5 Works

Thermal plasticity of setae of the second limb of Daphnia

Derek Taylor & Keonho Kim
These data are associated with a study that tests the hypothesis of thermal plasticity in the rigid setae of the second limb of Daphnia. The data are body size and length measurements (mm) of three limb setae (limb 2; endite 2). The second seta is often called the "rigid" seta because it is heavily chitinized. In all, 300 specimens of Daphnia (including Daphnia umbra and Daphnia galeata) were dissected from four sets of clonal thermal...

Oak galls exhibit ant-dispersal convergent with myrmecochorous seeds

Robert Warren, Antoine Guiguet, Chloe Mokadam, John Tooker & Andrew Deans
Ants disperse oak galls of some cynipid wasp species similarly to how they disperse seeds with elaiosomes. We conducted choice assays in field and lab settings, with ant-dispersed seeds and wasp-induced galls found in ant nests and found that seed-dispersing ants retrieve these galls as they do myrmecochorous seeds. We also conducted manipulative experiments in which we removed the putative ant-attracting appendages (“kapéllos”) from galls and found ants are specifically attracted to kapéllos. Finally, we...

Dual spring force couples yield multifunctionality and ultrafast, precision rotation in tiny biomechanical systems

S. N. Patek, Ryan St. Pierre, Greg Sutton, Suzanne Cox, Sarah Bergbreiter, Adam Summers & Chi-Yun Kuo
Small organisms use propulsive springs rather than muscles to repeatedly actuate high acceleration movements, even when constrained to tiny displacements and limited by inertial forces. Through integration of a large kinematic dataset, measurements of elastic recoil, energetic math modeling, and dynamic math modeling, we tested how trap-jaw ants (Odontomachus brunneus) utilize multiple elastic structures to develop ultrafast and precise mandible rotations at small scales. We found that O. brunneus develops torque on each mandible using...

Concordant patterns of morphological, stable isotope, and genetic variation in a recent ecological radiation (Salmonidae:Coregonus spp.)

Moisés Bernal, Daniel Yule, Wendylee Stott, Lori Evrard, Thomas Dowling & Trevor Krabbenhoft
Groups of sympatric taxa with low inter-specific genetic differentiation, but considerable ecological differences, offer great opportunities to study the dynamics of divergence and speciation. This is the case of ciscoes (Coregonus spp.) in the Laurentian Great Lakes, which are characterized by a complex evolutionary history and are commonly described as having undergone an adaptive radiation. In this study, morphometrics, stable isotopes and transcriptome sequencing were used to study the relationships within the Coregonus artedi complex...

Data from: An integrative skeletal and paleogenomic analysis of stature variation suggests relatively reduced health for early European farmers

Stephanie Marciniak, Christina Bergey, Ana Maria Silva, Agata Hałuszko, Mirosław Furmanek, Barbara Veselka, Petr Velemínský, Giuseppe Vercellotti, Joachim Wahl, Gunita Zarina, Cristina Longhi, Jan Kolář, Rafael Garrido-Pena, Raúl Flores-Fernández, Ana M. Herrero-Corral, Angela Simalcsik, Werner Müller, Alison Sheridan, Žydrūnė Miliauskienė, Rimantas Jankauskas, Vyacheslav Moiseyev, Kitti Köhler, Ágnes Király, Beatriz Gamarra, Olivia Cheronet … & George H. Perry
Human culture, biology, and health were shaped dramatically by the onset of agriculture ~12,000 years before present (BP). This shift is hypothesized to have resulted in increased individual fitness and population growth as evidenced by archaeological and population genomic data alongside a decline in physiological health as inferred from skeletal remains. Here, we consider osteological and ancient DNA data from the same prehistoric individuals to study human stature variation as a proxy for health across...

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