Showing posts with label List of Fish Species. Show all posts
Showing posts with label List of Fish Species. Show all posts

Sunday, May 25, 2008

Increasing Biodiversity

Sea fisheries are on the brink of collapse and oceanic Sharks face extinction - but there's a ray of hope, and that is the impact of Marine Protected Areas.

1. Experiments show that reducing the diversity of an ecosystem lowers the abundance of fish
2. Historical records show extensive loss of biodiversity along coasts since 1800, with the collapse of about 40% of species. About one-third of once viable coastal fisheries are now useless
3. Catch records from the open ocean show widespread decline of fisheries since 1950 with the rate of decline increasing. In 2003, 29% of fisheries were collapsed. Biodiverse regions' stocks fare better
4. Marine reserves and no-catch zones bring an average 23% improvement in biodiversity and an increase in fish stocks around the protected area


But the extent of protection is not the only issue, according to Carl Gustaf Lundin, head of the global marine program at IUCN, the World Conservation Union.

"The benefits of marine-protected areas are quite clear in a few cases; there's no doubt that protecting areas leads to a lot more fish and larger fish, and less vulnerability. But you also have to have good management of marine parks and good management of fisheries. Clearly, fishing should not wreck the ecosystem, bottom trawling being a good example of something which does wreck the ecosystem.This is a good compelling case; we should protect biodiversity, and it does pay off even in simple monetary terms through fisheries yield."

Case in Point: Shark Reef Marine Reserve.

The species count has increased dramatically from our baseline study in 2004 yielding 269 species, to January's count of 381.
And this isn't the end of the line, as according to the scientists, "further research is required at SRMR to fully assess the faunal diversity. The fish survey of SRMR is not yet at the point of diminishing returns. On their last dive the observers recorded 5 additional species.
The shallow reef habitat appeared healthier in 2008 than in 2004. Coral growth was prolific in areas previously barren. Easily observed species associated with coral, including the coral-feeding butterflyfishes Chaetodon trifascialis, C. ornatissimus, C. melannotus and C. lineolatus, were recorded in 2008, but not observed in 2004. A prolific and healthy reef supports more species. The health of the SRMR reef may be the result of four years of good stewardship.
Considering the constraints of observer time and survey methods utilized, the 381 fish species recorded during a brief window of time in a limited area is a impressive number and indicative of a rich and diverse fish fauna.
The shark population at SRMR would appear to be supported by a solid foundation at lower trophic levels."

The according increase in Shark numbers has been nothing short of miraculous.
When we started in 2004, seeing a dozen Bull Sharks on a single dive would have been exceptional. Now, we would be kind of disappointed if we didn't see double
that number.

We've now named and are keeping track of 35 individuals and on a recent dive in April, almost all of them turned up along with maybe a dozen more perfect, and thus "un-nameable" friends.
Yes, I'm talking 40+ Bull Sharks,
on a single dive and in perfect visibility!
What a sight! We all hung back in sheer disbelief and just enjoyed the show as even Rusi just couldn't keep up with the demand anymore.

And in the middle of the stampede, there comes Scarface - only to be taught that size matters, but numbers are better!

Normally, she would just glide in majestically, do a leisurely round to flaunt her importance and then proceed to dominate the hand feed as the Bulls beat a strategical retreat.

Not this time!

Every time she would try to approach, the Bulls would unceremoniously barge in ahead of her, or even physically push her out of the way.
Ever seen a flustered 5 meter Tiger Shark? Very funny indeed!
Finally, she decided to change gears, rush in for a fast nibble and get the hell outta there.

But no worries, she's been back since.
This is the time of the year when we welcome most of our VIP groups along with yet more film teams, researchers and photographers. The list would be too long to mention but Lawrence of Shark Diving International always gets to meet his favorite lady and this time has been no exception.
She's truly a poser and always knows when to make an appearance - this time alongside Brat, the Tiger named by Broadreach Academic Treks.

So, what are you waiting for?
Drop us a line and join us for the experience of a lifetime - and make a valuable contribution to Marine Conservation!



Friday, March 07, 2008

Ta da !!!


Great News!

It has taken weeks of cajoling and subservient supplication - but the Hawaii Dream Team have finally agreed to roll out the Results of last month's Fish Count. They however ask me to include the caveat that this is work in progress that may remain in a state of change.

I cite:
"But does one ever complete such a project? It is already ramifying into realms of possible new species description, biogeographical considerations, faunal and habitat changes over time, etc. (....)
Obviously further research is required at SRMR to fully assess the faunal diversity.
Considering the constraints of observer time and survey methods utilized, the 381 fish species recorded during a brief window of time in a limited area is an impressive number and indicative of a rich and diverse fish fauna.
The shark population at SRMR would appear to be supported by a solid foundation at lower trophic levels."

Besides featuring several Range Extensions and very possibly, some new Undescribed Species, the List is a treasure trove of supplemental information that can be accessed by clicking on the small links in the lower right corner of the pictures.
Having promised not to embarrass John with further accolades, I must however insist in commending Rob Whitton for setting up a phenomenal, instructive and user-friendly website - way, way better than we could have ever imagined or hoped for!
Whow!!!

We all are obviously incredibly proud and unendingly thankful.
Guys, from the bottom of our hearts, Vinaka Vakalevu!

Thursday, February 21, 2008

The Renaissance Man












Meet John Earle, Homo universalis extraordinaire!

How to describe the man?
For sure, a bonvivant and raconteur. A sportsman and adventurer. A brilliant analytical mind. A Philosopher. Meticulously attached to minutiae whilst never forgetting the Big Picture. Wits that always manage to crack me up. Husband to formidable (and obviously, endlessly tolerant) corporate lawyer Jackie. Father and, I think, grandfather (at which, having become biologically redundant, he had to devote himself to other worthwhile tasks).
Bachelors degree with honors from Princeton University. Ex Navy and airline pilot. One of the original Hawaiian surfing bums. Extreme climber. Accomplished fly fisherman. Dives since 1957 and once "cornered" the market for rare endemic Hawaiian shells, pocketing a small fortune in the process. Has three fish, two shells and one shrimp named in his honor.
Did I miss anything? Most probably!

Certainly once a reckless mad dog, John must have somewhat mellowed as time went by.
His latest, and passionate incarnation sees him as a Research Associate in Zoology at the Bishop Museum in Honolulu and fervent disciple of Prof. Dr. John E. "Jack" Randall, the unmatched guru and elder statesman of Fish Taxonomy, considered by many to be one of the more tedious disciplines of Ichtyology.

Did I say: "mellowed"? And: "tedious"?
With Jack having described every reef fish all the way down to the limits of certain death by DCS, John and fellow researcher, and desperado, Dr. Richard Pyle decided to strap on a couple of Cis-Lunar MK4 closed circuit rebreathers and headed straight down into the twilight zone.

Several near-death experiences and quasi fatal decompression accidents later, they are considered to be the pioneers of tech diving and deep water exploration. With every dive yielding one or more new species, they have thus positioned themselves smack at the very cutting edge of science.

I first met John in July 2002 when he and Jack joined Pelagian's infamous Voyage of Discovery from Kimbe Bay to Rabaul, PNG. The trip yielded Amblyeleotris neumanni, a pretty shrimp goby from remote Lolobau Island and my very own ticket to immortality.
Like most people touched by Jack, we became friends and have since tried to keep contact, not an easy feat considering his ever busy ichtyological schedule and my own erratic girovagations.

When we established Shark Reef Marine Reserve in 2004, John was gracious enough to fly in and conduct a first baseline fish count.
267 species in 7 dives represent a (and I cite) "high species count for a few dives in a limited area, especially considering that the presence of large sharks distracted somewhat from a focus on smaller fishes. The fauna of Shark Reef is exceptionally rich."
Ceci-dit, it was always obvious to me that the condition of Shark Reef was way below its true potential. The hard corals were just beginning to stage a tenuous comeback after the double whammy of the 2000 coral bleaching and tsunami; and the reef had been transformed into a garbage dump by the previous operator, thus tipping the balance in favor of predators, grazers and scavengers.

Four years later, the coral is thriving and we've substantially reduced the amount, and augmented the quality of introduced nutrients.
John enthusiastically offered to come document the changes to the ecosystem. Having achieved mental mastery over 5,000 fish species along with all of their distinguishing features, he's now a scientific silverback in his own right, all the way to turning up with a wise man's beard and his very own first disciple, Rob Whitton, a young, smart, promising computer whiz.

And boy, what a harvest this has been!
Preliminary findings point to a much more balanced ecosystem harboring over 370 species, and counting, among which such oddities as Cockatoo Waspfish and Longtail Ghostpipefish.

And there's more: at least 2 range extensions, among which the spectacular hovering shrimp goby Stonogobiops yasha.
Last time I saw one of those was in 2002 in Palau. At that time, I was still a photographer and my attempt of getting the ultimate picture of both gobies together with both shrimp, a blue-faced shot at 43m on Nitrox 32, earned me both 125% EAN and a permanent excommunication by my trusted Aladin Computer.
This time, yasha was peeking out from a hole in the midst of a colony of equally beautiful Yellownose Shrimp Gobies. Must be that the presence of large sharks had so far somewhat distracted me, too.

And, very possibly, Shark Reef might boast the presence of not one, but a whopping three species new to science!
Two shrimp gobies are "cf", i.e. comparable (yet clearly different) to known species, requiring DNA sampling. One, a dragonet, is obviously something brand new, triggering a Code Red Capture Alert from Jack in Hawaii.

Intrigued?
Click the pictures and judge for yourself!


All-in-all, very very cool indeed!

And, what next?
I cite John: "...........our return next year with collecting gear to capture these species and surely add more to the list. On our last dive I added 4 additional species to the list, so the well is not dry and the count could eventually exceed 400 species. This is astounding given that I have not used ichthyocides….yet. A little whiff of rotenone does work wonders in convincing recalcitrant Amblyeleotris to become scientific specimens."

Watch this space!

Wednesday, December 26, 2007

Thank you!


2007 has been Beqa Adventure Divers' most amazing year yet.

Despite the political upheavals and the discouraging -and unneccessary- travel advisory warnings and after a frightening dip in dive bookings in early January, the year started with a bang as we were named Fiji's Best Dive Operator, a wonderful surprise and a great honor. Like last year's glowing report by the Lonely Planet, the AON Awards are not based on often questionable self-promotion but are instead a true peer review by other local Tourism Operators.

On the Conservation front, we were finally able to expand the protected area of Shark Reef Marine Reserve by signing on yet another local community, the huge village of Deuba with their enormous fishing grounds. We've named the resulting 30-mile protected coastline the Fiji Shark Corridor and are very confident that it comprises most of the territories of our smaller Reef Sharks and Bull Sharks, but probably also those of our resident Tiger Sharks.

And, to my utter surprise and delight, we're likely to post our first ever small profit!
This despite having decided to secure our uncompromising quality standards by replacing our 3-year old engines and most of our dive gear, hiring a high-profile Dive Instructor and paying out a whopping 15 grand in bonuses to our loyal, incomparable BAD boys and girls.
Also, Village payments are likely to top $ 35,000.-, more than double last year's.

That all was only possible thanks to you, our loyal customers!
Along with scores of diving VIPs, more than 3,000 intrepid sharkaholics braved the doomsday scenarios and their very own personal Angst to pay a vist to our toothy friends and thus make a valuable contribution to Shark Conservation.
Thank you so much for that!

Many of you then took the time to post your experience on the web, often a funny and exhilarating read, let alone fabulous footage and photos.
Did I find a single complaint? Of course not!
Here's a small selection of what's out there, well worth having a peek at:

- Personal reports:
. Kevin Baldacchino
. Sam and Andy
. "Blue Legend"
. Tom Huck (......!)
. Darren Frost and Kerry Stephens
. "adiver69"
. Greg Davis
. Minna and Justin
. Michael Patrick O'Neill
. "Home or Away"
. Aidan and Danni
. Emma + Mark

- Group Reports:
. Shark Diving International
. Academic Treks

- Reviews:
. Dive Site Directory
. Dive the World

- Articles:
. Underwater Australasia
. XRay Magazine
. The Independent
. NZ Herald

- Research
. Brunnschweiler, Earle

- Images (just one of many many many....)
. Pterantula

I wish you a prosperous and adventure-filled 2008!

Friday, November 02, 2007

A Miracle, Culture Shock, Sex, Mayo, Midwest, Sailing and DEMA. And Jam!

First the Good News:
Manasa is making a miraculous comeback after a near-fatal Heart Seizure!

Expect Papa to be back on board shortly, where he will continue to entertain, frighten, amuse and intrigue you. As for being allowed to go back to his beloved Sharks, fingers crossed! Because that's where he belongs!

Our heartfelt thanks go to the Suva Private Hospital, Dr. Pawar and especially, Dr. Ian Linton who flew over from Oz to zap him back to life. And to all of you who were kind enough to send him your support and best wishes.
Vinaka Vakalevu, from the bottom of our hearts!

With Andrew over in Orlando for DEMA (Booth 2049 - and don't miss our brand-new spectacular edit at Gary Adkison's presentation!), the Staff are bravely manning the fort. The current Indians hail from frigid Moskow - talk about culture shock, both ways!
Будем!

When I rushed over at the beginning of October, I couldn't resist hopping in to check out who was still around.
The bulls were still plentiful but kind of standoffish and immagine my surprise to discover the first tell-tale cuts on Crook (click on image) and Granma who both turned up with male escorts!
According to our database, that would be at least one month early. After last year's mild El Nino, Fiji is experiencing a mild La Nina phenomenon and the water was warmer than expected. Are we maybe witnessing an early mating season? Does that mean that they'll be back early, too?
A Xmas running of the bulls?

In any event, we're ready.
Juerg is coming for a full three months in December to conduct an array of experiments and lectures; John Earle will do a new fish count; Gary and Brenda will host several film productions and generally be their usual combination of Wisdom, Chaos, Love, Testosterone and Midwestern Heritage - as in toasted Peanut Butter- Bacon- Lettuce- Mayo- Camembert sandwich with plenty of Ketchup! And Jam!

All-in-all, plenty of opportunities for everyone to learn heaps whilst having loads of fun! And for you image hunters out there: January and February are hot, I mean HOT, with heaps of action, warm water, often calm seas, sunshine and good viz. This is when the pros flock in to get the killer shots (and inevitably succeed).
Need I say more? Drop us a line and book your dive!

And last but not least: there's a feisty newcomer!
She hasn't hand fed yet but judging from the way she's been courting Rusi, it's only a matter of time until she joins the ranks of the regulars. We've named her Topsail, for obvious reasons.


Welcome to the Club young Lady!


Thursday, June 21, 2007

Dr. Juerg Brunnschweiler !

Finally!
Remember last November's post about our intrepid shark man Juerg from, of all places, frigid land-locked and mountainous Switzerland?

Well, he ain't no student no more!

Having delivered a whopping thesis about several aspects of Shark Biology, many of which have been researched on Shark Reef and my new home base in Tonga, he has brillianty survived a thorough cross-examination and now sports a fanciful Doctorate title!
And an own fancy website!

Along with having invented such useful linguistic weapons as the formal and informal "you", we Central Europeans are quite particular about such things and I already dread our next meeting in December! Will we all be clobbered into subservient adulation?

Juerg has just informed us that he plans to spend the prime Bull Shark season, January to March on Shark Reef. Planned experiments include wrapping up the ongoing small-scale movement study along with researching the Bull Shark mating grounds, general ethograms, dominance studies, food preferences and analyzing our huge data base. We're obviously eager to help and will piggyback by offering Shark Weeks, Shark Biology Courses and possibly, even Volunteer Research Assistance Programs.
There will be plenty of attractive options, so watch this space or drop us a line, whether you plan to come for a single day or for a longer stay!