Relationship between morphological traits and environment-induced fitness alterations in the Mediterranean mussels (Mytilus galloprovincialis Lamarck, 1819)

Ronta, Tea (2016) Relationship between morphological traits and environment-induced fitness alterations in the Mediterranean mussels (Mytilus galloprovincialis Lamarck, 1819). Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The morphology of bivalves is a combined result of genetic and environmental factors. The main objective of this study was to determine the relationship between fitness and morphometric traits in a Mytilus galloprovincialis population, exposed at 6 locations in the environments of differing degrees of pollution. Mussels exposed to polluted environments survived longer in stress on stress response test. Data were collected on 13 shell morphological traits for 900 individuals. Shell width correlated with better survival irrespective of the environment the mussels were exposed to. Smaller volume and longer posterior adductor muscle scar increased the survival of mussels that were preexposed to environments of lower anthropogenic pollution, and position of the posterior retractor muscle correlated with the survival of the mussels exposed in polluted environments. Shell height exhibited lowest degree of fluctuating asymmetry, and the traits related to posterior retractor muscle the highest. Higher asymmetry of VPR – a trait related to posterior retractor position correlated with longer survival in mussels exposed to the environments of lower anthropogenic pollution. This study showed correlation between particular morphological traits and fitness of the Mediterranean mussel that was also environmentally conditioned.

Item Type: Thesis (Diploma thesis)
Keywords: morphometry, environmental factors, stress on stress test, fluctuating asymmetry
Supervisor: Štambuk, Anamaria
Date: 2016
Number of Pages: 56
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 24 Mar 2016 15:16
Last Modified: 24 Mar 2016 15:16
URI: http://digre.pmf.unizg.hr/id/eprint/4624

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