| moon orientation in adult and young sandhoppers under artificial light. | our experiments, carried out at night and during the day on adults and laboratory-born young of the sandhopper talitrus saltator, deal with the identification and use of the moon as an orientating factor. sandhoppers were released in an apparatus (a plexiglas dome) that produced a scenario similar to the natural one (with artificial sky, moon or sun illuminated at different intensities). when tested at night, the adult and young sandhoppers used the artificial moon like the natural one, independ ... | 2005 | 16188607 |
| the amphipod talitrus saltator as a bioindicator of human trampling on sandy beaches. | the present paper assesses the use of the supralittoral amphipod talitrus saltator as a bioindicator of the effects of human trampling on the supralittoral sandy band. samplings in delimited areas were carried out at sites subjected to different human impact. the results showed a strong negative correlation between the number of swimmers and the sandhopper population density, while there was no clear relationship between sandhopper abundance and the other factors considered: granulometry, compac ... | 2008 | 18281086 |
| 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 |
| identification and temporal expression of putative circadian clock transcripts in the amphipod crustacean talitrus saltator. | talitrus saltator is an amphipod crustacean that inhabits the supralittoral zone on sandy beaches in the northeast atlantic and mediterranean. t. saltator exhibits endogenous locomotor activity rhythms and time-compensated sun and moon orientation, both of which necessitate at least one chronometric mechanism. whilst their behaviour is well studied, currently there are no descriptions of the underlying molecular components of a biological clock in this animal, and very few in other crustacean sp ... | 2016 | 27761341 |
| substrate dependent talitrid amphipods from fragmented beaches on the north coast of crete (crustacea, amphipoda, talitridae), including a redefinition of the genus orchestia and descriptions of orchestia xylino sp. nov. and cryptorchestia gen. nov. | four species of talitrid amphipods (orchestia montagui audouin, 1826, orchestia stephenseni cecchini, 1928, orchestia xylino sp. nov. and talitrus saltator (montagu, 1808)) are reported from a set of fragmented pocket beaches to the east of heraklion on the north coast of crete. aside from a previous record of o. stephenseni these are the first records of talitrid amphipods from the island of crete. 2) along a coastal segment of only 4.36 km, characterised by habitat fragmentation and substrate ... | 2013 | 26240906 |