Justin K Clause (Former Employee)
Science and Products
Abundance and Distribution of Fishes in Clear Lake, Lake County, California (ver. 3.0, December 2025) Abundance and Distribution of Fishes in Clear Lake, Lake County, California (ver. 3.0, December 2025)
Field data for fishes sampled using bottom and surface gill nets during daylight hours in Clear Lake, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis.
Distribution and stomach contents of fishes in the northern Sacramento-San Joaquin Delta, 2020-2022 Distribution and stomach contents of fishes in the northern Sacramento-San Joaquin Delta, 2020-2022
This data set includes count, location, and ancillary habitat data for fishes sampled in adjacent reaches of Georgiana Slough, Sacramento River, and Steamboat Slough in the northern Sacramento-San Joaquin Delta. It also includes data on the stomach contents of selected individual black basses (Micropterus). Fishes were sampled by boat electrofishing from approximately January-May, 2020...
Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022) Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022)
Comma-separated values (.csv) file containing data related to mercury in fishes collected from Clear Lake, California. These data are superseded by Pierce, J.R., Feyrer, F.V., Young, M.J., Enos, E.R., Clause, J.K., Alpers, C.N., and Eagles-Smith, C.A., 2022, Mercury in biota from Clear Lake, California (ver. 3.0, August 2024): U.S. Geological Survey data release, https://doi.org/10.5066...
Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022) Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022)
Field data for fishes sampled using bottom and surface gill nets during daylight hours in Clear Lake, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis.
Carbon and nitrogen isotopes of different native fish tissues from the Santa Ana River, California Carbon and nitrogen isotopes of different native fish tissues from the Santa Ana River, California
Objective Stable isotopes are commonly used to understand the role of fishes in aquatic food webs. However, variability in species- and tissue-specific isotopic values can affect the inference that is drawn from a stable isotope study. We evaluated differences in stable isotopes of carbon (δ13C) and nitrogen (δ15N) among three tissue types (white muscle, caudal fin rays, and eye lenses)...
Authors
Brock Huntsman, Matthew Young, Kai Palenscar, Kurt Anderson, William Ota, Jordan Mae-Jean Buxton, Justin K. Clause, Danielle Palm, Jeff Lee Gronemyer, Brett Mills, Kerwin Russell, Rebecca Christensen
Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California
The Clear Lake Hitch (Lavinia exilicauda chi) is a minnow endemic to Clear Lake, Lake County, California. This species is listed as a threatened species under the California Endangered Species Act and has been petitioned for listing under the United States Endangered Species Act. In 2017, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, initiated a...
Authors
Frederick Feyrer, Matthew Young, Brock Huntsman, Veronica Violette, Justin K. Clause, Jordan Buxton, Danielle Palm, Marissa Wulff, Jeff Gronemyer, Luis Santana
Wetland geomorphology and tidal hydrodynamics drive fine-scale fish community composition and abundance Wetland geomorphology and tidal hydrodynamics drive fine-scale fish community composition and abundance
Effective restoration of tidal wetlands for fish communities requires clear goals and mechanistic understanding of the ecosystem drivers which affect fish distribution and abundance. We examined fish community responses to abiotic habitat features in two adjacent but dissimilar freshwater tidal wetlands in the Sacramento-San Joaquin Delta, CA, USA, each of which represents a potential...
Authors
Justin Clause, Mary Farruggia, Frederick Feyrer, Matthew Young
Eye lenses reveal ontogenetic trophic and habitat shifts in an imperiled fish, Clear Lake hitch (Lavinia exilicauda chi) Eye lenses reveal ontogenetic trophic and habitat shifts in an imperiled fish, Clear Lake hitch (Lavinia exilicauda chi)
Stable isotopes recorded in fish eye lenses are an emerging tool to track dietary shifts coincident with use of diverse habitats over the lifetime of individuals. Eye lenses are metabolically inert, sequentially deposited, archival tissues that can open avenues to chronicle contaminant exposures, diet histories, trophic dynamics and migratory histories of individual fishes. In this study...
Authors
Matthew Young, Veronica Violette, Justin Clause, Miranda Bell-Tilcock, George Whitman, Rachel Johnson, Frederick Feyrer
Non-USGS Publications**
Clause, Justin K. 2017. When it counts, size does matter: complex territoriality in Oophaga pumilio (Schmidt, 1857). Mesoamerican Herpetology, 4 (2), pg. 254-262.
Jones S.E.I., Clause J.K., Geeraert L., Jamie G.A., Sumbane E., van Berkel, T. and Jocque M. 2017. The Njesi Plateau expedition: a biological assessment of Mt Chitagal, Mt Sanga and the Njesi Plateau in Niassa Province, Mozambique. BES Report 6.3 (25 October 2017). Biodiversity Inventory for Conservation. Glabbeek, Belgium, 80 pp.
Clause, Justin K. 2017. Mimophis mahfalensis Diet Note2017 Herpetological Review, 48 (2), pg. 454-455. Natural History Notes Section.
Clause, Justin K.; Brown, Tom W. 2017. Additional Information on the Natural History of Anolis cusuco. Mesoamerican Herpetology, 4 (1), pg. 215-218. Misc. Notes Section.
Clause, Justin K.; Clause, Adam G. 2016. Imantodes cenchoa Diet Note. Herpetological Review, 47 (2), pg. 312-313. Natural History Notes Section.
Clause, Justin K. 2016. Rhadinaea (Rhadinella) godmani Distribution Note. Mesoamerican Herpetology, 3 (1), pg. 199. Distribution Notes Section.
Clause, Adam G.; Erdman, James; Buck-Master, Nicholas G.; Tuday, Cleopatra; Hubeek, Nicko-Las; Clause, Justin K. 2014. Batrachoceps campi Distribution Note. Herpetological Review, 45 (2), pg. 273-274. Distribution Notes Section.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Abundance and Distribution of Fishes in Clear Lake, Lake County, California (ver. 3.0, December 2025) Abundance and Distribution of Fishes in Clear Lake, Lake County, California (ver. 3.0, December 2025)
Field data for fishes sampled using bottom and surface gill nets during daylight hours in Clear Lake, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis.
Distribution and stomach contents of fishes in the northern Sacramento-San Joaquin Delta, 2020-2022 Distribution and stomach contents of fishes in the northern Sacramento-San Joaquin Delta, 2020-2022
This data set includes count, location, and ancillary habitat data for fishes sampled in adjacent reaches of Georgiana Slough, Sacramento River, and Steamboat Slough in the northern Sacramento-San Joaquin Delta. It also includes data on the stomach contents of selected individual black basses (Micropterus). Fishes were sampled by boat electrofishing from approximately January-May, 2020...
Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022) Mercury in fishes from Clear Lake, California, 2019 and 2020 (ver. 2.0, February 2022)
Comma-separated values (.csv) file containing data related to mercury in fishes collected from Clear Lake, California. These data are superseded by Pierce, J.R., Feyrer, F.V., Young, M.J., Enos, E.R., Clause, J.K., Alpers, C.N., and Eagles-Smith, C.A., 2022, Mercury in biota from Clear Lake, California (ver. 3.0, August 2024): U.S. Geological Survey data release, https://doi.org/10.5066...
Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022) Abundance and Distribution of Clear Lake Hitch in Clear Lake, Lake County, California, 2017-2022 (ver. 4.0, December 2022)
Field data for fishes sampled using bottom and surface gill nets during daylight hours in Clear Lake, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis.
Carbon and nitrogen isotopes of different native fish tissues from the Santa Ana River, California Carbon and nitrogen isotopes of different native fish tissues from the Santa Ana River, California
Objective Stable isotopes are commonly used to understand the role of fishes in aquatic food webs. However, variability in species- and tissue-specific isotopic values can affect the inference that is drawn from a stable isotope study. We evaluated differences in stable isotopes of carbon (δ13C) and nitrogen (δ15N) among three tissue types (white muscle, caudal fin rays, and eye lenses)...
Authors
Brock Huntsman, Matthew Young, Kai Palenscar, Kurt Anderson, William Ota, Jordan Mae-Jean Buxton, Justin K. Clause, Danielle Palm, Jeff Lee Gronemyer, Brett Mills, Kerwin Russell, Rebecca Christensen
Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California Gillnet sampling methods for monitoring status and trends of Clear Lake Hitch in Clear Lake, Lake County, California
The Clear Lake Hitch (Lavinia exilicauda chi) is a minnow endemic to Clear Lake, Lake County, California. This species is listed as a threatened species under the California Endangered Species Act and has been petitioned for listing under the United States Endangered Species Act. In 2017, the U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, initiated a...
Authors
Frederick Feyrer, Matthew Young, Brock Huntsman, Veronica Violette, Justin K. Clause, Jordan Buxton, Danielle Palm, Marissa Wulff, Jeff Gronemyer, Luis Santana
Wetland geomorphology and tidal hydrodynamics drive fine-scale fish community composition and abundance Wetland geomorphology and tidal hydrodynamics drive fine-scale fish community composition and abundance
Effective restoration of tidal wetlands for fish communities requires clear goals and mechanistic understanding of the ecosystem drivers which affect fish distribution and abundance. We examined fish community responses to abiotic habitat features in two adjacent but dissimilar freshwater tidal wetlands in the Sacramento-San Joaquin Delta, CA, USA, each of which represents a potential...
Authors
Justin Clause, Mary Farruggia, Frederick Feyrer, Matthew Young
Eye lenses reveal ontogenetic trophic and habitat shifts in an imperiled fish, Clear Lake hitch (Lavinia exilicauda chi) Eye lenses reveal ontogenetic trophic and habitat shifts in an imperiled fish, Clear Lake hitch (Lavinia exilicauda chi)
Stable isotopes recorded in fish eye lenses are an emerging tool to track dietary shifts coincident with use of diverse habitats over the lifetime of individuals. Eye lenses are metabolically inert, sequentially deposited, archival tissues that can open avenues to chronicle contaminant exposures, diet histories, trophic dynamics and migratory histories of individual fishes. In this study...
Authors
Matthew Young, Veronica Violette, Justin Clause, Miranda Bell-Tilcock, George Whitman, Rachel Johnson, Frederick Feyrer
Non-USGS Publications**
Clause, Justin K. 2017. When it counts, size does matter: complex territoriality in Oophaga pumilio (Schmidt, 1857). Mesoamerican Herpetology, 4 (2), pg. 254-262.
Jones S.E.I., Clause J.K., Geeraert L., Jamie G.A., Sumbane E., van Berkel, T. and Jocque M. 2017. The Njesi Plateau expedition: a biological assessment of Mt Chitagal, Mt Sanga and the Njesi Plateau in Niassa Province, Mozambique. BES Report 6.3 (25 October 2017). Biodiversity Inventory for Conservation. Glabbeek, Belgium, 80 pp.
Clause, Justin K. 2017. Mimophis mahfalensis Diet Note2017 Herpetological Review, 48 (2), pg. 454-455. Natural History Notes Section.
Clause, Justin K.; Brown, Tom W. 2017. Additional Information on the Natural History of Anolis cusuco. Mesoamerican Herpetology, 4 (1), pg. 215-218. Misc. Notes Section.
Clause, Justin K.; Clause, Adam G. 2016. Imantodes cenchoa Diet Note. Herpetological Review, 47 (2), pg. 312-313. Natural History Notes Section.
Clause, Justin K. 2016. Rhadinaea (Rhadinella) godmani Distribution Note. Mesoamerican Herpetology, 3 (1), pg. 199. Distribution Notes Section.
Clause, Adam G.; Erdman, James; Buck-Master, Nicholas G.; Tuday, Cleopatra; Hubeek, Nicko-Las; Clause, Justin K. 2014. Batrachoceps campi Distribution Note. Herpetological Review, 45 (2), pg. 273-274. Distribution Notes Section.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.