Evaluating alternative management strategies for bigeye tuna, Thunnus obesus, in the Indian Ocean


  • Yuhe Tong College of Marine Sciences, Shanghai Ocean University - Hainan Provincial Fisheries Research Institute
  • Xinjun Chen College of Marine Sciences, Shanghai Ocean University - The Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education - International Center for Marine Studies, Shanghai Ocean University
  • Yong Chen School of Marine Sciences, University of Maine - International Center for Marine Studies, Shanghai Ocean University




Thunnus obesus, management strategy, harvest control rule, Monte Carlo simulation, Indian Ocean, age-structured production model


Bigeye tuna (Thunnus obesus) support a large commercial fishery in the Indian Ocean. However, explicit management strategies and harvest control rules are yet to be developed for the management of this fishery. We used a stochastic age-structured production model as an operating model to evaluate several potential management strategies under different assumptions of stock productivity. Five management strategies—constant fishing mortality, constant catch, quasi-constant catch, constant escapement, and status-dependent strategies—were evaluated and compared using the performance indicators including average catch, average spawning stock biomass, variation in catch, average fishing mortality and lowest biomass during the time period considered in the simulation. This study shows that (1) for the constant catch strategy, an annual catch of 90000 t would result in a low risk of stock being overfished while obtaining a stable catch; (2) for the constant fishing mortality strategy fishing mortality of 0.3 per year could yield a higher catch, but might have a high probability (64%) of stock dropping below the spawning stock biomass (SSB) that could achieve maximum sustainable yield (SSBmsy); and (3) for the quasi-constant catch strategy an annual catch of 110000 t was sustainable if the current SSB was higher than SSBmsy. Constant escapement and status-dependent strategies were robust with respect to different levels of virgin recruitment and steepness. This study suggests that it is important to incorporate uncertainties associated with key life history, fisheries and management processes in evaluating management strategies.


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Allen R.L. 2010. International management of tuna fisheries: arrangements, challenges and a way forward. FAO Fisheries and Aquaculture Technical Paper. No. 536. Rome, FAO, 45 pp.

Anonymous, 2008. Review of CCMs' Implementation of, and Compliance with, Conservation and Management Measures. WCPFC-TCC4-2008/31 (Rev.1), 22 pp.

Bentley N., Langley A. D. 2012. Feasible stock trajectories: a flexible and efficient sequential estimator for use in fisheries management procedures. Can. J. Fish. Aquat. Sci. 69(1): 161-177. http://dx.doi.org/10.1139/f2011-143

Bentley N., Breen P.A., Kim S.W., Starr P.J. 2005. Can additional abundance indices improve harvest control rules for New Zealand rock lobster (Jasus edwardsii) fisheries? N. Z. J. Mar. Freshw. Res. 39(3): 629-644. http://dx.doi.org/10.1080/00288330.2005.9517341

Breen P.A. 2009. A voluntary harvest control rule for a New Zealand rock lobster (Jasus edwardsii) stock. N. Z. J. Mar. Freshw. Res. 43(4): 941-951. http://dx.doi.org/10.1080/00288330909510052

Butterworth D.S., Punt A.E. 1999. Experiences in the evaluation and implementation of management procedures. ICES J. Mar. Sci. 56: 985-998. http://dx.doi.org/10.1006/jmsc.1999.0532

Butterworth D.S. 2007. Why a management procedure approach? Some positives and negatives. ICES J. Mar. Sci. 64: 613-617. http://dx.doi.org/10.1093/icesjms/fsm003

Chen Y., Paloheimo J.E. 1995. A robust regression analysis of recruitment in fisheries. Can. J. Fish. Aquat. Sci. 52: 993-1006. http://dx.doi.org/10.1139/f95-098

Davies N., Hoyle S.D., Harley S.J., Langley A.D., Hampton J. 2011. Stock Assessment of Bigeye Tuna in the Western and Central Pacific Ocean. WCPFC-SC7-2011/SA-WP-02, 133 pp.

Deroba J.J., Bence J.R. 2008. A review of harvest policies: Understanding relative performance of control rules. Fish. Res. 94: 210-223. http://dx.doi.org/10.1016/j.fishres.2008.01.003

Herrera M., Pierre L. 2009. Estimation of catch-at-size and total catch per area for tropical tuna species. IOTC-2009-WPTT-12, 32p.

Hjerne O., Hansson S. 2001. Constant catch or constant harvest rate? - The Baltic Sea cod (Gadus morhua L.) fishery as a modelling example. Fish. Res. 53: 57-70. http://dx.doi.org/10.1016/S0165-7836(00)00266-6

IATTC, 2009. Resolution on a Multiannual Program for the Conservation of Tuna in the Eastern Pacific Ocean in 2009-2011 (Resolution C-09-01). Inter-American Tropical Tuna Commission, 80th meeting, California, USA, 4 pp. http://www.iattc.org/PDFFiles2/Resolutions/C-09-01-Tuna-conservation-2009-2011.pdf

IOTC, 2008. Executive summaries of the status of the major ocean tunas. IOTC-2008-SC-03[E+F] -rev1, 44 pp.

IOTC, 2010. For the conservation and management of tropical tunas stocks in the IOTC area of competence (Resolution 10/01). In: Collection of Resolution and Recommendations by the Indian Ocean Tuna Commission. Resolution 10/01, pp. 164-168. http://www.iotc.org/files/proceedings/misc/ComReportsTexts/resolutions_E.pdf

IOTC, 2012. Report of the Fifteenth Session of the IOTC Scientific Committee. IOTC–2012–SC15–R[E], 288 pp.

Ishimura G., Punt A.E., Huppert D.D. 2005. Management of fluctuating fish stocks: the case of Pacific whiting. Fish. Res. 73: 201-216. http://dx.doi.org/10.1016/j.fishres.2004.12.002

Kell L.T., O'Brien C.M., Smith M.T., Stokes T.K., Rackham B.D. 1999. An evaluation of management procedures for implementing a precautionary approach in the ICES context of North Sea plaice (Pleuronectes platessa L.). ICES J. Mar. Sci. 56: 834-845. http://dx.doi.org/10.1006/jmsc.1999.0544

Kolody D., Herrera M. 2010. Exploration of Indian Ocean Bigeye Tuna Stock Assessment Sensitivities 1952-2008 using Stock Synthesis. IOTC-2010-WPTT-04, 75 pp.

Nakamura E.L., Uchiyama J.H. 1966. Length-weight relations of Pacific tunas. In: Manar T.A. (ed.) Proceeding of the Governor's conference on central Pacific Fisheries Resources. Honolulu, State of Hawaii, pp. 197-201.

Needle C.L. 2008. Management strategy evaluation for North Sea haddock. Fish. Res. 94: 141-150. http://dx.doi.org/10.1016/j.fishres.2008.03.004

Nishida T., Rademeyer R. 2011. Stock and risk assessments on bigeye tuna (Thunnus obesus) in the Indian Ocean based on AD Model Builder implemented Age-Structured Production Model (ASPM). IOTC-WPTT13-2010-42, 23 pp.

Nishida T., Shono H., Okamoto H., Suzuki Z. 2002. Updated bigeye tuna (Thunnus obesus) resource analyses in the Indian Ocean - CPUE, ASPM (MSY) and projections. IOTC Proc. 5: 475-481.

Nishida T., Shono H. 2006. Updated stock assessment of bigeye tuna (Thunnus obesus) resource in the Indian Ocean by the agestructured production model (ASPM) analyses (1960-2004). IOTC-WPTT-2006-22, 19 pp.

Polacheck T., Klaer N.L., Millar C., Preece A.L. 1999. An initial evaluation of management strategies for the southern bluefin tuna fishery. ICES J. Mar. Sci. 56: 811-826. http://dx.doi.org/10.1006/jmsc.1999.0554

Poreeyanond D. 1994. Catch and size groups distribution of tunas caught by purse seining survey in the Arabian Sea, Western Indian Ocean, 1993. In: Ardill J.D. (ed.) Proceedings of the Expert Consultation on Indian Ocean Tunas, 5th Session, Mahé, Seychelles, pp. 53-54.

Punt A.E., Hobday D. 2009. Management strategy evaluation for rock lobster, Jasus edwardsii, off Victoria, Australia: accounting for uncertainty in stock structure. N. Z. J. Mar. Freshw. Res. 43: 485-509. http://dx.doi.org/10.1080/00288330909510017

Restrepo V.R., Powers J.E. 1999, Precautionary control rules in US fisheries management: specification and performance. ICES J. Mar. Sci. 56, 846-852. http://dx.doi.org/10.1006/jmsc.1999.0546

Ricard D., Basson M. 2002. Application of an age-structured production model (ASPM) to the Indian Ocean bigeye tuna (Thunnus obesus) resource. IOTC-WPTT-02-07, 14 pp.

Shono H., Nishida T., Okamoto H. 2004. Future projections for bigeye tuna in the Indian Ocean. IOTC-WPTT-04-19, 14 pp.

Shono H., Okamoto H., Senba K. 2006. Preliminary Stock Assessment for Bigeye Tuna in the Indian Ocean using Stock Synthesis II (SS2). IOTC-2006-WPTT-18, 12 pp.

Shono H., Satoh K., Okamoto H., Nishida T. 2009. Updated stock assessment for bigeye tuna in the Indian Ocean up to 2008 using Stock Synthesis III (SS3). IOTC-2009-WPTT-20, 9 pp.

Smith A.D.M. 1994. Management strategy evaluation: the light on the hill. In: Hancock D.A. (ed.), Population Dynamics for Fisheries Management. Australian Society for Fish Biology, Perth, Western Australia, pp. 249-253. PMCid:PMC1137169

Stequert R., Conand F. 2003. Age and growth of bigeye tuna in the western Indian Ocean. IOTC-WPTT-03-Info2, 10 pp.

Thompson G. 1999. Optimizing harvest control rules in the presence of natural variability and parameter uncertainty. Proceedings, 5th NMFS NSAW. NOAA Tech. Memo. NMFSF/SPO-40, 45 pp.

U.S. Sustainable Fisheries Act, 1996. Magnuson-Stevens Fishery Conservation and Management Act. Section 301. Walters C. 1998. Evaluation of quota management policies for developing fisheries. Can. J. Fish. Aquat. Sci. 55: 2691-2705.

Walters C., Parma A.M. 1996. Fixed exploitation rate strategies for coping with effects of climate change. Can. J. Fish. Aquat. Sci. 53: 148-158. http://dx.doi.org/10.1139/f95-151

WCPFC, 2008. Conservation and Management Measures for Bigeye and Yellowfin Tuna in the Western and Central Pacific Ocean (CMM 08-01). Western and Central Pacific Fisheries Commission fifth regular session. 42 pp. http://www.wcpfc.int/system/files/documents/conservation-and-managementmeasures-and-resolutions/conservation-and-managementmeasures/CMM%202008-01%20%5BBigeye%20and%20yellowfin%5D.pdf

Zhang Y.Y., Chen Y., Wilson C. 2011. Developing and evaluating harvest control rules with different biological reference points for the American lobster fishery in the Gulf of Maine. ICES J. Mar. Sci. 68: 1511-1524. http://dx.doi.org/10.1093/icesjms/fsr071

Zhang Y.Y., Chen Y., Zhu J.F., Tian S.Q., Chen X.J. 2013. Evaluating harvest control rules for bigeye tuna (Thunnus obesus) and yellowfin tuna (Thunnus albacares) fisheries in the Indian Ocean. Fish. Res. 137: 1-8. http://dx.doi.org/10.1016/j.fishres.2012.08.013




How to Cite

Tong Y, Chen X, Chen Y. Evaluating alternative management strategies for bigeye tuna, Thunnus obesus, in the Indian Ocean. Sci. mar. [Internet]. 2013Sep.30 [cited 2024Feb.29];77(3):449-60. Available from: https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1465




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