Within the habitat preferred by the Constricted Top Shell (Austrocochlea Constricta) some specific micro-habitats are favoured over others. It was clearly identifiable during collection of specimens at WoodyPoint that A. Constricta is usually found inhabiting rock pools in which it can be concealed within the seawater. On other occasions organisms can be found tucked into small rock crevices and ledges where protection and a dwelling for retreat during presence of predators is available. The micro-habitats desired by this species also reduce the impacts caused by the elements. Specifically they reduce the risk of desiccation during a low tide event and the effects of waves and currents during high tide events.
Figure 1: Photograph displaying Austrocochlea Constricta inhabiting a rock ledge
It also became evident that another alternative purpose behind sheltering in these micro-habitats is due to the presence of quality food sources. During collection in May 2014, large quantities of algae were present both under rock ledges and within the crevices (see Figure 1). It gives reason to believe that the presence of a food source is a major factor affecting the micro-habitats in which are occupied. |