Results 1 to 10 of about 22,723 (97)

Surplus production models: a practical review of recent approaches

Reviews in Fish Biology and Fisheries, 2022
Peer ...
Marta Cousido-Rocha, Maria Grazia Pennino, Francisco Izquierdo, Anxo Paz, Davinia Lojo, Amina Tifoura, Mohamed Yosri Zanni, Santiago Cerviño   +7 more
openaire   +4 more sources

An alternative surplus production model [PDF]

Ecological Modelling, 2015
In this work we present a novel surplus production model for fisheries stock assessment. Our goal is to enhance parameter estimation and fitting speed. The model employs a production function that differs from the canonical logistic (Schaefer) and Gompertz (Fox) functions, but is still connected to the Pella-Tomlinson formulation.
Rankin, Peter Sheldon, Lemos, Ricardo T.
openaire   +3 more sources

Good practices for surplus production models [PDF]

Fisheries Research
Surplus production models (SPMs) have a long history in fisheries ecology and are important for the assessment and management of marine species and stocks. However, the implementation, application, and usage of these models vary across regions and case studies.
Kokkalis, A.; id_orcid 0000-0002-9662-6272, Berg, C.W.; id_orcid 0000-0002-3812-5269, Kapur, M.S., Winker, H., Jacobsen, N.S., Taylor, M.H., Ichinokawa, M., Miyagawa, M., Medeiros-Leal, W., Nielsen, J.R.; id_orcid 0000-0002-2833-3873, Mildenberger, T.K.; id_orcid 0000-0002-6631-7524   +10 more
openaire   +2 more sources

MINING SURPLUS: MODELING JAMES A. SCHMITZ'S LINK BETWEEN COMPETITION AND PRODUCTIVITY [PDF]

International Economic Review, 2018
AbstractJames A. Schmitz documents, in a well‐known case study (Journal of Political Economy 113 (2005), 582–625), a dramatic rise in productivity in the American and Canadian iron‐ore industry following an increase in competition from Brazil. Prior to the increased competition, the industry was not competitive.
Jeremy Greenwood, David Weiss
openaire   +2 more sources

Bayesian surplus production model with serial autocorrelation

Marine and Fishery Sciences, 2019
Presentation is made of a simple surplus production model called Surplus Production Model with Serial Autocorrelation (MPECAS in Spanish) since it considers as a unique assumption that the surplus production shows a serial correlation and has no explicit functional relation with biomass.
Hernández †, Daniel R., Rodríguez, Julieta S., Hernández †, Daniel R., Rodríguez, Julieta S.   +3 more
openaire   +4 more sources

Comparison of models for estimating surplus productions and methods for estimating their parameters [PDF]

Journal of the Korean society of Fisheries Technology, 2013
It was compared the estimated parameters by the surplus production from three different models, i.e., three types(Schaefer, Gulland , and Schnute) of the traditional surplus production models, astock production modelincorporating covariates (ASPIC ) model and amaximum entropy (ME ) model.
Youjung Kwon, Chang Ik Zhang, Hee Dong Pyo, Young Il Seo   +3 more
openaire   +1 more source

Assessment of the Maine Lobster Fishery with Surplus Production Models [PDF]

North American Journal of Fisheries Management, 1986
Abstract A long series of catch and effort data was available for assessment of the impact of fishing on the American lobster (Homarus americanus) population off the coast of Maine and the data indicated both the ascending and descending limbs of the equilibrium stock production curve. The logistic and the Fox surplus production models were applied and
openaire   +1 more source

Aggregate surplus production models for demersal fishery resources of the Gulf of Maine [PDF]

Marine Ecology Progress Series, 2012
We developed surplus production models for 12 demersal fish species in the Gulf of Maine at the single-species and aggregate-species levels. Summed single-species production model reference points were higher than estimates from the aggregate surplus production model.
MJ Fogarty, WJ Overholtz, JS Link
openaire   +1 more source

Surplus Production Model Accuracy in Populations Affected by a No-Take Marine Protected Area [PDF]

Marine and Coastal Fisheries, 2012
Abstract Marine protected areas (MPAs) are increasingly used as a tool in fisheries management. However, implementation of an MPA violates common assumptions for fishery stock assessments that provide estimates of abundance and fishing mortality for management.
Jennifer S. Pincin, Michael J. Wilberg
openaire   +1 more source

Logistic Surplus-Production Model with Explicit Terms for Growth, Mortality, and Recruitment [PDF]

Transactions of the American Fisheries Society, 1984
Abstract Conventional interpretations of the logistic equation and the logistic surplus-production model appear to indicate that regulation of population size occurs as a result of competition for resources among the recruited members of a population. Compensation for fishing mortality may involve increased growth of adults and an increase in fecundity,
openaire   +1 more source