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Results for "environment"
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  • Selective breeding in aquaculture
    Selective breeding in aquaculture holds high potential for the genetic improvement of fish and shellfish. Unlike terrestrial livestock, the potential benefits of selective breeding in aquaculture were not realized until recently. This is because high mortality led to the selection of only a few broodstock, causing inbreeding depression, which then forced the use of wild broodstock. This was evident in selective breeding programs for growth rate, which resulted in slow growth and high mortality.[17] Control of the reproduction cycle was one of the main reasons as it is a requisite for selective breeding programs. Artificial reproduction was not achieved because of the difficulties in hatching or feeding some farmed species such as eel and yellowtail farming.[18] A suspected reason associated with the late realisation of success in selective breeding programs in aquaculture was the education of the concerned people – researchers, advisory personnel and fish farmers. The education of fish biologists paid less attention to quantitative genetics and breeding plans.[19]
    By: Sali Hamilton
    Thursday, May 27, 2021
    AGRI-FOOD SYSTEMS
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  • Types of Environmental Ecosystems
    https://sciencing.com/types-environmental-ecosystems-8640.html Types of Environmental Ecosystems An ecosystem consists of all the living and non-living things in a specific natural setting. Plants, animals, insects, microorganisms, rocks, soil, water and sunlight are major components of many ecosystems. All types of ecosystems fall into one of two categories: terrestrial or aquatic. Terrestrial ecosystems are land-based, while aquatic are water-based. The major types of ecosystems are forests, grasslands, deserts, tundra, freshwater and marine. The word “biome” may also be used to describe terrestrial ecosystems which extend across a large geographic area, such as tundra. Keep in mind, however, that within any ecosystem, specific features vary widely – for instance, an oceanic ecosystem in the Caribbean Sea will contain vastly different species than an oceanic ecosystem in the Gulf of Alaska.
    By: Anne Miller vijayalaxmi Santosh Mhetre
    Thursday, May 27, 2021
    EDUCATION

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  • Play and Learn: Climate Kids
    https://www.nasa.gov/feature/nasa-helps-puerto-rico-prepare-for-saharan-dust-impacts/   NASA Helps Puerto Rico Prepare for Saharan Dust Impacts Puerto Rico now has an air quality warning system that provides three days of advance notice about potentially harmful dust that travels across the Atlantic Ocean from the Sahara Desert.   NASA Earth-observing satellite data have shown that dust can ride air currents for 6,000 miles or more, affecting air quality that can be hazardous to human health. The project is led by NASA-funded researcher Pablo Méndez-Lázaro.
    By: Sali Hamilton
    Thursday, May 27, 2021
    WATER
    +2
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  • Health6 Basic Methods Of Organic Farming 6 Basic Methods of Organic Farming
      Test article  : 6 Basic Methods of Organic Farming 1. Crop Diversity: Now a days a new practice has come into picture which is called -Polyculture- in which a variety of crops can be cultivated simultaneously just to meet the increasing demand of crops. Unlike the ancient practice which was -Monoculture- in which only one type of crop was cultivated in a particular location.   2. Soil Management: After the cultivation of crops, the soil loses its nutrients and its quality depletes. Organic agriculture initiates the use of natural ways to increase the health of soil. It focuses on the use of bacteria that is present in animal waste which helps in making the soil nutrients more productive to enhance the soil.  3. Weed Management: -Weed-, is the unwanted plant that grows in agricultural fields. Organic agriculture pressurizes on lowering the weed rather than removing it completely.4. Controlling other organisms: There are both useful and harmful organisms in the agricultural farm which affect the field. The growth of such organisms needs to be controlled to protect the soil and the crops. This can be done by the use of herbicides and pesticides that contain less chemicals or are natural. Also, proper sanitization of the entire farm should be maintained to control other organisms.5. Livestock: Organic farming instigates domestic animals use to increase the sustainability of the farm.6. Genetic Modification: Genetic modification is kept away from this kind of agricultural set up because organic farming focuses on the use of natural ways and discourages engineered animals and plants.Disclaimer: The opinions expressed within this article are the personal opinions of the author. NDTV is not responsible for the accuracy, completeness, suitability, or validity of any information on this article. All information is provided on an as-is basis. The information, facts or opinions appearing in the article do not reflect the views of NDTV and NDTV does not assume any responsibility or liability for the same.COMMENTS 
    By: Sali Hamilton
    Thursday, May 27, 2021
    WATER
    +2
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  • Teaching methods
    The classroom is a dynamic environment, bringing together students from different backgrounds with various abilities and personalities. Being an effective teacher therefore requires the implementation of creative and innovative teaching strategies in order to meet students’ individual needs. Whether you’ve been teaching two months or twenty years, it can be difficult to know which teaching strategies will work best with your students. As a teacher there is no ‘one size fits all’ solution, so here is a range of effective teaching strategies you can use to inspire your classroom practice.
    By: Anne Miller vijayalaxmi Santosh Mhetre
    Thursday, May 27, 2021
    EDUCATION

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