Pathogenesity of Thai Sacbrood Virus to the Ecotypes of Apis Cerana Indica Fab. in Kerala (Record no. 26167)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 03917nam a2200181Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220826135238.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 140128s9999 xx 000 0 und d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 632.6 |
| Item number | DEV/PA |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Devanesan S |
| 245 ## - TITLE STATEMENT | |
| Title | Pathogenesity of Thai Sacbrood Virus to the Ecotypes of Apis Cerana Indica Fab. in Kerala |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellayani |
| Name of publisher, distributor, etc. | Department of Agricultural Entomology, College of Agriculture |
| Date of publication, distribution, etc. | 1998 |
| 502 ## - DISSERTATION NOTE | |
| Degree type | PhD |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Identification of ecotypes of the Indian bee A. cerana indica Fab. <br/>in different ecological niche in Kerala adopting statistical analysis of <br/>the morphometric data was attempted in the investigation. Sixty worker <br/>bees each were collected from 18 locations distributed throughout Kerala <br/>and data on 50 selected characters were collected. Univariate analysis <br/>showed significant variations in the data with reference to all the fifty <br/>characters indicating the desirability of a multivariate analysis for <br/>identifying sub groups of A. cerana indica available in the state. <br/>A comparison of the honeybee population of the three topographic <br/>divisions of the state viz., highrange, highland and midland, with reference <br/>to each morphometric character revealed that the bees from highrange <br/>were distinct from those of highland and midland. There was less <br/>distinction between the bees of the latter two divisions. It also indicated <br/>that the highrange bees possessed longer proboscis, antennae, wings and <br/>legs. The abdominal size also showed an increasing trend in highland and <br/>highrange bees. <br/>Eleven morphometric characters were positively correlated with <br/>altitude while seven characters showed negative correlation. <br/> <br/><br/>Multivariate(discriminant) analysis of the morphometric data <br/>revealed the existence of four different clusters / ecotypes in A. cerana indica <br/>populations of Kerala. Cluster I included all the six locations of midland <br/>and four locations of highland. Two locations of highland at higher altitude <br/>formed cluster 11. Pampadumpara of the highest altitude in highrange came <br/>in cluster IV and remaining locations of the highrange constituted cluster <br/>Ill. <br/>Contribution of each morphometric character towards divergence <br/>of the clusters was also assessed. Seventeen characters contributing 2.5 <br/>to 6.4 per cent of divergence were thus identified. <br/>Bees from all the four clusters / ecotypes showed susceptibility to <br/>Thai Sacbrood Virus (TSBV) infection. <br/>Studies on the pathogenicity of TSBV showed that all four larval <br/>instars of A. cerana indica were susceptible to TSBV. One day old larvae <br/>were highly susceptible recording 100 per cent mortality closely followed <br/>by 2 and 3 day old larvae showing 84 to 92 and 82 to 96 per cent mortality <br/>respectively, with an incubation period of 3-4 days. Four day old larvae <br/>were comparatively less susceptible recording 72 to 74 per cent mortality <br/>with an incubation period of 3 to 5 days. <br/>The infected larvae were seen lying on the floor of the brood cells <br/>on their back with the head directed outwards and turned upwards like the <br/> <br/><br/>prow of a boat. In later stages they became plumbier than healthy larvae. <br/>After death each larva showed a sac like appearance when lifted up and it <br/>was filled with a milky fluid formed probably by the histolysis of the tissues. <br/>In 10 to 15 days the sac got shrunk into a small browinish black scale <br/>\ " <br/>loosely lying at the floor of the' cell. The presence of diseased larvae was <br/>found to upset the behaviour of workers and queen. These resulted in the <br/>fast dwindling of the population and cessation of cleaning activities in the <br/>hive. The hive lost the desired qualities of a bee abode and hence the <br/>surviving bees deserted the same causing total loss to apiary. <br/> |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Abraham Jacob (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://krishikosh.egranth.ac.in/handle/1/5810084391">http://krishikosh.egranth.ac.in/handle/1/5810084391</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Theses |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
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| Dewey Decimal Classification | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 18/03/2014 | 632.6 DEV/PA | 171215 | 18/03/2014 | 18/03/2014 | Theses |