Marine and Freshwater Research Marine and Freshwater Research Society
Advances in the aquatic sciences
RESEARCH ARTICLE

Evaluating a seasonal, sex-specific size-structured stock assessment model for the American lobster, Homarus americanus

Minoru Kanaiwa A C , Yong Chen A D and Carl Wilson B

A School of Marine Sciences, University of Maine, Orono, ME 04469, USA.

B Maine Department of Marine Resources, Boothbay Harbor, ME 04575, USA.

C Current address: Department of Aqua-Bioscience and Industry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkai, Japan 099-2493.

D Corresponding author. Email: ychen@maine.edu

Marine and Freshwater Research 59(1) 41-56 http://dx.doi.org/10.1071/MF07121
Submitted: 28 June 2007  Accepted: 5 December 2007   Published: 25 January 2008

Abstract

Many models of different complexities are developed for fisheries stock assessment, and yet few have been rigorously evaluated for their performance in capturing fisheries population dynamics. This causes confusion about when a model should be used or not in assessing fisheries resources. This is especially true for models with complex structures. The present study evaluated the performance of a seasonal, sex-specific and size-structured stock assessment model with respect to the temporal pattern of recruitment, observation errors associated with input data, process errors and violation of model assumptions for the American lobster Homarus americanus. Using an individual-based lobster simulator, a series of lobster fisheries with different characteristics were simulated and the model was applied to the simulated data to estimate key fisheries parameters. Estimated values were then compared with the true values in the simulated fisheries to evaluate the model’s ability to capture the temporal trend in stock abundance, biomass and recruitment, and to identify factors that might result in model failure. Results show that this newly developed lobster stock assessment model performs well in capturing the dynamics of the lobster population under a wide range of conditions. Temporal trends in natural mortality and biased estimates of growth parameters posed the most serious problems. The present study shows the importance of model evaluation.

Additional keywords: model performance, population dynamics, simulation.


References

Atlantic States Marine Fisheries Commission (ASMFC) (2000). American Lobster Stock Assessment Report. ASMFC American Lobster Stock Assessment, Washington D.C. Available at http://www.asmfc.org/speciesDocuments/lobster/annualreports/stockassmtreports/lobsteradvisoryreport00.pdf (Accessed on November 1, 2007)

Atlantic States Marine Fisheries Commission (ASMFC) (2004). American Lobster Stock Assessment Model Technical Review, Terms of Reference and Panel Report, ASMFC Special Report No. 82, Washington D.C.

Atlantic States Marine Fisheries Commission (ASMFC) (2006). Terms of Reference and Advisory Report to the American Lobster Stock Assessment Peer Review. ASMFC Report 06–03, Washington D.C. Available at http://www.asmfc.org/speciesDocuments/lobster/annualreports/stockassmtreports/lobsterAdvisoryReport06.pdf (Accessed on 1 November 2007)

Breen P. A.Andrew N. L.Kendrick T. H.2000Stock assessment of PAU 5B for 1998–99. National Institute of Water and Atmospheric Research, Wellington, New Zealand.

Briggs P. T.1985Movement of the American lobster off the south shore of Long Island, New York.New York Fish and Game322025


Chen Y.1996A Monte Carlo study on impacts of the size of subsample catch on estimation of fish stock parameters.Fisheries Research26207223
doi:10.1016/0165-7836(95)00447-5

Chen Y.Fournier D. A.1999 Impacts of atypical data on Bayesian inference and robust Bayesian approach in fisheries.Canadian Journal of Fisheries and Aquatic Sciences5615251533

Chen Y.Wilson C.2002A simulation study to evaluate impacts of uncertainty on the assessment of American lobster fishery in the Gulf of Maine.Canadian Journal of Fisheries and Aquatic Sciences5913941403doi:10.1139/F02-102

Chen Y., and Rajakaruna H. (2003). Impacts of quantity and quality of fisheries data on stock assessment. In ‘Proceedings of the 3rd World Fisheries Congress’. (American Fisheries Society: Bethesda, MD.)

Chen Y.Kanaiwa M.Wilson C.2005Developing and evaluating a Bayesian stock assessment framework for the American lobster fishery in the Gulf of Maine.New Zealand Journal of Freshwater and Marine Sciences39645660

Chen Y.Sherman S.Wilson C.Sowles J.Kanaiwa M.2006A comparison of two fishery-independent survey programs used to define population structure of American lobster, Homarus americanus, in the Gulf of Maine.Fishery Bulletin104247255


Chen Y.Breen P. A.Andrew N. L.2000Impacts of outliers and mis-specification of priors on Bayesian fisheries-stock-assessment.Canadian Journal of Fisheries and Aquatic Sciences5722932305


Cobb J. S.Wang D.Campbell D. B.Rooney P.1989Speed and direction of swimming by postlarvae of the American lobster.Transactions of the American Fisheries Society1188286
doi:10.1577/1548-8659(1989)118<0082:SADOSB>2.3.CO;2

Collie J. S.Sissenwine M. P.1983Estimating population size from relative abundance data measured with error.Canadian Journal of Fisheries and Aquatic Sciences4018711879

Cooper R. A., and Uzmann J. R. (1980). Ecology of juvenile and adult Homarus. In ‘The Biology and Management of Lobsters. Vol. 2’. (Eds J. S. Cobb and R. Phillips.) pp. 97–141. (Academic Press: New York.)

Fogarty M. J.Idoine J. S.1988Application of a yield and egg production model based on size to an offshore American lobster population.Transactions of the American Fisheries Society117350362
doi:10.1577/1548-8659(1988)117<0350:AOAYAE>2.3.CO;2

Fogarty M. J.Gendron L.2004Biological references points for American lobster (Homarus americanus) populations: limits to exploitation and the precautionary approach.Canadian Journal of Fisheries and Aquatic Sciences6113921403doi:10.1139/F04-140

Fournier D. A.1996‘AUTODIFF: a C++ array language extension with automatic differentiation for use in nonlinear modelling and statistics.’ (Nanaimo, Canada: Otter Research.)

Fournier D. A.Sibert J. R.Majkowski J.Hampton J.1990MULTIFAN: a likelihood-based method for estimating growth parameters and age0-composition from a multiple length frequency data set illustrated using data from southern bluefin tuna (Thinnus maccoyii).Canadian Journal of Fisheries and Aquatic Sciences47301317

Harding G. C.Trites R. W.1989Dispersal of Homarus americanus larvae in the Gulf of Maine from Brown bank.Canadian Journal of Fisheries and Aquatic Sciences4610771078

Hilborn R., and Walters C. (1992). ‘Quantitative Fisheries Stock Assessment: Choice, Dynamics, and Uncertainty.’ (Chapman and Hall: New York.)

Kanaiwa M.Chen Y.Hunter M.2005Assessing stock assessment framework for the green sea urchin fishery in Maine, USA.Fisheries Research7496115
doi:10.1016/J.FISHRES.2005.03.006

Lawton P., and Lavalli K. L. (1995). Postlarval, juvenile, adolescent and adult ecology. In ‘Biology of the lobster Homarus americanus’. (Ed. J. F. Factor.) pp. 47–88. (Academic Press: New York.)

National Research Council (NRC) (1997). ‘Improving Fish Stock Assessments.’ (National Academy Press: Washington, D.C.)

Palma A. T.Steneck R. S.Wilson J.1999Settlement-driven, multiscale demographic patterns of large benthic decapods in the Gulf of Maine.Journal of Experimental Marine Biology and Ecology241107136doi:10.1016/S0022-0981(99)00069-6

Quinn T., and Deriso R. B. (1999). ‘Quantitative Fish Dynamics.’ (Oxford University Press: Oxford.)

Sheehy M. R. J.2001Implications of protracted recruitment for perception of the spawner-recruit relationship.Canadian Journal of Fisheries and Aquatic Sciences58641644doi:10.1139/CJFAS-58-4-641

Steneck R. S.Wilson C. J.2001Long-term and large scale spatial and temporal patterns in demography and landings of the American lobster, Homarus americanus, in Maine.Marine and Freshwater Research5213031319doi:10.1071/MF01173

Wahle R. A.Steneck R. S.1992Habitat restrictions in early benthic life: experiments on habitat selection and in situ predation with the American lobster.Journal of Experimental Marine Biology and Ecology15791114doi:10.1016/0022-0981(92)90077-N

Wilson C. J. (1998). Bathymetric and spatial patterns of settlement in American lobsters, H. americanus, in the Gulf of Maine: Insights into processes controlling abundance. Masters Thesis. University of Maine, Orono, ME.



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