Estimate of the relative abundance index for Oman cuttlefish and Purpleback flying squid by effort of the rope trawl on West of the Gulf of Oman

Document Type : Research Paper

Authors

1 Ph.D. Student of Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

2 Ph.D. student, Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Natural Resources, Gorgan, Iran

3 Assistant Professor of Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran

4 Expert of capture and Fishery Office, Iranian Fisheries Organization, Tehran, Iran

Abstract

The present study estimated relative frequency index of Purpleback flying squid and Oman cuttlefish also evaluated the effect of depth, distance, and time of capture (before & after noon) on them. Sampling was in the west of the Gulf of Oman at the spring of 2019. The depth of the Gulf was 208 to 285 meters. The vessel used was an industrial Myctophid trawler and the sampling gear was a rope trawl that operated with the fishing technique in a water column (the bottom panel was maximum 6 meters higher than the bottom of the Gulf). According to field observations, the average catch per unit of effort index in Purpleback flying squid and Oman cuttlefish was estimated to be 7584.22 and 1345.066 gram / hour based on weight and 19.062 and 18.250 number / hour based on number, respectively. Based on the selected models, the variables of depth and distance had a significant effect on catch per unit of effort for Purpleback flying squid (P<0.05). With increasing depth and distance, the catch per unit of effort for squid increased. However, based on the results, no significant effect of the studied variables on the relative abundance index of Oman cuttlefish was observed, given the lack of sufficient research on this theme and the discard caught of these species in Iranian waters, more extensive research to manage their stock in the Gulf of Oman is a need.
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References

Abbaspour Naderi, R., Paighambari, S., Valinassab, T., Ghorbani, R., 2018. Determination the mean Catch per Unit of Area (CPUA) and biomass of Sepia pharaonis Ehrenberg, 1831 and Trichiurus lepturus Linnaeus, 1758 in Bottom Trawl fishery (Sistan and Balochestan waters), Journal of Animal Environment 10(2) 211-216.
Adam, W. and Rees, W.J., 1966. A review of the cephalopod family Sepiidae. Scientific Reports of the John Murray Expedition 1933–1934, 11, 486 p.
Arkhipkin, A.I., Rodhouse, P.G., Pierce, G.J., Sauer, W., Sakai, M., Allcock, L., Arguelles, J., Bower, J.R., Castillo, G., Ceriola, L., Chen, C.S., Chen, X., Diaz-Santana, M., Downey, N., González, A.F., Granados Amores, J., Green, C.P., Guerra, A., Hendrickson, L.C.,  Ibáñez, C., Ito, K., Jereb, P., Kato, Y., Katugin, O.N., Kawano, M., Kidokoro, H., Kulik, V.V., Laptikhovsky, V.V., Lipinski, M.R., Liu, B., Mariátegui, L., Marin, W., Medina, A., Miki, K., Miyahara, K., Moltschaniwskyj, N., Moustahfid, H., Nabhitabhata, J.,  Nanjo, N., Nigmatullin, C.M., Ohtani, T., Pecl, G., Perez, J.A.A., Piatkowski, U., Saikliang, P., Salinas-Zavala, C.A., Steer, M., Tian, Y., Ueta, Y., Vijai, D., Wakabayashi, T., Yamaguchi, T., Yamashiro, C., Yamashita, N. and Zeidberg, L.D., 2015. World squid fisheries. Reviews in Fisheries Science & Aquaculture 23(2) 92-252.
Cabanellas-Reboredo, M., Alós, J., Palmer, M. and Morales-Nin, B., 2012. Environmental effects on recreational squid jigging fishery catches. ICES Journal of Marine Science 69(10) 1823-1830.
Canty, A. and Ripley, B., 2019. boot: Bootstrap R (S-Plus) Functions. R package version 1.3-22.
Hanlon, R., Vecchione, M. and Allcock, L. 2018. Octopus, Squid, and Cuttlefish: A visual, scientific guide to the oceans’ most advanced invertebrates. University of Chicago Press; First edition, 224p.
Hilborn, R. and Walters, C.J., 1992. Quantitative fisheries stock assessment: choice, dynamics and uncertainty. Springer publishing, 575 p.
Jereb, P. and Roper, C.F.E., 2005. Cephalopod of the world. FAO Species Catalogue for Fishery Purposes. 262 p.
Jereb, P. and Roper, C.F.E. 2010. Cephalopods of the world. FAO Species Catalogue for Fishery Purposes. 605 p.
Jereb, P., Roper, C.F.E., Norman, M.D. and Finn, J.K. 2016. Cephalopods of the world. FAO Species Catalogue for Fishery Purposes. 370 p.
Judkins, H., Vecchione, M., Cook, A. and Sutton, T., 2016. Diversity of midwater cephalopods in the northern Gulf of Mexico: comparison of two collecting methods. Marine Biodiversity, 47(3) 647-657.
Katugin, O.N. and Zuev, N.N., 2007. Distribution of cephalopods in the upper epipelagic northwestern Bering Sea in autumn. Reviews in Fish Biology and Fisheries, 17(2-3) 283-294.
King, M. 2007. Fisheries Biology, Assessment and Management. 2th edition. Blackwell publishing. 382 p.
Kleiber, C. and Zeileis, A. 2008. Applied Econometrics with R. New York: Springer-Verlag. ISBN 978-0-387-77316-2. URL https://CRAN.R-project.org/package=AER.
Mohamed, K.S., Sasikumar, G., Koya, K.P.S., Venketesan, V., Kripa, V., Durgekar, R., Joseph, M., Alloycious, P.S., Mani, R. and Vijai, D. 2011. Know... The Master of the Arabian Sea-Purple-Back Flying Squid Sthenoteuthis oualaniensis. NAIP Booklet, pp. 5-10.
Paighambari, S.Y., Daliri, M. and Memarzadeh, M. 2012. The Effects of Jig
Color and Depth Variationon Catch Rates of Purpleback Flying Squid,
Sthenoteuthis oualaniensis (Lesson, 1830) in Iranian Waters of the Oman Sea. Caspian Journal of Applied Sciences Research, 1(7) 1-5.
Parry, M., 2006. Feeding behavior of two ommastrephid squids Ommastrephes bartramii and Sthenoteuthis oualaniensis off Hawaii. Marine Ecology Progress Series, 318, 229-235.
Paschen, M., van Marlen, B. and Stengel, H. 2018. 50years of fishing technology at the University of Rostock.WGFTFB meeting in Hirtshals, Denmark2018.21 p.
Prado, J. and Dremiere, P.Y., 1990. Fisherman’s Workbook. FAO of the United Nations by Fishing News Books, 185 p.
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(1) 149-159.
Quinn II, T.J. and Deriso, R.B., 1999. Quantitative Fish Dynamics, Oxford University Press, 1st edition, 539 p.
R Core Team, 2019. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Austria. https://www.R-project.org/.
Salahi-gezaz, M., Paighambari, S.Y., Abbaspour Naderi R., 2016. Study on Length Structure, Catch Composition, and Catch per Unit Effort of Pharaoh Cuttlefish (Sepia pharaonis) Bottom Trawling in the Gulf of Oman. Journal of Oceanography. 6, 69-76.
Sparre, P. and Venema, S.C., 1998. Introduction to tropical fish stock assessment. Part: 1, Manual FAO Fisheries Technical Paper. No. 306.1, Review 2. 407 p.
Yasumuro, H., Nakatsuru, S. and Ikeda, Y., 2015. Cuttlefish can school in the field. Marine Biology, 162(4) 763-771.
Zuur, A., Ieno, E.N., Walker, N., Saveliev, A.A. and Smith, G.M., 2009. Mixed effects models and extensions in ecology with R. Springer Science & Business Media, 579 p.

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