Skip to content

Research at St Andrews

Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns

Research output: Contribution to journalArticle

DOI

Open Access permissions

Open

Standard

Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns. / Tavares, Sara B.; Samarra, Filipa I. P.; Pascoal, Sonia; Graves, Jeff A.; Miller, Patrick J. O.

In: Ecology and Evolution, Vol. 8, No. 23, 12.2018, p. 11900-11913.

Research output: Contribution to journalArticle

Harvard

Tavares, SB, Samarra, FIP, Pascoal, S, Graves, JA & Miller, PJO 2018, 'Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns' Ecology and Evolution, vol. 8, no. 23, pp. 11900-11913. https://doi.org/10.1002/ece3.4646

APA

Tavares, S. B., Samarra, F. I. P., Pascoal, S., Graves, J. A., & Miller, P. J. O. (2018). Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns. Ecology and Evolution, 8(23), 11900-11913. https://doi.org/10.1002/ece3.4646

Vancouver

Tavares SB, Samarra FIP, Pascoal S, Graves JA, Miller PJO. Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns. Ecology and Evolution. 2018 Dec;8(23):11900-11913. https://doi.org/10.1002/ece3.4646

Author

Tavares, Sara B. ; Samarra, Filipa I. P. ; Pascoal, Sonia ; Graves, Jeff A. ; Miller, Patrick J. O. / Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns. In: Ecology and Evolution. 2018 ; Vol. 8, No. 23. pp. 11900-11913.

Bibtex - Download

@article{ec372b18951a4c29a203e3c8b1013566,
title = "Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns",
abstract = "Local adaption through ecological niche specialization can lead to genetic structure between and within populations. In the Northeast Pacific, killer whales (Orcinus orca) of the same population have uniform specialized diets that are non‐overlapping with other sympatric, genetically divergent, and socially isolated killer whale ecotypes. However, killer whales in Iceland show intrapopulation variation of isotopic niches and observed movement patterns: some individuals appear to specialize on herring and follow it year‐round while others feed upon herring only seasonally or opportunistically. We investigated genetic differentiation among Icelandic killer whales with different isotopic signatures and observed movement patterns. This information is key for management and conservation purposes but also for better understanding how niche specialization drives genetic differentiation. Photo‐identified individuals (N = 61) were genotyped for 22 microsatellites and a 611 bp portion of the mitochondrial DNA (mtDNA) control region. Photo‐identification of individuals allowed linkage of genetic data to existing data on individual isotopic niche, observed movement patterns, and social associations. Population subdivision into three genetic units was supported by a discriminant analysis of principal components (DAPC). Genetic clustering corresponded to the distribution of isotopic signatures, mtDNA haplotypes, and observed movement patterns, but genetic units were not socially segregated. Genetic differentiation was weak (FST < 0.1), suggesting ongoing gene flow or recent separation of the genetic units. Our results show that killer whales in Iceland are not as genetically differentiated, ecologically discrete, or socially isolated as the Northeast Pacific prey‐specialized killer whales. If any process of ecological divergence and niche specialization is taking place among killer whales in Iceland, it is likely at a very early stage and has not led to the patterns observed in the Northeast Pacific.",
keywords = "Ecological niche, Genetic differentiation, Killer whales, Microsatellites, Orcinus orca, Population ecology",
author = "Tavares, {Sara B.} and Samarra, {Filipa I. P.} and Sonia Pascoal and Graves, {Jeff A.} and Miller, {Patrick J. O.}",
note = "Funding was provided by the Funda{\cc}{\~a}o para a Ci{\^e}ncia e a Tecnologia (grant number SFRH/BD/84714/2012) and a MASTS (The Marine Alliance for Science and Technology for Scotland) pooling initiative (grant reference SG188) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions to S.B.T. and the Icelandic Research Fund (Ranns{\'o}knasj{\'o}đur, grant number 120248042) to F.I.P.S.",
year = "2018",
month = "12",
doi = "10.1002/ece3.4646",
language = "English",
volume = "8",
pages = "11900--11913",
journal = "Ecology and Evolution",
issn = "2045-7758",
publisher = "John Wiley & Sons, Ltd.",
number = "23",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Killer whales (Orcinus orca) in Iceland show weak genetic structure among diverse isotopic signatures and observed movement patterns

AU - Tavares, Sara B.

AU - Samarra, Filipa I. P.

AU - Pascoal, Sonia

AU - Graves, Jeff A.

AU - Miller, Patrick J. O.

N1 - Funding was provided by the Fundação para a Ciência e a Tecnologia (grant number SFRH/BD/84714/2012) and a MASTS (The Marine Alliance for Science and Technology for Scotland) pooling initiative (grant reference SG188) funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions to S.B.T. and the Icelandic Research Fund (Rannsóknasjóđur, grant number 120248042) to F.I.P.S.

PY - 2018/12

Y1 - 2018/12

N2 - Local adaption through ecological niche specialization can lead to genetic structure between and within populations. In the Northeast Pacific, killer whales (Orcinus orca) of the same population have uniform specialized diets that are non‐overlapping with other sympatric, genetically divergent, and socially isolated killer whale ecotypes. However, killer whales in Iceland show intrapopulation variation of isotopic niches and observed movement patterns: some individuals appear to specialize on herring and follow it year‐round while others feed upon herring only seasonally or opportunistically. We investigated genetic differentiation among Icelandic killer whales with different isotopic signatures and observed movement patterns. This information is key for management and conservation purposes but also for better understanding how niche specialization drives genetic differentiation. Photo‐identified individuals (N = 61) were genotyped for 22 microsatellites and a 611 bp portion of the mitochondrial DNA (mtDNA) control region. Photo‐identification of individuals allowed linkage of genetic data to existing data on individual isotopic niche, observed movement patterns, and social associations. Population subdivision into three genetic units was supported by a discriminant analysis of principal components (DAPC). Genetic clustering corresponded to the distribution of isotopic signatures, mtDNA haplotypes, and observed movement patterns, but genetic units were not socially segregated. Genetic differentiation was weak (FST < 0.1), suggesting ongoing gene flow or recent separation of the genetic units. Our results show that killer whales in Iceland are not as genetically differentiated, ecologically discrete, or socially isolated as the Northeast Pacific prey‐specialized killer whales. If any process of ecological divergence and niche specialization is taking place among killer whales in Iceland, it is likely at a very early stage and has not led to the patterns observed in the Northeast Pacific.

AB - Local adaption through ecological niche specialization can lead to genetic structure between and within populations. In the Northeast Pacific, killer whales (Orcinus orca) of the same population have uniform specialized diets that are non‐overlapping with other sympatric, genetically divergent, and socially isolated killer whale ecotypes. However, killer whales in Iceland show intrapopulation variation of isotopic niches and observed movement patterns: some individuals appear to specialize on herring and follow it year‐round while others feed upon herring only seasonally or opportunistically. We investigated genetic differentiation among Icelandic killer whales with different isotopic signatures and observed movement patterns. This information is key for management and conservation purposes but also for better understanding how niche specialization drives genetic differentiation. Photo‐identified individuals (N = 61) were genotyped for 22 microsatellites and a 611 bp portion of the mitochondrial DNA (mtDNA) control region. Photo‐identification of individuals allowed linkage of genetic data to existing data on individual isotopic niche, observed movement patterns, and social associations. Population subdivision into three genetic units was supported by a discriminant analysis of principal components (DAPC). Genetic clustering corresponded to the distribution of isotopic signatures, mtDNA haplotypes, and observed movement patterns, but genetic units were not socially segregated. Genetic differentiation was weak (FST < 0.1), suggesting ongoing gene flow or recent separation of the genetic units. Our results show that killer whales in Iceland are not as genetically differentiated, ecologically discrete, or socially isolated as the Northeast Pacific prey‐specialized killer whales. If any process of ecological divergence and niche specialization is taking place among killer whales in Iceland, it is likely at a very early stage and has not led to the patterns observed in the Northeast Pacific.

KW - Ecological niche

KW - Genetic differentiation

KW - Killer whales

KW - Microsatellites

KW - Orcinus orca

KW - Population ecology

U2 - 10.1002/ece3.4646

DO - 10.1002/ece3.4646

M3 - Article

VL - 8

SP - 11900

EP - 11913

JO - Ecology and Evolution

T2 - Ecology and Evolution

JF - Ecology and Evolution

SN - 2045-7758

IS - 23

ER -

Related by author

  1. Assessing cetacean body condition: is total lipid content in blubber biopsies a useful monitoring tool?

    Kershaw, J. L., Brownlow, A., Ramp, C. A., Miller, P. J. O. & Hall, A. J., 6 Sep 2019, In : Aquatic Conservation: Marine and Freshwater Ecosystems. 29, S1, p. 271-282 12 p.

    Research output: Contribution to journalArticle

  2. Evidence for discrimination between feeding sounds of familiar fish and unfamiliar mammal-eating killer whale ecotypes by long-finned pilot whales

    Curé, C., Isojunno, S., I Vester, H., Visser, F., Oudejans, M., Biassoni, N., Massenet, M., Barluet de Beauchesne, L., J Wensveen, P., Sivle, L. D., Tyack, P. L. & Miller, P. J. O., Sep 2019, In : Animal Cognition. 22, 5, p. 863-882 20 p.

    Research output: Contribution to journalArticle

  3. Northern bottlenose whales in a pristine environment respond strongly to close and distant navy sonar signals

    Wensveen, P. J., Isojunno, S., Hansen, R. R., Von Benda-beckmann, A. M., Kleivane, L., Van Ijsselmuide, S., Lam, F. A., Kvadsheim, P. H., Deruiter, S. L., Curé, C., Narazaki, T., Tyack, P. L. & Miller, P. J. O., 20 Mar 2019, In : Proceedings of the Royal Society B: Biological Sciences. 286, 1899, 10 p., 20182592.

    Research output: Contribution to journalArticle

  4. Predicting acoustic dose associated with marine mammal behavioural responses to sound as detected with fixed acoustic recorders and satellite tags

    von Benda-Beckmann, A. M., Wensveen, P. J., Prior, M., Ainslie, M. A., Hansen, R. R., Isojunno, S., Lam, F. P. A., Kvadsheim, P. H. & Miller, P. J. O., 20 Mar 2019, In : Journal of the Acoustical Society of America. 145, 3, p. 1401-1416 16 p.

    Research output: Contribution to journalArticle

  5. Future directions in research on beaked whales

    Hooker, S. K., De Soto, N. A., Baird, R. W., Carroll, E. L., Claridge, D., Feyrer, L., Miller, P. J. O., Onoufriou, A., Schorr, G., Siegal, E. & Whitehead, H., 25 Jan 2019, In : Frontiers in Marine Science. 5, 16 p., 514.

    Research output: Contribution to journalArticle

Related by journal

  1. Ecology and Evolution (Journal)

    Joanna Louise Kershaw (Member of editorial board)
    23 Jan 2019

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  2. Ecology and Evolution (Journal)

    Will Cresswell (Reviewer)
    28 Sep 2017

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  3. Ecology and Evolution (Journal)

    Nora Nell Hanson (Reviewer)
    2016

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

  4. Ecology and Evolution (Journal)

    David Michael Shuker (Member of editorial board)
    2011

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. Accounting for preferential sampling in species distribution models

    Pennino, M. G., Paradinas, I., Illian, J. B., Muñoz, F., Bellido, J. M., López-Quílez, A. & Conesa, D., 1 Jan 2019, In : Ecology and Evolution. 9, 1, p. 653-663 11 p.

    Research output: Contribution to journalArticle

  2. Decline in abundance and apparent survival rates of fin whales (Balaenoptera physalus) in the northern Gulf of St. Lawrence

    Schleimer, A., Ramp, C., Delarue, J., Carpentier, A., Bérubé, M., Palsbøl, P. J., Sears, R. & Hammond, P. S., Apr 2019, In : Ecology and Evolution. 9, 7, p. 4231-4244 14 p.

    Research output: Contribution to journalArticle

  3. Late Pleistocene speciation of three closely related tree peonies endemic to the Qinling–Daba Mountains, a major glacial refugium in Central China

    Xu, X-X., Cheng, F-Y., Peng, L-P., Sun, Y-Q., Hu, X-G., Li, S-Y., Xian, H-L., Jia, K-H., Abbott, R. J. & Mao, J-F., 17 Jun 2019, In : Ecology and Evolution. Early View, 21 p.

    Research output: Contribution to journalArticle

  4. Long-term sound and movement recording tags to study natural behavior and reaction to ship noise of seals

    Mikkelsen, L., Johnson, M., Wisniewska, D. M., van Neer, A., Siebert, U., Madsen, P. T. & Teilmann, J., 6 Feb 2019, In : Ecology and Evolution. Early View, 14 p.

    Research output: Contribution to journalArticle

  5. Repeat disturbances have cumulative impacts on stream communities

    Haghkerdar, J. M., McLachlan, J. R., Ireland, A. & Greig, H. S., 14 Feb 2019, In : Ecology and Evolution. Early View, 9 p.

    Research output: Contribution to journalArticle

ID: 256167409