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Archive for the ‘R3CX’ Category

Field Report: February Report

Monthly Update: The Kauai team logged 303 seal sightings this month. This included 30 individually identified seals.

Feb: 303
Jan: 284
Dec: 153
Nov: 145
Oct: 203
Sep: 199

New:

  • Adult female RB00 pupped at a remote beach on the North Shore. This is her natal beach, however she had previously pupped on Maui and Lanai, not Kauai. The pup is male and thriving.
  • Subadult female RH38 is currently molting and very thin. This seal was rehabbed at KKO in 2017 due to a heavy parasite burden and emaciated body condition. Currently we are closely monitoring the seal as her molt continues in hopes that she will gain weight as soon as the molt is complete. However, plans to send her to KKO for rehab are being discussed.

Updates:

  • RK58 was reared at Ke Kai Ola from August 4, 2018 until released on Feb 13, 2019 after a 3 day soft-release. This required building a beach pen to hold him, and for staff and volunteers to camp on site to monitor the captive seal prior to release. The seal has shown no signs of interest in humans, and is interacting normally with other seals in the area.
  • Poipu Keiki Pool: Two displacements of subadult male seals R3CX and RG58. occurred this month. This is the third displacement for each from the Keiki Pool.
  • Bleach markings: none
  • Molting: 1 seal molted this month.

Research/Support of PIFSC:

  • Sub-sampled scat, molt, and tissue plug samples accordingly.
  • Logged all seal sightings for PIFSC database. Organized photos and reported sightings, molt tallies, survival factors to send to PIFSC.

 

Here are some images (thanks G. Langley) taken during the past week of PK1. He continues to grow, marks six weeks of life today, and may become a “weaner” in the next few days.

 

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Monk Seal Monday #32: Molting

About the first of the month, two-year-old RH92 was reported to have started her annual molt. She joins four other seals known to have molted this year thus far: R1KT, R3CX, RG22, and V2.

lynn-nowatzki

Photo credit: Lynn Nowatzki

Hawaiian monk seals experience what’s called a “catastrophic molt,” meaning the loss of the top layer of skin and fur happens in one concentrated period of time, rather than continually throughout the year.¬†The molting process can take one to two weeks. Because molting requires great energetic resources, during this time, the seal will usually stick pretty close to the beach, often spending the night tucked high up the beach and under bushes.

Molting is a vulnerable time for monk seals, another reason to encourage folks to keep dogs on leashes. Typically, the molt starts on the belly, flippers, muzzle, and scars. Then, moves to the back. The molting pattern isn’t exactly “attractive.” A seal with patches of dead skin falling off can often cause beach-goers concern, thinking the seal is sick or, even, dead.

Adult females will often molt soon after they wean their pups. Also, any seals outfitted with a telemetry tag near its molt will lose it during the molt. (If you happen upon a telemetry tag on the beach–it’s a rare event but it has happened–please call the monk seal hotline to report it.)

T21M.Donna Lee

Photo credit: D. Lee

Basically, seals molt, because their coat gets dirty. After spending long bouts of time at sea, algae will often grow on their fur. If you see a seemingly green-colored seal, you’ll know he or she is nearing his/her molt.

After molting, monk seals regain their dark gray to brown color on their dorsal (back) side and a light gray to yellowish brown color on their under (ventral) side. This difference in coloration is known as “countershading.” From below, the seal’s light belly blends in with the sunny surface of the ocean. From above, the seal’s darker back is closer in color to the dark ocean floor. This serves as camouflage for seals. It helps them sneak up on prey, as well as, hide from sharks and other predators.

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