Showing posts with label fish. Show all posts
Showing posts with label fish. Show all posts

Thursday, 18 December 2008

Those Guides Who Manhandle Fish and why we should avoid them- Undercurrent, February 2008

Great story /article from the February, 2008 issue of Undercurrent

Undercurrent reader Don Wilson (Caldwell, NJ) was diving with a friend who owned a dive operation on Hawaii’s Kona coast, when the latter caught an octopus and held it. The hapless animal depleted its ink reserve. “When my friend finally released the octopus, it darted toward cover, but too late. A fish shot from the sidelines, grabbed the doomed octopus and hauled it away.”
Maybe it was the octopus’s destiny to become dinner for a fish, but it probably would have had a longer lifespan if a human hadn’t played such a part in its death. Wilson hollered at his friend, but what do the rest of us divers do when on trips with dive operators who have no qualms about handling marine life?
Obviously, divers want to dive with lots of fish and interesting marine life all around them. Knowing this, dive businesses do what they can to guarantee that happens, from offering shark feeds to holding creatures up close. They mean well, but they are also changing animals’ natural behavior, modifying their eating habits, and making them more fearful or more aggressive. Can dive operators and divers find a happy balance between seeing lots of fish and letting them be?
“Pretty Much Everyone Here Does It” 

It’s not an even balance in some popular dive destinations. In our travel story about San Pedro, Belize, in this issue, our writer described how divemasters from Amigos Del Mar grabbed nurse sharks to let divers rub their bellies, and pulled lobsters and crabs out from under rocks to let underwater photographers get better shots. Turns out they’re not the only one.s Many Undercurrent readers told us about similar experiences while diving with San Pedro dive operators, who seem to delight in manhandling critters. 
Subscriber Stu Mapes dived with the Ramon’s Village dive operation last fall and was appalled to see divemasters riding nurse sharks, chasing and sometimes catching sea turtles, picking up and passing around various creatures, and handling coral. “One of the first things stressed to me when I certified was to look, not touch, and I’ve found most divers follow that advice,” he says. “However, in Belize it seems to be the norm.”
“I’d rather photograph fish acting naturally instead of being held in someone’s hands.”
Rick Sutherland, the dive shop manager at Ramon’s, denies that happens and told Undercurrent that he tells divemasters not to touch anything. “I don’t want people doing that kind of thing in my home, so why should we do that in theirs?” He says Ramon’s is not an operation that throws out chum in the Blue Hole, and that boats only feed fish at two Ambergris Caye dive sites, Shark Ray Alley and Esmerelda.
Amigos Del Mar confesses to handling fish and feeding shark and grouper, and manager Gilmar Paz is very blasé about it. “I know it’s controversial for the environmentalists but most of our divers like it because the marine life comes to them.” He says Amigos Del Mar has no official fish-touching policy, nor is any mention made in dive briefing. “We leave it up to the divemasters to decide what to do, and we do tell divers that if they don’t like what’s happening, then tell us so. We try to please everyone. But pretty much every dive operator here does it.” 
He’s probably right, as Undercurrent readers wrote of similar experiences at Ambergris Divers and Patojo’s Dive Center. However, in our Belize story our writer gave Aqua Dives divemasters on the Blue Hole day trip thumbs up for not touching marine life.
“It’s Hard to Play Scuba Cop”
Subscriber Susan Goudge (Lake Zurich, IL) had an octopus experience similar to Don Brown’s while diving with Kauai’s Seasport Divers on a trip to Niihau. “Our divemaster Luke took an octopus from its crevice and held his hand up so that each time the octopus tried to escape, it swam into Luke’s palm. There was ink everywhere, and a great photo op of an octopus with tentacles extended, but it seemed more like a bully-in-theplayground situation.”
Seasport owner Marvin Otsuji told us he has heard that complaint often but says he can’t do much. “I can’t be there on a day-to-day basis. We don’t have an official policy about touching, but I do tell the crew to be 100 percent professional.” He says divers can sometimes be the problem as many are overeager and do similar grabs. “We try to say don’t touch as best we can, but we can’t constantly tell people not to without making them upset.”
It’s a copout for businesses to say they don’t have a policy and can’t control their employees. Having no policy about pulling critters from crevices means that it’s ok to do it. And it’s another copout to place blame on divers and make employees solely responsible when many are failing to set good examples of marine life interaction.
While diving with Cozumel’s Dive Paradise last spring, subscriber Deborah Brown was one of the few divers with a camera, so a divemaster decided to find her photo subjects. “He managed to find a splendid toadfish tucked under coral, as is customary. I was ecstatic because Cozumel is the only place to find it, so I quickly moved in to snap some shots.” But then the divemaster took a stick and started prodding at the fish, using his other hand to pull it from its hideout so Brown could get a better shot. “I was so irritated that he would go to such lengths that I quickly turned and swam away in hopes he would leave the fish alone. To me, no picture is worth harming the subject. I’d much rather have a shot of a fish acting naturally, even if that means I’ll only get to see part of its body, rather than being held captive in someone’s hands.”
When Undercurrent told Dive Paradise owner Renee Applegate about the incident, she was very upset. “He shouldn’t have done that, and all the divemasters here know they’re not supposed to do that. It’s in the briefing for divers. We dive in a marine park and the rules are supposed to be observed.”
“Anything you do to make a fish change direction is something you shouldn’t do.”
You can’t always blame the operator for the actions of one grabby divemaster or diver. But those who see harm being done should speak up and tell the manager who, at the least, should pull aside the offender for an explanation. Subscriber David DeBoer (Dallas, TX) took it further and left after two days of a scheduled dive week with Scuba Mex, south of Cancun. “Both owners and divemasters would bother anything to provide interest for the divers. The grabbing of pufferfish to induce defensive inflation was a favorite. Latching onto turtles and yanking lobsters out of crevices by their antennae were other specialties. It makes no difference whether it’s your neighbor’s cat or a marine invertebrate, it’s animal cruelty.” Scuba Mex did not reply to our calls or e-mails.
Marta Arensberg (Issaquah, WA) was diving last September on the Palau Aggressor when she noticed two divers taking underwater photos of a small turtle. They had pinned it against a wall, allowing it no escape. “They kept their lenses less than 18 inches from this little guy for over five minutes, so I motioned to one of the divemasters to stop them. He did nothing, just shrugged his shoulders at me.”
When Undercurrent asked Wayne Hasson, president of the Aggressor fleet, about that episode, he replied that there was nothing the divemaster could have done just then. “You can’t scold them in front of other people underwater. Who wants to create an embarrassing situation? It’s better to take them aside and say, ‘You’ve harassed turtles and upset divers; do it again and your diving privileges will be revoked.’”
Hasson says all Aggressor boat briefings state no touching, no feeding. “That doesn’t change the fact that people still do. Some can’t help themselves. What do you do?”
“There Is A Right Way to Touch Fish”

Many Undercurrent subscribers recommended dive operators who set good examples about not touching coral or disturbing animals. Susan Goudge says Smitty, formerly of Sea Eye Divers in Grand Turk who now has his own shop, keeps divers’ encounters with animals as natural as possible. David DeBoer applauded Saba’s Golden Rock Dive Center and Sea Saba for upholding the marine park’s strict rules. Scott Okhuysen (Stephenson, MI) says Crystal Clear Watersports in the Florida Keys continually stressed the importance of being only observers. “On one dive, it was reported that a diver caught a ride on a turtle. The divemaster very nicely asked this person, who admitted it. Then he not so nicely explained that if the diver did this again, he would never dive with the operation again.”
Many readers have raved about diving with Touch the Sea in Bonaire (www.touchthesea.com). Owner Dee Scarr takes four divers maximum, gives them 45-minute briefings and aims to get them close to anemones, octopuses and cleaner shrimp. Ed Stevens (Austin, TX) describes his memorable experience. “We entered the water a little before sunset under Town Pier and came across a shy octopus in her den. We sat on the bottom and waited quietly. Slowly, the octopus emerged from her cavern and approached me. I slowly put out my bare arm and the octopus, about three feet in diameter, gripped me and climbed up. Then came the unusual part -- instead of continuing her climb, she started to tug on my arm and swim back toward her den. I slowly moved with her, not imagining what she was up to. Dee wrote on her whiteboard, ‘She’s taking you home!’ This adorable octopus and I had to split up because I was running low on air. Did we do wrong by socializing with this wild creature? I certainly benefited. Did she?”
Yes, says Scarr. In her opinion, interacting can be done in ways that are educational and respect the animals. “The simplest way to look at it is the wording of the U.S. Marine Mammal Protection Act,” she says. “Anything you do that makes a fish turn the opposite direction is something you shouldn’t do.”
Even venomous animals can be approached in the right way. Scorpionfish lying on the sea floor raise a dorsal fin to show discomfort. Scarr tries to find one lying low in flat sand so she doesn’t approach it from above. “If it raises the dorsal fin, I back off. If it doesn’t, I position my four divers in positions so that they’re not making a semi-circle around it and the fish sees that if he wants to go, he can. You can’t pen in anything or it will feel uncomfortable.” Scarr reaches out a finger, then raises the dorsal fin a bit. If the scorpionfish hasn’t moved, she brings divers in one by one to pet it in the safe spot behind the fin. “The goal is to make the fish comfortable.”
It’s apparent that too many dive operators let their divemasters manhandle marine life. Some operators encourage it while others turn their backs. Their goal is to entertain their customers, regardless of the effect on the natural environment. In most cases, they are threatening the security of the animal, forcing it into a defensive mode. Dee Scarr’s approach is not only entertaining, it is also gentle and educational. Others should follow her lead. As it is now, reckless dive operators are another element in the destruction of our reefs and marine life. Divers ought to avoid them.
- - Vanessa Richardson

Next month, we’ll take a look at fish feeding and the diving industry’s overall stance on human interaction with marine life.
I want to get all the stories! Tell me how I can


Those Guides Who Manhandle Fish - Undercurrent, February 2008

Thursday, 14 February 2008

No sunglasses required for fish supper

Fishermen are always looking for a tasty catch - but it is the fish that have a natural advantage when it comes to spotting dinner, according to new research from The University of Manchester.

In a paper published this month in the Biophysical Journal, Dr Nicholas Roberts reports how individual light sensitive cells within the retina of goldfish are able to detect polarised light.

It's believed this type of polarisation vision improves visual contrast and can help an animal catch its prey more easily.

Researchers say this latest research is important because it is the first direct experimental evidence of a polarisation detection mechanism in any normal vertebrate eye.

Dr Roberts says: "Vision is the primary sense of many animals and the way they see their world is of fundamental importance to understanding aspects of their behaviour.

"Numerous animals have amazing visual abilities, which allow them to see the world in very different ways. One such ability is polarisation vision.

"Just as fishermen wear Polaroid sunglasses to help improve contrast, many different animals - including fish - have evolved to do the very same thing without the need of sunglasses. It is a surprisingly common ability throughout the animal kingdom."

Journal Reference: Biophys J. 2007 Nov 1;93(9):3241-8.

Photo Credit:US National Oceanic and Atmospheric Administration

Wednesday, 25 July 2007

Egypt Stops Reef Fish Exports

Egypt have cancelled a decree which allowed companies to collect reef fish and export them to Europe and other markets .

According to the Hurghada Environmental Protection and Conservation Association (HEPCA), the previous decision had a devastating effect on nature and on the coral reef condition in the whole area. HEPCA launched a huge campaign against this decision and lobbied with other agencies, enthusiastic individuals, and major media representatives.

As a result of the decision HEPCA have ceased legal actions against the Minister's old decree.

Further Reading: http://www.hepca.com/

Wednesday, 9 May 2007

Tags follow 'Nemo' fish to home



The remarkable homing instincts of some coral reef fish have been revealed.

A team tagged two species of reef fish larvae to see where the juveniles were going after spending weeks and even months maturing in open sea.

It found most of the orange clownfish - made famous by the Finding Nemo movie - and vagabond butterflyfish returned to the reef where they had first hatched.

Writing in the journal Science, the team said the discovery could have implications for marine protection.

"Marine fish lay very small eggs, and when they do, they are released into the water column," explained co-author Professor Geoff Jones from James Cook University in Queensland, Australia.

"They develop into a really tiny little larvae that we think drift around in the water currents, sometimes for months.

"The missing link in our understanding of coral reef fish has always been: where do the larvae go?"

Help from Mum

But until now, finding this out has been extremely tricky - attaching tags to miniscule larvae is not an easy task.

So the international team of researchers tackled the problem by getting the mother to help.

Satellite image of the Kimbe Island  (Science)
The study took place on a small reef in Kimbe Bay
They did this by collecting female coral reef fish from a small 0.3 sq km reef in Kimbe Bay, Papua New Guinea, and injecting them with a rare, stable barium isotope.

The females pass this isotope to their developing offspring where it accumulates in their bones, giving the baby fish unique chemical signatures.

A few weeks later, the team returned to the reef and collected young fish to test them to see if they carried the "tag".

"We found that 60% - well over half - were coming back to the small island reserve, which was an unexpected result," Professor Jones told the BBC.

Navigational feat

The scientists are uncertain how the vividly coloured orange clownfish and vagabond butterflyfish perform this feat but hope to find out with further research.

An adult butterflyfish (Science and R. Patzner)
"Perhaps they are somehow remaining in sensory contact with their home island and are able to maintain their position and not end up drifting too far away," said Professor Jones.

"Or maybe they are getting carried away, but they have a homing mechanism to swim back to their home reef."

Although the study was carried out on two species, Professor Jones believes the finding may apply to other coral reef fish too, and if this is the case, it could have consequences for marine conservation.

It shows that small no-take marine reserves are a good way to protect over-fished species, he said, because there should be enough juveniles returning to the area to sustain numbers over time.

Story from BBC NEWS:
http://news.bbc.co.uk/go/pr/fr/-/2/hi/science/nature/6623981.stm


Published: 2007/05/04 15:14:23 GMT

© BBC MMVII