Martin et al. 1946 define "aggregate percentage" as a metric that describes the mean percentage contribution of a group to the total mass/abundance of all samples. The metric is useful in datasets that are plagued by outliers and non-normality, something that is a commonplace with most ecological community and diet studies in my experience. Aggregate percentage is calculated as follows:
$AP_i = \frac{100\%}{N_y} \times \sum\limits_{j = 1}^{N}(\frac{a_{ij}}{\sum a_j})$
Where i is the i$^{th}$ taxon, j the j$^{th}$ sample, N total number of samples, a$_{ij}$ the abundance or mass of i$^{th}$ taxon in j$^{th}$ sample, and $\sum a_j$ the summed abundance or mass of all taxa in j$^{th}$ sample.
Martin et al. 1946 illustrate this as follows:
I am sure that "aggregate percentage" is a standard method in ecology, but I cannot find many studies using this term by googling. Probably the method has synonyms and there might be a more accepted term for the method nowadays. My question is what is the valid term to use for the method?