Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization
The long fin pilot whale (Globicephala melas) and the false killer whale (Pseudorca crassidens) are two social delphinid species that travel in big groups and have strong matrilineal associations. Previous studies found low levels of genetic diversity in both species. Here, we use mitochondrial DNA...
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2021
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ftunivlosandes:oai:repositorio.uniandes.edu.co:1992/51250 2023-11-12T04:20:16+01:00 Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization Bohórquez Romero, Laura Caballero Gaitán, Susana 2021 25 hojas application/pdf http://hdl.handle.net/1992/51250 eng eng Universidad de los Andes Biología Facultad de Ciencias Departamento de Biología http://hdl.handle.net/1992/51250 23762.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores. http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess http://purl.org/coar/access_right/c_abf2 Ballena asesina falsa-Investigaciones Ballena asesina falsa-Habitat-Investigaciones Genútica de población-Investigaciones Cetáceos-Investigaciones Biología Trabajo de grado - Pregrado info:eu-repo/semantics/bachelorThesis info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_7a1f http://purl.org/coar/version/c_ab4af688f83e57aa Text http://purl.org/redcol/resource_type/TP 2021 ftunivlosandes 2023-10-28T16:58:40Z The long fin pilot whale (Globicephala melas) and the false killer whale (Pseudorca crassidens) are two social delphinid species that travel in big groups and have strong matrilineal associations. Previous studies found low levels of genetic diversity in both species. Here, we use mitochondrial DNA (mtDNA) control region sequences and genotypes from seven nuclear DNA (nucDNA) microsatellite loci, to examine the genetic diversity and population structure of both species from skin samples collected around New Zealand waters. We also analyze the presence of a possible hybrid between G.melas and other delphinids, using genetic and photographic evidence. In concordance with previous studies, relatively low levels genetic diversity were found for both species. We described a new G.melas control region haplotype, unique to the Bay of islands location (BOI) in New Zealand and found significant differentiation between the BOI location and a different New Zealand location from a previous study. All P.crassidens control region sequences obtained in this study corresponded to a previously defined haplotype from the South Pacific. Morphological differences between G.melas and the possible hybrid individuals were observed, however, no genetic evidence of hybridization between G.melas and P.crassidens was found. The sample corresponding to the possible hybrid was identified as Globicephala macrorhynchus based on mitochondrial DNA. Our findings indicate that in the North Island of New Zealand, the distribution of both pilot whale species can eventually overlap. Further analysis must be performed to confirm if this case could be a hybridization event between G.melas and G.macrorhychus. La ballena piloto de aleta larga (Globicephala melas) y la falsa orca (Pseudorca crassidens), son especies que viajan en grandes grupos y tienen fuertes asociaciones matrilineales. Estudios anteriores encontraron bajos niveles de diversidad genética en estas especies. En el presente estudio, se utilizaron secuencias de la región control del ADN ... Bachelor Thesis Killer Whale Orca ballena asesina Repositorio institucional Séneca Bajos ENVELOPE(-56.317,-56.317,-63.467,-63.467) Falsa ENVELOPE(-60.366,-60.366,-62.716,-62.716) Larga ENVELOPE(-60.767,-60.767,-62.467,-62.467) New Zealand Pacific |
institution |
Open Polar |
collection |
Repositorio institucional Séneca |
op_collection_id |
ftunivlosandes |
language |
English |
topic |
Ballena asesina falsa-Investigaciones Ballena asesina falsa-Habitat-Investigaciones Genútica de población-Investigaciones Cetáceos-Investigaciones Biología |
spellingShingle |
Ballena asesina falsa-Investigaciones Ballena asesina falsa-Habitat-Investigaciones Genútica de población-Investigaciones Cetáceos-Investigaciones Biología Bohórquez Romero, Laura Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
topic_facet |
Ballena asesina falsa-Investigaciones Ballena asesina falsa-Habitat-Investigaciones Genútica de población-Investigaciones Cetáceos-Investigaciones Biología |
description |
The long fin pilot whale (Globicephala melas) and the false killer whale (Pseudorca crassidens) are two social delphinid species that travel in big groups and have strong matrilineal associations. Previous studies found low levels of genetic diversity in both species. Here, we use mitochondrial DNA (mtDNA) control region sequences and genotypes from seven nuclear DNA (nucDNA) microsatellite loci, to examine the genetic diversity and population structure of both species from skin samples collected around New Zealand waters. We also analyze the presence of a possible hybrid between G.melas and other delphinids, using genetic and photographic evidence. In concordance with previous studies, relatively low levels genetic diversity were found for both species. We described a new G.melas control region haplotype, unique to the Bay of islands location (BOI) in New Zealand and found significant differentiation between the BOI location and a different New Zealand location from a previous study. All P.crassidens control region sequences obtained in this study corresponded to a previously defined haplotype from the South Pacific. Morphological differences between G.melas and the possible hybrid individuals were observed, however, no genetic evidence of hybridization between G.melas and P.crassidens was found. The sample corresponding to the possible hybrid was identified as Globicephala macrorhynchus based on mitochondrial DNA. Our findings indicate that in the North Island of New Zealand, the distribution of both pilot whale species can eventually overlap. Further analysis must be performed to confirm if this case could be a hybridization event between G.melas and G.macrorhychus. La ballena piloto de aleta larga (Globicephala melas) y la falsa orca (Pseudorca crassidens), son especies que viajan en grandes grupos y tienen fuertes asociaciones matrilineales. Estudios anteriores encontraron bajos niveles de diversidad genética en estas especies. En el presente estudio, se utilizaron secuencias de la región control del ADN ... |
author2 |
Caballero Gaitán, Susana |
format |
Bachelor Thesis |
author |
Bohórquez Romero, Laura |
author_facet |
Bohórquez Romero, Laura |
author_sort |
Bohórquez Romero, Laura |
title |
Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
title_short |
Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
title_full |
Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
title_fullStr |
Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
title_full_unstemmed |
Mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
title_sort |
mitochondrial population structure of false killer whales (pseudorca crassidens) and pilot whales (globicephala melas) around new zealand waters, genetic diversity and initial evidence of hybridization |
publisher |
Universidad de los Andes |
publishDate |
2021 |
url |
http://hdl.handle.net/1992/51250 |
long_lat |
ENVELOPE(-56.317,-56.317,-63.467,-63.467) ENVELOPE(-60.366,-60.366,-62.716,-62.716) ENVELOPE(-60.767,-60.767,-62.467,-62.467) |
geographic |
Bajos Falsa Larga New Zealand Pacific |
geographic_facet |
Bajos Falsa Larga New Zealand Pacific |
genre |
Killer Whale Orca ballena asesina |
genre_facet |
Killer Whale Orca ballena asesina |
op_relation |
http://hdl.handle.net/1992/51250 23762.pdf instname:Universidad de los Andes reponame:Repositorio Institucional Séneca repourl:https://repositorio.uniandes.edu.co/ |
op_rights |
Al consultar y hacer uso de este recurso, está aceptando las condiciones de uso establecidas por los autores. http://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess http://purl.org/coar/access_right/c_abf2 |
_version_ |
1782336311621844992 |