatfish as Inferred from Ichthyoplankton Survey Data and the Geographic Distribution of Mature Females

1988 ◽  
Vol 45 (10) ◽  
pp. 1674-1685 ◽  
Author(s):  
J. D. Neilson ◽  
E. M. DeBlois ◽  
P. C. F. Hurley
Keyword(s):  
Stock Assessment ◽  
Stock Structure ◽  
Stock Identification ◽  
Scotian Shelf ◽  
Yellowtail Flounder ◽  
Limanda Ferruginea ◽  
Valuable Adjunct ◽  
Commercially Important ◽  
Eggs And Larvae ◽  
Sexually Mature

Data on egg distributions and timing of appearance of maximum egg densities were examined to determine the stock structure of three commercially important flatfish occurring on the Scotian Shelf: American plaice (Hippoglossoides platessoides), yellowtail flounder (Limanda ferruginea), and witch flounder (Glyptocephalus cynoglossus). Distributions of sexually mature females obtained from research vessel surveys were used to further support inferences concerning spawning location. Using such information, more than one stock of both American plaice and yellowtail flounder appear to occur on the Scotian Shelf, but no conclusions could be drawn concerning witch flounder. In the case of American plaice and yellowtail flounder, the existing means of geographic aggregation of data for stock assessment purposes do not appear to adequately represent stock structure. Little or no advection of eggs and larvae appears to occur on the Scotian Shelf, supporting the hypothesis that current-driven retention areas promote stock discreteness in that region. It was concluded that ichthyoplankton surveys can be a valuable adjunct to more traditional means of stock identification.

The diagnostic value of multimodality MRI in endometrial carcinoma staging

2016 ◽  
Vol 58 (5) ◽  
pp. 609-616 ◽  
Author(s):  
Lixin Du ◽  
Yongqiang Yu ◽  
Yuli Wang ◽  
Jun Xia ◽  
Xixiong Qiu ◽  
...  
Keyword(s):  
Endometrial Carcinoma ◽  
Stage Iv ◽  
Staging System ◽  
Diagnostic Value ◽  
Clinical Staging ◽  
Prognostic Assessment ◽  
Imaging Tool ◽  
Mri Staging ◽  
Gynecology And Obstetrics ◽  
Staging Accuracy

Background Multimodality magnetic resonance imaging (MRI) is an imaging technology that is used to integrate the structural and functional information of lesions. MRI can determine the staging of endometrial carcinoma, provide guidance for selection of surgical treatment and postoperative prognostic assessment, and has an important role in improving the survival of patients with endometrial carcinoma. Purpose To evaluate multimodality MRI staging accuracy for endometrial carcinoma based on the International Federation of Gynecology and Obstetrics (FIGO 2009) staging system. Material and Methods This is a retrospective study of the complete clinical and surgical pathology data from 83 patients with endometrial carcinoma treated between June 2011 and August 2015. Using a blind design, the preoperative clinical staging according to the current FIGO2009 MRI-based staging for each endometrial carcinoma was analyzed and corrected by postoperative histopathological results, which served as the staging standard. The role of multimodality MRI on clinical staging accuracy for endometrial carcinoma was studied. Results Based on the pathological evaluation after surgery, the 83 endometrial carcinoma patients were staged according to the current FIGO2009 staging criteria as: stage I, n = 56; stage II, n = 17; stage III, n = 7; and stage IV, n = 3. The multimodality MRI staging accuracy for endometrial carcinoma stages I–IV by FIGO2009 were 91.6% (76/83), 91.6% (76/83), 92.8% (77/83), and 97.6% (81/83), respectively. Conclusion Multimodality MRI is an important imaging tool in the pre-operative clinical staging of endometrial carcinoma. The current FIGO staging system appears to be a concise, reasonable, and practical set of criteria for the clinical management of endometrial carcinoma.

Geographic Variation in Incidence of Trematode Parasites of American Plaice (Hippoglossoides platessoides) in the Northwest Atlantic

1975 ◽  
Vol 32 (4) ◽  
pp. 547-550 ◽  
Author(s):  
J. S. Scott
Keyword(s):  
Geographic Variation ◽  
Gulf Of Maine ◽  
Biological Indicators ◽  
Scotian Shelf ◽  
Northwest Atlantic ◽  
Digenetic Trematodes ◽  
Hippoglossoides Platessoides ◽  
Trematode Parasites

The digenetic trematodes Steringotrema ovacutum, Zoogonoides viciparus, Derogenes varicus, Lecithaster gihbosus, Fellodistomum furcigerum, and Stenakron vetustum were common in American plaice (Hippoglossoides platessoides) from the southern Gulf of St. Lawrence, Scotian Shelf, and northeast Gulf of Maine in the summers of 1971 and 1972. Levels of incidence of the trematodes in different areas within the region are compared. Steringotrema ovacutum, Z. viviparus, and F. furcigerum may be useful as biological indicators in plaice in the Northwest Atlantic.

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