Monk Seals

Monk Seals
By Doug Schmid

Many of us feel a special connection with our marine mammal cousins and here at Midway we have been privileged to see the endangered Hawaiian Monk Seal (Monachus schauinslandi) daily. Starting on our first day here we have seen monk seals cruising along North Beach, hauled out on beaches, swimming by our kayaks, and under the pier at Eastern Island. One mother and pup have been frequently resting and rolling in the water among the metal debris the Navy left behind at a point called Rusty Bucket.

Wherever we have seen them, their liquid grace and smoothness of movement have stopped us in our tracks. Yesterday, some of us observed a mother and pup hauled out near the cargo pier when another adult attempted to approach. The mother's immediate sharp response, with a loud vocalization and lunge at the newcomer, seemed to us a strong example of a mother protecting her baby, something that touches us all.

This morning Brenda Becker, a NOAA researcher, and Mimi Olry, from the State of Hawaii Department of Natural Resources, shared their knowledge about these unique and charismatic animals with PAA. There are only an estimated 1,100 Hawaiian monk seals left in the world, with most of them living in the Northwestern Hawaiian Islands (Papahanaumokuakea Marine National Monument) and they are in trouble.

Brenda has been studying these animals since 1985, often at remote camps on French Frigate Shoals and other atolls. Between 1958 and 1976 their numbers decreased by 50 to 66%. They were listed under the Endangered Species Act and with that protection here at Papahanaumokuakea their numbers expanded. Unfortunately there has been asignificant decline since about 1998. The population is now declining at 4.5% a year and overall they have lost 70% of their population in the last 50 years. The problem seems to be one of lack of nutrition for the juvenile seals. They are underweight, not as robust and many starve and die before adulthood. Females are giving birth and are able to nurse their offspring, but after they are weaned, many of the young seals are not able to find enough food to survive to be the next generation's adults.

It is now believed that changing ocean currents are causing a decrease in productivity in this area and so there is less food for the monk seals. The adults may be skilled enough, experienced enough, to catch food with reduced prey populations. The juveniles on the other hand, just starting life on their own, without an abundant food supply to support their mistakes and early trials at catching their food, are in trouble. Emmaciated juveniles are increasing dying in the NWHI. French Frigate Shoals is also experiencing Galapagos shark attacks on monk seal pups. Since it may be only a few sharks killing pups, in this limited area, it may be possible to control the situation by carefully removing the individual sharks who have learned to "key in" on the vunerable young pups.

It is the ongoing research by NOAA, which looks to tag every individual seal, that has allowed this picture to emerge. The efforts of people like Brenda, living for months at a time in tents on the atolls of the NWHI, have allowed them to understand the lives of the seals. These are amazing animals, with the ability to hold oxygen in their muscles, to dive deep and see in the dark depths. They can move along the entire archipeligo, crossing the distances between the atolls and islands.

Our guest speakers also shared a video from the "crittercam" that was temporarily afixed to the back of one adult seal. This instrument recorded depth and showed the seal diving and filmed its foraging behavior. It was a real surprize to the researchers to see the seal passing by the shallow reef environment and spending its time deep- over 60 meters. Here it actually "rooted" around in the seabed, through sand and rubble, turning over rocks with its head and catching octopus, groundfish and eels. The large predator fish kept it company, perhaps looking to snatch up a meal from the seal's work.

Mimi handles coordianting monitoring efforts on the main Hawaiian Islands and shared some of the issues they face there. In an encouraging sign, the monk seal population is increasing in the main Hawaiian Islands. Over 20 pups were born last year. Although the good news is that seals are reproducing in ever greater numbers there, they are coming into contact with people, often with deadly results for the animals. Drowning in nets, getting hooked, being entangled in our garbage, lines or fish traps and being disturbed on beaches as they try to rest are problems. A pregnant female was recent shot. When a species is as endangered as the monk seals, every individual becomes even more precious and important to the chance the species has to continue to exist. After 15 million years of living on this earth, swimming these waters before the main islands were created, long before we came, they now are trying to hold on. I think we all were touched by Brenda and Mimi's knowledge, strong commitment and passion.

So the monk seals are coming to the main islands. Brenda called the islands the new "baskets of hope" for the species. We'll have to coexist, to make room for them on our beaches, and make changes to our behavior, like using new hooks. It's been said that in the end people will only save what they care about. Will we care and make room for these ancient animals?

Mimi's DNR group is always on the lookout for seals showing up on the main islands. They encourage anyone spotting a seal to call 220-7802 to share that information.