par Saha, Anik 
Promoteur Fratini, Sara
Co-Promoteur Cannicci, Stefano;Iannucci, Alessio
Publication Non publié, 2021-08-31
Promoteur Fratini, Sara
Co-Promoteur Cannicci, Stefano;Iannucci, Alessio
Publication Non publié, 2021-08-31
Mémoire
| Résumé : | The subphylum Crustacean is one of the largest group of arthropods including many different forms of life, living in all environments. Interestingly, the group shows a great variation in terms of genome size at various taxonomic level. Polyploidization and accumulation of non-coding elements are the major sources of having large genome. This characteristic can affect fitness especially in unstable environment. Phylogeny, morphology, environment characteristics and life history strategies are considered to lead genome size differences in crustaceans. In this study, crustacean’s genome size is assessed through taxonomy and eco-physiological properties. For this meta-analysis, three orders of crustaceans, Isopoda, Amphipoda and Decapoda, are considered with their eco-physiological properties included habitat, respiration, excretion and development. This study found genome size differences in amphipod’s infraorder and decapod’s superfamilies. Habitat explain genome size variation for isopods and decapods but not for amphipods. Regarding respiration, differences were found in isopods and decapod’s genome size. No differences in genome size were found in relation to excretion for any orders. Development strategy clearly explain decapod’s genome size variation, with species with direct development possessing larger genomes. A significant negative relationship was also found between decapods’ genome size and number of zoeal stages, although the model explained only 23% of the total variation. This study provides some new insights about genome size variation respect to eco-physiological traits regarding three orders of crustaceans. |
