Wednesday, July 15, 2015

BUNAKEN ISLAND_BEST DIVE SPOT AREA: FUKUI SITE,MUKA KAMPUNG & LEKUAN 1,2 (South Side Of Bunaken Island).


Fukui Dive Spot

Fukui,Lekuan 1,2,3 Dive Spot

Dive Spot Map



DIVE SPOT DESCRIPTION.

FUKUI SITE.
It is a sandy slope with steep drops. Here you can observe different "cleaning stations" and their customers. Is possible to spot jacks, barracuda, bat fish, tuna, snappers.Fukui site Named after a Japanese diver who dived this site 20 years ago and wrote an article about it. Fukui is very different than the rest of Bunaken's dive sites, as it is actually the only divesite with a gentle slope. It is not just sloping, there are a few short steep drops , but alltogether, Fukui is a good start for a first dive.
It is also a so called "cleaning station", which means that all kinds of big fish have themselves cleaned while they take a rest. It is a perfect place to observe Napoleon wrasse, barracuda, Jacks and big snapper. A more sandy part of Fukui is home to a colony of garden eels. Spectacular but rare sightings have been thresher shark and a huge ocean sunfish. At a depth of about 17 metres, there are 5 big "Tridacna" giant clams lying in a row. Fukui normally has a very mild current that can occasionally be a bit stronger. Averange visibility is 20-25 meters,A sandy area at Fukui is home to a colony of garden els. At a depth of 20-22 metres are 5 "Tridacna" giant clams lying in a row (size around 1m each). Current can be strong depending on the tides.

MUKA KAMPUNG (Front of the Village).
Located in front of Bunaken Village. A steep drop-off on which we are often in company with eagle rays, sting rays, tunas, napoleon, fantastic soft corals and nudibranches, crabs, shrimps. Also the right location to observe Mandarin Fish mating in a late afternoon dive.Located opposite the village of Bunaken. A steep drop off with a sandy sloping path on the tip of the reef corner, where we often observe eagle ray, stingray and thousands of butterfly fish. Even from the surface, currents are visible and Muka Kampung normally ends up as a good old fashiond drift dive. Traditionally, "Muka Kampung"is the enterance to the village of Bunaken. Until now, strait over the reef flat,There are advanced plans for the construction of a permanent landing jetty,so further damage in the future will be prevented. Visibility varies from 15 to 30 metres.

LEKUAN 1 (or TURTLE CITY).
The 3 “lekuans” are considered a signature of Bunaken world famous wall diving. A dramatic drop off of 40-50m followed by a step and than again precipitating in the blue. Very common to spot huge (up to 2m) green turtles, sharks (white tip, black tip), napoleon and “clouds” of schooling fish like anthias, fusiliers, butterfly, red tooth triggerfish. Many macro species in the shallows as well as scorpions (devil, ambon, leaf ) and stone fishes.A very popular diving spot, Lekuan I is home to the Bannerfish, Napoleon Wrasses, and a large school of Pyramid Butterflyfish. It is also possible to see Turtles and Angelfish here. At 35 meters it is common to encounter Blacktip Sharks and large Trevallies,This is not for the faint hearted ! Rated : Advanced diver with 20 logged dives; currents; average visibility 30 m.


LEKUAN 2
Wall reef with many vertical drops, cuts, holes and overhangs. Excellent numbers and variety of almost all kinds of reef fish as well as invertebrate life.This steep coral wall with vertical canyons offers you a nice moderate drift dive. The reef is swarming with numerous schools of tropical reef fish swimming around a variety of soft and hard corals from the top of the reef down to 20 meters. Butterfly fish and Banner fish are a common sight here. It is also possible to encounter Napoleon Wrasses, Turtles, and Sharks. Rated :Vertical wall; adv diver:depth 10-25 m; currents:av vis 30 m


LEKUAN 3
A sandy sloping bottom at first with pinnacles and outcroppings make Lekuan 3 a different underwater landscape.The “scenario” then changes into a vertical wall dropping into the deep ocean,Numerous nudibranchs, leaf fish, ghostpipefishes, scorpion fish as well as green turtles, sharks, snappers. Here is also possible for a trained eye to spot the rare and tiny (4/5 mm) Hippocampus pontohi (a newly-discovered species of pygmy seahorse) One of the most beautiful dives off Bunaken Island. A very special site for night diving,Barracudas, Reef Whitetip Sharks, Bamboo Sharks, and Sponge Crabs are common here. Cleaner shrimp, Scorpion fish, large Nudibranches, Cuttle fish, Spanish Dancers, Basket Stars are seen here. Anything is possible Rated :Beginner diver; vertical wall diving: depth 5-25 and av vis 35 m.

BEST DIVE SPOT AREA: TUMBAK ISLAND,TANJUNG POPAYA (Popaya Cape) & CORAL POOL,Bentenan Beach,Southeast Minahasa,North Sulawesi.





DIVE SPOT DESCRIPTION:

TUMBAK ISLAND,POPAYA CAPE & CORAL POOL.

Tumbak is the name of a village located in the district Posumaen Southeast Minahasa regency. To reach the village Tumbak, from the city of Manado takes a 3 hour trip.The village is blessed with stunning natural beauty. Underwater beauty Tumbak no less impressive with the beauty of Bunaken marine park that is famous throughout the world.But the natural beauty above the sea in the form of small islands of white sandy become more value that is not owned by Bunaken. To better enjoy the natural beauty Tumbak good you are in this village at least 2 days,When viewing the underwater beauty snorkeling or diving with your eyes will be spoiled with underwater scenery is so beautiful with hundreds of species of fish with various types such as common lionfish, Banggai fish, nudibranchs, cardinalfish, clownfish, napoleon wrasse, angelfish, surgeonfish, unicornfish,morish idol, damselfish, groupers, Parrotfishes, zebra lionfish, lizardfishes and much more. In addition you can also see various sea stars are so beautiful with a wide colours variety,Besides seeing types divers of fish, your eyes will also be spoiled with such a vast expanse of good coral and hardcoral softcoral area of ​​approximately 100 hectares with various shapes beautiful coral and colorful (brain coral one). Not only there, if you are already proficient diving / snorkeling, you can see the sea fan forests of diverse types of measuring 300 meters at a depth of 3-6 meters. So ?? Still want to trave this marine paradise??

BUNAKEN ISLAND_BEST DIVE SPOT AREA (EAST BUNAKEN)





DIVE SPOT DESCRIPTION:

BUNAKEN TIMUR (East Bunaken).

A great dive site right in front of RAJA LAUT, very good for snorkelling too with a beautiful reef with lush coral growth. Is a very long reef covering all the east side of the island between the village of Bunaken and Sachiko’s Point. It can be divided in at least 2 or 3 dive spots.

Sharks, barracudas, groupers, napoleons, eagle rays and a lot of small and colourful reef fish. Few times I saw at the top reef a blue rings octopus hiding between the corals,Possible to do a night dive in front of our Resort during which is easy to spot different species of crabs (decorator, sponge), bamboo sharks, big nudibranchs, snails, sea snakes, moray eels, green turtles.


BUNAKEN ISLAND_BEST DIVING SPOT AREA: LEKUAN 1,2,3 (CITY of GREEN TURTLE)




THE BEAUTY of BUNAKEN ISLAND, NASIONAL MARINE PARK.

Bunaken is an island of 8 km², part of the Bunaken National Marine Park. Bunaken is located at the northern tip of the island of Sulawesi, Indonesia. It belongs administratively to the municipality of Manado. Scuba diving attracts many visitors to the island,Bunaken National Park extends over an area of 890.65 km² of which only 3% is terrestrial, including Bunaken Island, as well as the islands of Manado Tua, Mantehage, Nain and Siladen.

The waters of Bunaken National Marine Park are up to 1,566 m deep in Manado Bay, with temperatures ranging between 27 to 29 °C. It has a high diversity of - corals, fish, echinoderms or sponges. Notably, 7 of the 8 species of giant clams that occur in the world, occur in Bunaken. It also claims to have seven times more genera of coral than Hawaii,and has more than 70% of all the known fish species of the Indo-Western Pacific.

Oceanic currents may explain, in part, why Bunaken National Marine Park has such a high level of biodiversity. Northeasternly currents generally sweep through the park but abundant counter currents and gyros related to lunar cycles are believed to be a trap for free swimming larvae. This is particularly true on the south side of the crescent-shaped Bunaken Island, lying in the heart of the park. A snorkeler or diver in the vicinity of Lekuan or Fukui may spot over 33 species of butterfly fish and numerous types of groupers, damsels, wrasses and gobies. The gobies, smallish fish with bulging eyes and modified fins that allow them to attach to hard surfaces, are the most diverse but least known group of fish in the park.

BUNAKEN ISLAND,DIVING SPOT AREA.

LEKUAN 1 (or TURTLE CITY)
The 3 “lekuans” are considered a signature of Bunaken world famous wall diving. A dramatic drop off of 40-50m followed by a step and than again precipitating in the blue. Very common to spot huge (up to 2m) green turtles, sharks (white tip, black tip), napoleon and “clouds” of schooling fish like anthias, fusiliers, butterfly, red tooth triggerfish. Many macro species in the shallows as well as scorpions (devil, ambon, leaf…) and stone fishes.

LEKUAN 2
Wall reef with many vertical drops, cuts, holes and overhangs. Excellent numbers and variety of almost all kinds of reef fish as well as invertebrate life.


LEKUAN 3
A sandy sloping bottom at first with pinnacles and outcroppings make Lekuan 3 a different underwater landscape. The “scenario” then changes into a vertical wall dropping into the deep ocean. Numerous nudibranchs, leaf fish, ghostpipefishes, scorpion fish as well as green turtles, sharks, snappers. Here is also possible for a trained eye to spot the rare and tiny (4/5 mm) Hippocampus pontohi (a newly-discovered species of pygmy seahorse)

Monday, July 13, 2015

LIFE HISTORY_INDONESIAN COELACANTH (IKAN RAJA LAUT) (Latimeria Manadoensis)





LIFE HISTORY_INDONESIAN COELACANTH (IKAN RAJA LAUT) (Latimeria Manadoensis)

The Indonesian coelacanth (Latimeria manadoensis, Indonesian: raja laut) is one of two living species of coelacanth The other species, L. chalumnae (West Indian Ocean coelacanth) is listed as critically endangered,On September 18, 1997, Arnaz and Mark Erdmann, traveling in Indonesia on their honeymoon, saw a strange fish enter the market at Manado Tua, on the island of Sulawesi.Mark thought it was a gombessa (Comoro coelacanth), although it was brown, not blue. An expert noticed their pictures on the Internet and realized its significance. Subsequently, the Erdmanns contacted local fishermen and asked for any future catches of the fish to be brought to them. A second Indonesian specimen, 1.2 m in length and weighing 29 kg., was captured alive on July 30, 1998.It lived for six hours, allowing scientists to photographically document its coloration, fin movements and general behavior. The specimen was preserved and donated to the Museum Zoologicum Bogoriense (MZB), part of the Indonesian Institute of Sciences (LIPI).

DNA testing revealed that this specimen differed genetically from the Comorian population.Superficially, the Indonesian coelacanth, locally called raja laut ("King of the Sea"), appears to be the same as those found in the Comoros except that the background coloration of the skin is brownish-gray rather than bluish. This fish was described in a 1999 issue of Comptes Rendus de l'Académie des sciences Paris by Pouyaud et al. It was given the scientific name Latimeria menadoensis.In 2005, a molecular study estimated the divergence time between the two coelacanth species to be 40–30 mya,On November 5, 2014 a fisherman found the species in his net. It was the seventh Indonesian coelacanth found in Indonesian water since 1998.
(Source:wikipedia)

On the Trail of the Coelacanth, a Living Fossil.

She had no way of knowing what would happen. Nobody did. But Arnaz Mehta Erdmann was about to notice something that would rewrite a chapter in the history of biology,Not that she had been looking. In fact, she and her husband Mark were on their honeymoon, strolling through the outdoor market in Manado, a town at the tip of an island called Sulawesi in Indonesia. Hundreds of fishermen work the surrounding Celebes Sea, and on that September day last year the marketplace was teeming with variety,None of the catch, however, looked remotely like the weird thing that Arnaz saw being pushed along in a wooden cart. It was several feet long, with stumpy, lobed appendages where other fish have conventional fins. It was covered with heavily armored scales.

Arnaz called Mark's attention to the creature. To most folks, the fish might have been little more than a curiosity, but Mark was a marine biologist with a recent PhD from the University of California at Berkeley, resulting from his study of mantis shrimps in Indonesia. He recognized it immediately as a coelacanth, a "living fossil" whose body plan hadn't changed appreciably in hundreds of millions of years.

But that didn't make sense. Mark had been taught that coelacanths not only were extremely rare but also had never been seen outside the western Indian Ocean. He photographed the creature and asked the fisherman where he had obtained it. Apparently, it was local. Surprised, Mark reluctantly assumed that the living fossils had been observed in the western Pacific and that somehow he had missed hearing of the discovery,Not until he and Arnaz returned to Berkeley did Mark learn that coelacanths had never been sighted east of Madagascar. They definitely weren't supposed to be in Indonesia, about 6,000 miles away. But then, only a few decades before, they weren't supposed to be anywhere at all.

Sixty years earlier, the coelacanth (pronounced SEE-la-kanth), previously known only through fossil specimens, had shocked the scientific world when a living specimen was discovered in South Africa. The news was akin to finding a living dinosaur wandering Earth today,Marjorie Courtney-Latimer, a young curator of the East London Museum in South Africa, was building a scientific collection of fishes and had arranged with a local fisherman, Capt. Hendrik Goosen, to collect specimens for the museum.

On Dec. 22, 1938, Courtney-Latimer received a phone call: Goosen's trawler was at the dock with a large haul of fish taken near the mouth of the Chalumna River. Although pressed for time and not wanting to travel to the docks, she felt that the least she could do for the ship's crew was "to go down and wish them the compliments of the season."Among many specimens strewn across the deck, she saw a very strange fish five feet long. "I noticed a blue fin sticking up from beneath the pile," she wrote. "I uncovered the specimen, and, behold, there appeared the most beautiful fish I had ever seen."

Courtney-Latimer didn't know what the fish was but had a hunch that she should save it. The local hospital morgue turned her down, as did the town's only cold-storage facility. So she wrapped it in rags soaked in formaldehyde. After several days, it became evident that this method was not sufficiently preserving the fish, so she opted for taxidermy and, as a result, preserved only the skin and a few hard parts,Using one of the few books available to her, she traced the fish, uncertainly, to the family called coelacanths [above]. The chairman of her museum's board of trustees dismissed it as a rock cod.

Undaunted, Courtney-Latimer sent a sketch and description to J.L.B. Smith, then a chemistry professor and resident fish expert at Rhodes University in Grahamstown. When he finally received the letter, Smith was dumbfounded. Could it be true? The drawing clearly depicted a coelacanth. Yet they presumably had become extinct 80 million years earlier!

Smith wired Courtney-Latimer: "Save viscera...fish interesting." But the message arrived too late; the organs had rotted,Courtney-Latimer's persistence, against great odds, paid off on Feb. 16, 1939, when Smith traveled to New London and confirmed her suspicion. The fish was named Latimeria chalumnae in honor of the discoverer and the site of the find,It took 14 years to find another one. Smith searched the waters around South Africa and the eastern coast of Africa, eventually preparing handbills describing the fish and offering a reward,Finally, those handbills made their way to the Comoro Islands where, on Dec. 20, 1952, a specimen weighing 88 pounds was captured. After a hurried plane ride, Smith held a coelacanth in his hands, causing him to weep with joy.

Before the Erdmanns' discovery in Indonesia, about 200 specimens had been captured, half of which were available for scientific study. All were from the western Indian Ocean, primarily around two of the Comoro Islands off the northwestern coast of Madagascar. Several "strays" have been captured off South Africa, Mozambique and Madagascar.

The total coelacanth population is thought to be 500 or fewer, a number that would threaten the survival of any species. So in accordance with an international treaty known as the Convention on International Trade of Endangered Species, the coelacanth was added to Appendix I (threatened with extinction) in 1989,This treaty forbids international trade for commercial purposes and regulates all trade, including sending specimens to museums, through a system of permits.

Having learned all this before his return to northern Sulawesi last November, Mark Erdmann began trying to find the fisherman he had met in the market and to determine whether the fish had been captured in Indonesian waters. He had studied the ecology of coral reefs in the area for seven years and was fluent in the language.After talking to about 200 fishermen, he located the one from the market and three others who convincingly claimed to have captured coelacanths.

At that point, an ethical dilemma arose. Mark wanted to retrieve a specimen for science and report the discovery, but he could not induce the local fishermen to fish purposely for a rare and endangered species. His strategy was to provide sufficient compensation to make it worthwhile for the fishermen to bring the fish to him if caught but not so much money that they would be enticed to abandon other pursuits.Naturally interested was the Smithsonian Institution's National Museum of Natural History, which has the world's largest research collection of preserved fishes, including a coelacanth from the Comoros.

In my capacity as manager of the collection, I had been in contact with Mark since shortly after his honeymoon discovery, and we had established an appropriate plan for what to do with a specimen if one was caught.It would have to be preserved properly, but before doing so, tissue samples would be taken for DNA analysis. Those samples would help determine whether the Indonesian coelacanth is a member of the same species as the Comoros specimens.

After advising Mark about appropriate organs to sample, I equipped him with a liquid nitrogen container for storing the tissue samples, and the Smithsonian provided funding to keep a whole specimen frozen until it could be fixed in formaldehyde and permanently preserved in ethyl alcohol. So he was ready on the morning of last July 30 when the critical moment came.Sharks bring a handsome price in that part of the world, and Mark's prize surfaced in a deep-water shark net set by fishermen off the volcanic island of Manado Tua in northern Sulawesi. The net, lowered at dusk and raised at dawn, is about 330 feet long and 33 feet high and works by entangling fish that swim into it,On this morning, it yielded a spectacular catch from about 400 feet -- a four-foot coelacanth weighing 64 pounds.

The fisherman, Om Lameh Sonatham, brought the fish, still alive, to Mark's house along the shoreline of the neighboring island. The fish is known locally as raja laut (king of the sea) and apparently has been captured at a rate of two to three a year for several years.

The fish lived for nearly six hours, allowing Mark and Arnaz to document photographically its coloration, fin movements and general behavior. Superficially, it looked the same as those found in the Comoros except that the background color was brownish-gray rather than bluish,Although the fish was greatly stressed, as any would be when raised from such depths, it demonstrated quite effectively the typically fantastic movement of its lobed fins. In the Comoros, recompression efforts have failed, and no specimen has stayed alive for more than a day.

Mark donated the specimen to the Museum Zoologicum Bogoriense (MZB), part of the Indonesian Institute of Sciences (LIPI). He also invited me to Indonesia to assist with preservation of the coelacanth and to meet with LIPI officials to discuss a future specimen donation to the Smithsonian,After we shipped the frozen fish to Jakarta, MZB officials transferred the specimen to their new state-of-the-art museum facility in Cibinong between Bogor and Jakarta. There we jointly performed more dissections. Finally, we preserved the coelacanth by injecting formaldehyde, followed by immersion in a solution of formaldehyde. After an appropriate fixation period, the specimen was transferred to ethyl alcohol for long-term storage and display in the MZB.

Mark's report of the discovery, coauthored with Roy L. Caldwell, his graduate adviser, and a colleague from LIPI, M. Kasim Moosa, appeared in the Sept. 24 issue of the journal Nature. Unconfirmed sightings are now being reported elsewhere in Indonesia, and researchers are gearing up for underwater exploration.Where else do the living fossils live? How plentiful are they? These and related questions will keep scientists occupied for years.

(By:Susan L. Jewett is_collection manager in the Division of Fishes at the Smithsonian Institution's National Museum of Natural History)

Scientific classification:
Kingdom: Animalia
Phylum: Chordata
Class: Sarcopterygii
Order: Coelacanthiformes
Family: Latimeriidae
Genus: Latimeria
Species: L. manadoensis.
(Source: wikipedia)