Feeding Ecology of the Arctic Ice-Amphipod Gammarus wilkitzkii. Physiological, Morphological and Ecological Studies, Svalbard September 2000

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Carolin E. Arndt
Publication_Date: 2002
Title: Feeding Ecology of the Arctic Ice-Amphipod Gammarus wilkitzkii. Physiological, Morphological and Ecological Studies, Svalbard September 2000
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name: Reports on Polar Research
Issue_Identification: 405
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage: http://ak.aoos.org/ArcOD/data_table.php
Description:
Abstract:
Gammarus wilkitzkii is a presumed omnivorous amphipod that lives in high densities in close association with Arctic pack ice. This dataset consist of 7 rows and 4 species (Apherusa glacialis, Gammarus wilkitzkii, Onisimus nanseni and Onisimus glacialis). The data are derived from a study that tried to illuminate the complexity of food ecology in more detail for G.wilkitzkii and in terms of food detection, food localization, food preference, feeding mechanism, ingestion and digestion. This study combines several experiments, in field and laboratory, with special emphasis on physiology, behaviour and morphology. Sampling took place in September 2000 in the pack-ice north of Svalbard. At three ice stations of each 24 hours duration eight traps baited with different food types were fixed at the ice edge and below the ice. The total number of amphipods caught at all locations was 15. Most of the specimens were attracted by those traps attached at the under-ice surface and baited with rotten polar cod. They belonged to the genera Onisimus. Even though abundance (and biomass) was recorded highest for G.wilkitzkii at all three stations this amphipod was only seldom attracted by baited traps. Compared to previous studies the density and biomass data at this sampling side was remarkably reduced, probably due to recent melting and re-freezing processesand the specific re-colonisation abilities of sympagic amphipods. Since bait experiments resulted in extremely low numbers of attracted amphipods food preference studies were carried out in the laboratory with specimens sampled by SCUBA divers. The most preferred food type was deduced from oxygen consumption rates after exposing the amphipod to homogenates made of plant, animal or detrital material. Fourteen adults (of both sexes) and thirteen juveniles were incubated in a closed bottle set-up for 18 hours. Some experimental set-ups with a wide spectrum of food types including conspecific living and dead amphipods revealed, that G. wilkitzkii rejected none of the food types primarily and ingested even foreign material of no nutritional value. Morphological studies on mouthparts and accessory feeding appendages by means of SEM confirm a more unspecific food ecology of G.wilkitzkii. Data come from a study that tries to investigate the feeding and digestion habits, preference, mechanisms, localization, and detection of Gammarus wilkitzkii.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20000922
Ending_Date: 20000925
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -15.1325
East_Bounding_Coordinate: -31.2968
North_Bounding_Coordinate: 81.3961
South_Bounding_Coordinate: 80.2356
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SEA ICE
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS > AMPHIPODS
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > USE/FEEDING HABITATS
Theme_Keyword: CORING DEVICES
Theme_Keyword: NETS
Theme_Keyword: OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM
Theme_Keyword: ARCOD > ARCTIC OCEAN BIODIVERSITY
Theme_Keyword: COML > CENSUS OF MARINE LIFE
Theme_Keyword: Gammarus Wilkitzkii
Theme_Keyword: Feeding Ecology
Theme_Keyword: Nansen Basin
Theme_Keyword: BIOTA
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > ARCTIC OCEAN
Place_Keyword: OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > SVALBARD AND JAN MAYEN
Place_Keyword: CONTINENT > EUROPE > NORTHERN EUROPE > SCANDINAVIA > NORWAY
Place_Keyword: GEOGRAPHIC REGION > ARCTIC
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: None
Use_Constraints:
Although these data have been processed successfully on a computer system at the University of Alaska and ArcOD, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from a University of Alaska server, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The University of Alaska shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: FALK HUETTMANN
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 419 Irving I, PO Box 757000
City: Fairbanks
State_or_Province: AK
Postal_Code: 99775-7000
Country: USA
Contact_Voice_Telephone: +01-907-4747882
Contact_Facsimile_Telephone: +01-907 4746967
Contact_Electronic_Mail_Address: fhuettmann@alaska.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
ATTRIBUTE ACCURACY REPORT: The animal counts were done according to convention (for details ask authors): sorting under a stereo microscope after preservations. Geographical positions were taken from the publication. Spatial accuracy is unknown. LOGICAL CONSISTENCY REPORT: The same procedures were used at all sites and for all species; findings should be consistent. COMPLETENESS REPORT: Core samples were 7.6 cm in diameter and the bottom 3+-1 cm. Only the bottom of the samples was used. PROCESS DESCRIPTION: applicable since fully explained in Methodology: see above PROCESS DESCRIPTION: Fixed collection code in meta data; changed capitalization of title of file; changed scientificnamauthour to scientificnameauthor [does not appear to be used anywhere.]
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: IOBIS > International Ocean Biogeographic Information System
Contact_Person: EDWARD VANDEN BERGHE
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Institute of Marine and Coastal Sciences
Address: Rutgers University
Address: 71 Dudley Road
City: New Brunswick
State_or_Province: NJ
Postal_Code: 08901-8521
Country: USA
Contact_Voice_Telephone: (732) 932-6555 x 565
Contact_Facsimile_Telephone: (732) 932-8578
Contact_Electronic_Mail_Address: evberghe@iobis.org
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: UAK-F/SFOS/AOOS > Alaska Ocean Observing System, School of Fisheries and Ocean Sciences, University of Alaska - Fairbanks
Contact_Person: ROB CERMAK
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Alaska Ocean Observing System
Address: School of Fisheries and Ocean Sciences
Address: University of Alaska Fairbanks
Address: PO Box 757200
City: Fairbanks
State_or_Province: AK
Postal_Code: 99775-7220
Country: USA
Contact_Voice_Telephone: (907) 474-7948
Contact_Electronic_Mail_Address: cermak@sfos.uaf.edu
Resource_Description: ArcOD_2008I1
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: XLS
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.iobis.org/
Access_Instructions:
DATA CENTER URL
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.aoos.org/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://ak.aoos.org/data/archive/2009/0000004/
Access_Instructions:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://ak.aoos.org/rest/metadata/ArcOD/2008I1
Access_Instructions:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.arcodiv.org/
Access_Instructions:
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20080111
Metadata_Review_Date: 20100224
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ALICIA ALEMAN
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Goddard Space Flight Center
Address: Code 610.2
City: Greenbelt
State_or_Province: MD
Postal_Code: 20771
Country: USA
Contact_Electronic_Mail_Address: alicia.m.aleman@nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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