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« Turtle Tuesday #2: Basking
Field Report: September »

Monk Seal Monday #109: Weaner Update

October 5, 2020 by Kauai HMS Conservation Hui

In the good news department, all three of Kauai’s monk seal pups born this year are female. The more females in the population, the greater the potential for a boost in population numbers–super important with endangered species. Additionally, all three are no longer “pups” but “weaners,” as NOAA refers to Hawaiian monk seal pups after their mothers wean them.

The year’s first-born was PK1, born to RB00. PK1 nursed for 45 days. PK2, born to RH58, nursed for 39 days. And PK3, born to RK28, nursed for 40 days.

Due to COVID-19, none of the weaners have been flipper tagged. That also means none have been measured for girth and length. However, here’s an anecdotal assessment of their size: PK2 is fat. PK3 is fatter. PK1 is still the fattest, and she has actually slimmed down some since she was weaned in April.

Instead of flipper-tagging, the use of “bleach tags” will be used to identify the weaners. PK1 has been bleached V00. PK2 has been bleached V02. In the coming days, it’s hoped to bleach PK3 as V03.

As the oldest, V00 has already started moving around quite a bit these days–between the north and east sides of the island. V02 and V03 are still sticking close to their natal beaches; however, V03 has just started to explore a bit more in the past week. During this time, all three are learning how to feed themselves.

It’s not unusual for recently-weaned seals to approach other seals in the hopes of finding one with the milk-producing gifts that their mothers once provided them. Typically, this results in a scuffle between weaner and the second seal, sand and water flying. However, last week, when PK3 approached PK2, no scuffle ensued. No milk ensued, either. But, for about 30 minutes, PK2 showed extreme patience in allowing PK3 to nudge, push, and nip her in the hopes of a little nourishing milk. Here are some photos from that interaction.

PC: J. Thomton
PC: J. Thomton
PC: J. Thomton
PC: J. Thomton

The past several years, R400 birthed late in the summer along Na Pali coast; however, there have been no reports of her this year. Surprisingly she was sighted on Oahu for the first time ever this past July, and she did not look pregnant. So, maybe she’s taking a year off.

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