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1

Parasite fauna of flounder, Platichthys flesus [L.] from the Pomeranian Bay, Southwestern Baltic Sea

100%
Korlatowicz A., Piasecki W.
Wiadomości Parazytologiczne. Suplement
|
2001
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tom 47
|
nr 2
2

Morphometry of flounder Platichthys flesus [L.,1758] from the Gulf of Gdansk [Southern Baltic]

86%
Antoszek A., Krzykawski S.
Acta Scientiarum Polonorum. Piscaria
|
2005
|
tom 04
|
nr 1-2
3

Morphometry and growth rate of the flounder Platichthys flesus [L., 1758] from the Slupsk Furrow [Southern Baltic]

86%
Antoszek A., Krzykawski S.
Acta Scientiarum Polonorum. Piscaria
|
2004
|
tom 03
|
nr 1-2
4

Equations describing changes of shape along the flatfish body length and their importance for sustainable and responsible fisheries

72%
Balejko J., Miler K., Nowakowski P.
Acta Ichthyologica et Piscatoria
|
2007
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tom 37
|
nr 2
Background. The purpose of this study was to identify mathematical equations describing changes in a flatfish body shape along its longitudinal axis. The initial function for the description of a cross-section contour is the ellipse equation including a factor deforming the symmetry with respect to one of axes. Such equations may find their use in fisheries engineering and food-fish processing. Materials and Methods. The morphometric examination of the fish raw material was carried out in order to check whether the proposed function meets expectations and draws a curve. The model fish species used was flounder, Platichthys flesus (L.). Results. The mathematical equation describing changes in a cross-section contour of flatfish body shape along its longitudinal axis. The high value of correlation coefficients (r > 0.99) showed that a hypothetical curve matches experiment results quite well. The equation describing the shape of a flatfish body cross-section contour can be defined by means of the ellipse equation including a factor deforming the symmetry with regard to one of its axes. The function represented by equation (8) draws a curve that follows the contour of the fish cross-section. Conclusion. The shape of flounder, defined in the presently reported study may have importance for sustainable and responsible fisheries, helping to design more selective fishing gear. It can also be used in food-fish engineering for designing more effective fish-processing machinery.
5

Biomorphometry and growth rate of the flounder Platichthys flesus [L., 1758] from the Pomeranian Bay area

72%
Antoszek A., Krzykawski S.
Acta Scientiarum Polonorum. Piscaria
|
2003
|
tom 02
|
nr 1
6

Preliminary results of AChE and GST measurements in flounder Platichthys flesus from the Southern Baltic Sea

72%
Napierska D., Podolska M.
Bulletin of the Sea Fisheries Institute
|
2003
|
nr 2
7

Redescription of Brasilochondria riograndensis [Copepoda, Chondracanthidae] parasitc on flounder, Paralichthys orbignyanus [Actinopterygii, Pleuronectiformes] from South American Atlantic waters

72%
Braicovich P. E., Alarcos A. J.
Acta Parasitologica
|
2007
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tom 52
|
nr 3
Brasilochondria riograndensis Thatcher et Pereira, 2004 (Copepoda, Chondracanthidae) is redescribed based on newly collected material from the branchial cavity of flounder, Paralichthys orbignyanus (Valenciennes, 1842), from the coasts of Buenos Aires Province, Argentina. A number of details were overlooked and some appendages were misidentified in original description and are included herein. These are: the distribution and the number of setae and spines in the antennule, the armature and segmentation of mandible, maxillule, maxilla, and maxilliped, pedigerous segments and genitoabdomen, in both, females and males. Moreover, the geographical distribution of this parasite species is broadened.
8

Sex and age of flounder Platichthys flesus [L.] and parasitic infection in the Gulf of Gdansk

72%
Chibani M., Kijewska A., Rokicki J.
Oceanological and Hydrobiological Studies
|
2005
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tom 34
|
nr 3
9

Assessment of the health state of fish of the southern Baltic; observations of externally visible symptoms of diseases

72%
Kosior M., Grygiel W., Kuczynski J., Radtke K., Wyszynski M.
Bulletin of the Sea Fisheries Institute
|
1997
|
nr 3
10

Seasonal occurrence of parasites of flounder Platichthys flesus [L.] from the Gulf of Gdansk

72%
Chibani M., Rokicki J.
Oceanological and Hydrobiological Studies
|
2004
|
tom 33
|
nr 3
11

Trophic interactions between preadult and adult Pomatoschistus minutus and Pomatoschistus microps and young Platichthys flesus occurring in inshore waters of the Gulf of Gdansk (Southern Baltic)

58%
Zloch I., Sapota M. R.
Oceanological and Hydrobiological Studies
|
2010
|
tom 39
|
nr 2
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Relationship between biomarker responses and contaminant concentration in selected tissues of flounder (Platichthys flesus) from the Polish coastal area of the Baltic Sea

58%
Napierska D., Podolska M.
Oceanologia
|
2008
|
tom 50
|
nr 3
421-442
Previous studies in the Gulf of Gdańsk discussed the responses of selected enzymatic biomarkers to the contaminant gradient in fish and mussels. In the present study, flounder muscle and liver tissues were analyzed for polychlorinated biphenyls (PCB congeners: 28, 52, 101, 118, 138, 153 and 180), organochlorine pesticides (HCHs, HCB and DDTs), and trace metals (Pb, Cd, Zn, Cu, Hg, Cr). An attempt was made to identify the relationship between the measured enzymatic biomarker responses (cholinesterases, malic enzyme, isocitrate dehydrogenase, glutathione S-transferase) and contaminant concentrations in selected flounder tissues. The observed differences in enzymatic biomarker levels suggest that chronic exposure to low-concentration mixtures of contaminants may be occurring in the studied area. However, no conclusive evidence was found of a clear link between the biomarker responses and contaminant concentrations in flounder tissues.
13

Status of exploited Baltic flounder stocks in the Southern Baltic area [ICES SD 26]

58%
Draganik B., Ivanow S., Tomczak M., Maksimov B. Y., Psuty-Lipska I.
Oceanological and Hydrobiological Studies
|
2007
|
tom 36
|
nr 4
47-64
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

AChE levels in mussels and fish collected off Lithuania and Poland (Southern Baltic)

58%
Kopecka J., Rybakowas A., Barsiene J., Pempkowiak J.
Oceanologia
|
2004
|
tom 46
|
nr 3
AChE activities were measured in blue mussels gills and flounder muscles samples collected off Poland – the Gulf of Gdańsk (4 sampling stations) and off Lithuania – the Klajp˙eda area (3 sampling stations), in 2001 (June and October) and 2002 (April and October). The AChE activities [nmol min−1 mg protein−1] were in the range: 15–38 (in blue mussels) and 94–315 (in flounder), and agreed well with those reported for flounder in other coastal Baltic areas, and other European seas. Sources of contaminants in the study area are rather localized in the Gulf of Gdańsk, (mouth of the Vistula due to runoff, ports, sewage discharges), while an accidental oil spill occurred off Lithuania, in the course of the study (November 2001). Geographical and temporal AChE levels changes followed the contamination pattern. AChE activities and gradients in the study area are well documented and confirmed in this study. The study confirms the potential use of AChE as biomarker of organic pollution.
15

Spatial and temporal distribution of flounder fished in the Southern Baltic. Analysis of the catch records from Polish cutter logbooks

58%
Draganik B., Psuty-Lipska I.
Bulletin of the Sea Fisheries Institute
|
2002
|
nr 3
16

An attempt to determine the intermediate host for Pomphorhynchus laevis [Acanthocephala] in the Baltic Sea

58%
Ziolkowska M., Rokicki J.
Acta Ichthyologica et Piscatoria
|
2003
|
tom 33
|
nr 1
Background. A number of fish species in the Baltic Sea are known as definitive hosts for Pomphorhynchus laevis but it is unclear which of the Gammarus species is the intermediate host of this parasite. The aim of the present paper was to identify this host in brackish waters of the Baltic Sea. Materials and Methods. A total of 531 scuds (G. salinus, G. zaddachi, and G. duebeni) were collected from the Gulf of Gdańsk and the Pomeranian Bay, respectively to determine the infection rate of those amphipods in the natural environment. Under experimental condition the scuds were exposed to infection with P. laevis in two different arrangements. In treatment one, the amphipods were kept, from May to July, in the same tank with infected flounder. In treatment two, 197 scuds were exposed to eggs of P. laevis, taken from dissected female acanthocephalans. Results. Scuds sampled from two areas of the Baltic Sea were not infected with P. laevis. Out of three Gammarus species cohabiting with infected flounders only G. zaddachi became infected. None of the scuds exposed directly to the eggs of the parasites became intermediate host of the acanthocephalan studied. Conclusion. span class="ita">Gammarus zaddachi is probably an intermediate host for Pomphorhynchus laevis in the Baltic Sea.
17

Growth pattern of flounder, Platichthys flesus [L.] from the Gulf of Gdansk [Southern Baltic Sea]

58%
Antoszek A., Krzykawski S.
Acta Ichthyologica et Piscatoria
|
2005
|
tom 35
|
nr 1
Background. It is a common perception that growth rates of many commercially-exploited fish species have been well known. It is evident, however, that in certain cases, especially in brackish water environments those growth rates may be diversified. Therefore, determination of growth patterns of various stocks of the same fish, living in different salinity regimes may be important for efficient fisheries management, especially fish-quotas negotiations. The aim of the presently reported study was to estimate the growth rates of length and weight of flounder Platichthys flesus (L.) from the Gulf of Gdańsk and to compare them with those from the Pomeranian Bay and Słupsk Furrow areas. Materials and Methods. A total of 200 fish, collected in the coastal waters of Hel in 1997, was analysed. The fish were caught using flatfish gill nets. The age of flounder was determined from otoliths, whereas measurements of the annual ring increments were made using a dissecting microscope with reflected light over a dark background. The microscope was outfitted with a camera and linked to computer. The images were processed using an image-processing software “Multiscan”. The method of Vovk was employed to study the growth rate of flounder, both for the whole sample and in relation to both sexes. The calculation of the growth rates of length and weight were aided by the equations of von Bertalanffy. Results. The total length of the flounder studied ranged from 4.3 to 46.0 cm for ages from one through ten. The mean length reached 23.7 cm, while the mean age was 4.6 years. The prevalent age classes were III, IV, and V. The growth rates of length were different in males and females. Until the third year of life males grew slightly faster, while from the fourth year, the females grew more rapidly. The von Bertalanffy equations that describe theoretical growth (length and weight) of flounder, from the Gulf of Gdańsk were calculated. Conclusion. The differences found in the morphometric and biological characters between the samples collected in three different locations of the southern Baltic (Pomeranian Bay, Słupsk Furrow, and Gulf of Gdańsk) may indicate that they represent separate stocks (populations).
18

Diel food composition and changes in the diel and seasonal feeding activity of common goby, sand goby and young flounder inhabiting the inshore waters of the Gulf of Gdansk, Poland

58%
Zloch I., Sapota M., Fijalkowska M.
Oceanological and Hydrobiological Studies
|
2005
|
tom 34
|
nr 3
19

The effect of the composition of fatty acids of Baltic fishes and frozen storage process on the antioxidant activity of aqueous extracts of rosemary and sage, as well as BHA and Endox

58%
Szczepanik G., Stodolnik L.
Acta Ichthyologica et Piscatoria
|
2003
|
tom 33
|
nr 1
Background. Natural antioxidants become increasingly important in fish processing and particularly in the preservation phase of fish raw materials. Some of them can protect lipids, containing essential unsaturated fatty acids. The aim of the present study was to determine antioxidant properties of aqueous extracts of rosemary and sage, compared with the activity of BHA (butylated hydroxyanisole) and Endox in lipids of fresh Baltic fishes (herring, sprat, flounder) and those subjected to frozen storage at -25°C for 6 months. Materials and Methods. Antioxidant activity of the additives was determined based on β-carotene changes in fish lipids after 10, 20, 40, and 60 min of heating at 50°C. Results. The plant-origin extracts and the synthetic antioxidants used, inhibited most extensively β-carotene changes in the lipids of non-frozen herring. They were the least effective in non-frozen sprat lipids. The frozen storage lowered the antioxidant action of the additives in relation to β-carotene in lipids of herring and flounder, whereas in sprat lipids the antioxidants used, continued their protective action for β-carotene, during heating. Elongation of the heating time from 10 to 60 min increased the β-carotene losses and their pace followed the logarithmic scale. The activity of the antioxidants in fish lipids decreased along with the increase of polyunsaturated fatty acids (C20 : 5, C22 : 5, and C22 : 6) contents Conclusion. The antioxidant properties of plant-origin additives and synthetic antioxidants decreased along with the increased content on unsaturated fatty acids of fish lipids. Six-month-long frozen storage of the fish raw materials resulted in a decrease of the protective properties of the additives used, in relation to the lipids of Baltic herring and flounder. The best protective properties for lipids of flounder and sprat exhibited Endox, while aqueous extract of rosemary was the most effective in relation to sprat lipids.
20

Growth of the young flounder [Platichthys flesus] in inshore shallow waters of the Gulf of Gdansk

58%
Sapota M. R., Mudrak S.
Oceanological Studies
|
1998
|
tom 27
|
nr 3
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