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.

Monday, February 14, 2011

Mating Season



Even though there are still quite a few young pups sticking close to their protective moms, more and more females are coming into heat as their pups pass the three-week-old mark.

Many of these females are still displaying feisty behavior struggling to free themselves from ardent males by twisting and turning and even placing some good nips on the male's sensitive trunks or ripping at the cornified chest shields. ( The females seem to rule the roost ! )

Click here to see video of mating.

As this year's suckling phase nears its end, thinner than usual females seem impatient to quickly leave their fast maturing pups and head back out to sea to find some much needed nourishment to replenish their weight loss.

However, the male elephant seals, and there are an unsual amount of them this year, are insisting on trying to mate with as many of these obviously exhausted females before the 'gals' leave on their much-needed rejuvenation trip.

( Maybe because the weather has been unusally sunny and warm and the traditional foggy mornings and evenings absent, many of the elephant seals seem more drained than in other years.)

The BIG alpha males, the ones that won the hotly-contested territorial fights, are still jealously guarding their harems of females that are still ashore. Many of these large beachmaster males have intensified their determined dashing up and down the beaches over the past couple of weeks, as more and more uninvited amorous suitors keep trying to sneak ashore after playing the patient alligator in the shallow coastal water. Interestingly, the smarter alphas on the smaller beaches, can be seen exchanging the exhausting land patrol for the much easier and more efficient swim patrol in the shallow waters when the tidal water is high enough. Rocks that protrude above the surface of the shallow water are used to hide behind both by the protector and the intruders.

An amorous intruder might try to sneak quietly undetected by the alpha male up to a group of females, making himself as flat and unobstrusive as possible. To no avail. The females will soon make loud deep barking sounds to alert their protector, the big alpha male. This heavy-weight of all heavy-weights will then come rushing over to convince the uninvited suitor to remove himself. Sometimes, the suitor dashes off to another beach via the sea, or he'll just move off a little ways and wait for the opportunity to try again.

Some would-be suitors are not so subtle and attempt to physically challenge the resident head-honchos. This challenge usually ends very quickly with the wishful mater-to-be being chased off the beach with little or no physical contact.

Click here to see more photos.

Thursday, January 27, 2011

The Elephant Seal Mom


As soon as the pup is born, bonding takes place between mom and pup by each smelling the other, and in so doing, imprinting each other’s scent, the only sure way to ID one another in the melee of the elephant seal colony. ( The rather helpless newborn is completely dependent on its mom for survival.)

The immediate main mission of the mom for the following 28 days is to PROTECT her pup at all costs. To this end, she likes to keep a clear space around her and her not-too-swiftly moving pup to help in the defense against aggressive seals of either sex. ( To the eager onlooker, it appears as though the moms are continually bitching and then quickly turning to reassure themselves that their pup is OK.)

Click here to see video of bickering females.

If a prospective male suitor comes over to mate with an unready and unwilling mom, she tries to lure this ardent guy away from the vicinity of her pup by wiggling her tail-end and acting as though she wants to mate. Once lured over to her, the would-be-mate finds his advances are not welcome as the come-hither wiggling stops, sand is flung in his face, and he will probably also get some sharp nips from the protective mom before she hurries back to her pup.

Another problem the mom has to guard against is her dependent pup being run over by large males charging frantically across the beach trying to escape being attacked by other large males.

Click here to see video of male charging across crowded beach.

The icy tidal Pacific Ocean water is yet another danger to the newborn as too much cold water will chill the pup to the bone and can even lead to death.

Intruders on the birthing beach that the moms try to keep at bay, include raucous and bold gulls as well as the occasional coyote looking for a quick meal of tasty pup.

The other important side to being an elephant seal mom is to get the pup to suckle. If the hungry pup has problem locating the milk supply on the huge body of the female, the mom will use a fore-flipper to keep the pup from heading up towards her head instead of going down towards her tail end where her teats are.

Sound-wise moms and pups communicate almost constantly, but if a mom wants the pup to be quiet, she will even cover the pup’s head with her mouth.

The female emits distinctly different sounds for different situations. For example: the deep bark is a warning sound whereas a series of high-pitched almost staccato sounds indicate anxiety.

Click here to listen to an anxious female.

Click here to listen to female's warning bark.

For more photos, click here.