Trinh Dang Mau
Hue college of science
Phylum Rotifera
• Microscopic aquatic animals
• Small size: 40-3500µm
• Ca. 2030 species
• Highly efficient reproduction
Phylum Rotifera
 Predominantly freshwater, some marine, brackish
water;
 One of three main zooplankton groups
 Food: nannoplankton and bacteria
 A key taxon in the functioning of aquatic ecosystems
Phylum Rotifera
Uses:
 Aquaculture: Brachionus plicatilis group for fish larvae;
 Ecotoxicological assays (B. calyciflorus)
 Scientific test organisms (e.g., parthenogenetic reproduction)
 Ecological and environmental studies (e.g., water quality
assessment)
…
State of the art: studies on
Rotifera in Vietnam
State of the art: studies on
Rotifera in Vietnam
• Viet Nam is located in
the tropics  high
biodiversity.
• has three of more than
200 ecozones of the
world.
State of the art: studies on
Rotifera in Vietnam
• Vietnam is recognized as one of the countries with
high biological diversity in the world, with many
types of forests, swamps, rivers, coral reefs ...
State of the art: studies on Rotifera
in Vietnam
 Shirota (1963, 1966): study on the plankton of freshwater
and coastal areas in South Vietnam, announced 985
species of marine phytoplankton, 695 species of
freshwater plankton. To these belong 78 species of
rotifers, including 72 freshwater species and 6 brackish
water species.
State of the art: studies on Rotifera
in Vietnam
 In 1980, Dang Ngoc Thanh, Thai Tran Bai and Pham Van
Mien published the document “Taxonomy of invertebrates
animals freshwater of North Vietnam." The authors
described 325 species and subspecies, with the key
classification of all groups of animal species invertebrates
found in Northern Vietnam. In there, Rotifers are also
classified as a class Rotatoria, including 54 species found
in freshwaters of North Vietnam.
State of the art: studies on Rotifera
in Vietnam
 2003, Pham Van Mien and Le Trinh reported "Research
for completing the biological indicators to assess the
quality and distribution, classification of the water
environment in Ho Chi Minh" and record the most
abundant animals, these include 13 species of rotifer of 5
families.
 2004, Nguyen Xuan Quynh et al. published on
"Composition of the species of invertebrates in the
wetlands conservation Van Long - Ninh Binh, including
11 species of 4 families of Rotifera.
State of the art: studies on Rotifera
in Vietnam
 In my college graduation paper (2008): “Correlation about density,
composition species between phytoplankton and the zooplankton
groups (Rotifera) in the Nhu Y river, Thua Thien Hue”.
 38 species were recorded, belonging to 11 families of Rotifera.
Taxonomy and biodiversity of Rotifers
in Thuy Tien Lake
• Thuy Tien Lake is
located south of
Hue City
• About 1.034 sq. m
• Natural lake
• Almost not affected
by human pollution
WORK IN THE LAB OF HUE COLLEGE
OF SCIENCE
WORK IN THE LAB OF HUE COLLEGE
OF SCIENCE
So far, we identified 13 species of
Rotifera at Thuytien lake
Lecane signifera (Jennings, 1896)
Lecane arcuata (Bryce, 1891)
WORK IN THE LAB OF HUE COLLEGE
OF SCIENCE
Brachionus quadridentatus Hermann, 1783
Lecane ruttneri Hauer, 1938
WORK IN THE LAB OF RBINS
• Daily work: identify Rotifera
• Research instruments:
microscope
• Reseach method:
comparison morphology
• (under the guidance of Dr.
H. Segers)
WORK IN THE LAB OF RBINS
Identified 20 species of Rotifera, of which 8
species are new records for Vietnam, and one
probably new species (Tetrasiphon)
WORK IN THE LAB OF RBINS
WORK IN THE LAB OF RBINS