20-23 september 2017. Pécs - Hungary
Satellite events
Invertebrate models in studying neuronal effects of environmental stimuli (satellite symposium by ISIN: International Society for Invertebrate Neuroscience)
Invertebrate models in studying neuronal effects of environmental stimuli (satellite symposium by ISIN: International Society for Invertebrate Neuroscience) 2017-09-21 - 13:00-15:30
Venue: Plenary Hall
This satellite symposium will present some invertebrate models (molluscs, insects) where neuronal effects of various environmental stimuli (e.g. odors, light, alelochemicals, pharmaceutical contaminants) could be examined at cellular and/or system levels. Organized by the International Society for Invertebrate Neuroscience.

Dr. Zsolt Pirger
MTA-ÖK BLI NAP_B Adaptive Neuroethology, Department of Experimental Zoology,
Balaton Limnological Institute, MTA-CER, Tihany, Hungary

 

SPEAKERS:


Dr. Dieter Wicher
Neurophysiology, Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology
Jena, Germany 

"Tuning Insect Odorant Receptors "

Among the receptors insects use to detect volatile chemical information the odorant receptors evolved in parallel to the onset of insect flight. A hallmark of this receptor type is the ability to regulate the sensitivity according to previous odor contacts which produces a short term memory. This property might offer an advantage for odor localization during flight. The talk presents a current view on mechanisms that may contribute to OR sensitization, and include receptor protein phosphorylation and calcium signaling within the compartments of olfactory sensory neurons.  

 

 

Michael J Bok
Lund Vision Group, Department of Biology, Faculty of Science
Lund University, Sweden 

"The diverse distributed visual systems of fan worms" (Michael J Bok & Dan-Eric Nilsson )

Fan worms (Annelida: Sabellidae) posses a spectacular array of distributed compound eyes on their titular feeding tentacles.  These eyes govern a startle response that allows the worms to rapidly withdraw into their tubes when threatened by looming predators.  While this behavior is simple and well conserved within the family, the arrangement of their tentacular eyes is quite diverse among species, with some utilizing a single pair of large consolidated compound eyes on two tentacles while others have hundreds of smaller compound eyes or ocelli scattered all over the outsides of every tentacle.  How do these two different strategies manage the same behavior, and what are their relative benefits or drawbacks?  We find that these eyes make use of neural pathways not previously implicated in visual systems, lending credence to the idea that these eyes represent an independent evolutionary elaboration unique to fan worms.  Furthermore we consider possible models for the visual processing of signals from these eyes for shadow and motion detection, or perhaps even low resolution vision.

 

Prof. Elena E. Voronezhskaya
Laboratory of Developmental Neurobiology,
Institute of Developmental Biology, Russian Academy of Sciences
Moscow, Russia 

"Early events of molluscan neurodevelopment as sensitive tool for environmental monitoring"

Most of the aquatic invertebrates have complex life cycle with free swimming or encapsulated larvae. Larval stage is particularly important for population survival and dispersion and possesses specialized adaptation mechanisms. During my talk I will present results for more than a twenty years investigation of larval nervous system and sensory structures of model gastropod and bivalve molluscs. I will demonstrate how these structures and their neurotransmitters link the environmental signal with respective adaptive changes in development and behavior. Our results demonstrate that sensory-motor system of the larvae reflects to variety of biotic and abiotic stimuli and thus may represent a very sensitive tool for environmental monitoring.

 


Dr. Joris M. Koene
Faculty of Earth and Life Sciences, Department of Ecological Science, Vrije Universiteit
Amsterdam, The Netherlands

"The evolutionary consequences of being male and female at the same time"

While ultimately the outcome of successful reproduction – fertilisation of eggs and the production of surviving offspring – is relevant for how these processes evolve, a thorough understanding of the underlying, proximate mechanism is essential if one want to interpret evolutionary outcomes properly. Comparing the use of pheromones and allohormones across different species, with different sexual systems, is one way of uncovering similarities and differences in how they have evolved to regulate their reproductive processes. I will present experimental work on hermaphroditic snails that will illustrate that it is relevant to consider the mode of sexual system when addressing the neurobiology of reproduction. I will show that, on the one hand, hermaphroditic animals regulate their male and female reproduction via largely non-overlapping neurobiological wiring and neuroendocrine substances, which is not necessarily the case in separate sexed species. On the other hand, because both regulatory systems are present in each individual, this also offers opportunities for “hijacking” their partner’s reproductive system in such a way that their own reproductive success is enhanced.

 


Dr. Zsolt Pirger
MTA-ÖK BLI NAP_B Adaptive Neuroethology, Department of Experimental Zoology
Balaton Limnological Institute, MTA-CER, Tihany, Hungary

"From neurons to behaviour: complex changes induced by environmental contaminants"