Keratella mexicana,
an endemic species
from Mexico

Fourth Circular

XI International Symposium on Rotifera

Sponsored by the National Autonomous University of Mexico, Campus Iztacala

March 11-18, 2006
Mexico City, Mexico

This is Information Brochure 4 of 4.

We are just a few days away from the event. Please go through this circular and if you feel the necessity of making some changes in the Scientific Programme (included at the end of this circular) of presentations, please inform us immediately. Though most of the talks are confirmed, small changes may still be possible.

This circular may be slightly modified as necessary. So, please keep visiting the official website (given at the end of this circular) frequently.

Abstracts have been updated. See ABSTRACTS Rotifera XI.

Important note 1

Based on the information received, we have made arrangements to receive participants from the airport. In any case, please note the following contact telephone numbers:

SSS Sarma / S Nandini:
Office: 52 55 5623 1125 (if you call from Mexico City, just use the last 8 digits)
52 55 5623 1256 (if you call from Mexico City, just use the last 8 digits)

Residential: 52 55 5390 2918 (if you call from Mexico City, just use the last 8 digits)

Cell phone: 044 55 1960 0636

Important note 2

We have not yet got the travel itinerary from some of the participants. Please send us the information as soon as possible.

At the air port in Mexico City, you will find some persons with a sign board (of rotifer emblem) and title Rotifera XI. Please be on the lookout for the sign boards as you leave the customs.

Generally it may take one or two hours to clear the customs and passport control.

Important note 3

Hotel accommodation has been finalized based on the preferences you indicated to us through e-mail or regular posts. For logistic reasons, Camino Real (Perinorte, Tlalnepantla) has been chosen as the hotel for those who opted for 5* accommodation. The contact address of Camino Real (Perinorte) is:

via Dr. Gustavo Baz. No. 4001, Fracc. Industrial San Nicolás, Tlalnepantla, State of Mexico, Mexico, CP. 54030, Tel. +52 55 5321 5810;
FAX +52 55 5321 5808

There are plenty of restaurants around the places of stay for all the participants. Food in these restaurants is much cheaper than in hotels.

For those who opted for middle level hotel or the Mexican family type accommodation, the reservation has been done and we will transport the participants to the respective places.

Upon your arrival, we will transport all participants from the airport to the hotel. Please be patient at the airport (or Bus terminals for those who arrive by large distance buses), someone from the organizing committee will certainly be there to receive you.

The following are the final rates:
1. Hotel Camino Real (at Perinorte) (5* hotel) (with buffet breakfast free): Triple occupancy 110 US Dollars per 3 persons per night. Double occupancy 100 US dollars per 2 persons per night; Single occupancy: 90 US dollars. This hotel has 24 h free internet line in each room. However, you need to bring your own cable and laptop for using this facility.

2. Middle level hotels (with continental breakfast): 30 US dollars per person per night in double occupancy. Single occupancy: 40 US dollars per person per night.

3. Mexican Family Accommodation (breakfast included, self preparation): 20 US dollars per person per night) (Houses have been rented for the symposium period).

Important note 4

The current exchange rate of one US dollar = 10.3 pesos. It is advisable to pay your hotel costs in pesos. In general hotels give lower conversion rates than banks. Most automatic bank counters (ATMs, any time money counters) in Mexico charge about 4 dollars per operation. You may withdraw about 5000 pesos (about 480 dollars) daily depending on your bankcard restrictions. If you would like to pay with your credit card, then generally the conversion rate is a bit lower (about 1-2%).

Important note 5

Please do not exchange US dollars with unauthorized money exchangers. Banks are the best option. You will need to show your passport for identification.

Important note 6

Please print all the previous circulars as well as the present one as hardcopies and bring them with you. These will help you reach us quickly via telephone or they contain additional information which may be useful during your stay in Mexico.

Important note 7

Conference site, oral presentations etc.
We have PCs (not the MacIntosh) for power point presentations. However, if it is indispensable, the use of the Mac, then we will arrange accordingly.

The conference hall has also internet connection and is available during presentations. Besides, there are 10 computers with internet connection for the use of participants, free of cost.

Last Minute Registration: The last minute registration facility is intended to give an opportunity for those who miss the deadline to contribute for oral or poster presentations, but are still interested to share their knowledge with the rest of the participants. This facility is available until the last day of the conference. Since the last date for the submission of abstracts is over, any interested person may still participate in the symposium by paying the last minute registration fee of 150 US dollars. In that case, no contribution (for oral or poster presentations) from them will be entertained during the symposium nor the full text of the manuscript be considered for the proceedings to be published in Hydrobiologia.

Important note 8

There will be FOUR POST-ROTIFERA XI Circulars. These are intended mainly to inform the progress of the proceedings. Other relevant information will be also added from time to time. The official website will be closed after the release of Post Rotifera XI Circular 4. The Post Rotifera XI Circular 4 will appear once the proceedings have been formally published in Hydrobiologia.

The abstracts, group photo and associated material will remain on the official website until the last circular of the Post Rotifera XI is posted on the web.

We also intend to provide a link to Rotifera XII website, if requested by the organizers of Rotifera XII.

Thematic Units of the Symposium:

1. Morphology, Taxonomy, Zoogeography & Field Ecology
2. Feeding, Trophic Interactions, Behaviour, Autecology & Population Ecology
3. Molecular biology, Evolution, Genetics and Biochemistry
4. Aquaculture & Mass production
5. Ecotoxicology & Indicator organisms

Invited talks:

1. Molecular phylogeny of rotifers: recent advances (Martin V. Sørensen)
2. Rotifères du sel: salinity and rotifer ecology (Peter Starkweather)
3. Inducible defenses and community dynamics (Irene van der Stap)
4. Challenges and opportunities of different techniques of preparation of rotifer specimens (Wilko H. Ahlrichs)
5. Rotifer research in India: An overview (T. R. Rao)


1. Bar coded DNA: Application to Rotifer Phylogeny, Evolution and Systematics (Chairperson: C. William Birky, Jr.)
2. Population parameters: Application to Rotifer Ecology & Ecotoxicology (Chairperson: Terry Snell)
3. High Density Rotifer Cultures: Advantages and Applications (Chairperson: A. Hagiwara)
4. Rotifer Stock-Culture Centres (Chairpersons: S.S.S. Sarma & Roberto Rico-Martínez)

Since some participants have shown keen interest to participate in more than one workshops, as far as possible, we have arranged them accordingly.

The following have accepted to chair technical sessions during the symposium:

D Mark Welch
G Melone
H Segers
HJ Dumont
J Green
M Siva-Briano
MR Miracle
N. Walz
RD Gulati
RL Wallace
S Nandini
ME Castellanos-Paez

Suggestions for Oral / Poster presentations

Oral presentations: 20 minutes per contribution (15 min. presentation + 5 min. discussion). For invited talks, the duration is 30 minutes (25 min. presentation + 5 min. discussion)

Power point presentations
Standard Slide presentations
Overhead projectors (for transparent sheets)

The speakers should copy their presentations into the official computer of the symposium in advance. Individual / personal computers will not be allowed for presentations.

Matter related to the Proceedings

Authors whose contributions have been recommended by the chairperson of each session, may submit the full manuscript for the proceedings in the journal Hydrobiologia (Springer Publishers), before 18th April, 2006. Each manuscript will be reviewed and only those recommended by the reviewers will be included in the proceedings. The guest editors may issue provisional letters of acceptance. However, final acceptance of the manuscripts is subject to the approval of Editor in Chief of Hydrobiologia. The guest editors will not negotiate with the Editor in Chief of Hydrobiologia on behalf of the authors of the rejected manuscripts.

Manuscripts with a marginal reference to rotifers, or limnological / molecular approach without application to rotifers will not be considered for reviewing.

The cost of the special hardbound volume is 80 Euros (taxes and postage included). Those who are interested to obtain a copy of this special volume, may pay separately this amount in pesos or through credit card authorization at the reception desk of the symposium. After the conference, this amount will be immediately transferred to Springer detailing the names of the persons who intend to receive the special volume.


Scientific Programme

11th March, 2006 (Saturday)

Arrival of participants, arrangements of accommodation

12th March (Sunday)
Registration 10:00 A.M. to 5:00 P.M.
6:00 P.M. to 7: 30 Informal get together

13th March (Monday)
9:30 A.M. to 10:45 A.M. Inauguration
10:45 A.M. to 11:00 A.M. Coffee Break

Morphology, Taxonomy, Zoogeography & Field Ecology

Chairperson: H. J. Dumont.

11:00 A.M. to 11:30 A.M. Wilko H. Ahlrichs: Challenges and opportunities of different techniques of preparation of rotifer specimens

11:30 A.M. to 11:50 A.M. Christian D. Jersabek: Diversity and
zoogeography of Mongolian rotifers

11:50 A.M. to 12:10 P.M. G. Melone, C. Ricci, D. Fontaneto, R. Marotta & M. Caprioli: Water loss and morphological changes during desiccation in Macrotrachela quadricornifera (Rotifera, Bdelloidea)

12:10 P.M. to 12:30 P.M. Jim Green: Morphological variation of Keratella cochlearis in Myanmar in relation to zooplankton community structure

12:30 P.M. to 12:50 P.M. Scott Mills: The future of rotifer taxonomy: Genetics or Morphometrics? A cautionary tale from the Brachionus plicatilis species complex

12:50 P.M. to 13:10 P.M. Alois Herzig:The long-term aspect of the winter rotifer community of Neusiedler See (Austria), with special reference to the development of Rhinoglena fertöensis

13:10 P.M. to 14:10 P.M. Lunch


Session 2

Morphology, Taxonomy, Zoogeography & Field Ecology (continued)

Chairperson: Jim Green

14:10 P.M. to 14:30 P.M. S. Nandini, Martín Merino & S.S.S. Sarma: Seasonal and depth-related zooplankton distribution in the reservoir Valle de Bravo (State of Mexico, Mexico) with emphasis on rotifers

14:30 P.M. to 14:50 P.M. Miloslav Devetter: Seasonal development and vertical distribution of soil rotifer populations in South-Bohemian beech forest

14:50 P.M. to 15:10 P.M. Jolanta Ejsmont-Karabin: Rotifer abundance and diversity in benthic microhabitats of a littoral zone in Lake Mikołajskie (North-eastern Poland)

15:10 P.M. to 15:30 P.M. Heike Zimmermann-Timm, Henry Holst & Hartmut Kausch: Spatial Dynamics of Rotifers in a Large Lowland River, the Elbe, Germany - How important are retentive shoreline habitats for the plankton community?

15:30 P.M. to 15:50 P.M. E.J. Walsh, T. Schröder, M.L. Bonilla & R.L. Wallace: Rotifera of Big Bend National Park, Texas (USA): species richness, turnover, and interannual variation among selected sites

15:50 P.M. to 16:10 P.M. Coffee break


Session 3

Morphology, Taxonomy, Zoogeography & Field Ecology (continued)

16:10 P.M. to 16:30 P.M. Wilko H. Ahlrichs, Ole Riemann,Sabrina Fiedler, Eike Wilts & Claus Fischer: The labium of the Rotifera – a morphologically and phylogenetically interesting structure of the rotatory organ.

16:30 P.M. to 16:50 P.M. Gustavo Emilio Santos-Medrano, Saraí Hernández-Flores & Roberto Rico-Martínez: An analysis of the factors Influencing the presence of males in the freshwater rotifer Lecane quadridentata (Rotifera: Monogononta)

16:50 P.M. to 17:30 P.M. Group Photograph

17:30 P.M. to 19:00 P.M. Workshop Session 1
Chairperson: C. William Birky, Jr.

Bar coded DNA: Application to rotifer phylogeny, evolution and systematics

14th March (Tuesday)

8:30 A.M. to 10:00 A.M. Drive to UAM Xochimilco

10:00 A.M. to 14:30 P.M. Poster Session (Technical Session 4)

S. Nandini,
Maria Elena Castellanos-Paez,
M.R. Miracle &
Marcelo Silva-Briano

Details of poster presentations (i.e., serial number and / or the order) will be available on Monday, 13th March, 2006

14:30 P.M. to 18:00 P.M. Lunch, Boat Trip to Lake Xochimilco

18:00 P.M. to 20:00 P.M. Return to hotel/residence


15th March (Wednesday)


Feeding, Trophic Interactions, Behaviour, Autecology & Population Ecology

Chairperson: Norbert Walz

9:00 A.M. to 9:30 A.M. Peter Starkweather: Rotifères du sel: salinity and rotifer ecology

9:30 A.M. to 9:50 A.M. Morten Omholt Alver: Individual-based modelling for the prediction of rotifer population dynamics

9:50 A.M. to 10:10 A.M. Jorge Ciros-Pérez, Elizabeth Ortega-Mayagoitia, Mayeli Sánchez-Martínez, & Javier Alcocer: Are deep, oligotrophic lakes inhospitable environments for rotifers?

10:10 A.M. to 10:30 A.M. Gregor F. Fussmann, Gregory Kramer & Mahmoud Labib: Incomplete induction of mixis in Brachionus calyciflorus: patterns of reproduction at the individual level

10:30 A.M. to 10:50 A.M. E.M. García-Roger, M.J. Carmona & M. Serra: Rotifer diapausing egg banks: past studies and recent findings

10:50 A.M. to 11:20 A.M. Coffee break

11:20 A.M. to 19:00 P.M. Visit to Pyramids and return to hotel


16th March (Thursday)


Feeding, Trophic Interactions, Behaviour, Autecology & Population Ecology (continued)

Chairperson: Robert L. Wallace

9:00 A.M. to 9:30 A.M. Irene van der Stap, Matthijs Vos & Wolf M. Mooij: Inducible defenses and community dynamics

9:30 A.M. to 9:50 A.M. Atsushi Hagiwara & Lena H. Asano: The relationship between trophi and body size of rotifer Brachionus plicatilis

9:50 A.M. to 10:10 A.M. S.S.S. Sarma & S. Nandini: Small prey size is an effective deterrent against predation: a case study on two species of Asplanchna and three brachionid prey.

10:10 A.M. to 10:30 A.M. M.R. Miracle, M.T. Alfonso & E. Vicente: Fish and nutrient effects on rotifers in a shallow lake. A mesocosm experiment.

10:30 A.M. to 10:50 A.M. Rick Hochberg: 3-D Cerebral Architecture and innervation in Asplanchna (Rotifera: Asplanchnidae)

10:50A.M. to 11:10 A.M. H. J. Dumont: Representatives of freshwater jelly rotifers: Asplanchna (title tentative)

11:10A.M. to 11:30 A.M. Coffee break



Feeding, Trophic Interactions, Behaviour, Autecology & Population Ecology (continued)

Chairperson: Hendrik Segers

11:30 A.M. to 11:50 A.M. Terry W. Snell, Jerry Kim, Edgar Zelaya & Rachel Resop: Mate choice in Brachionus: Male ability to discriminate female fitness

11:50 A.M. to 12:10 P.M. Claus-Peter Stelzer, Jennifer Härting & Mathilde Bénard: Unilateral induction of sex between freshwater and saline Brachionus spp. (Monogononta, Rotifera).

12:10 P.M. to 12:30 P.M. Norbert Walz, Ines Jäger & Franz Hölker: Chaoborus predation on zooplankton: no preference for rotifers

12:30 P.M. to 12:50 P.M. M. Yúfera: Swimming behaviour of Brachionus plicatilis in response to food concentration and its relation to feeding rates.

12:50 P.M. to 13:10 P.M. Guntram Weithoff & Alexander Wacker: The mode of nutrition of mixotrophic flagellates determines their food quality for rotifers.

13:10 P.M. to 13:30 P.M. S. Campillo, E. M. García-Roger, M. J. Carmona & M. Serra: Genetic and ecological differentiation among rotifer populations in Eastern Spain.

13:30 P.M. to 14:30 P.M. Lunch



Molecular biology, Evolution, Genetics and Biochemistry

Chairperson: David Mark Welch

14:30 P.M. to 14:30 P.M. Martin V. Sørensen: Molecular phylogeny of rotifers: recent advances

14:30 P.M. to 14:50 P.M. C. William Birky, Jr.: Genetic diversity in sexual and asexual rotifers

14:50 P.M. to 15:10 P.M. Martín García-Varela & Steven A. Nadler: Phylogenetic relationships among syndermata inferred from nuclear and mitochondrial gene sequences

14:50 P.M. to 15:10 P.M. Elizabeth J. Walsh & Racquel L. Garcia: Genetic variation in Plationus patulus and its relationship to brachionid rotifers

15:10 P.M. to 15:30 P.M. Thomas Schröder & Elizabeth J. Walsh: Cryptic speciation in the cosmopolitan Epiphanes senta complex (Monogononta, Rotifera)

15:30 P.M. to 16:00 P.M. Coffee break


Molecular biology, Evolution, Genetics and Biochemistry (Contd.)

Chairperson: G. Melone

16:00 P.M. to 16:20 P.M. David B. Mark Welch: Phylogenetics and ribosomal gene evolution in Bdelloidea

16:20 P.M. to 16:40 P.M. Alan Tunnacliffe, Brian McGee & Natalia N. Pouchkina-Stantcheva: Doing it differently: the bdelloid rotifer’s approach to anhydrobiosis

16:40 P.M. to 17:00 P.M. Martin V. Sørensen: Rotifer phylogeny inferred from a combined approach of four molecular loci and morphology.

17:00 P.M. to 17:20 P.M. Jinqiu Wang & Tianyu Wang: The clone and primary analysis for meiosis related genes (BpDMC1) of the rotifer Brachionus plicatlis

17:20 P.M. to 18:50 P.M.

Workshop session 2
Chairperson: A. Hagiwara

High Density Rotifer Cultures: Advantages and Applications

Workshop Session 3
Chairpersons: S.S.S. Sarma &
R. Rico-Martínez

Rotifer Stock-Culture Centres


17th March (Friday)


Chairperson: RD Gulati

9:00 A.M. to 9:30 A.M. T. Ramakrishna Rao: Rotifer research in India: An overview

9:30 A.M. to 9:50 A.M. M. Strojsova, J. Vrba & J. Seda: Rotifer digestive enzymes: Progress in their direct detection using the ELF method

9:50 A.M. to 10:10 A.M. John J. Gilbert / Thomas Schröder: Intraclonal variation for propensity to produce mictic daughters in
several rotifer species: variation among replicate females and with maternal age

10:10 A.M. to 10:30 A.M. Célia Joaquim-Justo& Terry W. Snell: Effect of anti-androgenic substances on the sexual reproduction of the rotifer Brachionus calyciflorus

10:30 A.M. to 10:50 A.M. Isidoro Rubio-Franchini & Roberto Rico-Martínez: Determination of lead in zooplankton, water and sediments from El Niágara reservoir in Aguascalientes (Mexico)

10:50 A.M. to 11:20 A.M. Coffee break

11:20 P.M. to 13:00 P.M.
Workshop Session 4.
Chairperson: Terry Snell

Population parameters: Application to rotifer ecology & ecotoxicology

13:00 P.M. to 14:00 Lunch

14:00 P.M. to 16:30 P.M. General Discussion, Proposals for Rotifera XII & Conclusion of the Symposium

18:00 P.M. to 22:00 P.M. Symposium Dinner


18th March (Saturday)

7:30 A.M. Post-Symposium Excursion / Departure


The organizing committee

SSS Sarma (Mexico) S Nandini (Mexico)
Roberto Rico Martínez (Mexico) RD Gulati (The Nethelands)
RL Wallace (USA) HJ Dumont (Belgium)
Marcelo Silva Briano (Mexico) Mario Alfredo Fernández Araiza (Mexico)
Alfonso Lugo Vásquez (Mexico) Maria Elena Castellanos Paez (Mexico)
Jose Luis Gama Flores (Mexico) Gabriela Garza Mouriño (Mexico)



Prof. S.S.S. Sarma, Organizing Secretary, Rotifera XI
Laboratory of Aquatic Zoology, Building: U.M.F.
Division of Research and Postgraduate Studies
National Autonomous University of Mexico, Campus Iztacala
AP 314, CP 54090, Los Reyes, Iztacala, Tlalnepantla
State of Mexico, Mexico.
Tel: +52 55 56231125 FAX +52 55 5623 1256
Residential Tel./FAX: +52 55 5390 2918


Official Web site:


M. C. Ramiro Jesús Sandoval

Dr. Ignacio Peñalosa Castro
Secretario General Académico

Lic. Roque Jorge Olivares Vázquez
Secretario de Desarrollo y Relaciones Institucionales

C. D. Ana Graf Obregón
Secretaria de Planeación, Cuerpos Colegiados y Sistemas de Información

C. P. Isabel Ferrer Trujillo
Secretaria Administrativa

Dra. Patricia Dávila Aranda
Jefa de la División de Investigación y Posgrado

1st Circular

2nd Circular

3rd Circular