Jd. Armstrong et al., The application of science to the management of Atlantic salmon (Salmo salar): integration across scales, CAN J FISH, 55, 1998, pp. 303-311
Citations number
54
Categorie Soggetti
Aquatic Sciences
Journal title
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
The need for integration across spatial and temporal scales in applying sci
ence to the management of Atlantic salmon is considered. The factors that a
re currently believed to affect the production of anadromous adult Atlantic
salmon (synthesized from recent reviews) are arranged in a hierarchy in wh
ich any given process overrides those processes at lower levels. There is n
ot a good correlation between levels in the process hierarchy and levels in
hierarchies of scale. This demonstrates the importance of integrating acro
ss scales in identifying the optimum foci for targeting management action.
It is not possible to generalize on the need for integration across scales
within management plans. This is because of the complex ecology of salmon,
the broad range of characteristics of the systems of which they are a part,
and the fact that both local scale and broad scale management can have bro
ad scale effects. Many uncertainties remain regarding the large-scale compo
nents of the ecology of salmon, the way that small-scale mechanisms interac
t with life histories, and the way that different factors interact to limit
production of fish. When more is understood of these processes, it is like
ly that generalized rules might be developed to predict the management requ
irements for stream systems. In the meantime, it is essential that there is
good integration among managers working at different scales and it is impo
rtant that management systems operating at all spatial scales include high-
calibre expertise to compensate for the present paucity of general rules.