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Duncan Murrell - A Whale of a Time

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Duncan Murrell - A Whale of a Time

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  • This was an unforgettable wild encounter! The sea was very cold so I had to haul myself back into my kayak to warm up, with my legs dangling over the side and my flippers slapping the surface like a stranded fish. Moments later I was surprised to see another kayaker paddling towards me; It was an American called Corrie who told me that he had just made the long sea crossing from Isla San Jose. It was great to be joined by another kayaker and even greater when I discovered that he had a wetsuit! There was no holding back now so I returned to the underwater circus. I discovered that there was one juvenile sea lion that was bolder than the others. At first it was trying to bite my mask and then it was nipping my chest as if it was trying to suckle from me; I think that the black neoprene wetsuit had transformed me into a marine mammal! This apparent attempt at bonding with me was taken to the next level of hilarity when all of a sudden I was aware of its flippers being wrapped around my body from behind and then feeling the little clown clinging tightly to my back! I reached behind me to feel it and it was very smooth, soft and spongy, making it conform to the shape of my back like an orthopaedic back-support. I continued swimming along with this unexpected diving accessory still firmly clamped to my back like an air cylinder. It eventually released me and disappeared momentarily; then Corrie exclaimed, “look at your kayak!” and to my amazement I watched it hauling itself onto the back of my kayak! It promptly settled down for a snooze on the most comfortable and exclusive bed available. Corrie climbed into the cockpit of my kayak to take some photos of me with my new friend, or should I say foster child, as photographic evidence was surely required. Corrie tried to evict the stowaway with my paddle, but the little rascal nipped at it and promptly slid down inside the cockpit to confirm its status as a stowaway but it was eventually evicted after much protest.
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  • Dramatic declines in harbor seal numbers have been documented in Alaska, including a decline from approximately 11,000 seals to 1,000 seals during 1976-1988 on Tugidak Island near Kodiak – a site previously considered to host one of the largest concentrations of harbor seals in the world. That decline resulted in the listing of Alaskan harbor seals as a species of special concern by the Marine Mammal Commission. A 63% decline in harbor seal numbers also occurred in Prince William Sound during 1984-1997. Although seal numbers in the Kodiak area have been steadily increasing since the early 1990s and seal numbers in PWS began to stabilize and show signs of increase in 2002, both populations remain severely depressed compared to pre-decline population levels. Similarly, a greater than 65% decline in seal numbers has been documented in Glacier Bay since the early 1990s. Seals in Glacier Bay continue to decline at a precipitous rate despite conservation measures in place to control vessel traffic, commercial fishing, and subsistence harvest. The declines and lack of substantial recovery of some harbor seal populations in Alaska contrasts sharply with other parts of the world, where the species has proven to be resilient and capable of fairly rapid recovery from perturbations. There is no evidence that movements of seals between areas can explain these declines; the cause is unknown, but multiple factors are likely involved. Harbor seals appear to have responded severely to changes in carrying capacity and therefore may be particularly sensitive indicators of future change, such as ocean warming.
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  • This was the first time that I have ever seen this.
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  • In Alaska, single pups are born between May and mid-July. Young pups are able to swim almost immediately after birth. They normally remain with their mothers about one month, after which they are weaned and separate from their mother. At that time over half their body weight may consist of fat, providing them a head start on self-sufficiency.While harbor seals will often voluntarily swim close to humans on beaches or in small boats, seals resting on land or ice are wary of people and will rush into the water if approached too closely. If disturbed too often, seals have been known to abandon favorite haul-out sites or their pups. I was able to approach this sleeping seal pup close enough to touch it. They are usually much more alert than sea lions because there is less distracting noise and commotion. I have always been extremely careful not to disturb any of the animals that I have stalked.
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  • The most common predator of harbor seals is the killer whale. Other predators include sharks, sea lions, and land predators such as wolves, bears and coyotes. Since implementation of the Marine Mammal Protection Act in 1972, hunting has been restricted to Alaska Natives. Harbor seals play a crucial role in the culture and diet of Alaska Natives; the annual subsistence harvest of harbor seals in Alaska is about1,800 to 2,900 animals, with fewer seals harvested in recent years. The harbor seal's ability to damage or remove salmon from gillnets has caused conflicts between seals and commercial fishers in Alaska. This behavior creates economic losses for fishers and often fosters an antagonistic attitude toward seals. The Copper River Delta, the mouths of the Stikine and Taku rivers, and portions of Bristol Bay are areas with notable harbor seal-fishery conflicts. Sometimes seals are caught and killed or injured in fishing gear, primarily in gillnets and occasionally in crab pots.
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  • Juvenile whale shark (Rhincodon typus), with tour guides and tourist, Honda Bay, Palawan, the Philppines.
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  • Tourist following a juvenile whale shark (Rhincodon typus) with two common remora (Remora remora) attached to its head, Honda Bay, Palawan, the Philppines.
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  • Juvenile whale shark (Rhincodon typus), with tour guides and tourist, Honda Bay, Palawan, the Philppines.
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  • Juvenile whale shark (Rhincodon typus) swimming below snorkeller, Honda Bay, Palawan, the Philppines
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  • Steller sea lions are very vocal and a sea lion haulout is one of the most cacophonous “resting’ places you will encounter in the animal kingdom. They alternate between relative calm to absolute pandemonium if one sea lion decides to climb over its neighbour; the protest rapidly activates the entire mass of beached blubber. I often took advantage of the chaos by sneaking unnoticed amongst them and then remaining motionless to enjoy the entertainment at close quarters. I usually had to crawl through pools of stagnant water but I became accustomed to the sensory delights of an assembly of sea lions that assails just about every sense.<br />
Adult males establish territories and aggressively defend them. Steller sea lions gather on haulouts or rookeries, and regularly travel great distances (up to 250 miles) to find food. They can travel much further and juvenile sea lions have been known to travel over 1,000 miles. They are opportunistic feeders and eat a wide range of fish including herring, Pollock, salmon, cod and rockfish as well as squid and shrimp. I have even observed them catching seagulls on the surface. When males are defending their territories on the rookery, they may go without eating for over a month. On this individual you can clearly see the long, stiff whiskers that are used to navigate underwater and to assist in the location of their prey; Also the external ear flap, which points downward to prevent the entry of water when they are swimming.<br />
I witnessed many amusing incidents at the haulouts. The juvenile males could often be seen to be hanging around in “mischievous” gangs that delighted in antagonizing the pompous old bulls. On one occasion I witnessed some young bulls leaping out of the water to nip a large bull precariously perched on a narrow ledge above them. He was unable to defend himself and eventually he fell into the water with a resounding splash.
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  • Juvenile whale shark (Rhincodon typus), with tour guides and tourist, Honda Bay, Palawan, the Philppines.
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  • Harbor seals show variable movement patterns depending on their sex and age class, with some exhibiting considerable localized travel but noseasonalpatterns,whileothersshowmoreextendedmovements,particularlyduringthewinter. Seasonaluseofglacialfjords,wheremanyfemalesaggregateto give birth on icebergs in the summer, is common. Satellite tagging studies have shown that pups may range up to 232 miles (374 km) from their birth site, although most movements are less than 62 miles (100km) away. Juvenile seals can make more extensive movements of up to 186-310 miles (300-500 km) away from their tagging location; however, most remain within 100km. Adult seals typically make shorter movements and on average are within 37 miles (60km) of their tagging site. More recent tagging of seals that occupy glacial fiords has revealed movements of seals from one glacial fiord to another as well as one extensive movement of a juvenile female seal from Glacier Bay in southeastern Alaska to Prince William Sound, an estimated straight-line distance of ~ 520 miles (830 km). As more seals are being satellite-tagged, much more information is becoming available about winter and summer movements.
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  • Juvenile whale shark (Rhincodon typus) with common remora (Remora remora) attached and tourists, Honda Bay, Palawan, the Philppines
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  • Observing sea lions at close quarters at their haul-outs was like going to a circus, because there always so much going on to entertain and amuse. They are such noisy and smelly places, and sometimes I had to crawl through the foul, stagnant rockpools to get amongst them, but it was always worth it. There was often sparring going on between the big bulls, which involved a lot of heaving and wheezing, and roaring. If they weren't sparring then they would be posturing in  a high and mighty fashion with their heads thrown back and their chests puffed out. Younger bulls appeared to congregate in gangs like delinquents hell-bent on mischief, usually directed at the less mobile larger bulls. One of the funniest incidents I have ever seen in the animal kingdom was when there was a big bull teetering on a narrow ledge on a rock-face about 2 metres above the sea. Beneath him there were some mischievous juveniles that were leaping up at him out of the water to nip him on his exposed posterior that he was unable to protect because of his precarious situation. He was getting understandably very irritated, and eventually fell off the narrow ledge into the sea making a big splash: it was hilarious! I also enjoyed watching the juveniles playing in the tidal surges that swept them back and forth along channels between the rocks. Sometimes when I was paddling in big swells with waves crashing onto the rocks I marvelled at how the sea lions revelled in the opportunity to play close to the rocks in sea conditions that were threatening to me.
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  • It was amazing to get in the water with the sea lions and witness their graceful speed and agility. They were curious about me as soon as I appeared. This is a popular destination for swimming with sea lions so that are very habituated to the presence of people in the water with them. It was mostly younger juveniles that I could see, with the occasional large bull, which although large seemed quite small in comparison with the Steller sea lions in Alaska.
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