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Posts Tagged ‘weaner’

As you may recall, the first Kauai pup was born on April 20, 2018 at Maha’ulepu to RK13. While this pup was with her mother she was known as PK1 (Pup Kauai #1), and then after 37 days of nursing, her mother weaned her, and we briefly captured and flipper tagged her. This process usually takes less than five minutes and includes a brief restraint while plastic flipper tags are applied in the webbing of the rear flippers. Her tags read K42 and K43, making her official ID RK42. The R indicates that she is part of the Main Hawaiian Island population and the K indicates she was born in 2018, and finally the 42 is her unique ID. During the tagging process her length and girth were also measured, a microchip was injected under her skin, and she was given her first vaccination against a virus in the measles family known as morbillivirus, also known as distemper in other species. You can learn more about this virus and the monk seal vaccination program here.

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As previously reported, RK42 became entangled in hook and line fishing gear on July 28th, which left a large fish hook in her mouth. The Kauai team quickly responded and captured her on the beach and removed the hook. The hook was a rather large barbed J-hook that was somewhat difficult to remove, primarily due to the sharp barb which caused some tissue damage in her mouth and mild bleeding. She spent the rest of that day resting normally at Maha’ulepu, but has not been seen since.

It is not uncommon for young seals to find a quiet out of the way places to haul-out, so we hope that is the case. In fact, it’s happened before. In June 2009, R5AY gave birth on a North Shore Kaua`i​ beach to a female pup who was eventually tagged RA20. After weaning, as RA20 started to explore, she all but disappeared. Time between sightings would stretch into months and years. Then, surprising everyone, she started popping up on Maui and Hawai`i Island beaches. In 2017, she gave birth to her first pup. Unfortunately, the pup did not survive. However, earlier this year, RA20 gave birth to a second, healthy pup.

As with most wildlife, surviving to adulthood is not easy. First year survival rates for monk seals in the Main Hawaiian islands is approximately 80%. The hooking was a very minor so we have little reason to believe it caused her longer term problems, but again young monk seals face many threats, both anthropogenic and natural. However, we are optimistic we will see her hauled out somewhere sometime soon in good health.

This is a good reminder to report all monk seal sightings on Kaua`i by calling our hotline–808-651-7668.

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A few weeks ago, we reported the gender of PK1 as male. Well, she fooled both volunteers and veteran monk seal biologists, because more recent photographs reveal that PK is not male. She’s female. That’s good news. It takes more females (than males; sorry guys) to grow the Hawaiian monk seal population. Here’s the photographic evidence.

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See the five dots in the shape reminiscent of the number five on a pair of dice? That’s the tell-tale sign.

In other pup news, we now have a “weaner.” After 37* days of care for her newborn, this pup’s mom, RK13, weaned her not-so-little one. This is normal monk seal biology. During the time from birth to weaning, monk seal moms do not forage. They stick by their pup’s side, nursing them and taking near-shore swims with them. Moms eventually lose half their body weight or more, and hunger drives them back to the sea for nourishment. This is how weaning occurs. Kauai’s first weaner of 2018 will now spend the next few months figuring out what’s good to eat in the sea. Weaners tend to stick around their natal birth site while doing this. Now is also a vulnerable time for new weaners, as they explore their surroundings, both near-shore and on the beach, making it as important as ever to give them wide space to do so safely–away from interactions with humans and dogs.

In the next few weeks, PK will be outfitted with flipper tags. Stay tuned. We’ll announce pup’s official tag numbers once she’s tagged.

Here are a few more photos of PK1’s last days with RK13. (Photo credit J. Thomton.) Note the molting on a couple closeups of the muzzle and tail flippers. You can also see in a few of these the size differential between mom and pup, indicating how much weight mom has lost and how much pup has gained.

 

*UPDATE: The official number of nursing days was changed from 41 to 37. It seems RK13 gradually weaned her pup. She first left her pup for a few hours on Friday and, again, on Saturday and Sunday. As of Sunday evening at sunset, the two had hauled out on the beach about 40 yards from each other. By the next morning, Monday, RK13 was gone. PK1’s first entire day alone was Memorial Day, May 28, 2018.

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RH92 (formerly known as PK2) has been busy. She now has a bleach mark of V92 that will make identifying her from a distance much easier. She’s also beginning to travel up and down the coast, going several miles one direction and equally far in the other direction. This makes her much harder for our volunteers to find! She’s been observed flipping rocks and checking things out just like a wild seal should. She’s also been observed with sea cucumber slime on her face. Not something that likely will continue as she discovers more deletable tidbits from the sea!

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