Ecology and Evolutionary Biology

Volume 4, Issue 3, September 2019

  • Profitability of Investment in Fish Farming Enterprise in Ibadan Metropolis, Oyo State, Nigeria

    Oke Joel Taiwo Oluseye, Kehinde Ayodeji Damilola

    Issue: Volume 4, Issue 3, September 2019
    Pages: 28-32
    Received: 29 January 2019
    Accepted: 7 March 2019
    Published: 20 October 2019
    Abstract: This paper investigated profitability of investment in fish farming enterprise in Ibadan metropolis, Oyo State, Nigeria. Specifically, it described the socio-economic characteristics of fish farmers in the study area, examined the cost and return to fish farming enterprise and determined the factors that affect investment in fish farming enterprise... Show More
  • Monitoring the Activity of Feed Enzymes in Vitro and Their Activity in the System that Modulates the GIT

    Valeriy Sergeevich Kryukov, Ilona Vyacheslavovna Glebova, Sergej Vladimirovich Zinoviev

    Issue: Volume 4, Issue 3, September 2019
    Pages: 33-38
    Received: 26 June 2019
    Accepted: 12 September 2019
    Published: 23 October 2019
    Abstract: 24 feed enzyme endo-1,4-glucanase (glucanase) and endo-1,4-xylanase (xylanase) have been described. Their activity was studied under in vitro conditions simulating the gastrointestinal tract of the poultry. A decrease in the temperature of the medium from 50°C to 38°C reduced the activity of all enzymes. Fekord 2004-S, Agrocell Plus, Agrocell, Rova... Show More
  • Assessment of the Erosion Stability of Slopes in Terms of Digression and the Degree of Overgrowth

    Dmitriy Mashtakov, Alexey Avtonomov

    Issue: Volume 4, Issue 3, September 2019
    Pages: 39-44
    Received: 30 March 2019
    Accepted: 28 May 2019
    Published: 25 October 2019
    Abstract: Agroecological systems of slopes experience stress due to constant dynamic movements, especially on the slopes of high steepness. We have formulated the idea of critical levels in the dynamic process of slope agroecological systems, which is subsequently considered as an indicator of sustainability. When analyzing the dynamic processes on the slope... Show More