Document of bibliographic reference 339670

BibliographicReference record

Type

Bibliographic resource

Type of document

Journal article

BibLvlCode

AS

Title

Distribution and genetic divergence of deep-sea hydrothermal vent copepods (Dirivultidae: Siphonostomatoida: Copepoda) in the Northwestern Pacific

Abstract

Copepods in the family Dirivultidae are one of the most successful meiofauna in deep-sea hydrothermal vent fields and are abundant near venting fluid. Although vents are spatially limited ocean habitats, they are distributed widely in the Atlantic, Pacific, and Indian Oceans. However, knowledge of dirivultid biogeography and phylogeography remains limited, especially in the northwestern Pacific. Here, we obtained partial mitochondrial COI gene sequences of three dirivultids from the northwestern Pacific—Stygiopontius senokuchiae and an unidentified Chasmatopontius species from vent fields in the Izu–Bonin Arc and Stygiopontius senckenbergi associated with the squat lobster Shinkaia crosnieri in the Okinawa Trough—and analyzed them in comparison with existing data. The among-species sequence diversity exceeded 80 out of 560 bp (14% or 0.166 in Kimura 2-parameter distance), whereas the within-species diversity was less than 10 bp (2% or 0.018 in Kimura 2-parameter distance), with no genetic saturation. Each species formed a monophyletic clade and the genetic region targeted is deemed reliable for identifying species and populations for these copepods. Among the three genera targeted, only Chasmatopontius formed a monophyletic cluster, while Aphotopontius and Stygiopontius did not. Species delimitation analyses suggested the existence of cryptic species in Chasmatopontius. Subdivision among local populations was observed in Aphotopontius, but not in Stygiopontius in the same distribution, implying potential differences in dispersal ability among different genera of dirivultids. Further sampling is required, to fill the spatial gaps to elucidate the biogeography and evolution of dirivultids in the global deep ocean.

WebOfScience code

https://www.webofscience.com/wos/woscc/full-record/WOS:000656114300003

Bibliographic citation

Kayama Watanabe, H.; Senokuchi, R.; Nomaki, H.; Kitahashi, T.; Uyeno, D.; Shimanaga, M. (2021). Distribution and genetic divergence of deep-sea hydrothermal vent copepods (Dirivultidae: Siphonostomatoida: Copepoda) in the Northwestern Pacific. Zool. Sci. 38(3): 223-230. https://dx.doi.org/10.2108/zs200153

Topic

Marine

Is peer reviewed

true

Access rights

open access

Is accessible for free

true