Incorporation of changes in habitat quantity and quality into density-dependent population models

Englert, Thomas; Wells, Alan W.; Norris, Robert A.

doi:10.1016/s1462-9011(00)00057-5

Cited by 4 publications

(1 citation statement)

References 18 publications

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“…Information on age-specific growth, mortality and fecundity values, year (and sometimes age) specific fishing rates, carrying capacity (K) and the intrinsic rate of population increase (r) are needed. It is also being widely recognized that K and r can change in response to density-dependent and density-independent factors [26,27].…”

Section: Predictive Biological Methodsmentioning

confidence: 99%

Adverse Environmental Impact: A Consultant’s Perspective

Wells¹,

Englert²

2002

The Scientific World JOURNAL

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Environmental consultants are in a unique position to address the practical aspects of a working definition of “adverse environmental impact” (AEI) within Section 316(b) of the Clean Water Act. In our work with the electric utility industry, attorneys, and regulatory agencies, we have encountered numerous and sometimes conflicting interpretations as to what constitutes AEI. In our over 30 years of experience, we have applied most of the approaches suggested for addressing this issue, including biostatistical methods, trend analysis, time series methods, conditional mortality rate models, stock-recruitment models, equivalent adult models, and ecosystem models. In our experience, the paradigm most helpful in bringing about agreement among stakeholders is to (1) create a model of operating scenarios, (2) use empirical data from on-site studies to parameterize the model, (3) convert losses by life stage to equivalent adult losses, (4) convert equivalent adult losses to economic value, and (5) compare scenarios on an economic basis.

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Section: Predictive Biological Methodsmentioning

confidence: 99%

Adverse Environmental Impact: A Consultant’s Perspective

Wells¹,

Englert²

2002

The Scientific World JOURNAL

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Direct and indirect estimates of the productive capacity of fish habitat under Canada’s Policy for the Management of Fish Habitat: where have we been, where are we now, and where are we going?

MinnsCharles

RandallRobert

SmokorowskiKaren

et al. 2011

Can. J. Fish. Aquat. Sci.

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No net loss of productive capacity (PC) of fish habitat has been the central concept guiding Canadian fish habitat management policy since 1986. The purpose of this paper is to describe the concept of PC, to review the history and application of the fish habitat management policy in Canada, and to provide a critical review of the range of potential approaches to estimating PC. The approaches were grouped by their central focus: habitat, individual, population, and community–ecosystem. A set of case studies is used to illustrate the use of some approaches drawn from freshwater and marine contexts. Ten components to assessing no net loss of PC were developed and used in the review of approaches for evaluating potential limitations. The review also highlighted the likely future direction of method development, with increasing emphasis on dynamic models integrating population responses to habitat supply characteristics. More work needs to be done to turn research-based metrics of PC into practical operational management assessment tools and to better quantify the link between habitat structure and function and fisheries productivity. The evolving approaches to measure PC reinforce the ties that fish habitat management has to the emerging practices in ecosystem-based management.

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DISCUSSION Model Accuracy and Resolution

2003

Defining and Assessing Adverse Environmental Impact From Power Plant Impingement and Entrainment of Aquatic Organisms

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Incorporation of changes in habitat quantity and quality into density-dependent population models

Cited by 4 publications

References 18 publications

Adverse Environmental Impact: A Consultant’s Perspective

Adverse Environmental Impact: A Consultant’s Perspective

Direct and indirect estimates of the productive capacity of fish habitat under Canada’s Policy for the Management of Fish Habitat: where have we been, where are we now, and where are we going?

DISCUSSION Model Accuracy and Resolution

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