TY - JOUR
T1 - Mitochondrial genome diversity and population structure of the giant squid Architeuthis
T2 - genetics sheds new light on one of the most enigmatic marine species
AU - Winkelmann, Inger Eleanor Hall
AU - Campos, Paula
AU - Strugnell, Jan
AU - Cherel, Yves
AU - Smith, Peter J.
AU - Kubodera, Tsunemi
AU - Allcock, Louise
AU - Kampmann, Marie-Louise
AU - Schroeder, Hannes
AU - Guerra, Angel
AU - Norman, Mark
AU - Finn, Julian
AU - Ingrao, Debra
AU - Clarke, Malcolm
AU - Gilbert, Tom
PY - 2013/5/22
Y1 - 2013/5/22
N2 - Despite its charismatic appeal to both scientists and the general public, remarkably little is known about the giant squid Architeuthis, one of the largest of the invertebrates. Although specimens of Architeuthis are becoming more readily available owing to the advancement of deep-sea fishing techniques, considerable controversy exists with regard to topics as varied as their taxonomy, biology and even behaviour. In this study, we have characterized the mitochondrial genome (mitogenome) diversity of 43 Architeuthis samples collected from across the range of the species, in order to use genetic information to provide new and otherwise difficult to obtain insights into the life of this animal. The results show no detectable phylogenetic structure at the mitochondrial level and, furthermore, that the level of nucleotide diversity is exceptionally low. These observations are consistent with the hypotheses that there is only one global species of giant squid, Architeuthis dux (Steenstrup, 1857), and that it is highly vagile, possibly dispersing through both a drifting paralarval stage and migration of larger individuals. Demographic history analyses of the genetic data suggest that there has been a recent population expansion or selective sweep, which may explain the low level of genetic diversity.
AB - Despite its charismatic appeal to both scientists and the general public, remarkably little is known about the giant squid Architeuthis, one of the largest of the invertebrates. Although specimens of Architeuthis are becoming more readily available owing to the advancement of deep-sea fishing techniques, considerable controversy exists with regard to topics as varied as their taxonomy, biology and even behaviour. In this study, we have characterized the mitochondrial genome (mitogenome) diversity of 43 Architeuthis samples collected from across the range of the species, in order to use genetic information to provide new and otherwise difficult to obtain insights into the life of this animal. The results show no detectable phylogenetic structure at the mitochondrial level and, furthermore, that the level of nucleotide diversity is exceptionally low. These observations are consistent with the hypotheses that there is only one global species of giant squid, Architeuthis dux (Steenstrup, 1857), and that it is highly vagile, possibly dispersing through both a drifting paralarval stage and migration of larger individuals. Demographic history analyses of the genetic data suggest that there has been a recent population expansion or selective sweep, which may explain the low level of genetic diversity.
U2 - 10.1098/rspb.2013.0273
DO - 10.1098/rspb.2013.0273
M3 - Journal article
C2 - 23516246
SN - 0962-8452
VL - 280
JO - Proceedings of the Royal Society B: Biological Sciences
JF - Proceedings of the Royal Society B: Biological Sciences
IS - 1759
M1 - 20130273
ER -