Biological Invasions

, Volume 12, Issue 9, pp 2991–2997 | Cite as

Chinook salmon (Oncorhynchus tshawytscha, Walbaum 1792) in the Beagle Channel, Tierra del Fuego: the onset of an invasion

  • Daniel Alfredo Fernández
  • Javier Ciancio
  • Santiago Guillermo Ceballos
  • Carla Riva-Rossi
  • Miguel Alberto Pascual
Invasion Note


In this paper we provide the first report of the presence of exotic Chinook salmon (Oncorhynchus tshawytscha) in two rivers off the Beagle Channel, Lapataia and Ovando, in southern Tierra del Fuego. We also confirm that successful reproduction occurred in the fall of 2007, as we captured yearlings in freshwater. Scale pattern analyses of adult fish caught were all of the “stream” ecotype, with ages ranging between 3 and 5 (average 4.2 year). Stable isotope analysis of Ovando-Lapataia Chinook population indicates general patterns consistent with those of other populations in the region, but characteristically enriched levels of C indicates a distinct ocean feeding location as compared to Atlantic populations in the Santa Cruz River. Two different haplotypes, one identical to the unique haplotype of the Caterina River population, were found in the Ovando-Lapataia rivers, providing partial evidence for some level of contemporary segregation between these two populations. As an exotic species, Chinook salmon have been able to use the ocean as a waterway to rapidly colonize new habitats both in New Zealand and in several Pacific and Atlantic river basins of continental Patagonia. This record expands the known distribution of this species in Patagonia further south and into the Island of Tierra del Fuego. Its presence in the Beagle Channel creates the conditions for its expansion to a significant collection of new rivers, as well as to adjacent marine areas in and around the Southern Fuegian Channels. Our results provide support to the idea that, in practice, no district of Patagonia is sheltered from the colonization by invasive anadromous Salmonids.


Chinook salmon Beagle Channel Patagonia Exotic anadromous salmon 



This work was supported by a specific grant from Argentinean Association of National Parks (APN), and grants from National Council of Scientific and Technological Research (CONICET), Federal Council of Science and Technology (COFECyT) and the National Agency for the Promotion of Science and Technology (FONCyT). We would like to thank Dr. F. Botto and Dr. O. Iribarne for SIA analysis, Park Rangers of the National Park Tierra del Fuego for providing pictures and samples of the specimens and helping with the surveys, Facundo Llompart and Mariela Victorio for helping with the sampling, Carlos Luizón for assistance in the early identification of the species, Rodolfo Iturraspe for providing data and a map of the different river basins and Sheryl Macnie for improving the English of the manuscript.


  1. Becker LA, Pascual MA, Basso NG (2007) Colonization of the Southern Patagonia Ocean by exotic chinook Salmon. Conserv Biol 21:1347–1352CrossRefPubMedGoogle Scholar
  2. Ciancio JE, Pascual MA, Lancelotti J, Riva Rossi C, Botto F (2005) Natural colonization and establishment of a chinook salmon, Oncorhynchus tshawytscha, population in the Santa Cruz River, an Atlantic basin of Patagonia. Environ Biol Fish 74:219–227CrossRefGoogle Scholar
  3. Ciancio JE, Pascual MA, Botto F, Amaya-Santi M, O’Neal S, Riva Rossi C, Iribarne O (2008) Stable isotope profiles of partially migratory salmonid populations in Atlantic rivers of Patagonia. J Fish Biol 72:1708–1719CrossRefGoogle Scholar
  4. Correa C, Gross MR (2008) Chinook salmon invade southern South America. Biol Invasions 10:615–639CrossRefGoogle Scholar
  5. Di Prinzio CY, Pascual MA (2008) The establishment of exotic Chinook salmon (Oncorhynchus tshawytscha) in Pacific rivers of Chubut, Patagonia, Argentina. Ann Limnol 1:61–68Google Scholar
  6. Doucett RR, Booth RK, Power G, McKinley RS (1999) Effects of the spawning migration on the nutritional status of anadromous Atlantic salmon (Salmo salar): insights from stable-isotope analysis. Can J Fish Aquat Sci 56:2172–2180CrossRefGoogle Scholar
  7. Healey MC (1991) Life history of chinook salmon (Oncorhynchus tshawytscha). Pacific salmon life histories, pp 311–394Google Scholar
  8. James GD, Unwin MJ (1996) Diet of chinook salmon (Oncorhynchus tshawytscha) in Canterbury coastal waters, New Zealand. N Z J Mar Fresh Res 30:69–78CrossRefGoogle Scholar
  9. Koo TS, Isarankura A (1967) Objective studies of scales of Columbia River chinook salmon, Oncorhynchus tshawytscha (Walbaum). Fish Bull 66:165–180Google Scholar
  10. Mezga B (2009) Genética de la Invasión del Salmón Chinook (Oncorhyncus tshawytscha) en Patagonia Argentina-Chilena. Dissertation, National University of Patagonia San Juan BoscoGoogle Scholar
  11. Michener RH, Schell DM (1994) Stable isotope ratios as tracers in marine aquatic food webs. In: Lajtha Michener (ed) Stable isotopes in ecology and environmental science. Blackwell, London, pp 138–157Google Scholar
  12. Nielsen JL (1998) Population genetics and the conservation and management of Atlantic salmon (Salmo salar). Can J Fish Aquat Sci 55:145–152CrossRefGoogle Scholar
  13. Pascual MA, Ciancio JE (2007) Introduced anadromous salmonids in Patagonia: risk, uses, and a conservation paradox. In: Bert T (ed) Ecological and genetic implications of aquaculture activities. Kluwer, NorwellGoogle Scholar
  14. Pascual MA, Bentzen P, Riva Rossi C, Mackey G, Kinnison M, Walker R (2001) First documented case of anadromy in a population of introduced rainbow trout in Patagonia, Argentina. Trans Am Fish Soc 130:53–67CrossRefGoogle Scholar
  15. Pascual MA, Macchi P, Urbanski J, Marcos F, Riva Rossi C, Novara M, Dell’Arciprete P (2002) Evaluating potential effects of exotic freshwater fish from incomplete species presence–absence data. Biol Invasions 101:113Google Scholar
  16. Quinn TP, Nielsen JL, Gan C, Unwin MJ, Wilmot R, Guthrie C, Utter FM (1996) Origin and genetic structure of chinook salmon, Oncorhynchus tshawytscha, transplanted from California to New Zealand: allozyme and mtDNA evidence. Fish Bull 94:506–521Google Scholar
  17. Quinn TP, Kinnison MT, Unwin MJ (2001) Evolution of chinook salmon (Oncorhynchus tshawytscha) populations in New Zealand: pattern, rate, and process. Genetica 112:493–513CrossRefPubMedGoogle Scholar
  18. Sambrook J, Russell DW (2001) Molecular cloning: a laboratory manual. Cold Spring Harbor Laboratory Press, New YorkGoogle Scholar
  19. Soto D, Arismendi I, Prinzio CDI and Jara F (2007) Establecimiento del salmón Chinook (Oncorhynchus tshawytscha) en cuencas del Pacífico sur de Sudamérica y sus potenciales implicancias ecosistémicas. Rev Chil Hist Nat 81–98Google Scholar
  20. Unwin MJ, Lucas DH (1993) Scales characteristics of wild and hatchery chinook salmon (Oncorhynchus tshawytscha) in the Rakaia River, New Zealand, and their use in stock identification. Can J Fish Aquat Sci 50:2475–2484CrossRefGoogle Scholar
  21. Van der Zanden MJ, Rasmussen JB (2001) Variation in δ 15N and δ 13C trophic fractionation: implications for aquatic food web studies. Limnol Oceanogr 46:2061–2066CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Daniel Alfredo Fernández
    • 1
  • Javier Ciancio
    • 2
  • Santiago Guillermo Ceballos
    • 1
  • Carla Riva-Rossi
    • 2
  • Miguel Alberto Pascual
    • 2
    • 3
  1. 1.Austral Center of Scientific Research (CADIC-CONICET)UshuaiaArgentina
  2. 2.Centro Nacional Patagónico (CENPAT-CONICET)Puerto MadrynArgentina
  3. 3.Universidad Nacional de la Patagonia SJBSede Puerto MadrynArgentina

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