Monday, January 01, 2018
Saturday, March 15, 2014
One of the many joys of living on the Farallon Islands during the winter season is following the day to day lives of our northern elephant seals during their time hauled out. When I arrived midway through the season, things were in full swing and cows and pups already littered the beaches. It took me a little while to learn how to recognize individual cows and pups. One of my firsts and favorites was Morfydd, and now I will tell you the story of Morfydd and her weaner.
Morfydd arrived on the island on January 26th, my first full day here. Though she is named after a figure of Arthurian legend, Morfydd’s appears like an average cow. Her only unique physical feature is a small X shaped scar on her left side. We know that Morfydd pupped on SEFI the two previous seasons, but her past is otherwise a mystery.
Four days after making her way onto land, Morfydd gives birth to a pup on Omega Terrace. The birth is a loud and messy affair. As nearby cows come over to investigate the new arrival, gulls descend to fight over choice bits of placenta. Emerging tail first, the 60+ pound pup’s eyes open after a few moments.
|Mofydd with her newborn|
|Beatbox nearly crushing the new pup|
New pups face a number of dangers. Cows that lead their pups too close to the water’s edge can wash out to sea during storms. Two years ago Morfydd made this mistake and lost a pup to a storm on Mirounga Beach. There is also a serious risk of being trampled by bulls or cows on crowded beaches. Just hours after being born, the newborn narrowly escapes being trampled by this year’s dominant bull Beatbox.
|Morfydd's pup growing fat and happy|
A pup’s life essentially consists of nursing, sleeping, and bawling at intervals when hungry. Fed on a rich diet of 10-55% fatty milk, Morfydd’s pup grows fat and healthy. This growth comes at a heavy cost to Morfydd who will lose approximately 16 pounds per day during her fast on shore. By the end of the breeding season she will lose 30-40% of her body weight. Meanwhile her pup grows into a 200-300 pound monster.
After nursing for 24 days, Morfydd mates with the dominant bull Beatbox. Elephant seal reproduction involves a system called delayed implantation. Morfydd will conceive a new pup before heading back to sea, but her fetus will not begin to develop for several months. Gestation (fetal development) lasts about seven months, and delaying fetal development allows Morfydd to recover weight before she puts energy into the developing fetus. Delayed implantation also enables her to give birth at the same time each winter.
|Morfydd with Strahan|
The following day Morfydd attempts to leaves her pup and make her way to the ocean. Enroute she is intercepted by the Pete and Strahan, subdominant males hanging out in the outskirts of the harem, each intending to father the next generation. Without giving details, I’ll just say that procreation for elephant seals does not appear either sensual or consensual. For these males breeding opportunities are scarce. Unless they are able to ambush departing females or sneak into the harem without being discovered by dominant males, they will not have the opportunity to breed and propagate their genetics. Morfydd ended up returning to Sand Flat to avoid further harassment from the males lying between her and open water. Reunited with her pup, she spends a final night on SEFI.
|Three pups prior to falling into Breaker Cove|
On this same day, one of the hottest of the season, high temperatures, low wind, and the absence of puddles to soak within made the seals uncomfortable. We think that two cows may have weaned their pups a few days early just to escape the heat. Three other pups weaned themselves by falling into the cool water of Breaker Cove. Additionally, three weaners rolled into the cove. Breaker Cover is a big drop, but at least three of the youngsters swam to other beaches, and the others might be out there somewhere.
On the morning of February 25th, Morfydd abandons her pup and returns to the open ocean. Aged 26 days her youngster, who we now affectionately call a weaner, is on his own. A lucky few weaners may find an adoptive mother, or sneak some milk from unsuspecting cows, but the rest will rely on energy transferred from their mothers until they are able to forage for themselves.
|Morfydd's pup freshly weaned|
|Morfydd's weaner beginning to shed|
|Continuing to shed|
|Checking out his flippers|
|Snapdragon's happy looking weaner |
Watch the movie!!!!
Monday, March 10, 2014
Would you like to get involved with the Farallones and help support our conservation efforts? Well now's your chance!
Los Farallones proudly introduces Adopt an Auklet!
|Cassin's auklet chick about 10 days after hatching|
The seabird breeding season is about to get underway on the Farallones and we are asking for your help with supporting our long-term monitoring studies of Cassin's auklets. Regular readers of this blog know that Cassin's auklets are one of the 13 species of seabirds that breed on the Farallon Islands. They return every spring to lay their eggs in underground burrows, crevices and artificial nest boxes. Farallon biologists have been monitoring their survival, nesting phenology, breeding success and chick growth rates continuously since 1972. But we need your help!
|Typical Cassin's auklet nest box and auklets within|
By adopting an auklet for the season you help to protect the Farallon Island colony, increase and improve artificial nesting habitat, monitor birds at their nest throughout the breeding season and enable us to learn from Cassin’s about the health of our local marine ecosystem.
Watch the video for an introduction to the Adopt an Auklet program by Russ Bradley, Farallon Program Manager.
What do you get when you adopt?When you Adopt an Auklet, you are leasing a nest box on the Farallon Islands and adopting a Cassin’s auklet family for one year. For your donation, you will receive:
- a personalized adoption certificate
- a photo of your auklet nest box
- regular updates about Cassin's auklet activity on the Farallones throughout the seabird breeding season (March through August) from our Farallon biologists
- a personalized summary of what happened in your box at the end of the seabird breeding season including which birds breed there, when they were banded, how long they’ve been together in that nest, when they lay an egg, when the chick hatched and the ultimate fate of the chick.
All donations go directly towards helping to support our research efforts and to restore the Farallon Islands, for generations to come. For more information, go to the Point Blue website.
Thank you for helping to support our work on the Farallones. And auklets!