Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico
Bryde’s whales Balaenoptera edeni are the only year-round resident baleen whale species in the northern Gulf of Mexico (GOMx). The current population abundance estimate is 33 (CV 1.07) and the population is severely restricted in range. We characterized genetic diversity and phylogenetic relationshi...
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ftdoajarticles:oai:doaj.org/article:7000be3228144cfca2e6360e94bcf676 2023-05-15T15:36:58+02:00 Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico PE Rosel LA Wilcox 2014-07-01T00:00:00Z https://doi.org/10.3354/esr00606 https://doaj.org/article/7000be3228144cfca2e6360e94bcf676 EN eng Inter-Research https://www.int-res.com/abstracts/esr/v25/n1/p19-34/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr00606 https://doaj.org/article/7000be3228144cfca2e6360e94bcf676 Endangered Species Research, Vol 25, Iss 1, Pp 19-34 (2014) Zoology QL1-991 Botany QK1-989 article 2014 ftdoajarticles https://doi.org/10.3354/esr00606 2022-12-31T16:27:42Z Bryde’s whales Balaenoptera edeni are the only year-round resident baleen whale species in the northern Gulf of Mexico (GOMx). The current population abundance estimate is 33 (CV 1.07) and the population is severely restricted in range. We characterized genetic diversity and phylogenetic relationships of these whales to other members of the Bryde’s whale complex. We analyzed DNA sequence data from 3 mitochondrial DNA (mtDNA) and 9 nuclear genes, and examined 42 nuclear microsatellite loci for 21 Bryde’s whale samples collected in the GOMx and 2 from the western North Atlantic. mtDNA diversity was extremely low; only 2 haplotypes were found in the first 375 bp of the control region and no variability in cytb or cox1 genes was seen. Twenty-five microsatellite loci were monomorphic, 16 had 2 or 3 alleles, and 1 had 4 alleles. Most nuclear genes exhibited shared alleles across balaenopterid species. Phylogenetic reconstruction using the control region and all published Bryde’s whale sequences revealed that GOMx Bryde’s whale haplotypes are evolutionarily distinct from other members of the Bryde’s whale complex examined to date. Within the first 375 bp of the control region, we found 25-26 fixed differences between GOMx haplotypes and those from sei whales and the 2 recognized Bryde’s whale subspecies. The GOMx whales are as divergent as these subspecies and as species are from each other. The level of divergence suggests a unique evolutionary trajectory worthy of its own taxonomic standing. The small population size and markedly low genetic diversity raise conservation concern for this unique group of whales. Article in Journal/Newspaper baleen whale North Atlantic Directory of Open Access Journals: DOAJ Articles Endangered Species Research 25 1 19 34 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Zoology QL1-991 Botany QK1-989 |
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Zoology QL1-991 Botany QK1-989 PE Rosel LA Wilcox Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
topic_facet |
Zoology QL1-991 Botany QK1-989 |
description |
Bryde’s whales Balaenoptera edeni are the only year-round resident baleen whale species in the northern Gulf of Mexico (GOMx). The current population abundance estimate is 33 (CV 1.07) and the population is severely restricted in range. We characterized genetic diversity and phylogenetic relationships of these whales to other members of the Bryde’s whale complex. We analyzed DNA sequence data from 3 mitochondrial DNA (mtDNA) and 9 nuclear genes, and examined 42 nuclear microsatellite loci for 21 Bryde’s whale samples collected in the GOMx and 2 from the western North Atlantic. mtDNA diversity was extremely low; only 2 haplotypes were found in the first 375 bp of the control region and no variability in cytb or cox1 genes was seen. Twenty-five microsatellite loci were monomorphic, 16 had 2 or 3 alleles, and 1 had 4 alleles. Most nuclear genes exhibited shared alleles across balaenopterid species. Phylogenetic reconstruction using the control region and all published Bryde’s whale sequences revealed that GOMx Bryde’s whale haplotypes are evolutionarily distinct from other members of the Bryde’s whale complex examined to date. Within the first 375 bp of the control region, we found 25-26 fixed differences between GOMx haplotypes and those from sei whales and the 2 recognized Bryde’s whale subspecies. The GOMx whales are as divergent as these subspecies and as species are from each other. The level of divergence suggests a unique evolutionary trajectory worthy of its own taxonomic standing. The small population size and markedly low genetic diversity raise conservation concern for this unique group of whales. |
format |
Article in Journal/Newspaper |
author |
PE Rosel LA Wilcox |
author_facet |
PE Rosel LA Wilcox |
author_sort |
PE Rosel |
title |
Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
title_short |
Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
title_full |
Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
title_fullStr |
Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
title_full_unstemmed |
Genetic evidence reveals a unique lineage of Bryde’s whales in the northern Gulf of Mexico |
title_sort |
genetic evidence reveals a unique lineage of bryde’s whales in the northern gulf of mexico |
publisher |
Inter-Research |
publishDate |
2014 |
url |
https://doi.org/10.3354/esr00606 https://doaj.org/article/7000be3228144cfca2e6360e94bcf676 |
genre |
baleen whale North Atlantic |
genre_facet |
baleen whale North Atlantic |
op_source |
Endangered Species Research, Vol 25, Iss 1, Pp 19-34 (2014) |
op_relation |
https://www.int-res.com/abstracts/esr/v25/n1/p19-34/ https://doaj.org/toc/1863-5407 https://doaj.org/toc/1613-4796 1863-5407 1613-4796 doi:10.3354/esr00606 https://doaj.org/article/7000be3228144cfca2e6360e94bcf676 |
op_doi |
https://doi.org/10.3354/esr00606 |
container_title |
Endangered Species Research |
container_volume |
25 |
container_issue |
1 |
container_start_page |
19 |
op_container_end_page |
34 |
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1766367413928984576 |