N. Shiafkalis, A. B. Crow, Edward Howell, Robert Evans, Cyril Ramsay Jones, David Steen, John Waterfield, Miss J. Cranwell, M. S. Fletcher, J. S., John Irwin, Suzanne Szasz, Brian Dowling, A. W. Wells, Humphrey Lyttelton, Macdonald Hastings, Denzil Batchelor, R. E. Goodwin, Reginald Wilkins, Lawrence Ward, Gordon Moore, A. B. Jordan, Mary Chestertion, A Norman Collins, Robert Muller, Leslie Black, L. S. Taylor, J. Dennis, Pat Lynn,
... Supplies Ltd. Associated Warehouses Northern Novelties Ridgway Stores Tegula Floors Ltd. Bargain Distributors J. T. Lowe Ltd. ...
1953 - Gale Group | Picture Post
... rocky shores on this coast, the trochid snail Tegula funebralis. A hypothesis to explain these patterns, that ... high, regardless of latitude, the lower limit of Tegula's intertidal range was higher on the shore, ... than at northern sites. The primary predators of Tegula are octopuses (Octopus bimaculoides and O. bimaculatus), the ... range of the study. Reciprocal transplants of marked Tegula, done between several southern and northern sites, showed that the lower limit of distribution of adult Tegula on the shore at a given site is ...
Tópico(s): Marine Biology and Ecology Research
1984 - Wiley | Ecology
Margaret Rawlings, Jean Marquis, Harold Taylor, Hugh Lattimer, Paul Atkins, L. M. Du Pre, Brian Dowling, Hilde Marchant, Ernest J. Adams, Stephen Spender, C. Morgan, J. Hale, L. C. Penwill, Graham Hutton, Marcus Morris M. A., L. S. Gray, D. Phillips, Robert Muller, Archie M. Collins,
... Comments Gibbs Chlorophyll Toothpaste Parkinsons Ltd. Photo Buys Tegula Floors Ltd. Typewriter Rentals Ltd. Smartwear Ltd. Headquarter & ...
1954 - Gale Group | Picture Post
Hanno Fischer, Harald Wolf, Ansgar Büschges,
SUMMARY The tegula is a complex, knob-shaped sense organ associated with the base of the locust wing. Despite a detailed ... stroke parameters of the wing, movement of the tegula organ and the pattern of tegula activity. In this study, therefore, the kinematic parameters ... and hindwings were investigated with respect to the tegula activity pattern during tethered flight. The following results were obtained. (i) The tegula moves through a complex three-dimensional trajectory during ... its longitudinal axis. (ii) The kinematic parameters of tegula movement are phase-locked to the wing stroke ...
Tópico(s): Aerospace and Aviation Technology
2002 - The Company of Biologists | Journal of Experimental Biology
Helge P. Jacobsen, Ole B. Stabell,
... predator avoidance (climbing behaviour) of the marine snail Tegula funebralis in laboratory experiments. Snails were exposed to ... accordingly labelled by chemical cues of various origins. Tegula ‐extract alone released climbing behaviour in May, but ... cues from crabs that were actively feeding on Tegula . Crabs labelled by Tegula ‐diet, and actively feeding on Tegula , also caused more climbing responses compared to crabs ... feeding history of the predators. When snails received Tegula ‐extract combined with water conditioned with a non‐ ...
Tópico(s): Physiological and biochemical adaptations
2004 - Wiley | Oikos
... bathymetric segregation of three species of turban snails (Tegula) were examined in Monterey Bay, California. Two of the three species are abundant: Tegula brunnea occurs in shallow water (0—6 m), ... pulligo occurs in deep water (7—12 m). Tegula montereyi occurs at intermediate and deep depths but ... at the extremes of their adult ranges: juvenile Tegula brunnea occur in the low—intertidal/shallow—subtidal ... of the three species. The major predators of Tegula are benthic invertebrates and demersal fishes. Tegula have ...
Tópico(s): Coastal wetland ecosystem dynamics
1984 - Wiley | Ecology
... between two species of marine reef—dwelling gastropods, Tegula aureotincta and Tegula eiseni. Both intra— and interspecific effects were detected ... relative strengths of the interactions revealed that each Tegula species depressed the individual growth of the other ... term estimates of population densities of the two Tegula species revealed that both species fluctuated little in ... snails. However, detailed examination of the microdistribution of Tegula species indicated that they co—occurred within 0. ... The significant negative correlation in abundance of the Tegula species within the cobble reef is a pattern ...
Tópico(s): Marine Bivalve and Aquaculture Studies
1985 - Wiley | Ecology
... flight system by removal of afferents from the tegula, a mechanoreceptor organ at the base of the ... occasionally motoneurons). Two to three weeks after unilateral tegula lesion, connections between tegula afferents and flight interneurons were altered in the following way. 1) Axons from the forewing tegula on the operated side had established new synaptic ... the lesion, connectivity between axons from the forewing tegula and elevator interneurons was decreased. 3) The efficacy ... hemiganglion, sprouted across the ganglion midline after unilateral tegula removal and apparently established new synaptic contacts with ...
Tópico(s): Neural dynamics and brain function
1997 - American Physiological Society | Journal of Neurophysiology
The herbivorous gastropod Tegula funebralis is not highly ranked in a food preference hierarchy of its major predator, the starfish Pisaster ochraceus, and ... intertidal zone at Mukkaw Bay, Washington. Observations on Tegula over a 5—yr period indicate that it ... tends to migrate lower into contact with Pisaster. Tegula lays down an annual growth line permitting it ... zone. Pisaster consumes 25—28% of the adult Tegula per year in the area of spatial overlap, ... the age structure of 6—17 yr old Tegula, and by direct estimates of the percentage of ...
Tópico(s): Marine Bivalve and Aquaculture Studies
1969 - Wiley | Ecology
... migratoria, have been determined by selectively stimulating the tegula afferents while recording intracellularly from identified neurones in ... and metathoracic ganglia. Electrical stimulation of the hindwing tegula nerve (nerve ICla) revealed two groups of afferents ... these connections were monosynaptic. Stimulation of the hindwing tegula nerve also evoked excitatory postsynaptic potentials (EPSPs) in ... IPSPs in elevator motoneurones in response to hindwing tegula stimulation. This observation differs from that in Schistocerca ...
Tópico(s): Insect and Arachnid Ecology and Behavior
1988 - The Company of Biologists | Journal of Experimental Biology
The tegula, a complex sense organ associated with the wing base of the locust, plays an important role in ... accordance with previous electrophysiological results, stimulation of hindwing tegula afferents was found to reset the wingstroke to ... delayed onset of elevator motoneurone activity caused by tegula removal is accompanied by a corresponding delay in ... decrease in net lift generation was observed following tegula removal. Recordings of wing pronation indicate that this ... unfavourable downstroke position. It is concluded that the tegula of the locust hindwing signals to the nervous ...
Tópico(s): Fluid Dynamics and Turbulent Flows
1993 - The Company of Biologists | Journal of Experimental Biology
ABSTRACT The tegula, a complex sense organ associated with the wing base of the locust, plays an important role in the ... accordance with previous electrophysiological results, stimulation of hindwing tegula afferents was found to reset the wingstroke to ... delayed onset of elevator motoneurone activity caused by tegula removal is accompanied by a corresponding delay in ... decrease in net lift generation was observed following tegula removal. Recordings of wing pronation indicate that this ... unfavourable downstroke position. It is concluded that the tegula of the locust hindwing signals to the nervous ...
Tópico(s): Neurobiology and Insect Physiology Research
1993 - The Company of Biologists | Journal of Experimental Biology
... a subtidal marine community were investigated. The snails, Tegula eiseni and T. aureopincta, are patchily distributed on ... include sear urchins, crabs, and sessile bivalves; the Tegula species are less—favored prey. A positive correlation ... The two most common snail species were the Tegula congeners, which comprise 83% of the gastropod group by number. The spatial distributions of the two Tegula species are not identical. T. eiseni, but not ... are common where few predators occur. The two Tegula species are known to have defenses against predation ...
Tópico(s): Cephalopods and Marine Biology
1982 - Wiley | Ecology
Ansgar Büschges, Jan‐Marino Ramirez, Robert B. Driesang, K. G. Pearson,
... system, we investigated the pathways of the forewing tegula in intact locusts and in animals 2 weeks after hindwing tegula removal. The following physiological alterations in these pathways ... In the intact locusts, the connections of forewing tegula afferents to flight interneurons are variable but this ... recovered animals, and (2) larger numbers of forewing tegula afferents connect to interneurons that excite elevator motoneurons ( ... excitatory postsynaptic potentials (EPSPs) evoked by single forewing tegula afferents was found not to be altered in ...
Tópico(s): Amphibian and Reptile Biology
1992 - Wiley | Journal of Neurobiology
The gastropod Tegula funebralis (A. Adams, 1855) is confined to the intertidal. At Mukkaw Bay, Washington, it typically occurs in patches ... observation on the natural population suggest the following: Tegula spawns once per year; the dry weight‐shell ... of 4.9%. Other efficiencies are discussed. In Tegula , 60% of energy transferred to other levels is ... Comparison of the rate of annual consumption by Tegula, 1,071 kcal m − 2 yr −1 , and ...
Tópico(s): Marine and fisheries research
1971 - Wiley | Limnology and Oceanography
Lloyd F. Lowry, ALFRED J. McELROY, John S. Pearse,
... of common macroalgae, 876 snails were collected.2. Tegula brunnea was found primarily on Macrocystis pyrifera. Tegula montereyi and T. pulligo were fairly evenly distributed ... genus combinations.3. An analysis of populations of Tegula spp. on Macrocystis showed differences in species compositions at different heights on the plants. Tegula pulligo was relatively most common at the bottoms ... the plants and least common in the canopy. Tegula brunnea showed the reverse trend.4. A comparison ...
Tópico(s): Soil and Water Nutrient Dynamics
1974 - Marine Biological Laboratory (MBL) | Biological Bulletin
Gonzalo A. Collado, Carmen Espoz, Marco A. Méndez, Donald I. Brown,
... the spermatozoon of seven South American species of Tegula using light and transmission electron microscopy. In all ... part of their reproductive strategy. The spermatozoon of Tegula, from anterior to posterior, are composed of: (a) ... of the acrosome and the nucleus of the Tegula species studied here, as well as those previously ... could be potentially useful for recognizing subgenera within Tegula. The comparative study showed that some characters of ...
Tópico(s): Aquatic Invertebrate Ecology and Behavior
2008 - Taylor & Francis | Invertebrate Reproduction & Development
Sally E. Walker, James T. Carlton,
... fossil record of the Pleistocene rocky shore gastropod Tegula funebralis appears to be no exception to this ... resource for these gastropods: (1) the predilection for Tegula shells by the intertidal hermit crab, Pagurus samuelis, ... the shells, (2) hermit crab-occupied shells of Tegula have a distinct array of bionts distinguishable from ... these taphonomic losses, the Pleistocene fossil record of Tegula retains a good record of the biological factors ...
Tópico(s): Crustacean biology and ecology
1995 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology
... locust Schistocerca gregaria, we investigated the consequences of tegula ablation on free flight parameters including motor patterns ( ... aerodynamic output. We investigated the role of the tegula pairs of both wings on the motor pattern ... in free-flying locusts. We show that the tegula organs are not essential for generating the motor ... term changes in the free flight parameters after tegula ablation. The recovery of the adult flight system ...
Tópico(s): Aerospace and Aviation Technology
1999 - The Company of Biologists | Journal of Experimental Biology
Peter H. Doering, David Phillips,
The intertidal gastropod, Tegula funebralis (A. Adams) exhibits a shore-level size gradient with mean shell size increasing in a down-shore direction. ... important factor in the formation and maintenance of Tegula's shore-level size gradient. In response to ... predation may select for a size gradient in Tegula funebralis, it is unlikely that responses to predatory ...
Tópico(s): Marine Bivalve and Aquaculture Studies
1983 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
... on the feeding behavior of the intertidal gastropod Tegula funebralis and other marine herbivores. The effects of ... seem important in determining overall feeding preferences of Tegula, but may have affected choices between algae that ... in phenolics. I suggest that feeding preferences of Tegula funebralis for brown algae are primarily due to ...
Tópico(s): Marine Biology and Environmental Chemistry
1985 - Wiley | Ecological Monographs
... coastline shape correlate with age-structure of Chlorostoma (Tegula) funebralis populations Erin E. Cooper*, Alan L. Shanks ... from 22 populations of the intertidal snail Chlorostoma (Tegula) funebralis were studied to determine the effects of ... coastline shape correlate with age-structure of Chlorostoma (Tegula) funebralis populations. Mar Ecol Prog Ser 424:133- ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2011 - Inter-Research | Marine Ecology Progress Series
Michael E. Hellberg, Alice B. Dennis, Patricia Arbour-Reily, Jan Aagaard, Willie J. Swanson,
... the vitelline envelope receptor for lysin (VERL) from Tegula, a genus of free-spawning marine snails. Like VERL from abalone, Tegula VERL is a major component of the VE ... occurs in a tandem array of 22 repeats, Tegula VERL has just one such domain. Interspecific comparisons ...
Tópico(s): Aquaculture Nutrition and Growth
2011 - Oxford University Press | Evolution
Gonzalo A. Collado, Marco A. Méndez, Donald I. Brown, Jorge Pérez-Schultheiss,
The original description of Tegula ignota was based on three shells found on the coast of Totoralillo Sur, northern Chile. Until now, there are no ... that T. ignota is most closely related to Tegula atra than other Chilean species of Tegula. Voucher specimens of T. ignota were deposited in ...
Tópico(s): Cephalopods and Marine Biology
2012 - Cambridge University Press | Journal of the Marine Biological Association of the United Kingdom
Jan‐Marino Ramirez, K. G. Pearson,
... elements in transmitting proprioceptive information from the hindwing tegula to wing elevator motoneurons. 2. Offset currents injected ... the intact flying animal by synaptic input from tegula afferents (n = 10). These bursts lead to an ... animal. In the absence of flight, stimulation of tegula afferents never evoked bursts in interneuron 566 (n = ... found for interneuron 567. In the quiescent animal, tegula-evoked compound excitatory postsynaptic potentials were not sufficient ...
Tópico(s): Neural dynamics and brain function
1993 - American Physiological Society | Journal of Neurophysiology
... sensitive, low-intertidal to subtidal zone turban snails, Tegula brunnea and T. montereyi, in comparison to a ... iii)to compare this effect among the three Tegula congeners. After increasing acclimation temperature from 13°C ... synthesis of several 77 kDa proteins. Thus, in Tegula, the effect of acclimation on Hsp expression is ( ...
Tópico(s): Genetics, Aging, and Longevity in Model Organisms
2005 - The Company of Biologists | Journal of Experimental Biology
... weight-matched shells of Olivella biplicata (Sowerby) and Tegula funebralis (Adams), it was significantly more likely to ... Pagurus samuelis, with Pagurus samuelis using almost exclusively Tegula funebralis and Pagurus granosimanus using Olivella biplicata and Tegula funebralis at one site while using Tegula brunnea (Philippi) at another site. It was also ...
Tópico(s): Marine Bivalve and Aquaculture Studies
1996 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
Lars Tomanek, George N. Somero,
... of protein synthesis in congeneric marine snails (genus Tegula) that occur at different heights along the subtidal ... kDa. In the low‐ to mid‐intertidal species, Tegula funebralis, whose body temperature frequently exceeds 30°C ... contrast, in the low‐intertidal to subtidal species, Tegula brunnea, for which 2.5 h at 30° ...
Tópico(s): Genetics, Aging, and Longevity in Model Organisms
2000 - University of Chicago Press | Physiological and Biochemical Zoology
... weight-matched shells of Olivella biplicata (Sowerby) and Tegula funebralis (Adams), it was significantly more likely to ... Pagurus samuelis, with Pagurus samuelis using almost exclusively Tegula funebralis and Pagurus granosimanus using Olivella biplicata and Tegula funebralis at one site while using Tegula brunnea (Philippi) at another site. It was also ...
Tópico(s): Marine Biology and Ecology Research
1998 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
Daishi Yamazaki, Takahiro Hirano, Shota Uchida, Osamu Miura, Satoshi Chiba,
... East Asian members of the marine gastropod genus Tegula. We also investigated the geographical and genetic patterns ... shell-colour morphotypes (black vs light brown) in Tegula xanthostigma. We sequenced the mitochondrial cytochrome c oxidase ... reliable character to use for species delimitation in Tegula, they suggest that differences in habitat preferences may ...
Tópico(s): Aquatic Invertebrate Ecology and Behavior
2018 - Oxford University Press | Journal of Molluscan Studies