Blue and Fin Whale Habitat Modeling from Long-Term Year-Round Passive Acoustic Data from the Southern California Bight

2014 ◽  
Author(s):  
Ana Sirovic ◽  
John A. Hildebrand
Keyword(s):  
Southern California ◽  
Habitat Modeling ◽  
Southern California Bight ◽  
Fin Whale ◽  
Acoustic Data ◽  
Passive Acoustic

Long‐term Passive Acoustic Monitoring of Delphinids in the Southern California Bight

2008 ◽  
Vol 123 (5) ◽  
pp. 3101-3101
Author(s):  
Melissa S. Soldevilla ◽  
John A. Hildebrand ◽  
Sean M. Wiggins ◽  
Marie A. Roch
Keyword(s):  
Southern California ◽  
Acoustic Monitoring ◽  
Southern California Bight ◽  
Passive Acoustic Monitoring ◽  
Passive Acoustic

scholarly journals Rockfish sounds and their potential use for population monitoring in the Southern California Bight

2009 ◽  
Vol 66 (6) ◽  
pp. 981-990 ◽  
Author(s):  
Ana Širović ◽  
George R. Cutter ◽  
John L. Butler ◽  
David A. Demer
Keyword(s):  
Southern California ◽  
Low Frequency ◽  
Population Monitoring ◽  
Southern California Bight ◽  
Acoustic Data ◽  
Recorded Sound ◽  
Underwater Cameras ◽  
Abundance Estimates ◽  
Passive Acoustic ◽  
Potential Use

Abstract Širović, A., Cutter, G. R., Butler, J. L., and Demer, D. A. 2009. Rockfish sounds and their potential use for population monitoring in the Southern California Bight. – ICES Journal of Marine Science, 66: 981–990. Non-lethal methods are being developed to assess and monitor the depleted rockfish stocks off southern California. For example, data from multifrequency echosounders and underwater cameras have been combined to map the dispersions and estimate the abundances of rockfish at the historical fishing sites within this region. From August to October 2007, this ship-based technique was augmented with two passive-acoustic moored recorders. One collected data at the 43 Fathom Bank for 46 days, while the other was serially deployed at 13 locations for shorter periods (1–8 d). Passive-acoustic data were analysed for the presence of rockfish sounds. Potential sources of five pulsing sounds were identified from the optically estimated species compositions at each location, as well as from known rockfish recordings collected in aquaria. All sounds had a low frequency (<900 Hz). Some were short, individual pulses (≤0.1 s), others were repetitive. A repetitive pulsing from bocaccio (Sebastes paucispinis) was the most commonly recorded sound and it occurred mainly at night. The daily calling rates at each site were quantitatively compared with the rockfish abundance estimates obtained from the active-acoustic survey, and they were positively correlated. The feasibility of using passive-acoustic tools to monitor changes in rockfish populations efficiently is discussed.

Blue and fin whales in the Southern California Bight: Using long‐term acoustic records and acoustic recording tags

2004 ◽  
Vol 116 (4) ◽  
pp. 2588-2588 ◽  
Author(s):  
Erin M. Oleson ◽  
John Calambokidis ◽  
Sean M. Wiggins ◽  
John A. Hildebrand
Keyword(s):  
Southern California ◽  
Southern California Bight ◽  
Fin Whales ◽  
Acoustic Recording

Long-term fish monitoring in the Southern California Bight

2011 ◽  
Vol 130 (4) ◽  
pp. 2499-2499
Author(s):  
Ana Širović ◽  
David A. Demer ◽  
Sean M. Wiggins ◽  
John A. Hildebrand
Keyword(s):  
Southern California ◽  
Southern California Bight ◽  
Fish Monitoring

scholarly journals Long-Term Patterns of Noise From Underwater Explosions and Their Relation to Fisheries in Southern California

2021 ◽  
Vol 8 ◽  
Author(s):  
Anna Krumpel ◽  
Ally Rice ◽  
Kaitlin E. Frasier ◽  
Fairlie Reese ◽  
Jennifer S. Trickey ◽  
...  
Keyword(s):  
Southern California ◽  
Temporal Patterns ◽  
Purse Seine ◽  
Economic Losses ◽  
Negative Effects ◽  
Underwater Explosions ◽  
Marine Life ◽  
Spatio Temporal ◽  
Passive Acoustic

Acoustic deterrents can reduce marine mammal interactions with fisheries and aquacultures, but they contribute to an increasing level of underwater noise. In Southern California, commercially produced explosive deterrents, commonly known as “seal bombs,” are used to protect fishing gear and catch from pinniped predation, which can cause extensive economic losses for the fishing community. Passive acoustic monitoring data collected between 2005 and 2016 at multiple sites within the Southern California Bight and near Monterey Bay revealed high numbers of these small-charge underwater explosions, long-term, spatio-temporal patterns in their occurrence, and their relation to different commercial purse-seine fishing sectors. The vast majority of explosions occurred at nighttime and at many nearshore sites high explosion counts were detected, up to 2,800/day. Received sound exposure levels of up to 189 dB re 1 μPa2-s indicate the potential for negative effects on marine life, especially in combination with the persistence of recurring explosions during periods of peak occurrence. Due to the highly significant correlation and similar spatio-temporal patterns of market squid landings and explosion occurrence at many sites, we conclude that the majority of the recorded explosions come from seal bombs being used by the California market squid purse-seine fishery. Additionally, seal bomb use declined over the years of the study, potentially due to a combination of reduced availability of market squid driven by warm water events in California and regulation enforcement. This study is the first to provide results on the distribution and origin of underwater explosions off Southern California, but there is a substantial need for further research on seal bomb use in more recent years and their effects on marine life, as well as for establishing environmental regulations on their use as a deterrent.

Advanced Technique for Automatic Detection and Discrimination of a Click Train With Short Interclick Intervals From the Clicks of Ganges River Dolphins (Platanista gangetica gangetica) Recorded by a Passive Acoustic Monitoring System Using Hydrophone Arrays

2014 ◽  
Vol 48 (3) ◽  
pp. 167-181 ◽  
Author(s):  
Harumi Sugimatsu ◽  
Junichi Kojima ◽  
Tamaki Ura ◽  
Rajendar Bahl ◽  
Sandeep Behera ◽  
...  
Keyword(s):  
Acoustic Monitoring ◽  
Ganges River ◽  
Passive Acoustic Monitoring ◽  
Advanced Technique ◽  
Acoustic Data ◽  
Click Train ◽  
Passive Acoustic ◽  
The Ganges

AbstractTo understand the biosonar click characteristics of Ganges river dolphins (adults, young adults, and calves) in a wild environment along with periodic visual observations, an ongoing program for long-term in situ monitoring has been carried out using a passive acoustic monitoring (PAM) system. During monitoring phase 4 (2012), migrating Ganges river dolphin groups with small calves were visually observed, and click trains having a short interclick interval (ICI: from 6 to 12 ms) were concurrently found from the acoustic data corresponding to the period. Click trains having a short ICI have also been observed in other small-toothed whales during foraging and socializing activities (called buzz) (Thoms, Moss, & Vater, 2004; Simard & Mann, 2008). For analysis of the short ICI click trains produced by the Ganges river dolphins, an advanced technique that automatically detects and discriminates a “short ICI click train” from other click sequences during the selected periods of data recorded by a PAM system was developed. For a robust algorithm, a smaller mean ICI caused by overlapping click trains from multiple dolphins that fulfill the range of ICI values that may get incorrectly labeled as “short ICI click train” was considered to judiciously detect a reliable click train. By applying the selected parameters and ICI values (default or given), the performance of the proposed technique was demonstrated using sample data. The results showed the reliability of the technique for the extraction of a variety of short ICI click trains from other click trains.

scholarly journals Δ14C and Δ13C of Seawater DIC as Tracers of Coastal Upwelling: A 5-Year Time Series from Southern California

Radiocarbon ◽  
2011 ◽  
Vol 53 (4) ◽  
pp. 669-677 ◽  
Author(s):  
Guaciara M Santos ◽  
Julie Ferguson ◽  
Karla Acaylar ◽  
Kathleen R Johnson ◽  
Sheila Griffin ◽  
...  
Keyword(s):  
Time Series ◽  
Ocean Circulation ◽  
Southern California ◽  
Inorganic Carbon ◽  
Coastal Upwelling ◽  
Dissolved Inorganic Carbon ◽  
Southern California Bight ◽  
Surface Seawater ◽  
Upwelling Event

Marine radiocarbon (14C) is a widely used tracer of past ocean circulation, but very few high-resolution records have been obtained. Here, we report a time series of carbon isotope abundances of dissolved inorganic carbon (DIC) in surface seawater collected from the Newport Beach pier in Orange County, within the Southern California Bight, from 2005 to 2010. Surface seawater was collected bimonthly and analyzed for Δ14C, δ13C, and salinity. Results from May 2005 to November 2010 show no long-term changes in δ13C DIC values and no consistent variability that can be attributed to upwelling. Δ14C DIC values have lowered from ∼34‰ to about ∼16‰, an 18‰ decrease from the beginning of this project in 2005, and is consistent with the overall 14C depletion from the atmospheric thermonuclear bomb pulse at the end of the 1950s. Δ14C DIC values, paired with salinity, do appear to be suitable indicators of upwelling strength with periods of upwelling characterized by more saline and lower DIC Δ14C values. However, a similar signal was not observed during the strong upwelling event of 2010. These results were obtained in the Southern California Bight where upwelling is fairly weak and there is a complex occanographic circulation in comparison with the remaining western USA coastline. It is therefore likely that the link between DIC Δ14C, salinity, and upwelling would be even stronger at other sites. These data represent the longest time series of Δ14C data from a coastal Southern California site performed to date.

scholarly journals Seven years of blue and fin whale call abundance in the Southern California Bight

2015 ◽  
Vol 28 (1) ◽  
pp. 61-76 ◽  
Author(s):  
A Širovic ◽  
A Rice ◽  
E Chou ◽  
JA Hildebrand ◽  
SM Wiggins ◽  
...  
Keyword(s):  
Southern California ◽  
Southern California Bight ◽  
Fin Whale

scholarly journals Underwater Soundscape Monitoring and Fish Bioacoustics: A Review

Fishes ◽  
2018 ◽  
Vol 3 (3) ◽  
pp. 36 ◽  
Author(s):  
Adelaide Lindseth ◽  
Phillip Lobel
Keyword(s):  
Data Analysis ◽  
Data Storage ◽  
Sampling Methods ◽  
Acoustic Monitoring ◽  
Passive Acoustic Monitoring ◽  
Acoustic Data ◽  
Soundscape Ecology ◽  
Ambient Sound ◽  
Passive Acoustic

Soundscape ecology is a rapidly growing field with approximately 93% of all scientific articles on this topic having been published since 2010 (total about 610 publications since 1985). Current acoustic technology is also advancing rapidly, enabling new devices with voluminous data storage and automatic signal detection to define sounds. Future uses of passive acoustic monitoring (PAM) include biodiversity assessments, monitoring habitat health, and locating spawning fishes. This paper provides a review of ambient sound and soundscape ecology, fish acoustic monitoring, current recording and sampling methods used in long-term PAM, and parameters/metrics used in acoustic data analysis.

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