2006
DOI: 10.4067/s0716-078x2006000100009
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Abstract: In order to evaluate the present distribution patterns of salmonids and their potential effects on native fish, we sampled 11 large lakes and 105 streams, encompassing a total of 13 main hydrographic watersheds of southern Chile (39 o to 52 o S). Overall, trout (Salmo trutta and Oncorhynchus mykiss) accounted for more than 60 % of total fish abundance and more than 80 % of total biomass, while 40 % of the streams sampled did not have native fish. Salmon, introduced for aquaculture, such as O. kisutch, Salmo sa… Show more

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Cited by 136 publications
(180 citation statements)
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“…This evidences that, although the fish sampling technique might have underestimated the abundance of H. macraei (see Material and methods), its distribution pattern was well reflected by the sampling protocol. A pattern of fish abundance and distribution similar to the one observed here was reported by Soto et al (2006) for Chilean Patagonian streams, evidencing the successful expansion of the salmonids in Patagonia. Moyle and Light (1996) reported that the hydrological regime in California streams and estuaries is one of the most important variables explaining fish assemblages.…”
Section: Discussionsupporting
confidence: 65%
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“…This evidences that, although the fish sampling technique might have underestimated the abundance of H. macraei (see Material and methods), its distribution pattern was well reflected by the sampling protocol. A pattern of fish abundance and distribution similar to the one observed here was reported by Soto et al (2006) for Chilean Patagonian streams, evidencing the successful expansion of the salmonids in Patagonia. Moyle and Light (1996) reported that the hydrological regime in California streams and estuaries is one of the most important variables explaining fish assemblages.…”
Section: Discussionsupporting
confidence: 65%
“…However, native fish were absent from Andean sites where introduced species were present and abundant. This scenario resembles the one reported by Soto et al (2006), suggesting that the same processes related to the interaction between native and introduced species might be operating at both sides of the Andes. However, sampling sites located in the ecotone region were affected by two of the less adverse land uses for native fish populations (pasture and native forest), whereas most of the Andean sites were associated to more disturbing land uses (urban settlements and exotic forest).…”
Section: Discussionsupporting
confidence: 52%
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“…Some 40% of the streams sampled did not have native fish. Native fish (chiefly galaxiids and atherinids) were more abundant in lakes than in streams but the highest native fish biodiversity occurred in streams of the central valley (Soto et al, 2006). Streams with higher conductivity, larger pool areas, more fine sediments, and low brown trout densities -usually catchments with higher anthropogenic disturbance -were more suitable as refuges for native fish.…”
Section: Impacts Of Exotic Fish Introductions On Ics and Nicsmentioning
confidence: 92%
“…Similarly, in southern South America, introduced trout are now the dominant predator in many streams. Soto et al (2006) looked at the present distribution of introduced salmonids in large lakes and streams of southern Chile, and their potential effects on native fish faunas. Overall, introduced brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss accounted for more than 60% of total fish abundance and more than 80% of total biomass.…”
Section: Impacts Of Exotic Fish Introductions On Ics and Nicsmentioning
confidence: 99%