Abstract:
:The vast majority of species within the lanternshark genus Etmopterus harbour complex luminescent markings on their flanks, whose functional significance has long remained obscure. Recent studies, however, suggest these enigmatic photophore aggregations to play a role in intraspecific communication. Using visual modelling based on in vivo luminescence measurements from a common lanternshark species, we show that etmopterid flank markings can potentially work as a medium range signal for intraspecific detection/recognition. In addition, using molecular phylogenetic analyses, we demonstrate that the Etmopterus clade exhibits a greater than expected species richness given its age. This is not the case for other bioluminescent shark clades with no (or only few) species with flank markings. Our results therefore suggest that etmopterid flank markings may provide a way for reproductive isolation and hence may have facilitated speciation in the deep-sea.
journal_name
R Soc Open Scijournal_title
Royal Society open scienceauthors
Claes JM,Nilsson DE,Mallefet J,Straube Ndoi
10.1098/rsos.150219subject
Has Abstractpub_date
2015-07-29 00:00:00pages
150219issue
7issn
2054-5703pii
rsos150219journal_volume
2pub_type
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