http://hdl.handle.net/10125/916 Fri, 24 May 2013 01:30:56 GMT 2013-05-24T01:30:56Z http://hdl.handle.net/10125/1518 Wed, 01 Jan 1975 00:00:00 GMT http://hdl.handle.net/10125/1518 1975-01-01T00:00:00Z http://hdl.handle.net/10125/1517 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1517 1975-10-01T00:00:00Z St. John, Harold http://hdl.handle.net/10125/1516 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1516 1975-10-01T00:00:00Z Chow, KH; Crowder, LV http://hdl.handle.net/10125/1515 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1515 1975-10-01T00:00:00Z McCosker, John E http://hdl.handle.net/10125/1514 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1514 1975-10-01T00:00:00Z Cannon, LRG http://hdl.handle.net/10125/1513 Toxicity studies of various bivalves at Port Moresby were carried out by mouse bioassay. Crassostrea echinata was found to lose paralytic shellfish poison after 3 weeks in a closed seawater system, although toxin is retained for a much longer period in vivo. Four bivalve species tested were as toxic at 10 meters depth as they were at 2 meters. Toxin was not distributed evenly through the tissues of bivalves investigated. Mon, 01 Oct 1973 00:00:00 GMT http://hdl.handle.net/10125/1513 1973-10-01T00:00:00Z Maclean, JL http://hdl.handle.net/10125/1512 Plarynereis bicanaliculata (Baird), an annual nereid, spawned in early August at two areas in Washington state. Spawning was highly synchronous. Young were planktonic for about 1 week. Within 3 weeks they had grown to 4 mm in length, had started building tubes of mucus and diatoms, and showed a period of rapid growth in size. By the end of September or early October they averaged 10 mm in length, at which size they remained until March. In spring they reached adult length (20-23 mm) and during the summer gametes developed. Nereis vexillosa Grube egg masses were found from March through August. Nereis has a 2-year life span in both study areas, growing to one-half adult size the 1st year and to mature size the 2nd year. In the laboratory, young made tubes within 1 week after hatching from egg masses. Members of both species defend their tubes from intruders. Usually, larger individuals win fighting encounters, especially if they are the occupants of tubes. Small individuals successfully defend their tubes from larger individuals in about onehalf of the encounters; and if fights occur between equal sized individuals, occupants are usually not displaced. Fights are real, with jaws used much for biting, and smaller individuals are sometimes actually eaten by larger ones, especially In Nereis vexillosa. In the laboratory the number of individuals of N. vexillosa kept in fingerbowls decreased in number until only one or two large individuals remained. Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1512 1975-10-01T00:00:00Z Roe, Pamela http://hdl.handle.net/10125/1511 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1511 1975-10-01T00:00:00Z Poulter, JL http://hdl.handle.net/10125/1510 Radiocarbon dates are presented supporting previous estimates of a 2800- to 3000-year B.P. age for a collection of Lapita pottery sherds recovered by dredging a now-submerged coastal settlement on the island of Upolu in Western Samoa. New data describing a much enlarged collection are discussed in relation to previously reported materials, and the question of possible changes of sea level as the mechanism for submergence is evaluated. Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1510 1975-10-01T00:00:00Z Green, RC; Richards, Horace G http://hdl.handle.net/10125/1509 Wed, 01 Oct 1975 00:00:00 GMT http://hdl.handle.net/10125/1509 1975-10-01T00:00:00Z