Abstract
Following our experiences in Italy in Mazara del Vallo and Chioggia Marinas, we had another one in Tunisia in Sfax Marina. Aim of this paper is a biomechanical risk assessment of fishermen working on a vessel smaller than those previously analyzed in Italy and in a different socio-cultural context. The task that involved most of the crew’s working time was the sorting. We assessed this task by ISO Standard 11226 and 3DSSPP software. The maximum recommended exertion duty cycle, listed as a percentage of job time from the 14 analyzed frames with 3DSSPP, was between 2.3 and 14%. This data confirms that workers’ postures during sorting task were critical. In these task workers flexed the trunk over 90° for approximately 10 min for every catch. Both maximum exposure time (1 min) and maximum acceptable trunk flexion (60°) threshold, defined by ISO 11226, were exceeded. Moreover, it should be considered that ISO 11226 does not consider boat instability that significantly impacts biomechanical risks. The maximum posture holding time before the occurence of fatigue, according to Potvin’s mathematical model, is lower than the time held by workers. Trunk maximal values were between 35s and 125s and the lower limb joints values rarely exceeded two minutes of maximum exposure. Estimated values of the percentage of Maximum Voluntary Contraction (%MVC) were between 35% and 61% for the trunk and between 31.4% and 39.2% for the neck. The lower limbs %MVC values were remarkable for the hips (between 28% and 68%), knees (between 31% and 88%) and ankles (between 27% and 94%). This new experience confirmed medium-high risk levels during the sorting process. Furthermore given the reduced size of the boat, the crew couldn’t improve their working conditions with low-cost solutions, as in Italy. For operational problems, manual handling of the fish crates wasn’t assessed although the placement of the freezer on the deck of the boat, instead of the bottom floor as in Mazara del Vallo, is certely less stressful.
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References
Silvetti, A., Munafò, E., Ranavolo, A., Iavicoli, S., Draicchio, F.: Ergonomic risk assessment of sea fishermen Part I: manual material handling. In: Goossens, R.H.M. (ed.) Advances in Social & Occupational Ergonomics. AISC, vol. 487, pp. 325–332. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-41688-5_29
Silvetti, A., Munafò, E., Ranavolo, A., Iavicoli, S., Draicchio, F.: Ergonomic risk assessment of sea fishermen Part II: upper limb repetitive movements. In: Goossens, R.H.M. (ed.) Advances in Social & Occupational Ergonomics. AISC, vol. 487, pp. 333–340. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-41688-5_30
Silvetti, A., et al.: Ergonomic risk assessment of sea fisherman Part III: manual handling and static posture. In: Goossens, R.H.M., Murata, A. (eds.) AHFE 2019. AISC, vol. 970, pp. 379–392. Springer, Cham (2020). https://doi.org/10.1007/978-3-030-20145-6_38
Sønvisen, S.A., Thorvaldsen, T., Holmen, I.M., Øren, A.: Work environment and health in the fishing fleet: results from a survey amongst Norwegian fishers. Int. Marit. Health 68(4), 203–210 (2017)
Sandsund, M., et al.: Musculoskeletal symptoms among workers in the commercial fishing fleet of Norway. Int. Marit. Health 70(2), 100–106 (2019)
Øren, A., et al.: Sickness absence and hospitalization among workers on board norwegian fishing vessels. J. Agromed. 24(4), 357–363 (2019). https://doi.org/10.1080/1059924X.2019.1640150
Chaffin, D.B., Erig, M.: Three-dimensional biomechanical static strength prediction model sensitivity to postural and anthropometric inaccuracies. IIE Trans. 23(3), 215–227 (1991)
Chaffin, D.B.: Biomechanical Modeling for Simulation of 3D Static Human Exertions Computer Applications in Ergonomics, Occupational Safety, and Health. Elsevier Publishers, Amsterdam (1992)
Jäger, M.: Extended compilation of autopsy-material measurements on lumbar ultimate compressive strength for deriving reference values in ergonomic work design: the revised Dortmund recommendations. EXCLI J. 17, 362–385 (2018)
Waters, T.R., et al.: Revised NIOSH equation for the design and evaluation of manual lifting tasks. Ergonomics 36(7), 749–776 (1993)
Gallagher, S., Marras, W.S.: Tolerance of the lumbar spine to shear: a review and recommended exposure limits. Clin. Biomech. 27(10), 973–978 (2012)
ACGIH. TLVs and BEIs. 2015. 202-204 ISBN 978-1-607260-77-6
Potvin, J.: Predicting maximum acceptable efforts for repetitive tasks: an equation-based on duty cycle. Hum. Factors 54(2), 175–188 (2012)
Potvin, J.: An equation to predict maximum acceptable loads for repetitive tasks based on duty cycle: evaluation with lifting and lowering tasks. Work 41(Supplement 1), 397–400 (2012)
ISO 11226:2000/Cor 1:2006 Ergonomics - Evaluation of static working postures
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Silvetti, A. et al. (2021). Ergonomic Risk Assessment of Sea Fisherman Part IV: Tunisian Chapter. In: Goonetilleke, R.S., Xiong, S., Kalkis, H., Roja, Z., Karwowski, W., Murata, A. (eds) Advances in Physical, Social & Occupational Ergonomics. AHFE 2021. Lecture Notes in Networks and Systems, vol 273. Springer, Cham. https://doi.org/10.1007/978-3-030-80713-9_20
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