J. C. Partridge results 23
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Global phylogeography of hyperdiverse lanternfishes indicates sympatric speciation in the deep seaNARA Subscribed
Aim Lanternfishes (Myctophidae) are one of the most species‐rich families of mid‐water fishes. They inhabit the mesopelagic zone, where physical barriers to dispersal and gene flow are permeable. Thus, modes of speciation that rely exclusively on geographical separation are potentially of less importance than those that rely more prominently on evolution of assortative mating through divergent habitat use and/or sexual signals...
Common, low-frequency, rare, and ultra-rare coding variants contribute to COVID-19 severityNARA Subscribed
The combined impact of common and rare exonic variants in COVID-19 host genetics is currently insufficiently understood. Here, common and rare variants from whole-exome sequencing data of about 4000 SARS-CoV-2-positive individuals were used to define an interpretable machine-learning model for predicting COVID-19 severity. First, variants were converted into separate sets of Boolean features, depending on the absence or the pr...
In 2011, the enigma of “mystery circles,” small but complex underwater structures first observed by divers from southern Japan in 1995, was solved when a new species of pufferfish, white‐spotted pufferfish ( Torquigener albomaculosus Matsuura 2014), was identified as the responsible agent. To date these circles have been described only from Japan, where they are formed on a sandy seafloor in water depths less than 30 m. A surv...
Phototactic tails: Evolution and molecular basis of a novel sensory trait in sea snakesNARA Subscribed
Dermal phototaxis has been reported in a few aquatic vertebrate lineages spanning fish, amphibians and reptiles. These taxa respond to light on the skin of their elongate hind‐bodies and tails by withdrawing under cover to avoid detection by predators. Here, we investigated tail phototaxis in sea snakes (Hydrophiinae), the only reptiles reported to exhibit this sensory behaviour. We conducted behavioural tests in 17 wild‐caugh...
Vision and visual variation in the peacock blennyNARA Subscribed
Microspectrophotometry (MSP) revealed the presence of a rod and at least two cone classes (mid‐ and long‐wavelength sensitive) in the intertidal peacock blenny Salaria pavo . Both rhodopsin and porphyropsin based visual pigments were found in all fish, together with high individual variation in the chromophore ratio. The three morphs (females, males and sneaker males) differed in their spectral sensitivities (as measured with...
Sex differences in dogfish behaviour: alternative activity patterns and habitat choiceNARA Subscribed
Acoustic tracking of wild lesser spotted dogfish, Scyliorhinus canicula , in Lough Hyne, a tidal sea‐water lough in southwest Ireland, has demonstrated that the sexes exhibit alternative behaviours. Male dogfish remain active throughout the day and night in deep water (12–24 m), and forage in shallow or deep water by night. Female dogfish, on the other hand, refuge in shallow water caves by day (
On the visual pigments of deep‐sea fishNARA Subscribed
The retinal visual pigments of 52 species of deep‐sea fish were measured by partial bleaching of detergent extracts. The retinae of 45 species contained only a single rhodopsin with maximum absorbance (λ max ) at a wavelength between 474 and 490 nm, matching both the region of highest intensity downwelling sunlight and the maximum emission of most deep‐sea bioluminescence. Seven species were shown to have more than one visual...
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