Corresponding author: [email protected] ABSTRACT: The Venus’ fly trap (Dionaea muscipula Ellis) is a unique carnivorous plant listed as a Species of Concern within the native range of southeastern North Carolina and northeastern South Carolina. Although several large nature preserves support Venus’ fly trap populations, illegal harvest is considered a factor in long-term population declines. ...

The population effects of harvest depend on complex interactions between density dependence, seasonality, stage structure, and management timing. Here we present a periodic nonlinear matrix population model that incorporates seasonal density dependence with stage-selective and seasonally selective harvest. To this model, we apply newly developed perturbation analyses to determine how population...

Pond carrying capacity is largely determined by management practices. Earlier work on semiintensive culture of tilapia using manure or inorganic fertilizers indicated that carrying capacity might reach 2,000 to 3,000 kg/ha (Diana et al. 1991a, b; KnudHansen et al. 1991). As stocking density is increased in fertilized ponds, carrying capacity remains largely the same and density-dependent growth...

Pond carrying capacity is largely determined by management practices. Earlier work on semiintensive culture of Nile tilapia (Oreochromis niloticus) using manure or inorganic fertilizers indicated that carrying capacity might reach 2,000 to 3,000 kg/ha (Diana et al. 1991a, b; Knud-Hansen et al. 1991). As stocking density is increased in fertilized ponds, carrying capacity remains largely the sam...

This paper uses data from an actual fishery to construct a tractable, dynamic model to compare expected profit and its variance, optimal stock size, optimal harvest rate, and optimal fishing effort under different management regimes under uncertainty. The results provide a comparison of instrument choice between a total harvest control and a total effort control under uncertainty, an original m...

In 2002 the Board of Game authorized Alaska’s first permit hunts specifically for calf moose (Alces alces). We promoted these calf hunts to help stabilize a high-density, food-stressed moose population and to compensate for declining harvests of bulls. Low harvest rates of cows (= 1% of the prehunt cow population, 1996–2001) were tightly controlled by the public. High harvest rates of bulls (21...

Executive Summary Introduction Recreational fishing represents a popular and highly valued use of marine resources, with participation by a large percentage of the U.S. population. Nonetheless, many recreational fisheries, including a number of fisheries in the Gulf of Mexico (GOM) recreational reef fish complex, show trends towards shorter seasons, smaller bag limits and more restrictive size ...

An effective way to increase utilization and reduce costs in datacenters is to co-locate their latency-critical services and batch workloads. In this paper, we describe systems that harvest spare compute cycles and storage space for co-location purposes. The main challenge is minimizing the performance impact on the services, while accounting for their utilization and management patterns. To ov...

Unpredictable environmental fluctuations are a major problem in fisheries. To mitigate these uncertainties, reserves are advocated to help ensure population persistence, reduce population and harvest variance, provide a ‘hedge’ against management failures and increase resilience. Using recent insights from the modelling of marine reserves, we propose a six-step process for establishing and adap...

Sustainable harvest, the extraction of game without affecting population viability, is a desirable approach to the use of wildlife. However, overharvest has been responsible for the decline of many wildlife populations globally, so there is an urgent need to balance human requirements while avoiding the severe depletion of wild populations. Northern common eiders Somateria mollissima borealis a...