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Management Demands (management + demand)

Distribution by Scientific Domains

Life Sciences	50%

Selected Abstracts

Demographic models and the management of endangered species: a case study of the critically endangered Seychelles magpie robin

JOURNAL OF APPLIED ECOLOGY, Issue 5 2003
Ken Norris
Summary 1Demographic models are assuming an important role in management decisions for endangered species. Elasticity analysis and scope for management analysis are two such applications. Elasticity analysis determines the vital rates that have the greatest impact on population growth. Scope for management analysis examines the effects that feasible management might have on vital rates and population growth. Both methods target management in an attempt to maximize population growth. 2The Seychelles magpie robin Copsychus sechellarum is a critically endangered island endemic, the population of which underwent significant growth in the early 1990s following the implementation of a recovery programme. We examined how the formal use of elasticity and scope for management analyses might have shaped management in the recovery programme, and assessed their effectiveness by comparison with the actual population growth achieved. 3The magpie robin population doubled from about 25 birds in 1990 to more than 50 by 1995. A simple two-stage demographic model showed that this growth was driven primarily by a significant increase in the annual survival probability of first-year birds and an increase in the birth rate. Neither the annual survival probability of adults nor the probability of a female breeding at age 1 changed significantly over time. 4Elasticity analysis showed that the annual survival probability of adults had the greatest impact on population growth. There was some scope to use management to increase survival, but because survival rates were already high (> 0·9) this had a negligible effect on population growth. Scope for management analysis showed that significant population growth could have been achieved by targeting management measures at the birth rate and survival probability of first-year birds, although predicted growth rates were lower than those achieved by the recovery programme when all management measures were in place (i.e. 1992,95). 5Synthesis and applications. We argue that scope for management analysis can provide a useful basis for management but will inevitably be limited to some extent by a lack of data, as our study shows. This means that identifying perceived ecological problems and designing management to alleviate them must be an important component of endangered species management. The corollary of this is that it will not be possible or wise to consider only management options for which there is a demonstrable ecological benefit. Given these constraints, we see little role for elasticity analysis because, when data are available, a scope for management analysis will always be of greater practical value and, when data are lacking, precautionary management demands that as many perceived ecological problems as possible are tackled. [source]

The Restoration Gene Pool Concept: Beyond the Native Versus Non-Native Debate

RESTORATION ECOLOGY, Issue 3 2003
T. A. Jones
Abstract Restoration practitioners have long been faced with a dichotomous choice of native versus introduced plant material confounded by a general lack of consensus concerning what constitutes being native. The "restoration gene pool" concept assigns plant materials to one of four restoration gene pools (primary to quaternary) in order of declining genetic correspondence to the target population. Adaptation is decoupled from genetic identity because they often do not correspond, particularly if ecosystem function of the disturbed site has been altered. Because use of plant material with highest genetic identity, that is, the primary restoration gene pool, may not be ultimately successful, material of higher order pools may be substituted. This decision can be made individually for each plant species in the restored plant community in the scientific context that ecosystem management demands. The restoration gene pool concept provides a place for cultivars of native species and noninvasive introduced plant material when use of native-site material is not feasible. The use of metapopulation polycrosses or composites and multiple-origin polycrosses or composites is encouraged as appropriate. The restoration gene pool concept can be implemented as a hierarchical decision-support tool within the larger context of planning seedings. [source]

Parenting, autonomy and self-care of adolescents with Type 1 diabetes

CHILD: CARE, HEALTH AND DEVELOPMENT, Issue 1 2009
C. Dashiff
Abstract Background During adolescence diabetes creates a juncture of very complex disease management demands with developmental needs, including the striving of adolescents for greater autonomy. Parents' concerns and fears about the teen's diabetes self-management abilities during this time can heighten parental attachment behaviour and affect the parents' ability to support autonomy development necessary for effective self-care. Maternal parenting processes may be especially important for those adolescents who have Type 1 diabetes because mothers are the primary caregivers. Purpose Based on attachment theory, the aim was to test a model of the influence of mother,adolescent developmental conflict, maternal separation anxiety and maternal inhibition of autonomy and relatedness on cognitive autonomy and self-care of adolescents with Type 1 diabetes. Method A total of 131 families with an adolescent, aged 11,15 years, contributed data annually across three waves. Mothers and adolescents completed paper-and-pencil measures and two interaction scenarios that were coded by trained staff from audio-tapes. The adolescent also completed a structured interview and questionnaire to assess self-care. Results Maternal separation anxiety when adolescents were 11,15 years of age directly predicted cognitive autonomy at 1-year follow-up, and that cognitive autonomy was directly related to self-care 1 year later, but did not mediate between separation anxiety and self-care. Conclusions Future investigation of the influence of separation anxiety of parents on adolescent autonomy development is warranted, as well as the contribution of autonomy development to diabetes self-management behaviours of adolescents. [source]

Waiting for Enron: The Unstable Equilibrium of Auditor Independence Regulation

JOURNAL OF LAW AND SOCIETY, Issue 3 2006
David Kershaw
A primary function of auditor independence regulation is to ensure that any financial incentives auditors may have to approve misleading or inaccurate accounting are outweighed by market and regulatory deterrents to compromising an auditor's independence. This article is an inquiry into the current state of this incentive equilibrium in the United Kingdom: the possible costs and benefits that may be incurred by auditors if they elect to acquiesce to management's demands to accept problematic accounting. It argues that the equilibrium position currently incentivizes a rational auditor to acquiesce. On the one hand, the article demonstrates that the recent evolution of audit firm revenue streams has provided auditors with a substantial incentive to compromise their independence and provided management with credible sanctions to pressurize them to do so. On the other hand, the article shows that regulatory and market costs of acquiescence do not counterbalance the benefits of acquiescence. [source]