| variation of the locomotor activity rhythms in three species of talitrid amphipods, talitrus saltator, orchestia montagui, and o. gammarellus, from various habitats. | the expression of biological rhythms was investigated in five populations of three different species of talitrid amphipods from various habitats in the maremma regional park, grosseto, italy: talitrus saltator (from a sandy beach and a canal), orchestia montagui (form a posidonia banquette), and o. gammarellus (from a cave entrance and a river bank). locomotor activity rhythms were recorded in individual animals over 21 days in constant dark at a temperature of 18 degrees +/-1 degrees c. a high ... | 2008 | 18622813 |