This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
Jacob Krause, Ph.D.
As our access to aquatic resources become increasingly complex, my research aims to provide managers with the knowledge to make wise and informed decisions. My investigations are focused on understanding fish population dynamics through field observations and robust mathematical modeling.
I work at the Klamath Falls Field Station as a Research Fish Biologist. My current work focuses on the challenges of recovering the endangered Lost River and shortnose suckers in the Upper Klamath River Basin, through monitoring their population dynamics and investigating potential barriers to recruitment. My postdoctoral studies included analyzing the effects of hypoxia on the shrimp fishery of the Gulf of Mexico, and using telemetry to estimate mortality within the cobia fishery, an important recreational species in the Southeast Atlantic. For my doctoral research project, I spent six years determining the sources, magnitude, and timing of weakfish mortality across the Atlantic Coast using telemetry, conventional tagging, and predator-prey models. I developed an Index of Biotic Integrity (IBI) for prairie streams of South Dakota for my Master’s thesis, and have been involved in coral reef monitoring on the island of Grenada, lake management plans to mitigate invasive aquatic plants in the Midwest, and maintaining Lake Michigan’s power plants’ compliance to EPA’s 316 (b) mandate.
Research interests:
I enjoy conducting applied fisheries research that informs sound management decisions. I am interested in learning about established methods used in fisheries management, such as mark-recapture and population indices, and am always keen to improve on existing knowledge. I frequently work with collaborators across multiple institutions to address topics of interest in both marine and freshwater environments.
My skillset includes using telemetry, conventional tagging, experimental research designs, and interpreting long-term monitoring data, to better understand the abiotic and biotic barriers to fish population recovery. In addition to traditional field observations, I am experienced in quantitative analysis, including hierarchical models across multiple statistical frameworks, mark-recapture, predator-prey interactions, simulations, and writing R code.
Science and Products
The Science of Suckers: What’s driving population declines in the Klamath River basin?
USGS and its partners are working tirelessly to monitor suckers and understand why they are disappearing from lakes and streams in the Klamath River Basin
Sucker Nets on Upper Klamath Lake
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
Map of Sucker Nets on Upper Klamath Lake
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
Endangered Klamath Sucker
This is a photo of the endangered Klamath Sucker in Upper Klamath Lake, OR. Through decades of research, scientists of the USGS Western Fisheries Research Center have determined that, over the last 30 years, something has prevented young suckers from reaching adulthood.
This is a photo of the endangered Klamath Sucker in Upper Klamath Lake, OR. Through decades of research, scientists of the USGS Western Fisheries Research Center have determined that, over the last 30 years, something has prevented young suckers from reaching adulthood.
Pelican on Upper Klamath Lake
Since 2009, the WFRC has partnered with Real Time Research to study bird predation of suckers. Scientists scan large nesting sites of fish-eating (piscivorous) birds, looking for PIT tags from juvenile and adult suckers that have been eaten by the birds.
Since 2009, the WFRC has partnered with Real Time Research to study bird predation of suckers. Scientists scan large nesting sites of fish-eating (piscivorous) birds, looking for PIT tags from juvenile and adult suckers that have been eaten by the birds.
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, OR
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, ORLost River and Shortnose suckers are on the verge of extinction in Upper Klamath Lake. Age data indicate that almost all adult suckers remaining in the lake spawning populations were hatched in the early 1990s.
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, OR
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, ORLost River and Shortnose suckers are on the verge of extinction in Upper Klamath Lake. Age data indicate that almost all adult suckers remaining in the lake spawning populations were hatched in the early 1990s.
Juvenile Sucker in Upper Klamath Lake, OR
This is a video of a juvenile sucker in Upper Klamath Lake, OR. Through decades of research, scientists at the USGS Western Fisheries Research Center have determined that over the last 30 years something has prevented young suckers from reaching adulthood. Scientists work tirelessly to find the cause of this break in recruitment into adulthood.
This is a video of a juvenile sucker in Upper Klamath Lake, OR. Through decades of research, scientists at the USGS Western Fisheries Research Center have determined that over the last 30 years something has prevented young suckers from reaching adulthood. Scientists work tirelessly to find the cause of this break in recruitment into adulthood.
Juvenile Sucker Sampling on Upper Klamath Lake, OR
Juvenile Sucker Sampling on Upper Klamath Lake, ORThis is a video of fieldwork in Upper Klamath Lake, OR. Here, biologists sample for juvenile suckers, an endangered fish species in the lake.
Juvenile Sucker Sampling on Upper Klamath Lake, OR
Juvenile Sucker Sampling on Upper Klamath Lake, ORThis is a video of fieldwork in Upper Klamath Lake, OR. Here, biologists sample for juvenile suckers, an endangered fish species in the lake.
Science and Products
The Science of Suckers: What’s driving population declines in the Klamath River basin?
USGS and its partners are working tirelessly to monitor suckers and understand why they are disappearing from lakes and streams in the Klamath River Basin
Sucker Nets on Upper Klamath Lake
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
Map of Sucker Nets on Upper Klamath Lake
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
This is a map of the nets on the Upper Klamath Lake in Oregon. The Western Fisheries Research Center carefully monitors juvenile Sucker populations for signs of population recovery and to better understand where they habitate.
Endangered Klamath Sucker
This is a photo of the endangered Klamath Sucker in Upper Klamath Lake, OR. Through decades of research, scientists of the USGS Western Fisheries Research Center have determined that, over the last 30 years, something has prevented young suckers from reaching adulthood.
This is a photo of the endangered Klamath Sucker in Upper Klamath Lake, OR. Through decades of research, scientists of the USGS Western Fisheries Research Center have determined that, over the last 30 years, something has prevented young suckers from reaching adulthood.
Pelican on Upper Klamath Lake
Since 2009, the WFRC has partnered with Real Time Research to study bird predation of suckers. Scientists scan large nesting sites of fish-eating (piscivorous) birds, looking for PIT tags from juvenile and adult suckers that have been eaten by the birds.
Since 2009, the WFRC has partnered with Real Time Research to study bird predation of suckers. Scientists scan large nesting sites of fish-eating (piscivorous) birds, looking for PIT tags from juvenile and adult suckers that have been eaten by the birds.
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, OR
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, ORLost River and Shortnose suckers are on the verge of extinction in Upper Klamath Lake. Age data indicate that almost all adult suckers remaining in the lake spawning populations were hatched in the early 1990s.
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, OR
Nets Used to Sample Juvenile Suckers in Upper Klamath Lake, ORLost River and Shortnose suckers are on the verge of extinction in Upper Klamath Lake. Age data indicate that almost all adult suckers remaining in the lake spawning populations were hatched in the early 1990s.
Juvenile Sucker in Upper Klamath Lake, OR
This is a video of a juvenile sucker in Upper Klamath Lake, OR. Through decades of research, scientists at the USGS Western Fisheries Research Center have determined that over the last 30 years something has prevented young suckers from reaching adulthood. Scientists work tirelessly to find the cause of this break in recruitment into adulthood.
This is a video of a juvenile sucker in Upper Klamath Lake, OR. Through decades of research, scientists at the USGS Western Fisheries Research Center have determined that over the last 30 years something has prevented young suckers from reaching adulthood. Scientists work tirelessly to find the cause of this break in recruitment into adulthood.
Juvenile Sucker Sampling on Upper Klamath Lake, OR
Juvenile Sucker Sampling on Upper Klamath Lake, ORThis is a video of fieldwork in Upper Klamath Lake, OR. Here, biologists sample for juvenile suckers, an endangered fish species in the lake.
Juvenile Sucker Sampling on Upper Klamath Lake, OR
Juvenile Sucker Sampling on Upper Klamath Lake, ORThis is a video of fieldwork in Upper Klamath Lake, OR. Here, biologists sample for juvenile suckers, an endangered fish species in the lake.