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    Wyświetlanie 1-4 z 4
    Tytuł:
    Use of sulphur and carbon stable-isotope composition of fish scales and muscles to identify the origin of fish
    Autorzy:
    Trembaczowski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2086488.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    stable isotopes
    δ34S
    δ13C
    fish scales
    fish muscle
    food web relations
    Opis:
    δ34S and δ13C analyses were used to determine the origin of trout specimens. The isotope record of their scales and muscles are compared with a database previously obtained from wild- and reared fish coming from Polish rivers and pond farms. The comparison made it possible to find out whether the trout were wild or reared.
    Źródło:
    Mineralogia; 2011, 42, 1; 33--37
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of sulphur and carbon stable-isotope composition of fish scales and muscles to identify the origin of fish
    Autorzy:
    Trembaczowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086538.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Mineralogiczne
    Tematy:
    stable isotopes
    δ34S
    δ13C
    fish scales
    fish muscle
    food web relations
    Opis:
    δ34S and δ13C analyses were used to determine the origin of trout specimens. The isotope record of their scales and muscles are compared with a database previously obtained from wild- and reared fish coming from Polish rivers and pond farms. The comparison made it possible to find out whether the trout were wild or reared.
    Źródło:
    Mineralogia; 2011, 42, 1; 33--37
    1899-8291
    1899-8526
    Pojawia się w:
    Mineralogia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory Manual on General and Special Ichthyology
    Autorzy:
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1112680.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    anatomy
    fins
    fish
    ichthyology
    morphology
    scales
    Opis:
    The manual presents the main methods for studying fish. The general features of the external structure of fish are described: the shape of the body, external organs, the structure and functions of the fins, the types of scales, and the structure of the lateral line. The indicators of morphometric studies of fish with the use of meristic and plastic features according to the classical schemes of measuring fish are also presented. A short description of the statistical method of comparative study of two data samples using the Student's test is given. A method for determining the age of fish by scales is described, as well as a methodology for calculating the annual growth of fish. General information on anatomical structure of fishes is also given. Furthermore, methods of studying the fertility of fish, as well as assessing the nutrition of fish, are described. Particular attention is paid to creating fish preparations: the production of the skeleton of fish, the design of fixed moist preparations and the preparation of a stuffed fish. The presented material has visual illustrations, accompanied by short biological information and forms of tabular material design. The proffered material will be useful for students of the biological and ecological profile, students of natural and agrarian faculties, post-graduate students and young scientists.
    Źródło:
    World News of Natural Sciences; 2018, 18, 1; 1-51
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie wieku kozy (Cobitis taenia) i kozy złotawej (Sabanejewia aurata) z wykorzystaniem niektórych struktur twardych
    Age Validation of Spined Loach (Cobitis taenia) and Golden Loach (Sabanejewia aurata) Using Some Calcinated Structures
    Autorzy:
    Lampart-Kałużniacka, M.
    Pietraszewski, D.
    Marszał, L.
    Heese, T.
    Przybylski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1819042.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    określanie wieku kozy
    struktury twarde
    otolith growth
    fin rays
    population
    fish
    lake
    temperature
    precision
    accuracy
    biology
    scales
    Opis:
    Age is one of the most important life history variables of fish used to estimate growth rate, mortality rate and production. Age determining is usually carried out by analyzing any of several calcified structures, such as scales, otoliths (more frequently) or fin rays (rather seldom). Scales are easy to collect and this is the reason why this structure has been widely used, but for several reasons annuli may be ambiguous to discern on scales, especially in the loaches. The material was collected in May 2010 in the Pilica River. A total of 29 fish individuals, including 16 spined loach and 13 golden loach, were examined. The range of total length (TL) of the fishes in the sample studied was 43–102 mm in the former and 35 do 70 mm in the latter species, respectively. The precision of ageing using the cross-sections of dorsal, caudal, anal, pectoral and ventral fins rays were compared with age determination on the basis of otoliths. The analysis of the annuli of the investigated structures revealed that individuals aged 2 to 5 years (golden loach) and aged 3 to 7 years (spined loach) occurred in the material (Table 1 and 2, respectively). The obtained results indicate that in natural water bodies older individuals than formerly presumed may occur. Microscopic slides of the cross sections of otoliths and fins are most reliable for ageing such structures. The anal fin (A) it the most reliable structure for ageing, i.e. the age obtained from the fin is least divergent from the age obtained from the otolith. While planning the investigations of the age structure of populations it is necessary to establish the periods of sampling in a way that will be most congruent with the period of annuli formation.
    Źródło:
    Rocznik Ochrona Środowiska; 2013, Tom 15, cz. 2; 1041-1052
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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