The length of the feeding observation was identical for all infants in the same age group.
Most likely, the passage of blood through the proboscis is due to the blood pressure of the fish, as confirmed by feeding observation (Oliverio & Modica, unpublished observations).
To measure the amount of food that Drosophila consumed, we have performed dye‐calibrated feeding observation as described in Wong et al.
The number of sucks per minute over the 10 or 15 min feeding observation in babies of 21-28 dand and 3-5 mofths of age, respectively, was used as the primary outcome of the oral feeding performance.
Forty-three percent of feeding observations in forested sites were on non-native flowers.
The energy intake of individual females was assessed by combining detailed feeding observations with nutritional analysis of food samples.
At the same time, conventional studies such as feeding observations or gut content analyses reveal only the materials ingested and not necessarily those assimilated by the consumers.
I carried out such a study using intertidal bird feeding observations to estimate the range of interaction strengths between birds and their prey, and then made quantitative predictions about system responses to experimental manipulations of birds (Wootton 1997).
One index estimates the nutrient concentration of the diet chosen by Ceratogymna atrata and Bycanistes albotibialis on a monthly basis using 3165 feeding observations combined with fruit pulp sample data.
To date the majority of feeding observations of dolphins have been made from above water, based on surface or near-surface feeding behaviours visible from boats or shore [1], [12].
Next, we recast feeding observations according to the carotenoid content of different fruit species.
