CalCOFI marine mammal surveys 2004-2008 - on effort

Annie Douglas

doi:10.15468/rykbmm

CalCOFI marine mammal surveys 2004-2008 - on effort

Citation

Douglas, A. 2012. CalCOFI marine mammal surveys 2004-2008 - on effort. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/792) on yyyy-mm-dd. https://doi.org/10.15468/rykbmm accessed via GBIF.org on 2024-12-12.

Description

Original provider: Annie Douglas, Cascadia Research Collective Dataset credits: Annie B. Douglas, Cascadia Research Abstract: From July 2004 to April 2008 dedicated visual observers following consistent line-transect methods (Buckland et al., 1993; Kinzey et al., 2003) observed from the CalCOFI platforms on quarterly cruises. Observers used handheld 7X50 reticle Fujinon binoculars to sight, identify, and make school size estimates of cetaceans and pinnipeds encountered along the transect lines between CalCOFI water sampling stations. The southern water sampling stations are set along six, parallel lines running southwest to northeast, with lines increasing in length from north to south (470 – 700 km) and stations occurring every 37 km in coastal and continental shelf waters and every 74 km offshore. Three research vessels were used for the sixteen surveys, Scripps Institution of Oceanography Roger Revelle (2 surveys) and New Horizon (8 surveys) and, NOAA David Starr Jordan (6 surveys), vessel height varied from 8.1-13.2m and survey speed varied from 10 to 12 knots. Purpose: The waters off southern California are remarkably diverse and species rich, but they are also an area of swift commercial development, navy training activity, population growth and climate change. Continued visual marine mammal and seabird surveys working in concert with oceanographic ecosystem investigations are essential for monitoring the health and changes of the California current system. Supplemental information: Effort tracklines, two Delphinus delphis sightings in 2005 and one in 2006, overlap with data published in the CalCOFI and NMFS Seabird and Marine Mammal Observation Data, 1987-2006 dataset. However, data collected for this dataset used different methods and observers. Please contact the primary contact listed for more details.

Purpose

The waters off southern California are remarkably diverse and species rich, but they are also an area of swift commercial development, navy training activity, population growth and climate change. Continued visual marine mammal and seabird surveys working in concert with oceanographic ecosystem investigations are essential for monitoring the health and changes of the California current system.

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).

Balaenoptera acutorostrata
common name: Minke Whale rank: species
Berardius bairdii
common name: Baird's Beaked Whale rank: species
Balaenoptera
common name: baleen whales rank: genus
Balaenoptera musculus
common name: Blue Whale rank: species
Balaenoptera physalus
common name: Fin Whale rank: species
Delphinus capensis
common name: Long-beaked Common Dolphin rank: species
Delphinus delphis
common name: Short-beaked Common Dolphin rank: species
Delphinus
common name: common dolphins rank: genus
Eschrichtius robustus
common name: Gray Whale rank: species
Grampus griseus
common name: Risso's Dolphin rank: species
Globicephala macrorhynchus
common name: Short-finned Pilot Whale rank: species
Lissodelphis borealis
common name: Northern Right Whale Dolphin rank: species
Lagenorhynchus obliquidens
common name: Pacific White-sided Dolphin rank: species
Megaptera novaeangliae
common name: Humpback Whale rank: species
Orcinus orca
common name: Killer Whale rank: species
Pseudorca crassidens
common name: False Killer Whale rank: species
Phocoenoides dalli
common name: Dall's Porpoise rank: species
Physeter macrocephalus
common name: Sperm Whale rank: species
Phocoena phocoena
common name: Harbor Porpoise rank: species
Stenella coeruleoalba
common name: Striped Dolphin rank: species
Tursiops truncatus
common name: Common Bottlenose Dolphin rank: species
Delphinidae
common name: dolphins rank: family
Mesoplodon
common name: beaked whales rank: genus
Cetacea
common name: cetaceans rank: order
Cetacea
common name: cetaceans rank: order
Ziphius cavirostris
common name: Cuvier's Beaked Whale rank: species

Geographic Coverages

Oceans

Bibliographic Citations

Contacts

Annie Douglas
originator
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org

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

Annie Douglas
owner
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org

Annie Douglas
administrative point of contact
position: Primary contact
Cascadia Research Collective
email: ABDouglas@cascadiaresearch.org
homepage: http://www.cascadiaresearch.org