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SIO Southern California HARPs Acoustic Dolphin Detections 2005-2007
Citation
Hildebrand, J. 2011. SIO Southern California HARPs Acoustic Dolphin Detections 2005-2007. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/533) on yyyy-mm-dd.

Access data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Description
The goal of this work was to monitor occurrence of acoustically active cetaceans in the Southern California Bight and develop predictive models of habitat. The data presented here are based on echolocation clicks of Risso's dolphins and Pacific white-sided dolphins. more

The goal of this work was to monitor occurrence of acoustically active cetaceans in the Southern California Bight and develop predictive models of habitat. The data presented here are based on echolocation clicks of Risso's dolphins and Pacific white-sided dolphins. High-frequency Acoustic Recording Packages (HARPs) were deployed at six locations in the Southern California Bight between August 2005 and January 2008 to examine diel, seasonal, and annual patterns of occurrence and distribution. Long term spectral averages (LTSAs) were examined by eye for the presence of echolocation click bouts from Risso's dolphins and Pacific white-sided dolphins. Click bouts were identified to species by a trained analyst based on their spectral characteristics (described in Soldevilla et al. 2008). Observations represent presence in one-hour time bins (#obs) and are quantified as the number of one-minute time bins with clicks present. Two click types, A and B, were identified for Pacific white-sided dolphins, which show spatial and temporal segregation in occurrence. HARP recording schedules varied across deployments and include continuous recording, 1/2, 1/3, and 1/4 duty cycles in which 5 minutes were recorded followed by 5, 10, and 15 minutes off, respectively. Effort data is also available in one-hour time bins and includes the number of minutes with recording effort per hour. Times are in GMT. These data were analyzed by Melissa Soldevilla. This research project was funded by F. Stone and E. Young through CNO-N45.

Scope
Themes:
Biology > Mammals
Keywords:
Marine, I, North Pacific, INE, USA, California, Southern California Bight, Grampus griseus, Lagenorhynchus obliquidens

Geographical coverage
I, North Pacific [Marine Regions]
INE, USA, California, Southern California Bight

Temporal coverage
14 August 2005 - 2 January 2008

Taxonomic coverage
Grampus griseus (G. Cuvier, 1812) [WoRMS]
Lagenorhynchus obliquidens Gill, 1865 [WoRMS]

Contributors
University of California, San Diego; Scripps Institution of Oceanography (SIO), moredata owner

Related datasets
Published in:
OBIS-SEAMAP: Spatial Ecological Analysis of Megavertebrate Populations, more

Dataset status: Completed
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2012-11-27
Information last updated: 2016-06-30
All data in IMIS is subject to the VLIZ privacy policy