This is a collection of reports and papers that were used to develop the Framework for Integrated and Habitat Evaluation (FISHE), as well as a selection of supporting materials that can be used during the eleven steps of the data-limited framework. Use the search function below to search for specific resources.
The percentage of unfished lifetime egg production (LEP) has been used to represent persistence in precautionary fisheries management, but estimation of this reference point requires substantial data and it is sensitive to errors in natural mortality rate. We present an estimation method that quantifies the change in LEP by a fishery when only length frequency samples, one early in the fishery and one recent, are available for assessment.
- 32.Evaluating targets and trade-offs among fisheries and conservation objectives using a multispecies size spectrum model
Authors develop, calibrate and apply a multispecies size spectrum model (Mizer model) of the North Sea fish community to assess the response of populations and the community to fishing. The model predicts species' size distributions, abundance, productivity and interactions and therefore provides a single framework for evaluating trade-offs between population status, community and food web structure, biodiversity and fisheries yield. They show that the model can replicate realistic fish population and community structure and past responses to fishing. We assess whether meeting management targets for exploited North Sea populations (fishing species at FMSY) will be sufficient to meet proposed targets for biodiversity and food web indicators under two management scenarios (status quo and FMSY).
- 33.Evaluation of average length as an estimator of exploitation status for the Florida coral-reef fish community
Simulation and empirical analyses were conducted to evaluate the utility and robustness of average length (Lbar) of animals in the exploited population as an estimator of fishing mortality (F), and therefore as an indicator of exploitation status for Florida coral-reef fish.
Example CVA application in a hypothetical Caribbean fishery - meant to be used a helpful reference for practitioners
These example performance indicators and blank templates are intended to be used during the adaptive management planning process. Users should also download the provided paper, Adaptive Fisheries Management for Nearshore Fisheries, in order to ensure that they have a comprehensive understanding of this process. We advise that this process be stakeholder driven in order to ensure transparency around actions that will be taken under each of the potential scenarios.
Document summarizing all the inputs required for, the outputs generated by and the assumptions inherent in each of the evaluation methods presented on the FISHE website.
Documento que resuma todas las entradas necesarias para, las salidas generadas por y los supocisuiones inherentes a cada uno de los métodos de evaluación presentados en el sitio web de FISHE.
Initial paper presenting the Schaefer Biomass Dynamics assessment method: From morphometric data, tagging results and reaction of the stock to fishing, it is inferred that the yellowfin tuna of the Eastern Pacific form a distinct population which intermingles little, if at all, with populations to the westward. Excellent statistics of catch and effort, and records of total catch, available since 1934, during rapid growth of the fishery, have made possible application of a generalized mathematical predator-prey model to estimate the effect of fishing on the population, and the average abundance and yield corresponding to different amounts of fishing effort, and also to estimate the rate of fishing mortality per unit of effort. From serial samples of size composition of catches, and from tagging experiments, it has been possible to determine rates of growth and of total mortality. These kinds of information permit application of the catch-per-recruit model of Beverton and Holt. Combination of the results of application of the Beverton and Holt model and of the generalized predator-prey model, leads to inference of the relationship between stock size and recruitment. The form of the relationship is remarkably similar to the theoretical model developed by W. E. Ricker. These studies, based on the data of the near-surface fishery by baitboats and purse seiners, indicate clearly that the increased intensity of fishing has caused diminution of the stocks to the point where they are somewhat "overfished"-that is, incapable of supporting the maximum sustainable average harvest.
FishPath is a decision support system that allows users to characterize their fishery with respect to (i) available data; (ii) biological/life history attributes of relevant species; (iii) fishery operational characteristics; (iv) socioeconomic characteristics; and (v) governance context. FishPath allows users to identify a subset of management strategy options appropriate for the fishery based on this characterization.
Excel workbook to support the application of the Froese Length-Based Sustainability Indicators, which uses length-frequency catch data to estimate three simple indicators of stock status and trends.