Pacific Science Volume 20, Number 2, 1966

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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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Now showing 1 - 10 of 12
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    Note. Bleekeria compta: A New Binomial for a Hawaiian Apocynaceous Tree
    (University of Hawai'i Press, 1966-04) Wilbur, Robert L.
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    A Comparative Study of Craspedacusta sowerbyi and Calpasoma Dactyloptera Life Cycles
    (University of Hawai'i Press, 1966-04) Matthews, Donald C.
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    Vertical Circulation Off the Ross Ice Shelf
    (University of Hawai'i Press, 1966-04) Thomas, C.W.
    The Ross Ice Shelf is a floating ice mass about 200m thick over an average depth along the barrier of 567 m. In January the prevailing wind blows. from the east, parallel to the coast. The wind current transports the low salinity layer (ca. 50 m) toward the ice shelf, where it must descend. Directly off the barrier we find low salinities to a depth of 150 m. The circulation here is quite similar to that defined by Sverdrup along the shelf ice of Queen Maud Land. Because of sinking of the low salinity layer near the barrier, diatoms live in abundance at subcompensation depths, Trigonium arcticum actually on the sea bed.
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    Temperature and Salinity Control of the Concentration of Skeletal Na, Mn, and Fe in Dendraster excentricus
    (University of Hawai'i Press, 1966-04) Harriss, Robert C. ; Pilkey, Orrin H.
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    Some Aspects of the Behaviour of the Soldier Crab, Mictyris longicarpus
    (University of Hawai'i Press, 1966-04) Cameron, Ann M.
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    The Echinoidea Collected by the Royal Society of London Expedition to Southern Chile, 1958-1959
    (University of Hawai'i Press, 1966-04) Pawson, David L.
    The collection comprises the species Arbacia dufresnei (Blainville), Pseudechinus magellanicus (Philippi), and Loxechinus albus (Molina). Typical temnopleurid epistrorna is now known to be present in juveniles of Pseudechinus magellanicus, and the disposition of the ocular plates in the apical system in this species is determined by the position of the anal aperture. The shallow water echinoid fauna of southern Chile includes the endemic genera Loxechinus and Tetrapygus, and genera with ant arctic (Tripylus) and circumpolar (Pseudechinus) affinities.
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    Bilateral Asymmetry in Paired Meristic Characters of Pacific Salmon
    (University of Hawai'i Press, 1966-04) Landrum, B.J.
    The presence, extent, and direction of bilateral asymmetries of lateral line scales, gill rakers, branchiostegal rays, and pectoral fin rays of sockeye, chum, and pink salmon were examined. Some asymmetries were found in all characters in each species. Asymmetries, considering all species combined, occurred in approximately 72% of the lateral line scale comparisons, 59% of the gill raker comparisons, 70% of the branchiostegal ray comparisons, and 26% of the pectoral fin ray comparisons. Bilateral variation in these characters was not conclusively related to sex of the specimens ; however, some tendency toward greater asymmetry in branchiostegals of females was shown. Complete evaluation of this tendency will require further examination. Occurrences of asymmetries were evaluated in relation to the reliability of substituting counts from the opposite side when the chosen side was lost or severely damaged. Substitution of lateral line scales of sockeye salmon appeared to be feasible, but in chum salmon the right side counts were significantly greater. (Scale counts from pink salmon were not available, because of the extreme difficulty in obtaining reliable counts of the characteristically small scales.) Gill raker counts from sockeye salmon were found not to be interchangeable, as the right side counts significantly exceeded those of the left. In pink and chum salmon, bilateral variations in gill rakers appeared to be equal. Branchiostegal counts from the left sides of all species were significantly greater than those of the right. It was indicated that, for all species, pectoral fin ray counts from either side could be substituted reliably.
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    An Interpretation of the Relationships Among the Species of Parapercis, Family Mugiloididae
    (University of Hawai'i Press, 1966-04) Cantwell, George E.
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