Theba pisana is a polymorphic land snail widely used in ecophysiological research on the biological significance of solar irradiation. We investigated whether, taking size into account, differently pigmented morphs of a Mediterranean population of T. pisana influence the snails’ heating under different wavelengths. We used a laboratory set-up comprising light-emitting diodes emitting visible light of defined wavelengths and quantified shell heating using high-resolution thermography. Shell pigmentation was quantified densitometrically. There were significant effects of both shell size and light wavelength, such that small snails heated more than large ones over 15 min, and blue light (470 nm) raised temperature more than green light (525 nm). Pigmentation alone did not show significance, but a trend towards higher temperature with increasing pigmentation was evident. Despite the observed significances and trends, we could only explain at most 4.67% of variation in shell heating by multiple regression modelling. However, the light intensity used in this experiment was low and the pigmentation intensity of the shells varied, at most, by a factor of 2. This suggests the actual temperature of a snail depends not only on the tested variables, but also on the multifactorial action of a number of unknown, perhaps intrinsic physiological parameters.

中文翻译：

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环境波长，壳大小和色素沉着强度在地中海Theba pisana（Eupulmonata：Helicidae）加热中的作用

Theba pisana是一种多态蜗牛，广泛用于研究太阳辐射的生物学意义的生态生理学。我们调查了是否考虑到大小，地中海种群的Pisana色泽不同影响蜗牛在不同波长下的加热。我们使用了包括发光二极管在内的实验室装置，这些发光二极管发出定义波长的可见光，并使用高分辨率热像仪对外壳进行了定量加热。壳色素沉着通过光密度法定量。壳的大小和光的波长都有显着影响，例如，小蜗牛在15分钟内加热得比大蜗牛要多，蓝光（470 nm）的温度要高于绿光（525 nm）。单独的色素沉着没有显着意义，但是随着色素沉着的增加，温度升高的趋势是明显的。尽管观察到了显着的意义和趋势，但通过多重回归建模，我们最多只能解释壳加热变化的4.67％。然而，