A Tale of Two Aggregations: Kinship and Population Genetics of Whale Sharks (Rhincodon typus) at Shib Habil, Saudi Arabia, and Mafia Island, Tanzania.

Handle URI:
http://hdl.handle.net/10754/583816
Title:
A Tale of Two Aggregations: Kinship and Population Genetics of Whale Sharks (Rhincodon typus) at Shib Habil, Saudi Arabia, and Mafia Island, Tanzania.
Authors:
Hardenstine, Royale ( 0000-0003-4693-7045 )
Abstract:
In a recent global study of whale shark population genetics, aggregations were found to belong to either the Indo-Pacific or Atlantic population. This overview included an aggregation found within the Red Sea near Al Lith, Saudi Arabia, however the Mafia Island, Tanzania, aggregation was not part of the study. Both aggregations have unique aspects with the Saudi Arabian individuals showing sexual parity with no segregation, while recent acoustic results have revealed cryptic residency at Mafia Island. Genetic analysis using 11 microsatellite markers was performed on whale sharks from both locations. A combination of primers sourced from previous studies and newly designed primers were used to compare both aggregations and the individuals within. Samples were collected in the Red Sea for 5 seasons spanning 6 years, and for 2 seasons in Tanzania. Analysis with STRUCTURE showed a lack of significant genetic differences between the two aggregations, confirming that whale sharks in Tanzania are part of the Indo-Pacific population. Kinship analysis using COLONY found two potential pairs of full siblings in Tanzania. One pair had a high probability (.993) of being a full sibling dyad while the other had a lower probability (.357). There were no sibling pairs identified from the Red Sea aggregation. Genetic diversity was investigated using allelic richness over the 6 seasons at Al Lith, with values showing no significant change. This is in contrast to results that showed a decline in genetic diversity at Western Australia’s Ningaloo reef. These differences, however, only highlight the need for genetic diversity studies over longer time periods and at other aggregations within the Indo-Pacific.
Advisors:
Berumen, Michael L. ( 0000-0003-2463-2742 )
Committee Member:
Duarte, Carlos M. ( 0000-0002-1213-1361 ) ; Gojobori, Takashi
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Marine Science Program
Program:
Marine Science
Issue Date:
Dec-2015
Type:
Thesis
Appears in Collections:
Marine Science Program; Theses; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.advisorBerumen, Michael L.en
dc.contributor.authorHardenstine, Royaleen
dc.date.accessioned2015-12-13T06:09:22Zen
dc.date.available2015-12-13T06:09:22Zen
dc.date.issued2015-12en
dc.identifier.urihttp://hdl.handle.net/10754/583816en
dc.description.abstractIn a recent global study of whale shark population genetics, aggregations were found to belong to either the Indo-Pacific or Atlantic population. This overview included an aggregation found within the Red Sea near Al Lith, Saudi Arabia, however the Mafia Island, Tanzania, aggregation was not part of the study. Both aggregations have unique aspects with the Saudi Arabian individuals showing sexual parity with no segregation, while recent acoustic results have revealed cryptic residency at Mafia Island. Genetic analysis using 11 microsatellite markers was performed on whale sharks from both locations. A combination of primers sourced from previous studies and newly designed primers were used to compare both aggregations and the individuals within. Samples were collected in the Red Sea for 5 seasons spanning 6 years, and for 2 seasons in Tanzania. Analysis with STRUCTURE showed a lack of significant genetic differences between the two aggregations, confirming that whale sharks in Tanzania are part of the Indo-Pacific population. Kinship analysis using COLONY found two potential pairs of full siblings in Tanzania. One pair had a high probability (.993) of being a full sibling dyad while the other had a lower probability (.357). There were no sibling pairs identified from the Red Sea aggregation. Genetic diversity was investigated using allelic richness over the 6 seasons at Al Lith, with values showing no significant change. This is in contrast to results that showed a decline in genetic diversity at Western Australia’s Ningaloo reef. These differences, however, only highlight the need for genetic diversity studies over longer time periods and at other aggregations within the Indo-Pacific.en
dc.language.isoenen
dc.subjectKinshipen
dc.subjectMicrosatellitesen
dc.subjectRhincodon typusen
dc.subjectSharksen
dc.subjectRed Seaen
dc.subjectPopulation Geneticsen
dc.titleA Tale of Two Aggregations: Kinship and Population Genetics of Whale Sharks (Rhincodon typus) at Shib Habil, Saudi Arabia, and Mafia Island, Tanzania.en
dc.typeThesisen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentMarine Science Programen
thesis.degree.grantorKing Abdullah University of Science and Technologyen_GB
dc.contributor.committeememberDuarte, Carlos M.en
dc.contributor.committeememberGojobori, Takashien
thesis.degree.disciplineMarine Scienceen
thesis.degree.nameMaster of Scienceen
dc.person.id133280en
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