A Characterization of Deep-sea Coral and Sponge Communities in Areas of High Bycatch in Bottom Trawls Off Northern California PDF Download
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Author: Mary M. Yoklavich
Publisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 39
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Book Description
"Using an autonomous underwater vehicle (AUV) and towed camera system (TCS), deep-sea corals, sponges, and seafloor habitats were visually surveyed for the first time in areas of longtime trawl fishing off northern California. During an 11-day cruise aboard the R/V Point Sur 8-18 September 2014, researchers completed 6 dives with the AUV and 9 deployments of the TCS, and spent over 42 hours underwater at depths of 586-1169 meters from the Oregon- California border to the Mendocino Ridge (...) This report provides a summary of the methods and results from these underwater surveys of DSC&S off northern California. This was a collaborative effort among investigators from NOAA National Marine Fisheries Service (Southwest Fisheries Science Center, Northwest Fisheries Science Center [NWFSC], Pacific Islands Fisheries Science Center [PIFSC], and Alaska Fisheries Science Center [AFSC]) and several universities including California State University (Humboldt State University and Moss Landing Marine Laboratories), University of California Santa Cruz, and Oregon State University"--Page 1. [doi:10.7289/V5/TM-SWFSC-556 (http://dx.doi.org/10.7289/V5/TM-SWFSC-556)]
Author: Mary M. Yoklavich
Publisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 39
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Book Description
"Using an autonomous underwater vehicle (AUV) and towed camera system (TCS), deep-sea corals, sponges, and seafloor habitats were visually surveyed for the first time in areas of longtime trawl fishing off northern California. During an 11-day cruise aboard the R/V Point Sur 8-18 September 2014, researchers completed 6 dives with the AUV and 9 deployments of the TCS, and spent over 42 hours underwater at depths of 586-1169 meters from the Oregon- California border to the Mendocino Ridge (...) This report provides a summary of the methods and results from these underwater surveys of DSC&S off northern California. This was a collaborative effort among investigators from NOAA National Marine Fisheries Service (Southwest Fisheries Science Center, Northwest Fisheries Science Center [NWFSC], Pacific Islands Fisheries Science Center [PIFSC], and Alaska Fisheries Science Center [AFSC]) and several universities including California State University (Humboldt State University and Moss Landing Marine Laboratories), University of California Santa Cruz, and Oregon State University"--Page 1. [doi:10.7289/V5/TM-SWFSC-556 (http://dx.doi.org/10.7289/V5/TM-SWFSC-556)]
Author: Kaitlin Graiff
Publisher:
ISBN:
Category : Deep sea corals
Languages : en
Pages : 21
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Book Description
"This report provides summary results from leg 2 (Central California) of the 2010 effort in which a Remotely Operated Vehicle (ROV) was deployed from the NOAA ship McArthur II to survey potential DSC habitat. The specific objectives of our research during Leg 2 were to: 1. Survey and characterize the distribution, abundance, and condition of DSC communities in and adjacent to Cordell Bank (CBNMS) and Gulf of the Farallones (GFNMS) National Marine Sanctuaries; 2. Quantify fish and invertebrate associations with DSC to help understand the value of DSC as habitat; 3. Collect limited DSC specimens to confirm taxonomic identification; 4. Make visual observations of sea floor substratum to refine habitat classifications derived from multibeam sonar data"--Page 2.
Author: Ed Bowlby
Publisher:
ISBN:
Category : Deep sea corals
Languages : en
Pages : 56
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Book Description
"Deep-sea corals (DSC), particularly structure forming corals, are biogenic habitats and are recognized as slow-growing, long-lived and fragile, making them and their associated organisms vulnerable to human-induced impacts, particularly from physical disturbances (NRC 2002; Hourigan et al. 2007; NOAA 2010). The extent of habitat degradation resulting from these threats is largely unknown although there is increasing information on significant impacts in some areas. Activities that can directly impact deep coral communities include fishing using bottom-tending fishing gear, deep coral harvesting, oil and gas and mineral exploration and production, and submarine cable/pipeline deployment. Invasive species, climate change and ocean acidification represent additional serious threats"--Page 1.
Author: Kaitlin Graiff
Publisher:
ISBN:
Category : Coral communities
Languages : en
Pages : 42
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Book Description
Author: Peter J. Etnoyer
Publisher:
ISBN:
Category : Benthos
Languages : en
Pages : 32
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Book Description
"The purpose of the surveys was to groundtruth mapping data collected in 2011, and to characterize the seafloor biota, particularly corals and sponges, in order to support Essential Fish Habitat designations under Magnuson-Stevens Act (MSA) and other conservation and management goals under the National Marine Sanctuaries Act ( NMSA). ROV transects of uniform speed and distance (120 meters) were conducted over substrate classes predicted by ruggedness (Sappington et al . 2007) and backscatter intensity from the multibeam echosounder mapping data (Cochrane 2008). The three classes were low/soft, low/hard, and high/hard. The classes are reported here as sediment, mixed, and hard. Transects allowed quantification of organism abundance and density from oblique and down-looking video and still cameras mounted on the ROV. Sessile invertebrates 10 cm or larger were counted"--Page 1.
Author: Santiago Herrera
Publisher: Frontiers Media SA
ISBN: 2889760693
Category : Science
Languages : en
Pages : 336
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Book Description
Author: Kaitlin Graiff
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Robert P. Stone
Publisher:
ISBN:
Category : Deep sea corals
Languages : en
Pages : 60
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Book Description
Author: Malcolm R. Clark
Publisher: UNEP/Earthprint
ISBN: 9789280727784
Category : Corals
Languages : en
Pages : 86
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Book Description
Author: Mary M. Yoklavich
Publisher:
ISBN:
Category : Deep sea corals
Languages : en
Pages : 63
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Book Description
"The specific objectives of our research during Leg 3 were to: 1. collect baseline data on abundance, size, condition, and distribution of DSC on the Piggy Bank seamount; 2. quantify fish and invertebrate associations with DSC to help understand the value of DSC as habitat; 3. document environmental conditions of DSC habitats, including depth, sea floor substratum types, and seawater temperature, salinity, pH, and dissolved oxygen to help understand habitat factors that influence DSC distribution; and 4. collect specimens of DSC and associated organisms for confirmation of taxonomic identifications and for genetic, reproductive, and stable isotope analyses"--Page 2.
