Martin Hall (PhD, 1983)
After graduating in Marine Biology from the University of Buenos Aires, I went to Patagonia to conduct research. My main interests were the management of the natural resources of the area, and I became involved in several projects. I realized that my training was not the right one to produce solid scientific answers to the questions of how much could be harvested sustainably and other issues relevant to most developing countries.
Ximing Guo (MS, 1987; PhD, 1991)
I began graduate school at the School of Fisheries in 1985, after receiving a BS degree from Shandong College of Oceanography (now Ocean University of China). My decision to join UW was influenced by Lauren “Doc” Donaldson, whom I had the fortune to meet in Qingdao. Donaldson, a legendary fish geneticist who developed the famous “Donaldson Trout,” introduced UW to me and encouraged me to come.
I came to the PhD program at the School of Aquatic and Fishery Science from Rome, Italy, my birthplace. After a handful of years teaching on schooners with the Sea Education Association, and starting to learn the tricks of the trade as a visiting scientist with the Fisheries Department of the Food and Agriculture Organization of the United Nations, I decided it was time to get some good grounding in fishery science.Read more
The deadly fungal disease Bd (Batrachochytrium dendrobatidis) is a major cause of the wave of recent extinctions of frogs and toads, but it is difficult to decide how to best save amphibian populations from its ravages. Now a new framework has been developed that helps managers decide which actions are the most beneficial. A combination of a model of multiple boreal toad breeding sites, and expert judgment, was used to assess 35 possible actions that either preserve habitat, reduce Bd prevalence, or reintroduce boreal toads to areas where they no longer exist.Read more
My years at the University of Washington are among the best in my life; I was not the best student, but I must have been the happiest! I joined the MS program with a Chilean government scholarship, poised to obtain expertise in stock assessment and to go back to my job at the Undersecretary of Fisheries. But life took me in different directions.Read more
Fisheries stock assessments commonly ignore space when assessing the status of small pelagic fish species like herring, anchovy, and sardines, because including multiple areas adds a large of number of parameters to the models. Results from a new simulation framework based on herring in Haida Gwaii, British Columbia, now suggest that stock assessment estimates of spawning fish is improved when the models matched the true underlying changes in fish across areas, and therefore that future stock assessments should always include spatial structure when the fish population can be assigned to subpopulations.Read more
To detect floods and protect fish and other stream critters, warning systems are needed that track river flow. But while these stream gage monitoring systems have been restored to historical levels in the U.S., they are declining globally. A new study highlights trends in stream gage numbers, and pinpoints areas in the U.S. that need additional monitoring because of a combination of floods, droughts, and risk to biodiversity.Read more
Forage fish are small and densely schooling fish like herring and sardines, that hang out in the open water and become the perfect food for predatory fish, marine mammals, and birds. One key feature of their population numbers is that they have dramatic boom and bust cycles because of ocean conditions, fishing, and highly variable recruitment (numbers of baby fish produced each year).Read more
Catch limits are set for fisheries in the U.S. based on formal fisheries stock assessments: complex models that seek to explain all the available data and make forecasts, similar to the methods used for weather forecasts. However, because there is a shortage of both data and trained scientists, not all fisheries can be assessed every year. A new study finds that assessments are conducted on 59% of fisheries within fisheries management plans, but only 13% of fisheries outside management plans.Read more
Zooplankton, the living tiny animals in water, are an important component of freshwater food webs, sustaining many freshwater fisheries. It has long been thought that a substantial portion of zooplankton diets come originally from land-based ecosystems, for example from nutrients leaching out of plant matter falling into the water, rather than being based entirely from freshwater sources. Now, a bias has been demonstrated in a key hydrogen-based method used to estimate the land portion of zooplankton diets.Read more