Justine de Leon

University of Santo Tomas | UST · Research Center for the Natural Sciences

A massive invasion of the Neotropical calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) has been taking place in the Philippines since at least 1993. This copepod's fecundity is known to depend on food concentration, increasing temperature appears to have detrimental effects on its hatching success and survivorship, but parameters that are tru...

The presence of the invasive calanoid copepod Arctodiaptomus dorsalis in Philippine inland waters has been reported in numerous studies. Attempts to understand how it effectively proliferated in the country's freshwaters have shown its preference towards shallow and productive waters-a feature shared by most lakes in the Philippines. In this study,...

Food web studies rely heavily on the use of traditional gut content analysis or the fairly popular stable isotope analysis rather than fatty acid analysis (FAA) despite its straightforward process, and ability to identify and characterize more diverse trophic pathways. In this study, we employed fatty acid (FA) biomarkers as a preliminary attempt t...

We conducted a preliminary analysis on the effects of various physical and chemical parameters on the morphometry and reproductive capacity of the calanoid copepod Filipinodiaptomus insulanus (Wright, 1928), endemic to the Philippines, by proxying clutch size (CS). Specimens and water quality readings were obtained between October 2019 and February...

Lake Taal is one of the most significant lake ecosystems in tropical East Asia. In 2011, a review paper consolidated all known biodiversity and limno-ecological studies conducted in Lake Taal from the beginning of the 20th century all the way to the late 2000s. It highlighted that insufficient funding, inadequate long-term monitoring data, and the...

Food web studies rely heavily on the use of traditional gut content analysis or the fairly popular stable isotope analysis rather than fatty acid analysis (FAA) despite its straightforward process, and ability to identify and characterize more diverse trophic pathways. In this study, we employed fatty acid (FA) biomarkers as a preliminary attempt t...

The presence of the invasive calanoid copepod Arctodiaptomus dorsalis in Philippine inland waters has been reported in numerous studies. Attempts to understand how it effectively proliferated in the country’s freshwaters have shown its preference towards shallow and productive waters – a feature shared by most lakes in the Philippines. In this stud...

Calanoid copepods are the dominant zooplankton group of pelagic ecosystems and act as an intermediary between producers and higher level consumers. The abundance of copepods can be an indicator of favorable conditions in an aquatic environment. Arctodiaptomus dorsalis is an invasive calanoid species that thrives in many eutrophic lakes in the Phili...

Calanoid copepods are the dominant zooplankton group of pelagic ecosystems and act as an intermediary between producers and higher level consumers. The abundance of copepods can be an indicator of favorable conditions in an aquatic environment. Arctodiaptomus dorsalis is an invasive calanoid species that thrives in many eutrophic lakes in the Phili...