Indian Journal of Geo-Marine Sciences

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A unique occurrence of large-sized diamondback squid Thysanoteuthis rhombus (Troschel, 1857) in the Gulf of Mannar


Affiliations
1 ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India
 

The presence of the large-sized diamondback squid Thysanoteuthis rhombus(Troschel, 1857) in the Gulf of Mannar biosphere was confirmed after a two-decade absence, based on a single specimen observed during landings at the Pamban lighthouse Fish Landing Centre. A squid measuring 633 mm in mantle length and weighing 15.1kg was caught in the hook and line at a depth of 20 m. The discovery of this species in the Gulf of Mannar unequivocally confirms that the population is still present in the ecosystem.

Keywords

Diamondback Squid, Gulf of Mannar, Hook and Line, Mantle Length.
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  • Roper C F E & Jerez P, Family Thysanoteuthidae, In: Cephalopod of the World. An Annotated and Illustrated Catalogue of Species Known to Date, Vol 2, Myopsid and Oegopsid Squids, edited by Jerez P & Roper C F E, FAO Species Catalogue for Fishery Purposes (FAO, Rome), No 4 (2) (2010) pp. 384.

  • Barratt I & Allcock L, Thysanoteuthis rhombus(amended version of 2014 assessment), The IUCN Red List of Threatened Species, (2020), e.T163228A177249178. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T163228A177249178.en

  • Filippova J A, New data on the Cephalopoda of the Indian Ocean, Proc Symp Mollusca, 168 (1968) 257–264.

  • Kasim M, Marichamy R, Rajapackiam S & Balasubramanian T S, Rare squid, Thysanoteuthis rhombusTroschel from the Gulf of Mannar, India, J Mar Biol Assoc India, 39 (1-2) (1998) 182–184.

  • Mohamed K S, Kripa V & Joseph M, Occurrence of deep-sea squids in commercial trawl catches from Cochin, Mar Fish Infor Serv T & E Ser, 167 (2001) 5–7.

  • Chesalin M V & Zuyev G V, Pelagic cephalopods of the Arabian Sea with an emphasis on Sthenoteuthis oualaniensis, Bull Mar Sci, 71 (2002) 209–221.

  • Sundaram S, Hotagi J S & Kamble S K, Record of oceanic squid Thysanoteuthis rhombusoff Maharashtra Coast, Mar Fish Infor Serv T & E Ser, 191 (2007) p. 28.

  • Batcha H, Thangavelu R, Poovannan P & Srinivasan G, Rare occurrence of diamondback squid Thysanoteuthis rhombus (Troschel, 1867) off Chennai coast, Mar Fish Infor Serv T & E Ser, 201 (2009) 14–15.

  • Baby K G, Huge diamondback squid (Thysanoteuthis rhombus) landed at Munambam Fisheries Harbour, Mar Fish Infor Serv T & E Ser, 209 (2011) p. 21.

  • Sajikumar K K, Sasikumar G,Venkatesan V, Vidya R, Alloycious P S, et al., Distribution, age and growth of the diamondback squid, Thysanoteuthis rhombus(Cephalopoda: Thysanoteuthidae) from the tropical Arabian Sea, Fish Res, 224 (2020) p. 105478.

  • Roper C F E, Family Thysanoteuthidae Keferstein, 1866, FAO Species Catalogue, Vol. 3, Cephalopods of the World, (1984) 187–188.

  • Nishimura S, Notes on the occurrences and biology of the oceanic squid Thysanoteuthis rhombus Troschel in Japan, Publications of the Seto Marine Biological Laboratory, 14 (1966) 327–349.

  • Bower J R & Miyahara K, The diamond squid (Thysanoteuthis rhombus): a review of the fishery and recent research in Japan, Fish Res, 73 (1–2) (2005) 1–11. DOI: 10.1016%2Fj.fishres.2005.01.020

  • Miyahara K, Ota T, HatayamaJ, Mitsunaga Y, Goto T, et al., Tagging studies on the diamond squid (Thysanoteuthis rhombus) in the western Sea of Japan, Bull Jpn Soc Fish Oceanogr, 72 (1) (2008) 30–36.

  • Nigmatullin C M, Resources and fishery perspectives of nektonic epipelagic squid of world Ocean, In: Reserve Food Biological Resources of Open Ocean and Seas of USSR, edited by Alexeev A P, (VNIERH Press, Moscow), 1990, pp. 11–13 (In Russian).

  • Nigmatullin C M & Arkhipkin A I, A review of the biology of the diamondback squid, Thysanoteuthis rhombus (Oegopsida: Thysanoteuthidae), In: Contributed Papers to International Symposium on Large Pelagic Squids, July 18-19, 1996, for JAMARC’s 25th Anniversary of Its Foundation, 1998, pp. 155–181.

  • Barnard K H, Rare squid at the Cape (Thysanoteuthis rhombusTrosch.), J Conch, 22 (1947) p. 286.

  • Silas E G, Cephalopoda of the west coast of India collected during the cruises of the research vessel VARUNA, with catalogue of the species known from the Indian Ocean,Proc Symp Mollusca, Mar Biol Assoc India, Pt. I: 1968, pp. 277–359.

  • Silas E G, Rao K S, Sarvesan R, Nair K P, Vidyasagar K, et al., Some aspects of the biology of squids, In: Cephalopod bionomics, fisheries and resources of the Exclusive Economic Zone of India, edited by Silas E G, Bull Cent Mar Fis Res Inst, 37 (1985) 38–48.

  • Sasikumar G, SajiKumar K K, Sahib P K, Nataraja G D, Venkatesan V, et al., Emerging commercial importance for Diamondback squid in Kerala and Karnataka, Mar Fish Infor Serv T & E Ser, 239 (2019) p. 32.

  • Alejo-Plata M C & Urbano-Alonso B, The finding of diamond squid Thysanoteuthis rhombusin the Gulf of Tehuantepec, Northeastern Tropical Pacific, Hydrobiologica, 28 (1) (2018) 147–150.


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  • A unique occurrence of large-sized diamondback squid Thysanoteuthis rhombus (Troschel, 1857) in the Gulf of Mannar

Abstract Views: 147  |  PDF Views: 97

Authors

M Rajkumar
ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India
M Midun
ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India
S Thirumalaiselvan
ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India
R Rajkumar
ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India
R Saravanan
ICAR-Central Marine Fisheries Research Institute, Kochi – 682 018, India., India

Abstract


The presence of the large-sized diamondback squid Thysanoteuthis rhombus(Troschel, 1857) in the Gulf of Mannar biosphere was confirmed after a two-decade absence, based on a single specimen observed during landings at the Pamban lighthouse Fish Landing Centre. A squid measuring 633 mm in mantle length and weighing 15.1kg was caught in the hook and line at a depth of 20 m. The discovery of this species in the Gulf of Mannar unequivocally confirms that the population is still present in the ecosystem.

Keywords


Diamondback Squid, Gulf of Mannar, Hook and Line, Mantle Length.

References