ISSN:
1573-5117
Keywords:
Hexarthra bulgarica
;
diurnal vertical movement
;
horizontal distribution
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract A detailed 24 hour sampling program has been carried out at 26 depths of 6 stations located along the two main transects of lake La Caldera. The resultant data has allowed us to define for H. bulgarica a general daily trend of movement which couples a typical nocturnal vertical migration with an ‘horizontal’ one that is particularly conspicuous at dawn and dusk when the population seemed to moved toward or away from the shore, respectively. These results confirm our previous data and suggest that light is responsible for these complex movements.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00048901
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