General introduction to study on Rotifera in Viet Nam

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

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

• 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

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

"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.

State of the art: studies on Rotifera

in Vietnam

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

Lecane arcuata (Bryce, 1891)

Lecane signifera (Jennings, 1896)

WORK IN THE LAB OF HUE COLLEGE

OF SCIENCE

So far, we identified 13 species of

Rotifera at Thuytien lake

Brachionus quadridentatus Hermann, 1783 Lecane ruttneri Hauer, 1938

WORK IN THE LAB OF HUE COLLEGE

OF SCIENCE

WORK IN THE LAB OF RBINS

microscope

comparison morphology

H Segers)

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