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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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  • I became very familiar with the individual whales that made up the cooperative bubblenet feeding groups. I could identify them by their flukes, markings on their throats, barnacles and even sometimes by the sounds they made.<br />
I had known Dr Fred Sharpe of the Alaska Whale Foundation for many years during his research into the cooperative bubble net feeding strategies employed by the humpback whales of Southeast Alaska. He was particularly interested in the genetic relatedness of individual whales within and between cooperative pods, in addition to the local genetic sub-structuring of the population. He discovered that social foraging humpback whale pods possess a social complexity that is rarely observed in baleen whales. For example, individuals within these groups may develop long-term associations that may last for many years. There also appears to be a division of labour, with particular whales constantly leading the group, deploying the bubble nets, and producing the feeding calls. Furthermore, on each lunge, each whale in the group maintains the same position, indicating that this is an intrinsically choreographed feeding maneuver. My own personal observations with the same feeding groups over the course of the summer also bore this out. I observed how there were always core members of a group but other individual whales appeared to join them on a much more ad hoc basis before moving off again.<br />
He ascertained that it is only the more elusive, shoaling prey, such as Pacific herring, that require the same level of cooperative cohesiveness; easier prey such as krill do not require the same sophisticated feeding strategies as do shoaling fish.
    Alaska-humpbackwhale-bubblenet15.jpg
  • Lunge-feeding humpback whale (Megaptera novaeanglia), Chatham Strait, Southeast Alaska, USA.<br />
<br />
I became very familiar with the individual whales that made up the cooperative bubblenet feeding groups. I could identify them by their flukes, markings on their throats, barnacles and even sometimes by the sounds they made.<br />
I had known Dr Fred Sharpe of the Alaska Whale Foundation for many years during his research into the cooperative bubble net feeding strategies employed by the humpback whales of Southeast Alaska. He was particularly interested in the genetic relatedness of individual whales within and between cooperative pods, in addition to the local genetic sub-structuring of the population. He discovered that social foraging humpback whale pods possess a social complexity that is rarely observed in baleen whales. For example, individuals within these groups may develop long-term associations that may last for many years. There also appears to be a division of labour, with particular whales constantly leading the group, deploying the bubble nets, and producing the feeding calls. Furthermore, on each lunge, each whale in the group maintains the same position, indicating that this is an intrinsically choreographed feeding maneuver. My own personal observations with the same feeding groups over the course of the summer also bore this out. I observed how there were always core members of a group but other individual whales appeared to join them on a much more ad hoc basis before moving off again.<br />
He ascertained that it is only the more elusive, shoaling prey, such as Pacific herring, that require the same level of cooperative cohesiveness; easier prey such as krill do not require the same sophisticated feeding strategies as do shoaling fish.
    Humpback whales-4-2.tif
  • This was one of the most unusual pods of bubble net feeding whales because of the appearance of some of their flukes every time they lunged to the surface. The co-operative feeding groups that use bubble nets to catch herring are very cohesive teams of individuals that feed together every summer, and their herding and feeding manoeuvres are tightly choreographed for maximum efficiency. This is the only pod that I witnessed using their flukes in this manner as part of their strategy.
    Alaska-humpbackwhale-bubblenet24.jpg
  • This photo clearly illustrates how distended the whales’ throat becomes when they lunge to the surface. They can dislocate their jaws like a snake does, and when they first reach the surface their jaws are open almost a full 180 degrees and their throat-poach hangs from their lower jaw like the throat-pouch of a pelican. The colouration of the throats varies and it was another means of identifying individuals. The open ventral pleats of this one appear to be pink because of the lack of pigmentation revealing the blood-rich tissue beneath. They really are a curious sight when their throats are fully distended like that, and they reminded me of Jabba the Hutt from the Star Wars movies.<br />
The formation of this bubble net feeding group also shows how there is always at least one lead whale that surfaces vertically, while the rest appear in a more lateral position around it. The individual whales that are regular members of the feeding group always maintain the same position in the tightly choreographed arrangement during the feeding ascent.
    Alaska-humpbackwhale-bubblenet3.tif
  • Duncan Murrell photographing bubblenet feeding humpback whales from his Nautiraid folding kayak, Morris Reef, Point Hayes, Chatham Strait, Southeast Alaska, USA. Photo courtesy of Francois Gohier.<br />
<br />
This was another photo taken by Francois Gohier when we were both photographing bubblent feeding humpback whales on the Morris Reef, near Point Hayes. I was very familiar with the underwater topography around the Morris Reef and became very good at predicting the movement of the feeding whales along it as they herded the herring. The main problem there was the sea conditions because it is near the junction of Peril Strait and Chatham Strait, so there are usually very strong currents and any wind can exacerbate the conditions as well.
    Whaleman-10.tif
  • This was another photo taken by Francois Gohier when we were both photographing bubble net feeding humpback whales on the Morris Reef, near Point Hayes. I was very familiar with the underwater topography around the Morris Reef and became very good at predicting the movement of the feeding whales along it as they herded the herring. The main problem there was the sea conditions because it is near the junction of Peril Strait and Chatham Strait, so there are usually very strong currents and any wind can exacerbate the conditions as well.
    Alaska-camping-kayaking21.jpg
  • The seabirds were such an integral part of my experiences with bubble net feeding whales. They followed the feeding whales just as tirelessly as I did from dawn to dusk, and probably beyond. I sometimes relied on them as an early-warning system to indicate where the whales were going to be surfacing, although quiet a lot of times there were false alarms and sometimes there were two different "opinions' going in opposite directions. It wasn't so important to watch them if it was calm because I could usually see the circle of bubbles on the surface, and estimate where the middle of the bubble net was. It was then just a matter of trying to stay as close to the bubbles as possible to avoid the centre where they would be surfacing. But sometimes if the sea was a bit choppy it became a bit more ambiguous because I couldn't tell which way the circle was curving. The best indicators if ever they were around were the sea lions, that always knew exactly where the whales were underwater.
    Alaska-humpbackwhale-bubblenet4.jpg
  • Humpback whale (Megaptera novaeanglia) cooperative feeding using a bubble net, the Morris Reef, Chatham Strait, Southeast Alaska, USA.<br />
<br />
Here is one member of the “Fantastic Five”, as I dubbed them, feeding on the Morris Reef. It clearly illustrates the moment when the whale shuts its jaws very quickly and firmly, and any water contained is forcefully ejected out through the baleen plates, and any prey is trapped inside its mouth. Also clearly visible are the distinctive bumps or “tubercles” on the rostrum of a humpback whale that are found on no other species of whale. Each tubercle has a small hair or “vibrissae”, that probably act like whiskers as sensory organs for detecting their prey.
    Humpback whales-13-2.tif
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1824.jpg
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1822.jpg
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1821.jpg
  • Humpback whales (Megaptera novaeangliae) cooperative feeding using a bubble net, I You Seen Cove, Chatham Strait, Southeast Alaska, USA.
    Alaska-humpbackwhale-bubblenet30.jpg
  • Humpback whales (Megaptera novaeanglia) cooperative feeding using a bubble net, the Morris Reef, Chatham Strait, Southeast Alaska, USA.<br />
<br />
I remember this group of bubblenet feeders very distinctly because I had many close encounters with them on the Morris Reef. There was a core group of the usual 5 or 6 individual whales and they were creating a lot of bubble nets. On this occasion they were so close to me that I had to remove my headphones because the sound of their feeding call was so loud and piercing. It was a sound that became so familiar to me, and was so ingrained in my mind that it constantly haunted my thoughts. I would imagine that it has the same effect on their prey. <br />
The baleen plates of one of the whales are clearly visible, and the means by which the water is filtered through them retaining any prey in its mouth.
    Humpback whales-20.tif
  • Humpback whales (Megaptera novaeanglia) lunging during cooperative feeding using a bubble net, the Morris Reef, Chatham Strait, Southeast Alaska, USA.<br />
<br />
This was the same cooperative bubble net feeding group of 5 whales that frequented the Morris Reef and I had many close encounters with. This photo clearly illustrates the structure and function of the baleen plates hanging from the roof of the whales’ mouth; they are smooth on the outside and frayed and bristly on the inside, thus creating a dense mat of coarse hairs to prevent any prey from escaping. The clearly defined palette in the roof of the mouth is also visible as is the common, distinctive pink “moustache” marking on the snout.
    Humpback whales-18.tif
  • Humpback whales (Megaptera novaeanglia) cooperative feeding using a bubble net, Tenakee Inlet, Southeast Alaska, USA.<br />
<br />
This feeding group clearly illustrates a typical formation with one lead whale ascending vertically out of the water and the rest arranged laterally around it. Sometimes there was more than one lead whale, but quite often it was just one.
    Humpback whales-14.tif
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1829.jpg
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1828.jpg
  • Giant oceanic manta ray, Manta birostris, feeding near the surface, Honda Bay, Palawan, the Philippines, Sulu Sea Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1823.jpg
  • This feeding group clearly illustrates a typical formation with either one or two lead whales ascending vertically out of the water and the rest surfacing on their sides. Sometimes there was more than one lead whale, but quite often it was just one.
    Alaska-humpbackwhale-bubblenet19.jpg
  • This was the cooperative bubble net feeding group of 5 whales that regularly frequented the Morris Reef and I had many close encounters with. This photo clearly illustrates the structure and function of the baleen plates hanging from the roof of the whales’ mouth: they are smooth on the outside and frayed and bristly on the inside, thus creating a dense mat of coarse hairs to prevent any prey from escaping. The clearly defined palette in the roof of the mouth is also visible as is the common, distinctive pink “moustache” marking on the snout.
    Alaska-humpbackwhale-bubblenet12.jpg
  • Humpback whales (Megaptera novaeangliae) cooperative feeding using a bubble net, Morris Reef, Point Hayes, Chatham Strait, Southeast Alaska, USA.
    Alaska-humpbackwhale-bubblenet26.jpg
  • This photo shows how much the whales' jaws are distended when lunge feeding like this. A solitary Pacific herring (Clupea pallasii) can be seen in the middle as well as the bristles on the inside of the baleen plates.
    Alaska-humpbackwhale-bubblenet11.jpg
  • Sometimes the cooperative feeding group would surface unexpectedly. If the sea was calm and there were plenty of seabirds around to help me to track the whales then it was easier, but if it was more difficult to see the bubbles on the surface or there were distracting sounds of boat engines in the vicinity then anything could happen, and on this occasion the whales exploded out of the water right behind me and I barely had enough time to swivel around to take a photo.
    Alaska-humpbackwhale-bubblenet21.jpg
  • Here is one member of the “Fantastic Five”, as I dubbed them, feeding on the Morris Reef. It clearly illustrates the moment when the whale shuts its jaws very quickly and firmly, and any water contained is forcefully ejected out through the baleen plates, and any prey is trapped inside its mouth. Also clearly visible are the distinctive bumps or “tubercles” on the rostrum of a humpback whale that are found on no other species of whale. Each tubercle has a small hair or “vibrissae”, that probably act like whiskers as sensory organs for detecting their prey.
    Alaska-humpbackwhale-bubblenet10.jpg
  • This was the place where I observed and photographed their spectacular cooperative feeding using a bubble net the most. Their baleen plates can clearly be seen in this photo. They have about 330 pairs of dark gray baleen plates with coarse gray bristles on the inside hanging from the jaws. They are about 25 inches (0.6 m) long and 13.5 inches (34 cm) wide. They act as filters to trap their prey when they shut their mouths and expel the water.
    Alaska-humpbackwhale-bubblenet1.jpg
  • I was awestruck when I was close enough to watch one cruise past me just beneath the surface. My first impression was that I was looking at a very prehistoric creature that could have been swimming alongside aquatic dinosaurs. It was astonishing to watch how the appearance of their head changed so quickly and dramatically as soon as they opened their jaws to commence feeding on the plankton soup; I can best describe it as a large umbrella popping open. I wasn’t in a position to climb out of my kayak to swim with them so I had to attempt to photograph them from the surface. I had brought a Canon G5 compact camera with a wide-angle extension lens, inside an Ikelite housing to take underwater photos. I had to try to position myself directly in front of them but not obstructing their passage, but that was difficult to do because when they are feeding they don’t just swim in a straight line but more in circles. I had to be very patient to get some reasonably good shots, and of course I was only holding the camera and housing over the side so I had to anticipate and estimate when they were in the frame. It took quite a lot of trial and error before I was successful. The visibility was very low because the water was so thick with plankton, which attracted 3 or 3 sharks as far as I can remember. I was so transfixed by these amazing but strange looking creatures that I had to drag myself away from them because I still had a long paddle ahead of me to get to Mull and Lunga, but I was quite sure that it wasn’t my last encounter with basking sharks on the trip, and fortunately I was right about that. It has recently been confirmed by data collected by the Wildlife Trusts that the place where I had my first encounter with basking sharks, Gunna Sound, between Coll and Tiree is a hotspot for them with numbers up to 4 times higher than recorded elsewhere in the UK.
    Kayaking-West-Coast-Scotland12.jpg
  • Humpback whale (Megaptera novaeanglia) lunging during cooperative feeding using a bubble net, Tenakee Inlet, Southeast Alaska, USA.<br />
<br />
Sometimes the cooperative feeding group would surface unexpectedly. If the sea was calm and there were plenty of seabirds around to help me to track the whales then it was easier, but if it was more difficult to see the bubbles on the surface or there were distracting sounds of boat engines in the vicinity then anything could happen, and on this occasion the whales exploded out of the water right behind me and I barely had enough time to swivel around to take a photo.
    Humpback whales-5.tif
  • This was the photo that won the Mammal Behavior Category in the BBC Wildlife Photographer of the Year Competition in 2002. It wasn’t until after I attended the award ceremony at the Natural History Museum that I discovered that many of the judges were unhappy that it wasn’t awarded the title of the overall winner of the competition, and I subsequently discovered that that was the general public consensus as well. It was unfortunate that the controversy that surrounded the overall winner that year soured such a proud moment in my photographic career. I was contacted a few years later by the new head of the judging panel, Mark Carwardine, to ask for any guidelines for submitting a winning photo, because he felt that my photo was the best entry that year. C’est la vie !<br />
But the moment that can never be diminished or tainted was the moment that I captured the image. I was photographing a bubble net feeding group very near the community of Tenakee Springs, which can be seen to the left of the whale. They came up behind me and I can clearly remember zooming my lens back so that I could fit the entire throat of the whale into the photo, and fortunately I was just able to do that or else it might not have been a perfect award-winning photo.
    Alaska-humpbackwhale-bubblenet33.jpg
  • Humpback whale (Megaptera novaeanglia) lunging during cooperative feeding using a bubble net, Tenakee Inlet, Southeast Alaska, USA.<br />
<br />
This was the photo that won the Mammal Behavior Category in the BBC Wildlife Photographer of the Year Competition in 2002. It wasn’t until after I attended the award ceremony at the Natural History Museum that I discovered that many of the judges were unhappy that it wasn’t awarded the title of the overall winner of the competition, and I subsequently discovered that that was the general public consensus as well. It was unfortunate that the controversy that surrounded the overall winner that year soured such a proud moment in my photographic career. I was contacted a few years later by the new head of the judging panel, Mark Carwardine, to ask for any guidelines for submitting a winning photo, because he felt that my photo was the best entry that year. C’est la vie !<br />
But the moment that can never be diminished or tainted was the moment that I captured the image. I was photographing a bubble net feeding group very near the community of Tenakee Springs, which can be seen to the left of the whale. They came up behind me and I can clearly remember zooming my lens back so that I could fit the entire throat of the whale into the photo, and fortunately I was just able to do that or else it might not have been a perfect award-winning photo.
    Humpback whales.tif
  • This was a typical bubble net feeding group with a permanent core of six individuals, but the size of the group would sometimes expand to about ten with the arrival of “guests”.
    Alaska-humpbackwhale-bubblenet18.jpg
  • Humpback whale (Megaptera novaeanglia) lunging during cooperative feeding using a bubble net, the Morris Reef, Chatham Strait, Southeast Alaska, USA.<br />
<br />
The tightly packed baleen plates are clearly visible. They are smooth on the outside, and coarse and bristly on the inside.
    Humpback whales-19.tif
  • Humpback whales (Megaptera novaeanglia) cooperative feeding using a bubble net), Morris Reef, Point Hayes, Chatham Strait, Southeast Alaska, USA.<br />
<br />
This was my first successful entry in the BBC Wildlife Photographer of the Year Competition. I was Highly Commended for this photo of a lunge-feeding whale in the Endangered Species category in about 1994.
    Humpback whales-6.tif
  • Humpback whales (Megaptera novaeanglia) cooperative feeding using a bubble net, Tenakee Inlet, Southeast Alaska, USA.<br />
<br />
This photo illustrates the power of the whales when they surge to the surface. Their gaping jaws, scooping up hundreds of litres of sea water and fish, must exert a tremendous amount of drag. Some of the herring they were pursuing can be see flying through the air to escape their open mouths.
    Humpback whales-21.tif
  • Humpback whales (Megaptera novaeanglia) cooperative feeding using a bubble net, near Kupreanof Island, Stephen’s Passage, Southeast Alaska, USA.<br />
This photo was taken near the Tlingit town of Kake on Kupreanof Island and illustrates the problems of the practice of clear-cut logging that persisted during the 1980s and 90s when I was based in Southeast Alaska. The extent of clear-cutting was much worse around native communities because the Alaska Native Claims Settlement Act of 1971 (ANCSA) awarded approximately 148,500,000 acres (601,000 km2) of Federal land in Alaska to private native corporations which were created under ANCSA. Transference of public National Forest land to a privately owned corporation removes it from protection by Federal law and allows the owners to use the land in whatever way they see fit without regard to the effects of the use on surrounding lands and ecosystems. This fact has caused much controversy involving the business interests of Native Regional Corporations and the personal interests of local Natives and non-Native residents of Southeastern Alaska, such as subsistence hunting and tourism.
    Humpback whales-6-2.tif
  • From Ariganour I paddled south along the east coast of Coll passing the big open Crossapol Bay with extensive sandy beaches, and stopped to camp near Calgary Point and the small island of Gunna in the strait that divides Coll from the adjacent Isle of Tiree. It was another really beautiful location, and kayaking around to the west coast allowed me to experience the ocean swells and the feeling of open exposure to the North Atlantic. The next morning shortly after heading out for the long crossing to the south end of Mull and then Lunga, I had the encounter that I had been hoping for – basking sharks !! In the distance I could see their tall tail fins sweeping from side to side, and as I got closer, their unmistakeably comical bulbous snout ploughing across the surface above their massively inflated jaws while feeding on plankton. I was so excited, and full of eager anticipation to get close enough to see them underwater. It was one of those magical moments akin to when I had my first whale encounters in a kayak. I couldn’t wait!!
    Kayaking-West-Coast-Scotland11.jpg
  • Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1826.jpg
  • Whale shark (Rhincodon typus) feeding on plankton on the surface with tourists, Honda Bay, Palawan, the Philppines.
    whale-shark-people-palawan_MG_5210-E...jpg
  • Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1827.jpg
  • Oceanic manta ray ( Manta birostris ), Honda Bay, Palawan, the Philippines Oceanic manta ray (Manta birostris) barrel roll feeding. Honda Bay, Palawan
    _MG_1825.jpg
  • There is so much power when the whales explode to the surface when they are feeding cooperatively with bubble nets. I could almost feel the energy being transmitted through the air and water when they exploded to the surface like this.
    Alaska-humpbackwhale-bubblenet5.jpg
  • Small boy feeding the family dogs at Barangay Tagibinet, Puerto Princesa, Palawan, The Philippines.<br />
I stayed with this very friendly family while I was photographing Ugong Rock, a karst limestone pinnacle with cave passages leading to the summit. The city of Puerto Princesa has developed it as a new ecotourism destination. There is now a zipline connected to Ugong Rock.
    Philippines-children7.tif
  • Small boy feeding the family dogs at Barangay Tagibinet, Palawan, The Philippines.<br />
I stayed with this very friendly family while I was photographing Ugong Rock, a karst limestone pinnacle with cave passages leading to the summit. The city of Puerto Princesa has developed it as a new ecotourism destination. There is now a zipline connected to Ugong Rock.
    Philippines-children6.tif
  • Humpback whales generally have heavy encrustations of barnacles on their throats, pectoral fins and flukes. Whale barnacles are barnacles belonging to the family Coronulidae. Whale barnacles attach themselves to the bodies of baleen whales during the barnacles's free-swimming larval stage. Though often described as parasites, the relationship is an example of obligate commensalism, as the barnacles neither harm, nor benefit, their host. But they are parasitised by whale lice that are actually amphipods: tiny crustaceans that feed off dead skin and pieces of flesh from their host. In normal situations, population of these parasites seem to stay in check, thereby not hurting their large hosts. Cetacean cyamid species are specific to different species of cetaceans and the one that lives on humpbacks is Cyamus boopis.
    Alaska-humpbackwhale-bubblenet32.jpg
  • This was my first successful entry in the BBC Wildlife Photographer of the Year Competition. I was Highly Commended for this photo of a lunge-feeding whale in the endangered species category in about 1994.
    Alaska-humpbackwhale-bubblenet2.jpg
  • The west coast of Scotland is one of the best places in the world, along with my home region of the SW of England, for seeing basking sharks, the second largest fish in the world. They can grow up to 10m (33ft) long. They are an open water shark, but move closer to shore in summer to feed on the plankton bloom. They are usually solitary, but occasionally gather in aggregations of 100 or more where there are large concentrations of plankton, usually where there are tidal fronts where different water masses meet. They are filter feeders, and in 1 hour they can filter 1.5 million litres (330,000 gallons) of water through their gills. They are highly migratory, but long-distance tracking of individuals only began recently, and it is still unknown whether they migrate between lower and higher latitudes, or between deep and shallow water. Their livers contain a large proportion of oil typical of deepwater sharks, which may indicate that they spend some time in deep water. Very little is known about their breeding. They probably mature late and reproduce slowly, making them particularly vulnerable to overfishing, especially as fisheries catch more females than males. They were once fished commercially on a small scale around Scotland for their huge livers, which contain oils formerly used in various industries, with a peak recorded catch of 250 sharks in 1947. But in response to dwindling numbers the basking shark has been fully protected since 1998. <br />
Because they swim at the surface, these magnificent sharks are easily harmed, either deliberately or accidentally. Currently, potential threats include bycatch in fishing nets, and disturbance or impact by jet-skis, speedboats and other vessels. Globally its conservation status is currently listed as vulnerable.
    Kayaking-West-Coast-Scotland13.jpg
  • Alaska-humpbackwhale-bubblenet29.jpg
  • Alaska-humpbackwhale-bubblenet22.jpg
  • This photo illustrates the power of the whales when they surge to the surface. Their gaping jaws, scooping up hundreds of litres of sea water and fish, must exert a tremendous amount of drag. Some of the herring they were pursuing can be see flying through the air to escape their open mouths.
    Alaska-humpbackwhale-bubblenet20.jpg
  • This photo was taken near the Tlingit village of Kake on Kupreanof Island and illustrates the problems of the practice of clear-cut logging that persisted during the 1980s and 90s when I was based in Southeast Alaska. The extent of clear-cutting was much worse around native communities because the Alaska Native Claims Settlement Act of 1971 (ANCSA) awarded approximately 148,500,000 acres (601,000 km2) of Federal land in Alaska to private native corporations which were created under ANCSA. Transference of public National Forest land to a privately owned corporation removes it from protection by Federal law and allows the owners to use the land in whatever way they see fit without regard to the effects of the use on surrounding lands and ecosystems. This fact has caused much controversy involving the business interests of Native Regional Corporations and the personal interests of local Natives and non-Native residents of Southeastern Alaska, such as subsistence hunting and tourism.
    Alaska-humpbackwhale-bubblenet6.jpg
  • The tightly packed baleen plates are clearly visible. They are smooth on the outside, and coarse and bristly on the inside. They have a series of 270-400 fringed overlapping plates hanging from each side of the upper jaw, where teeth might otherwise be located.
    Alaska-humpbackwhale-bubblenet31.jpg
  • It seemed like there was an ever-increasing number of pleasure boats every year from the early days when sometimes I was blissfully alone with the whales all day. There was an increasing number of whale-watching boats as well as research boats; on one occasion i witnessed twenty different boats surrounding a pod of bubble netting whales. Most of the time the whales just continued their behaviour uninterrupted, but sometimes I witnessed them aborting their lunging and moving away to get away from a particularly noisy and intrusive boat, which included a research boat on one occasion.
    Alaska-humpbackwhale-bubblenet28.jpg
  • Alaska-humpbackwhale-bubblenet17.jpg
  • The left eye of the whale in the foreground is clearly visible and shut. The whales are lunging at such close proximity that they usually close their eyes to protect them from any damage, particularly from the flippers that are usually heavily encrusted with barnacles. Whales that are regular members of these teams of bubble net feeders are very distinctive because of all of the scratches inflicted on their bodies by barnacles.
    Alaska-humpbackwhale-bubblenet16.jpg
  • Alaska-humpbackwhale-bubblenet23.jpg
  • Alaska-humpbackwhale-bubblenet8.jpg
  • This photo was taken by one of the leading humpback whale researchers in Southeast Alaska at the time, Cynthia D’Vincent. She was actually working with a film crew at the time who were making an IMAX film. We had a lot of encounters during the filming and she pointed out that I was getting into "rather too many" of their shots, and politely asked me if I could try to avoid doing that. I was getting fed up with having to breathe in the exhaust fumes from their fast boats, whilst I was left rocking in their wake. I continued to work in my usual low impact fashion, but eventually they got all of the shots that they needed and I was thanked for obliging with her request, and I was rewarded with a bottle of wine. <br />
The unusual lighting, and atmospheric conditions at sunset, was a result of an extensive forest fire in the Yukon Territory hundreds of miles away to the northeast.
    Alaska-camping-kayaking26.jpg
  • whale-shark-Puerto-Princesa16.tif
  • Alaska-humpbackwhale-bubblenet14.jpg
  • This is just before its distended throat contracts and the water is forced through its baleen plates as seen in the next photo. Clearly visible are the distinctive bumps or “tubercles” on the rostrum of a humpback whale that are found on no other species of whale. Each tubercle has a small hair or “vibrissae”, that probably act like whiskers as sensory organs for detecting their prey.
    Alaska-humpbackwhale-bubblenet9.jpg
  • This is looking west towards the end of the inlet.
    Alaska-camping-kayaking25.jpg
  • whale-shark-Puerto-Princesa29.tif
  • whale-shark-Puerto-Princesa15.tif
  • whale-shark-Puerto-Princesa22.tif
  • Alaska-humpbackwhale-bubblenet27.jpg
  • Alaska-humpbackwhale-bubblenet13.jpg
  • Some of the herring they are catching are clearly visible above the lunging whales. This was taken during a period of clear weather when there was a forest fire hundreds of miles away in the Yukon Territory, which created the unusual lighting.
    Alaska-humpbackwhale-bubblenet25.jpg
  • This was the "Famous Five" group of bubble netters that I became so familiar with around the Morris Reef at Point Hayes. I became familiar with all of their physical differences like the colouration and markings under their throats. The one on the left was the most distinctive with its pink throat and the circular scars where barnacles had dropped off; it was always one of the lead whales that lunged vertically. Humpback whales are usually identified by the distinctive colouration, markings and scars on the ventral side of the flukes. I could also identify them by the distinctive sound of each blow: some are more explosive: some more guttural: some sound like a ricochet: some are more like sneezes.
    Alaska-humpbackwhale-bubblenet7.jpg
  • whale-shark-Puerto-Princesa13.tif
  • whale-shark-Puerto-Princesa4.tif
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Myanmar-Burma-people-events47.jpg
  • Philippines-children16.tif
  • whale-shark-Puerto-Princesa24.tif
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Borneo-GunungMulu-invertebrate18.tif
  • Philippines-children15.tif
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • whale-shark-Puerto-Princesa18.tif
  • whale-shark-Puerto-Princesa17.tif
  • whale-shark-Puerto-Princesa23.tif
  • whale-shark-Puerto-Princesa37.tif
  • whale-shark-Puerto-Princesa9.tif
  • whale-shark-Puerto-Princesa19.tif
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Borneo-GunungMulu-invertebrate17.tif
  • Palawan-invertebrates43.tif
  • Palawan-invertebrates44.tif
  • whale-shark-Puerto-Princesa21.tif
  • whale-shark-Puerto-Princesa20.tif
  • whale-shark-Puerto-Princesa10.tif
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Kayak-Madagascar-invertebrateNew-Mad...jpg
  • Myanmar-Burma-agriculture18.jpg
  • Philippines-children17.tif
  • KinabatanganRiver-11.tif
  • KinabatanganRiver-9.tif
  • Borneo-GunungMulu-invertebrate19.tif
  • KinabatanganRiver-8.tif
  • Palawan-invertebrates38.tif
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