Effects of El Niño events on energy demand and egg production of rockfish (Scorpaenidae: Sebastes): a bioenergetics approach

Fish bioenergetics models estimate relationships between energy budgets and environmental and physiological variables. This study presents a generic rockfish (Sebastes) bioenergetics model and estimates energy consumption by northern California blue rockf ish (S. mystinus) under average (baseline) and El Niño conditions. Compared to males, female S. mystinus required more energy because they were larger and had greater reproductive costs. When El Niño conditions (warmer temperatures; lower growth, condition, and fecundity) were experienced every 3−7 years, energy consumption decreased on an individual and a per-recruit basis in relation to baseline conditions, but the decrease was minor (<4% at the individual scale, <7% at the per-recruit scale) compared to decreases in female egg production (12−19% at the individual scale, 15−23% at the per-recruit scale). When mortality in per-recruit models was increased by adding fishing, energy consumption in El Niño models grew more similar to that seen in the baseline model. However, egg production decreased significantly — an effect exacerbated by the frequency of El Niño events. Sensitivity analyses showed that energy consumption estimates were most sensitive to respiration parameters, energy density, and female fecundity, and that estimated consumption increased as parameter uncertainty increased. This model provides a means of understanding rockfish trophic ecology in the context of community structure and environmental change by synthesizing metabolic, demographic, and environmental information. Future research should focus on acquiring such information so that models like the bioenergetics model can be used to estimate the effect of climate change, community shifts, and different harvesting strategies on rockfish energy demands

Proposal to encode additional Unified Canadian Aboriginal Syllabics in the UCS

This is a proposal to encode additional Canadian Aboriginal Syllabics in the international character encoding standard Unicode. This set of characters was published in Unicode Standard version 5.2 in October 2009. The characters were added to support Algonquian communities (Cree, Moose Cree, and Ojibway) and Dene communities (Hare Dene, Beaver Dene, Chipewyan, and Carrier)

Thomson scattering in high-intensity chirped laser pulses

We consider the Thomson scattering of an electron in an ultra-intense chirped laser pulse. It is found that the introduction of a negative chirp means the electron enters a high frequency region of the field while it still has a large proportion of its original energy. This results in a significant enhancement of the energy and intensity of the emitted radiation as compared to the case without chirping.Comment: 6 pages, 6 figure

A rounded picture is what we need : rhetorical strategies, arguments, and the negotiation of change in a UK hospital trust

This article is concerned with the introduction of the agenda of New Public Management (NPM) within the board of a UK Hospital Trust: West London Hospital (WLH). We discuss the literature on New Public Management, including its limitations for analysing the organizational reality of implementing NPM. But we will also be drawing on discourse theory and the literature on rhetoric. The main argument in this article is that in order to understand the reality of the NPM paradigm, we need to study the rhetorical strategies of protagonists involved in the negotiation of the NPM agenda. Rhetorical strategies are means of making general viewpoints more convincing, for example, by comparing 'our' organization with similar organizations. Rhetorical strategies show patterns, which reappear in conversations and arguments made by protagonists. Specifically, we identified three rhetorical strategies justifying why and what kind of a more 'rounded picture' was required: widening the argument to include national productivity comparisons with other hospitals; widening the argument away from a narrow focus on finance toward a strategic and political perspective; and, lastly, widening the argument to look at innovation in the whole clinical process

The effect of previous wingate performance using one body region on subsequent wingate performance using a different body region

The 30 second Wingate Anaerobic Test (WAnT) is the gold standard measure of anaerobic performance. The present investigation aimed to determine if a previous WAnT using one body region significantly affected a subsequent WAnT using a different body region. Twelve male university students (n = 12, 23 ± 2 years, 84 ± 16.1 kg, 178.5 ± 7.4 cm) volunteered to complete two repeated WAnT protocols (either lower body WAnT followed by an upper body WAnTor vice versa) on two separate testing occasions. The upper body WAnT was conducted on a modified electromagnetically braked cycle ergometer using a flywheel braking force corresponding to 5% bodyweight. The lower body WAnT was conducted on an electronically braked cycle ergometer using a flywheel braking force corresponding to 7.5% bodyweight. Participants had a 1 minute rest period for transition between WAnTs. Data are reported as mean ± standard deviation. No significant differences were identified in power indices for the lower body between 30 s WAnTs. When the upper body WAnT was performed 2nd, absolute peak power (p < 0.01), mean power (p < 0.001) and relative mean power (p < 0.001) were significantly lower compared to when the upper body WAnT was performed 1st. The value of maximum revolutions per minute was significantly lower (p < 0.001) when the upper body WAnT was performed after the lower body WAnT, compared to when it was performed 1st (193.3 ± 11.4 1st vs 179.8 ± 14.4 2nd). Previous upper body sprint exercise does not significantly affect lower body sprint exercise; however, previous lower body sprint exercise severely compromises subsequent upper body sprint performance