Why aren't there more Atlantic salmon (Salmo salar)?

Numbers of wild anadromous Atlantic salmon (Salmo salar) have declined demonstrably throughout their native range. The current status of runs on rivers historically supporting salmon indicate widespread declines and extirpations in Europe and North America primarily in southern portions of the range. Many of these declines or extirpations can be attributed to the construction of mainstem dams, pollution (including acid rain), and total dewatering of streams. Purported effects on declines during the 1960s through the 1990s include overfishing, and more recently, changing ocean conditions, and intensive aquaculture. Most factors affecting salmon numbers do not act singly, but rather in concert, which masks the relative contribution of each factor. Salmon researchers and managers should not look for a single culprit in declining numbers of salmon, but rather, seek solutions through rigorous data gathering and testing of multiple effects integrated across space and time.

[1]  R. Stephenson.  Stock complexity in fisheries management: a perspective of emerging issues related to population sub-units , 1999 .

[2]  R. Naiman,et al.  Proactive responses to human impacts that balance development and Atlantic salmon (Salmo salar) conservation: an integrative model , 1998 .

[3]  M. Mather.  The role of context-specific predation in understanding patterns exhibited by anadromous salmon , 1998 .

[4]  K. Fausch.  Interspecific competition and juvenile Atlantic salmon (Salmo salar): on testing effects and evaluating the evidence across scales , 1998 .

[5]  E. Verspoor,et al.  Interactions between wild and introduced Atlantic salmon (Salmo salar) , 1998 .

[6]  A. Huryn,et al.  Multi-scale determinants of secondary production in Atlantic salmon (Salmo salar) streams , 1998 .

[7]  K. Fausch,et al.  The application of science to the management of Atlantic salmon (Salmo salar): integration across scales , 1998 .

[8]  P. D. Harris,et al.  Diseases and parasites in wild Atlantic salmon (Salmo salar) populations , 1998 .

[9]  K. Friedland.  Ocean climate influences on critical Atlantic salmon (Salmo salar) life history events , 1998 .

[10]  Steven P. Roy,et al.  Elements in the development of conservation plans for Atlantic salmon (Salmo salar) , 1998 .

[11]  T. Quinn,et al.  The marine phase of the Atlantic salmon (Salmo salar) life cycle, with comparisons to Pacific salmon , 1998 .

[12]  R. Saunders.  Ecology and Management of Atlantic Salmon , 1991 .

[13]  L. Hansen,et al.  Estimates of the annual loss of Atlantic salmon, Salmo salar L., in Norway due to acidification , 1991 .

[14]  C. G. Leaniz,et al.  The Atlantic Salmon in the Rivers of Spain with Particular Reference to Cantabria , 1988 .

[15]  G. L. Lacroix,et al.  Responses of Juvenile Atlantic Salmon (Salmo salar) to Episodic Increases in Acidity of Nova Scotia Rivers , 1987 .

[16]  M. Stansby.  CHAPTER 19 – FATTY ACIDS IN FISH , 1986 .

[17]  R. W. Dunfield.  The Atlantic salmon in the history of North America , 1985 .

[18]  B. Kynard,et al.  Fish Passage Facilities and Anadromous Fish Restoration in the Connecticut River Basin , 1982 .

[19]  H. Maccrimmon,et al.  World Distribution of Atlantic Salmon, Salmo solar , 1979 .

[20]  A. Netboy.  The Atlantic Salmon: A Vanishing Species? , 1968 .

[21]  P. F. Elson.  Effects on Wild Young Salmon of Spraying DDT over New Brunswick Forests , 1967 .