Face Your Fears: Cleaning Gobies Inspect Predators despite Being Stressed by Them

social stressors typically elicit two distinct behavioural responses in vertebrates: an active response (i.e., "fight or flight") or behavioural inhibition (i.e., freezing). Here, we report an interesting exception to this dichotomy in a Caribbean cleaner fish, which interacts with a wide variety of reef fish clients, including predatory species. Cleaning gobies appraise predatory clients as potential threat and become stressed in their presence, as evidenced by their higher cortisol levels when exposed to predatory rather than to non-predatory clients. Nevertheless, cleaning gobies neither flee nor freeze in response to dangerous clients but instead approach predators faster (both in captivity and in the wild), and interact longer with these clients than with non-predatory clients (in the wild). We hypothesise that cleaners interrupt the potentially harmful physiological consequences elicited by predatory clients by becoming increasingly proactive and by reducing the time elapsed between client approach and the start of the interaction process. The activation of a stress response may therefore also be responsible for the longer cleaning service provided by these cleaners to predatory clients in the wild. Future experimental studies may reveal similar patterns in other social vertebrate species when, for instance, individuals approach an opponent for reconciliation after a conflict.

Crenças e atitudes dos adolescentes associadas ao uso de substâncias psicoativas: álcool, tabaco e outras substâncias psicoativas ilegais

A adolescência é usualmente marcada por mudanças ao nível do corpo, do pensamento, das atitudes e da vida social que tornam os jovens mais vulneráveis a desenvolver comportamentos irracionais e impulsivos como o consumo de substâncias psicoativas. Neste sentido, o principal objetivo deste estudo é compreender as crenças e atitudes que motivam os jovens adolescentes a usar substâncias como álcool, tabaco e outras substâncias psicoativas. Para tal, foi escolhida uma amostra por conveniência entre os estudantes de três escolas pertencentes ao Instituto Politécnico de Portalegre, nomeadamente a Escola Superior de Educação de Portalegre, a Escola Superior de Tecnologia e Gestão de Portalegre e a Escola Superior de Saúde de Portalegre. A amostra é constituída por 193 estudantes, sendo que a idade dos participantes oscila entre os 18 anos e os 25 anos. Deste modo, foi aplicado o questionário HIT-D&A que permite medir as crenças e atitudes dos jovens, associadas ao uso de substâncias psicoativas como o álcool, o tabaco e outras substâncias psicoativas ilegais. Os resultados evidenciaram que as principais substâncias psicoativas consumidas pelos jovens são o álcool, seguindo-se o tabaco e a marijuana. Outra conclusão é a existência de diferenças significativas entre os dois géneros, sendo que os rapazes apresentam uma média superior face às raparigas de forma estatisticamente significativa. Embora não haja diferenças estatisticamente significativas entre faixas etárias, conclui-se que há mais consumos de substâncias psicoativas entre os jovens mais velhos. No que respeita às médias das três escolas analisadas, estas são superiores na Escola Superior de Tecnologia e Gestão de Portalegre. Os resultados também mostraram a existência de uma forte associação entre as três distorções cognitivas (centração no eu, culpar os outros e assumir o piro e minimizar e etiquetar) e os consumos das várias substâncias psicoativas.

Management of floating thrombus in the aortic arch

OBJECTIVE Floating aortic thrombus is an underrecognized source of systemic emboli and carries a life-threatening risk of stroke when located in the aortic arch. Optimal treatment is not established in available guidelines. We report our experience in managing floating thrombi in the aortic arch. METHODS Consecutive patients diagnosed with a floating aortic arch thrombus at a tertiary referral center between January 2008 and December 2014 were reviewed. Perioperative and midterm outcomes were assessed. RESULTS Ten patients (8 female) with a median age of 56 years (range, 47-82 years) were identified. Eight patients presented with a symptomatic embolic event, and 2 patients were asymptomatic. One patient presenting with stroke due to embolic occlusion of all supra-aortic vessels died 2 days after admission. Three patients (2 asymptomatic and 1 unfit for surgery) were treated conservatively by anticoagulation, leading to thrombus resolution in 2 patients. In the third patient, the thrombus persisted despite anticoagulation, resulting in recurrent embolic events. The remaining 6 patients underwent open thrombectomy of the aortic arch during deep hypothermic circulatory arrest. All patients treated by surgery had an uneventful postoperative course with no recurrent thrombus or embolic event during follow-up. Median follow-up of all patients was 17 months (range, 11-89 months). CONCLUSIONS Floating aortic arch thrombus is a dangerous source of systemic emboli. Surgical removal of the thrombus is easy to perform and followed by good clinical results. Conservative treatment with anticoagulation may be considered in asymptomatic, inoperable or high-risk patients.

National independence; or, A common-sense policy,

Employment demands protection.--Why any exclusive policy?--The free trade trap.--Protection enriched us, not free trade.--Free trade poisons patriotism.--Kill industries and commerce dies.--Theories are dangerous guides.--Industrial displacements spell ruin.--Independence the only policy.--The fatal policy of laissez faire.--"Cheap and nasty."--Our unearned increment.--Free trade a spiteful mistress.--The fertility of character.--We cultivate weakness, not strength.--Britons can manage British business.--Second markets.--The country's average wage.--If trusts, then British trusts.--Labour's true interests.--Germany and her navy.--Class-hatred is suicide.--The tax on wheat.--The little-Englander rat.--The seeds of decay.--Education and patriotism.--Intemperate legislators.--National strongholds.--Futile scheming.--The balance of power.--The suffragette among nations.--Naval warfare in the future.--Universal service.--Broken reeds.

Waverley novels.

List of contents at end of vol. [48].

Waverley novels ...

v. 1. Waverley.--v. 2. Guy Mannering.--v. 3. The antiquary.--v. . Old mortality.--v. 9. Ivanhoe.--v. 10. The monastery.--v. 11. The abbott.--v. 12. Kenilworth.--v. 13. The pirate.--v. 14. Fortunes of Nigel.--v. 15. Peveril of the peak.--v. 16. Quentin Durward.--v. 17. St Ronan's well.--v. 18. Red-gauntlet.--v. 19. The betrothed; The highland widow.--v. 21. Woodstock.--v. 22. The fair maid of Perth.--v. 23. Anne of Ceierstein.--v. 24. Count Robert of Paris.--v. 25. The surgeon's daughter; Castle dangerous.

Waverly novels /

Each volume has added title-page engraved, with vignette and engraved dedication.

[The novels and poems of Sir Walter Scott]

Ed. by Andrew Lang.

Waverly novels.

v. 1. Waverly. Guy Mannering.--v. 2. The antiquary. The black dwarf. Old mortality.--v. 3. Rob Roy. The heart of Mid-Lothian.--v. 4. The bride of Lammermoor. A legend of Montrose. Ivanhoe.--v. 5. The monastery. The abbot.--v. 6. Kenilworth. The pirate.--v. 7. The fortunes of Nigel. Peveril of the Peak.--v. 8. Quentin Durward. St. Ronan's well.--v. 9. Redgauntlet. The bethrothed. The talisman.--v. 10. Woodstock. The Highland widow. The two drovers. The surgeon's daughter.--v. 11. The fair maid of Perth. Anne of Geierstein.--v. 12. Count Robert of Paris. Castle Dangerous. My Aunt Margaret's mirror. The tapestried chamber. The laird's Jock. Index and glossary.

The Waverley novels /

Each volume has special t.p.; title vignettes.

Proceedings of the Alternatives to Drug Abuse Conference... May 16-18, 1972.

Mode of access: Internet.

Fact sheets.

Mode of access: Internet.

Illinois On-Site Safety and Health Consultation Program.

The Illinois On-Site Safety and Health Consultation Program assists employers in providing their employees a safe and healthy workplace. The goal of the program is to help Illinois employers identify and correct potential safety and health hazards before they become expensive and dangerous problems.

Illinois On-Site Safety and Health Consultation Program.

The Illinois On-Site Safety and Health Consultation Program assists employers in providing their employees a safe and healthy workplace. The goal of the program is to help Illinois employers identify and correct potential safety and health hazards before they become expensive and dangerous problems.

Illinois State plan for drug abuse prevention, FY 1979 /

Mode of access: Internet.