Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-29T08:50:42.292Z Has data issue: false hasContentIssue false
  • English
  • Français

Meristic variation in males of the hydrothermal vent octopus, Muusoctopus hydrothermalis (Cephalopoda: Octopodidae)

Published online by Cambridge University Press:  22 July 2011

Janet R. Voight
Janet R. Voight*
Affiliation:
Department of Zoology, The Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, IL 60605USA
*
Correspondence should be addressed to: J.R. Voight, Department of Zoology, The Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, IL 60605USA email: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

Intraspecific variation in characters such as arm sucker and gill lamellae counts in octopodids is yet to be thoroughly investigated, potentially hampering our ability to recognize species. In this study, data from 13 specimens of Muusoctopus hydrothermalis collected at four hydrothermal vents on the East Pacific Rise between 8°38′N and 12°48′N are considered. Although the northern and southern octopuses differ minimally in size, mean sucker count by arm in the northern group is 11.7 to 22.8% higher than it is in the southern group; in addition these octopuses typically have an additional gill lamella and bulkier funnel organs. The arms of each individual carry a different number of suckers. The difference is significant on nonadjacent arms, a pattern that merits examination in a broader taxonomic context. Why these differences exist among conspecifics remains unknown, the incidence of parasitic copepods is not different between the groups and the between-group variation in arm suckers seen here compares well with a previous report of variation among 18 specimens from the type locality. Increases in meristic characters (counts) in fish are attributed to lower temperatures during embryonic development following Jordan's rule. Northern and southern vents offer the octopuses a wide temperature range, but vent fluid chemistry differs. Northern vent fluids may be more toxic; if so, developing octopus embryos may survive only minimal vent fluid exposure and therefore develop at low temperatures. At the less toxic southern vents, eggs may survive greater exposure to vent fluids and thus develop at higher temperatures.

Keywords

arm sucker countsgill lamellaepopulation variationfunnel organhectocotylized arm suckersJordan's rule
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 2 , March 2012 , pp. 361 - 366
Copyright
Copyright © Marine Biological Association of the United Kingdom 2011

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Allcock, A.L. (2005) On the confusion surrounding Pareledone charcoti (Joubin, 1905) (Cephalopoda: Octopodidae): endemic radiation in the Southern Ocean. Zoological Journal of the Linnean Society 143, 75–108.CrossRefGoogle Scholar
Allcock, A.L., Collins, M.A. and Vecchione, M. (2003) A redescription of Graneledone verrucosa (Verrill, 1881) (Octopoda: Octopodidae). Journal of Molluscan Studies 69, 135–143.CrossRefGoogle Scholar
Allcock, A.L., Strugnell, J.M., Ruggiero, J. and Collins, M.A. (2006) Redescription of the deep-sea octopod Benthoctopus normani (Massy 1907) and a description of a new species from the Northeast Atlantic. Marine Biology Research 2, 372–387.CrossRefGoogle Scholar
Allcock, A.L., Strugnell, J.M., Prodöhl, P., Piatkowski, U. and Vecchione, M. (2007) A new species of Pareledone (Cephalopoda: Octopodidae) from Antarctic Peninsula waters. Polar Biology 30, 883–893.CrossRefGoogle Scholar
Allcock, A.L., Strugnell, J.M. and Johnson, M.P. (2008) How useful are the recommended counts and indices in the systematics of the Octopodidae (Mollusca: Cephalopoda)? Biological Journal of the Linnean Society 95, 205–218.CrossRefGoogle Scholar
Carbotte, S.M., Arko, R., Chayes, D.N., Haxby, W., Lehnert, K., O'Hara, S., Ryan, W.B.F., Weissel, R.A., Shipley, T., Gahagan, L., Johnson, K. and Shank, T. (2004) New integrated data management system for Ridge2000 and MARGINS research. Eos Transactions of the American Geophysical Union 85, 553, doi:10.1029/2004EO510002.CrossRefGoogle Scholar
Fusaro, A.J. (2008) Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galápagos Rift. PhD thesis. Massachusetts Institute of Technology, Cambridge, USA.CrossRefGoogle Scholar
Gleadall, I.G., Guerrero-Kommritz, J., Hochberg, F.G. Jr and Laptikhovsky, V.L. (2010) The inkless octopuses (Cephalopoda: Octopodidae) of the southwest Atlantic. Zoological Science 27, 528–553.CrossRefGoogle ScholarPubMed
González, A.F., Guerra, A., Pascual, S. and Briand, P. (1998) Vulcanoctopus hydrothermalis gen. et sp. nov. (Mollusca, Cephalopoda): an octopod from a deep-sea hydrothermal vent site. Cahiers Biologie Marine 39, 169–184.Google Scholar
González, A.F., Guerra, A., Rocha, F. and Briand, P. (2002) Morphological variation in males of Vulcanoctopus hydrothermalis (Mollusca, Cephalopoda). Bulletin of Marine Science 71, 289–298.Google Scholar
González, A.F., Guerra, A. and Segonzac, M. (2006). Vulcanoctopus hydrothermalis. Densia 18, 170.Google Scholar
Hubbs, C.L. (1922) Variations in the number of vertebrae and other meristic characters of fishes correlated with the temperature of water during development. American Naturalist 56, 360–372.CrossRefGoogle Scholar
Hurtado, L.A., Lutz, R.A. and Vrijenhoek, R.C. (2004) Distinct patterns of genetic differentiation among annelids of eastern Pacific hydrothermal vents. Molecular Ecology 13, 2603–2615.CrossRefGoogle ScholarPubMed
Jollivet, D. (1996) Specific and genetic diversity at deep-sea hydrothermal vents: an overview. Biodiversity and Conservation 5, 1619–1653.CrossRefGoogle Scholar
Jordan, D.S. (1892) Relations of temperature to vertebrae among fishes. Proceedings of the United States National Museum 1891, 107–120.Google Scholar
Le Bris, N., Sarradin, P-M. and Caprais, J-C. (2003) Contrasted sulphide chemistries in the environment of 13°N EPR vent fauna. Deep-Sea Research I 50, 737–747.CrossRefGoogle Scholar
Le Bris, N., Govenar, B., LeGall, C. and Fisher, C.R. (2006) Variability of physico-chemical conditions in 9°50′N EPR diffuse flow vent habitats. Marine Chemistry 98, 167–182.CrossRefGoogle Scholar
Lindsey, C.C. and Harrington, R.W. Jr (1972) Extreme vertebral variation induced by temperature in a homozygous clone of the self-fertilizing cyprinodontid fish Rivulus marmoratus. Canadian Journal of Zoology 50, 733–744.CrossRefGoogle Scholar
Lopez- González, P.J., Bresciani, J., Huys, R., González, A.F., Guerra, A. and Pascual, S. (2000) Description of Genesis vulcanoctopusi gen. et sp. nov. (Copepoda: Tisbidae) parasitic on a hydrothermal vent octopod and a reinterpretation of the life cycle of cholidyinid harpacticoids. Cahiers de Biologie Marine 41, 241–253.Google Scholar
Matabos, M., Thiébaut, E., Le Guen, D., Sadosky, F., Jollivet, D. and Bonhomme, F. (2008) Geographic clines and stepping-stone patterns detected along the East Pacific Rise in the vetigastropod Lepetodrilus elevatus reflect species crypticism. Marine Biology 153, 545–563.CrossRefGoogle Scholar
McDowall, R.M. (2008) Jordan's and other ecogeographical rules, and the vertebral number in fishes. Journal of Biogeography 35, 501–508.CrossRefGoogle Scholar
Muus, B. (2002) The Bathypolypus–Benthoctopus problem of the North Atlantic (Octopodidae, Cephalopoda). Malacologia 44, 175–222.Google Scholar
Norman, M.D. (1992) Ameloctopus litoralis, gen. et sp. nov. (Cephalopoda: Octopodidae), a new shallow-water octopus from tropical Australian waters. Invertebrate Taxonomy 6, 567–582.CrossRefGoogle Scholar
Norman, M.D., Hochberg, F.G. and Boucher-Rodoni, R. (2005) A revision of the deep-water octopus genus Scaeurgus (Cephalopoda: Octopodidae) with description of three new species from the Southwest Pacific Ocean. Journal of Molluscan Studies 71, 319–337.CrossRefGoogle Scholar
O'Reilly, K.M. and Horn, M.H. (2004) Phenotypic variation among populations of Atherinops affinis (Atherinopsidae) with insights from a geometric morphometric analysis. Journal of Fish Biology 64, 1117–1135.CrossRefGoogle Scholar
Roper, C.F.E. and Voss, G.L. (1983) Guidelines for taxonomic descriptions of cephalopod species. Memoirs of the National Museum of Victoria 44, 49–63.CrossRefGoogle Scholar
Strugnell, J., Voight, J.R., Collins, P.C. and Allcock, A.L. (2009) Molecular phylogenetic analysis of a known and a new hydrothermal vent octopod: their relationships with the genus Benthoctopus (Cephalopoda: Octopodidae). Zootaxa 2096, 442–459.CrossRefGoogle Scholar
Tåning, Å.V. (1952) Experimental study of meristic characters in fishes. Biological Review 271, 169–193.CrossRefGoogle Scholar
Toll, R.B. (1988) The use of arm sucker number in octopodid systematics (Cephalopoda: Octopoda). American Malacological Bulletin 6, 207–211.Google Scholar
Voight, J.R. (1991) Morphological variation in octopod specimens: reassessing the assumption of preservation-induced deformation. Malacologia 33, 241–253.Google Scholar
Voight, J.R. (2001) Morphological deformation in preserved specimens of the deep-sea octopus Graneledone. Journal of Molluscan Studies 67, 95–102.CrossRefGoogle Scholar
Voight, J.R. (2005) Hydrothermal vent octopus, Vulcanoctopus hydrothermalis, feeds on bathypelagic amphipods of Halice. Journal of the Marine Biological Association of the United Kingdom 85, 985–988.CrossRefGoogle Scholar
Voight, J.R., Zierenberg, R.A., McClain, J., Batson, P., Beers, K., Daly, M., Dushman, B., Gollner, S., Govenar, B., Haney, T.A., Hourdez, S., Liow, L.H., Parker, C., Von Damm, K., Zekely, J. and Zelnio, K.A. (2004) FIELD Cruise to the Northern EPR: discoveries made during biological investigations from 8°37′N to 12°48′N. RIDGE 2000 Events 2, 22–24.Google Scholar
Voss, G.L. and Pearcy, W.G. (1990) Deep-water octopods (Mollusca; Cephalopoda) of the Northeastern Pacific. Proceedings of the California Academy of Sciences 47, 47–94.Google Scholar
Won, Y., Young, C.R., Lutz, R.A. and Vrijenhoek, R.C. (2003) Dispersal barriers and isolation among deep-sea mussel populations (Mytilidae: Bathymodiolus) from eastern Pacific hydrothermal vents. Molecular Ecology 12, 169–184.CrossRefGoogle ScholarPubMed
Young, R.E. and Mangold, K.M. (2000) Tree of Life cephalopod Pseudomorph Function. http://tolweb.org/accessory/Cephalopod_Pseudomorph_Function?acc_id=1964Google Scholar