New record of Hexanchus griseus in the northwestern Mediterranean Sea with insights into its biology and feeding ecology predator or scavenger?
Published:
Mar 6, 2023
Keywords:
bluntnose sixgill shark reproductive biology predation scavenging behaviour stomach content striped dolphin
Abstract
On 15 March 2021, a male Hexanchus griseus was incidentally captured by a commercial bottom trawler at 550-730 m depth in the Gulf of Valencia (Spain). The specimen measured 251.8 cm in total length, weighed 86.2 kg and its reproductive system was fully developed, characterizing it as the smallest mature male bluntnose sixgill shark recorded in the Mediterranean Sea. The specimen hosted the ectoparasitic copepod Demoleus heptapus. Remains of a Stenella coeruleoalba calf were identified in its stomach content by applying molecular methods. The feeding behaviour of H. griseus as either actively preying on live cetaceans or as scavenging on carcasses is reviewed and discussed to better understand the species’ role in marine food webs.
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RUIZ-GARCÍA, D., GARCÍA-SALINAS, P., RAGA, J. A., MOURA, A. E., DROMBY , M., & BARRÍA, C. (2023). New record of Hexanchus griseus in the northwestern Mediterranean Sea with insights into its biology and feeding ecology: predator or scavenger?. Mediterranean Marine Science, 24(1), 109–116. https://doi.org/10.12681/mms.29940
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References
Agusti, C., Aznar, F.J., Olson, P.D., Littlewood, D.T.J., Kostadinova,A. et al., 2005. Morphological and molecularcharacterization of tetraphyllidean merocercoids(Platyhelminthes: Cestoda) of striped dolphins (Stenellacoeruleoalba) from the Western Mediterranean. Parasitology,130 (4), 461-474.
Aguzzi, J., Fanelli, E., Ciuffardi, T., Schirone, A., De Leo,F.C. et al., 2018. Faunal activity rhythms influencing earlycommunity succession of an implanted whale carcassoffshore Sagami Bay, Japan. Scientific reports, 8 (1), 1-15.
Andrews, K.S., Williams, G.D., Farrer, D., Tolimieri, N.,Harvey, C.J. et al., 2009. Diel activity patterns of sixgillsharks, Hexanchus griseus: the ups and downs of an apexpredator. Animal Behaviour, 78 (2), 525-536.
Aznar, F.J., Agustí, C., Littlewood, D.T.J., Raga, J.A., Olson,P.D., 2007. Insight into the role of cetaceans in the life cycleof the tetraphyllideans (Platyhelminthes: Cestoda). InternationalJournal for Parasitology, 37 (2), 243-255.
Aznar, F.J., Míguez-Lozano, R., Ruiz, B., de Castro, A.B.,Raga, J.A. et al., 2017. Long-term changes (1990-2012) inthe diet of striped dolphins Stenella coeruleoalba from thewestern Mediterranean. Marine Ecology Progress Series,568, 231-247.
Barría, C., Coll, M., Navarro, J., 2015. Unravelling theecological role and trophic relationships of uncommon andthreatened elasmobranchs in the western MediterraneanSea. Marine Ecology Progress Series, 539, 225-240.
Barría, C., Colmenero, A.I., 2019. La pesca de tiburones yrayas en el noroeste del Mediterráneo, una situación compleja.Derecho Animal. Forum of Animal Law Studies, 10(4), 105-111.
Bourret, V., Macé, M., Bonhomme, M., Crouau-Roy, B.,2008. Microsatellites in cetaceans: An overview. The OpenMarine Biology Journal, 2 (1), 38-42.
Bozzano, A., Sardà, F., 2002. Fishery discard consumption rateand scavenging activity in the northwestern MediterraneanSea. ICES Journal of Marine Science, 59 (1), 15-28.
Caira, J.N., Jensen, K., Pickering, M., Ruhnke, T.R., Gallagher,K.A., 2020. Intrigue surrounding the life-cycles of speciesof Clistobothrium (Cestoda: Phyllobothriidea) parasitisinglarge pelagic sharks. International Journal for Parasitology, 50 (13), 1043-1055.
Calzada, N., Aguilar, A., Grau, E., Lockyer, C., 1997.Patterns of growth and physical maturity in the westernMediterranean striped dolphin, Stenella coeruleoalba(Cetacea: Odontoceti). Canadian journal of zoology, 75(4), 632-637.
Cañadas, A., Sagarminaga, R., García-Tiscar, S., 2002.Cetacean distribution related with depth and slope inthe Mediterranean waters off southern Spain. Deep SeaResearch Part I: Oceanographic Research Papers, 49 (11),2053-2073.
Capapé, C., Hemida, F., Guélorget, O., Barrull, J., Mate, I. et al.,2004. Reproductive biology of the Bluntnose sixgill sharkHexanchus griseus (Bonnaterre, 1788) (Chondrichthyes:Hexanchidae) from the Mediterranean Sea: a review. ActaAdriatica, 45 (1), 95-106.
Celona, A., De Maddalena, A., Romeo, T., 2005. Bluntnosesixgill shark, Hexanchus griseus (Bonnaterre, 1788), in theeastern north Sicilian waters. Bollettino del Museo civico diStoria naturale di Venezia, 56, 137-151.
Chartosia, N., Anastasiadis, D., Bazairi, H., Crocetta, F., Deidun,A. et al., 2018. New Mediterranean BiodiversityRecords (July 2018). Mediterranean Marine Science, 19(2), 398-415.
Clark, E., Kristof, E., 1990. Deep-sea elasmobranchs observedfrom submersibles off Bermuda, Grand Cayman, andFreeport, Bahamas. NOAA Technical Report, 90, 16 pp.
Coffey, D.M., Royer, M.A., Meyer, C.G., Holland, K.N., 2020.Diel patterns in swimming behavior of a vertically migratingdeep water shark, the bluntnose sixgill (Hexanchus griseus).PloS one, 15 (1), e0228253.
Comfort, C.M., Weng, K.C., 2015. Vertical habitat andbehaviour of the bluntnose sixgill shark in Hawaii. DeepSea Research Part II: Topical Studies in Oceanography;Biology of Deep-Water Chondrichthyans, 115, 116-126.
Compagno, L.J.V., 1984. FAO species catalogue. Vol. 4. Sharksof the world. An annotated and illustrated catalogue ofshark species known to date. Part 1. Hexanchiformes toLamniformes. p. 8-12. In: FAO Fish Synopsis. Kühlmann,D.H.H. (Ed). FAO, Rome, Italy.
Ebert, D.A., 1986. Biological aspects of the sixgill shark,Medit. Mar. Sci., 24/1 2023, 109-116 115Hexanchus griseus. Copeia, 131-135.
Ebert, D.A., 1991. Observations on the predatory behaviour ofthe sevengill shark Notorynchus cepedianus. South AfricanJournal of Marine Science, 11 (1), 455-465.
Ebert, D.A., 1994. Diet of the sixgill shark Hexanchus griseusoff southern Africa. South African Journal of MarineScience, 14 (1), 213-218.
Ebert, D.A., 2002a. Some observations on the reproductivebiology of the sixgill shark Hexanchus griseus (Bonnaterre,1788) from South African waters. African Journal ofMarine Science, 24, 359-363.
Ebert, D.A., 2002b. Ontogenetic changes in the diet of thesevengill shark (Notorynchus cepedianus). Marine andFreshwater Research, 53 (2), 517-523.
Finucci, B., Barnett, A., Bineesh, K.K., Cheok, J., Cotton, C.F.et al., 2020. Hexanchus griseus. The IUCN Red List ofThreatened Species 2020, e.T10030A495630.
García-Salinas, P., Gallego, V., Asturiano, J.F., 2021.Development of sperm cryopreservation protocols forsharks and rays: new tools for elasmobranch conservation.Frontiers in Marine Science, 8, 689089.
Gómez de Segura, A., Crespo, E.A., Pedraza, S.N., Hammond,P.S., Raga, J.A., 2006. Abundance of small cetaceansin waters of the central Spanish Mediterranean. MarineBiology, 150 (1), 149-160.
Gray, H., Nishida, S., Welch, A.J., Moura, A.E., Tanabe, S.et al., 2018. Cryptic lineage differentiation among Indo-Pacific bottlenose dolphins (Tursiops aduncus) in thenorthwest Indian Ocean. Molecular Phylogenetics andEvolution, 122, 1-14.
Guijarro, B., Quetglas, A., Moranta, J., Ordines, F., Valls, M. etal., 2012. Inter-and intra-annual trends and status indicatorsof nektobenthic elasmobranchs off the Balearic Islands(northwestern Mediterranean). Scientia Marina, 76 (1), 87-96.
Heithaus, M.R., 2001. Predator-prey and competitiveinteractions between sharks (order Selachii) and dolphins(suborder Odontoceti): a review. Journal of Zoology, 253(1), 53-68.
Henderson, A.C., Flannery, K., Dunne, J., 2003. Biologicalobservations on shark species taken in commercialfisheries to the west of Ireland. Biology and Environment:Proceedings of the Royal Irish Academy, 103 (1), 1-7.ICES, 2010. Report of the Workshop on Sexual MaturityStaging of Elasmobranches (WKMSEL). ICES CM 2010/ACOM, 48,32 pp.
Kabasakal, H., 2004. Preliminary observations on thereproductive biology and diet of the Bluntnose sixgill shark,Hexanchus griseus (Bonnaterre, 1788) (Chondrichthyes:Hexanchidae), in Turkish Seas. Acta Adriatica: InternationalJournal of Marine Sciences, 45 (2), 187-196.
Kabasakal, H., 2006. Distribution and biology of the bluntnosesixgill shark, Hexanchus griseus (Bonnaterre, 1788)(Chondrichthyes: Hexanchidae), from Turkish waters.Annales: Series Historia Naturalis, 16 (1), 29.
King, J.R., Surry, A.M., 2017. Seasonal and daily movementsof the bluntnose sixgill shark (Hexanchus griseus) in thestrait of Georgia from satellite tag data. EnvironmentalBiology of Fishes, 100 (12), 1543-1559.
McNeil, B., Lowry, D., Larson, S., Griffing, D., 2016. Feedingbehavior of subadult sixgill sharks (Hexanchus griseus) at abait station. PLoS One, 11 (5), e0156730.
Moore, M.J., Mitchell, G.H., Rowles, T.K., Early, G., 2020.Dead Cetacean? Beach, Bloat, Float, Sink. Frontiers inMarine Science, 7, 333.
Morey, G., Martínez, M., Massutí, E., Moranta, J., 2003. Theoccurrence of white sharks, Carcharodon carcharias,around the Balearic Islands (western Mediterranean Sea).Environmental Biology of Fishes, 68 (4), 425-432.
Mulas, A., Bellodi, A., Carbonara, P., Cau, A., Marongiu, M.F.et al., 2021. Bio-ecological features update on eleven rarecartilaginous fish in the Central-Western Mediterranean Seaas a contribution for their conservation. Life, 11 (9), 871.
Nakamura, I., Meyer, C.G., Sato, K., 2015. Unexpected positivebuoyancy in deep sea sharks, Hexanchus griseus, and aEchinorhinus cookei. PloS one, 10 (6), e0127667.
Nielsen, J., Hedeholm, R.B., Simon, M., Steffensen, J.F., 2014.Distribution and feeding ecology of the Greenland shark(Somniosus microcephalus) in Greenland waters. PolarBiology, 37 (1), 37-46.
Nuez, I., Gazo, M., Cardona, L., 2021. A closer look at thebycatch of medium-sized and large sharks in the northernCatalan coast (north-western Mediterranean Sea): Evidenceof an ongoing decline? Aquatic Conservation: Marine andFreshwater Ecosystems, 31 (19), 2369-2380.
Reum, J.C.P., Williams, G.D., Harvey, C.J., Andrews, K.S.,Levin, P.S., 2020. Trophic ecology of a large-bodied marinepredator, bluntnose sixgill shark Hexanchus griseus,inferred using stable isotope analysis. EnvironmentalBiology of Fishes, 103 (2), 147-162.
Soldo, A., Bariche, M., Buscher, E., Cook, S.F., Compagno,L.J.V. 2016. Hexanchus griseus. The IUCN Red List ofThreatened Species 2016, e.T10030A16527980.
Steudel, K., Beattie, J., 1993. Scaling of cursoriality inmammals. Journal of Morphology, 217 (1), 55-63.
Van Den Hoff, J., Morrice, M. G., 2008. Sleeper shark(Somniosus antarcticus) and other bite wounds observed onsouthern elephant seals (Mirounga leonina) at MacquarieIsland. Marine Mammal Science, 24 (1), 239-247.
Vella, N., Vella, A., 2010. A preliminary study of thebluntnose sixgill shark, Hexanchus griseus, in the centralMediterranean region, around the Maltese Islands. RapportCommission International Mer Mediterranee, 39, 695.
Walker, W.A, 2001. Geographical variation of the parasite,Phyllobothrium delphini (Cestoda), in ball’s porpoise,Phocoenoides dalli, in the northern north Pacific, BeringSea, and Sea of Okhotsk. Marine mammal science, 17 (2),264-275.
