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false killer whale -- Pseudorca crassidens More
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Paul J Perkins
23 Mar 1978 at 15:10

    Geography
  • Mexico
    Latitude/Longitude
  • 20.6835   -105.61667
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • UHER 4200
    Microphones
  • Electro-Voice RE45N/D
    Accessories
    Equipment Note

NOTES: LNS notes: Some distortion due to overloading of hydrophone. 23Oct2003 SAS. Sound Recording Log: "Cut 1: time start 1508, time stop 1520; cut 2: time start 1536, time stop 1545. Cruise # SW1. Species: Pseudorca crassidens (false killer). Number: 75 +/- 25. est. range: along side boat. Movements: 200¡-250¡. Other species present: none seen. Weather: partly cloudy; 10-15knot winds. Sea state & noise level: 1-2. Recorder: Uher 4200, filters: 100 Hz conditioner, gain: varied throughout recording due to fast level changes. Hydrophone: CH-1. Any photos taken? Many; Tri-x and ectachrome. Other notes: Just 3/4 mi north of Las Tres Marietas, Bahia de Banderas. 1503, porpoise, Pseudorca, 1 mother-calf, lg. herd, about 50-60 maybe more, at least 6 with calves, wed. sized one, lg. ones. Saw 5 little blows [illegible] district up ahead. Took a recording; could hear them clearly thru [sic] hull and in air. 1528 - Moving up ahead of them to record and photograph. Several leaping into air now. Playing; can see blows some of the time. Recorded again. Maybe more with calves. One surfed briefly in wake. Bait; bill fish skimming on surface. Manta jumped. A group of 5 a little bit larger than calves moving together & leaping together (unison). One rolled over, one tail slapped. A lot with distinctive fin shapes and scars. Spread out over a half mile. 75 animals +/- 25." Reel notes: "Time 1510-1520, 1536-1545. False Killer whales CH1a 100~ conditioner on 257A Ithaca. 1 mile from Tres Marietas off Bahia de Banderas Mexico." SEAOCEAN

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