Investigating morphological factors and differences between groups of Indean squid (Uroteuthis duvaucelii) in the Persian Gulf and Oman Sea

Document Type : Morphology

Authors

1 Department of Marine Biology, Bandar abbas branch, Islamic Azad University, Bandar abbas, Iran

2 Institute of Fisheries Research, Agricultural Research and Training Organization, Tehran, Iran, POBox: 6116-14155

Abstract

In this study, a discriminant analysis was carried out to compare the morphological variation among the Indian squid (Uroteuthis duvaucelii) collected from four regions in the Persian Gulf and Oman Sea (two regions in the Persian Gulf (Bushehr waters and Western Strait of Hormoz) and two regions in the Oman Sea (Sistan and Balochestan waters and Eastern Strait of Hormoz). The most important variables were investigated factor analysis with principle component analysis (PCA). Indian squids were sampled by stern bottom trawlers and further 21 morphological factors were investigated. The results indicated that in the main component analysis, two components were formed, the first and second components contains 54.24  and 81.50 % of the total variance respectively. The second component consists of four arms in the U.duvaucelii. Investigating the difference between groups by discriminant analysis method showed that three functions were formed (P<0.05) and based on  U.duvaucelii from the four regions can be divided into three groups, two inhabiting in the Persian Gulf, and one group in the Oman Sea.

Keywords


  1. Anderson, F.E.; Bergman, A.; Cheng, S.H.; Pankey, M.S. and Valinassab, T., 2014. Lights out: the evolution of bacterial bioluminescence in Loliginidae. Hydrobiologia. Vol. 725, pp: 189-203.
  2. Borges, T.C., 1995. Discriminant analysis of geographic variation in hard structures of Todarodes sagittatus from the North Atlantic. Marine Science Symposia. Vol. 199, pp: 433-440.
  3. Chen, X.; Lu, H.; Liu, B.; Chen, Y.; Li, S. and Jin, M., 2012. Species identification of Ommastrephes bartramii, Dosidicus gigas, Sthenoteuthis oualanieeusis and Illex argentinue (Ommastrephidae) using beak morphological variables. Scientia Marina. Vol. 73, No. 3, pp: 473-481.
  4. FAO Yearbook. 2010. Fishery statistics-capture production 86. Rome: Food and Agriculture organization of the United Nations. 200 p.
  5. Jereb, P. and Roper, C.F.E., 2010. Cephalopods of the world. Volume 2. FAO Species Catalogue Foe Fishery Purposes. 610 p.
  6. Liao, C.H.; Liu, T.Y. and Hung, C.Y., 2010. Morphometric variation between the Swordtip (Photololigo edulis) and Mitre (P. chinensis) squids in the waters off Taiwan. Journal of marine science and technology. Vol. 18, No. 3,
    pp: 405-412.
  7. Silas, E.G.; Nair, P. and Sarvesan, R., 1982. New record of a Loligind squid, Doryteuthis sibogae (Cephalopoda: Loliginidae), From Indian waters. Central Marine Fisheries research Institue. pp: 281-287.
  8. Sims, D.W.; Genner, M.J.; Southward, A.J. and Hawkins, S.J., 2001. Timing of squid migration reflects North Atlantic climate variability. Proceedings of Royal Society B. No. 268. pp: 2607-2611.
  9. Smith, J.M.; Macleod, C.D; Valavanis, V.; Hastie, L.; Valinassab, T.; Bailey, N.; Santos, M.B. and Pierce,
    G.J., 2013.
    Habitat and distribution of post-recruitlife stage of the squid Loligo forbesii. Deep Sea Research. Vol. 95, pp: 145-159.
  10. Thioulouse, J.; Chessel, D.; Doledec, S. and Olivier, J.M., 1997. ADE- 4: ecological data analysis: exploratory and euclidean methods in environmental Sciences. University of Lyon, Lyon. 119 p.
  11. Zakaria, M.Z., 2000. Age and growth studies of oceanic squid, Sthenoteuthis oualaniensis using Statoliths in the south China Sea, Area III, western Philippines. Southeast Asian Fisheries Development Center. pp: 118-134.