ontogeny
- Daily energy expenditure in white storks is lower after fledging than in the nest
Summary: Continuous measurement of heart rate and fine-scale movements of free-living juvenile white storks (Ciconia ciconia) using on-board bio-loggers reveals individual and environmental factors relating to daily mean heart rate.
- Visual system development of the spotted unicornfish, Naso brevirostris (Acanthuridae)
Summary: Retinal topography and opsin gene expression change during ontogeny of the spotted unicornfish, Naso brevirostris, with the largest changes occurring from the larval to the juvenile stage.
- Quantifying the acid–base status of dragonflies across their transition from breathing water to breathing air
Summary: Dragonflies show a moderate rise in hemolymph bicarbonate as they transition from water breathing to air breathing, while the non-bicarbonate buffer capacity of their hemolymph is low relative to that of other insects.
- How do red-eyed treefrog embryos sense motion in predator attacks? Assessing the role of vestibular mechanoreception
Highlighted Article: Red-eyed treefrogs' hatching responses to predator attacks, vibration playbacks and egg jiggling appear when vestibular function develops. Ear development may be a key limiting factor in the onset of mechanosensory-cued hatching.
- Ontogenetic scaling of pelvic limb muscles, tendons and locomotor economy in the ostrich (Struthio camelus)
Summary: The ontogenetic scaling of muscle–tendon morphology and tendon material properties suggests maintained or relatively increased muscle force generation, increased elastic energy storage and locomotor economy in adult versus juvenile ostriches.
- Ontogenetic change in predicted acoustic pressure sensitivity in larval red drum (Sciaenops ocellatus)
Summary: Computed tomography imagery in a finite-element model predicts that larval fishes detect acoustic pressure but that this pressure sensitivity declines ontogenetically, likely altering the detection and use of acoustic cues.
- Within-individual behavioural variability and division of labour in social insects
Summary: This Commentary discusses the sources of within-individual behavioural variability in social insects and considers the relationship between colony size and behavioural flexibility.
- The membrane pacemaker hypothesis: novel tests during the ontogeny of endothermy
Summary: The authors examine how tissue lipid composition changes during development, and how dietary lipid manipulation affects basal and peak metabolic rate, providing mixed support for the membrane pacemaker hypothesis.
- Femoral bone perfusion through the nutrient foramen during growth and locomotor development of western grey kangaroos (Macropus fuliginosus)
Summary: In kangaroos, growth is the main determinant of femoral bone blood flow during the in-pouch stage, whereas locomotor activity becomes the dominant factor during the post-pouch stage.
- Maximum thermal limits of coral reef damselfishes are size dependent and resilient to near-future ocean acidification
Summary: Despite a widespread perception that end-of-century ocean acidification will reduce the thermal limits of fishes, we show that critical thermal maxima of coral reef damselfishes are robust to this stressor.