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Journal articles on the topic 'Diving within'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Smith, Keith T. "Diving within Saturn's rings." Science 362, no. 6410 (2018): 44–45. http://dx.doi.org/10.1126/science.aav4175.

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Dinsmore, David A. "The History of Diving within the National Oceanic and Atmospheric Administration (NOAA)." Marine Technology Society Journal 34, no. 4 (2000): 11–22. http://dx.doi.org/10.4031/mtsj.34.4.3.

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As the nation’s premiere ocean science agency, the National Oceanic and Atmospheric Administration (NOAA) has a variety of programs that require research below the ocean’s surface. This research is conducted using a variety of diving methodologies, including wet diving, seafloor habitats, remotely operated vehicles, and manned submersibles. For almost fifty years NOAA and its predecessors, the Bureau of Commercial Fisheries and the Coast and Geodetic Survey, have been actively involved in undersea research. Many of the lessons learned and technologies developed during this time have been adopt

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3

Mphaphuli, Memory, and Gabriele Griffin. "“Ducking, diving and playing along”." Qualitative Research Journal 20, no. 1 (2019): 34–48. http://dx.doi.org/10.1108/qrj-03-2019-0029.

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Purpose The purpose of this paper is to explore the fieldwork dilemmas a young, female, heterosexual, indigenous South African researching everyday negotiations around heterosexuality within township families encountered in negotiating her own heteroerotic subjectivity within the field. Design/methodology/approach A heterosexuality studies approach is here combined with a critical feminist research methodological perspective. Findings The paper argues that researchers are often unprepared for having to negotiate their erotic subjectivity within the field and that such negotiations can be compr

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4

Roche, Ronan C., Chloe V. Harvey, James J. Harvey, et al. "Recreational Diving Impacts on Coral Reefs and the Adoption of Environmentally Responsible Practices within the SCUBA Diving Industry." Environmental Management 58, no. 1 (2016): 107–16. http://dx.doi.org/10.1007/s00267-016-0696-0.

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5

Masello, Juan F., Roger Mundry, Maud Poisbleau, et al. "Diving seabirds share foraging space and time within and among species." Ecosphere 1, no. 6 (2010): art19. http://dx.doi.org/10.1890/es10-00103.1.

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6

Hodeck, Alexander, Jacqueline Tuchel, Luisa Hente, and Christine von Reibnitz. "The Importance of Sustainability in Diving Tourism—The Case of German Speaking Diving Tourists." Sustainability 13, no. 11 (2021): 6485. http://dx.doi.org/10.3390/su13116485.

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Sustainability in sports tourism has increased in recent years. Sustainability is a particular focus for diving tourism. This paper analyses the meaning of sustainability to German speaking diving tourists to draw conclusions for the development of tourism strategies. Based on a literature review on the importance of sustainability in diving tourism, an empirical study was designed to understand the importance of the topic within the target group. A total of 174 German-speaking diving tourists were surveyed using an online-questionnaire. The subjects were clustered regarding their sustainable

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Rona, Peter A. "Deep-Diving Manned Research Submersibles." Marine Technology Society Journal 33, no. 4 (1999): 13–25. http://dx.doi.org/10.4031/mtsj.33.4.3.

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The global fleet of deep-diving manned research submersibles comprises thirteen human occupied vehicles (HOV), eleven of which are presently operational, managed by different agencies in France, Japan, Russia and the United States. The basic components of these submersibles are similar, but significant differences exist in capabilities and operational styles. The most efficient and effective use of deep-diving HOV’s is as the final tool after the dive target has been located by a systematic search procedure of closing range using ships and unmanned vehicles (towed, ROV, or AUV) as platforms fo

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8

Torrence, S. M., and M. G. Butler. "Spatial structure of a diving duck (Aythya, Oxyura) guild: how does habitat structure and competition influence diving duck habitat use within northern prairie wetlands?" Canadian Journal of Zoology 84, no. 9 (2006): 1358–67. http://dx.doi.org/10.1139/z06-121.

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What circumstances allow the coexistence of similar species is a common but complex question in community ecology. It is often assumed that sympatric species within the same guild must employ some mechanism of niche diversification to coexist. Diving duck (Anatidae: Aythya Boie, 1822 and Oxyura Bonaparte, 1828) competition is poorly understood and current evidence of coexistence mechanisms is contradictory. In the spring and summer of 2001 and 2002, we tested whether diving ducks foraging within prairie potholes segregate by depth to avoid competition. We sought to explain any segregation by s

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Castellini, M. A., G. L. Kooyman, and P. J. Ponganis. "Metabolic rates of freely diving Weddell seals: correlations with oxygen stores, swim velocity and diving duration." Journal of Experimental Biology 165, no. 1 (1992): 181–94. http://dx.doi.org/10.1242/jeb.165.1.181.

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The metabolic rates of freely diving Weddell seals were measured using modern methods of on-line computer analysis coupled to oxygen consumption instrumentation. Oxygen consumption values were collected during sleep, resting periods while awake and during diving periods with the seals breathing at the surface of the water in an experimental sea-ice hole in Antarctica. Oxygen consumption during diving was not elevated over resting values but was statistically about 1.5 times greater than sleeping values. The metabolic rate of diving declined with increasing dive duration, but there was no signi

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Boyd, I. L., and J. P. Croxall. "Diving behaviour of lactating Antarctic fur seals." Canadian Journal of Zoology 70, no. 5 (1992): 919–28. http://dx.doi.org/10.1139/z92-131.

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The diving behaviour of 11 lactating female Antarctic fur seals (Arctocephalus gazella) was recorded for a total of 254 animal-days at sea. Median and maximum dive depths for individuals varied from 8 to 19 m and from 82 to 181 m, respectively, and median and maximum dive durations from 0.75 to 1.17 min and from 2.8–10.0 min, respectively. Theoretical aerobic diving limits were exceeded on < 1% of dives. Dives were mainly V-shaped. Sixty percent of dives were to less than 20 m depth, and these dives were distinguished from deep dives (> 20 m) by having slower rates of descent and ascent

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11

Coleman, Brendan, and F. Michael Davis. "Dysbaric osteonecrosis in technical divers: The new ‘at-risk’ group?" Diving and Hyperbaric Medicine Journal 50, no. 3 (2020): 295–99. http://dx.doi.org/10.28920/dhm50.3.295-299.

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Introduction: Dysbaric osteonecrosis (DON) in people working under increased atmospheric pressure is well documented. It is generally less common in military and commercial divers than in caisson workers, except in some high-risk groups, such as in many indigenous diving industries where workers have little or no understanding of decompression principles. With the increasing popularity within the recreational diving community of deep air and mixed-gas decompression diving (‘technical diving’), it is likely that diving physicians may see an increase in the prevalence of DON in this group in the

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12

Schreer, Jason F., and Kit M. Kovacs. "Allometry of diving capacity in air-breathing vertebrates." Canadian Journal of Zoology 75, no. 3 (1997): 339–58. http://dx.doi.org/10.1139/z97-044.

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Maximum diving depths and durations were examined in relation to body mass for birds, marine mammals, and marine turtles. There were strong allometric relationships between these parameters (log10 transformed) among air-breathing vertebrates (r = 0.71, n = 111 for depth; r = 0.84, n = 121 for duration), although there was considerable scatter around the regression lines. Many of the smaller taxonomic groups also had a strong allometric relationship between diving capacity (maximum depth and duration) and body mass. Notable exceptions were mysticete cetaceans and diving/flying birds, which disp

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13

Barak, Otto F., Nebojsa Janjic, Ivan Drvis, et al. "Vascular dysfunction following breath-hold diving." Canadian Journal of Physiology and Pharmacology 98, no. 2 (2020): 124–30. http://dx.doi.org/10.1139/cjpp-2019-0341.

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The pathogenesis of predominantly neurological decompression sickness (DCS) is multifactorial. In SCUBA diving, besides gas bubbles, DCS has been linked to microparticle release, impaired endothelial function, and platelet activation. This study focused on vascular damage and its potential role in the genesis of DCS in breath-hold diving. Eleven breath-hold divers participated in a field study comprising eight deep breath-hold dives with short surface periods and repetitive breath-hold dives lasting for 6 h. Endothelium-dependent vasodilation of the brachial artery, via flow-mediated dilation

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Nocera, Joseph J., and Neil M. Burgess. "Diving schedules of Common Loons in varying environments." Canadian Journal of Zoology 80, no. 9 (2002): 1643–48. http://dx.doi.org/10.1139/z02-157.

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Many species of diving birds adjust their foraging behaviour in response to variation in their environment. The Common Loon (Gavia immer) is a visually oriented predator sensitive to environmental variation, yet little is known about the flexibility of its diving behaviour. We tested the hypothesis that loons adjust their diving schedules by increasing or decreasing the dive duration during foraging bouts to accommodate environmental variation during the breeding season. The dive duration and dive-pause components of the loon dive cycle did not vary among lakes with different lake chemistry, l

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Lea, Mary-Anne, and Laurent Dubroca. "Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean." ICES Journal of Marine Science 60, no. 5 (2003): 990–1002. http://dx.doi.org/10.1016/s1054-3139(03)00101-2.

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AbstractDiving activity, foraging locations and pup provisioning behaviour of 10 female Antarctic fur seals (Arctocephalus gazella) were examined with respect to a range of oceanographic parameters (sea surface temperature, chlorophyll distribution and bathymetry) at the Kerguelen Archipelago in the southern Indian Ocean in February 2000. A multivariate analysis of the environmental parameters at each of the nightly foraging locations indicated the existence of two ecoregions within the foraging range of the seals. Five seals actively foraged in oceanic waters (1870 m) with relatively warm sur

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Weitzner, Emma L., Cornelia E. Fanter, and Allyson G. Hindle. "Pinniped Ontogeny as a Window into the Comparative Physiology and Genomics of Hypoxia Tolerance." Integrative and Comparative Biology 60, no. 6 (2020): 1414–24. http://dx.doi.org/10.1093/icb/icaa083.

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Synopsis Diving physiology has received considerable scientific attention as it is a central element of the extreme phenotype of marine mammals. Many scientific discoveries have illuminated physiological mechanisms supporting diving, such as massive, internally bound oxygen stores and dramatic cardiovascular regulation. However, the cellular and molecular mechanisms that support the diving phenotype remain mostly unexplored as logistic and legal restrictions limit the extent of scientific manipulation possible. With next-generation sequencing (NGS) tools becoming more widespread and cost-effec

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Cunningham, Gregory B., Richard W. Van Buskirk, Mark J. Hodges, and Gabrielle A. Nevitt. "Responses of common diving petrel chicks (Pelecanoides urinatrix) to burrow and colony specific odours in a simple wind tunnel." Antarctic Science 24, no. 4 (2012): 337–41. http://dx.doi.org/10.1017/s0954102012000168.

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AbstractResearchers have previously assumed that common diving petrels (Pelecanoides urinatrix) have a limited sense of smell since they have relatively small olfactory bulbs. A recent study, however, showed that adult diving petrels prefer the scent of their own burrow compared to burrows of other diving petrels, implying that personal scents contribute to the burrow's odour signature. Because diving petrels appear to be adapted to use olfaction in social contexts, they could be a useful model for investigating how chemically mediated social recognition develops in birds. A first step is to d

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Walker, Brian G., and P. Dee Boersma. "Diving behavior of Magellanic penguins (Spheniscus magellanicus) at Punta Tombo, Argentina." Canadian Journal of Zoology 81, no. 9 (2003): 1471–83. http://dx.doi.org/10.1139/z03-142.

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Geographic and temporal variability in the marine environment affects seabirds' ability to find food. Similarly, an individual's body size or condition may influence their ability to capture prey. We examined the diving behavior of Magellanic penguins (Spheniscus magellanicus) at Punta Tombo, Argentina, as an indicator of variation in foraging ability. We studied how body size affected diving capability and how diving varies among years and within breeding seasons. We also compared diving patterns of Magellanic penguins at Punta Tombo with those of birds in two colonies at the opposite end of

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Lombardi, Michael, Winslow Burleson, Jeff Godfrey, and Richard Fryburg. "An Experimental Deployment of a Portable Inflatable Habitat in Open Water to Augment Lengthy In-Water Decompression by Scientific Divers." Marine Technology Society Journal 47, no. 6 (2013): 52–63. http://dx.doi.org/10.4031/mtsj.47.6.4.

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AbstractUndersea living in the science community has effectively risen and fallen within the last half century. The paradigm of residing on the seafloor within a fixed, permanent structure, while body tissues are saturated with inert breathing gasses, provides for extended-duration excursions from such a structure, although limits geographical productivity to within reasonable proximity of the habitat structure itself. Saturation diving exploration with science motives provided an exciting opportunity during the 1960s and 1970s, with timing lending itself well to providing a sea-to-space analo

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Gao, Yongfeng, Mengjiao Cheng, Baoling Wang, Zeguo Feng, and Feng Shi. "Diving-Surfacing Cycle Within a Stimulus-responsive Smart Device Towards Developing Functionally Cooperating Systems." Advanced Materials 22, no. 45 (2010): 5125–28. http://dx.doi.org/10.1002/adma.201001577.

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21

Andersen, Julie M., Mette Skern-Mauritzen, Lars Boehme, et al. "Investigating Annual Diving Behaviour by Hooded Seals (Cystophora cristata) within the Northwest Atlantic Ocean." PLoS ONE 8, no. 11 (2013): e80438. http://dx.doi.org/10.1371/journal.pone.0080438.

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22

Signore, P. E., and D. R. Jones. "Effect of pharmacological blockade on cardiovascular responses to voluntary and forced diving in muskrats." Journal of Experimental Biology 198, no. 11 (1995): 2307–15. http://dx.doi.org/10.1242/jeb.198.11.2307.

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Neural control of free and forced diving bradycardia and peripheral resistance was studied in the muskrat (Ondatra zibethicus) by means of acute pharmacological blockade with the muscarinic blocker atropine, the alpha-adrenergic blocker phentolamine and the beta-adrenergic blockers nadolol and propranolol. Saline injection was used as a control. Heart rate in control animals increased before voluntary dives and dropped markedly as soon as the animals submerged. Heart rate started increasing towards the end of voluntary dives and reached pre-dive values within the first 5 s of recovery. Pre-div

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Kłos, Ryszard. "Deep Diving with the Use of a Crabe Rebreather." Polish Hyperbaric Research 51, no. 2 (2015): 11–24. http://dx.doi.org/10.1515/phr-2015-0008.

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Abstract The article provides the results of 31 experimental dives carried out within the depth range of H ∈ [60; 80] mH2O. A combined mathematical model for ventilation and decompression was proposed with the possibility of an emergency omission of the last station at 3 mH2O and decompression completion at 6 mH2O in the event of a deterioration in weather conditions.

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BEVAN, R. M., and P. J. BUTLER. "Cardiac Output And Blood Flow Distribution During Swimming and Voluntary Diving of the Tufted Duck (AYthya FUligula)." Journal of Experimental Biology 168, no. 1 (1992): 199–217. http://dx.doi.org/10.1242/jeb.168.1.199.

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Cardiac output (Vb) and blood flow distribution were continuously measured in the tufted duck when diving voluntarily. Blood flows through pulmonary, ischiadic, carotid and brachiocephalic arteries were recorded using miniature pulsed Doppler flow probes. By measuring these flows, cardiac output and blood flow to the leg muscles and to the flight muscles could be calculated. Heart rate and Vb were well correlated, making the former a very good indicator of any changes in the latter. Blood flow to the leg muscles increased substantially during both swimming and diving to five times the resting

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Degeratu, Mircea, Simona Rus, and Ana Ion. "Optimization Of Diving With “Nitrox” Over-Oxygenated Breathing Mixtures, To Depths Of 15 ÷ 50 Metres." International conference KNOWLEDGE-BASED ORGANIZATION 21, no. 3 (2015): 666–72. http://dx.doi.org/10.1515/kbo-2015-0113.

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Abstract The efficiency of diving activities carried out by divers should be increased. Improving the efficiency of interventions made with divers at depths greater than 15m has brought into focus the problem of increasing underwater working time by using over-oxygenated synthetic breathing mixtures in order to optimize the relation between working time and duration of decompression. The “NITROX” binary mixture best meets the requirements of diving at depths within the range of 15 to 50 meters. NITROX is used for depths in the range of 15 to 50 m. When this mixture is used, the decompression t

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Bengtson, John L., Donald A. Croll, and Michael E. Goebel. "Diving behaviour of chinstrap penguins at Seal Island." Antarctic Science 5, no. 1 (1993): 9–15. http://dx.doi.org/10.1017/s0954102093000033.

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Diving behaviour of chinstrap penguins (Pygoscelis antarctica) was studied in four adults brooding chicks on Seal Island, South Shetland Islands, Antarctica. During foraging trips to sea, chinstrap penguins made shallow, short duration dives almost continuously, for the most part within 50 m of the surface. Diving effort was concentrated during the daylight hours (10h00-15h00), although a second peak in effort was seen around midnight (22h00-02h00). These peaks were possibly due to the constraints of visual location of prey, chick provisioning, or the need to take advantage of diurnal changes

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Guillemette, Magella, Anthony J. Woakes, Viviane Henaux, Jean-Marc Grandbois, and Patrick J. Butler. "The effect of depth on the diving behaviour of common eiders." Canadian Journal of Zoology 82, no. 11 (2004): 1818–26. http://dx.doi.org/10.1139/z04-180.

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Diving in endotherms is largely constrained by the depth of the foraging area, as they withstand long periods without breathing. Foraging theory predicts that all phases of a dive cycle, including travel, bottom, and surface durations, are positively correlated with depth. With continued increase in depth, bottom duration should level off and then decline. We tested these qualitative predictions with common eiders (Somateria mollissima (L., 1758)), a sea duck foraging routinely on the bottom. Using data loggers implanted in the body cavity of four females for 1 year, we showed that average div

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Burggren, Warren. "Cardiovascular responses to diving and their relation to lung and blood oxygen stores in vertebrates." Canadian Journal of Zoology 66, no. 1 (1988): 20–28. http://dx.doi.org/10.1139/z88-003.

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Air-breathing vertebrates generally respond to apnea during diving by adjusting cardiovascular performance (e.g., bradycardia, selective increases in peripheral resistance, reduction and redistribution of cardiac output). In mammals, and to a lesser extent in birds, the major O2 stores at the beginning of a dive reside within blood and tissues rather than in lung gas. Consequently, there is limited respiratory benefit during apnea in either maintaining or transiently restoring extensive lung perfusion to predive levels, and so cardiac output (and thus lung perfusion) remains low during the div

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Ljubkovic, Marko, Svein Erik Gaustad, Jasna Marinovic, et al. "Ultrasonic evidence of acute interstitial lung edema after SCUBA diving is resolved within 2–3h." Respiratory Physiology & Neurobiology 171, no. 2 (2010): 165–70. http://dx.doi.org/10.1016/j.resp.2010.02.008.

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Fliedner, Moritz M., and Robert S. White. "Seismic structure of basalt flows from surface seismic data, borehole measurements, and synthetic seismogram modeling." GEOPHYSICS 66, no. 6 (2001): 1925–36. http://dx.doi.org/10.1190/1.1486760.

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We use the wide‐angle wavefield to constrain estimates of the seismic velocity and thickness of basalt flows overlying sediments. Wide angle means the seismic wavefield recorded at offsets beyond the emergence of the direct wave. This wide‐angle wavefield contains arrivals that are returned from within and below the basalt flows, including the diving wave through the basalts as the first arrival and P‐wave reflections from the base of the basalts and from subbasalt structures. The velocity structure of basalt flows can be determined to first order from traveltime information by ray tracing the

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Culik, B. M., K. Pütz, R. P. Wilson, et al. "Diving energetics in king penguins (Aptenodytes patagonicus)." Journal of Experimental Biology 199, no. 4 (1996): 973–83. http://dx.doi.org/10.1242/jeb.199.4.973.

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Dive duration in wild king penguins and the energetic cost of swimming in a 30m long swim channel were determined at Ile de la Possession, Crozet Archipelago, using external data loggers and respirometry, respectively. Calibrated electronic data loggers equipped with a pressure sensor were used to determine dive durations: 95% of dives were less than 6 min long and 66% of dives were less than 4 min long. Dive patterns show that king penguins may intersperse long dive durations (4-6.3 min) with short ones (1.5-3 min) and make surface pauses of variable duration between them (0.5-3.5 min), or di

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Rozloznik, Miroslav, Julian F. R. Paton, and Mathias Dutschmann. "Repetitive paired stimulation of nasotrigeminal and peripheral chemoreceptor afferents cause progressive potentiation of the diving bradycardia." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 296, no. 1 (2009): R80—R87. http://dx.doi.org/10.1152/ajpregu.00806.2007.

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Hallmarks of the mammalian diving response are protective apnea and bradycardia. These cardiorespiratory adaptations can be mimicked by stimulation of the trigeminal ethmoidal nerve (EN5) and reflect oxygen-conserving mechanisms during breath-hold dives. Increasing drive from peripheral chemoreceptors during sustained dives was reported to enhance the diving bradycardia. The underlying neuronal mechanisms, however, are unknown. In the present study, expression and plasticity of EN5-bradycardias after paired stimulation of the EN5 and peripheral chemoreceptors was investigated in the in situ wo

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Aygün, Yalin, and Göktuğ Norman. "Beneath the Waves: Experiences of Beginner SCUBA Divers and Sensorium." Pakistan Journal of Medical and Health Sciences 15, no. 5 (2021): 1666–72. http://dx.doi.org/10.53350/pjmhs211551666.

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Background: The experience of Recreational SCUBA Diving (RSD) is unique and exciting because participants can feel innermost and special sensations. Aim: By exploring the role of the senses in RSD This paper seeks to illustrate the complex, kaleidoscopic and inter-relational connections beginner SCUBA divers make with aquatic environment within the sensorium experience for the first time. Methods: The present research draws upon the qualitative inquiry away from the positivist approaches to capture insider views, meanings, and interpretations. Audio-recorded semi-structured interviews with a c

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Watanuki, Yutaka, Akiko Kato, and Yasuhiko Naito. "Diving performance of male and female Japanese Cormorants." Canadian Journal of Zoology 74, no. 6 (1996): 1098–109. http://dx.doi.org/10.1139/z96-122.

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Sexual differences in the diving behavior of the sexually dimorphic Japanese Cormorant, Phalacrocorax capillatus (males are 26% heavier than females), were studied at Teuri Island, Hokkaido, using time–depth recorders. A typical dive cycle involved a rapid descent phase, a bottom phase where they remained for a while, an ascent phase, and a postdive surface phase. Depth and duration across individual birds were greater for males (15.1 ± 3.7 (mean ± SD) m, 37 ± 5 s, respectively) than those for females (7.2 ± 2.4 m, 24 ± 4 s, respectively). While submerged, females spent a similar proportion of

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Shahnavazi, Maryam, Behzad Salari, and Reza Fekrazad. "The Effect of Scuba Diving on Microleakage of a Class II Composite Restoration: An In-Vitro Study." Healthcare 9, no. 6 (2021): 768. http://dx.doi.org/10.3390/healthcare9060768.

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Persistent pressure change is a common phenomenon within scuba diving with various medical and dental sign side effects. This study evaluates the effect of simulated pressure change due to scuba diving on the microleakage of class II composite restoration. In our methodology, a total number of 150 intact bicuspids are divided into two main groups (A and B), and prepared for a class II composite restoration. The samples of each main group are divided into five subgroups to be prepared with different liners. Then samples are restored with the same resin composite material. The teeth in group A a

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Parell, G. Joseph, and Gary D. Becker. "Conservative Management of Inner Ear Barotrauma Resulting from Scuba Diving." Otolaryngology–Head and Neck Surgery 93, no. 3 (1985): 393–97. http://dx.doi.org/10.1177/019459988509300320.

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Fourteen patients who experienced inner ear barotrauma (IEBT) while scuba diving were examined shortly after the episode and were followed up until symptoms resolved or stabilized. On the basis of these observations and a review of the literature, three types of IEBT are hypothesized that usually result from forceful autoinflation of the middle ear: (1) hemorrhage within the inner ear, (2) labyrinthine membrane tear, and (3) perilymph fistula through the round or oval window. Presenting symptoms, treatment regimens, and final results are detailed.

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Sobolev, A. S. "The Delivery of Biologically Active Agents into the Nuclei of Target Cells for the Purposes of Translational Medicine." Acta Naturae 12, no. 4 (2020): 47–56. http://dx.doi.org/10.32607/actanaturae.11049.

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Development of vehicles for the subcellular targeted delivery of biologically active agents is very promising for the purposes of translational medicine. This review summarizes the results obtained by researchers from the Laboratory of Molecular Genetics of Intracellular Transport, Institute of Gene Biology RAS, which allowed them to design the core technology: modular nanotransporters. This approach ensures high efficacy and cell specificity for different anti-cancer agents, as they are delivered into the most vulnerable subcellular compartment within the cells of interest and makes it possib

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Furilla, R. A., and D. R. Jones. "The contribution of nasal receptors to the cardiac response to diving in restrained and unrestrained redhead ducks (Aythya americana)." Journal of Experimental Biology 121, no. 1 (1986): 227–38. http://dx.doi.org/10.1242/jeb.121.1.227.

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In restrained redhead ducks, forced submergence caused heart rate to fall from 100 +/− 3 beats min-1 (mean +/− S.E.M., N = 12) to a stable underwater rate of 35 +/− 4 beats min-1 (N = 12) within 5 s after submergence. Bradycardia was unaffected by breathing oxygen before a dive, but was virtually eliminated by local anaesthesia of the narial region. In contrast, in a dabbling duck (Anas platyrhynchos) bradycardia in short dives was eliminated by breathing oxygen before a dive. In unrestrained diving, on a man-made pond, heart rate in redheads diving voluntarily (y) was related to pre-dive hear

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Lemon, Laura L. "Diving deeper into shared meaning-making: Exploring the zones of engagement within a single case study." Public Relations Review 45, no. 4 (2019): 101834. http://dx.doi.org/10.1016/j.pubrev.2019.101834.

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Jones, David R., R. A. Furilla, M. R. A. Heieis, G. R. J. Gabbott, and F. M. Smith. "Forced and voluntary diving in ducks: cardiovascular adjustments and their control." Canadian Journal of Zoology 66, no. 1 (1988): 75–83. http://dx.doi.org/10.1139/z88-010.

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Diving ducks submerge voluntarily for less than 1 min yet, in forced dives in the laboratory, redhead ducks can endure at least 8 min underwater. This is much longer than a dabbling duck of the same body mass can endure and is a result of the quicker onset of oxygen-conserving cardiovascular responses in divers. Oxygen conservation during forced dives is indicated by a profound bradycardia as blood flow is restricted to cerebral and central cardiovascular areas. In voluntary dives, on the other hand, heart rate is frequently above resting rates, and blood flow is preferentially directed to the

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Peterson, Sarah H., Joshua T. Ackerman, and Daniel P. Costa. "Marine foraging ecology influences mercury bioaccumulation in deep-diving northern elephant seals." Proceedings of the Royal Society B: Biological Sciences 282, no. 1810 (2015): 20150710. http://dx.doi.org/10.1098/rspb.2015.0710.

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Mercury contamination of oceans is prevalent worldwide and methylmercury concentrations in the mesopelagic zone (200–1000 m) are increasing more rapidly than in surface waters. Yet mercury bioaccumulation in mesopelagic predators has been understudied. Northern elephant seals ( Mirounga angustirostris ) biannually travel thousands of kilometres to forage within coastal and open-ocean regions of the northeast Pacific Ocean. We coupled satellite telemetry, diving behaviour and stable isotopes (carbon and nitrogen) from 77 adult females, and showed that variability among individuals in foraging l

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Lacroix, Deborah L., Richard B. Lanctot, John A. Reed, and Trent L. McDonald. "Effect of underwater seismic surveys on molting male Long-tailed Ducks in the Beaufort Sea, Alaska." Canadian Journal of Zoology 81, no. 11 (2003): 1862–75. http://dx.doi.org/10.1139/z03-185.

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Large numbers of Long-tailed Ducks (Clangula hyemalis) (10 000 – 30 000) undergo a postnuptial wing molt along barrier islands of the Beaufort Sea, Alaska. To investigate the potential effects of underwater seismic activities on this species, we monitored the number and diving behavior of molting Long-tailed Ducks before, during, and after seismic activities in a seismic area and two control areas nearby between July and September 2001. Aerial surveys documented a decline in duck numbers in both seismic and control areas during the period of seismic activity. We used automated data-collection

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McCafferty, D. J., I. L. Boyd, and R. I. Taylor. "Diving behaviour of Antarctic fur seal (Arctocephalus gazella) pups." Canadian Journal of Zoology 76, no. 3 (1998): 513–20. http://dx.doi.org/10.1139/z97-219.

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The diving behaviour of Antarctic fur seal (Arctocephalus gazella) pups on Bird Island, South Georgia (54°S, 38°W), was examined during February-April 1996 using capillary-tube depth gauges (CDGs) and time-depth recorders (TDRs). CDGs were deployed on 6 female and 10 male pups aged 65-101 days. Depths measured by CDGs were within 10% of maximum depths recorded by TDRs. Maximum dive depths averaged 13.8 m and ranged from 4.2 to 28.1 m. Body length alone accounted for 66% of the total variation in maximum dive depth. TDRs were deployed on one female and two male pups aged 89-101 days. In total,

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Stephenson, R. "DIVING ENERGETICS IN LESSER SCAUP (AYTHYTA AFFINIS, EYTON)." Journal of Experimental Biology 190, no. 1 (1994): 155–78. http://dx.doi.org/10.1242/jeb.190.1.155.

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Mechanical and aerobic energy costs of diving were measured simultaneously by closed-circuit respirometry in six lesser scaup Aythya affinis Eyton (body mass=591&plusmn;30 g) during bouts of voluntary feeding dives. Durations of dives (td=13.5&plusmn;1.4 s) and surface intervals (ti=16.3&plusmn;2.2 s) were within the normal range for ducks diving to 1.5 m depth. Mechanical power output (3.69&plusmn;0.24 W kg-1) and aerobic power input (29.32&plusmn;2.47 W kg-1) were both higher than previous estimates. Buoyancy was found to be the dominant factor determining dive costs, con

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McCulloch, P. F., I. A. Paterson, and N. H. West. "An intact glutamatergic trigeminal pathway is essential for the cardiac response to simulated diving." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 269, no. 3 (1995): R669—R677. http://dx.doi.org/10.1152/ajpregu.1995.269.3.r669.

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Nasal water flow plus concomitant expiratory apnea in anesthetized (Innovar-Vet), paralyzed, and artificially ventilated rats produces immediate bradycardia. To investigate the origin of this response, four procedures were used to block the trigeminal pathway. 1) Trigeminal receptors within the nasal passages were anesthetized by infusing local anesthetic through the external nares. 2) Trigeminal nerves that innervate the nasal passages were sectioned bilaterally as they passed through the orbit. 3) The trigeminal neural pathway was blocked within the brain stem by either electrolytically lesi

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Ponganis, P. J., G. L. Kooyman, L. N. Starke, C. A. Kooyman, and T. G. Kooyman. "Post-dive blood lactate concentrations in emperor penguins, Aptenodytes forsteri." Journal of Experimental Biology 200, no. 11 (1997): 1623–26. http://dx.doi.org/10.1242/jeb.200.11.1623.

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In order to determine an aerobic diving limit (ADL) in emperor penguins (Aptenodytes forsteri), post-dive blood lactate concentrations were measured in penguins foraging at an isolated sea ice hole. Resting lactate concentrations were 1.2-2.7 mmol l-1. Serial samples revealed that lactate level usually peaked within 5 min after dives and that 7-12 min was required for lactate concentrations to decrease from 5-8 mmol l-1 to less than 2.5 mmol l-1. Post-dive lactate level was not elevated above 3 mmol l-1 for dives shorter than 5 min. Two-phase regression analysis revealed a transaction at 5.6 m

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Brampton, William, and Martin DJ Sayer. "Decompression sickness after a highly conservative dive in a diver with known persistent foramen ovale: Case report." Diving and Hyperbaric Medicine Journal 51, no. 1 (2021): 111–15. http://dx.doi.org/10.28920/dhm51.1.111-115.

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A diver returned to diving, 15 months after an episode of neuro-spinal decompression sickness (DCS) with relapse, after which she had been found to have a moderate to large provoked shunt across a persistent (patent) foramen ovale (PFO), which was not closed. She performed a single highly conservative dive in line with the recommendations contained in the 2015 position statement on PFO and diving published jointly by the South Pacific Underwater Medicine Society and the United Kingdom Sports Diving Medical Committee. An accidental Valsalva manoeuvre shortly after surfacing may have provoked in

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Lippmann, John, Chris Lawrence, and Michael Davis. "Snorkelling and breath-hold diving fatalities in New Zealand, 2007 to 2016." Diving and Hyperbaric Medicine Journal 51, no. 1 (2021): 25–33. http://dx.doi.org/10.28920/dhm51.1.25-33.

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Introduction: New Zealand’s (NZ) long coastline offers a diverse underwater environment with abundant opportunities for harvesting seafood and for recreation. Fatalities from snorkelling/breath-hold diving have been reported from the 1960s through to 2006. Those from 2007 to 2016 are reported here. Methods: The National Coronial Information System, the Australasian Diving Safety Foundation diving fatality database, and the Water Safety NZ “Drownbase” were searched and additional coronial data provided by the NZ Ministry of Justice. An anonymised database was created and analysed for multiple f

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Fernández-Boán, María, Juan Freire, Ana M. Parma, Luis Fernández, and José M. Orensanz. "Monitoring the fishing process in the sea urchin diving fishery of Galicia." ICES Journal of Marine Science 70, no. 3 (2013): 604–17. http://dx.doi.org/10.1093/icesjms/fss207.

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Abstract Fernández-Boán, M., Freire, J., Parma, A. M., Fernández, L., and Orensanz, J. M. 2013. Monitoring the fishing process in the sea urchin diving fishery of Galicia – ICES Journal of Marine Science, 70: 604–617. The assessment and management of small-scale benthic fisheries requires attention to the spatial structure of stocks and patterns of effort allocation. Spatial information helps in the interpretation of fisheries data, and is required for designing spatially explicit management strategies, often prescribed in the case of benthic fisheries. Monitoring of boats with GPS, combined w

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Field, Iain, Mark Hindell, David Slip, and Kelvin Michael. "Foraging strategies of southern elephant seals (Mirounga leonina) in relation to frontal zones and water masses." Antarctic Science 13, no. 4 (2001): 371–79. http://dx.doi.org/10.1017/s0954102001000529.

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Geolocating-time-depth-temperature-recorders (GLTDTR) provided a continuous record of diving behaviour in relation to water temperature for ten female southern elephant seals from Macquarie Island during their post-breeding trips to sea. Four water bodies were determined from depth/temperature profiles recorded by the GLTDTRs. These water bodies corresponded to Sub-Antarctic Mode Water (SAMW), Polar Front Zone Water (PFZW), Polar Front Water (PFW) and Antarctic Water Masses (AWM). Thermal structures within these water bodies did not influence seal diving behaviour. Overall mean dive depth, noc

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