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  • 1
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    Unbekannt
    In:  Geophysics, Taipei, 3-4, vol. 35, no. 2, pp. 254-269, pp. 1429, (ISSN: 1340-4202)
    Publikationsdatum: 1970
    Schlagwort(e): Borehole Televiewer ; Borehole geophys. ; Layers
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 1989-01-06
    Beschreibung: In 1986 more than 8 million liters of crude oil spilled into a complex region of mangroves, seagrasses, and coral reefs just east of the Caribbean entrance to the Panama Canal. This was the largest recorded spill into coastal habitats in the tropical Americas. Many population of plants and animals in both oiled and unoiled sites had been studied previously, thereby providing an unprecedented measure of ecological variation before the spill. Documenation of the spread of oil and its biological begun immediately. Intertidal mangroves, algae, and associated invertebrates were covered by oil and died soon after. More surprisingly, there was also extensive mortality of shallow subtidal reef corals and infauna of seagrass beds. After 1.5 years only some organisms in areas exposed to the open sea have recovered.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jackson, J B -- Cubit, J D -- Keller, B D -- Batista, V -- Burns, K -- Caffey, H M -- Caldwell, R L -- Garrity, S D -- Getter, C D -- Gonzalez, C -- Guzman, H M -- Kaufmann, K W -- Knap, A H -- Levings, S C -- Marshall, M J -- Steger, R -- Thompson, R C -- Weil, E -- New York, N.Y. -- Science. 1989 Jan 6;243(4887):37-44.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17780421" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2003-11-15
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mazel, C H -- Cronin, T W -- Caldwell, R L -- Marshall, N J -- New York, N.Y. -- Science. 2004 Jan 2;303(5654):51. Epub 2003 Nov 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Physical Sciences Incorporated, 20 New England Business Center, Andover, MA 01810, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14615546" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Animal Communication ; Animals ; Color Perception ; Crustacea/anatomy & histology/*physiology ; *Fluorescence ; Light ; Male ; Photoreceptor Cells, Invertebrate/*physiology ; Pigmentation ; Seawater ; Species Specificity
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 1983-08-05
    Beschreibung: After molting, stomatopods can be evicted easily from home cavities by conspecifics because these marine crustaceans lose temporarily their body armor and the use of their raptorial appendages. Some newly molted stomatopods defend their cavities with a meral spread display, a signal correlated with attack when used by animals between molts. The use of the meral spread display actually increases after molting. Since new molts cannot fight, their use of meral spread appears to be a bluff.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Steger, R -- Caldwell, R L -- New York, N.Y. -- Science. 1983 Aug 5;221(4610):558-60.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17830957" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2016-01-20
    Beschreibung: Although the Jurassic was a period of high diversity in ichthyosaurs, only a small number of specimens have been recorded from Canada to date. We describe here a new occurrence of an ophthalmosaurid ichthyosaur from a shallow marine depositional environment within the Bowser Basin of northern British Columbia. Based on vertebral diameters and the size of the humerus, the ichthyosaur was relatively large compared to other contemporaneous forms, yet possessed teeth that were small for its body size. As well, the height to length ratio of the preserved vertebrae suggests it may have had a more elongate, less regionalized body shape. Although indeterminate at a generic level, the presence of Late Jurassic ichthyosaurs in nearshore waters of northwestern North America further demonstrates their cosmopolitan distribution.
    Print ISSN: 0008-4077
    Digitale ISSN: 1480-3313
    Thema: Geologie und Paläontologie
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Journal of comparative physiology 172 (1993), S. 339-350 
    ISSN: 1432-1351
    Schlagwort(e): Photoreceptor ; Retina ; Spectral sensitivity ; Stomatopod ; Visual ecology ; Visual pigment
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract 1. We examined the retinas of 2 species of stomatopods in the superfamily Squilloidea, Cloridopsis dubia and Squilla empusa, and 2 species of the super-family Lysiosquilloidea, Coronis scolopendra and Lysiosquilla sulcata, using microspectrophotometry in the visible region of the spectrum. 2. Retinas of all species included numerous photostable pigments, such as green reflecting pigment, hemocyanin, colored oil droplets, and vesicles. Both lysiosquilloid species also had intrarhabdomal filters within specialized photoreceptors of the midband. 3. Squilloid species contained a single visual pigment throughout all photoreceptors, with peak absorption at medium wavelengths (near 515nm). Retinas of lysiosquilloids contained a diversity of visual pigments, with estimated λmax values ranging from 397 to 551 nm. 4. Spectral sensitivity functions were estimated for the lysiosquilloid species based on estimates of visual pigment λnax, photoreceptor dimensions, and specific absorbances of the visual pigments and intrarhabdomal filters. Ommatidia of midband Rows 1 to 4 contained pairs of narrowly tuned spectral receptors, appropriate for spectral discrimination, while ommatidia of midband Rows 5 and 6, and all peripheral ommatidia, had broad spectral sensitivity functions. 5. Lysiosquilloid stomatopods have retinas that closely resemble those of gonodactyloids both structurally and in their visual pigment diversity. In contrast, squilloids have retinas that are much simpler. These differences appear to be related to the habitats and activity cycles of species belonging to the 3 major superfamilies of stomatopod crustaceans.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Journal of comparative physiology 174 (1994), S. 607-619 
    ISSN: 1432-1351
    Schlagwort(e): Photoreceptor ; Retina ; Spectral sensitivity ; Stomatopoda ; Visual ecology ; Visual pigment
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract 1. We examined microspectrophotometrically the retinas of 3 species of stomatopods in the superfamily Gonodactyloidea, all of which live in environments that are reduced both in the intensity and spectral range of natural illumination. Species examined were Odontodactylus brevirostris, O. scyllarus, and Hemisquilla ensigera. 2. All 3 species had the typical gonodactyloid diversity of visual pigments, with 8 different photopigments residing in the 4 tiered rows of the midband and 2 additional types in the untiered classes of photoreceptors in the midband and peripheral retina. The spectral range covered by the λmax values of the visual pigments of each species was similar to that of other gonodactyloid and lysiosquilloid species. 3. Apparent retinal adaptations in species of Odontodactylus for vision in dimly lit, spectrally narrow photic environments were seen primarily as specializations of the intrarhabdomal filters. These were of reduced diversity, and had reduced absorption at long wavelengths compared to the filters of other gonodactyloid stomatopods. Retinas of H. ensigera lacked both proximal classes of intrarhabdomal filter, and had the smallest total range of visual pigment λmax yet observed in mantis shrimps. These modifications decrease the spectral range and number of types of narrow-band spectral classes of phooreceptors, while increasing their sensitivity.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Journal of comparative physiology 179 (1996), S. 371-384 
    ISSN: 1432-1351
    Schlagwort(e): Visual pigment ; Stomatopoda ; Visual ecology ; Evolution ; Photoreceptor ; Retina
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract 1. Interspecific diversity in the visual pigments of stomatopod crustaceans was characterized using microspectrophotometry. We examined the 10 visual pigments in main rhabdoms in retinas of 3 species of each of two genera of stomatopod crustaceans of the superfamily Gonodactyloidea, Gonodactylus (G. oerstedii, G. aloha, and G. curacaoensis) and Odontodactylus (O. scyllarus, O. brevirostris, and O. “havanensis”). Species were selected to provide a matched diversity of habitats. 2. In each genus, visual pigments varied in λmax in several regions of the retina, as revealed by analysis of variance. The variation within closely related species of the same genus implies that visual pigments can evolve rapidly in stomatopods. 3. In photoreceptors of the peripheral retina, which are devoted to spatial vision, visual pigment λmax decreased as the depth range of the various species increased, a typical pattern for marine animals. In contrast, visual pigment λmax in photoreceptors of retinal regions devoted to polarization vision (midband Rows 5 and 6) is not obviously correlated with the spectral environment, implying that polarization information may be confined to particular spectral ranges. Visual pigments of the tiered rows of the midband, which are committed to spectral analysis, span a larger spectral range in shallow-water than deepwater species.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    [s.l.] : Macmillan Magazines Ltd.
    Nature 406 (2000), S. 343-343 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Sir Biology has endured a long history of fakes, ranging from Piltdown Man to feathered dinosaurs. Often meticulously crafted, these frauds were not always easy to detect. Fortunately, technology has provided an arsenal of forensic tools that help reveal such fakery. But ...
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 428 (2004), S. 819-820 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Stomatopods (mantis shrimp) are well known for the feeding appendages they use to smash shells and impale fish. Here we show that the peacock mantis shrimp (Odontodactylus scyllarus) generates an extremely fast strike that requires major energy storage and release, which we explain in terms of ...
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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