(Permission to include this book review in key is still awaited to be granted by A. Mamaril).
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Augustus C. Mamaril, Associate Professor; M.S. The Institute of Biology of the University of the Philippines in Diliman, wrote following about the first version of the key (1981, before the present updating):
"A professor at the University of Waterloo in Ontario, Canada, once remarked, "To study zooplankton, one must have a great capacity to get bored". That classic statement would most likely apply to aquatic biologists who attempt to do taxonomic studies of these little beasts.
"An Illustrated Key To the Philippine Freshwater Zooplankton" (1981) aims to fill in remaining gaps in Philippine zooplankton identification and perhaps to make available to those who have anything to do with freshwater zooplankton a key to identification. The use of the key is facilitated by the provision of line drawings, many of which were adapted from various sources and the rest done by FP. Unlike most keys (e.g., Edmondson 1959) and monographs (Bylov 1948; Dussart 1967, 1969), this work is blessed with a liberal dose of illustrations that include those of external morphological variations of several species, especially rotifers (brachionids, in particular). These variations were reported in the literature the author has had access to. The section on literature cited includes several of the significant and relevant works on Philippine freshwater zooplankton. Overall, this present work should serve the purpose for which it is intended, i.e., as a ready reference to the identification of freshwater zooplankton.
Already there seems to be an undercurrent of interest in zooplankton, including marine species. The present work cannot but help stir up more studies in Philippine waters. True, computer technology has made inroads into zooplankton identification and counting. In the final analysis, however, what a zooplanktonologist needs is a reliable and complete key. And, with the risk of being redundant, a great capacity to get bored. Mills (1981) summed it up: Those exciting little aquatic animals living at low Reynolds numbers deserve no less.
(17 August 1983)
 *The UW biology department has nurtured the likes of HBN Hynes (Ecology of Running Waters, Biology of Polluted Waters), C.H. Fernando, A.D. Harrison, and N.K. Kaushik)."