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Gizo Dive Log, Solomon Islands

December, January and February 2005/6



Date: December 31st TI: 1510 TO: 1600 Max Depth: 24m
Divers: Sylvia, Rebecca, Grant, Becky

This was a patch reef with a bottom composition of sand and dead coral bommies. Marine life included fusiliers, groupers and sweetlips, also several nudibranchs and several 5cm sea cucumbers. This particular dive had no corals to speak of, however, there were several very large beautiful elephant ear sponges, some large barrel sponges, anemones and many tunicates. The visibility on this dive was poor, possibly due to local deforestation.

 

Date: January 1st TI: 1215 TO: 1305 Max Depth: 30m
Divers: Michel, Laser, Gaie, Carol
Date: January 3rd TI: 0930 TO: 1015 Max Depth: 35m
Divers: Michel, Laser, Gaie, Orla
Date: January 3rd TI: 0930 TO: 1015 Max Depth: 35m
Divers: Michel, Laser, Gaie, Orla

The bottom composition of this area was mostly dead coral. There were a few live colonies but a very intense filamentous, coralline and Halimeda algae overgrowth was present. There was a very low coral coverage, the only corals present were Acropora, Porites fingers and fire coral and these corals were mainly in the shallower zones. There were two beautiful sea fans at approximately 30m and several bleached sponges at approximately 7m. Marine life to note included 2 octopi, a turtle, a shark, emperors, fusiliers and a juvenile harlequin sweetlips. The dives here had low visibility because the water was very murky. There were a lot of glass bottles on the bottom.

 

Date: January 7th TI: 1130 TO: 1220 Max Depth: 30m
Divers: Eibes, Grant, Carol, Sylvia, Starrlight
Date: January 15th TI: 1400 TO: 1450 Max Depth: 35m
Divers: Eibes, Claus, Sylvia

The dives here were on a gradual sloping wall to 40m made up of coral rock and a bottom composition of sand. Marine life on these dives included eagle rays, fusiliers, unicornfish, sweetlips, snappers, chevron barracuda, jacks and many small reef fish. There were many small coral colonies with a high diversity of species.  There were also some larger Diploastrea colonies and a high number of sea fans. The water temperature was 30°C at 30m and visibility was about 15m. There was a strong current out of the pass running south towards the end of the dive.

 

Date: January 5th TI: 1200 TO: 1250 Max Depth: 23m
Divers: Michel, Gaie, Orla
Date: January 7th TI: 1249 TO: 1339 Max Depth: 35m
Divers: Michel, Rebecca, Becky, Kitty, Orla
Date: January 8th TI: 0655 TO: 0745 Max Depth: 37m
Divers: Sylvia, Grant, Claus, Rebecca, Becky
Date: January 8th TI: 1300 TO: 1350 Max Depth: 33m
Divers: Eibes, Carol, Gaie, Orla, Michel
Date: January 9th TI: 1130 TO: 1215 Max Depth: 37m
Divers: Eibes, Claus, Gaie, Michel
Date: January 10th TI: 1340 TO: 1430 Max Depth: 38m
Divers: Michel, Carol, Gaie, Laser, Orla
Date: January 25th TI: 1340 TO: 1430 Max Depth: 33m
Divers: Michel, Eibes, Sharman, Orla

The south side of eagle ray pass was a wall with a composition of coral, rock and dead coral. The bottom composition at 40m was sand. Over the course of all the dives in this area 4 eagle rays were seen along with 4 sharks including a white tip, black tip and grey reef shark. Overall the fish life was very diverse and included cuttlefish, 7 bumphead parrotfish, a large school of rainbow runners near the surface, paddletail snappers, emperors, black and white snappers, fusiliers, angel fish, some Napoleon wrasse, clown and moustache triggerfish, schools of barracuda, batfish, lionfish, crocodilefish, anthias and a large stingray swimming along the wall which was very unusual to see. Invertebrates included nudibranchs, crown of thorns and giant clams. On one dive a sea snake passed very close to the divers. This area had a  diverse algae, sponge and soft coral coverage.  There were large elephant ear sponges and large sea fans. Coral was diverse but with a low percentage alive on the wall and the shallow area was predominantly coral rock. There was a large section of Tubastrea.  Overall the predominant corals were Porites and Acropora with several fire coral colonies. Very few colonies were 100% healthy and there were a few diseased colonies.  The current tended to run in and out with the tide and on the majority of dives there was a light current.  On a few occasions there was a strong current running westward along the wall. The water temperature on average was between 30-31°C.

 

E) Sagarughombe Reef- Study SiteS 08°07.01' E 156°54.70'                      
Date: January 5th TI: 1030 TO: 1120 Max Depth: 12m
Divers: Sylvia, Starrlight, Becky, Katie
Date: January 5th TI: 1435 TO: 1525 Max Depth: 9m
Divers: Sylvia, Rebecca, Paul, Grant
Date: January 6th TI: 1020 TO: 1130 Max Depth: 10m
Divers: Sylvia, Katie, Kitty
Date: January 6th TI: 1430 TO: 1520 Max Depth: 8m
Divers: Starrlight, Rebecca, Becky, Paul
Date: January 10th TI: 1020 TO: 1130 Max Depth: 9m
Divers: Grant, Rebecca
Date: January 10th TI: 1430 TO: 1520 Max Depth: 12m
Divers: Starrlight, Paul, Becky,
Date: January 11th TI: 0820 TO: 0920 Max Depth: 5m
Divers: Sylvia, Orla, Paul, Kitty, Starrlight, Becky, Rebecca
Date: January 11th TI: 1430 TO: 1530 Max Depth: 9m
Divers: Sylvia, Orla, Kitty, Starrlight, Becky, Rebecca
Date: January 12th TI: 0930 TO: 1020 Max Depth: 9m
Divers: Sylvia, Grant, Kitty, Katie, Becky, Rebecca
Date: January 13th TI: 0920 TO: 1010 Max Depth: 5m
Divers: Kitty, Paul, Katie, Becky, Rebecca
Date: January 15th TI: 0930 TO: 1020 Max Depth: 25m
Divers: Kitty, Nicole, Becky, Rebecca
Date: January 16th TI: 0920 TO: 1005 Max Depth: 25m
Divers: Kitty, Starrlight, Paul, Becky, Rebecca
Date: January 25th TI: 0910 TO: 1010 Max Depth: 5m
Divers: Sylvia, Starrlight, Orla, Becky, Rebecca, Kitty
Date: January 25th TI: 1420 TO: 1520 Max Depth: 9m
Divers: Sylvia, Starrlight, Paul, Becky, Rebecca, Kitty
Date: January 26th TI: 0830 TO: 0920 Max Depth: 9m
Divers: Sylvia, Grant, Becky, Rebecca
Date: January 26th TI: 1015 TO: 1105 Max Depth: 9m
Divers: Sylvia, Starrlight, Katie, Rebecca
Date: January 26th TI: 1425 TO: 1515 Max Depth: 9m
Divers: Sylvia, Kitty, Paul, Becky, Grant
Date: January 27th TI: 0915 TO: 1005 Max Depth: 9m
Divers: Sylvia, Katie, Paul, Becky, Rebecca
Date: January 27th TI: 1040 TO: 1130 Max Depth: 9m
Divers: Sylvia, Kitty, Paul, Becky, Rebecca, Starrlight
Date: January 27th TI: 1420 TO: 1520 Max Depth: 5m
Divers: Sylvia, Starrlight, Becky, Rebecca, Paul
Date: January 31st TI: 1445 TO: 1545 Max Depth: 9m
Divers: Sylvia, Starrlight, Becky, Rebecca, Kitty
Date: February 25th TI: 1115 TO: 1145 Max Depth: 37m
Divers: Michel, Orla
Date: February 25th TI: 1430 TO: 1500 Max Depth: 18m
Divers: Michel, Orla

This site consisted of a sloping reef and bommies with a bottom composition of sand, rubble and hard substrate. This site was to be our study site in the Solomon Islands, as we had done a study on this same reef on two previous occasions.  It was a chance to have some comparative data.  During our time here we watched as bleaching events increased.  Many coral genera were affected but most heavily bleached were Stylophora, Seriatopora, Fungia, Porites, Goniastrea and Acropora. We also witnessed bleaching of anemones and some soft corals looking paler in colour. Porites dominated the shallow zones but Acropora, Goniastrea, Montipora, Fungia, Stylophora, Seriatopora and Pocillopora became abundant in the deeper zone. The condition of the coral varied around the study site from healthy coral on the lagoon side to skeletons of previous Acropora tables on the tip. There was also a high coverage of macroalgae, including Caulerpa, and filamentous algae which did not appear to affect the live coral. 

Fish life on this reef is very diverse and abundant with a healthy population of commercial fish. There were many schools of trevallies including bluefin trevallies, also groupers, snappers, emperors, bumphead parrotfish, thousands of fusiliers, pufferfish, trumpet fish, damsels and a school of 10 batfish.  Over the course of the study, we we spotted 3 eagle rays, 2 white tip and 1 black tip reef shark.

Invertebrates included  several large barrell sponges, large elephant ear sponges, nudibranchs, a vibrant red anemone, spaghetti worms, a very small number of sea cucumbers, brittle stars, hermit crabs in Porites and one crown of thorns. Also on one occasion during an observational dive along the study site we saw one green turtle swimming away in the distance.

 Two documentation dives also took place. During the first dive the divers descended down the wall to the bottom where they saw a grey reef shark with its mouth wide open at a cleaning station. There was also a large Napoleon wrasse, a large ray, one lone enormous great barracuda and a humpback grouper hiding under a sea fan. There was a garden of Turbinaria and table corals around the marker. On the second dive there were several highfin groupers, a large bumphead parrotfish and many Napoleon wrasses at the end of the dive.

The current varied on all these dives and there seemed to be no pattern to the times of high and low tides. The water temperature on this site varied from 30-31°C but after a week of bad weather the temperature had dropped to 29°C.

 

F) Kennedy IslandS 08°11.26' E 156°90.48'                      
Date: January 14th TI: 1100 TO: 1145 Max Depth: 22m
Divers: Kitty, Katie, Eddie, Nicole

This is the island where J. F. Kennedy was famously shipwrecked during World War II when his boat, the PT109, was hit during a mission along the Japanese transport route, 'The Tokyo Express'. The fringing reef around this island had a bottom composition of sand, rubble and live coral. Porites dominated with some Acropora, Turbinaria, Galaxea and Pachyseris with approximately 30% live coral cover and obvious bleaching but also a lot of rubble and a high cover of macroalgae. There were many small parrotfish, sweetlips and a black tip reef shark.

 

G) Mbambanga Reef- Night DiveS 08°06.89' E 156°53.10'                      
Date: January 9th TI: 2000 TO: 2050 Max Depth: 7m
Divers: Laser, Gaie, Orla, Paul, Katie

This night dive took place at the ship's anchorage near the island of Mbambanga. The area had a bottom composition of coral rock, rubble, sand and sea grass. There were many sleeping reef fish, shrimps and crabs. The coral coverage was mostly Porites and there was one massive Lobophyllia in perfect condition. There was a lot of sedimentation on the reef and algae overgrowth. No current or swells were experienced, the water temperature was 30°C and there was a 3/4 moon.

 

H) Toa Maru- A WWII WreckS 08°03.10' E 156°50.10'                      
Date: February 25th TI: 0930 TO: 1030 Max Depth: 37m
Divers: Kitty, Paul, Becky, Katie, Rebecca, Sharman, Sylvie

This wreck dive was on a Japanese transport ship from the Tokyo Express route which was hit by a torpedo during World War II and sank close to shore. This dive was organized with a local dive company 'Dive Gizo'. We were taken by one of their experienced dive masters for a tour of the ship. During the dive we saw a torpedo launcher, machine guns, a lot of ammunition and sake bottles.  We also saw the place where the ship had been hit. There were many corals growing on the ship however many of them were bleached including Pachyseris.

 

 

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