ML117898
Common Minke Whale Balaenoptera acutorostrata
Contributor
Date
Location
- Age
- Not specified
- Sex
- Not specified
- Playback
- Not specified
Media notes
NOTES: Notes on tape: "Time1000 Zulu." [MLNS notes: low level thumps throughout, with several louder trains interspersed.] Notes from analysis log: "Cassette number side up, rewind. Ambient sea noise low. Humpbacks: Neg.; Minke: Pos.; No. Heard: 1; No. Trains: 3. Need for further analysis: No. Notes: At 259 a strong thump train, again at 478, strong again at 678." [MLNS notes: digitized portion begins just before the first mentioned thump train (did not include first ~8 minutes without signal. 11Dec2003 CB.] [Notes from analysis log for all tapes in the GRANDTURKS series: "Six half-hour background recording samples on selected days for a period of 53 days... to detect the arrival and departure of the Humpback whales (via sounds) for the season in the Caribbean Sea, Mouchier, Navidad and Silver Banks...There are indications that recordings used a 420Hz Low Pass Filter. Recording equipment used was a Realistic model CTR-19. Cassette recorder operating on 110VAC, Freq 60-10,000Ha.. The Realistic recorder is poor recording frequencies below 60Hz as evidenced by spec sheet and sonograms. There is 120 & 180Hz electrical interference 'splatter' on some tapes. In certain cases when the ambient is low, the gain of the systems are raised hence we have heavy interference masking wanted signals. This could be caused by a fluorescent light fixture near the recording system? I doubt that it is in the hydrophone pre-amp network." See analysis log for more details.] SEAOCEAN. Other Behaviors: Thumps.
Technical information
- Recorder
- Microphone
- Accessories
Archival information
- Cataloged
- 11 Dec 2003 -
- Digitized
- 9 Dec 2003 -