Welcome, I am a stock assessment scientist with 35-year experience  (RESEARCH GATE). I have been working on stock assessment and management of demersal and pelagic fisheries off Chile and Falkland Islands - Islas Malvinas.  I am a Marine Biologist, a Master of Arts in Applied Statistics, a Master of Science in Fisheries, and a Marine Sciences doctor candidate.   I have worked on fish biology, squid biology, and ecology as well.   

From 1989 to 2005 I worked at the Fishery Development Institute (IFOP), which is the Chilean Fisheries Research Institute.

From 2006 to 2009 I worked as a senior stock assessment scientist for the Falkland Islands Fisheries Department (FIFD). During those years I conducted 8 area swept surveys to estimate squid abundance using geo-statistic methods with maximum likelihood estimations. I also did toothfish and grenadier stock assessments.  Furthermore, I participated in fishery management calculating the vessel units and the length of fishing seasons for squid (Loligo) fishing seasons.  

I returned to work at the Fisheries Development Institute (IFOP) in February 2010 and since then I have been working on hoki, hakes, orange roughy, jumbo squid, anchovy and jack mackerel.

I have worked  on the stock assessment of Hakes, Hoki, Southern Blue Whiting, Orange Roughy, kingklip, Patagonian squid, Toothfish, Grenadier, Jack Mackerel, Humboldt squid and Anchovy. I developed a specific statistical model which could be structured by size or age. I write by own codes for different models using languages as Fortran, Visual Basic, MATLAB and ADmodel Builder, TMB. For estimating Total Allowable Catch (TAC) I use models to simulate different harvesting strategies (Constant catch, constant exploitation rate with escape, etc.), and evaluate their performances estimating stock depletion risks.  I also estimate TAC based on risk analysis that TAC surpass biological reference points (F%SB).  I make uncertainty and risk analysis based on Bayesian analysis and also using frequentistic approach.

In the case of Hoki, TAC allocation between trawl bottom and purse-seine fleets is a main concern and I analyzed the effects of different allocation on the stock depletion.

Southern Blue whiting is a highly migratory resource which enters in Chilean waters to spawn and then returns to Atlantic waters, the spawning aggregation lasts one month and generates large changes in catchability. Therefore, a specific model has been developed with Dr. Nelson Ehrhardt from University of Miami.

Environmental variability is strong in our ecosystems, so I found an optimal environmental window for hake recruitment and turbulence and good correlation with El Niño events and the strength of cohort. We also found an apparent ecosystem regime shift in the same years (1977 and 1988) than in the north Hemisphere, suggesting important decadal changes.

Therefore, my main interest is modeling resource dynamics and their relationship with the environment and their implications for management.