Mother-Calf Vocal Communication in Atlantic walrus (Igloolik, NU, Canada)

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Mother-Calf Vocal Communication in Atlantic walrus (Igloolik, NU, Canada)
Description:
Abstract:
Atlantic walrus Mothers and Calves' vocalisations were recorded in natural context in 2006 and 2008 in the Foxe Basin, Igloolik, Nunavut, Canada. In total, 544 barks from 22 calves and 164 barks from 11 females have been recorded and analysed. Further vocalisations produced by adults have also been recorded in different social contexts as well as some underwater vocalisations. In addition to these recordings, playback tests on females were performed to assess calf's vocal recognition, and propagation tests of calls over water and ice surface have been carried out to assess the efficiency of vocal communication in their natural environment. These data have been submitted to publication, the abstract is copied below: In all colonial pinnipeds studied, mother-young vocal recognition exists and allows rapid and reliable meetings in spite of the confusing environment of the breeding colony. The efficiency of this recognition process guarantees pup survival, especially in species where females alternate foraging sea trips and lactation periods on land. The Atlantic Walrus (Odobenus rosmarus rosmarus) is a highly gregarious pinniped with females attending their calves for an extended period of time (2-3 years). Although we expect mother-calf vocal recognition to occur in this species due to the high density of individuals packed in herds, it has never been experimentally demonstrated. Here, we assessed the individual stereotypy of both mother and calf barks recorded in the wild by measuring frequency and temporal acoustic parameters. Both discriminant function and artificial neural network analyses resulted in high correct classification rates, underlying a well-defined individual stereotypy in parameters related to frequency modulation and frequency values. Playback experiments showed that mothers were more responsive to the barks of their own calf than to those of unrelated young. Finally, propagation experiments revealed that barks propagate at greater distances over water surface than over ice, acoustic features such as frequency modulation and frequency spectrum being highly resistant to degradation during propagation. Thus, acoustic analysis and propagation experiments suggest that these frequency parameters might be the key acoustic features involved in the individual identification process. This experimental study clearly demonstrates that Atlantic walrus has developed a highly reliable mother-calf vocal communication allowing such strong social bond.
Purpose:
Not Available
Supplemental_Information:
Not Available
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20060530
Ending_Date: 20060702
Currentness_Reference:Unknown
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20080529
Ending_Date: 20080626
Currentness_Reference:Unknown
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.134
East_Bounding_Coordinate: -79.334
North_Bounding_Coordinate: 69.43
South_Bounding_Coordinate: 68.7862
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword: EARTH SCIENCE > AGRICULTURE > ANIMAL SCIENCE > ANIMAL ECOLOGY AND BEHAVIOR > ACOUSTIC COMMUNICATION
Theme_Keyword: EARTH SCIENCE > AGRICULTURE > ANIMAL SCIENCE > ANIMAL ECOLOGY AND BEHAVIOR > INDIVIDUAL RECOGNITION
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES > ATLANTIC WALRUS
Theme_Keyword: ZODIACS
Theme_Keyword: FIELD INVESTIGATION
Theme_Keyword: HYDROPHONES
Theme_Keyword: VCAW > VOCAL COMMUNICATION IN ATLANTIC WALRUS
Theme_Keyword: Atlantic Walrus
Theme_Keyword: Vocal Communication
Theme_Keyword: Individual Recognition
Theme_Keyword: Mother-calf Interactions
Theme_Keyword: BIOTA
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: OCEAN > ARCTIC OCEAN > FOXE BASIN
Place_Keyword: GEOGRAPHIC REGION > ARCTIC
Place_Keyword: GEOGRAPHIC REGION > POLAR
Place_Keyword: CONTINENT > NORTH AMERICA > CANADA > NUNAVUT > IGLOOLIK, 69.3762, -81.7995
Access_Constraints: Limited access to the recordings. Please contact the main investigator.
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ISABELLE CHARRIER
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NAMC - Université Paris Sud, Batîment 446
City: Orsay
Postal_Code: 91405
Country: France
Contact_Voice_Telephone: +33 1 69 15 68 26
Contact_Facsimile_Telephone: +33 1 69 15 77 26
Contact_Electronic_Mail_Address: isabelle.charrier@u-psud.fr
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Sound recordings and playback tests were all assessed in 2006. Vocalisations were recorded with the best signal-to-noise ratio, at a 44-kHz frequency sample, 16 bits, wav format. The same equipment has been used for all recordings (Sennheiser shotgun microphones & Marantz digital recorders; CRT hydrophone).
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: FR/CNRS-NAMC/UNIV PARIS11 > CNRS-NAMC/UNIV PARIS11>Laboratoire Neurobiologie de la Memoire, de l'Apprentissage et de la Communication, Bioacoustics Team
Contact_Person: ISABELLE CHARRIER
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NAMC - Université Paris Sud, Batîment 446
City: Orsay
Postal_Code: 91405
Country: France
Contact_Voice_Telephone: +33 1 69 15 68 26
Contact_Facsimile_Telephone: +33 1 69 15 77 26
Contact_Electronic_Mail_Address: isabelle.charrier@u-psud.fr
Resource_Description: sound files
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Not Available
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.cb.u-psud.fr/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20091103
Metadata_Review_Date: 20120126
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ISABELLE CHARRIER
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: NAMC - Université Paris Sud, Batîment 446
City: Orsay
Postal_Code: 91405
Country: France
Contact_Voice_Telephone: +33 1 69 15 68 26
Contact_Facsimile_Telephone: +33 1 69 15 77 26
Contact_Electronic_Mail_Address: isabelle.charrier@u-psud.fr
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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