Low, stable friction, a higher load-carrying capacity, and lower leakage of sealed blood are required for mechanical seals in implantable ventricular assist devices. One solution is to apply surface texture to the mechanical seal surface, consisting of self-mated silicon carbide. However, the effect of surface texture on the frictional properties of mechanical seals under blood sealing conditio...

Information regarding analgesics in pinnipeds is limited. This study aimed to establish the pharmacokinetic parameters of a single subcutaneous dose of sustained release buprenorphine (Buprenorphine SR) in juvenile northern elephant seals (Mirounga angustirostris) with regard to its potential to provide long-lasting analgesia that requires infrequent dosing. Seals (n=26) were administered a sin...

For secure online behaviour, individual attitudes like the users’ trust in websites are just as important as technical security means. One possibility to accomplish trust in the web environment is the use of third party web assurance seals. Still, the effects of such security indicators are discussed controversially. Previous studies indicated that online users are vulnerable to visual deceptio...

Marine mammals have lost the ability to express S-cone opsin, and possess only one type of M/L-cone in addition to numerous rods. As they are cone monochromats they should be color blind. However, early behavioral experiments with fur seals and sea lions indicated discrimination ability between many shades of grey and blue or green. On the other hand, most recent training experiments with harbo...

Ringed seals (Pusa hispida) are broadly distributed in seasonally ice covered seas, and their survival and reproductive success is intricately linked to sea ice and snow. Climatic warming is diminishing Arctic snow and sea ice and threatens to endanger ringed seals in the foreseeable future. We investigated the population structure and connectedness within and among three subspecies: Arctic (P....

This communication presents observations of predatory and non-predatory encounters between white sharks and Cape fur seals in a shallow (3–6 m) channel between Geyser Rock and Dyer Island, South Africa. Within the channel Cape fur seals raft extensively for thermoregulatory purposes, to play, or due to terrestrial competition for space. The channel’s physical environment effectively limits a wh...

Since 1987, morbillivirus infections have caused serious disease outbreaks with high mortality among aquatic mammals. Baikal seals (Phoca sibirica) in Siberia were involved in an outbreak caused by a virus closely related to canine distemper virus (CDV) in 1987. Harbour seals (Phoca vitulina) and grey seals (Halichoerus grypus) in north-western Europe were struck by a newly recognised morbilliv...

With the unprecedented growth of the Internet, business -to-consumer (B2C) commerce has grown to vast proportions. However, after years of practice, how to promote consumers’ trust towards their storefronts is still the most critical challenge for B2C online merchants (Hoffman and Novak 1996, Jarvenpaa et al. 2000, Kovar et al. 2000). Presently, the main strategy for online B2C merchants is to ...

We monitored the haul-out behavior of 68 radio-tagged harbor seals (Pbucu vittllina) during the molt season at two Alaskan haul-out sites (Grand Island, August-September 1994; Nanvak Bay, August-September 2000). For each site, we created a statistical model of the proportion of seals hauled out as a function of date, time of day, tide, and weather covariates. Using these models, we identified t...

Online privacy is an issue of increasing national importance, and voluntary privacy seals provided by third-party organizations such as TRUSTe and BBBOnline have been proposed as a means of assuring consumer privacy. Few studies have examined privacy seal effects. This study presents results of an online experiment that evaluated consumer response to privacy seals in a naturalistic exposure set...