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1

Occurrence of pikeperch (Sander lucioperca (L.)) and its habitats in northeastern Poland in 1951-1994

100%
Skrzypczak A., Mamcarz A.
Archives of Polish Fisheries
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2005
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tom 13
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nr 1
The study was conducted based on data from lake management books. Pikeperch, Sander lucioperca (L.), was present at various time intervals in 619 lakes in northeastern Poland that covered a total area of 116.2 thousand ha. Based on the frequency of occurrence of this fish species in commercial catches, three categories of habitats were distinguished. The morphologic and morphometric parameters of these three categories of lakes were compared. For each category, the dynamics of temporal changes was characterized in the lakes in which pikeperch lived, and the trend lines of these changes were plotted. An increase in the number of habitats of this predatory fish species appeared in 1951-1965 and was directly connected with its natural migration. The range of fish stocking measures and the time when they began were determined for the three categories of lakes analyzed.
2
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Jakość użytkowa i wartość odżywcza tkanki mięśniowej sandaczy (Sander lucioperca) i szczupaków (Esox lucius) utrzymywanych w polikulturze

84%
Skalecki P., Florek M., Kaliniak A., Kedzierska-Matysek M., Dmoch M.
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
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2016
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tom 12
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nr 1
Celem pracy była ocena jakości użytkowej i wartości odżywczej tkanki mięśniowej sandacza i szczupaka utrzymywanych w polikulturze. Badaniami objęto 16 ryb (po 8 osobników każdego gatunku), odłowionych w jednym stawie gospodarstwa rybackiego położonego w województwie lubelskim. Wykazano, że przy podobnym wieku obu gatunków ryb drapieżnych szczupaki, pomimo większej masy ciała, charakteryzowały się wyższym udziałem wnętrzności i mniejszym udziałem tuszy oraz niższym współczynnikiem kondycji w porównaniu do sandaczy. Skład chemiczny i kaloryczność tkanki mięśniowej porównywanych gatunków była natomiast bardzo zbliżona i wynosiła, odpowiednio dla sandacza i szczupaka: woda – 77,15 i 76,40%; białko – 21,26 i 21,41%; tłuszcz – 0,41 i 0,58%, popiół – 1,43 i 1,42%, energia – 517 i 528 kJ/100 g. Na podkreślenie zasługuje wysoka wartość wskaźnika jakości żywieniowej (INQ) białka ocenianych ryb drapieżnych (6,9 dla sandacza i 6,8 dla szczupaka), wskazująca, że są one dobrym źródłem tego składnika w diecie, zbilansowanym z podażą energii w porcji 100 g filetów.
3

Growth rate and histological picture of the gonads of pike, Esox lucius L., and pikeperch, Sander lucioperca (L.), from the Tresna Reservoir (Lake Zywieckie)

84%
Epler P., Luszczek-Trojnar E., Socha M., Szczerbik P., Sokolowska-Mikolajczyk M., Popek W.
Archives of Polish Fisheries
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2008
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tom 16
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nr 2
The aim of this study was to determine the growth rates of pikeperch, Sander lucioperca (L.), and pike, Esox lucius L., from the Tresna Reservoir. Back-calculations were used to determine fish age. Histological pictures were used to determine the spawning success of the two species compared. The study material was comprised of 18 pikeperch females and 13 males, and 20 pike females and 12 males. The growth rate of pikeperch from the Tresna Reservoir was higher in comparison to populations inhabiting other basins in Poland. The histological analyses of the gonads indicated that pikeperch spawned successfully in the reservoir. The growth rate of the pike in the reservoir was comparable to that of this species in other basins. However, the histological picture of the ovaries indicated that spawning was only partially successful since 25% of females did not spawn and their eggs were in a state of resorption.
4

Artificial spawning of pikeperch (Sander lucioperca (L.)) stimulated with human chorionic gonadotropin (hCG) and mammalian GnRH analogue with a dopamine inhibitor

84%
Zakes Z., Demska-Zakes K.
Archives of Polish Fisheries
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2005
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tom 13
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nr 1
The aim of the experiment was to identify the possibilities of stimulating pikeperch spawning with human chorionic gonadotropin (hCG) and Ovopel, a mammalian GnRH analogue (D-Ala⁶ Pro⁹ NEt-mGnRH) with a dopamine inhibitor (metoclopramide). Pikeperch spawners were caught with trap gear (fyke-nets) during the pre-spawning season from the Tałty and Tałtowisko lakes (Masurian Lakeland, northern Poland). After transport that lasted an hour, the fish were placed in tanks in a recirculating system and then segregated by sex. The females were divided into five experimental groups, each containing six specimens. The fish were injected twice at 24 hour intervals with hCG (group I - 200 and 200IU kg⁻¹ body weight (BW); group II - 200 and 500IU kg⁻¹ BW), Ovopel (group III - 0.25 and 0.50 pellets kg⁻¹ BW; group IV - 0.25 and 1.0 pellets kg⁻¹ BW) or 0.7% NaCl solution (group V, control - 0.2 and 0.5 cm³ kg⁻¹ BW). The effects of the hormonal stimulation expressed as the percentage of ovulating females, the degree of spawning synchronicity, and survival of the embryos to the eyed-egg stage were highly differentiated. The highest percentages of spent fish were obtained in the group stimulated with hCG - 83.3% (group I) and 100% (group II) of the females ovulated. The development of the oocytes in this group was rapid and synchronous, which was reflected in the shortened and relatively similar latency period (47 - 57 hours following the first injection; mean ≈ 51 hours) in individual females. No impact was noted with regard to hCG dose (400 vs. 700 IU kg⁻¹ BW) on the latency time or on egg quality. Ovopel did not positively affect either oocyte maturation or pikeperch ovulation. None of the fish from group III ovulated, and in group IV, as in the control group, eggs were obtained only from three (50%) females. In contrast to group V, the eggs of females stimulated with Ovopel were of low biological quality and survival to the eyed-egg stage ranged from 0 to 8%. Higher mortality among the females was also noted, especially in group III. The experiment indicated that hormonal stimulation with hCG is effective, while that with Ovopel was surprisingly ineffective.
5
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The effect of feeding on aminopeptidase and non-specific esterase activity in the digestive system of pike-perch (Sander lucioperca L.)

84%
Kamaszewski M., Ostaszewska T.
Annals of Warsaw University of Life Sciences - SGGW. Animal Science
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2013
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tom 52
The pike-perch (Sander lucioperca L.) at the age of 18 days were fed for 21 days using three different diets: Agio Norse (An), casein-gelatin (Cas), cod meal with gelatin (Mac) and nauplius Artemia salina (Art - control diet). On the last day of the experiment, fish fed Art and An diets had the statistically significant highest body mass, length, and survival. On the last day, the highest aminopeptidase activity in the anterior intestine and posterior intestine was registered in fish fed nauplius Artemia salina. The lowest activity of this enzyme in the anterior intestine was to be found in fish fed with Cas diet, while there was no difference between among groups in the posterior intestine. The non-specific esterase activity was registered in the stomach, liver, anterior intestine as well as in the posterior intestine. The lowest activity of this enzyme in the stomach was observed in the pike-perch fed with the Cas diet. In the anterior intestine, the highest activity was registered in fish fed with Art, and the lowest - on the Cas and Mac diet. The results of the current research prove that feeding the pike-perch An diet has a positive effect of the survival of the pike-perch, their growth rate and the activity of the enzymes. By contrast, feeding pike-perch Cas and Mac diets did not satisfy nutritional needs of fish, resulting in their low survival, growth rate and low activity of the enzymes examined.
6

Description of pikeperch, Sander lucioperca (L.), semen obtained from males held under different rearing conditions

84%
Cejko B. I., Glogowski J., Kowalski R. K., Kucharczyk D., Targonska K.
Archives of Polish Fisheries
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2008
|
tom 16
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nr 1
7

Pikeperch (Sander lucioperca (L.)) exploitation in reference to stocking programs and the size structure of its habitats in northeastern Poland in 1951-1994

67%
Skrzypczak A., Mamcarz A.
Archives of Polish Fisheries
|
2005
|
tom 13
|
nr 2
The analyses were based on commercial fisheries records of catches and stocking in lakes in northeastern Poland. The authors described the lake size structure in three categories of pikeperch, Sander lucioperca (L.), habitats determined by the frequency of occurrence of this species in commercial catches. In each of the five lake size classes, the moment pikeperch individuals appeared was pinpointed in light of stocking programs. Differences in the value of pikeperch exploitation parameters were determined in the three habitat types, and the level of variation was examined in stocked and unstocked lakes. Trend lines of pikeperch exploitation in the 1951-1994 period were plotted for these groups of lakes. The importance of pikeperch stocking for the occurrence of this species in new habitats declined as the size of the studied lakes increased.
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