Population Biology in the Northeast
We investigate and document the biology and ecology of fish in the western North Atlantic Ocean.
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We focus on marine fish vital rates and their natural history, studying topics such as:
- Growth
- Mortality
- Reproduction
- Predator-prey relationships
- Geographic distributions
- Movements.
Age and Growth
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The age of many fish can be determined by counting the annual rings on their ear stones, much like counting tree rings. Knowing the age structure of a fish population helps us monitor, assess, and manage stocks for long-term benefits.
Learn more about our age and growth research
Environmental DNA
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Environmental DNA is the genetic material shed by organisms while in the water column. It leaves a forensic mark of their presence across the ocean. The water samples we collect include mucus, feces, or tissue particles shed by sealife. Scientists can extract DNA from these materials and match it to references to identify what species swam where. This approach can also reveal predators and prey by extracting DNA from the feces or the stomachs of marine animals. This technology is potentially a game-changer for people studying ecosystems and habitat, and for conducting stock assessments.
Learn more about our eDNA research
Food Habits
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By studying the food habits of fish and invertebrates, we can quantify how many fish are removed from the ocean by predation as opposed to harvesting. We can then assess the ecosystem impacts of that removal.
Learn more about food web dynamics on the Northeast continental shelf
Reproduction and Condition
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Fish follow many different strategies to reproduce. Understanding this natural reproduction by wild fish is the key to managing them sustainably. The onset of reproduction and numbers of eggs produced can vary between locations and years. This variable reproductive output may be related to the quality of their food. Understanding these dynamics can lead to better stock and ecosystem assessments and management.
Sharks
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Sharks are at the top of the marine food chain, eating fish, turtles, birds, and marine mammals. That is why they are called “apex predators.” We conduct shark life history research and long-term monitoring essential for stock assessment and management.
Learn more about our shark research