MAINSTREET NS | Jan 6th, 2015
Boris Worm tells Stephanie about the influence melting Artic sea ice may be having on changing weather patterns in the Northern Hemisphere.
Interactions between the Galapagos Marine Reserve and Tuna Fisheries in the Eastern Tropical Pacific
Interactions between the Galapagos Marine Reserve and Tuna Fisheries in the Eastern Tropical Pacific Marine protected areas (MPAs) are recognized as a powerful tool for both conservation and fisheries management. It is well established that marine ecosystems benefit from protected areas in terms of higher density, biomass, and species richness of adult and juvenile fishes… Details
Evaluating the feasibility of switching to catch-and-release shark derbies in Nova Scotia: fisher and public opinions, legislation, and policy
Evaluating the feasibility of switching to catch-and-release shark derbies in Nova Scotia: fisher and public opinions, legislation, and policy Many derbies around the world use catch-and-release rather than catch-and-kill as a method for game fishing. Given that sharks are an important part of the marine ecosystem and their populations are declining worldwide, effective conservation and… Details
Trends of shark catch rates in the Southern Atlantic
Trends of shark catch rates in the Southern Atlantic My Ph.D. research with Dr. Rosangela Lessa (UFRPE) and Dr. Boris Worm (Dalhousie University) focuses on life history patterns and vulnerability of pelagic sharks exploited by longline fisheries in South America. Rodrigo is also collaborating with the Shark Baselines Project (Dr. Francesco Ferretti, Stanford University, Lenfest… Details
Declining productivity of cod stocks
Productivity is a central determinant of population dynamics with consequences for population viability, resilience to exploitation, and extinction. In fish, the strength of a cohort is typically established during early life stages. Traditional approaches to measuring productivity do not allow for interannual variation in the maximum reproductive rate, a parameter governing population productivity. Allowing such process variation provides the ability to track dynamic changes instead of assuming a static productivity regime. Here we develop and evaluate a multivariate stock–recruitment state-space model to simultaneously estimate time-varying stock productivity and synchronicity of dynamics across populations.
DetailsMAINSTREET NS | May 27, 2014 | 8:24
Boris talks about the things modern day beachcombers are finding, and what can be done to stem the endless tide of garbage.
Long-term trends in ocean chlorophyll
Marine phytoplankton account for approximately half of the production of organic matter on earth, support virtually all marine ecosystems, constrain fisheries yields, and influence climate and weather. Despite this importance, long-term trajectories of phytoplankton abundance or biomass are difficult to estimate, and the extent of changes is unresolved. Here, we use a new, publicly-available database of historical shipboard oceanographic measurements to estimate long-term changes in chlorophyll concentration from 1890 to 2010.
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Effects of sea surface warming on marine plankton
Ocean warming has been implicated in the observed decline of oceanic phytoplankton biomass. Some studies suggest a physical pathway of warming via stratification and nutrient flux, and others a biological effect on plankton metabolic rates; yet the relative strength and possible interaction of these mechanisms remains unknown. Here, we implement projections from a global circulation model in a mesocosm experiment to examine both mechanisms in a multi-trophic plankton community.
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NSERC Presents 2 Minutes with Boris Worm
Dalhousie University’s Boris Worm combines oceanography and marine biology to paint a more complete picture of what’s happening under the waves. Comprehensive information about the state of the oceans leads to better fisheries management, which benefits the environment, the economy and society as a whole.
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NSERC – Ecosystem oceanography
Core support for our research program ‘Ecosystem oceanography: understanding the dynamics of a changing ocean’ comes from the National Science and Engineering Research Council of Canada. The goal of this program is to analyze the causes and consequences of recent changes in marine food webs. Specifically, our lab will attempt to analyze the potentially complex interdependencies of observed changes in predator and plankton abundance throughout the world’s oceans.