Zobrazeno 1 - 10
of 576
pro vyhledávání: '"John A. Hildebrand"'
Autor:
Morgan A. Ziegenhorn, John A. Hildebrand, Erin M. Oleson, Robin W. Baird, Simone Baumann-Pickering
Publikováno v:
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-14 (2023)
Abstract Understanding environmental drivers of species’ behavior is key for successful conservation. Within cetacean research, studies focused on understanding such drivers often consider local conditions (e.g., sea surface temperature), but rarel
Externí odkaz:
https://doaj.org/article/7dc43415a53c421ea9e7177436fda72d
Autor:
Andrew R. Thompson, Rasmus Swalethorp, Michaela Alksne, Jarrod A. Santora, Elliott L. Hazen, Andrew Leising, Erin Satterthwaite, William J. Sydeman, Clarissa R. Anderson, Toby D. Auth, Simone Baumann-Pickering, Timothy Baumgardner, Eric P. Bjorkstedt, Steven J. Bograd, Noelle M. Bowlin, Brian J. Burke, Elizabeth A. Daly, Heidi Dewar, John C. Field, Jennifer L. Fisher, Newell Garfield, Ashlyn Gidding, Ralf Goericke, Richard Golightly, Eliana Gómez-Ocampo, Jose Gomez-Valdes, John A. Hildebrand, Kym C. Jacobson, Michael G. Jacox, Jaime Jahncke, Michael Johns, Joshua M. Jones, Bertha Lavaniegos, Nate Mantua, Gerard J. McChesney, Megan E. Medina, Sharon R. Melin, Luis Erasmo Miranda, Cheryl A. Morgan, Catherine F. Nickels, Rachael A. Orben, Jessica M. Porquez, Antonella Preti, Roxanne R. Robertson, Daniel L. Rudnick, Keith M. Sakuma, Carley R. Schacter, Isaac D. Schroeder, Lauren Scopel, Owyn E. Snodgrass, Sarah Ann Thompson, Pete Warzybok, Katherine Whitaker, William Watson, Edward D. Weber, Brian Wells
Publikováno v:
Frontiers in Marine Science, Vol 11 (2024)
2022 marked the third consecutive La Niña and extended the longest consecutive stretch of negative Oceanic Niño Index since 1998-2001. While physical and biological conditions in winter and spring largely adhered to prior La Niña conditions, summe
Externí odkaz:
https://doaj.org/article/f71e0400449d471a8acf0e6cdc8909a8
Autor:
Annebelle C. M. Kok, Maya J. Hildebrand, Maria MacArdle, Anthony Martinez, Lance P. Garrison, Melissa S. Soldevilla, John A. Hildebrand
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-11 (2023)
Abstract Rorqual foraging behavior varies with species, prey type and foraging conditions, and can be a determining factor for their fitness. Little is known about the foraging ecology of Rice’s whales (Balaenoptera ricei), an endangered species wi
Externí odkaz:
https://doaj.org/article/ce95a9b750064226a02aba165b755854
Echolocation repetition rate as a proxy to monitor population structure and dynamics of sperm whales
Publikováno v:
Remote Sensing in Ecology and Conservation, Vol 8, Iss 6, Pp 827-840 (2022)
Abstract Characterizing population structure and dynamics is critical for the conservation of endangered species. Monitoring sperm whales Physeter macrocephalus is especially difficult because it requires monitoring different latitudes to capture the
Externí odkaz:
https://doaj.org/article/c7bf4275325b4613b572ffbbe98fc33f
Autor:
Joshua M. Jones, John A. Hildebrand, Bruce J. Thayre, Ellen Jameson, Robert J. Small, Sean M. Wiggins
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-15 (2022)
Abstract Bowhead whales (Balaena mysticetus) face threats from diminishing sea ice and increasing anthropogenic activities in the Arctic. Passive acoustic monitoring is the most effective means for monitoring their distribution and population trends,
Externí odkaz:
https://doaj.org/article/c5ac22d0b2a44831b5d5d64b9e77d650
Autor:
Vanessa M. ZoBell, Kaitlin E. Frasier, Jessica A. Morten, Sean P. Hastings, Lindsey E. Peavey Reeves, Sean M. Wiggins, John A. Hildebrand
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
Abstract Commercial shipping is the dominant source of low-frequency noise in the ocean. It has been shown that the noise radiated by an individual vessel depends upon the vessel’s speed. This study quantified the reduction in source levels (SLs) a
Externí odkaz:
https://doaj.org/article/afbfe6ff3516408ab0a889515d7a4a8c
Autor:
Kaitlin E. Frasier, Lance P. Garrison, Melissa S. Soldevilla, Sean M. Wiggins, John A. Hildebrand
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
Abstract Distribution models are needed to understand spatiotemporal patterns in cetacean occurrence and to mitigate anthropogenic impacts. Shipboard line-transect visual surveys are the standard method for estimating abundance and describing the dis
Externí odkaz:
https://doaj.org/article/f8d34cef314d4e9ea25cce8ff4539666
Autor:
Morgan A. Ziegenhorn, Kaitlin E. Frasier, John A. Hildebrand, Erin M. Oleson, Robin W. Baird, Sean M. Wiggins, Simone Baumann-Pickering
Publikováno v:
PLoS ONE, Vol 17, Iss 4 (2022)
Passive acoustic monitoring (PAM) has proven a powerful tool for the study of marine mammals, allowing for documentation of biologically relevant factors such as movement patterns or animal behaviors while remaining largely non-invasive and cost effe
Externí odkaz:
https://doaj.org/article/7d808eb0eb724dee894445b31a8cced3
Autor:
John A. Hildebrand, Kaitlin E. Frasier, Simone Baumann-Pickering, Sean M. Wiggins, Karlina P. Merkens, Lance P. Garrison, Melissa S. Soldevilla, Mark A. McDonald
Publikováno v:
Frontiers in Marine Science, Vol 6 (2019)
Pygmy sperm whales (Kogia breviceps) and dwarf sperm whales (Kogia sima) are deep diving cetaceans that commonly strand along the coast of the southeast US, but that are difficult to study visually at sea because of their elusive behavior. Convention
Externí odkaz:
https://doaj.org/article/68f4123235994c01aba779cc1f3b70f6
Autor:
Elizabeth A. Becker, Karin A. Forney, Bruce J. Thayre, Amanda J. Debich, Gregory S. Campbell, Katherine Whitaker, Annie B. Douglas, Anita Gilles, Ryan Hoopes, John A. Hildebrand
Publikováno v:
Frontiers in Marine Science, Vol 4 (2017)
Managing marine species effectively requires spatially and temporally explicit knowledge of their density and distribution. Habitat-based density models, a type of species distribution model (SDM) that uses habitat covariates to estimate species dens
Externí odkaz:
https://doaj.org/article/041533d6359141828f0bd2eabc09a981