Independent circuits in basal ganglia and cortex for the processing of reward and precision feedback

In order to understand human decision making it is necessary to understand how the brain uses feedback to guide goal-directed behavior. The ventral striatum (VS) appears to be a key structure in this function, responding strongly to explicit reward feedback. However, recent results have also shown striatal activity following correct task performance even in the absence of feedback. This raises the possibility that, in addition to processing external feedback, the dopamine-centered reward circuit might regulate endogenous reinforcement signals, like those triggered by satisfaction in accurate task performance. Here we use functional magnetic resonance imaging (fMRI) to test this idea. Participants completed a simple task that garnered both reward feedback and feedback about the precision of performance. Importantly, the design was such that we could manipulate information about the precision of performance within different levels of reward magnitude. Using parametric modulation and functional connectivity analysis we identified brain regions sensitive to each of these signals. Our results show a double dissociation: frontal and posterior cingulate regions responded to explicit reward but were insensitive to task precision, whereas the dorsal striatum - and putamen in particular - was insensitive to reward but responded strongly to precision feedback in reward-present trials. Both types of feedback activated the VS, and sensitivity in this structure to precision feedback was predicted by personality traits related to approach behavior and reward responsiveness. Our findings shed new light on the role of specific brain regions in integrating different sources of feedback to guide goal-directed behavior

Processing Tomato Production in the Burdekin: Opportunities and Risks for Growers

The research undertaken here was in response to a decision by a major food producer in about 2009 to consider establishing processing tomato production in northern Australia. This was in response to a lack of water availability in the Goulburn Valley region following the extensive drought that continued until 2011. The high price of water and the uncertainty that went with it was important in making the decision to look at sites within Queensland. This presented an opportunity to develop a tomato production model for the varieties used in the processing industry and to use this as a case study along with rice and cotton production. Following some unsuccessful early trials and difficulties associated with the Global Financial Crisis, large scale studies by the food producer were abandoned. This report uses the data that was collected prior to this decision and contrasts the use of crop modelling with simpler climatic analyses that can be undertaken to investigate the impact of climate change on production systems. Crop modelling can make a significant contribution to our understanding of the impacts of climate variability and climate change because it harnesses the detailed understanding of physiology of the crop in a way that statistical or other analytical approaches cannot do. There is a high overhead, but given that trials are being conducted for a wide range of crops for a variety of purposes, breeding, fertiliser trials etc., it would appear to be profitable to link researchers with modelling expertise with those undertaking field trials. There are few more cost-effective approaches than modelling that can provide a pathway to understanding future climates and their impact on food production

How can protected cropping ensure an export supply of high quality melons in the tropics?

Queensland production of melons (Cucumis melo L.), typically rockmelon and honeydew fruits, is seasonal and practiced entirely outdoors

Vegetable soil health systems for overcoming limitations causing soil borne diseases

The purpose of the report is to summarise progress in developing vegetable production systems with improved soil health that overcome soil limitations with the potential to suppress soil borne diseases. Management approaches to soil health improvement were regionally specific to overcome regional soil limitations in different production environments

Leafminer pest-generic incursion management plan for the Australian vegetable industry

The currently exotic leafminers species Liriomyza trifolii, L. sativae, L. huidobrensis, L. bryoniae, and Chromatomyia horticola are insects known to damage many vegetable species overseas and can cause economic damage to the vegetable industry if they enter and establish in Australia without any pest response plan in place. The purpose of this pest-generic incursion management plan for the vegetable industry is to provide background information on the biology; potential geographic distribution of the pest; likely damage caused to the industry; diagnostic tools; available control measures; sampling methods for use in survey procedures; and key experts to contact, to assist with the preparedness for an incursion of these leafminers into Australia. The report follows guidelines for the steps to be undertaken and considered when developing a Response Plan for this pest group. Any Response Plan developed using information in whole or in part from this Contingency Plan must follow procedures as set out in PLANTPLAN and be endorsed by the National Management Group prior to implementation

Gap analysis and economic assessment for protected cropping vegetables in tropical Australia

The project VG16024 aims to increase awareness and information about protected cropping opportunities and technology options for the vegetable industry in the tropics through the identification of gaps in information and potential economic viabilities. Protected cropping of vegetables in Australia (estimated at 1,341 ha) is by large located in temperate climate regions and in proximity to urban areas. In warm climate regions, near and north of the Tropic of Capricorn, the segment of the industry dedicated to producing vegetables using protected cropping technologies is scattered and relatively small (estimated at <80 ha). Vegetable growers in these regions would benefit from technologies that can mitigate risks linked to climate variability and that can help them address current and future market challenges and opportunities. Evidence from overseas, including in tropical regions, and demonstration plots and farmer experiences in the Australian tropics indicate that protective cropping technologies can cost-effectively mitigate the effects of extremes in air temperatures, rainfall, low and high relative humidity, wind, solar radiation, and pests and diseases, all which currently negatively affect yield, quality and consistency of supply. In this report, four regions, two within the tropics (Burdekin dry tropics and Atherton Tablelands) and two located a short distance south of the Tropic of Capricorn (Bundaberg and Carnarvon), are selected as examples of regions where the protected cropping industry is either small or emerging, and has the potential to expand. Vegetable production in these regions is predominantly undertaken outdoors. The establishment of protected cropping enterprises would contribute to an increase in regional production that could service both domestic and export markets. This would be facilitated by the regions’ proximity to road infrastructure, ports and airports but access to some of these market opportunities still need to be developed. In the tropics the availability of medium level, cost-effective protected cropping structures that are effective in removing heat from crops is paramount. In this report, four greenhouse structure designs (high tunnels, passively ventilated greenhouses, retractable roof structures, and net houses) are discussed, and advantages and drawbacks compared. Capsicum, cucumbers, melons, and eggplants are given as examples of vegetable crops suited to warm climates and which can benefit from a protected environment and specific agronomy practices. Possible marketable yields are provided for these crops as well as estimates of production value for a range of size of areas that could potentially establish protected cropping systems. A preliminary economic analysis was carried out for hypothetical production of capsicum crops in different protected cropping scenarios in the tropics. Under the protective structures, management practices, market prices and capsicum yields used in the analysis, preliminary results suggest that protected cropping could be a viable business opportunity for growers in the tropics. Future research investigating the heterogeneity of protected cropping enterprises would serve to further confirm these findings, especially in light of the practical implications of the technology used in a larger number of commercial sites

Gap analysis and economic assessment for protected cropping vegetables in tropical Australia

The project VG16024 aims to increase awareness and information about protected cropping opportunities and technology options for the vegetable industry in the tropics through the identification of gaps in information and potential economic viabilities. Protected cropping of vegetables in Australia (estimated at 1,341 ha) is by large located in temperate climate regions and in proximity to urban areas. In warm climate regions, near and north of the Tropic of Capricorn, the segment of the industry dedicated to producing vegetables using protected cropping technologies is scattered and relatively small (estimated at <80 ha). Vegetable growers in these regions would benefit from technologies that can mitigate risks linked to climate variability and that can help them address current and future market challenges and opportunities. Evidence from overseas, including in tropical regions, and demonstration plots and farmer experiences in the Australian tropics indicate that protective cropping technologies can cost-effectively mitigate the effects of extremes in air temperatures, rainfall, low and high relative humidity, wind, solar radiation, and pests and diseases, all which currently negatively affect yield, quality and consistency of supply. In this report, four regions, two within the tropics (Burdekin dry tropics and Atherton Tablelands) and two located a short distance south of the Tropic of Capricorn (Bundaberg and Carnarvon), are selected as examples of regions where the protected cropping industry is either small or emerging, and has the potential to expand. Vegetable production in these regions is predominantly undertaken outdoors. The establishment of protected cropping enterprises would contribute to an increase in regional production that could service both domestic and export markets. This would be facilitated by the regions’ proximity to road infrastructure, ports and airports but access to some of these market opportunities still need to be developed. In the tropics the availability of medium level, cost-effective protected cropping structures that are effective in removing heat from crops is paramount. In this report, four greenhouse structure designs (high tunnels, passively ventilated greenhouses, retractable roof structures, and net houses) are discussed, and advantages and drawbacks compared. Capsicum, cucumbers, melons, and eggplants are given as examples of vegetable crops suited to warm climates and which can benefit from a protected environment and specific agronomy practices. Possible marketable yields are provided for these crops as well as estimates of production value for a range of size of areas that could potentially establish protected cropping systems. A preliminary economic analysis was carried out for hypothetical production of capsicum crops in different protected cropping scenarios in the tropics. Under the protective structures, management practices, market prices and capsicum yields used in the analysis, preliminary results suggest that protected cropping could be a viable business opportunity for growers in the tropics. Future research investigating the heterogeneity of protected cropping enterprises would serve to further confirm these findings, especially in light of the practical implications of the technology used in a larger number of commercial sites

A Missing Connection: A Review of the Macrostructural Anatomy and Tractography of the Acoustic Radiation

The auditory system of mammals is dedicated to encoding, elaborating and transporting acoustic information from the auditory nerve to the auditory cortex. The acoustic radiation (AR) constitutes the thalamo-cortical projection of this system, conveying the auditory signals from the medial geniculate nucleus (MGN) of the thalamus to the transverse temporal gyrus on the superior temporal lobe. While representing one of the major sensory pathways of the primate brain, the currently available anatomical information of this white matter bundle is quite limited in humans, thus constituting a notable omission in clinical and general studies on auditory processing and language perception. Tracing procedures in humans have restricted applications, and the in vivo reconstruction of this bundle using diffusion tractography techniques remains challenging. Hence, a more accurate and reliable reconstruction of the AR is necessary for understanding the neurobiological substrates supporting audition and language processing mechanisms in both health and disease. This review aims to unite available information on the macroscopic anatomy and topography of the AR in humans and non-human primates. Particular attention is brought to the anatomical characteristics that make this bundle difficult to reconstruct using non-invasive techniques, such as diffusion-based tractography. Open questions in the field and possible future research directions are discussed

Using consensus analysis to assess mental models about water use and management in the Crocodile River catchment, South Africa

The content, structure, and distribution of mental models can be elicited and measured using a variety of methods. In this article we explore a method for eliciting mental models within the context of water use and management in South Africa. This method is consensus analysis, a technique developed in cognitive anthropology. We used it to analyze qualitative data from semistructured interviews, pilesorts, and questionnaires to test quantitatively the degree of sharing and diversity of mental models within and across social groups. The consensus analysis method focused on comparing the mental models of two key stakeholder groups in the Crocodile River catchment in South Africa, i.e., conservationists and irrigators, to better understand the level of consensus between these groups. We specifically investigated the level of agreement regarding: (1) major water users of the Crocodile River, (2) causes of the current problems with flows in the river, (3) consequences of the river not flowing, and 4) priorities for future use. We discuss the results and examine the strengths and challenges of consensus analysis for eliciting and measuring mental models. We also evaluated the usefulness of this method in assisting natural resource managers to identify strategies for improving integrated management of water resources

Developing production guidelines for growing high-value specialty melons for domestic and export markets

Queensland production of melons (Cucumis melo L.), typically rockmelon and honeydew fruits, is seasonal and practiced entirely outdoors. The horticulture industry has limited knowledge about using protected cropping as a technology to mitigate the effects of climate variability in melon crops. Some new specialty melon types now available in Australia require favourable environmental conditions and specific growing practices in order to obtain fruits with good visual and eating quality. Adoption of protected cropping could be a forthcoming technology to add diversity in fruit appearance, flavour and aroma, and guarantee consistent high quality of melons in domestic markets and potential export markets in Asia and NZ. This Agri-Science Queensland Innovation Opportunity project supported primary crop evaluations that contributed to critical information for the development of guidelines to produce specialty melons with protective cropping systems in the tropics. Three melon crops grown between September 2017 and June 2018 tested 21 cultivars of fruit types new to Australia. The management of crops followed specific agronomic practices for soilless production and plant canopy management. Crop performance and visual and eating quality were assessed and a range of desired attributes were identified for rind colour and net patterns, flesh colour, texture and shelf life. There were examples of cultivars with remarkable sweet flesh (total soluble solids up to 16 °Bx) in large fruits. A group of promising cultivars had total marketable yields that ranged from 5.5 to10 kg/m2 with fruit weights that ranged from 0.9 to 2.0 kg/fruit, and where total soluble solids ranged from 12 to 16 °Bx. The outcome of this work prompted a small group of industry stakeholders to consider the development of a melon export program. A subsequent granted project under the Growing Queensland's Food Exports pilot program aims to initially send high quality fruit samples to Asian markets. The Department of Agriculture and Fisheries is providing support with research and development on melon agronomy practices