ISSN:
1573-143X
Keywords:
behaviour
;
cultivation
;
emersion
;
great scallop
;
Pecten maximus
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Scallop spat produced for continued culture normally requiretransportation between sites, and the associated stresses may causemortalities. In the present experiment, scallops of 40–55 mm shell heightwere emersed in air for time intervals up to 24 h and their behaviourexamined once re-immersed. Scallops were placed upside-down and thenumber of movements and the cumulative numbers righting in 5 min timeblocks were recorded. The greatest frequency for all behaviouralresponses was found at 15–17 °C in August. Responses were reducedin November and June (9–11 °C) and least at 5 °C in January.All effects of treatment, temperatures and season, and increases in airexposure were significantly different. Following the treatments, mortalitiesafter 10 days in culture was about 10–30% for scallops emersed for 18 and24 h in August and June. Scallops did not show significantly differentbehaviour whether they were emersed upright or inverted. However,scallops emersed at 15 °C had fewer responses than scallops held at 〈10 °C, so chilling during transport may prolong scallop vitality. Theresults suggest that air exposure 〉12 h should be avoided. At temperatures〉9 °C, behavioural responses may be a simple and effective method toassess vitality which can assist in the management of scallop culture.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009246530438
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