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dc.contributor.convenorDavid Rogers and Elizabeth Watsonen_AU
dc.contributor.authorFurse, Jamesen_US
dc.contributor.authorWild, Clydeen_US
dc.contributor.authorSirotti, Simonen_US
dc.contributor.authorPethybridge, Heidien_US
dc.contributor.editorDavid Rogersen_US
dc.description.abstractFreshwater crayfish are regarded as principally nocturnal, however Euastacus sulcatus is commonly observed during daylight hours, both in-stream, and wandering overland, suggesting that this species is diurnal. During the winter-summer of 2002/2003 we investigated the activity patterns of E. sulcatus using a series of continuous 24 hour observation sessions. The results of this study indicate that this species is active in all seasons, except for large crayfish (>40 mm OCL), which are rarely observed in spring and winter, but are common in summer. We conclude that E. sulcatus is a diurnal species, and that peak activity generally occurs around midday in all seasons, except in the case of small crayfish (<25 mm OCL), which become nocturnal in summer when the time of their peak activity changes from around midday, to around midnight. We suggest that this general pattern of diurnal activity may be a predator-avoidance strategy, as many carnivorous Australian mammals are nocturnal. The nocturnal activity patterns seen in small crayfish during summer may also be a predator-avoidance strategy, but the diurnal predators in this case could be the large crayfish, which are active only in the summer.en_US
dc.publisherInternational Association of Astacologyen_US
dc.relation.ispartofconferencename15th Symposium of the International Association of Astacologyen_US
dc.relation.ispartofconferencetitle15th Symposium of the International Association of Astacologyen_US
dc.titleThe daily activity patterns of Euastacus sulcatus in southeast Queenslanden_US
dc.typeConference outputen_US
dc.type.descriptionE1 - Conference Publications (HERDC)en_US
dc.type.codeE - Conference Publicationsen_US
gro.hasfulltextNo Full Text

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    Contains papers delivered by Griffith authors at national and international conferences.

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