Do seasonal changes in metabolic rate facilitate changes in diving behaviour?

Do seasonal changes in metabolic rate facilitate changes in diving behaviour?

Macaroni penguins were implanted with data loggers to record heart rate (fH), abdominal temperature (Tab) and diving depth during their pre-moult trip (summer) and winter migration. The penguins showed substantial differences in diving behaviour between the seasons. During winter, mean and maximum dive duration and dive depth were significantly greater than during summer, but the proportion of ...

Seasonal changes in buoyancy and diving behaviour of adult grey seals.

Phocid seals go through dramatic seasonal changes in body mass and composition as a result of the spatial and temporal separation of foraging, reproduction and moulting. These changes in body fat content and body mass result in seasonal changes in buoyancy, which in turn may influence diving behaviour. We examined the longitudinal changes in buoyancy and diving behaviour of 14 adult grey seals ...

Changes in Heart Rate and Respiratory Frequency during Natural Behaviour of Ducks, with Particular Reference to Diving

Respiratory changes with deep diving.

Deep diving refers to saturation diving to a depth of more than 180 m (1.9 MPa ambient pressure). In the 1990s diving to 400 m may be necessary on the Norwegian continental shelf. The safety margins are narrow and the respiratory system is subject to great strain at such depths. The respiratory resistance increases and the dynamic lung volumes are reduced as the pressure increases due to enhanc...

What can industry do to facilitate dietary and behavioural changes?

The food industry has five important roles in facilitating needed dietary and behavioural changes. Two of these roles are direct ones. Industry can increase the availability of a wide variety of basic commodities and new foods that help consumers meet dietary recommendations. It is also responsible for developing and formulating appealing, healthy and effective food products that decrease risks...