Active positioning of vent larvae at a mid-ocean ridge

Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part II: Topical Studies in Oceanography 92 (2013): 46-57, doi:10.1016/j.dsr2.2013.03.032.The vertical position of larvae of vent species above a mid-ocean ridge potentially has a strong effect on their dispersal. Larvae may be advected upward in the buoyant vent plume, or move as a consequence of their buoyancy or active swimming. Alternatively, they may be retained near bottom by the topography of the axial trough, or by downward swimming. At vents near 9°50’N on the axis of the East Pacific Rise, evidence for active larval positioning was detected in a comparison between field observations of larvae in the plankton in 2006 and 2007 and distributions of non-swimming larvae in a two-dimensional bio-physical model. In the field, few vent larvae were collected at the level of the neutrally buoyant plume (~75 m above bottom); their relative abundances at that height were much lower than those of simulated larvae from a near-bottom release in the model. This discrepancy was observed for many vent species, particularly gastropods, suggesting that they may actively remain near bottom by sinking or swimming downward. Near the seafloor, larval abundance decreased from the ridge axis to 1000 m off axis much more strongly in the observations than in the simulations, again pointing to behavior as a potential regulator of larval transport. We suspect that transport off axis was reduced by downward-moving behavior, which positioned larvae into locations where they were isolated from cross-ridge currents by seafloor topography, such as the walls of the axial valley – which are not resolved in the model. Cross-ridge gradients in larval abundance varied between gastropods and polychaetes, indicating that behavior may vary between taxonomic groups, and possibly between species. These results suggest that behaviorally mediated retention of vent larvae may be common, even for species that have a long planktonic larval duration and are capable of long-distance dispersal.We gratefully acknowledge the support of NSF grants OCE-0424953 and OCE-0525361, which funded the Larval Dispersal on the Deep East Pacific Rise (LADDER) project. WHOI provided additional support to LSM as an Ocean Life Fellow, to DJM as the Holger Jannasch Chair for Excellence in Oceanography, and to JRL as the Edward W. and Betty J. Scripps Senior Scientist Chair. JWL was supported by the National Oceanic and Atmospheric Administration’s (NOAA) Vents Program and by NOAA’s Pacific Marine Environmental Laboratory

Serological Responses of Raccoons and Striped Skunks to Ontario Rabies Vaccine Bait in West Virginia during 2012–2016

Since the 1990s, oral rabies vaccination (ORV) has been used successfully to halt the westward spread of the raccoon rabies virus (RV) variant from the eastern continental USA. Elimination of raccoon RV from the eastern USA has proven challenging across targeted raccoon (Procyon lotor) and striped skunk (Mephitis mephitis) populations impacted by raccoon RV. Field trial evaluations of the Ontario Rabies Vaccine Bait (ONRAB) were initiated to expand ORV products available to meet the rabies management goal of raccoon RV elimination. This study describes the continuation of a 2011 trial inWest Virginia. Our objective was to evaluate raccoon and skunk response to ORV occurring in West Virginia for an additional two years (2012–2013) at 75 baits/km2 followed by three years (2014–2016) of evaluation at 300 baits/km2. We measured the change in rabies virus-neutralizing antibody (RVNA) seroprevalence in targeted wildlife populations by comparing levels pre- and post-ORV during each year of study. The increase in bait density from 75/km2 to 300/km2 corresponded to an increase in average post-ORV seroprevalence for raccoon and skunk populations. Raccoon population RVNA levels increased from 53% (300/565, 95% CI: 50–57%) to 82.0% (596/727, 95% CI: 79–85%) during this study, and skunk population RVNA levels increased from 11% (8/72, 95% CI: 6–20%) to 39% (51/130, 95% CI: 31–48%). The RVNA seroprevalence pre-ORV demonstrated an increasing trend across study years for both bait densities and species, indicating that multiple years of ORV may be necessary to achieve and maintain RVNA seroprevalence in target wildlife populations for the control and elimination of raccoon RV in the eastern USA

Smoke gets in your eyes:what is sociological about cigarettes?

Contemporary public health approaches increasingly draw attention to the unequal social distribution of cigarette smoking. In contrast, critical accounts emphasize the importance of smokers’ situated agency, the relevance of embodiment and how public health measures against smoking potentially play upon and exacerbate social divisions and inequality. Nevertheless, if the social context of cigarettes is worthy of such attention, and sociology lays a distinct claim to understanding the social, we need to articulate a distinct, positive and systematic claim for smoking as an object of sociological enquiry. This article attempts to address this by situating smoking across three main dimensions of sociological thinking: history and social change; individual agency and experience; and social structures and power. It locates the emergence and development of cigarettes in everyday life within the project of modernity of the nineteenth and twentieth centuries. It goes on to assess the habituated, temporal and experiential aspects of individual smoking practices in everyday lifeworlds. Finally, it argues that smoking, while distributed in important ways by social class, also works relationally to render and inscribe it

The Vehicle, April 1960, Vol. 2 no. 2

Vol. 2, No. 2 Table of Contents A White Man\u27s BurdenRobert Mills Frenchpage 2 RealistA.B. Carterpage 4 The Two MatchesLouise A. Kemperpage 5 Thought Upon Looking at a Modern Painting Titled Grass Thomas McPeakpage 7 BewareDennis Lewispage 7 WavesJean Nightingalepage 7 The SpectatorKathleen Ferreepage 8 Animal RugAl Brookspage 8 Success Comes to CulturevilleJ.B. Youngpage 9 On Giving Up Religion in DespairThe Skepticpage 11 The DecisionGeorge Fosterpage 12 Wisdom ConfoundedJames D. Rannepage 15 Smalltown: 5 A.M.James M. Jenkinsonpage 15 Man of MettleC.E.S.page 16https://thekeep.eiu.edu/vehicle/1005/thumbnail.jp

The Vehicle, April 1960, Vol. 2 no. 2

Vol. 2, No. 2 Table of Contents A White Man\u27s BurdenRobert Mills Frenchpage 2 RealistA.B. Carterpage 4 The Two MatchesLouise A. Kemperpage 5 Thought Upon Looking at a Modern Painting Titled Grass Thomas McPeakpage 7 BewareDennis Lewispage 7 WavesJean Nightingalepage 7 The SpectatorKathleen Ferreepage 8 Animal RugAl Brookspage 8 Success Comes to CulturevilleJ.B. Youngpage 9 On Giving Up Religion in DespairThe Skepticpage 11 The DecisionGeorge Fosterpage 12 Wisdom ConfoundedJames D. Rannepage 15 Smalltown: 5 A.M.James M. Jenkinsonpage 15 Man of MettleC.E.S.page 16https://thekeep.eiu.edu/vehicle/1005/thumbnail.jp

Participant Blinding and Gastrointestinal Illness in a Randomized, Controlled Trial of an In-Home Drinking Water Intervention

We conducted a randomized, triple-blinded home drinking water intervention trial to determine if a large study could be undertaken while successfully blinding participants. Households were randomized 50:50 to use externally identical active or sham treatment devices. We measured the effectiveness of blinding of participants by using a published blinding index in which values >0.5 indicate successful blinding. The principal health outcome measured was “highly credible gastrointestinal illness” (HCGI). Participants (n=236) from 77 households were successfully blinded to their treatment assignment. At the end of the study, the blinding index was 0.64 (95% confidence interval 0.51-0.78). There were 103 episodes of HCGI during 10,790 person-days at risk in the sham group and 82 episodes during 11,380 person-days at risk in the active treatment group. The incidence rate ratio of disease (adjusted for the clustered sampling) was 1.32 (95% CI 0.75, 2.33) and the attributable risk was 0.24 (95% CI -0.33, 0.57). These data confirm that participants can be successfully blinded to treatment group assignment during a randomized trial of an in-home drinking water intervention

A qualitative descriptive analysis of nurses' perceptions of hospice care for deceased children following organ donation in hospice cool rooms

YesFollowing organ donation, bodies of children are generally cared for in hospital mortuaries or by funeral directors, and their families are offered little routine bereavement support. A partnership between an organ donation nursing team and regional children's hospice trialled an initiative where families were offered bereavement support from the hospice, and their child's body was cared for in a 'cool room' after death. Hospice services are usually restricted to children with life-limiting conditions, and their families. To explore the perceptions and experience of nursing staff who are involved in supporting families of children and young people who have been cared for in children's hospice cool rooms after death, following organ donation. A qualitative exploratory study consisting of a focus group interview with registered nurses from the children's hospice and organ donation teams. A purposeful sample of nurses was recruited. Data were collected in a digitally-recorded focus group interview during March 2018. The interview was transcribed and analysed using a qualitative content approach. Six nurses participated in the focus group. Analysis revealed five themes that characterised the perceptions of nurses: (i) barriers to care, (ii) bereavement care for families, (iii) impact on families and staff, (iv) influencers and enablers of change, and (v) sustainability of new practices. Nurses perceived the long-term, responsive and family-centred approach to bereavement support as a strength of the hospice model, reducing the experience of moral distress in organ donation nurses

Be prepared: communism and the politics of scouting in 1950s Britain

This article examines the exposure, and in some cases dismissal, of Boy Scouts who belonged or sympathised with the Young Communist League in Britain during the early 1950s. A focus on the rationale and repercussions of the organisation's approach and attitudes towards ‘Red Scouts’ found within their ‘ranks’ extends our understanding of youth movements and their often complex and conflicting ideological foundations. In particular, the post-World War Two period presented significant challenges to these spaces of youth work in terms of broader social and political change in Britain. An analysis of the politics of scouting in relation to Red Scouts questions not only the assertion that British McCarthyism was ‘silent’, but also brings young people firmly into focus as part of a more everyday politics of communism in British society