Fin whale (Balaenoptera physalus) mitogenomics: A cautionary tale of defining sub-species from mitochondrial sequence monophyly

Cabrera, Andrea A.; Hoekendijk, Jeroen; Aguilar, Àlex; Barco, Susan G.; Berrow, Simon; Bloch, Dorete; Borrell, Asunción; Cunha, Haydée A.; Rosa, Luciano Dalla; Dias, Carolina P.; Gauffier, Pauline; Hao, Wensi; Landry, Scott; Larsen, Finn; Martín, Vidal; Mizroch, Sally A.; Oosting, Tom; Øien, Nils; Pampoulie, Christophe; Panigada, Simone; Prieto, Rui; Ramp, Christian; Rivera-León, Vania E.; Robbins, Jooke; Ryan, Conor; Schall, Elena; Sears, Richard; Silva, Mónica; Urbán, Jorge; Wenzel, Frederick W.; Palsbøll, Per; Bérubé, Martine

doi:10.1016/j.ympev.2019.02.003

Cited by 15 publications

(29 citation statements)

References 56 publications

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“…Our expanded dataset also confirms previously described patterns of global fin whale differentiation (Archer et al, 2013(Archer et al, , 2019Cabrera et al, 2019). The three previously described fin whale maternal linages, each corresponding to an ocean basin (NA, NP + GoC, and SH) were also recovered in our phylogenetic analyses.…”

Section: Discussionsupporting

confidence: 86%

“…Additionally, Jiménez López et al (2019) presented evidence supporting previous findings that fin whales from the Gulf of California (GoC) are a small year-round resident population isolated from the rest of the NP (Bérubé et al, 2002;Urbán et al, 2005;Nigenda-Morales et al, 2008;Rivera-León et al, 2019). Genetic analyses between the Northern and Southern Hemisphere show a strong phylogeographic structure among NP, NA, and SH fin whale populations (Archer et al, 2013(Archer et al, , 2019Cabrera et al, 2019). However, the reduced sample size, restricted geographic coverage in the SH, and inability to positively associate morphological characteristics of putative pygmy fin whales with those sampled impeded the assessment of potential phylogeographic structure within this area and evaluation of the validity of the putative B. p. patachonica sub-species (Archer et al, 2013(Archer et al, , 2019.…”

Section: Introductionsupporting

confidence: 62%

“…Finally, 153 additional sequences from the NP (n = 92), GoC (n = 5), SEP (n = 1), Southern Ocean (n = 42), and NA (n = 13) were retrieved from the mitogenomes published by Archer et al (2013), one by Arnason et al (1991) (NA, n = 1), and another 8 sequences from Cabrera et al (2019) (NP, n = 1; NA, n = 7). Our final global dataset of 305 sequences was then stratified into four regions according to the geographic origin of samples: NP (n = 93), SH = 79 (SEP, n = 37 + Southern Ocean and two samples from the Indian Ocean, n = 42), GoC (n = 112), and NA (n = 21) (Figure 1).…”

Section: Sample Collection and Laboratory Proceduresmentioning

confidence: 99%

“…The eight mitogenome sequences from Cabrera et al (2019) were trimmed to our D-loop segment length of 624 bp, and included in the construction of the haplotype network and the phylogenetic tree. However, these samples were not used for the genetic diversity and structure analyses.…”

Section: Sample Collection and Laboratory Proceduresmentioning

confidence: 99%

“…Strong genetic differentiation was detected in the Northern Hemisphere, between whales of the North Pacific (NP) and North Atlantic (NA) (Bérubé et al, 1998;Archer et al, 2013;Cabrera et al, 2019). Based on new genetic evidence, Archer et al (2019) recently formally described fin whales in the North Pacific as a new subspecies, B. p. velifera, which was accepted by the Committee on Taxonomy (Taxonomy, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Contrasting Phylogeographic Patterns Among Northern and Southern Hemisphere Fin Whale Populations With New Data From the Southern Pacific

et al. 2021

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Four fin whale sub-species are currently considered valid: Balaenoptera physalus physalus in the North Atlantic, B. p. velifera in the North Pacific, B. p. quoyi and B. p. patachonica in the Southern Hemisphere. The last, not genetically validated, was described as a pygmy-type sub-species, found in low to mid latitudes of the Southern Hemisphere. Genetic analyses across hemispheres show strong phylogeographic structure, yet low geographic coverage in middle latitudes of the Southern Hemisphere impeded an assessment within the area, as well as evaluating the validity of B. p. patachonica. New mtDNA sequences from the Southeastern Pacific allowed an improved coverage of the species’ distribution. Our phylogenetic analyses showed three main lineages and contrasting phylogeographic patterns between Northern and Southern Hemispheres. Absence of recurrent female mediated gene flow between hemispheres was found; however, rare dispersal events revealing old migrations were noted. The absence of genetic structure suggests the existence of one single taxa within the Southern Hemisphere. Thus, until further evidence supporting this subspecies can be produced, such as genetic, ecological, behavioral, or morphological data, we propose that all fin whales from the Southern Hemisphere, including those from middle latitudes of the Southeastern Pacific belong to B. p. quoyi subspecies. This information is important for the current assessment of fin whales, contributing to the evaluation of the taxonomic classification and the conservation of the species.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionsupporting

confidence: 62%

Section: Sample Collection and Laboratory Proceduresmentioning

confidence: 99%

Section: Sample Collection and Laboratory Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contrasting Phylogeographic Patterns Among Northern and Southern Hemisphere Fin Whale Populations With New Data From the Southern Pacific

et al. 2021

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Phylogeography and demographic inference of the endangered sei whale, with implications for conservation

Pérez‐Álvarez

Rodríguez

Kraft

et al. 2021

Aquatic Conservation

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1. The sei whale (Balaenoptera borealis) presents a disjointed geographic distribution.Significant genetic divergence between sei whales from the North Atlantic (NA) and North Pacific (NP) have been recorded; however, limited samples from the Southern Hemisphere (SH) have precluded a global analysis.2. The largest recorded mass mortality event occurred in Golfo de Penas, southern Chile, providing a primary source of SH samples. A global mitochondrial DNA phylogeographic study was undertaken including 111 SH samples (98 from Golfo de Penas), and new sequences from the NP.3. A marked phylogeographic structure was observed between the three ocean basins' populations, with the highest Φ ST values between NA-NP and NA-SH, and a lower but still significant value between SH-NP. This structure, and the haplotype distribution pattern, suggest a more recent separation between SH-NP and an absence of recurrent gene flow among all three populations. Only one potential migratory event was detected from SH to NA. 4. These results support an ongoing phylogeographic differentiation between all populations, highlighting the identity of each and the importance of independent management. Therefore, each population should represent a separate management unit, which is important in the development of conservation strategies. Demographic analyses detected a recent reduction of population size in the SHand NA, but not in the NP. For all populations, estimated effective population sizes were higher than estimated census sizes. This suggests that most of the genetic diversity of pre-whaling populations is still retained; however, continued reduction in population sizes could lead to future loss of genetic diversity.6. This study highlights the necessity of local protection and systematic monitoring of the Golfo de Penas sei whale population. In such a remote area the use of remote sensing techniques could be a cost-effective option for evaluating the threat, periodicity and magnitude of mortalities and their effect on the local whale population. The integration of genetic and demographic approaches improves the understanding of the dynamics of populations, which is particularly useful in endangered species.

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Fin Whale Balaenoptera physalus (Linnaeus, 1758)

Víkingsson

Panigada

2021

Handbook of the Mammals of Europe

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Fin whale (Balaenoptera physalus) mitogenomics: A cautionary tale of defining sub-species from mitochondrial sequence monophyly

Cited by 15 publications

References 56 publications

Contrasting Phylogeographic Patterns Among Northern and Southern Hemisphere Fin Whale Populations With New Data From the Southern Pacific

Contrasting Phylogeographic Patterns Among Northern and Southern Hemisphere Fin Whale Populations With New Data From the Southern Pacific

Phylogeography and demographic inference of the endangered sei whale, with implications for conservation

Fin Whale Balaenoptera physalus (Linnaeus, 1758)

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