American University
Browse
thesesdissertations_5029_OBJ.pdf (1.38 MB)

Comparative study of the sensory system between surface and cave dwelling populations of the amphipod Gammarus minus

Download (1.38 MB)
thesis
posted on 2023-08-04, 19:54 authored by Amal Nadel

In this study, a comparison of the brain region sizes and morphology was done between individuals of spring and cave dwelling populations of the amphipod Gammarus minus. The particular areas of interest, in the brain of these animals, were the protocerebrum at the optic lamina ganglionaris (optic ganglion) level and the deuterocerebrum at the olfactory lobe level. The animals' heads were fixed with Karnovsky's fixative, dehydrated, embedded in Immuno-bed, sectioned and stained with toluidine blue and eosin. Semi-serial sections were examined and the results showed that the external differences between both populations were also seen at the brain level. In other words, the diameter of the optic ganglion is significantly larger in the spring populations while the diameter of the olfactory lobe is significantly larger in the cave populations, suggesting a pattern of adaptation to the habitats.

History

Publisher

ProQuest Dissertations & Theses

Language

English

Notes

Thesis (M.S.)--American University, 1993.

Handle

http://hdl.handle.net/1961/thesesdissertations:5029

Media type

application/pdf

Access statement

Unprocessed

Usage metrics

    Theses and Dissertations

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC