The Trail, 1964-11-19

https://soundideas.pugetsound.edu/thetrail_all/1900/thumbnail.jp

Terrestrial emigration behaviour of two invasive crayfish species

To disperse between isolated waterbodies, freshwater organisms must often cross terrestrial barriers and many freshwater animals that are incapable of flight must rely on transport via flooding events, other animals or anthropogenic activity. Decapods such as crayfish, on the other hand, can disperse to nearby waterbodies by walking on land, a behaviour that has facilitated the spread of invasive species. Overland movement could play a key role in the management of non-native crayfish, though to what extent terrestrial emigration occurs in different species is poorly understood. Here, we directly compared the terrestrial emigration tendency of two non-native crayfish species in Great Britain; red swamp (Procambarus clarkii) and signal (Pacifastacus leniusculus) crayfish. We found that both species emigrated from the water and that there was no significant difference in terms of their terrestrial emigration tendency, suggesting that there is a risk both of these species will migrate overland and disperse to new habitats. This study shows that terrestrial emigration is an important behavioural trait to consider when preventing the escape of crayfish from aquaculture and further spread of invasive species

Gallipoli

Mode of access: Internet

The Coming of Christ

The Invitation and the Programme were scanned from originals, both held in the University Archives.This play was a production of the Theatre Guild. It was staged in the University Little Theatre

La fiebre del mar

I must go down to the seas again, to the lonely sea and the sky,/ And all I ask is a tall ship and a star to steer her by,/ And the wheel's kick and the wind's song and the white sail's shaking,/ And a grey mist on the sea's face, and a grey dawn breaking.// I must go down to the seas again, for the call of the running tide/ Is a wild call and a clear call that may not be denied;/ And all I ask is a windy day with the white clouds flying,/ And the flung spray and the blown spume, and the sea-gulls crying.// I must go down to the seas again, to the vagrant gypsy life,/ To the gull's way and the whale's way, where the wind's like a whetted knife;/ And all I ask is a merry yarn from a laughing fellow-rover,/ And quiet sleep and a sweet dream when the long trick's over

ODTAA

416 hal;19,5 c

Jim Davis

192 p.; 18 cm