Wyniki wyszukiwania - AGRO

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Gillnet selectivity to roach, Rutilus rutilus, from the Szczecin Lagoon, Poland

100%

Psuty I., Draganik B., Blady W.

Acta Ichthyologica et Piscatoria

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2007

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tom 37

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nr 1

17-23

Background. Roach, Rutilus rutilus, comprise a large proportion of the total catch in the Szczecin Lagoon, and are caught mainly as bycatch in gillnets targeting perch, Perca fluviatilis. The minimum landing length for roach and perch is 17 cm TL and the minimum mesh size is 30 mm bar length. However, little is known about the selectivity of roach, which may have implications for implementing effective regulations. Consequently, the aims of the study were to estimate roach selectivity curves and to compare the results with perch selectivity. Materials and Methods. The study was based on the length frequency of catch from standardized fishing practice with commercial gillnets of mesh sizes ranging from 25 to 35 mm (bar length) and modelled using various generalized linear models. The best model was selected using deviance criteria. Results. The log-normal selectivity model provided the best fit, with spread relevant to mesh size under the assumption of equal fishing power. The estimated parameters were 18.7 cm and 1.5 (mode and spread of selectivity curve for the smallest mesh size). Conclusion. Although the most efficient mesh size for roach was 26 mm, its use in the Szczecin Lagoon is limited by impact on perch. All the studied mesh sizes prevented catches of undersized roach, while mesh sizes from 28 mm prevented catches of undersized perch (MLL = 17 cm TL). The authors concluded that the current 30 mm minimum mesh size is likely effective at preventing the harvest of undersized perch and roach.

2

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The effect of kairomones of the roach Rutilus rutilus on the movements of the zebra mussel Dreissena polymorpha

100%

Zielska J., Dzierzynska-Bialonczyk A., Kobak J.

Folia Malacologica

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2016

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tom 24

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nr 1

3

Growth of the young-of-the-year roach, Rutilus rutilus [L., 1758], in Miedzyodrze

100%

Kompowski A., Neja Z.

Acta Scientiarum Polonorum. Piscaria

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2006

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tom 05

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nr 1

4

Model of energy flow in the bottom sediments of littoral zone of a dam reservoir with regard to detritivorous roach, Rutilus rutilus [L.]

100%

Starzecka A., Bednarz T., Amirowicz A.

Polish Journal of Ecology

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1999

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tom 47

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nr 1

5

Metazoan parasites of roach Rutilus rutilus [L.] originating from the Ukiel Lake [Poland}

100%

Dzika E., Kot J., Kobus A.

Wiadomości Parazytologiczne

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1998

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tom 44

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nr 3

6

Fecundity of roach [Rutilus rutilus L.] in heated Lake Goslawskie

84%

Wilkonska H.

Archiwum Rybactwa Polskiego

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1994

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tom 02

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nr 2

301-309

7

Zmiennosc biometryczna ploci [Rutilus rutilus] z przyduchowego zbiornika Brzoza [Pojezierze Lubuskie]

84%

Czerniejewski P.

Magazyn Przemysłu Rybnego

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2002

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nr 4

40-43

8

Growth rate of roach - Rutilus rutilus [L.] in Lake Dabie

84%

Zalachowski W., Krzykawska I.

Acta Ichthyologica et Piscatoria

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1995

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tom 25

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nr 1

3-18

Length and weight growth rates of roach as well as the length-weight relationship were determined from 196 individuals caught in 1992. Separate determinations were made for males and females and for different age groups. The von Bertalanffy equation and the binomial model were used to determine growth. Significance of differences between results obtained for 6 samples of different size, collected within July-October, was compared. Differences between growth rate indicators for the period 1974-1976 and 1992 were evaluated.

9

Energy budget of roach [Rutilus rutilus L.] larvae at the beginning of exogenous feeding

84%

Zelepien J., Karpinski A.

Archiwum Rybactwa Polskiego

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1998

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tom 06

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nr 1

143-151

10

Pasozyty [Metazoa] ploci Rutilus rutilus [L.] w jeziorach Pojezierza Mazurskiego jako wskaznik jakosci srodowiska wodnego

84%

Dzika E.

Rozprawy i Monografie. Uniwersytet Warmińsko-Mazurski w Olsztynie

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2003

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tom 73

1-81

11

Does predator-induced behaviour protect the zebra mussel from roach?

84%

Kobak J., Kakareko T.

Folia Malacologica

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2012

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tom 20

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nr 1

12

Cechy przeliczalne i mierzalne płoci Rutilus rutilus /L./ dolnego biegu rzeki Wisły

84%

Dabrowski J.

Zeszyty Naukowe Akademii Techniczno-Rolniczej w Bydgoszczy. Zootechnika

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1991

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tom 22

13

Rozwoj larwalny ploci [Rutilus rutilus L.]

84%

Zelepien J., Hutorowicz A.

Komunikaty Rybackie

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1997

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nr 4

9-11

14

An assessment of parasite variation in wild populations of roach, Rutilus rutilus (L.), in Lithuanian rivers

84%

Rakauskas V., Blazevicius C.

Archives of Polish Fisheries

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2010

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tom 18

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nr 4

15

The accumulation of heavy metals and cytometric characteristics features of red blood cells in different ages of carp fish from Zaporozhian Reservoir

84%

Fedonenko O., Yesipova N., Sharamok T.

International Letters of Natural Sciences

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2016

|

tom 53

The research was held in terms of Zaporozhian Reservoir (Ukraine) from 2014 till 2015 year. It was established that prussian carp (Carassius gibelio Bloch, 1782) and roach (Rutilus rutilus Linnaeus, 1758) underyearlings accumulate essential elements more extensively, especially zinc, comparing to adults ones. The species characteristic of heavy metals accumulation in the carp fish body was observed. The intensity level of erythropoiesis occurrence was higher in young fish of both species of carp fish. The specific features of cytometric characteristics of fish erythrocytes were identified: the relative amount of mature red blood cells prevailed in roach, and the area of mature red blood cells was significantly higher in prussian carp. In addition, in the young roach among immature forms of red blood cells significantly higher percentage of polychromatophil normoblasts was revealed.

16

Determination of frequency distribution of oocytes at different maturity phases in the ovaries of roach, Rutilus rutilus [L.]

84%

Kopiejewska W.

Acta Ichthyologica et Piscatoria

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2003

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tom 33

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nr 1

Background. The frequency distribution of oocytes at different maturity phases can be used to assess environmental effects on gametogenesis in teleosts. As oocyte counting is labour-intensive, little attention is generally paid to changes in oocyte numbers in oogenesis analysis. Materials and Methods. Anterior, middle, and posterior ovarian segments from three pre-spawning female roach, Rutilus rutilus (L.) were fixed in buffered formalin, dehydrated, and embedded in paraffin. Serial 10-µm sections were cut with a microtome and stained with haematoxylin and eosin. This paper compares two methods for determining the frequency distribution of oocytes at different maturity phases and their occurrence in particular segments of the ovaries in roach, Rutilus rutilus: counting oocytes in serial microtome sections and the use of Abercrombie′s formula. Results. Differences between frequency distributions determined by the two methods were statistically insignificant (P > 0.05), as were the frequency distributions of oocytes in different ovarian segments. Conclusion. Determination of frequency distribution of oocytes at different maturity phases can therefore be achieved with the less time- and labour-intensive method of using Abercrombie′s formula.

17

First report of Philometra obturans [Nematoda] and Neoergasilus japonicus [Copepoda] in Germany

84%

Knopf K., Holker F.

Acta Parasitologica

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2005

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tom 50

|

nr 3

Parasitological examination of 150 young-of-the-year roach (Rutilus rutilus) during winter 2001/2002 in northeast Germany revealed the presence of larval Philometra obturans and Neoergasilus japonicus. This is the first record of roach as a paratenic host for P. obturans, and both records are the first for Germany. There is evidence that P. obturans has been overlooked in previous studies, whereas N. japonicus appears to be a neozoan species originating from Eastern Asia.

18

Growth rate of the roach, Rutilus rutilus [L.] in the Pomeranian Bay

84%

Zalachowski W., Krzykawska I., Wieski K.

Zeszyty Naukowe. Akademia Rolnicza w Szczecinie. Rybactwo Morskie i Technologia Żywności

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1997

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tom 23

19

Description of three new European cryptic species of Gyrodactylus Nordmann, 1832 supported by nuclear and mitochondrial phylogenetic characterization

84%

Kuusela J., Zietara M. S., Lumme J.

Acta Parasitologica

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2008

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tom 53

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nr 2

Three previously undescribed species of wageneri group of Gyrodactylus Nordmann, 1832 (subgenus Limnonephrotus, Gyrodactylidae, Monogenoidea) related to G. lavareti Malmberg, 1957 are described here. G. pomeraniae sp. nov. was found on roach (Rutilus rutilus) in Poland and Belgium, G. ouluensis sp. nov. on roach in Finland and G. salvelini sp. nov. on Arctic charr (Salvelinus alpinus) in the Lake Inari, Finland. A molecular redescription of G. lavareti on Coregonus lavaretus is also presented, and G. bliccensis on Alburnus alburnus from river Morava, Czech Republic is included in the phylogenetic analysis. In addition, a hybrid clone of maternal G. pomeraniae sp. nov. and paternal G. lavareti found on farmed rainbow trout (Oncorhynchus mykiss) is characterized. The molecular species description was based on the complete CO1 gene of the mitochondrial DNA, and on phylogenetic comparison of the internal transcribed spacer segment (ITS1-5.8S rDNA-ITS2) of nuclear ribosomal DNA. The species hosted by cyprinids were basal in the phylogeny rooted by numerous relatives of wageneri-species group.

20

The first record of Aspidogaster limacoides Diesing, 1834 [Aspidogastridae: Aspidogastrea] in Poland

84%

Popiolek M., Luczynski T., Jarnecki H.

Wiadomości Parazytologiczne

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2007

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tom 53

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nr 2

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