An Updated Taxonomic Account of Limnetic Crustacean Zooplankton in Lake Taal, Philippines
Rey Donne S. Papa1,2,3* Dino T. Tordesillas2,5, and Augustus C. Mamaril, Sr.4
1Department of Biological Sciences, 2Graduate School and
3Research Center for the Natural and Applied Sciences,
University of Santo Tomas, Manila, Philippines
4Institute of Biology, University of the Philippines - Diliman, Quezon City, Philippines
5Department of Biology, St. Paul University, Quezon City, Philippines
corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
Limnetic crustacean zooplankton are the preferred prey of the economically important and endemic zooplanktivore Sardinella tawilis (Clupeidae) of Lake Taal. In this paper, we update the species composition, morphology and distribution of limnetic crustacean zooplankton in Lake Taal based on samples collected from 2008 through 2010. A total of nine species belonging to Copepoda (3 spp.) and Cladocera (6 spp.) have been documented including Arctodiaptomus dorsalis, a Neotropical species and Pseudodiaptomus brehmi, which was previously thought to be restricted to Lake Naujan, Mindoro Is. Information on these relatively understudied taxa is an important contribution to the on-going re-assessment of Lake Taal biodiversity in the light of aquaculture and eutrophication impacts, as well as the presence of introduced species.
INTRODUCTION
Studies on Philippine zooplankton were formally started by the description of Trochosphaera aequatorialis in 1872 based on samples collected from a rice field in Mindanao Island in southern Philippines (De Elera 1895; Mamaril Sr. & Fernando 1978; 1984). This was followed by the first accounts of zooplankton species richness during the Wallacea expedition (Brehm 1938; Brehm 1942; Hauer 1941; Kiefer 1930; Kiefer 1939a; Kiefer 1939b; Woltereck et al. 1941). This likewise included surveys of lakes such as Laguna de Bay, Taal, Balinsasayao, Buhi, Calibato, Danao, Lanao, Mainit, and Naujan. Measurements on some basic physico-chemical and morphological characteristics of the aforementioned lakes were also carried out. New species of crustacean zooplankton such as Alona pseudoanodonta Brehm, Diaptomus insulanus Wright and its synonym D. sensibilis Kiefer, D. vexillifer Brehm, Mesocyclops hyalinus Kiefer, Pseudodiaptomus brehmi Kiefer, Tropodiaptomus gigantoviger Brehm, T. prasinus Brehm, and Thermocyclops wolterecki Kiefer have been described based on the samples collected from the expedition. New records have also been established for many cladoceran species. . . . . . . . . . . . . . . .
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