Destructive effects of small-scale shrimp trawl fisheries on by-catch fish assemblage in Hormozgan coastal waters

Document Type : Research Paper

Authors

1 Associat Professor, Fisheries Department, Gorgan Universitu of Agricultural Sciences and Natural Resources, Iran

2 PhD, Fisheries Department, Faculty of Marine Science and Technology, Hormozgan University, Iran

3 PhD., Fisheries Department, Faculty of Marine Science and Technology, Hormozgan University, Iran

4 Associated Professor, Marine Biology Department, Faculty of Science, Hormozgan University, Iran

Abstract

The aim of present study was to determine by-catch composition and contribution of non-standard fish
in small-scale shrimp trawl fisheries in Hormozgan coastal waters. Sampling was performed in 2012
shrimp fishing season by 3 small-scale vessels. At the end of 38 hauls, the samples contained 82
species: 53 teleost taxa contributing 71.8% of the total biomass, 6 elasmobranchs taxa (15.5% of
biomass) and 6 species of invertebrates (12.7% of biomass). Also contribution of teleost,
elasmobranch and invertebrate species was 85.5%, 0.48% and 14.02% from total catch numerically.
Small discard species, large discard fishes, commercial species and shrimp consisted 45.17% (59.34%
of total catch number), 27.84% (1.16% of total catch number), 14.5% (2.53% of total catch number)
and 12.49% (36.97% of total catch number) from total by-catch weight respectively. The highest
Biomass and number of by-catch belonged to small discard fishes with 4329.02 tonnes and
4923244number respectively. On average By-catch-to-shrimp ratio was estimated 6.18:1. Length data
analysis indicated that whole caught specimens of P. argenteus, P. niger, S. commerson, C.
dussumieri, C. nudus, O. ruber, S. forsteri and T. lepturus had a non-standard size for fishing.

Keywords

Main Subjects

References

[1].        Abbaszade, A. 2010. Reproduction biology of Saurida  tumbil In the north of the Persian Gulf. M. Sc. Thesis. Isfahan Technology University. 100pp. (In Persian).
[2].        Alverson, D.L., Freeber, M.H., Murawskiand, S.A., and Pope J.G. 1994. A Global assessment of fisheries bycatch and discard. FAO. Fisheries Technichal. 339. 233 pp.
[3].        Andrew, N.L., Jones, T., Terry, C. and Pratt, R. 1995. Bycatch of an Australian stow net fishery for school prawns (Metapenaeus macleayi). Journal of Fisheries Research. 22:121-136.
[4].        Carpenter K.E. and Niem V.H., 1998. FAO Species Identification Guide for Fishery Purposes. The Living Marine Resources of the Western Central Pacific, vol. 6. FAO, Rome.
[5].        Daliri, M., Paighambari, S.Y., Shabani, M.J. and Davoodi R. 2012.  Shrimp Stock Assessment in Bushehr coastal waters of the Persian Gulf. Caspian Journal of Applied Sciences Research. 1(6): 27-32.3
[6].        Daliri, M., 2012. Investigation of distribution and catch per unit effort of green tiger shrimp, Penaeus semisulcatus (De Haan, 1884) and the effect of physicochemical factors of seawater on its dispersion in the coastal waters of Bushehr province. M. Sc. Thesis. Gorgan University of Agricultural and Natural Resource, 80pp. (In Persian).
[7].        Dastbaz, M. 2011. Study of quantitative composition and species diversity in gillnets in Length Port Township and determination of standard mesh size for Spanish mackerel (Scomberomorus commerson). M. Sc. Thesis Gorgan University of Agricultural and Natural Resource, 88pp. (In Persian).
[8].        Esmaeili, A. 2006. Technical efficiency analysis for the Iranian fishery in the Persian Gulf. ICES Journal of Marine Science. 63: 1759-1764.
[9].        Froese, R. and Pauly, D. 2013. FishBase. Available at: http:// www.fishbase.org, (last accessed: 5 June 2013).
[10].    Froese, R. 2006. Cube law, condition factor and weight-length relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology. 22: 241–253.
[11].    Garcia-Caudillo, C.M., Balmori, J.M. and Ramirez, M.A. 2000. Performance of a bycatch reduction device in the shrimp fishery of the Gulf of California, Mexico. Biological Conservation. 92: 199–205.
[12].    Hall, S.J. and Mainprize, B.M. 2005. Managing by-catch and discards: how much progress are we making and how can we do better?. Fish and Fisheries. 6: 134–155.
[13].    Harrington, J.M., Myers, R.A. and Rosenberg, A.A. 2006. Wasted fishery resources: discarded by-catch in the USA. Fish and Fisheries. 6: 350–61.
[14].    International Union for the Conservation of Nature and Natural Resources (IUCN). 2006. IUCN Red List of Threatened Species. <http://www.iucnredlist.org>. Downloaded on May 4, 2006.
[15].    Iranian Fisheries Organization. 2010. Fisheries statistical Yearbook (2000-2009). 60pp. (In Persian).
[16].    Kampf, J. and Sadrinasab, M. 2006. The circulation of the Persian Gulf: a numerical study. Ocean Science. 2: 27–41.
[17].    Kelleher, K. 2005. Discards in the world’s marine fisheries: an update. Rome: Food and Agriculture Organization of the United Nations, FAO; 2005. 131pp.
[18].    Kumar, B.A. and Deepthi, G.R. 2006. Trawling and by-catch: implications on marine ecosystems. Current Science. 90: 922–31.
[19].    Mohamadikia, D. 2013. Population dynamic of Platycephalus indicus in Bandar Abbas waters. M. Sc. Thesis. Hormozgan University, 90pp. (In Persian).
[20].    Momeni, M. and Kamrani, E. 2006. Reproduction biology of Pampus argenteus in Bandar Abbas waters. Iranian Journal of Marine Science Technology, 3: 53-64. (In Persian).
[21].    Paighambari, S.Y. and Daliri M. 2012. The by-catch composition of shrimp trawl fisheries in Bushehr coastal waters, northern Persian Gulf. Journal of the Persian Gulf (Marine Science). 3(7): 27-36.
[22].    Paighambari, S. Y. 2001. Effects of different Bycatch Reduction Devices (BRDs) in Shrimp trawlers in The Persian Gulf. Ph. D thesis. Tarbiat Modares University. 112pp. (In Persian).
[23].    Parab, M.A. 1998. Maturity and spawning of the catfish Arius thalassinus (Ruppell) off north-west coast of India. Bulletin Fisheries Survey India. 26:32-41.
[24].    Pauly, D., Christensen, V., Pitcher, T.J. and Walters, C.J. 2002. Towards sustainability in world fisheries. Nature.418:689–95.
[25].    Pender, P.J., Willing R.S. and Ramm, D.C. 1992. Northern Prawn Fishery bycatch study: distribution, abundance, size and use of bycatch from a mixed species fishery. Fishery Report No. 26 (Northern Territory Department of Primary Industry and Fisheries), Darwin, Australia, 70 p.
[26].    Queirolo, D., Erzini, K., Hurtado, C.F., Gaete E. and Soriguer M.C. 2011. Species composition and bycatches of a new crustacean trawl in Chile. Fisheries Research, 110: 149–159
[27].    Rainer, S.F. and Munro, I.S.R. 1982. Demersal fish and cephalopod communities of an unexploited coastal area in northern Australia. Australian Journal of Marine and Freshwater. 33: 1039–1055.
[28].    Sparre, P. and Venema, S.C. 1998. Introduction to tropical fish stock assessment, FAO Fisheries Technical Paper. 450p.
[29].    Stobutzki, I.C., Miller, M.J., Jones P. and Salini, J.P. 2001. Bycatch diversity and variation in a tropical Australian penaeid fishery; the implications for monitoring. Fisheries Research. 53: 283-301.
[30].    The World Bank. 2008. The Sunken billions. The economic justification for fisheries reform. Agriculture and rural development.Washington, DC: TheWorld Bank.
[31].    Tonks, M.L., Griffiths, S.P., Heales, D.S., Brewer D.T. and Dell Q. 2008. Species composition and temporal variation of prawn trawl bycatch in the Joseph Bonaparte Gulf, northwestern Australia. Fisheries research. 89: 276-293.
[32].    Valinassab, T., Zarshenas G.A., Fatemi, M.R. and Otobidae S.M. 2006 (a). Bycatch composition of small-scale shrimp trawlers in the Pursian Gulf (Hormuzgan province), Iran. Iran. J. Fish. Sci. 15: 129-138. (In Persian).
[33].    Valinassab, T., Daryanabard, R., Dehghani, R. and Pierceo, G.J. 2006 (b). Abundance of demersal fish resources in the Persian Gulf and Oman Sea. Journal of Marine Biology. 86: 1455-1462.
[34].    Vianna, M. and Almeida, T. 2005. Bony fish bycatch in the southern Brazil pink shrimp (Farfantepenaeus brasiliensis and F. paulensis) fishery. Brazilian Archives of Biology and Technology. 48(4): 28-36.
[35].    Walmsley, S.A., Leslie, R.W. and Sauer, W.H.H. 2007. Bycatch and discarding in the South African demersal trawl fishery. Fisheries Research. 86: 15-30.
[36].    Worm, B., Barbier, E.B., Beaumont, N., Duffy, J.E., Folke, C. and Halpern, B.S. 2006. Impacts of biodiversity loss on ocean ecosystem services. Science, 314: 787–90.

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