James G. Morin
University of California, Los Angeles
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Featured researches published by James G. Morin.
Science | 1975
James G. Morin; Anne Harrington; Kenneth H. Nealson; Neil R. Krieger; Thomas O. Baldwin; J. W. Hastings
The flashlight fish, Photoblepharon, possesses headlight-like luminous organs situated in the orbit just below the eyes. On the basis ofdirectfield and laboratory studies, it is postulated that the bioluminescence is used by the fish for many different functions: to assist in obtaining prey, to deter or escape predators, and for intraspecific communication. Thefish also uses its light to see by. A biologically generated light may be used by an organism in different specific ways for several distinct functions (1-3). In most of the luminous organisms that have been analyzed, the proposed functions of light emission fall in three major categories. The first is assisting predation (offense). For example, certain of the mesopelagic ceratioid angler fish, such as Melanocetus murrayi (4) and Oneirodes acanthias (5), have a luminous organ (esca) which presumably functions as a lure (1, 2). Similarly, the firefly femme fatale (Photuris versicolor), in addition to using her light organ to signal the male of her own species, mimics the courtship signal of other species, attracting males whom she then eats (6). The second major function is Fig. 1. The flashlight fish, Photoblepharon palpebratus, photographed at night along the reefs in the Gulf of Elat, Israel, by the light emitted from its own luminescent organ (A) and with an underwater strobe light (B, C, and D). The reflective areas of the lateral line, the edges of the fin rays, and the operculum are not luminescent. (B) A pair of Photoblepharon in their intertidal territory
Deep Sea Research | 1978
Edward G. Ruby; James G. Morin
Abstract Three hundred and twenty-five bacterial clones were isolated from the luminescent organs of 12 specimens of three species of the bathyal fish family Macrouridae ( Nezumia aequalis, N. stelgidolepis , and Sphagemacrurus hirundo ) from both the Atlantic and Pacific oceans and four specimens of the midwater Opisthoproctus grimaldii . All of the isolates were the luminous psychrotrophic bacterium Photobacterium phosphoreum . This bacterium is the luminous species best suited to the cold temperatures of the deep-sea habitats where these fish families are encountered. On the other hand, previous studies have shown that luminous bacteria from luminescent organs of shallower water fishes of the temperate regions (Monocentridae) and tropics (Leiognathidae) contain the mesotrophic bacteria P. fischeri and P. leiognathi , respectively. The differences in luminous bacterial symbionts, the distant phylogenetic relationships, and the marked differences in the structure and location of the luminescent organ among these four fish families suggest an independent and multiple origin of each of these bacteria-fish associations.
Biochimica et Biophysica Acta | 1973
John E. Wampler; Yashwant D. Karkhanis; James G. Morin; Milton J. Cormier
Abstract 1. The in vivo bioluminescence spectra of six species of cnidarians from the subclass Alcyonaria, order Pennatulacea, have been examined. They are all strikingly similar having as a predominant feature a narrow green emission peak with a maximum at 19 640 cm−1 (509 nm). Each of these spectra is structured with a shoulder in the region of 18 500 cm−1 (540 nm) and in some cases another shoulder in the 21 000-cm−1 (475-nm) region. 2. A protein bound green-fluorescent chromophore has been isolated from each of these animals. The fluorescence spectra of these chromophores are identical. Their peak position, 19 640 cm−1 (509 nm), and narrow structured character strongly suggest that they represent the emitter responsible for the corresponding parts of the bioluminescence spectra. 3. The data indicate that in each of these Pennatulids, the overall bioluminescence spectrum can be explained as the combination of two emitting species, the fluorescence of the green-fluorescent, protein-bound chromophore and the broad blue fluorescence typical of the in vitro reactions.
Science | 1982
J. A. Peterson; John A. Benson; Margaret Ngai; James G. Morin; Cathy Ow
Skeletal structures that resist only tensile forces can scale differently than compression resisting structures that fail in bending or buckling. The tensile structures examined scalelike simple ropes: length and diameter of the structure are not correlated, and in three of four cases, length is independent of scale or load, but diameter is dependent on scale. These relations suggest that similarity in stress rather than strain, or deformational behavior, is the basis for mechanical adaptation in the gross dimensions of these tensile structures.
Journal of Cellular Physiology | 1973
Milton J. Cormier; Kazuo Hori; Yashwant D. Karkhanis; James M. Anderson; John E. Wampler; James G. Morin; J. W. Hastings
Zoological Journal of the Linnean Society | 1993
Anne C. Cohen; James G. Morin
Archive | 1990
Anne C. Cohen; James G. Morin
Acta Zoologica | 1997
Anne C. Cohen; James G. Morin
Journal of Zoology | 1984
J. A. Peterson; J. A. Benson; James G. Morin; M. J. Mcfall-Ngai
Bulletin, Southern California Academy of Sciences | 1988
James G. Morin; Jon S. Kastendiek; Anne Harrington; Noel Davis