Parental behaviour is unrelated to experimentally manipulated great tit brood sex ratio

Article Abstract:

The parental behaviour of great tits, Parus major, was studied to determine the relationship between biased parental investment and offspring and parental sex. The broods were manipulated during the early stage of nestling using random amplified polymorphic DNA markers. The results revealed that the males accomplished most of the feeding visits and were more aggressive in defending the nest. On the other hand, there was insufficient evidence to prove that parental care was affected by brood sex ratio.

Research, Parental behavior in animals, Animal parental behavior

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Auditory sensitivity in the great tit: Perception of signals in the presence and absence of noise

Article Abstract:

The great tit, Parus major, is a bird species that has become a model for studying bird acoustic communications. Absolute and masked auditory thresholds have been behaviorally determined in the great tit, using a GO/NOGO method. Great tits were found to have unusually low critical masking ratios at high frequencies, showing that they can communicate effectively in noisy environments using high-frequency vocalizations.

Observations, Auditory perception

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