ATTENTION/WARNING - NE PAS DÉPOSER ICI/DO NOT SUBMIT HERE

Ceci est la version de TEST de DIAL.mem. Veuillez ne pas soumettre votre mémoire sur ce site mais bien à l'URL suivante: 'https://thesis.dial.uclouvain.be'.
This is the TEST version of DIAL.mem. Please use the following URL to submit your master thesis: 'https://thesis.dial.uclouvain.be'.
 

Species boundaries and adaptive potential in Ellobiids snails

Malice, Louise
(2025)

Files

Malice_1568-23-01_2025.pdf
  • Closed access
  • Adobe PDF
  • 1.8 MB

Details

Supervisors
Dennis, Alice
Faculty
Faculté des sciences
Degree label
Master [120] en biologie des organismes et écologie, à finalité approfondie
Abstract
The study explores the cryptic species complex of Melampus bidentatus through karyotyping, with a focus on resolving the species boundaries and understanding the evolutionary processes involved. Karyotype analysis was initially attempted using colchicine treatment to induce cell division, but no conclusive results were obtained, possibly due to issues with tissue digestion, cell resistance to treatment, or slide preparation. Additionally, the study investigates salinity responses through RNA-seq analyses. Snails, Myosotella sp., were exposed to varying salinities, and differential gene expression was analyzed across three conditions (5, 20, and 35 ppt). However the data could not be ready in time, thus data analyses was made on Melampus jaumei, species part from de cryptic complex, exposed to various salinity conditions (5, 20 and 35 ppt). This work contributes to the understanding of genetic mechanisms underlying salinity tolerance in littoral gastropods to contribute to the understanding of geographical partitioning and many future investigations are possible.