Sunday, July 31, 2011

Dominance Fighting Is In




When the large male elephant seals started coming ashore in July, many were looking rather on the skinny side. Amazingly, and I say amazingly because scientists believe that elephant seals do NOT eat while they're visiting the beaches on the central coast of California, these giant marine mammals have made quite a noticeable weight gain ! They're now looking like you would expect them to, full of blubber and acting quite feisty once again.

With resting no longer being the most important activity some of the days, these heavy- weights are spending quite a bit of shore-time fighting whoever will accept the proffered challenges.

Throughout their lives, male elephant seals spend a good portion of their non-foraging time in determining who is stronger and more dominant by engaging in skirmishes with plenty of other elephant seals both in the shallows and on the beach.

Despite the obvious signs of mounting testosterone which is giving rise to quite a few fiercely combative skirmishes, many fights at this time of year are still quite lacksadaisical. Presently, the more serious fights are taking place in the shallows, while the disagreements on land usually arise when a male wants to change his position or location.

Click here to see current photos from Elephant Seal Land.

Some males do their best to avoid fighting altogether unless really pushed to the limit while others are constantly on the lookout for a good bruisin'. When observing these fights, it looks as though some males almost appear to be laughing as they face their opponents while others stare fiercely aggressively as they go on the attack. Still others look as though they're tolerating the inevitable. Interestingly enough, you can even witness occasional actual flashes of anger both in the behavior and in the eyes of some of these huge marine mammals as they go about deciding dominance.

The adult male elephant seals, however, usually only draw significant blood in the territorial fights that take place in December of each year. Fierce as those fights often are though, they do not fight to the death. Instead they either end with one of the combatants voluntarily backing away or being chased away by the victor.

Elephant seals have established their rituals for fighting which they follow pretty much every time there's a challenge. Click here to learn about the different steps.

Click here to see photos of male elephant seal aggression.

Click here to watch video of large male elephant seals battling in the shallows.

Click here to watch video of large males doing battle on the beach.

Thursday, July 14, 2011

Molting and Sparring Adult Male Elephant Seals


The hugely popular giant seafaring mammals, the adult male elephant seals, are once again coming to the local beaches on the central coast of California. Reaching 15 or so feet in length and weighing in the neighborhood of 3+ tons, they are convening here mainly to rest and molt, with the inevitable bouts of dominance sparring interrupting their noisy snores and snorts.

Click here to see video of these molting giants.

However, these giants of the sea do not seem as well-fed this year as the recently departed adult females. For many, their skin seems too big and wrinkled instead of being plumped out by several inches of insulating blubber. Since many appear to be on the skinnier side, they'll have to broaden their foraging hunt after completing their molting in order to be at full strength and weight for the intense fights for the rights to a piece of beach territory in December.

In contrast, some of the well-fed younger adult males can be seen eagerly sparring on land or in the water amongst these currently rather lethargic heavy-weight leviathans.

Here and there, an early-arrived yearling can already be spotted snoozing on the sandy beaches.

Click here to see plenty of photos of large males doing what they do best.

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.

Friday, May 13, 2011

Mostly Adult Females



Almost all of the favored elephant seal beaches are so packed with the big adult female elephant seals that it's hard to spot any sand. Most of these pregnant female seals have finished molting for this season but are still resting up on the beaches before heading back out to sea to feed.

There are still a few juveniles also hanging around, but all this year's weaners have finally left on their first BIG foraging voyage.

The next group to come in mass to molt will be the sub-adult males. With so many adult females still enjoying our coast, beach space will be at a premium as the guys start to come ashore in larger numbers. In fact, one can already see and hear a few of these young males both in the water and on land.

Click here for more photos. ( Because we've had so many unusually calm days, many of the photos show the elephant seals doing their thing under water for a change. )

Click here for video of females relaxing in the tidal surges.

Click here for video of young male having a relaxing time in a bay.

Click here to see video of young males trying to make decisions.

Friday, April 15, 2011

Molting Time for Females and Juveniles


The first group of elephant seals to return to the beaches on the central coast of California to start their molt are the adult females. Pregnant once more, and having regained their lost weight during the recent birthing/mating season, they have once again taken over their favorite beaches in order to rest and shed their old fur, which has become tan-colored over time. Some of these adult females are really huge...close to 10 feet in length and looking rotundly healthy after only having been absent for a month. It's hard to believe that they left about a month ago looking thin and worn out.

The catastrophic molt, as it's called, takes close to one month to complete. During this time the 'old' fur and attached skin comes off in large pieces so that the new sleek gray fur can be exposed and readied for 'duty'. During this changeover, the elephant seals seem more sensitive to heat than otherwise and can be seen lying either at the water's edge or swimming in the cool Pacific waters if the mercury starts to rise.

At this time, since there are no large males around, the adult females are the dominant ones on the beaches. Amongst these constantly bickering females, one can also see molting juveniles of both sexes and quite a few newly-arrived weaners that are beach-hopping their way to the hunting grounds.

One- and two-year-old elephant seals sometimes suffer from scabby molt, believed to be a skin disease rather than a true molt. ( Click here to read more. )

As April proceeds, sub-adult males will start to come ashore to start the molting period.

Click here for current photos.

Thursday, March 17, 2011

Weaners Galore


Since the threat of a far-reaching tsunami caused by the devastating 9.0 earthquake in Japan has finally dissipated, one would think that the elephant seals camped out on the shores of the central coast would continue their regular business.

Most of the current elephant seal population is composed of this year's pups, who recently matured into weaners. The majority of these have gathered together in oversized weaner pods on just a couple of the local beaches in the Piedras Blancas area instead of being dottted along the coast as in previous years.

An observer might be amazed as the members of the weaner pod at the north end of the Piedras Blancas viewing center seem to be unusually active, feisty and agitated - biting and snapping at anything and everything that's in their vicinity rather than mainly sleeping away their days, conserving energy. Extreme backbends also seem to be the order of the day as many of these maybe not-so-small twirling dervishes are making the most of a pool formed through a combination of high tides and water deposited from a large agricultural drainage pipe.

Click here to see video of weaners in pool.

Another interesting point is the amount of large adult male elephant seals that are still present. One could say that they're there to protect the weaners. But are they ? Scientists believe that the adult males are only interested in mature females. However, my observations of the adult males would seem to point to their protective nature not only towards females but also towards the pups and/or the weaners.

So far, only a handful of the females have returned to the beaches to rest and start their catastrophic molt. Additionally, on some of the small pocket beaches, a few well-fed young males have already hauled out to begin their molting period.

Click here to see more photos.

Friday, February 25, 2011

Pups Becoming Weaners



All but the last few exhausted mommy elephant seals have left to replenish their rapid weight loss which took place during their month-long shore sojurn. Giving birth and suckling their pups without possibility of leaving land for about 28 days to get some sustenance caused them to lose about 1/3 of the body weight they had when they first came ashore this winter.

The pups, most of whom are more than chubby this year, have been renamed weaners, weaned from suckling, and their only adult protection now is from some of the remaining large males.

Many of these weaners hang out in varying-sized groups known as weaner-pods. Whether they do so for safety in numbers, for comfort from physical closeness to others, for warmth, for the social aspect or what, the scientists are not sure. One thing is sure, though, their interactions with one another are often hilarious to watch.

Over the next month or so, the black/brown pup fur will be exchanged for the eye-catching silver gray fur that's specific for the weaners during their first year. Like all sea-going creatures, their new backside fur is darker than their belly fur, making them less visible to their predators in the ocean.

During their first month as weaners, they will start exploring the shallow tide-pools and/or creeks honing their vital foraging, swimming and diving skills. In so doing, they often get caught up in the ocean currents and land up, intentionally or otherwise, at a different beach, which I call this beach-hopping.

My next posting will deal with the adventures of maturing weaner.

Click here for more photos.