Although the pupation behavior of blowflies has been widely studied, this preliminary study was done on the vertical dispersal behavior (both ascending and descending) and fly emergence rate of third instar larvae of Chrysomya megacephala (Fabricius) to evaluate weather immature stages of blowflies survive burial and emerge out as adult. Third instar larvae of Chrysomya megacephala were placed at three different depths (5 cm, 25 cm and 45 cm) of soil under laboratory conditions to determine the impact of soil depth on the ascending and descending vertical dispersal behavior and the subsequent emergence of adults. The results of this study, although preliminary, but valuable to the field of forensic entomology because they provide new information about both ascending and descending vertical dispersal behavior of Chrysomya megacephala forensically important species of blowfly. In all the cases, maximum number of pupae recovered at the depth of 0 to 5 cm are 35.5 ± 4.5, 34 ± 1, 25 ± 5, when food was located at 5 cm, 25 cm and 45 cm depth respectively. This means that maximum no of larvae reached to the depth of 0 to 5 cm by ascending dispersal irrespective of at which depth they are placed. Paramount pupae were recovered from shallow burial depth of 0–5 cm in ascending dispersal and showed highest eclosion success i.e. 90.1% followed by 25 cm and 45 cm i.e. 71.7% and 55% respectively. While the number of pupae recovered as well as eclosion success was less in descending dispersal with an average of 62.8%, 39.25% and 33.9% at depths of 5, 25 and 45 cm respectively. This manifest if larvae disperse ascendingly, it increases their chance of survival.
1 July 2021 in Saudi Journal of Biological Sciences
Reproductive drugs that include contraceptive and fertility drugs are used to manage reproductive health in both humans and animals. Contraceptive drugs are mainly used by humans for reversible contraception whereas fertility drugs are mainly used in animals to increase milk production, poultry products and meat production. Usage of these drugs has increased manifold in the last decade. These drugs are excreted through body fluids (mainly urine and milk) that lead to contamination of surface water, milk and animal produce. Consumption of such contaminated products or water results in reproductive disorders and different types of cancers in humans. This questionnaire-based study was designed and conducted involving gynecologists, pharmacies, medical stores and veterinarians in Patiala city and its adjoining areas in India to evaluate the quantitative and qualitative aspects of use of these drugs. A total of 150 survey points were identified with random sampling method. Data was analyzed using appropriate statistical tools. The results showed that contraceptive drugs constitute 86% of reproductive drugs usage in humans. Further, steroidal contraceptives constitute a huge 94.7% share of contraceptive drugs, and of these combined oral contraceptives have 79.79% share among which a combination is ethinylestradiol and levonorgestrel is the most popular (20.92%). The consumption of COCs is higher than that of progestin only pills (Z = 3.39) as well as estrogen only pills (Z = 4.30). In contrast, usage of non-hormonal fertility drugs (89%) dominates over the hormonal class (11%) in humans. The most widely used non-hormonal fertility drug is clomiphene citrate (73.87%). In animals, the prescription rate of hormonal fertility drugs is higher (83%) than the non-hormonal one, where in the most widely prescribed drug is buserelin acetate. These findings are in consonance with the similar studies carried out in US, Europe and Canada which suggest that reproductive drugs usage pattern is more or less similar across the globe. A careful control to discourage indiscriminate use of such drugs is the need of hour to prevent damage of environment and ultimately to the health of living beings.
19 February 2018 in Journal of Forensic Sciences & Criminal Investigation
The terminal rooted cuttings of chrysanthemum cv. Bindiya were exposed to 0, 10, 20 and 30 Gy doses of γ-rays and planted in earthen pots (8”). Each treatment consists of three replications with 25 treated cuttings each. LD50 dose was determined as 30 Gy dose. Among the irradiated population, the highest plant survival (82.03%), No. of branches (4.18), minimum days to bud initiation (82.36 days) with early opening of lowering (120.36 days) was observed with 10 Gy dose. Morphological abnormalities such as fused leaves, with lower levels of chlorophyll were observed at higher dose (30 Gy). Marked variations were recorded between the mutated and control populations. The original flower colour of Bindiya is red and flower colour mutants were of nearest shades of red group 44 C, 46 C and red group 46 B as per RHS Colour Chart and isolated from plants irradiated with 10 and 20 Gy doses of gamma rays. The ray florets were normal in control whereas, ray florets were spoon shaped, tubular and irregular in induced variants. These mutants were multiplied on a large-scale and evaluated for their stability. This study developed a mutagenesis protocol that could be used to develop novel colour mutants in chrysanthemum.