An introduction to the ROtifera

Slides:



Advertisements
Similar presentations
Lecture Goals Introduction to the major groups of zooplankton
Advertisements

By Josh Baker and Stephen Corbin. S.B. * Definition-A type of an animal that filters the water it lives in to get food. * Body system- No body systems.
Nematomorpha Biodiversity Institute of Ontario Also known as: -Gordian Worms -Horsehair Worms.
Chapter 27 Worms and Mollusks
Vocabulary Review Ch 34 – Flatworms, Roundworms, and Rotifers.
Pseudocoelomates : Round Worms Chapter 11. Round Worms 2 Main Phlya – Nematoda “thread worm” ex: hookworms, pin worms, ascaris, filarial worms – Rotifera.
Ch 11 Pseudocoelomates “soo-doe-see-low-mates”
Section 2: Roundworms and Rotifers
Pseudocoelomate Animals, Chapter 9, Zoology
 Platyhelminthes, Nemtoda, and Annelida.  There are three major groups of worms: o 1) Flatworms (Phylum Platyhelminthes) o 2) Roundworms (Phylum Nematoda)
Trinh Dang Mau Hue college of science. Phylum Rotifera Microscopic aquatic animals Small size: µm Ca species Highly efficient reproduction.
Chapter 34 Table of Contents Section 1 Platyhelminthes
Kingdom Animmalia By Kendall Reyes Diana Ramirez Itcelia Segoviano.
CHAPTER 33 INVERTEBRATES Section C1: Protostomia: Lophotrochozoa
Rotifer Identification: The Brachionidae Hue University Rotifer Taxonomy workshop 6-12 March 2010.
Marine Invertebrate Zoology
Flatworms, Roundworms, & Segmented Worms
The Acoelomates (continued)
ZOOPLANKTON PRODUCTION IN AQUACULTURE Assoc. Prof. Serpil SERDAR Ege University, Faculty of Fisheries.
Unsegmented Worms. Flatworms Belong to the phylum platyhelminthes. (Plat = flat) There are three classes: –Turbellaria –Trematoda –Cestoda.
Acrobeles complexus Ch 11 Pseudocoelomates Ch 11 Pseudocoelomates “soo-doe-see-low-mates”
End Show Slide 1 of 41 Copyright Pearson Prentice Hall Biology.
FLAT WORMS.
Chapter 34 Section 2 Phylum Nematoda & Rotifera. Phylum Nematoda Roundworms (pseudocoelomates) Bilaterally symmetrical 1mm-120mm (4 feet) Digestive tract.
PSEUDOCOELOMATE PHYLA
Chapter 36: Flatworms, Roundworms, and Rotifers 36-1 Phylum Platyhelminthes 36-2 Phylum Nematoda and Phylum Rotifera.
Worms Chapters 26.3, 26.4, and 27.2.
RotiferRotifer. Phylum Rotifera From the Latin Rota a wheel and Ferre to bear or carry Rotifera is divided into two classes, the Digononta and the Monogononta.
Phylum Rotifera Members of the Phylum Rotifera are small ciliated organisms found mainly in freshwater The ciliated wheel organ (corona) is characteristic.
The Pseudocoelomate Body Plan: Aschelminthes
Jasira Ziglar Kenneth Cortavarria
Zooplankton.
The Lophotrochozoa 1.
How do the acoelomates fit in? Porifera unknown common ancestor Cnidaria triploblastic organ level of organization Platyhelminthes protonephridia cephalization.
PSEUDOCOELOMATES PHYLUM NEMATODA PHYLUM ROTIFERA.
Edit the text with your own short phrase. The animation is already done for you; just copy and paste the slide into your existing presentation. Chelsea.
Live food aquaculture training course Rotifer Biology and Strains.
Phylum Rotifera.
Pseudocoelomates Aschelminths.
Phylum Rotifera > 1,800 described species < 1 mm Complex, variety of body forms Solitary Pseudocoelomate Generally freshwater.
__________ not only in size, but in development __________ essential for survival __________ smallest unit of life __________ breathing, eating, digestion,
Zooplankton Protozoa (heterotrophic protista) Rotifera Arthropoda
Lesson Overview Lesson OverviewReproduction Lesson Overview 28.3 Reproduction.
Phylum Rotifera Microscopic Animals. Phylum Rotifera Rotifera - Latin “to bear a wheel”. Rotifers have an anterior corona. Corona – –a ciliated organ.
Unsegmented Worms.
Bilaterally Symmetrical Worms Platyhelminthes, Nemertea, Nematoda, Annelida, and 4 unique groups.
3 Worm Phyla (long, thin bodied animals) All eumatazoans (have true tissues) All have bilateral symmetry Develop a coelom → body cavity 1. Phylum Platyhelminthes.
9/13`/ Finish Flatworm lab and follow up. Turn in LAB to front bin!!!! 2. Get paper out to take notes on Rotifers. 3. TEST IS Thursday!!! ORGANIZE.
Rotifer classification and trophi morphology
Chapter 27: Mollusks. I. Taxonomy Kingdom: Animalia – Phylum: Mollusca (soft)
Phylum Nematoda and other Pseudocoelomate Animals, Chapter 9, Zoology
Rotifer Identification: Lecanidae
What is a "Living Thing"? “GROMERAH”
Traits for species in WoRMS EMODNET WP2.2
Flatworms, Roundworms, & Segmented Worms
Phylum Nematoda and other Pseudocoelomate Animals, Chapter 9, Zoology
Simple Marine Animals.
ROTIFERS.
PSEUDOCOELOMATES PHYLUM NEMATODA PHYLUM ROTIFERA.
Species that reproduce sexually have an advantage over those that reproduce asexually when external conditions change. This is how organisms have become.
Phylum Platyhelminthes
Or-The Wonderful World of Sponges
Cell Tissue Organ Adaptation Sexual Reproduction
The PSEUDOCOELOMATE Condition PSEUDOCOELOM
Marine Biotechnology Lab
PSEUDOCOELOMATES PHYLUM NEMATODA PHYLUM ROTIFERA.
Phylum Nematoda and other Pseudocoelomate Animals, Chapter 9, Zoology
Rotifers and Bryozoans
2/8/2013 Finish Flatworm lab and follow up. Turn in LAB Notebook!
Makenna Fisher and Tyler Smith
Presentation transcript:

An introduction to the ROtifera Dr Hendrik Segers Belgian Biodiversity Platform Royal Belgian Institute of Natural Sciences Brussels, Belgium

The Rotifera What are Rotifera? Eating… ….and not be eaten Survival through time and space: Reproduction and dispersal Problems and opportunities Hue University Rotifer Taxonomy workshop 6-12 March 2010

Phylum Rotifera Ca. 2030 species: Small (40-3500µm) worms 3 Seisonida, 461 Bdelloidea, 1566 Monogononta Small (40-3500µm) worms Hue University Rotifer Taxonomy workshop 6-12 March 2010

Phylum Rotifera Predominantly freshwater, some marine, brackish water; Highly abundant: 103.L-1 to 105.L-1: soda waters; One of the main zooplankton groups Hue University Rotifer Taxonomy workshop 6-12 March 2010

Phylum Rotifera Uses: Aquaculture: Brachionis 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) … Hue University Rotifer Taxonomy workshop 6-12 March 2010

Phylum Rotifera Pelagic, littoral, interstitial; Solitary or colonial Free-living or sessile Epizoic, parasitic; limnoterrestrial Hue University Rotifer Taxonomy workshop 6-12 March 2010

Phylum Rotifera Morphology: Body: head, trunk, foot Head: corona Body: lorica + pseudocoelom, incl. digestive, excretory, reproductive system Foot (no tail) with attachment glands Hue University Rotifer Taxonomy workshop 6-12 March 2010

Unique Features Morphology: Reproduction Anhydrobiosis Corona ciliata; Mastax with trophi; Lorica; (Eutely, syncytia, unique type of protonephridia) Reproduction Anhydrobiosis Hue University Rotifer Taxonomy workshop 6-12 March 2010

Eating… Creation of water current by corona ciliata: Locomotion: swimming Feeding: filtering Food particle processing by mastax with trophi Hue University Rotifer Taxonomy workshop 6-12 March 2010

Corona Higly adaptible! Hue University Rotifer Taxonomy workshop 6-12 March 2010

Mastax with trophi Differentiation of the pharynx Mastax = Muscular organ containing Hard elements = trophi Hue University Rotifer Taxonomy workshop 6-12 March 2010

Trophi Higly adaptible! Different “types” Grinding For Grasping As « piston » Higly adaptible! Different “types” Hue University Rotifer Taxonomy workshop 6-12 March 2010

… and not being eaten Lorica: Intracytoplasmatic lamina Hue University Rotifer Taxonomy workshop 6-12 March 2010

… and not being eaten Protection by lorica Function: Stiffness Buoyancy Protection: passive Active Hue University Rotifer Taxonomy workshop 6-12 March 2010

Lorica Phenotypic plasticity: morphological adaptation to environment Simple: cyclomorphosis Complex: predator-induced Hue University Rotifer Taxonomy workshop 6-12 March 2010

Cuticle Gelatinous glycocalyx Secreted by tegumental glands (trunk, foot) Function: Protection: Chemical (unpalatability) Mechanical Hue University Rotifer Taxonomy workshop 6-12 March 2010

Reproduction Seisonida: bisexual, sexual repoduction Bdelloidea: exclusive asexual parthenogenesis Monogononta: heterogony Hue University Rotifer Taxonomy workshop 6-12 March 2010

Reproduction Heterogony Rapid population growth Production of resting eggs Hue University Rotifer Taxonomy workshop 6-12 March 2010

Resting "eggs" Encapsulated embryos; Draught-resistent, hatching at specific clues; Survival through time and space; Highly effective dispersal stages Hue University Rotifer Taxonomy workshop 6-12 March 2010

Bdelloids: anhydrobiosis Survival through metabolic inactivity; Draught-resistent, reversal at specific clue; Survival through time and space; Highly effective dispersal stages Hue University Rotifer Taxonomy workshop 6-12 March 2010

Constraints for studying Rotifera… Size… Taxonomic impedement Cryptic speciation e.g., Brachionus plicatilis complex Sampling and sample handling Hue University Rotifer Taxonomy workshop 6-12 March 2010

… and opportunities: The Bdelloidea of Thailand Ecology and diversity of sessile rotifers Molecular and morphological approach combined: Cryptic diversity of Rotifera Phylogeny Genetics of bdelloids Hue University Rotifer Taxonomy workshop 6-12 March 2010

Thank you for your attention Hue University Rotifer Taxonomy workshop 6-12 March 2010