12-November-2023: 17a-methyl Testosterone: A Growth Promoter for Xiphophorus Helleri, Environmental DNA (eDNA)

12 November 2023

• Success Story: 17a-methyl Testosterone: A Growth Promoter for Xiphophorus Helleri (Swordtail)

  The habit of keeping ornamental fish in aquariums for display and entertainment dates back. People kept vibrant tropical fish as a hobby in aquariums and garden ponds. Because of their vibrant body colors, unique morphologies, and eating habits, ornamental fish are living jewels. Fisheries is one of the major sources of animal protein for human consumption.  Consequently, the raising and development of freshwater fish in aquaculture has received a great deal of focus. Various biological processes, including immunological responses, circadian rhythms, reproduction in vertebrates, sex differentiation, metabolism, immune system function, and stress response, are regulated by steroid hormones.

• Highlights for Samvat 2080 - Sensex Surges by 355 Points, Nifty Reaches 19,525

  Diwali Mahurat Trading for Samvat 2080 has been recorded as one of the best muhurat tradings over the past few years. The muhurat trading time in 2023 was from 6:15 pm to 7:15 pm. Last year, the BSE and NSE were open between 6:15 pm and 7:15 pm on October 24 for Muhurat trade. The BSE Sensex ended the session with a gain of 355 points, which is 0.55%, at 65,259. The Nifty closed with a gain of 100 points, which is 0.52%, at 19,525.

• Environmental DNA (eDNA) is a Potent Technique for Aquatic Biodiversity Conservation

  Environmental DNA (eDNA), is a cutting-edge technique for researching biodiversity in any kind of habitat. Trawls, seines, tissue samples, and ocular surveys are the mainstays of traditional methods of assessing fish stocks. These techniques are expensive, time-consuming, intrusive, damaging to the environment, and prone to misidentification. Enhancing the baseline of ecological data and utilizing more economical, sensitive, non-invasive, and efficient techniques for evaluating ecosystems are crucial. eDNA metabarcoding is a non-invasive technique that uses the genetic traces that animals release into the environment to find and identify uncommon and endangered species in a range of habitats, including aquatic ones.