Wydanie 316(33)1 2015

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https://oa.zut.edu.pl/handle/20.500.12539/716

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Przeglądaj Wydanie 316(33)1 2015 wg Temat "Dyscyplina::Nauki rolnicze::Zootechnika i rybactwo"

Teraz wyświetlane 1 - 2 z 2
  • Miniatura
    PozycjaOpen Access
    The Conservation Requirements of Rare ind Threatened Vascular Plants of Natura 2000 Habitats of the Dolina Płoni i Jezioro Miedwie (Płonia Valley and Miedwie Lake) Special Area of Conservation
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2015) Bacieczko, Wanda; Kaszycka, Emilia; Department of Meteorology and Landscape Architecture, West Pomeranian University of Technology, Szczecin, Poland; Department of Meteorology and Landscape Architecture, West Pomeranian University of Technology, Szczecin, Poland
    The Dolina Płoni i Jezioro Miedwie (Płonia Valley and Miedwie Lake) PLH 320006 is one of the most valuable Natura 2000 sites in West Pomerania. It has been established to protect 17 types of natural habitats, 2 plant species, and 4 animal species. The aim of this study was the selection of the most valuable vascular plant species found in this site. From the 745 species recorded within the research area, 93 taxa of high environmental value have been chosen. Among them, there are legally protected species, as well as the taxa endangered with extinction perspective, vulnerable and rare to Poland and West Pomerania. More than a half of the valuable species constitute the indicators of natural habitats protected in the site. The most numerous are the species characteristic for natural and semi-natural grassland habitats. The major threats to the selected taxa include: eutrophication, improper water management, secondary succession caused by the abandonment of traditional agricultural methods, and simplification of the age- and species-structure of woods, which all result in the decrease of habitats biological diversity.
  • Miniatura
    PozycjaOpen Access
    Physical Traits of Insemination Boar Ejaculates Depending on the Time from previous Ejaculate Collection
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2015) Adamiak, Agnieszka; Kondracki, Stanisław; Wysokińska, Anna; Bajena, Magdalena; Department of Animal Reproduction and Hygiene, University of Natural Sciences and Humanities, Siedlce, Poland; Department of Animal Reproduction and Hygiene, University of Natural Sciences and Humanities, Siedlce, Poland; Department of Animal Reproduction and Hygiene, University of Natural Sciences and Humanities, Siedlce, Poland; Department of Animal Reproduction and Hygiene, University of Natural Sciences and Humanities, Siedlce, Poland
    The experimental material consisted of 52 805 ejaculates obtained from 335 boars. The ejaculates were collected using the gloved-hand technique. Each ejaculate was assessed using standard methods for the following physical traits: volume, sperm concentration, total number of spermatozoa, and number of insemination doses per ejaculate. The collected materials were grouped according to the criterion of the time from previous collection of ejaculates. The time elapsed from the collection of the previous ejaculate significantly affects the physical traits of ejaculates. Ejaculate volumes, sperm concentrations and the total numbers of spermatozoa in the ejaculates rise along with increasing time intervals from previous ejaculate collections. The numbers of insemination doses prepared from a single ejaculate also rise. The highest increase in the numbers of spermatozoa in the produced ejaculates and in the numbers of insemination doses prepared from the ejaculates is observed after extending the time interval from the previous collection to 4, 5, 6, 7 and 8 and more days. After three or fewer days from the previous collection, high ejaculate collection frequency results in low numbers of spermatozoa in the produced ejaculates and low numbers of insemination doses prepared from the ejaculates.