Showing posts with label bottling. Show all posts
Showing posts with label bottling. Show all posts

Monday, June 11, 2012

Still Mainly Females



Even though June is underway, many of the continually bickering females are still present and are sticking firmly to our local beaches much like last year at this time.

Click here for female photos.

If you look carefully, you might notice that some of these females sport brightly colored red, yellow, or green tail-flipper tags from the Channel Islands further down the coast indicating that these specific females were tagged as weaners in that area. ( The white tags indicate they were tagged here at the Piedras Blancas colony. )

These pregnant adult females are apparently in no rush to leave for their next session of feeding. Instead, they're choosing to mingle and squabble within the shore-based feminine masses. Amongst these females, quite a few of them are displaying beginning signs of eye infections as well as other sores or infections.


Mouth Cyst on Female

Another interesting aside is that these females are occupying pocket beaches that in the birthing/mating season are traditionally taken over by the males.


Young Male Opponents

Click here to see young males in action on land and in the water.

The few younger males that have so far dared to venture to our shores at this time of year have basically two choices if they don't want to face these rather ferocious females. They can remain bottling off-shore or find small beaches that are unoccupied where they can go about their youthful male activities such as mock-fighting.

Click here to see video displaying fancy male moves along with a great variety of vocalizations.

Saturday, September 24, 2011

Versatile Fore-Flipper Action



When I first started reseaching the central coast elephant seals, I was told that they hardly use their fore-flippers at all. However, having observed, photographed and videotaped them for a few years, I find I have to disagree.

These human-like 'hands' are constantly in use both on shore and in the water. Some of their land uses include, the obvious scratching of various parts of their body...batting away an unwanted intruder....using the long nails as a sharp retaliatory weapon...clasping an antagonistic eseal in a hugging motion....helping haul the ungainly-on-land body across rocks and sand.

Then there's the water. Recently, I have been fortunate enough to witness and videotape how they use their fore-flippers in a rather human-like way as they bottle and twirl around in the coastal bays.

Bottling is where they seem to be floating vertically in the water but are actually arching their upper torso upright and backwards. They hold this position by moving their fore-flippers in a circular motion much as synchronized swimmers would do with their arms and hands to stay upright.

What is the purpose of bottling ? This arching of the upper torso in the water, which seems to only be carried out by male elephant seals, obviously helps them quickly discern who's approaching both above them on the beaches and the bluffs as well as in the water. Bottling seems to be the action of choice when the males of all ages first come to the coastal waters. After that it seems to be more of a sporadic event. Apart from finding out who their immediate compadres and competition are, maybe they're also preparing and strengthening their fore-flippers for the switchover to land movement. After all, for the huge adult males, hauling a couple of tons of blubber across land at the high speed of 10+ m.p.h. is no mean feat !

Watch this video as they use their fore-flippers in an almost human or dophin-like way in their aquatic maneuvers.

Click here for photos showing fore-flipper versatility.

Friday, June 24, 2011

Now for the Bigger Males


With the pregnant adult females apparently loathe to depart on their BIG summer foraging trip, many of the sub-adult male elephant seals have been reluctant to come ashore and get picked upon by these queens of the marine mammals. Instead, they have mainly chosen to stay just off-shore bottling and lazily swimming around in the shallow bays. The few males that did venture ashore tried to hide quietly amongst the restlessly quarreling moms without getting booted off again. ( Adult female elephant seals are infamous for picking on each other and keeping unwanted suitors/intruders from getting too chummy.)

Click here for photos of females.

However, as June draws to close for this year, and with these ruling females gone, the favoritized beaches are beginning to fill up with bigger males.

Click here for photos of sub-adult males and juveniles.

As we move through the summer months of July and August, we should see quite a few of the large male elephant seals taking up month-long residencies on the beaches of the central coast of California so they can go through their catastrophic molt and get some shore rest.

Click here to see video of adolescent males ganging up on an intruding male.

Currently, dominancy fighting is not at a premium as the newly arrived males are getting some R&R after their first long feeding trip of the year. But, as they recoup, no doubt their usual squabbling and hierarchal clashes will commence once again.

Click here for photos of bigger males.