Abstract
Trematomus newnesi is a common inshore species with a circum-Antarctic distribution. It provides the only known example of phenotypic plasticity in Antarctic notothenioid fish, existing as populations of typical, large mouth and intermediate morphs that can be difficult to identify. Using specimens from both Potter Cove, King George/25 de Mayo Island, and from McMurdo Sound, we found that the morphometric measurements gape width/head length (HL), upper jaw length/HL and, to a lesser extent, orbit diameter/HL reliably separated the morphs. For use in a key, we converted the ratios into the qualitative characters head shape, head width and upper jaw length relative to middle of the eye. To increase the reliability of the key, we also assessed intra-morph variability in these characters. The key is supplemented with colour photographs illustrating the distinctive features for separation of the morphs. We discovered that, in the case of the specimens from Potter Cove, each morph had a distinct pattern of colouration: typical—trunk blotched, with yellow or orange-brown predominating especially on pectoral and caudal fins; large mouth—trunk blotched, with green predominating especially in pectoral and opercular regions; and intermediate—trunk less blotched, with homogeneous dark brown-grey on trunk, pectoral and caudal fins. We also discuss the ecological implications of colour in the morphs.
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References
Armbruster JW, Page LM (1996) Convergence of a cryptic saddle pattern in benthic freshwater fishes. Environ Biol Fish 45:249–257
Barrera-Oro E (2002) The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula. Antarct Sci 14:293–309
Barrera-Oro ER, Piacentino GLM (2007) Feeding habits of juvenile Trematomus newnesi (Pisces, Nototheniidae) at Potter Cove, South Shetland Islands, Antarctica. Polar Biol 30:789–796
Casaux RJ, Mazzotta AS, Barrera-Oro ER (1990) Seasonal aspects of the biology and diet of nearshore nototheniid fish at Potter Cove, South Shetland Islands, Antarctica. Polar Biol 11:63–72
Clarke JM, Schluter D (2011) Colour plasticity and background matching in a threespine stickleback species pair. Biol J Linn Soc 102:909–914
D’Avino R, Caruso C, Tamburrini M, Romano M, Rutigliano B, Polverino de Laureto P, Camardella L, Carratore V, Prisco G (1994) Molecular characterisation of the functionally distinct hemoglobins of the Antarctic fish Trematomus newnesi. J Biol Chem 269:9675–9681
Dayton PK (1990) Polar benthos. In: Smith WO Jr (ed) Polar oceanography, part B: chemistry, biology, and geology. Academic Press, San Diego, pp 631–685
DeWitt HH, Heemstra PC, Gon O (1990) Nototheniidae. In: Gon O, Heemstra PC (eds) Fishes of the Southern Ocean. JLB Smith Institute of Ichthyology, Grahamstown, pp 279–331
Eastman JT, Barrera-Oro ER (2010) Buoyancy studies of three morphs of the Antarctic fish Trematomus newnesi (Nototheniidae) from the South Shetland Islands. Polar Biol 33:823–831
Eastman JT, DeVries AL (1997) Biology and phenotypic plasticity of the Antarctic nototheniid fish Trematomus newnesi in McMurdo Sound. Antarct Sci 9:27–35
Eastman JT, Sidell BD (2002) Measurements of buoyancy for some Antarctic notothenioid fishes from the South Shetland Islands. Polar Biol 25:753–760
Hazel JR, Sidell BD (2004) The substrate specificity of hormone-sensitive lipase from adipose tissue of the Antarctic fish Trematomus newnesi. J Exp Biol 207:897–903
Heywood RB, Whitaker TM (1984) The Antarctic marine flora. In: Laws RM (ed) Antarctic ecology, vol 2. Academic Press, London, pp 373–419
Hubbs CL, Lagler KF (2004) Fishes of the great lakes region (revised ed). University of Michigan Press, Ann Arbor
Kock K-H (1985) Krill consumption by Antarctic notothenioid fishes. In: Siegfried WR, Condy PR, Laws RM (eds) Antarctic nutrient cycles and food webs. Springer, Berlin, pp 437–444
La Mesa M, Vacchi M, Zunini Sertorio T (2000) Feeding plasticity of Trematomus newnesi (Pisces, Nototheniidae) in Terra Nova Bay, Ross Sea, in relation to environmental conditions. Polar Biol 23:38–45
Marshall NB (1966) The life of fishes. Universe Books, New York
Norman JR, Greenwood PH (1975) A history of fishes, 3rd edn. Halsted Press, New York
North AW (1996) Locomotory activity and behaviour of the Antarctic teleost Notothenia coriiceps. Mar Biol 126:125–132
Piacentino GLM, Barrera-Oro E (2009) Phenotypic plasticity in the Antarctic fish Trematomus newnesi (Nototheniidae) from the South Shetland Islands. Polar Biol 32:1407–1413
Pisano E, Vacchi M, Bono R, Ossola C, Albertelli G (2010) Fish under the ice (DVD). Progetto del Museo Nazionale dell’Antartide, Genoa
Quartino ML, Boraso de Zaixso AL (2008) Summer macroalgal biomass in Potter Cove, South Shetland Islands, Antarctica: its production and flux to the ecosystem. Polar Biol 31:281–294. doi:10.1007/s00300-007-0356-1
Quartino ML, Klöser H, Schloss IR, Wiencke C (2001) Biomass and associations of benthic marine macroalgae from the inner Potter Cove (King George Island Antarctica) related to depth and substrate. Polar Biol 24:349–355. doi:10.1007/s003000000218
Quartino ML, Boraso de Zaixso AL, Zaixso H (2005) Biological and environmental characterization of marine macroalgae assemblages in Potter Cove, South Shetland Islands, Antarctica. Bot Mar 48:187–197. doi:10.1515/BOT.2005.029
Radtke RL, Targett TE, Kellermann A, Bell JL, Hill KT (1989) Antarctic fish growth: profile of Trematomus newnesi. Mar Ecol Prog Ser 57:103–117
Tiedtke JE, Kock K-H (1989) Structure and composition of the demersal fish fauna around Elephant Island. Arch Fischereiwiss 39:143–169
Vacchi M, La Mesa M (1995) The diet of the Antarctic fish Trematomus newnesi Boulenger, 1902 (Nototheniidae) from Terra Nova Bay, Ross Sea. Antarct Sci 7:37–38
Van Houdt JKJ, Hellemans B, Van de Putte A, Koubbi P, Volckaert FAM (2006) Isolation and multiplex analysis of six polymorphic microsatellites in the Antarctic notothenioid fish, Trematomus newnesi. Mol Ecol Notes 6:157–159
Whiteley AR, Gende SM, Gharrett AJ, Tallmon DA (2009) Background matching and color-change plasticity in colonizing freshwater sculpin populations following rapid deglaciation. Evolution 63:1519–1529
Acknowledgments
We are grateful to Carlos Bellisio and Luis Vila for their collaboration in field activities and Sebastian Masi for their guidance in photographic procedures. The specimens from McMurdo Sound were collected and kindly given to us by Dr. Art DeVries. JTE was supported by US National Science Foundation grant ANT 04-36190. We thank the reviewers, Drs. Catherine Ozouf-Costaz and Guillaume Lecointre, for their comments on this paper.
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Barrera-Oro, E., Eastman, J.T. & Moreira, E. Phenotypic plasticity in the Antarctic nototheniid fish Trematomus newnesi: a guide to the identification of typical, large mouth and intermediate morphs. Polar Biol 35, 1047–1056 (2012). https://doi.org/10.1007/s00300-011-1152-5
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DOI: https://doi.org/10.1007/s00300-011-1152-5