'population count' = A count of individuals in a population.
Modification to 'census objective specification' (bolded): An objective specification to observe and/or estimate all the organisms of a particular taxon in a particular geographical region or place and create a data set about them.
'population count' = A count of individuals in a population.
Modification to 'census objective specification' (bolded): An objective specification to observe and/or estimate all the organisms of a particular taxon in a particular geographical region or place and create a data set about them.