Impacts of exotic salmonids. |
My main research interests are centered on two central topics of anadromous salmon research in Patagonia: evaluating their effects on receiving communities and identifying environmental conditions that facilitate their dispersion and control the establishment of new populations.
During my undergraduate thesis I investigated the effects of prey quality and abundance on fish growth by exploring the role of the Anomuran crabs of the genus Aegla on the diet and growth on populations of resident rainbow, brook, and brown trout, the most conspicuous salmonid species in Patagonia.
As part of my ongoing PhD. I am studying the potential impact of anadromous salmon populations on Southern Atlantic and Pacific Oceans communities. Using NOAA sea surface temperature images, thermal preferences of salmon at sea, records of incidental captures, and salmonid marine residence patterns I am building maps of potential at-sea distribution for salmonids, their predator and preys in Patagonian ocean communities. I am using stable isotopes analysis to identify the origin of individuals (marine vs. freshwater) and to infer diet and trophic overlap with other marine taxa. Finally I am integrating this information with bioenergetic and population modeling to estimate salmonid marine consumption and to compare it with that of potential competitor species.
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 Pascual, M.A., and J.E. Ciancio. 2007. Introduced anadromous salmonids in Patagonia: risks, uses, and a conservation paradox. Pp. 333 – 354, In: T.M. Bert (ed.), Ecological and Genetic Implications of Aquaculture Activities. Springer, New York City, New York, USA. Chapter 18.
Ciancio, J.E. , M. A. Pascual, J. Lancelotti, C. M. Riva Rossi y F. Botto. 2005. Natural Colonization and Establishment of a Chinook Salmon (Oncorhynchus tshawytscha) Population in the Santa Cruz River, an Atlantic Basin of Patagonia. Environmental Biology of Fishes 74: 217-225.
Ciancio, J.E. y M.A. Pascual. 2006. Energy density of freshwater
Patagonian organisms. Ecología Austral 16: 91 - 94.
Ciancio, J.E., M. A. Pascual, and D. Beauchamp.2007. Energy density of Patagonian aquatic organisms and empirical predictions based on water content. Transactions of the American Fisheries Society. 136 (5) 1415–1422 DOI: 10.1577/T06-173.1.
Ciancio, J.E., Pascual, M., Botto, F., Frere, E. and O. Iribarne. 2008. Trophic relationships of exotic anadromous salmonids in the Southern Patagonian Shelf as inferred from stable isotopes. Limnology and Oceanography 53(2): 788-798. (Featured article of the issue).
Ciancio, J.E., M. Pascual, M., Botto M. Amaya, S. O´Neal, C. Riva Rossi and O. Iribarne.2008. Stable isotope profiles of partially migratory salmonid populations in Atlantic rivers of Patagonia Journal of Fish Biology 72: 1-12.
Pascual, M.A., J. Lancelotti, B.Ernst-Elizalde, J.E. Ciancio, E. Aedo-Marchant, and M. Garcia-Asorey. The importance of scale, connectivity, and incentives in conservation programs: the case of exotic Salmonids of Patagonia. In press. Frontiers in Ecology and Environment.
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