An animal's fitness strongly depends on successful feeding, avoidance of predators and reproduction. All of these behaviours commonly involve chemosensation. As a consequence, when species' ecological niches and life histories differ, their chemosensory abilities need to be adapted accordingly. The intertidal insect Clunio marinus (Diptera: Chironomidae) has tuned its olfactory system to two highly divergent niches. The long-lived larvae forage in a marine environment. During the few hours of terrestrial adult life, males have to find the female pupae floating on the water surface, free the cryptic females from their pupal skin, copulate and carry the females to the oviposition sites. In order to explore the possibility for divergent olfactory adaptations within the same species, we investigated the chemosensory system of C. marinus larvae, adult males and adult females at the morphological and molecular level. The larvae have a well-developed olfactory system, but olfactory gene expression only partially overlaps with that of adults, likely reflecting their marine vs. terrestrial lifestyles. The olfactory system of the short-lived adults is simple, displaying no glomeruli in the antennal lobes. There is strong sexual dimorphism, the female olfactory system being particularly reduced in terms of number of antennal annuli and sensilla, olfactory brain centre size and gene expression. We found hints for a pheromone detection system in males, including large trichoid sensilla and expression of specific olfactory receptors and odorant binding proteins. Taken together, this makes C. marinus an excellent model to study within-species evolution and adaptation of chemosensory systems.

• MeSH
• biologická adaptace fyziologie   MeSH
• bulbus olfactorius metabolismus   fyziologie   MeSH
• Chironomidae metabolismus   fyziologie   MeSH
• čich fyziologie   MeSH
• čichové buňky metabolismus   MeSH
• hmyz metabolismus   fyziologie   MeSH
• hmyzí proteiny metabolismus   MeSH
• kladení vajíček fyziologie   MeSH
• kukla metabolismus   fyziologie   MeSH
• larva metabolismus   MeSH
• pohlavní dimorfismus * MeSH
• receptory pachové metabolismus   MeSH
• sensilla metabolismus   fyziologie   MeSH
• vodní organismy metabolismus   fyziologie   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH

• MeSH
• bulbus olfactorius imunologie   metabolismus   transplantace   MeSH
• homologní transplantace MeSH
• krysa rodu rattus MeSH
• neuroglie imunologie   metabolismus   MeSH
• novorozená zvířata MeSH
• proteiny nervové tkáně analýza   imunologie   metabolismus   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu rattus MeSH
• zvířata MeSH