Pacific Science Volume 25, Number 4, 1971

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Pacific Science is a quarterly publication devoted to the biological and physical sciences of the Pacific Region.


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    25: Index - Pacific Science
    (University of Hawai'i Press, 1971)
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    Absorption of Water and Nuclear Lens Protein by Nuclear Lens Tissue
    (University of Hawai'i Press, 1971-10) Smith, Albert C.
    Intrinsic water and soluble protein were removed from insoluble nuclear lens tissues of bigeye tuna, yellowfin tuna, and squid. These lens tissues were then used to absorb water and protein from extracts of nuclear tissue from these species. The quantity and type of absorption between the tunas were similar; between the tunas and squid, dissimilar. This indicates that nuclear lens tissue can be used to demonstrate both close and distant phylogenetic relationships.
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    On the Opisthobranch Genus Haminoea Turton & Kingston
    (University of Hawai'i Press, 1971-10) Rudman, W.B.
    A study was made of Haminoea zelandiae, H. solitaria, H. cymbalum, and H. crocata. The reproductive systems show a close similarity to that of Aplysia and lack of important anatomical differences show that Haloa and Lamprohaminoea are unnecessary genera. The mantle cavity, alimentary canal, and nervous system show the relationship of Haminoea to Atys and Smaragdinella.
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    Periclimenes attenuatus sp. nov. (Crustacea, Decapoda, Natantia, Pontoniinae), a New Commensal Shrimp from the Duke of York Islands
    (University of Hawai'i Press, 1971-10) Bruce, A.J.
    Periclimenes attenuatus, a new species of pontoniid found in association with an unidentified crinoid from the Duke of York Islands, New Ireland, Bismarck Archipelago, is described and its morphology illustrated. The distinctive features of the shrimp and its relationship to other species of the genus is discussed. The information available concerning pontoniid-crinoid associations is reviewed and tabulated.
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    Sunaristes (Copepoda, Harpacticoida) Associated with Hermit Crabs at Eniwetok Atoll
    (University of Hawai'i Press, 1971-10) Humes, Arthur G.
    Sunaristes at Eniwetok differ only slightly from S. dardani Humes and Ho in Madagascar and are regarded as conspecific with that species. Dardanus scutellatus is a new host for Sunaristes dardani.
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    Tortanus scaphus and Tortanus lophus, New Pacific Planktonic Copepods, with Notes on Tortanus murrayi (Calanoida, Tortanidae)
    (University of Hawai'i Press, 1971-10) Bowman, Thomas E.
    The calanoid genus Tortanus contains 17 known species of predaceous copepods which inhabit coastal waters of the world, except the Antarctic, eastern North Atlantic, and Mediterranean. All except T. vermimlus Shen (1955) and T. denticulatus Shen & Lee (1963) are listed in Jones and Park (1968). Two schemes have been proposed to subdivide the genus Tortanus. Steuer (1926) divided the eight species then known into three groups, without giving names to the groups. Sewell (1932) assigned the seven Indian Ocean species to two subgenera, Tortanus and Atortus. Sewell's subgenera correspond exactly to two of Steuer's groups, but Sewell made no mention of Steuer's classification, even though he listed Steuer's revision in his bibliography (Sewell, 1929).
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    Feeding Behavior in the Hawaiian Zoanthids Palythoa and Zoanthus
    (University of Hawai'i Press, 1971-10) Reimer, Amada A.
    Palythoa psammophilia Walsh & Bowers and Zoanthus pacificus Walsh & Bowers are two subtropical, subtidal zoanthids closely related phylogenetically but widely different in their feeding methods. Palythoa is a predator that feeds on zooplankton, particularly crustaceans. Of a vast array of items offered to Zoanthus in the laboratory, only small pieces of freshly killed or frozen fish elicited positive feeding responses. In natural situations Zoanthus has never been observed to feed. Palythoa polyps capture live prey with their tentacles and use these to hold the prey against the peristome. Very few nematocysts are discharged and they do not paralyze the prey. The behavioral response called "tentacle protrusion" allows the polyps to capture additional prey while ingesting one just caught. The optimum density of zooplankton, which causes the fastest response and largest capture, was found to be 200 Artemia per m^3. This represents approximately 10 times the zooplankton density calculated for the natural environment of Palythoa. After the food has been obtained, either by capture (Palythoa) or seizure of items (Zoanthus), both animals show the same complex and orderly series of steps which is called the feeding reaction and consists of the following: (1) Lip formation. A group of tentacles seizes the food, the edge of the disc carrying these tentacles first contracts, then rises up and turns inward, thereby folding tentacles and food toward the mouth; (2) Mouth opening. Upon contact with the food, the mouth borders separate and the food is swallowed; and (3) Ingestion response. Food disappears in the coelenteron and the borders of the mouth close over it.
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    Pteridophyta of the Southern Cook Group
    (University of Hawai'i Press, 1971-10) Brownlie, G. ; Philipson, W.R.
    The fern flora of Rarotonga was exhaustively collected as long ago as 1899 by the New Zealand botanist T. F. Cheeseman (1903). A second comprehensive account appeared almost 30 years later (Wilder, 1931), and a less complete collection of ferns by Harold E. and Susan Thew Parks was reported on by Copeland (1931). Several other visitors to the island have collected ferns, Armstrong (date unknown), B. B. Given, and Mrs. Hynes each twice during the 1960s and Stoddart in 1969. The most recent collection is that made by one of us (W. R. Philipson, 1969) on the expedition organized by the Royal Society of New Zealand to commemorate Captain Cook's early explorations.
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    Studies of Pacific Island Plants, XXII. New Flowering Plants from Fiji
    (University of Hawai'i Press, 1971-10) Smith, Albert C.
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