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1

Przygotowanie sadzawki do zimowania

100%
Malyszek A., Krejszeff S.
Nasze Akwarium. Miesięcznik Miłośników i Hodowców Ryb
|
2003
|
nr 10[49]
2

Zima w oczku wodnym

100%
Kucharczyk D., Krejszeff S.
Nasze Akwarium. Miesięcznik Miłośników i Hodowców Ryb
|
2003
|
nr 11[50]
3

Fundusze unijne na rybactwo śródlądowe oraz ochronę środowiska

100%
Jamroz M., Krejszeff S.
Przegląd Rybacki
|
2008
|
tom 33
|
nr 5[101]
4

Sympozjum SPIN i TBR w Bialowiezy

100%
Targonska-Dietrich K., Krejszeff S.
Komunikaty Rybackie
|
2004
|
nr 6
34-35
5

Lilie wodne klimatu umiarkowanego i tropikalnego. Cz. 2. Tropikalne lilie wodne

100%
Malyszek A., Krejszeff S.
Nasze Akwarium. Miesięcznik Miłośników i Hodowców Ryb
|
2003
|
nr 09[48]
6

Ryba w sadzawce - cz. I. Historia

100%
Kucharzyk D., Krejszeff S.
Nasze Akwarium. Miesięcznik Miłośników i Hodowców Ryb
|
2004
|
nr 04[55]
7

Wybrane elementy wczesnej ontogenezy ryb

81%
Krejszeff S., Kuprem K., Hliwa P.
Magazyn Przemysłu Rybnego
|
2009
|
nr 2
8

Initial reports of a light-colored form of chub, Leuciscus cephalus (L.)

81%
Krejszeff S., Zarski D., Targonska K., Kucharczyk D.
Archives of Polish Fisheries
|
2008
|
tom 16
|
nr 4
9

ABC kontrolowanego rozrodu lina

81%
Krejszeff S., Palinska-Zarska K., Zarski D.
Komunikaty Rybackie
|
2019
|
nr 1
10

Wczesny rozwój osobniczy ryb

81%
Krejszeff S., Kupren K., Hliwa P.
Przegląd Rybacki
|
2009
|
tom 33[!]
|
nr 2[104]
11

Przedowulacyjne stadia dojrzałości oocytów jako narzędzie służące do synchronizacji owulacji w kontrolowanym rozrodzie okonia

81%
Krejszeff S., Palinska-Zarska K., Zarski D.
Komunikaty Rybackie
|
2018
|
nr 4
12

Wskaźniki jakości jaj okonia podczas rozrodu w warunkach kontrolowanych

81%
Krejszeff S., Palinska-Zarska K., Zarski D.
Komunikaty Rybackie
|
2018
|
nr 5
13

ABC kontrolowanego rozrodu jazia

81%
Krejszeff S., Zarski D., Ciesla M.
Komunikaty Rybackie
|
2018
|
nr 3
14

Artificial reproduction of two different spawn-forms of the chub

81%
Krejszeff S., Targonska K., Zarski D., Kucharczyk D.
Reproductive Biology
|
2010
|
tom 10
|
nr 1
15

Influence of water temperature on eggs incubation time and embryonic development of fish from genus Leuciscus

71%
Kupren K., Mamcarz A., Kucharczyk D., Prusinska M., Krejszeff S.
Polish Journal of Natural Sciences
|
2008
|
tom 23
|
nr 2
461-481
Wild living spawners of dace Leuciscus leuciscus (L.), ide L. idus (L.) and chub L. cephalus (L.), were obtained from rivers of central (the Pisa River basin) and northern (the Pasłęka River basin) Poland and next transported to a hatchery for artificial reproduction. The obtained eggs were dry fertilized and next incubated in water as different constant temperatures ranging from 4.5 to 29.0°C. The hatched embryos were kept at the same temperatures until the moment of complete yolk sac resorption and later fed ad libitum on live nauplial Artemia sp. stages. The power function was applied for determination of the relation between the temperature and time until and achievement of each of the thirteen characteristic stages of embryonic development. It was shown that the pace of embryonic development increased with the temperature increase. In the majority of cases, at identical thermal conditions, both the incubation time and the pace of embryonic development were much less diversified among individual of the same species originating from different population than between the individual species. The obtained data finds application in optimization of early raring process and as a consequence will be an important tool in protection of endangered species.
16

The effect of prepared activating liquid on the survivability of ide Leuciscus idus (L.) embryos

71%
Kucharczyk D., Gomulka P., Krejszeff S., Zarski D., Targonska K.
Polish Journal of Natural Sciences
|
2010
|
tom 25
|
nr 2
A preliminary examination was carried out into the effect that various activating liquids have on the survivability of ide Leuciscus idus (L.) embryos. It was found to be similar (54–59%) in four study groups; the embryo survivability was found to have decreased (44%) only in the group where non-sterilised tap water was used for gamete activation. A negative correlation was found between water conductivity, salinity and sperm motility. A positive correlation was found between water conductivity, salinity and embryo survivability. A negative correlation between the sperm motility and the survivability of ide embryos at the eyed-egg stage shows that the fertilisation result is more affected by the duration of sperm movement than by the percentage of motile sperm.
17

Reproductive parameters of common carp (Cyprinus carpio L) spawners during natural season and out-of-season spawning

61%
Kucharczyk D., Targonska K., Hliwa P., Gomulka P., Kwiatkowski M., Krejszeff S., Perkowski J.
Reproductive Biology
|
2008
|
tom 08
|
nr 3
18

Artifical spawning of common tench [Tinca tinca L.] collected from wild populations

61%
Kucharczyk D., Kujawa R., Mamcarz A., Targonska K., Krejszeff S., Wyszomirska S.
Polish Journal of Natural Sciences
|
2007
|
tom 22
|
nr 1
107-115
Artificial spawning of tench collected from wild populations was studied under controlled conditions. In first part of present work, the accurate moment of applying hormonal injection was tested. The best results were obtained, when fish were stimulated between 1st and 3rd day after their collection. From tested hormonal combination (second part of work) ovopel containing GnRHa and dopamine antagonist: metoclopramide, produced the best results. All tested hormones influenced in high quality of oocytes. The differences were observed in the latency time. Fish stimulated by carp pituitary extract (CPE) ovulated much earlier than those stimulated by ovopel. Spawning techniques described in this paper were successful and provided consistent results in reproduction of tench collected from wild populations.
19

The influence of stocking density on survival and growth of Buenos Aires tetra [Hemigrammus caudovittatus] larvae reared under controlled conditions

61%
Kupren K., Kucharczyk D., Prusinska M., Krejszeff S., Targonska K., Mamcarz A.
Polish Journal of Natural Sciences
|
2008
|
tom 23
|
nr 4
881-887
Studies were conducted on the influence of stocking densities: 50, 100, 150 and 200 individuals dm⁻³ on survival and growth rates of Buenos Aires tetra larvae during 25 days of initial rearing under controlled conditions. The larvae were fed ad libitum with live nauplial stages of Artemia sp. The results of initial rearing obtained indicate that in case of tested appropriate environmental conditions of rearing larvae the densities up to 200 individuals dm⁻³ could be applied without clear negative influence on their survival and growth rate.
20

Influence of individual variability in the percentage of motile spermatozoa and motility time on the survival of embryos of chosen fish species

61%
Targonska K., Kucharczyk D., Mamcarz A., Glogowski J., Krejszeff S., Prusinska M., Kupren K.
Polish Journal of Natural Sciences
|
2008
|
tom 23
|
nr 1
178-187
Studies on the influence of individual spermatozoa motility parameters (% of motility, motility time) on survival of embryos to the eyed-egg-stage were conducted on four freshwater fish species: burbot, ide, Eurasian perch and goldfish. Semen from individual males was collected to separate syringes and next the spermatozoa motility parameters were determined. Samples of oocytes originated from one female from each of the species covered. Each sample of eggs was fertilized with semen originating from a different male. Additionally an attempt was made to fertilize the oocytes with the pooled semen collected from many males, which formed as the control. At the eyed-egg-stage the numbers of live and dead embryos were counted. Aiming at determining the influence of the examined spermatozoa motility parameters single and multiple regression analysis was conducted. It was established that the highest embryos average survival values obtained after fertilization of spawn samples with semen originating from individual males did not differ from the results obtained for the controls that were fertilized with semen from pooled sample. In all cases investigated significant relationships between the spermatozoa motility parameters and the survival of embryos were recorded.
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