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Sperm whales are amazing in so many ways. They are very powerful and feed at depths on squid that can be as large as they are. Yet, they appear so docile, trusting and friendly around divers.
In fact, the only way to get near them is by freediving. This is because they tend to flee the noises generated by scuba equipment as well as subs and robots.
Sperm whales are also extremely loud. They are known to be the loudest animal on the planet. Divers described their sounds to be flesh penetrating.
A sperm whale’s clicks are powerful enough for them to communicate with other sperm whales thousands of miles away. They are also powerful enough to easily blow out a divers eardrums or vibrate a diver to death.
In fact, as explained in the video below, divers have been known to report the side effects of these powerful clicks. The include partial paralysis as well as general body heating.
Watch the clip below. James Nestor explains provides more details as well as a video demonstration of these powerful clicks.
While normal human speech takes place between 60 and 65 decibels (dB), sperm whale clicks, described as such because we hear them as “tak-tak-tak”, can reach as high as 235dB. In contrast, a loud rock concert is around 115dB and the sound of a jet engine is roughly 140dB. Quite simply, sperm whales are the loudest animals on the planet.
Such is the power of their clicks that whales can comfortably transmit information to others from hundreds of miles away, and even across vast oceans. A sound of 180dB is enough to cause drastic cell death in your ears, but the most powerful sperm whale clicks will not merely deafen you: they can vibrate the fragile human body to pieces.
The following clip explains in detail how sperm whales generate those penetrating clicks.
As explained in the video above, divers also express a certain connection to these whales. This connection is described as totally different than with any other animals.
Read more about the experiences and discoveries of a group of sperm whale researchers in what’s called project DareWin in the following article here on bbc.com .
A freediving experience with Sperm Whales
“They don’t swim away, and they don’t attack. They become curious. Often, they welcome us into their pods and send us communication clicks. They are, in essence, reaching out to us.” H/T The Long Now Foundation
The following video explains the sleeping habits of Sperm Whales
Images Source: YouTube Clips1 , 2 , 3
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1 Marine Mammal Institute, Hatfield Marine Science Center, Oregon State University Newport OR USA.
2 Departamento de Ciencias Marinas y Costeras Universidad Autónoma de Baja California Sur La Paz Baja California Sur México.
Ladd Irvine et al.
Ecol Evol .
2017 .
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1 Marine Mammal Institute, Hatfield Marine Science Center, Oregon State University Newport OR USA.
2 Departamento de Ciencias Marinas y Costeras Universidad Autónoma de Baja California Sur La Paz Baja California Sur México.
Fastloc GPS locations recorded for sperm whales tracked with Advanced Dive Behavior tags in the central Gulf of California in March–April 2007 ( n = 13, left) and April & June 2008 ( n = 13, right. Note: it does not include Tag # 4700827, which did not provide any locations). Tags were deployed within the black rectangle, in the vicinity of Isla San Pedro Mártir
The distributions of 12 variables used in a hierarchical cluster analysis to categorize sperm whale dives after having been transformed as described in Table 1. Univariate kernel density distributions of each variable are shown in red on the diagonal. The correlation matrix is displayed above the diagonal, and the hexagonal binned plots below the diagonal represent the density of points in a scatter plot comparing the two listed variables. Lighter colors represent a higher density of points (range 1–269), and the results were log‐transformed to better visualize density differences. For better visualization, the variables were separated into two plots of six variables each, with depth and duration variables in one plot and the rest of the variables in the other
A 17‐hr portion of dive profile from Advanced Dive Behavior Tag # 4810843 attached to a sperm whale in the Gulf of California in June 2008 (black line). The gray polygon shows the depth of the seafloor (from SRTM ) nearest to the Fastloc GPS location collected by the tag after the whale surfaced from the dives. The dive profile appears to show the whale following the contour of the bottom during 17 consecutive deep dives
A 24‐hr portion of a sperm whale depth profile (Advanced Dive Behavior Tag # 4810843) from 7 to 8 July 2008 with dives colored to correspond to the type identified by the cluster analysis. The seafloor depth (from SRTM ) nearest to each dive location is represented by gray polygon
Density of occurrence for each of six dive types derived from recovered Advanced Dive Behavior tags deployed on sperm whales in the Gulf of California during spring 2007 and 2008. A 5‐km grid was used, and lighter colors represent a higher density of dives in that cell (range 1–38). Results were log‐transformed to better visualize spatial variability of dive density
A 2.5‐day portion of Fastloc GPS tracks for three sperm whales tagged with Advanced Dive Behavior tags on the same day (27 March 2007) moving in close proximity to each other (Upper panel). Dive profiles from the same three whales while they were moving in close proximity, showing asynchronous diving behavior in both time and depth (Lower Panel). Dive profiles are from the area highlighted by the red box in the upper panel, corresponding to the time period 09:00–18:00 GMT . The highlighted area was chosen due to the cluster of locations, which would suggest the whales were most likely to be foraging. An approximately equal number of each dive type except Benthic ( n = 0) was recorded in the highlighted area for Tags 4400837 and 4405841, but no dives from tag 4405963 were recorded as Mid‐water or V‐shaped
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Here, we describe the diving behavior of sperm whales ( Physeter macrocephalus ) using the Advanced Dive Behavior (ADB) tag, which records depth data at 1-Hz resolution and GPS-quality locations for over 1 month, before releasing from the whale for recovery. A total of 27 ADB tags were deployed on sperm whales in the central Gulf of California, Mexico, during spring 2007 and 2008, of which 10 were recovered for data download. Tracking durations of all tags ranged from 0 to 34.5 days (median = 2.3 days), and 0.6 to 26.6 days (median = 5.0 days) for recovered tags. Recovered tags recorded a median of 50.8 GPS-quality locations and 42.6 dives per day. Dive summary metrics were generated for archived dives and were subsequently classified into six categories using hierarchical cluster analysis. A mean of 77% of archived dives per individual were one of four dive categories with median Maximum Dive Depth >290 m (V-shaped, Mid-water, Benthic, or Variable), likely associated with foraging. Median Maximum Dive Depth was <30 m for the other two categories (Short- and Long-duration shallow dives), likely representing socializing or resting behavior. Most tagged whales remained near the tagging area during the tracking period, but one moved north of Isla Tiburón, where it appeared to regularly dive to, and travel along the seafloor. Three whales were tagged on the same day in 2007 and subsequently traveled in close proximity (<1 km) for 2 days. During this period, the depth and timing of their dives were not coordinated, suggesting they were foraging on a vertically heterogeneous prey field. The multiweek dive records produced by ADB tags enabled us to generate a robust characterization of the diving behavior, activity budget, and individual variation for an important predator of the mesopelagos over temporal and spatial scales not previously possible.
Keywords:
archival whale tags; benthic diving; bio‐logging; dive classification; diving behavior; sperm whale.
Fastloc GPS locations recorded for…
Fastloc GPS locations recorded for sperm whales tracked with Advanced Dive Behavior tags…
The distributions of 12 variables used in a hierarchical cluster analysis to categorize…
A 17‐hr portion of dive profile from Advanced Dive Behavior Tag # 4810843…
A 24‐hr portion of a sperm whale depth profile (Advanced Dive Behavior Tag…
Density of occurrence for each of six dive types derived from recovered Advanced…
A 2.5‐day portion of Fastloc GPS tracks for three sperm whales tagged with…
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Swimming with sperm whales is a rare experience for sure, but diving though a pod of sleeping sperm whales is just off the charts.
Patrick Dykstra is not new to swimming with sperm whales. He has been doing it for about ten years. However, swimming with a pod of sleeping sperm whales is an extremely unique and rare experience. He describes it as a surreal and peaceful experience that left him awestruck.
Sperm whales have one of the shortest sleep-cycles known in mammals. They sleep in a vertical position for about 15 minutes at a time at a depth of about 30 ft.
Just watching them in their sleeping pattern is a very moving experience.
In the following clip Patrick explains how this took place and shares some awesome footage of the event.
Watch the video below: Its very informative and really captures the experience
This looks like an awesome experience. Actually, a bit eerie too.
Purchase your next dive trip from PADI Travel at our affiliate link below and receive a free $500 Hotel Discount Card that can be used worldwide for hotel stays , car rentals and excursions. --> http://forscubadivers.com/DivePadi
Your email address will not be published. Required fields are marked *
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