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A somatosensory fovea in the fingertips of the Surinam toadNARA Subscribed
The Surinam toad ( Pipa pipa ) is a fully aquatic, tongueless pipid frog that captures prey using rapid suction feeding coordinated by the forelimbs. The digit tips bear distinctive lobed structures whose function has been unknown. Here we characterize the morphology, mechanical sensitivity, peripheral innervation, central representation, and behavioral function of these digit tip lobes using scanning electron microscopy, von...
A methodological assessment and reflection on member checking as a form of participant validation for conservation social scienceNARA Subscribed
Qualitative approaches are increasingly applied in conservation social science, yet methodological reflection remains limited. Member checking, a process of returning findings to participants for feedback, is widely recognized outside conservation as a means to enhance rigor and reciprocity, but it is rarely reported in conservation research. This paper assesses and reflects on the implementation of member checking within a pa...
E122Q rhodopsin: pigment microspectrophotometry, photoreceptor light responses, and bleaching adaptationNARA Subscribed
When the rhodopsin visual pigment of vertebrate rods absorbs light, photoisomerization of its 11- cis retinal chromophore to all-trans retinal triggers a conformational change, ultimately leading to the formation of metarhodopsin II (meta II), the active signalling state. Meta II initiates the phototransduction cascade, culminating in membrane hyperpolarization. To investigate how meta II lifetime shapes the rod photoresponse,...
Background Aspects of the gut microbiome, including presence of specific bacterial species and overall community structure, have been linked to the etiology and prognosis of colorectal cancer (CRC). Less is known about the epidemiologic risk factors that are associated with the composition of the microbiota in invasive colorectal tumors. Methods Using tumor and paired normal colorectal tissue samples from a subset of participa...
Carbon fluxes in two temperate ponds are mediated by stratification and primary producersNARA Subscribed
Ponds influence global carbon (C) cycling due to high rates of organic C (OC) burial and carbon dioxide (CO 2 ) and methane (CH 4 ) emissions. Here, we quantified OC burial rates and CO 2 and CH 4 concentrations and fluxes in two ponds that were similar in size and gross primary production, but differed in depth and dominant primary producers. The deeper (3.9 m) Texas Hollow Pond was phytoplankton dominated with stronger and l...