הרצאתה של ד"ר נועה שנקר תתקיים ב7 בינואר בשעה 13.00 בכיתת המוזיאון. הנושא:

Please do not judge an ascidian by its cover

Abstract:
Ascidians (Phylum: Chordata, Class: Ascidiacea), or sea squirts, are the largest and most diverse class of the sub-phylum Tunicata (also known as Urochordata). They comprise approximately 3000 described species found in all marine habitats from shallow water to the deep sea. There are no freshwater species, and most cannot tolerate salinities below about 20‰. Recent phylogenomic studies suggest that they are actually the sister group to the vertebrates. Ascidian systematics is the domain of specialists, but a keen observer can differentiate the orders and most families, and recognize the well-described common species. Since ascidian taxonomy is based on the structure of the branchial sac, and the position of the gonads and gut loop, it is very difficult to identify ascidians without dissecting them. Therefore, you "cannot judge an ascidian by its cover”. Underwater photographs can provide much information and assist in distinguishing one species from another only if the fauna of the given region has already been studied.In the current presentation I will provide an overview of the current trends in ascidian research, and will emphasize the importance of accurate identification to species level by professional taxonomists. 
 
רישמו לפניכם את תאריכי ההרצאות הבאות:

4.2.2013 שי מאירי
4.3.2013 פרטים יפורסמו בקרוב
22.4.2013 Oliver Nihuis (in English)
20.5.2013 פרטים יפורסמו בקרוב
17.6.2013 אחיק דורצ'ין