Project

Clues from the past to guide the future

Species
  • Sharks
Years funded
  • 2022
Status
  • Active
Project types
  • Conservation
  • Research
Affiliation
  • School of Archaeology and Ancient History University of Leicester
Description

Eric is casting back in time to understand how processes throughout history have shaped shark ecology today. Based in Monterey Bay, where declines in the 21 different local shark species have been attributed to overfishing and environmental change, he is using archaeological sites to understand thousands of years of shark history. Using ancient DNA to confirm species identification for shark remains, and combining this with cutting-edge biogeochemistry, Eric aims to look at how overfishing and habitat change have impacted shark behaviour over a much greater timescale than ever before. His hope is that his results will add nuance to how shark conservation is approached.

Clues from the past to guide the future

Eric Guiry

Project leader
About the project leader

I grew up in the Great Lakes region of Canada and spent my childhood exploring the Lake Ontario watershed. On visits with family in the USA I would catch fish along Florida beaches. During this time I had the privilege of observing a wide range of marine and freshwater life: reptiles, amphibians, crustaceans and fish. These experiences came to underpin my lifelong interest in understanding how human and animal communities interact. Throughout my graduate studies – including two BScs, an MA, and a PhD focusing on natural science and archaeology – I had further opportunities to live near and study...

PROJECT LOCATION : California
Project details

Towards an archaeology of sharks: building millennial-scale records of shark ecology in Monterey Bay

Key objective

To demonstrate the immense potential of archaeological shark remains as bio-molecular archives for exploring long-term trends in shark ecology.

Why is this important

Humans have been exploiting sharks for millennia. However, because scientific monitoring has developed only recently, conservation decisions about how to protect sharks are often made with limited knowledge of how populations have responded to past and ongoing human impacts, like overfishing and habitat destruction. To better contextualise key conservation challenges, such as knowing which human impacts are most harmful to shark populations, this project taps into the potential of archaeological assemblages for generating long-term baseline perspectives.

Background

Monterey Bay, on California’s Central Coast, supports more than 500 fish species, including 21 shark taxa. Although many of the bay’s sharks were once abundant, a growing number of species have seen reductions in their populations as a result of overfishing and the deterioration of their environment. Several research programmes are exploring contemporary shark ecology in the area, but they lack the time depth necessary to understand the long-term impacts of the historical processes that have shaped (and continue to shape) modern shark ecology in the region.
Shark remains recovered from archaeological sites around Monterey Bay provide unprecedented opportunities to explore the relationships between sharks, humans and the environment over hundreds or even thousands years. This promising avenue of research is almost entirely unexplored, however, due to difficulties in assigning species identifications to archaeological shark remains, which prevents more detailed analyses. Our project will overcome this challenge by using analyses of ancient DNA to confirm species identification for the shark remains. Combining species identifications with cutting-edge biogeochemical techniques will enable us to investigate long-term patterns in shark behaviour and explore the effects of long-term processes (like overfishing and habitat change) on Monterey Bay’s shark ecology for the first time. Insights from this work will provide key contextual information for developing more nuanced shark conservation approaches.

Aims & objectives
  • To use archaeological science techniques to reconstruct how fisheries have impacted shark populations over millennia. This information can be critical for improving how we approach shark conservation challenges.