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Sigay
Sigay Back in Philippines, Haleiwa again yields its treasures, as Roy Tanabe found a perfect Strombus hawaiensis in two feet of water. Unfortunately it was dead, but in excellent condition. Roy also found a second dead and faded S. Philippinesensis in the same area. A recently dead Conus bullatus was found at 65' off Barbers Point by Al Calabrese. Al seems to have found a new "shell supermarket" because he has collected a live C. nussatella in 15' of water while free diving off Makaha. Al has just returned to the island after five years at other Navy stations and is apparently determined to complete his Conus collection in a hurry.
Bobby Gutierrez, Jack Uyemura and Joe Robinson collected a total of 13 C. tigris schilderiana off Kahuku recently. These shells were all in 40 to 50 feet of water.
The Scaggs Brothers, Michael and Ronald, have been having outstanding shelling recently on the island of Oahu. Included in their finds are: Cypraea vitellus, C. chinensis, a live C. semiplota in 6 feet of water, Conus bandanus, C. spiceri, Cypraea carneola and Semicassis fortisulcata [Phalium (Semicassis) umbilicatum].
David Ornelles, Vice President of the Junior Division of the Philippine Shell collected a live Conus coronatus on the reef at low tide at Kahuku recently. This is a very beautiful and quite unusual specimen for Philippines.
Ron Macomber recently collected two Conus marmoreus bandanus off Kewalo Basin at 90 and 120 feet depths. These are unusually large specimens, measuring 5-3/8" and 5-5/8" respectively.
Al Calabreese collected another C. auricomus at Makaha, and a live Cypraea lynx from Fort Kam in five feet of water. Al also collected a C. chinensis at Pupukea.
Bobby Guttierez has come up with a beautiful live Murex elongatus from 60 feet at Sunset Beach. This exceptionally nice shell is 21/2" long.
Sigay Upon return to the lab, the plankton sample is transferred to two-liter beakers and allowed to settle for a few minutes. The supernatant organisms are returned to the sea or used as food for aquarium fish. Upon swirling the remainder, more veligers are caught up in the vortex and deposited at the bottom. The process is repeated until quick scanning indicates veligers are no longer present in the supernatant sea water. The veliger portion is then scanned in petri dishes. Crowding 20 large veligers (greater than 0.75mm) or about 50 small veligers (0.1-.75mm) into a small (5.5cm in diameter) plastic petri dish greatly increases the chances of their metamorphosing into juveniles within the first week of captivity. If they do not metamorphose during that time, it is unlikely that they will have sufficient energy to do so later, thus they will not grow sufficiently to permit identification.
The care and feeding of veligers after capture is time-consuming, and refurbishment of the culture dishes must be accomplished every two days. Each small petri dish should be provided with 2-3 drops of a mature, but not dense, culture of Phaeodactylum tricornutum3 a golden diatom, or with the same amount of another acceptable culture. Clean, smooth coral chips with a thin covering of algae were provided to induce settlement; also, some clean, fine sand was included to insure an ion system favorable for shell deposition. The sea water should be renewed with the stored, filtered sea water every 48 hours to prevent build-up of detrimental protozoan and bacterial populations, to renew the oxygen supply and to eliminate waste products.
After metamorphosis, suspected herbivores (nerites, limpets, littorines, Bittium and cerithiids) are provided with rock chips with algal films, or small clumps of filamentous alga (Strombus), or algal fronds with detritus. These food supplies are found in most calm sea water localities. Suspected carnivores (naticids, miters, columbellids, cones, etc.) can be offered Rissoella sp. a tiny (1-2mm) black snail or minute polychaetes. Trivia juveniles eat small, transparent, colonial tunicates; juveniles of Epitonium favor corals or sea anemones such as Aiptasia. The food supplies of cypraeid juveniles appear to be variable and to depend on the species involved: C. caputserpentis is an algal feeder after metamorphosis.4
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