NEFSC Marine Mammal Abundance Cruise 2004 Passive Acoustic Monitoring - Rainbow Click Detections

Sofie Van Parijs

doi:10.15468/724bvn

NEFSC Marine Mammal Abundance Cruise 2004 Passive Acoustic Monitoring - Rainbow Click Detections

Citation

Van Parijs, S. 2013. NEFSC Marine Mammal Abundance Cruise 2004 Passive Acoustic Monitoring - Rainbow Click Detections. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/509) on yyyy-mm-dd. https://doi.org/10.15468/724bvn accessed via GBIF.org on 2022-05-22.

Description

Original provider: NOAA Northeast Fisheries Science Center (NEFSC) Dataset credits: Sofie Van Parijs Abstract: The primary objectives of the survey were to: (1) determine the spatial distribution and abundance of cetaceans and turtles in the study region, (2) determine the spatial distribution and relative abundance of sea birds in the same region, and (3) use passive acoustics to record vocalizing cetaceans that will hopefully be used to improve the abundance estimates derived from the visual surveys. A secondary objective was to compare the distribution of these species with each other, physical characteristics, such as depth contours and water temperature, and biological characteristics, such as relative plankton distributions. Purpose: A total of 241 sperm whales were detected during Leg 1 and 220 during Leg 2. Note that sperm whale encounters may not be independent and these numbers are likely to over estimates. Rainbow Click (medium frequency click detector) detected clicks 53,804 attributed to sperm whales and 2428 clicks to dolphin. Clicks were grouped into events attributed to individual sperm whales and dolphin groups. Where it was not possible to attribute clicks to individual animals estimates of group size associated with an event are given as low, best and high. Note that these events do not reflect the total number of vocalizing cetaceans, nor do they reflect the total number of encounters with cetaceans. Supplemental information: Rainbow Click is a software based click detector developed by Douglas Gillespie for the International Fund for Animal Welfare. It was originally developed to detect the broadband clicks of sperm whales and some dolphin species; although recent hardware developments now allow it to detect narrow band ultrasonic clicks made by Phocena spp. or Kogia spp. The latest implementation of Rainbow Click is in the PAMGUARD software. Currently (2009), Automated species classifiers exist for sperm whales and Phocena spp. New click classifiers are now under development for beaked whales, north Atlantic dolphin species and Kogia spp. at the Sea Mammal Research Unit, University of St. Andrews. Time Of Arrival Differences (TODA) are used to calculate bearings to detected clicks, and clicks are grouped into click trains by an experienced operator. Click trains typically represent one animal. Crossed bearings are used to determine the location of the vocalizing animals. Additional attributes caveat: The ranges and bearings associated with these data have not been validated or corrected in any way so they may vary from fairly accurate to completely wrong.

Purpose

A total of 241 sperm whales were detected during Leg 1 and 220 during Leg 2. Note that sperm whale encounters may not be independent and these numbers are likely to over estimates. Rainbow Click (medium frequency click detector) detected clicks 53,804 attributed to sperm whales and 2428 clicks to dolphin. Clicks were grouped into events attributed to individual sperm whales and dolphin groups. Where it was not possible to attribute clicks to individual animals estimates of group size associated with an event are given as low, best and high. Note that these events do not reflect the total number of vocalizing cetaceans, nor do they reflect the total number of encounters with cetaceans.

Sampling Description

Study Extent

NA

Sampling

NA

Method steps

NA

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Globicephala
common name: pilot whales rank: genus
Odontoceti
common name: toothed whales rank: suborder
Physeter macrocephalus
common name: Sperm Whale rank: species
Odontoceti
common name: toothed whales rank: suborder
Delphinidae
common name: dolphins rank: family
Odontoceti
common name: toothed whales rank: suborder

Geographic Coverages

Oceans

Bibliographic Citations

Contacts

Sofie Van Parijs
originator
position: Primary contact
NOAA Northeast Fisheries Science Center
email: sofie.vanparijs@noaa.gov
homepage: http://www.nefsc.noaa.gov/psb/acoustics/index.html

OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: https://seamap.env.duke.edu

OBIS-SEAMAP
distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: https://seamap.env.duke.edu

Sofie Van Parijs
owner
position: Primary contact
NOAA Northeast Fisheries Science Center
email: sofie.vanparijs@noaa.gov
homepage: http://www.nefsc.noaa.gov/psb/acoustics/index.html

Sofie Van Parijs
administrative point of contact
position: Primary contact
NOAA Northeast Fisheries Science Center
email: sofie.vanparijs@noaa.gov
homepage: http://www.nefsc.noaa.gov/psb/acoustics/index.html