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Diver disentangling rope from regulator while getting ready to lay a t...

Diver disentangling rope from regulator while getting ready to lay a transect line. Photo

Small coral colonies were collected on pipe surfaces of know age to de...

Small coral colonies were collected on pipe surfaces of know age to determine growth rate of corals on the artificial reef. Photo

Natural reef areas close to the artificial reef site were also sampled...

Natural reef areas close to the artificial reef site were also sampled to determine the biomass and species composition of fish Photo

A diver equipped with underwater tape recorder, wetsuit, watch for det...

A diver equipped with underwater tape recorder, wetsuit, watch for determining dive time. Photo

Straightening out one of the underwater transect lines used for counti...

Straightening out one of the underwater transect lines used for counting fish Photo

Underwater writing slates were used to record the different species ad...

Underwater writing slates were used to record the different species adhering to the top, side and interior roof of pipes over time Photo

Underwater tape recorders were used to record the number and size of e...

Underwater tape recorders were used to record the number and size of each fish species on a set transect Photo

Underwater writing slates were used to record the different species ad...

Underwater writing slates were used to record the different species adhering to the top, side and interior roof of pipes over time. Photo

Tires being placed in an array to determine their effectiveness as hab...

Tires being placed in an array to determine their effectiveness as habitat for fish. Photo

Tires being placed in an array to determine their effectiveness as hab...

Tires being placed in an array to determine their effectiveness as habitat for fish. Photo

Navy divers assisting in the placement of used tires as an alternate r...

Navy divers assisting in the placement of used tires as an alternate reef material on the artificial reef site at Pokai Bay, Oahu Photo

Navy divers assisting in the placement of used tires as an alternate r...

Navy divers assisting in the placement of used tires as an alternate reef material on the artificial reef site at Pokai Bay, Oahu Photo

Invertebrate samples were collected from pipe surfaces for identificat...

Invertebrate samples were collected from pipe surfaces for identification. Photo

Underwater tape recorders were used to record the number and size of e...

Underwater tape recorders were used to record the number and size of each fish species on a set transect Photo

Secchi disc readings were used to determine turbidity at the reef site...

Secchi disc readings were used to determine turbidity at the reef site on a regular basis Photo

Investigating some of biota on the reef took close observations in dif...

Investigating some of biota on the reef took close observations in difficult circumstances. Photo

Divers preparing for dive on the artificial reef site off the Leeward...

Divers preparing for dive on the artificial reef site off the Leeward Coast of Oahu close to Pokai Bay. Photo

Collecting fish by Hawaiian style spear for determining stomach conten...

Collecting fish by Hawaiian style spear for determining stomach contents. Photo

Small pipes were moved to the interior of larger pipes to create more...

Small pipes were moved to the interior of larger pipes to create more complex habitats for comparative studies. Photo

Small pipes were moved to the interior of larger pipes to create more...

Small pipes were moved to the interior of larger pipes to create more complex habitats for comparative studies. Photo

Moving pipe pieces into exclusion cages for grazing study.

Moving pipe pieces into exclusion cages for grazing study. Photo

Installing exclusion to determine the effect of grazing on algal and i...

Installing exclusion to determine the effect of grazing on algal and invertebrate populations on the reef. Photo

Exclusion cages were used to determine the effect of grazing on algal...

Exclusion cages were used to determine the effect of grazing on algal and invertebrate populations on the reef Photo

Attaching 1/4 square meter grid to pipes by rope

Attaching 1/4 square meter grid to pipes by rope Photo

Marine snow, detrital/particulate matter surrounding two adjacent pipe...

Marine snow, detrital/particulate matter surrounding two adjacent pipes on reef Photo

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