First molecular detection and characterization of herpesvirus and poxvirus in a Pacific walrus (Odobenus rosmarus divergens)

BACKGROUND Herpesvirus and poxvirus can infect a wide range of species: herpesvirus genetic material has been detected and amplified in five species of the superfamily Pinnipedia; poxvirus genetic material, in eight species of Pinnipedia. To date, however, genetic material of these viruses has not been detected in walrus (Odobenus rosmarus), another marine mammal of the Pinnipedia clade, even though anti-herpesvirus antibodies have been detected in these animals. CASE PRESENTATION In February 2013, a 9-year-old healthy captive female Pacific walrus died unexpectedly at L'Oceanografic (Valencia, Spain). Herpesvirus was detected in pharyngeal tonsil tissue by PCR. Phylogenetic analysis revealed that the virus belongs to the subfamily Gammaherpesvirinae. Poxvirus was also detected by PCR in skin, pre-scapular and tracheobronchial lymph nodes and tonsils. Gross lesions were not detected in any tissue, but histopathological analyses of pharyngeal tonsils and lymph nodes revealed remarkable lymphoid depletion and lymphocytolysis. Similar histopathological lesions have been previously described in bovine calves infected with an alphaherpesvirus, and in northern elephant seals infected with a gammaherpesvirus that is closely related to the herpesvirus found in this case. Intracytoplasmic eosinophilic inclusion bodies, consistent with poxviral infection, were also observed in the epithelium of the tonsilar mucosa. CONCLUSION To our knowledge, this is the first molecular identification of herpesvirus and poxvirus in a walrus. Neither virus was likely to have contributed directly to the death of our animal.

Pronounced inter-colony variation in the foraging ecology of Australasian gannets : influence of habitat differences

The predictability of prey due to oceanographic features can result in large aggregations of apex predators. Central place foragers, such as seabirds, are limited in their foraging duration and range during the breeding period, which can restrict their ability to reach such locations. Segregation by colony and sex can further restrict foraging range and may have direct implications for the foraging ecology of a species. In parts of its range, the Australasian gannet Morus serrator breeds in colonies of relatively close proximity and has recently been found to display sexual dimorphism. Two neighbouring breeding colonies in Bass Strait that experience divergent environmental conditions were investigated to determine whether these conditions or the sex of the individual are important variables influencing foraging behaviour in this species. GPS tracking and accelerometry were paired with stable isotope analysis to compare differences in foraging effort, habitat use and diet. Birds from Point Danger, a large colony located near a seasonally strong upwelling, travelled considerably further (77%) than birds from Pope's Eye, a small colony in a nutrient-poor embayment. However, within colonies no sexual differences in foraging effort were found. While the colonies did not overlap in foraging areas, a degree of sexual segregation was apparent within both colonies (Point Danger 46.3% overlap and Pope's Eye 73.7% overlap in home range). Furthermore, stable isotope analysis indicated birds from each colony fed at different trophic niches. This study reveals differences in habitat use and, consequently, dietary niches between and within neighbouring colonies.

Testing optimal foraging theory models on benthic divers

Empirical testing of optimal foraging models on diving air-breathing animals is limited due to difficulties in quantifying the prey field through direct observations. Here we used accelerometers to detect rapid head movements during prey encounter events (PEE) of free-ranging benthic-divers, Australian fur seals, Arctocephalus pusillus doriferus. PEE signals from accelerometer data were validated by simultaneous video data. We then used PEEs as a measure of patch quality to test several optimal foraging model predictions. Seals had longer bottom durations in unfruitful dives (no PEE) than those with some foraging success (PEE. ≥. 1). However, when examined in greater detail, seals had longer bottom durations in dives with more PEEs, but shorter bottom durations in bouts (sequences of dives) with more PEEs. Our results suggest that seals were generally maximizing bottom durations in all foraging dives, characteristic of benthic divers. However, successful foraging dives might be more energetically costly (e.g. digestive costs), thus resulting in shorter bottom durations at the larger scale of bouts. Our study provides a case study of how the foraging behaviour of a central place forager foraging in a fairly homogeneous environment, with relatively high travel costs, may deviate from current foraging models under different situations. Future foraging models should aim to integrate other aspects (e.g. diet) of the foraging process for more accurate predictions.

Lessons from Alison: a narrative study of differentiation in classroom teaching

Teaching is challenging in part because, although school structures are to some extent modelled on industrial approaches in which the ‘raw materials’ are assumed to be very similar, human beings are endlessly diverse. Understanding the many differences amongst students, and treating these differences as teaching resources rather than deficits, is a powerful approach. This paper draws on teacher interviews and classroom observations collected during a two-year study of two regional Queensland schools to explore issues of ‘recognition’, ‘distribution’ and social justice. It uses narrative vignettes from a single classroom to provide an occasion for reflection on the part of the reader on how schooling can better meet the needs of students, and outlines six pedagogical practices for effective classroom teaching.

Differentiated learning: from policy to classroom

This paper explores the impact of a Teaching and Learning Audit of all government schools in Queensland, Australia. This audit has a concern with the extent to which schools ‘differentiate classroom learning’. We note that in England, since September 2012, one of the standards that teachers have been expected to demonstrate is an ability to ‘differentiate appropriately’, and thus the lessons of how this particular audit was implemented in Queensland have relevance outside of Australia. The paper draws on data collected from Red Point High School, one of the State’s 1257 schools and education centres audited in 2010. We suggest that this requirement to differentiate classroom learning was implemented without appropriate clarity or support, and that it increased teacher surveillance in this school. However, we also argue that some spaces were opened up by this audit, and its concern with differentiation, to articulate a social justice agenda within the school. We conclude that differentiation is a complex concept which is not easy to shift from a policy to a classroom context, and requires more careful explication at policy level and more support for teachers to enact.

Sexual segregation in habitat use is smaller than expected in a highly dimorphic marine predator, the southern sea lion

Sexual segregation in habitat use is widely reported in many taxa and can profoundly influence the distribution and behaviour of animals. However, our knowledge of the mechanisms driving sexual segregation is still in its infancy (particularly in marine taxa) and the influence of extrinsic factors in mediating the expression of sex differences in foraging behaviour is underdeveloped. Here, we combine data from biologging tags, with stable isotope analysis of vibrissae, to assess sexual segregation in southern sea lions (SSL) (Otaria flavescens) breeding at the Falkland Islands in the South Atlantic. We found evidence to support segregation, most notably in δ13C and δ15N values. However, in spite of extreme sexual size dimorphism and differing constraints related to female-only parental care, adult male and adult female SSL overlapped considerably in isotopic niches and foraging area, and shared similar foraging trip characteristics (such as distance and duration). This is in contrast to SSL breeding in Argentina, where prior studies report sexual differences in foraging locations and foraging trip characteristics. We posit that sexual segregation in SSL is influenced by habitat availability (defined here as the width of the Patagonian Shelf) and individual foraging preferences, rather than commonly invoked individual-based limiting factors per se.

Investigating ‘moments’ for student agency through a differentiated music curriculum

Research provides compelling evidence linking music-making to academic achievement and increased wellbeing for disengaged students. However, in the Australian context, education policy has narrowed its focus to literacy and numeracy, with an associated ‘accountability’ framework of mandated assessment and reporting practices. Within this context teachers are being asked to demonstrate how, through their pedagogical practices, they meet the needs of all their students. As a result of this, differentiation has become the lens through which student learning and engagement are being monitored. Drawing on data from a large state secondary school, this paper examines how a differentiated music curriculum is being implemented to support student agency. We demonstrate that, through a range of formal and informal music programs, agency is enhanced through the development of self-reflexive and self-referential learning practices. However, we suggest that differentiation, alone, does not unmask the reasons behind students’ different learning experiences nor does it necessarily redress entrenched educational inequalities. We also suggest that the ‘moments’ for student agency, created by these music programs, may have as much to do with the ‘fragile’ position of music within the broader school curriculum where the spotlight of high-stakes testing is directed elsewhere.

Sensitivity of fine-scale species distribution models to locational uncertainty in occurrence data across multiple sample sizes

To generate realistic predictions, species distribution models require the accurate coregistration of occurrence data with environmental variables. There is a common assumption that species occurrence data are accurately georeferenced; however, this is often not the case. This study investigates whether locational uncertainty and sample size affect the performance and interpretation of fine-scale species distribution models. This study evaluated the effects of locational uncertainty across multiple sample sizes by subsampling and spatially degrading occurrence data. Distribution models were constructed for kelp (Ecklonia radiata), across a large study site (680 km2) off the coast of southeastern Australia. Generalized additive models were used to predict distributions based on fine-resolution (2·5 m cell size) seafloor variables, generated from multibeam echosounder data sets, and occurrence data from underwater towed video. The effects of different levels of locational uncertainty in combination with sample size were evaluated by comparing model performance and predicted distributions. While locational uncertainty was observed to influence some measures of model performance, in general this was small and varied based on the accuracy metric used. However, simulated locational uncertainty caused changes in variable importance and predicted distributions at fine scales, potentially influencing model interpretation. This was most evident with small sample sizes. Results suggested that seemingly high-performing, fine-scale models can be generated from data containing locational uncertainty, although interpreting their predictions can be misleading if the predictions are interpreted at scales similar to the spatial errors. This study demonstrated the need to consider predictions across geographic space rather than performance alone. The findings are important for conservation managers as they highlight the inherent variation in predictions between equally performing distribution models, and the subsequent restrictions on ecological interpretations.

Outcropping reef ledges drive patterns of epibenthic assemblage diversity on cross-shelf habitats

Seafloor habitats on continental shelf margins are increasingly being the subject of worldwide conservation efforts to protect them from human activities due to their biological and economic value. Quantitative data on the epibenthic taxa which contributes to the biodiversity value of these continental shelf margins is vital for the effectiveness of these efforts, especially at the spatial resolution required to effectively manage theseecosystems. We quantified the diversity of morphotype classes on an outcropping reef system characteristic of the continental shelf margin in the Flinders Commonwealth Marine Reserve, southeastern Australia. The system is uniquely characterized by long linear outcropping ledge features in sedimentary bedrock that differ markedly from the surrounding low-profile, sand-inundated reefs. We characterize a reef system harboring rich morphotype classes, with a total of 55 morphotype classes identified from the still images captured by an autonomous underwater vehicle. The morphotype class Cnidaria/Bryzoa/Hydroid matrix dominated the assemblages recorded. Both a and b diversitydeclined sharply with distance from nearest outcropping reef ledge feature. Patterns of the morphotype classes were characterized by (1) morphotype turnover at scales of 5 to 10s m from nearest outcropping reef ledge feature, (2) 30 % of morphotype classes were recordedonly once (i.e. singletons), and (3) generally low levels of abundance (proportion cover) of the component morphotype class. This suggests that the assemblages in this region contain a considerable number of locally rare morphotype classes. This study highlights the particular importance of outcropping reef ledge features in this region, as they provide a refuge against sediment scouring and inundation common on the low profile reef that characterizes this region. As outcropping reef features, they represent a small fraction of overall reef habitat yet contain much of the epibenthic faunal diversity. This study has relevance to conservation planning for continental shelf habitats, as protecting a single, or few, areas of reef is unlikely to accurately represent the geomorphic diversity of cross-shelf habitats and the morphotype diversity that is associated with these features. Equally, whendesigning monitoring programs these spatially-discrete, but biologically rich outcropping reef ledge features should be considered as distinct components in stratified sampling designs.

Using Butler to understand the multiplicity and variability of policy reception

Understanding how teachers make sense of education policy is important. We argue that an exploration of teacher reactions to policy requires an engagement with theory focused on the formation of ‘the subject’ since this form of theorisation addresses the creation of a seemingly coherent identity and attitude while acknowledging variation across different places and people. In this paper, we propose the utility of Butlerian ideas because of the focus on subjectivity that her work entails and the account she gives for social norms regulating people’s actions and attitudes. We use Butler’s stance on how ‘cultural intelligibility’ is formed to account for the complex, messy and sometimes contradictory ‘take up’ of curriculum policy by 10 teachers at a secondary school case study in Queensland, Australia. We use the phrase ‘policy reception’ to signify a particular theoretical line of thought we are forming with our application of Butlerian theory to the analysis of teacher attitudes toward curriculum policy, and to distinguish it from ‘policy interpretation’, ‘policy translation’ and ‘policy enactment’.

Beyond culturalism: addressing issues of Indigenous disadvantage through schooling

This paper draws from a study that explored issues of student equity, marginality and diversity in two secondary schools in regional Queensland (Australia). The paper foregrounds interview data gathered from administration, teaching and ancillary staff at one of the schools, ‘Crimson’ High School. The school has a high Indigenous student population and is well recognised within the broader community as catering well to this population. With reference to the school’s concerns about Indigenous disadvantage and the various approaches undertaken to address this disadvantage, the paper articulates the significance of educators being critically aware of how they construct race and use it as an organising principle in their work. This awareness is central to moving beyond the culturalism and racial incommensurability that tend to predominate within Indigenous education—where cultural reductionism homogenises indigeneity within and against a dominant White norm. With reference to a specific approach at the school designed predominantly for Indigenous male students—to foster inter-cultural awareness and respect through sport—we highlight ways in which notions of culturalism and racial incommensurability might be disrupted.

The politics of differentiation in schools

In many English-speaking countries, teachers are encouraged to differentiate their classrooms, and in some cases, through various policy mechanisms. This encouragement is often accompanied by threats and sanctions for not making the grade. By exploring the ways in which one education system in Australia has mandated differentiation through an audit of teacher practices, this book provides a timely engagement with the relationship between differentiated classrooms and social justice. It covers tensions, for instance, between providing culturally-appropriate classrooms, including constructing engaging and relevant curricula, and lowering expectations for students who have traditionally been marginalised by schooling. The data for this book has been collected from the same group of teachers over a period of three years, and offers detailed insights into how a particular politics of differentiation has played itself out in the context of a ‘global reform movement’ that has focused on improving student outcomes.

SOLUTIONS: Assistive Technology for People with Brain Injury, February 22, 2016

The Brain A project of the Iowa Department of Public Health and the Iowa Advisory Council on Brain Injuries, produced with assistance from the Iowa Program for Assistive Technology University of Iowa Center for Disabilities and Development and Easter Seals This booklet was supported in part by the Health Resources and Services Administration (HRSA) of the U.S. Department of Health and Human Services (HHS) under grant number H21MC26929 titled: Traumatic Brain Injury Implementation. This information or content and conclusions are those of the authors/s and should not be construed as the official position or policy of, nor should any endorsements be inferred by, HRSA, HHS, or the U.S. Government.