@article {Tunnicliffe2013,
	title = {{Population ecology of the tonguefish Symphurus thermophilus (Pisces; Pleuronectiformes; Cynoglossidae) at sulphur-rich hydrothermal vents on volcanoes of the northern Mariana Arc}},
	journal = {Deep-Sea Research. Part II: Topical Studies in Oceanography},
	volume = {92},
	year = {2013},
	pages = {172{\textendash}182},
	abstract = {Flatfish are a major component of the hydrothermal vent community on three seamounts of the northern Mariana Volcanic Arc in the northwest Pacific. Nikko, Kasuga-2 and Daikoku seamounts host vent fields between 375 and 480~m depth where high temperature vents release molten sulphur. The small cynoglossid tonguefish, Symphurus thermophilus Munroe and Hashimoto, is ubiquitous in all vent habitats observed on these seamounts: among extensive fields of tubeworms and mussels and on solid sulphur surfaces on Nikko; on sulphur-rich sediments and barnacle-covered boulders on Kasuga-2; and on recent sulphur flows and on broad areas of loose and semi-consolidated sediments on Daikoku. We recorded repeated forays by individuals onto flows of molten sulphur as these surfaces cooled. Based on observations using ROVs, the mean density is 90~fish/m2 with maximum counts over 200~fish/m2 on Daikoku sediments. Compared to collected tonguefish from Daikoku and Kasuga-2, those from Nikko have significantly greater lengths and, on average, six times the mass. Otolith data indicate upper ages of 13 years with Nikko tonguefish growing significantly faster. Diets of tonguefish on the three seamounts reflect the different habitats and prey availability; in Daikoku specimens, small crustaceans and polychaetes are most common while on Nikko, gut contents are predominantly larger shrimp. We made the unusual observation of stunned midwater fish falling to the seafloor near the vents where S. thermophilus immediately attacked them. This tonguefish has a wide diet range and foraging behaviour that likely influence the differing growth rates and sizes of fish inhabiting the different vent sites. Limited genetic data suggest that larval exchange probably occurs among sites where the common habitat factor is high levels of elemental sulphur forming hard and partly unconsolidated substrata. Here, in the northern range of the Mariana Trench Marine National Monument, S. thermophilus, despite having an unusually broad habitat association, may be restricted in its overall range to this region of isolated volcanoes with active hydrothermalism.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0967-0645},
	doi = {10.1016/j.dsr2.2013.01.026},
	url = {http://www.sciencedirect.com/science/article/pii/S0967064513000465},
	author = {Tunnicliffe, V and Tyler, J and Dower, J F}
}
@article {Tunnicliffe2010,
	title = {{Flatfish at seamount hydrothermal vents show strong genetic divergence between volcanic arcs}},
	journal = {Marine Ecology-an Evolutionary Perspective},
	volume = {31},
	year = {2010},
	month = {sep},
	pages = {158{\textendash}167},
	abstract = {Hydrothermal vents near the summits of seamounts in Western Pacific volcanic arcs foster dense populations of flatfishes, a group otherwise unknown at vents. We examined genetic divergence among populations of a symphurine tonguefish described as Symphurus thermophilus Munroe {\&} Hashimoto from sites up to 6000 km apart in the Western Pacific to explore connectivity patterns among seamounts. Average genetic divergence between individuals from the Mariana Arc and the Tonga-Kermadec Arcs was 14.2{\%} (COI) and 9.0{\%} (16S), whereas within-arc divergences were {\textless}0.3{\%}. We found that the Tonga-Kermadec individuals represent a cryptic species, Symphurus sp. A, displaying similar phenotypic features and behaviour to the Mariana Arc S. thermophilus. We also sequenced another distinctive symphurine species; Symphurus sp. B. Collections and image records from three expeditions to the Tonga and Kermadec arcs revealed characteristics of the distribution, dispersion, behaviour and morphology of these flatfish species. These two new Symphurus species inhabit vents where native sulphur occurs in excess and depths are {\textless}600 m. Substratum range of Symphurus sp. A was wide, including mussel beds, rock surfaces and sediments in densities that may exceed 100 m-2. Reproductive females were present. The complex and diverse nature of volcanic settings of hydrothermalism introduces a wide variety of habitat conditions that likely augments diversity of faunas on seamounts in distinct biogeographic provinces.},
	keywords = {ROV Jason (Remotely Operated Vehicle)},
	issn = {0173-9565},
	doi = {10.1111/j.1439-0485.2010.00370.x},
	author = {Tunnicliffe, V and Koop, B F and Tyler, J and So, Stacy}
}
