Table of Contents
- Preferential intracellular pH regulation: hypotheses and perspectives
Summary: Preferential intracellular pH regulation confers exceptional tolerance to a severe acute respiratory acidosis. This trait may represent a basal pattern of acid–base regulation used by developing vertebrates that is lost or retained in adults.
- Amphibious fishes: evolution and phenotypic plasticity
Summary: We review the use of phenotypic plasticity by amphibious fishes and ask whether studying plasticity in extant fishes can provide insight into evolutionary changes during the tetrapod invasion of land.
- The high cost of reproduction in sea otters necessitates unique physiological adaptations
Highlighted Article: Female sea otters must manage high pup rearing costs on top of exceptional baseline energy demands; to accomplish this task, they exhibit distinct metabolic changes during key reproductive stages.
- Repair of traumatized mammalian hair cells via sea anemone repair proteins
Highlighted Article: Specific proteins secreted by sea anemones following trauma of hair cells on their tentacles assist in the recovery of traumatized hair cells of the murine cochlea.
METHODS & TECHNIQUES
- Separating underwater ambient noise from flow noise recorded on stereo acoustic tags attached to marine mammals
Summary: A method is presented that allows users of sound recording tags attached to marine mammals to measure flow noise and ambient noise separately.
- The rebound of the body during uphill and downhill running at different speeds
Summary: When running uphill or downhill, the bouncing mechanism of running progressively disappears with slope and speed to contain the increase in muscular power necessary to overcome the slope.
- The influence of dissolved organic matter (DOM) on sodium regulation and nitrogenous waste excretion in the zebrafish (Danio rerio)
Summary: Dissolved organic materials, ubiquitous but often overlooked components of natural waters, have profound effects on the ionoregulatory physiology of zebrafish, effects that depend on properties of these heterogeneous substances.
- Ammonia excretion in mytilid mussels is facilitated by ciliary beating
Highlighted Article: The plicate organ of mytilid mussels is a main site for ammonia excretion, which is facilitated by Rh channels and ciliary beating.
- Regional variability in diving physiology and behavior in a widely distributed air-breathing marine predator, the South American sea lion (Otaria byronia)
Summary: Regional variation in diving ability and behavior of the South American sea lion suggests that exposure to different habitats and geographical locations better explains oxygen storage capacities and diving capability than body size alone.
- A subset of neurons controls the permeability of the peritrophic matrix and midgut structure in Drosophila adults
Summary: Neuronal activity of a subset of neurons is required to maintain the organized proventricular structure and physical barriers of the peritrophic matrix and epithelia in Drosophila gut.
- Reduced L-type Ca2+ current and compromised excitability induce loss of skeletal muscle function during acute cooling in locust
Summary: Cooling-induced dysfunction of locust skeletal muscle reflects compromised muscle excitability that arises from reduced L-type Ca2+current.
- Arginine and proline applied as food additives stimulate high freeze tolerance in larvae of Drosophila melanogaster
Highlighted Article: Development of a laboratory technique that secures high survival of the tropical fly Drosophila melanogaster when most of its body water is frozen.
- Sexual dimorphism in the compound eye of Heliconius erato: a nymphalid butterfly with at least five spectral classes of photoreceptor
Summary: Female Heliconius erato butterflies have two UV-sensitive photoreceptors, but males only have one, and both sexes have a red-sensitive photoreceptor.
- CCAP and FMRFamide-like peptides accelerate the contraction rate of the antennal accessory pulsatile organs (auxiliary hearts) of mosquitoes
Summary: Three insect neuropeptides accelerate the contraction rate of the antennal hearts of mosquitoes, as well as the velocity of hemolymph in the antennal space.
- Disentangling the visual cues used by a jumping spider to locate its microhabitat
Summary: Lyssomanes viridis jumping spiders attend to minimal visual information when localizing host plant species, seeking out a specific level of ambient illumination and possibly leaf brightness, but apparently ignoring leaf shape and color.
- P450 aromatase: a key enzyme in the spermatogenesis of the Italian wall lizard, Podarcis sicula
Summary: P450 aromatase is an enzyme that produces 17β-estradiol and plays a key role in the control of spermatogenesis in Podarcis sicula.