http://localhost:8080/xmlui/handle/123456789/782 2026-06-13T04:46:43Z http://localhost:8080/xmlui/handle/123456789/799 Meiofaunal diversity of puthuvypu beach, Vypin Jalal, Aliya; Dr.Priyalakshmi G. (Guided by) The marine environment has two major provinces viz; benthic and pelagic. Pelagic environment mainly consists of plankton and nekton, however, the benthic community consists of sessile forms. The benthic organisms are classified based on their size, as Macrofauna (>0.5mm), Meiofauna (0.5 to 0.063mm) and Microfauna (<0.063mm). The meiofauna for its small size, short life span, absence of planktonic stages, sensitive to the natural, anthropogenic, and environmental disturbance, has been identified as an important member of the benthic community ie., converting the energy from basic to higher trophic levels. Since it is sensitive to the environment, abundance and diversity of these in the environment is considered as a yardstick to measure the health.The diversity study of meiofauna of this area, using sampling techniques was done as part of my project. Various meiofaunal groups have been found which revealed the diversity of the Puthuvypu beach. The groups which I studied were ARCHIANNELDA, NEMATODA, POLYCHAETA, OLIGOCHAETA, OSTRACODA, COPEPODA, and HALACAROIDEA. Environmental factors including temperature, salinity, dissolved oxygen and pH of the water are estimated. The diversity of meiofaunal groups along the coastal areas of Kerala and India are reviewed. Problems affecting the diversity of meiofauna like pollution, trawling is also reviewed. 2020-03-31T00:00:00Z http://localhost:8080/xmlui/handle/123456789/798 Effects of three natural repellents – garlic, lemon and bay leaves on cockroach T.N, Anagha; Dr.Simi Joseph P. (Guided by) he present investigation was aimed to assess the impact of indigenous plant products for their insecticidal and repellent activity against Periplanata americana. An attempt was undertaken to evaluate the efficiency of three plant products- Citrus limon (lemon), Allium sativum (garlic) and Laurus nobilis (bay leaves), owing to their insecticidal properties. Each of the plant material (PM) was pulverized and then applied on P.americana in three different concentrations. Dosages administered were 10 ml, 20ml and 30ml respectively. The results have shown that lemon was the most effective among the three natural cockroach repellents tested and it would be an excellent alternative to synthetic insectides. All the three experimented plant products showed maximum repellency in their highest concentration. But the study was not conducted further since 100 % mortality was shown in 30 ml Lemon spray. The results of the present study would provide more knowledge and information about lemon as natural repellent. Additionally, this study will produce significant and relevant information for future studies regarding to this potent insect repellent. 2020-03-31T00:00:00Z http://localhost:8080/xmlui/handle/123456789/797 The preliminary study on diversity of moths in bharata mata college thrikkakara, kalamassery municipality Shaji, Fathima; Aswini Venugopal (Guided by) Arthropods are considered as the most successful animal group which consists of more than two-third of all animal species on earth. Class Insecta comprise about 90% of tropical forest biomass (Fatimah & Catherine 2002). Order Lepidoptera is the most diverse and second largest in class Insecta (Benton, 1995). Moths constitute the sub-order Heterocera of order Lepidoptera that has important roles in the forest ecosystem as herbivores and as food for predatory and parasitic species (Sivasanakaran K. et al. 2011). The present study was conducted at K M to evaluate the biodiversity of moths. During the present study, a total of 17 moth specimens were collected from the study area which represented a total of 5 Families distributed among 11 Genera and 13 Species. The highest species richness was shown by the family Erebidae and the least by the family Geometridae. The results of this preliminary study are promising; it sheds light on the unknown biodiversity of KM which needs to be strengthened through comprehensive future survey. This work help in future to conduct a moth diversity study easily and also help to find out the extinct, extant and threatened species in that particular area. 2020-03-31T00:00:00Z http://localhost:8080/xmlui/handle/123456789/796 A study on the hymenopteran diversity with special Reference to ants (formicidae) of kalamassery Municipality Jismi Jose,; Dr. Sherin Antony (Guided by) Ants are the most abundant and ecological significant organism on earth. They are the highly developed social insects. Present study deals with the diversity of ants in Kalamassery municipality, Kerala. It is a most populated municipality in kanayannur sub district. The main objective of the study was to collect ants from different sites and to study about their diversity. Ants were collected from different sites of kalamassery using all out search method, bait method, brush method, pit fall trap, hand collection and opportunistic method. The photographs of different ants were also taken. 20 species were collected from this region and are identified with the help of Rabeesh T P research scholar, Department of zoology, St. Xaviers college, Aluva. Among the subfamilies reported from the study area formicinae was dominant with 9 species followed by myrmicinae and ponerinae with 5 species and dolichoderinae with 1 species. The diversity is poor in Kalamassery due to high use of chemicals, varying climatic conditions, deforestation and urbanization. This study helps to know more about ant diversity at present and can compare it with the future. By increasing the biodiversity ant diversity can be increased in the study areas. 2020-03-31T00:00:00Z