Affective states, such as emotions, are presumably widespread across the animal kingdom
because of the adaptive advantages they are supposed to confer. However, the study of the …

Ageing is characterized by a progressive deterioration of multiple physiological and
molecular pathways, which impair organismal performance and increase risks of death with …

The first comprehensive review of all aspects of the biology of moult, drawing information
from across the literature and in all birds, from penguins to passerines. Feathers are …

The ingestion of lead (Pb) ammunition is the most important exposure pathway to this metal
in birds and involve negative consequences to their health. We have performed a passive …

Coastal seabirds serve as sentinels of ecosystem health due to their vulnerability to
contamination from human activities. However, our understanding on how contaminant …

Chronic, low‐intensity parasite infections can reduce host fitness through negative impacts
on reproduction and survival, even if they produce few overt symptoms. As a result, these …

We review evidence for and against the use of erythrocyte indicators of health status and
condition, parasite infection level and physiological stress in free‐living vertebrates. The use …

Costs of reproduction are an integral and long-standing component of life-history theory, but
we still know relatively little about the specific physiological mechanisms underlying these …

Context: As a result of increases in life expectancy and decreases in fertility, the proportion
of the population entering later life has increased dramatically in recent decades. When …

Blood oxygen-carrying capacity is one of the important determinants of the amount of
oxygen supplied to the tissue per unit time and plays a key role in oxidative metabolism. In …