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1

Dependence of egg diameter on the size and age of cultivated female lake trout (Salmo trutta m. lacustris L.)

100%
Bartel R., Falowska B., Bieniarz K., Epler P.
Archives of Polish Fisheries
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2005
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tom 13
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nr 1
The aim of this study was to determine the impact of the size and age of cultivated female lake trout on the size of their eggs. The material was collected from 1995 to 1999 at the Olszówka Fish Farm in southern Poland. Eggs were obtained from 310 trout females with a total length range of 30-53 cm (fish aged three to seven years). Following the hardening phase, the maximum and minimum diameters of the eggs were measured and the water volume (calculated based on water displacement) of thirty eggs was determined. The mean egg diameter ranged from 4.08 to 5.85 mm. The variance of egg size within age groups was not large, and the coefficient of variation (V, %) ranged from 2.64 to 6.91. The results indicate that the egg size of lake trout cultivated in ponds was significantly dependent on the size of the females and to a lesser degree on their age.
2

Wiek i wzrost lipienia (Thymallus thymallus L.) z rzeki Poprad

100%
Laskowski P., Bieniarz K., Falowska B.
Roczniki Naukowe Zootechniki. Suplement
|
2003
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tom 17
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nr 2
3

Wiek i wzrost brzany (Barbus barbus, L.) z rzeki Poprad

100%
Dobosz P., Bieniasz K., Falowska B.
Roczniki Naukowe Zootechniki. Suplement
|
2003
|
tom 17
|
nr 2
4

Wpływ zróżnicowanej obsady karpia na zespoły bentosu

100%
Falowska B., Tokarz K., Kownacki A.
Roczniki Naukowe Zootechniki. Suplement
|
2003
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tom 17
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nr 2
5

Interaction of ghrelin and opioids in luteinizing hormone (LH) secretion by pituitary cells of common carp, Cyprinus carpio (Actinopterygii: Cypriniformes: Cyprinidae), cultured in vitro

88%
Sokolowska-Mikolajczyk M., Socha M., Mikolajczyk T., Epler P., Falowska B.
Acta Ichthyologica et Piscatoria
|
2011
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tom 41
|
nr 2
Background. Ghrelin, a newly discovered hormone is involved mainly in the regulation of body energy homeostasis. It has also been proved that ghrelin affects many other processes including the control of the hypothalamo-pituitary-gonadal axis in vertebrates. Ghrelin interacts also with other peptides and neurotransmitters, which are involved in gonadotropin release, such as endogenous opioid peptides. The aim of the experiment was to compare the effects of ghrelin and naltrexone, an opioid antagonist, on LH secretion by pituitary cells of mature female and male common carp, Cyprinus carpio L. Materials and methods. In the in vitro experiment the time-dependent (10 and 24 h) action of ghrelin (10-7 or 10-6 M) and naltrexone at 10-6 M added alone or in combination on LH secretion by enzymatically dispersed pituitary cells of mature female and male carp (Cyprinus carpio L.) was studied. Results. Ghrelin alone at a dose of 10-6 M stimulated LH secretion after 10 h of female- but not male-derived cell incubations. Ghrelin at 10-7 M had no effect on LH secretion from either female or male cells. Naltrexone alone stimulated LH secretion only after 24 h of female cell culture. In male cells no significant changes in LH secretion in response to naltrexone alone were found after 10 or 24 h incubation period. Combined treatment (ghrelin 10-7 or 10-6 M and naltrexone) stimulated LH secretion in female and male cell incubations at 10 and 24 h: LH levels were significantly higher in comparison to control, to ghrelin alone (in cells of both sexes) and to naltrexone alone (in male cells only). Conclusion. The results suggest that opioids and ghrelin may control LH secretion in carp acting synergistically, probably through the same receptor type. The concept of opioid and ghrelin interaction in the gonadal steroid feedback on LH release is also discussed.
6

New data regarding the distribution and ichthyocoenological affinities of the Ukrainian brook lamprey, Lampetra (Eudontomyzon) mariae (Cephalaspidomorphi: Petromyzontiformes: Petromyzontidae), in southern Poland

64%
Drag-Kozak E., Nowak M., Szczerbik P., Klaczak A., Mikolajczyk T., Falowska B., Socha M., Popek W.
Acta Ichthyologica et Piscatoria
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2011
|
tom 41
|
nr 2
Fifteen new localities of the Ukrainian brook lamprey, Lampetra (Eudontomyzon) mariae, were found within 2008–2010. The majority of them are located in the Nida River drainage. Additionally, the occurrence of that species in the Strwiąż River, a tributary of the Dniester, was confirmed. The cluster analysis performed suggests, that L. mariae exhibits strong affinity to the stone loach, Barbatula barbatula, and the Eurasian minnow, Phoxinus phoxinus. We believe that the distribution of L. mariae on the territory of Poland seems to be strongly underestimated.
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