Johnson Mark P.

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Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal a Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-05-21T12:35:46Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Ascent from a "shallow" dive at 122 m. Clicks, buzzes and squeaks. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 90.72 m, Depth at end: 47.07 m, Start time in sec since tag on: 498, End time in sec since tag on 558
Mesoplodon densirostris El Hierro, Canary Islands, Spain 10/11/2003 Animal a Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2008-08-28T14:38:00Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

DTAG data from a tagged Blainville's beaked whale; depth (m) over time (s). Location: El Hierro, Canary Islands, Spain, Species: Mesoplodon densirostris (Blainville's Beaked Whale), Permit: Granted to ULL from the Canary Island Government (no permit number), Water Depth: 65m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/4/2003 Animal a Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-10-01T14:20:58Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 1642m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/18/2003 Animal b Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-14T14:29:42Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Recordings at the surface, whistles. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 1.22 m, Depth at end: 1.04 m, Start time in sec since tag on: 16385, End time in sec since tag on 16410
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/19/2003 Animal b Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-08-28T15:02:01Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 1261m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/3/2003 Animal c Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-05-25T17:23:57Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Clicks and long buzz during end of the discent to max depth and begin of the ascent phase of a 75m dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 35.50 m, Depth at end: 56.02 m, Start time in sec since tag on: 7471, End time in sec since tag on 7505
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal c Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-30T13:02:56Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Whistles, clicks and buzz during the ascent phase of a deep dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 484.77 m , Depth at end: 446.24 m, Start time in sec since tag on: 2506, End time in sec since tag on 2524
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/19/2003 Animal a Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-16T15:14:55Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Deep dive, clicks and buzz during the discent phase. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 571.01 m, Depth at end: 594.22 m, Start time in sec since tag on: 424, End time in sec since tag on 461
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal a Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-08-28T15:01:58Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 1371m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/19/2003 Animal a Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-08-28T15:01:59Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 2127m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/2/2003 Animal d Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-10-01T14:21:06Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 1073m
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/4/2003 Animal b Depth Profile

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2008-10-01T14:21:00Z) Johnson, Mark P. ; Aguilar De Soto, Natacha ; Woods Hole Oceanographic Institution ; University of La Laguna

Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Permit: Granted to University of La Laguna from the Canary Island Government (no permit number), Water Depth: 1642m
Clicking for calamari : toothed whales can echolocate squid Loligo pealeii

(Inter-Research, 2007-11-27) Madsen, Peter T. ; Wilson, M. ; Johnson, Mark P. ; Hanlon, Roger T. ; Bocconcelli, Alessandro ; Aguilar De Soto, Natacha ; Tyack, Peter L.

Squid play an important role in biomass turnover in marine ecosystems and constitute a food source for ~90% of all echolocating toothed whale species. Nonetheless, it has been hypothesized that the soft bodies of squid provide echoes too weak to be detected by toothed whale biosonars, and that only the few hard parts of the squid body may generate significant backscatter. We measured the acoustic backscatter from the common squid Loligo pealeii for signals similar to toothed whale echolocation clicks using an energy detector to mimic the mammalian auditory system. We show that the dorsal target strengths of L. pealeii with mantle lengths between 23 and 26 cm fall in the range from –38 to –44 dB, and that the pen, beak and lenses do not contribute significantly to the backscatter. Thus, the muscular mantle and fins of L. pealeii constitute a sufficient sonar target for individual biosonar detection by toothed whales at ranges between 25 and 325 m, depending on squid size, noise levels, click source levels, and orientation of the ensonified squid. While epipelagic squid must be fast and muscular to catch prey and avoid visual predators, it is hypothesized that some deep-water squid may have adopted passive acoustic crypsis, with a body of low muscle mass and low metabolism that will render them less conspicuous to echolocating predators.
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/4/2003 Animal c Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contacts: dtag@whoi.edu, cetaceos@ull.es, 2010-07-30T14:41:18Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Clicks and whistles during the ascent phase of a 765 m deep dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 404.52 m, Depth at end: 302.21 m, Start time in sec since tag on: 24044, End time in sec since tag on 24096
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 11/4/2003 Animal a Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-05-25T17:34:38Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Clicks and long buzz at max depth of a 1000 m deep dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 956.4 m, Depth at end: 997.5 m, Start time in sec since tag on: 4450, End time in sec since tag on 4478
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal d Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-30T13:12:16Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Clicks and buzzes during the discent phase of a shallow dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 69.04 m , Depth at end: 79.89 m, Start time in sec since tag on: 2628, End time in sec since tag on 2676
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal e Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-07-28T17:30:28Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Clicks and buzz during the discent phase of a deep dive. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 868.69 m, Depth at end: 887.84 m, Start time in sec since tag on: 4089, End time in sec since tag on 4105
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/18/2003 Animal a Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-14T14:16:41Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Shallow dive, whistles, squeeks and moan-like calls. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 20.34 m, Depth at end: 36.45 m, Start time in sec since tag on: 396, End time in sec since tag on 495
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/23/2003 Animal b Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-05-21T12:58:39Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Surface behavior, shallow dive at about 10 m. Whistles. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 7.96 m, Depth at end: 3.53 m, Start time in sec since tag on: 1118, End time in sec since tag on 1178
Globicephala melas/macrorhynchus Tenerife, Canary Islands, Spain 3/17/2003 Animal b Audio Recordings

(The DTAG Project, Woods Hole Oceanographic Institution and University of La Laguna. Contact: dtag@whoi.edu, cetaceos@ull.es, 2010-06-11T19:44:57Z) Aguilar De Soto, Natacha ; Johnson, Mark P. ; Woods Hole Oceanographic Institution ; University of La Laguna

Whistles. Permit: Granted to ULL from the Canary Island Government (no permit number), Sponsor: SERDP, Location: Tenerife, Canary Islands, Spain, Species: Globicephala melas/macrorhynchus (Pilot Whale), Depth at start: 38.46 m, Depth at end: 33.68 m, Start time in sec since tag on: 5326, End time in sec since tag on 5344

Johnson Mark P.

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