Hybridization between a Hawksbil turtle (Eretmochelys imbricata) and an Olive Ridley turtle (Lepidochelys olivacea) revealed by mitochondrial DNA analysis (Record no. 9608)
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| 000 -LEADER | |
|---|---|
| fixed length control field | nam a22 7a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20181229170225.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 181214b xxu||||| |||| 00| 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | NARA |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 17864 |
| Personal name | Herath, D.R. |
| 245 ## - TITLE STATEMENT | |
| Title | Hybridization between a Hawksbil turtle (Eretmochelys imbricata) and an Olive Ridley turtle (Lepidochelys olivacea) revealed by mitochondrial DNA analysis |
| 260 ## - PUBLISHER, DISTRIBUTION, ETC. | |
| Date of publication, distribution, etc. | 2008, |
| Place of publication, distribution, etc. | Sri Lanka, |
| Name of publisher, distributor, etc. | Sri Lanka Association for Fisheries and Aquatic Resources, |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 01p. |
| 440 ## - SERIES STATEMENT/ADDED ENTRY--TITLE | |
| 9 (RLIN) | 17869 |
| Title | Proceeding of the 14th Sessions of the Sri Lanka Association for Fisheries and Aquatic Resources- 2008 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Molecular genetic techniques have been useful in studying natural hybridization in marine turtles. As morphological features by themselves are inadequate in the determination of hybridization, mitochondrial DNA analysis has been commonly used for the study of hybrid turtles. Hybridizations have been detected and reported using these methods among almost all the species in the family Cheloniidae.<br/>Five turtles from a clutch of turtles hatched in a Kosgoda turtle hatchery in 1996 were believed to be hybrids due to the presence of intermediate features. Considering these morphological features it had been believed at that time that they were hybrids between a Hawksbill turtle (Eretmochelys imbricata) and a Green turtle (Chelonia mydas). As four of these hybrid turtles had been killed during the tsunami in 2004, only one hybrid turtle was available for this study.<br/>The morphological features of a Hawksbill turtle observed in this particular turtle, were the possession of 2 pairs of prefrontal scutes and the presence of 4 infra marginal scutes without pores. Though the central scutes were imbricated, the marginal scutes were not very clearly imbricated. The presence of a curved beak with a distinct overbite, a characteristic feature of Hawksbill turtles, was not observed in this specimen.<br/>Mitochondrial DNA analysis was carried out to confirm hybridization. The four species of turtles commonly found in Sri Lanka, Green turtle (Chelonia mydas), Loggerhead turtle (Caretta caretta), Hawksbill .turtle (Eretmochelys imbricata) and Olive Ridley turtle (Lepidochelys olivacea), were used to determine the origin of the hybrid turtle. The results showed that the four species of turtles cluster together in their own separate clades and that the hybrid turtle clusters with the Olive Ridley turtle specimens.<br/>As mitochondrial DNA has a maternal origin and as some morphological features characteristic of a Hawksbill turtle were observed, it could be inferred that the hybrid is a progeny of a female Olive Ridley turtle and a male Hawksbill Turtle. This proves that this hybrid turtle is not a result of a cross between a Hawksbill turtle and a Green turtle, a conclusion that had been reached using only its morphological features. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 17866 |
| Personal name | Ranmadugala, D.N.A. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 17868 |
| Personal name | Jayathilake, R.A.M. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| 9 (RLIN) | 17867 |
| Personal name | Gunawardena, M.G.K. |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Research Papers |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Inventory number | Total Checkouts | Barcode | Date last seen | Copy number | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NARA Main Library | NARA Main Library | Ready Reference | 06.08.2009 | RP0017 | RP0017 | 29.12.2018 | RP0017 | 06.08.2009 | Research Papers |