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Ocean Science Journal

, Volume 53, Issue 4, pp 655–665 | Cite as

Fishery-induced Inter-annual Changes in the Mean Trophic Level, the Northern Sea of Oman off the Iranian Coast, 2002–2011

  • Sakineh Mashjoor
  • Fatemeh Heidary Jamebozorgi
  • Ehsan Kamrani
Article
  • 20 Downloads

Abstract

Ecosystem-based management is one of the most important approaches that may lead to reducing the impacts of fishing on ecosystems. In this context, we have assessed the impact of Iranian coastal fishing (using landing data of 49 exploited species) on the ecosystem of the North Sea of Oman (Sistan and Baluchestan Province), during the last decade (2002–2011), with emphasis on testing the occurrence of the “fishing downˮ phenomenon. The Mean Trophic Level (MTL) and Fishing-in-Balance (FiB) index are two indicators that we used for analysis. The data indicated that the increased total landings in this region might be related to the exploitation of marine fishery resources especially with regard to large pelagic fish. Over the past decade, moderate decreasing trends in MTL and an increasing trend in the FiB-index were observed. In this regard, an upward trend in the spatial expansion factor and also a downward trend in the piscivory index and in Primary Production Required (PPR) in the time period could all indicate a spatial expansion toward deep waters, the catching of the large pelagic piscivorous species, such as tuna, and a sign of fishing pressures on the ecosystem. The results suggest a range of fishery exploitation patterns throughout the food web but it seems that these patterns are not a consequence of ʻfishing downʼ. We suggest that the monitoring research be continued in this region and these indicators should be used to make fisheries management decisions and to prevent the continuance of this trend in future.

Keywords

mean trophic level fishing-in-balance fisheries management fishing down marine food web Oman Sea 

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References

  1. Agnew D, Pearce J, Pramod G, Peatman T, Watson R, Beddington JR, Pitcher TJ (2009) Estimating the worldwide extent of illegal fishing. PLoS One 4:4570CrossRefGoogle Scholar
  2. Al-Abdulrazzak D, Zeller D, Belhabib D, Tesfamichael D, Pauly D (2015) Total marine fisheries catches in the Persian/Arabian Gulf from 1950 to 2010. Reg Stud Mar Sci 2:28–34CrossRefGoogle Scholar
  3. Alhabsi MS, Malaysia TDI, Mustapha NHN (2011) Fisheries sustainability in Oman. J Econ Sustain Dev 2(7):35–49Google Scholar
  4. Arias-Gonzales EJ, Nunes-Lara E, Gonzales-alas C, Galzin R (2004) Trophic models for investigation of fishing effect on coral reef ecosystems. Ecol Model 172:197–212CrossRefGoogle Scholar
  5. Al-Sabbagh T, Dashti J (2009) Post-invasion status of Kuwait’s fin-fish and shrimp fisheries (1991–1992). World J Fish Mar Sci 1(2):94–96Google Scholar
  6. Babouri K, Pennino MG, Bellido JM (2014) A trophic indicators toolbox for implementing an ecosystem approach in data-poor fisheries: the Algerian and Bou-Ismail Bay examples. Sci Mar 78S1:37–51CrossRefGoogle Scholar
  7. Belwal R, Belwal S, Al Jabri O (2015) The fisheries of oman: a situation analysis. Mar Policy 61:237–248CrossRefGoogle Scholar
  8. Bhathal B, Pauly D (2008) Fishing down marine food webs and spatial expansion of coastal fisheries in India, 1950–2000. Fish Res 91:26–34CrossRefGoogle Scholar
  9. Caddy JF, Garibaldi L (2000) Apparent changes in the trophic composition of world marine harvests: the perspective from the FAO capture database. Ocean Coast Manage 43:615–655CrossRefGoogle Scholar
  10. Caddy JF, Csirke J, Garcia SM, Grainger RJL (1998) How pervasive is “Fishing down marine food webs”? Science 282:1383CrossRefGoogle Scholar
  11. Christensen V, Pauly D (1992) ECOPATH II-a software for balancing steady-ecosystem models and calculating network characteristics. Ecol Model 61:169–185CrossRefGoogle Scholar
  12. Coll M, Navarro J, Palomera I (2013) Ecological role, fishing impact, and management options for the recovery of a Mediterranean endemic skate by means of food web models. Biol Conserv 157:108–120CrossRefGoogle Scholar
  13. Cury P, Bakun A, Crawford RJM, Jarre A, Quiñones RA, Shannon LJ, Verheye HM (2000) Small pelagics in upwelling systems: patterns of interaction and structural changes in “wasp-waist” ecosystems. ICES J Mar Sci 57:603–618CrossRefGoogle Scholar
  14. Dadzie S, Manyala JO, Abou-Seedo F (2005) Aspects of the population dynamics of Liza klunzingeri in the Kuwait Bay. Cybium 29(1):13–20Google Scholar
  15. Daliri M, Paighambari SY, Shabani MJ, Pouladi M, Davoodi R (2012) Length-weight and length-girth relationships, relative weight and relative condition factor of four commercial fish species of Northern Persian Gulf. Annu Rev Res Biol 2:15–26Google Scholar
  16. Daliri M, Kamrani E, Paighambari SY (2015) Illegal shrimp fishing in Hormozgan inshore waters of the Persian Gulf. Egypt J Aquat Res 41:345–352CrossRefGoogle Scholar
  17. Esmaeili A (2006) Technical efficiency analysis for the Iranian fishery in the Persian Gulf. ICES J Mar Sci 63:1759–1764CrossRefGoogle Scholar
  18. FAO (2013) Fishery and aquaculture country profiles: the Sultanate of Oman-part II narrative. https://doi.org/www.fao.org/fishery/facp/OMN Accessed 15 Nov 2016Google Scholar
  19. Greenstreet SPR, Hall SJ (1996) Fishing and ground-fish assemblage structure in the north-western North Sea: an analysis of longterm and spatial trends. J Anim Ecol 65:577–598CrossRefGoogle Scholar
  20. Gulland JA (1987) The effect of fishing on community structure. S Afr J Marine Sci 5:839–849CrossRefGoogle Scholar
  21. Haedrich RL, Barnes SM (1997) Changes over time of the size structure in an exploited shelf fish community. Fish Res 31:229–239CrossRefGoogle Scholar
  22. Hirawake T, Tobita K, Ishimaru T, Satoh H, Morinaga T (1998) Primary production in the ROPME Area. In: Otsuki A, Abdulraheem MY, Reynolds RM (eds) Offshore environment of the ROPME sea area after the war-related oil spill. Terra Scientific, Tokyo, pp 181–191Google Scholar
  23. Hornborg S, Belgrano A, Bartolino V, Valentinsson D, Ziegler F (2013a) Trophic indicators in fisheries: a call for re-evaluation. Biol Lett 9(1):20121050CrossRefGoogle Scholar
  24. Hornborg S, Svensson M, Nilsson P, Ziegler F (2013b) By-catch impacts in fisheries: utilizing the IUCN red list categories for enhanced product level assessment in seafood LCAs. Environ Manage 52(5):1239–1248CrossRefGoogle Scholar
  25. Jaureguizar AJ, Milessi AC (2008) Assessing the sources of the fishing down marine food web process in the Argentine-Uruguayan Common Fishing Zone. Sci Mar 72(1):25–36CrossRefGoogle Scholar
  26. Link J, Garrison LP (2002) Changes in piscivory associated with fishing induced changes to the finfish community on Georges Bank. Fish Res 55:71–86CrossRefGoogle Scholar
  27. Milessi AC, Arancibia HS, Neira S, Defeo O (2005) The mean trophic level of Uruguayan landings during the period 1990–2001. Fish Res 74:223–231CrossRefGoogle Scholar
  28. Nergi SK (2014) A review of IRAN Fisheries Data & Statistics with emphasis tuna fishes. In: Present to 10th Session of the Working party on Data Collection and Statistics (WPDCS10) Seychelles, Victoria, 2–4 December 2014, IOTC–2014–WPDCS10-12 Rev2Google Scholar
  29. Pauly D, Palomares ML (2005) Fishing down marine food web: it is far more pervasive than we thought. B Mar Sci 76(2):197–211Google Scholar
  30. Pauly D, Watson R (2005) Background and interpretation of the ‘Marine Trophic Index’ as a measure of biodiversity. Philos T R Soc B 360:415–423CrossRefGoogle Scholar
  31. Pauly D, Christensen V, Guenette S, Pitcher TJ, Sumaila UR, Walters CJ, Watson R, Zeller D (2002) Towards sustainability in world fisheries. Nature 418:689–695CrossRefGoogle Scholar
  32. Pauly D, Christensen V, Froese R, Palomares ML (2000a) Fishing down aquatic food webs. Am Sci 88:46–51CrossRefGoogle Scholar
  33. Pauly D, Christensen V, Walters C (2000b) Ecopath, Ecosim, and Ecospace as tools for evaluating ecosystem impact of fisheries. ICES J Mar Sci 57:697–706CrossRefGoogle Scholar
  34. Pauly D, Christensen V, Dalsgaard J, Froese R, Torres F (1998) Fishing down marine food webs. Science 279:860–863CrossRefGoogle Scholar
  35. Pauly D, Christensen V (1995) Primary production required to sustain global fisheries. Nature 374:255–257CrossRefGoogle Scholar
  36. Piontkovski SA, Al-Gheilani HMH, Jupp BP, Al-Azri AR, Al-Hashmi KA (2012) Interannual changes in the Sea of Oman ecosystem. Open Mar Biol J 6:38–52CrossRefGoogle Scholar
  37. Planning and Programming Department (2003) Fishery statistics yearbook (1992–2002). Iran Fisheries Company, Tehran, 60 pGoogle Scholar
  38. Rashid Al-Kiyumi F, Al-kharusi L, Nishida T, Al-Siyabi B (2013) Standardization of kawakawa (Euthynnus affinis) catch rates of drift gillnet fisheries in Sultanate of Oman. In: Third Working Party on Neritic Tunas, Bali, Indonesia, 2–5 July 2013, IOTC–WPNT03 31Rev 2Google Scholar
  39. Shannon L, Coll M, Bundy A, Gascuel D, Heymans JJ, Kleisner K, Lynam CP, Piroddi C, Tam J, Travers-Trolet M, Shin Y (2014) Trophic level-based indicators to track fishing impacts across marine ecosystems. Mar Ecol-Prog Ser 512:115–140CrossRefGoogle Scholar
  40. Shokri MR, Fatemi SMR, Crosby MP (2005) The status of butterfly fishes (Chaetodontidae) in the northern Persian Gulf. Aquat Conserv 15:91–99CrossRefGoogle Scholar
  41. Swift SA, Bower AS (2003) Formation and circulation of dense water in the Persian/Arabian Gulf. J Geophys Res 108:3004CrossRefGoogle Scholar
  42. Torres MA, Coll M, Heymans JJ, Christensen V, Sobrino I (2013) Food-web structure of and fishing impacts on the Gulf of Cadiz ecosystem (South-western Spain). Ecol Model 265:26–44CrossRefGoogle Scholar
  43. Travers M, Watermeyer K, Shanon LJ, Shin YJ (2010) Changes in food web structure under scenarios of overfishing in the southern Benguela: comparison of the Ecosim and OSMOSE modelling approaches. J Marine Syst 79:101–111CrossRefGoogle Scholar
  44. Valinassab T, Daryanabard R, Dehghani R, Pierceo GR (2006) Abundance of demersal fish resources in the Persian Gulf and Oman Sea. J Mar Biol Assoc UK 86:1455–1462CrossRefGoogle Scholar
  45. Vivekanandan E, Srinath M, Kuriakose S (2005) Fishing the marine food web along the Indian coast. Fish Res 72:241–252CrossRefGoogle Scholar
  46. Willemse N, Pauly D (2004a) Reconstruction and interpretation of marine fisheries catches from Namibian water, 1950–2000. In: Sumaila UR, Steinshamn SI, Boyer D, Skogen MD (eds) Namibia’s fisheries: ecological, economic and social aspects. Eburon, Netherlands, pp 99–112Google Scholar
  47. Willemse N, Pauly D (2004b) Ecosystem overfishing: a Namibian case study. In: Chavance P, Ba M, Gascuel D, Vakily M, Pauly D (eds) Proceeding of the international symposium on “Marine Fisheries, Ecosystems and Societies in West Africa: Half a Century of Change”, Dakar, 24–28 June 2002, pp 253–260Google Scholar
  48. Zhou S, Smith ADM, Punt AE, Richardson AJ, Gibbs M, Fulton EA, Pascoe S, Bulman C, Bayliss P, Sainsbury K (2010) Ecosystem-based fisheries management requires a change to the selective fishing philosophy. P Natl Acad Sci USA 107(21): 9485–9489CrossRefGoogle Scholar

Copyright information

© Korea Institute of Ocean Science & Technology (KIOST) and the Korean Society of Oceanography (KSO) and Springer Nature B.V. 2018

Authors and Affiliations

  • Sakineh Mashjoor
    • 1
  • Fatemeh Heidary Jamebozorgi
    • 1
  • Ehsan Kamrani
    • 2
  1. 1.Department of Marine Biology, Faculty of Marine Science and TechnologyUniversity of HormozganBandar AbbasIran
  2. 2.Department of Fisheries, Faculty of Marine Science and TechnologyUniversity of HormozganBandar AbbasIran

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