Itsasaldiak eta urte-sasoiak oskol-dimentsioen eta oskol-dentsitatearen moldapena dakar Mytilus galloprovincialis muskuiluan
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Abstract
Muskuiluetan, oskolaren osotasunak biziraupena zehazten duen heinean, hautespen-presio indartsu baten menpe dago, eboluziorako eragile oinarrizkoa bilakatzen duena. Ikerketa honetan, urtaro eta itsasaldiak izan dezaketen eragina aztertu da oskolaren dentsitatean eta oskol dimentsioen eskala-erlazioetan. Muskuiluak bi hilabetetan (maiatza eta azaroa) eta bi populazioetatik (mareartea eta mareazpia) jaso ziren. Populazio-jatorriak eragin handia dauka muskuiluen oskol-forman, egokitzapen morfologiko espezifiko bat izanik marearteko habitat gogorrera moldatzeko. Oskol dentsitatea, aldiz, urtaroaren arabera aldatzen da: oskol sendoagoak ageri dira maiatzean, neguko baldintzen isla izan daitekeena. Emaitzek muskuilu-hazkuntza ulertzeko baliagarriak dira, hainbat aplikazio zientifiko dituztelarik; hala nola, ekologian edo toxikologian.
Because shell integrity determines survival, shell form is subject to strong selection pressure, turning it a fundamental evolutionary driving force. In the present study, the alleged effect of both season and habitat upon shell dimensions and density have been analysed. Mussels where sampled in May and November, and from two different populations (intertidal and subtidal). The results show a major impact of the population origin upon the shell form of mussels, which might be a specific morphological adaptation to the harsh intertidal environment. Shell density, conversely, changes with seasonality: denser shells appear in May, which may be an answer to the winter conditions. The results are useful to understand mussel growth, which has in turn many scientific applications.
Because shell integrity determines survival, shell form is subject to strong selection pressure, turning it a fundamental evolutionary driving force. In the present study, the alleged effect of both season and habitat upon shell dimensions and density have been analysed. Mussels where sampled in May and November, and from two different populations (intertidal and subtidal). The results show a major impact of the population origin upon the shell form of mussels, which might be a specific morphological adaptation to the harsh intertidal environment. Shell density, conversely, changes with seasonality: denser shells appear in May, which may be an answer to the winter conditions. The results are useful to understand mussel growth, which has in turn many scientific applications.
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Mytilus galloprovincialis, oskola, sasoia, marea-eremuak, Mytilus galloprovincialis, shell dimensions, shell density, tide-levels