Abstract
Effects of differing salinities on morphological characters have been found in marine and brackish populations of Tisbe holothuriae. The results suggested an active role of salinity as a factor promoting divergence. In order to test if the observed differentiation could be due to the level of heterozygosity, a study was performed in strains with low and high homozygosity. Six quantitative traits, and their respective fluctuating asymmetry, have been measured in outbred (coefficient of consanguineity, F = 0) and inbred (F = 0.5) strains, raised at three salinities; 20, 25 and 35‰. The analysis of variance was applied to test if the morphological measures were the same, and if the variations induced by decreased salinity had the same trend, in the two strains. Wilcoxon test was applied to the asymmetry, when it was not possible to render the variances homogeneous. The results showed that the measures and the effects of salinity on morphometry differed in the strains with low and high homozygosity. No effect of salinity on asymmetry was found. Length measures showed higher asymmetry in the most homozygous strain.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Battaglia, B., 1970. Cultivation of marine copepods for genetic and evolutionary research. Helgolander wiss. Meeresunters. 20: 385–392.
Battaglia, B and G. D’Avella, 1964. Differenziamento di caratteri geno-geografici nel copepode Tuie furcaia (Baird). La tolleranza alle variazioni di salinità. Boll. Zool. 31: 1233–1241.
Battaglia, B. and G. Fava, 1982. Genetic adaptation to brackish water environments. Oceanol. Acta.N. SP. Actes Symp. Int. lagunes cotieres. 221–224.
Clarke, G. M., G. W. Brand and M. J. Whitten, 1986. Fluctuating asymmetry: a technique for measuring developmental stress caused by inbreeding. Aust. J. biol. Sci. 39 145–153.
Gaudy, R., J. P. Guerin and M. Moraitou-Apoitolopoulou, 1982. Effect of temperature and salinity on the population dynamics of Tisbe holothuriae Humes (Copepoda: Harpacticoida) fed on two different diets. J. exp. Mar. Biol. Ecol. 57: 257–271.
Kinne, O., 1971. Salinity, Animals, Invertebrates. In O. Kinne (ed.), Marine Ecology, Vol. I, part 2. J. Wiley and Sons. NY: 821–995.
Lerner, I. M., 1954. Genetic homeostasis. Oliver and Boyd, London, 134 pp.
Martini, F. and G. Fava, (In press). Effetti della diluizione e della consanguineità nel copepodc Tbbe holoihuriar (Humes). Nuova Thalassia.
Soulé, M., 1967. Phenetics of natural populations. II. Asymmetry and evolution in a lizard. Am. Nat. 101: 141–160.
Van Valen., L., 1962. A study of fluctuating asymmetry. Evolution 16: 125–142.
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1988 Kluwer Academic Publishers
About this paper
Cite this paper
Fava, G., Martini, E. (1988). Effect of inbreeding and salinity on quantitative characters and asymmetry of Tisbe holothuriae (Humes). In: Boxshall, G.A., Schminke, H.K. (eds) Biology of Copepods. Developments in Hydrobiology, vol 47. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3103-9_52
Download citation
DOI: https://doi.org/10.1007/978-94-009-3103-9_52
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-7895-5
Online ISBN: 978-94-009-3103-9
eBook Packages: Springer Book Archive