Výsledky vyhledávání - "Rex K. Andrew"

Clicking throughout the year: sperm whale clicks in relation to environmental conditions off the west coast of South Africa

Autor: Fannie Welcome Shabangu, Rex K. Andrew

Publikováno v: Endangered Species Research, Vol 43, Pp 475-494 (2020)

Knowledge of cetacean occurrence and behaviour in southern African waters is limited, and passive acoustic monitoring has the potential to address this gap efficiently. Seasonal acoustic occurrence and diel-vocalizing patterns of sperm whales in rela

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c28ecec7487bcdec8db5ad5a193b36ce
https://doi.org/10.3354/esr01089

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Acoustic occurrence, diel‐vocalizing pattern, and detection ranges of southern right whale gunshot sounds off South Africa's west coast

Autor: Rex K. Andrew, Ken P. Findlay, Fannie Welcome Shabangu

Publikováno v: Marine Mammal Science. 37:733-750

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b93549ee4e23e9598273c1a7fbd89fa4
https://doi.org/10.1111/mms.12760

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Acoustic seasonality, behaviour and detection ranges of Antarctic blue and fin whales under different sea ice conditions off Antarctica

Autor: Ken P. Findlay, Fannie Welcome Shabangu, Dawit Yemane, Rex K. Andrew

Publikováno v: Endangered Species Research, Vol 43, Pp 21-37 (2020)

Descriptions of seasonal occurrence and behaviour of Antarctic blue and fin whales in the Southern Ocean are of pivotal importance for the effective conservation and management of these endangered species. We used an autonomous acoustic recorder to c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab7760bc804a9db8e29ff292e994ed56
https://doi.org/10.3354/esr01050

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Year-round acoustic monitoring of Antarctic blue and fin whales in relation to environmental conditions off the west coast of South Africa

Autor: Ishmail S. Letsheleha, Fannie W. Shabangu, Dara Farrell, Rex K. Andrew, Philip L. la Grange, Ken P. Findlay

Publikováno v: Marine Biology. 169

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3582da53ed615789f25cfbcc4a342639
https://doi.org/10.1007/s00227-022-04026-x

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Seasonal occurrence and diel calling behaviour of Antarctic blue whales and fin whales in relation to environmental conditions off the west coast of South Africa

Autor: Kathleen M. Stafford, Bradley Blows, Marcel Van den Berg, Ken P. Findlay, Fannie W. Shabangu, Rex K. Andrew, Dawit Yemane

Publikováno v: Journal of Marine Systems. 190:25-39

Passive acoustic monitoring was used to detect the sounds of rarely sighted Antarctic blue and fin whales to investigate their seasonal occurrence (as presence or absence of whale calls) and behaviour (as determined from call rates) in the Benguela e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0598e08aaa7de3411c1ad354c1924e65
https://doi.org/10.1016/j.jmarsys.2018.11.002

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Temperature-driven seasonal and longer term changes in spatially averaged deep ocean ambient sound at frequencies 63-125 Hz

Autor: Bruce M. Howe, James A. Mercer, Rex K. Andrew, Michael A. Ainslie

Publikováno v: The Journal of the Acoustical Society of America. 149(4)

The soundscape of the Northeast Pacific Ocean is studied with emphasis on frequencies in the range 63–125 Hz. A 34-year (1964–1998) increase and seasonal fluctuations (1994–2006) are investigated. This is achieved by developing a simple relatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f27f312c73ea5f7e77a1738df263804
https://pubmed.ncbi.nlm.nih.gov/33940862

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Observations of low-frequency, long-range acoustic propagation in the Philippine Sea and comparisons with mode transport theory

Autor: Tarun K. Chandrayadula, Rex K. Andrew, John A. Colosi, Sivaselvi Periyasamy, Peter F. Worcester, James A. Mercer, Matthew A. Dzieciuch

Publikováno v: The Journal of the Acoustical Society of America. 147(2)

The year-long Philippine Sea (2010–2011) experiment (PhilSea) was an extensive deep water acoustic propagation experiment in which there were six different sources transmitting to a water column spanning a vertical line array. The six sources were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec59f4e9d625ea22934d9d40683b8292
https://pubmed.ncbi.nlm.nih.gov/32113322

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Deep water acoustic range estimation based on an ocean general circulation model: Application to PhilSea10 data

Autor: Andrew W. White, Matthew A. Dzieciuch, Peter F. Worcester, Mengyu Wu, M. P. Barmin, Rex K. Andrew, James A. Mercer, Peter B. Weichman, Michael H. Ritzwoller, Eugene M. Lavely

Publikováno v: The Journal of the Acoustical Society of America. 146(6)

This study identifies general characteristics of methods to estimate the absolute range between an acoustic transmitter and a receiver in the deep ocean. The data are from three days of the PhilSea10 experiment with a single fixed transmitter depth (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42f624694cfeacefd1dbe9771f6c188a
https://pubmed.ncbi.nlm.nih.gov/31893754

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Internal tides and deep diel fades in acoustic intensity

Autor: Rex K. Andrew, Peter F. Worcester, John A. Colosi, Andrew W. White, Matthew A. Dzieciuch, James A. Mercer, Frank S. Henyey

Publikováno v: The Journal of the Acoustical Society of America. 140:3952-3962

A mechanism is presented by which the observed acoustic intensity is made to vary due to changes in the acoustic path that are caused by internal-tide vertical fluid displacements. The position in range and depth of large-scale caustic structure is d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::754c03d812330ede72649cb36a6b731d
https://doi.org/10.1121/1.4967854

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