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Can Ethograms Be Automatically Generated Using Body Acceleration Data from Free-Ranging Birds?
TLDR
This work demonstrates an automated procedure to categorize behavior from body acceleration, together with the release of a user-friendly computer application, “Ethographer”, which has the potential to detect previously unknown types of behavior and unknown sequences of some behaviors.
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Factors affecting stroking patterns and body angle in diving Weddell seals under natural conditions
TLDR
Prolonged gliding seems to be a more efficient method for locomotion because the surface time between dives of gliding seals was significantly less than that of stroking animals, despite their same stroke frequencies.
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Buoyancy and maximal diving depth in penguins: do they control inhaling air volume?
TLDR
Bomechanical calculations for data from free-ranging king and Adélie penguins indicate that the air volume of the birds (respiratory system and plumage) can provide enough buoyancy for the passive ascent, and there is a positive correlation between air volume and the depth of the dive.
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Species- and sex-specific differences in foraging behaviour and foraging zones in blue-footed and brown boobies in the Gulf of California
TLDR
It is suggested that sex-specific foraging behaviour of 2 sympatric seabird species may be mainly related to breeding involvement, as males are more involved in nest attendance and defence and females are greater provisioners.
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Individual variation in feeding habitat use by adult female green sea turtles (Chelonia mydas): are they obligately neritic herbivores?
TLDR
The results and previous findings suggest that ontogenetic habitat shifts by sea turtles are facultative, and consequently, their life histories are polymorphic.
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Stroke frequency, but not swimming speed, is related to body size in free-ranging seabirds, pinnipeds and cetaceans
TLDR
It is suggested that muscle characteristics may constrain swimming during cruising travel, with convergence among diving specialists in the proportions and contraction rates of propulsive muscles.
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Swim speeds and stroke patterns in wing-propelled divers: a comparison among alcids and a penguin
SUMMARY In diving birds, the volume and resulting buoyancy of air spaces changes with dive depth, and hydrodynamic drag varies with swim speed. These factors are important in the dive patterns and…
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Seasonal fluctuations in sand temperature: effects on the incubation period and mortality of loggerhead sea turtle (Carettacaretta) pre-emergent hatchlings in Minabe, Japan
Abstract. Incubation period, hatching success, and emergence percentage in loggerhead (Carettacaretta) nests were quantified during the 1993 and 1995 nesting seasons and following incubation seasons…
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Internesting intervals for loggerhead turtles, Caretta caretta, and green turtles, Chelonia mydas, are affected by temperature
TLDR
To investigate the influence of temperature on the length of internesting periods in loggerhead turtles and green turtles, body temperature and water temperature and depth for free-ranging turtles were monitored using micro data loggers and Arrhenius' equation was used to describe the quantitative relationships.
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Regulation of stroke and glide in a foot-propelled avian diver
TLDR
Birds appeared to maintain the duration and the maximum strength of power stroke and thus optimize muscle contraction efficiency during the descent, ascent and bottom phases of a foot-propelled diving bird, the European shag Phalacrocorax aristotelis in the wild.
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