AN INVERSE DEMAND APPROACH TO RECREATION FISHING SITE CHOICE AND IMPLIED MARGINAL VALUES

An alternative methodology for determining marginal willingness to pay values for recreational fishing trips is developed based on inverse demand systems and the distance function. Our empirical application uses joint estimation of several species-specific site equations from a recreation fishing data set. Results are compared to a random utility model.Resource /Energy Economics and Policy,

EMPIRICAL SPECIFICATION REQUIREMENTS FOR TWO-CONSTRAINT MODELS OF RECREATION DEMAND

Theoretical restrictions implied by the two-constraint recreation demand model are developed. The structure necessary to specify empirical models shows that most current models of recreation incorporate time in a manner inconsistent with theory. Results are applicable to all recreationists and are particularly useful to those with endogenous marginal values of time.Research Methods/ Statistical Methods, Resource /Energy Economics and Policy,

ESTIMATING THE OPPORTUNITY COST OF RECREATION TIME IN AN INTEGRABLE 2-CONSTRAINT COUNT DEMAND MODEL

How researchers treat the opportunity cost of time substantially influences recreation demand parameter and welfare estimates. This paper presents a utility-theoretic and implementable approach, estimating the shadow value of time jointly with recreation demands for coastal activities, using a generalization of the semilog demand system in a two-constraint model.Consumer/Household Economics, Demand and Price Analysis,

Structural Controls of the MacFarlane Geothermal System, Humboldt County, Nevada: New Insights Based on Detailed Geologic Mapping, Shallow Temperature Surveys, and Magnetic Data

Detailed geologic mapping, structural analysis, magnetic and two-meter temperature data, integrated with previous datasets, constrain the structural controls of the MacFarlane geothermal system. MacFarlane hot springs and the travertine fissure ridges lie within a relay ramp. The relay ramp is formed between two overlapping, north-northeast-striking, west-dipping Holocene normal faults exposed in Lake Lahontan sediments. Other mapped faults near the hot spring include a north-striking, west-dipping Tertiary fault east of MacFarlane hot springs. The highest temperature gradient is found at the projected intersection between the Tertiary and north-northeast-striking Quaternary fault, ~2.5 km northeast of the hot spring (Sibbett et al., 1982; Swanberg and Bowers, 1982). Our new data suggest other controls involving the relay ramp geometry of the Holocene faults. The anomalous orientation of the travertine fissure ridge motivated this study of the structural controls of the geothermal system. MacFarlane hot spring is located on the eastern margin of the Black Rock Desert, ~85 km west of Winnemucca, in Humboldt County, Nevada. The active hot spring emerges from the west end of an east-trending travertine fissure ridge, which is ~180 m long. The travertine fissure ridge is up to ~2 m tall and ~5 m wide, and has a central fissure along its long axis. The orientation of the travertine fissure ridge indicates local north-south extension, which is inconsistent with the regional west-northwest extension of the northwestern Basin and Range province. The anomalous travertine orientation is due to fractures that occurred during formation of a relay ramp between two overlapping fault segments

Animal Morality: Control Without Reflective Self-Awareness

Non-human animals can act morally by acting on the basis of moral emotions such as concern without being morally responsible in the sense of deserving praise or blame. They can unconsciously select from different motivations and so have the requisite control over their behavior for moral normativity yet lack awareness of their reasons as reasons and so lack the self-reflection and understanding required for full moral responsibility. This is an alternative to Mark Rowlands’ compatibilist construal of non-human animals as moral subjects

Junior Recital: Sabina M. White, Flute

Kemp Recital Hall Saturday Evening April 20, 1996 7:00p.m

Implementing an Early Alert Workflow Process in Higher Education to Enhance Retention and Student Engagement

This case study examines the implementation of an early alert intervention system designed to enhance retention and student course engagement at a large suburban, public two-year degree-granting college. The focus of the study was to investigate the work-flow process and labor requirements for operationalizing the in-house intervention protocol, utilizing a Success Coach model. This paper documents the intervention procedures and reports findings pertaining to faculty time commitment and participation, frequency and prevalence of raised alert flags, and labor requirements for conducting student outreach. Cost efficiency and effectiveness are discussed, as are alternative approaches for implementation, including the use of automation and commercially available early alert software solutions. Implications of findings for the operationalization of the success coach model are considered and suggestions for further investigation are discussed. This case study investigated preservice teachers’ perceptions of their use of “backdoor praise” (BDP)—praise that is simultaneously delayed, indirect, and embedded in teacher comments—during their final internship. Three participants representing elementary, middle, and high schools, were observed to collect baseline data on their natural use of BDP. The researcher then explained BDP and conducted two more observations of each preservice teacher and their use of BDP. Twenty-eight incidents involving 21 students were recorded; 16 students maintained long-term on-task behavior ranging from three minutes to nearly 60 minutes post-BDP. The preservice teachers were interviewed after each observation, and they all reported positive student and whole-class reactions to BDP; in addition, the student teachers reported that their use of positive comments increased while their use of negative comments and reprimands decreased. These results suggest that direct instruction in BDP helped the preservice teachers to become more aware of their own praise talk

MULTISPECIES REVENUE FUNCTION ESTIMATION FOR NORTH PACIFIC GROUNDFISH FISHERIES

Multiproduct, multispecies revenue functions are estimated for the midwater and bottom-trawl pollock fisheries off Alaska. There are strong year and seasonal effects on coefficient estimates, and the technology is joint in outputs for each major operation type. The model is a step toward prediction of fishery regulatory effects.Resource /Energy Economics and Policy,

Transcriptome profiling of a spirodiclofen susceptible and resistant strain of the European red mite Panonychus ulmi using strand-specific RNA-seq

Background: The European red mite, Panonychus ulmi, is among the most important mite pests in fruit orchards, where it is controlled primarily by acaricide application. However, the species rapidly develops pesticide resistance, and the elucidation of resistance mechanisms for P. ulmi has not kept pace with insects or with the closely related spider mite Tetranychus urticae. The main reason for this lack of knowledge has been the absence of genomic resources needed to investigate the molecular biology of resistance mechanisms. Results: Here, we provide a comprehensive strand-specific RNA-seq based transcriptome resource for P. ulmi derived from strains susceptible and resistant to the widely used acaricide spirodiclofen. From a de novo assembly of the P. ulmi transcriptome, we manually annotated detoxification enzyme families, target-sites of commonly used acaricides, and horizontally transferred genes implicated in plant-mite interactions and pesticide resistance. In a comparative analysis that incorporated sequences available for Panonychus citri, T. urticae, and insects, we identified radiations for detoxification gene families following the divergence of Panonychus and Tetranychus genera. Finally, we used the replicated RNA-seq data from the spirodiclofen susceptible and resistant strains to describe gene expression changes associated with resistance. A cytochrome P450 monooxygenase, as well as multiple carboxylcholinesterases, were differentially expressed between the susceptible and resistant strains, and provide a molecular entry point for understanding resistance to spirodiclofen, widely used to control P. ulmi populations. Conclusions: The new genomic resources and data that we present in this study for P. ulmi will substantially facilitate molecular studies of underlying mechanisms involved in acaricide resistance