Abstract
The seasonal moulting pattern of Calanus finmarchicus, related to body size, oil content and depth distribution, was investigated on the Norwegian midshelf from February to October 1997. Both gonad and gnathobase development were well correlated with time, and proved to be good indices for tracing the moulting cycle. The growth and development of gonads preceded the formation of new teeth. Both gonad development and tooth formation patterns in overwintering stage V copepodites (CV) indicated that the most intensive moulting occurred in spring. In the upper 200 m layer, the proportion of copepods in premoult phases ranged from 10% at the beginning of February, 60–95% from the end of February through April, to 4–7% in mid-May. No significant latitudinally determined variations in the moulting pattern were observed. The upward migration of deep-dwelling overwintering CVs was not synchronous and was determined by the readiness to moult. In April, no CVs were found at depths >300 m, that may indicate the termination of the overwintering moulting from Go. By the end of May, the large-sized, lipid-rich CVs of G1 started descending to depth. The second period of moulting (i.e. most likely the formation of G2) was only recorded to have taken place in the surface (0–200 m) component of the CV stock from July onwards. This group was estimated to make up 10–20% of CVs inhabiting the upper 200 m layer and to have originated from the smallest sized fraction of CVs. There was a consistent trend towards size-differential moulting from CVs, in both spring and summer. The large-sized CVs moulted into adults earlier in spring compared with the smaller ones. By mid-June, the large and lipid-rich CVs of G1 disappeared from the uppermost layers, sinking to depths. In summer (July onwards), the moulting of small CVs is probably the main contributor to G2 copepodites that completed the cycle through to CIV/CV by the end of October.
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References
Aksnes DL, Magnesen T (1983) Distribution, development, and production of Calanus finmarchicus in Lindåspollene, western Norway, 1979. Sarsia 68:195–208
Arashkevich EG, Drits AV, Timonin AG (1996) Diapause in the life cycle of Calanoides carinatus (Krøyer) (Copepoda, Calanoida). Hydrobiologia 320:197–208
Beklemishev KV (1959) On the anatomy of masticator organs of Copepoda, report II. The masticator edge in mandibles of certain species of Calanidae and Eucalanidae (in Russian). Tr Inst Okeanol Akad Nauk SSSR 30:148–155
Brodsky KA (1959) On phylogenetic relationships of some species of Calanus (Copepoda) of the northern and southern hemispheres (in Russian). Zool Zh 38:1537–1553
Conover RJ (1988) Comparative life histories in the genera Calanus and Neocalanus in high latitudes of the northern hemisphere. Hydrobiologia 167/168:127–142
Escribano R, McLaren IA (1992) Influence of food and temperature on lengths and weights of two marine copepods. J Exp Mar Biol Ecol 159:77–88
Falkenhaug T, Tande KS, Semenova T (1997) Diel, seasonal and ontogenetic variations in the vertical distributions of four marine copepods. Mar Ecol Prog Ser 149:105–119
Frost BW (1974) Calanus marshallae, a new species of calanoid copepod closely allied to the sibling species C. finmarchicus and C. glacialis. Mar Biol 26:71–99
Heath MR (1999) The ascent migration of Calanus finmarchicus from overwintering depths in the Faroe–Shetland Channel. Fish Oceanogr 8[Suppl 1]:84–99
Heath MR, Jónasdóttir SH (1999) Distribution and abundance of overwintering Calanus finmarchicus in the Faroe–Shetland Channel. Fish Oceanogr 8[Suppl 1]:40–60
Hirche H-J (1991) Distribution of dominant calanoid copepod species in the Greenland Sea during late fall. Polar Biol 11:351–362
Hirche H-J (1996) Diapause in the marine copepod, Calanus finmarchicus—a review. Ophelia 44:129–143
Huntley ME, Lopez MDG (1992) Temperature-dependant production of marine copepods: a global synthesis. Am Nat 140:201–242
Ingvarsdóttir A, Houlihan DF, Heath MR, Hay SJ (1999) Seasonal changes in respiration rates of copepodite stage V Calanus finmarchicus (Gunnerus). Fish Oceanogr 8[Suppl 1]:73–83
Jaschnov WA (1955) Morphology, distribution and systematic of Calanus finmarchicus s.l. (in Russian). Zool Zh 34:1210–1223
Johannessen OM (1986) Brief overview of the physical oceanography. In: Hurdle BG (ed) The nordic seas. Springer, New York, pp 103–127
Jónasdóttir SH (1999) Lipid content of Calanus finmarchicus during overwintering in the Faroe–Shetland Channel. Fish Oceanogr 8[Suppl 1]:61–72
Lee RF, Hirota J, Barnett AM (1971) Distribution and importance of WE in marine copepods and other zooplankton. Deep-Sea Res 18:1147–1165
Mackas DL, Sefton H, Miller CB, Reich A (1993) Vertical habitat partitioning by large calanoid copeods in the subarctic Pacific during spring. Prog Oceanogr 32:259–294
Marshall SM, Orr AP (1955) The biology of a marine copepod Calanus finmarchicus Gunnerus. Oliver and Boyd, Edinburgh
Mauchline J (1998) The biology of calaniod copepods. Adv Mar Biol 33:1–710
Miller CB (1993) Development of large copepods during spring in the Gulf of Alaska. Prog Oceanogr 32:295–317
Miller CB, Nielsen RD (1988) Development and growth of large, calanoid copepods in the Oceanic Subarctic Pacific, May 1984. Prog Oceanogr 20:275–292
Miller CB, Fulton J, Frost BW (1991a) Size variation of Neocalanus plumchrus and Neocalanus flemingeri in a 20-yr sample series from the Gulf of Alaska. Can J Aquat Sci 49:389–399
Miller CB, Cowles TJ, Wiebe PH, Copley NJ, Grigg H (1991b) Phenology in Calanus finmarchicus; hypotheses about control mechanisms. Mar Ecol Prog Ser 72:79–91
Miller CB, Morgan CA, Prahl FG, Sparrow MA (1998) Storage lipids of the copepod Calanus finmarchicus from Georges Bank and the Gulf of Maine. Limnol Oceanogr 43:488–497
Miller CB, Crain JA, Morgan CA (2000) Oil storage variability in Calanus finmarchicus. ICES J Mar Sci 57:1786–1799
Østvedt OJ (1955) Zooplankton investigations from weathership ‘M’ in the Norwegian Sea, 1948–49. Hvalrad Skr 40:1–93
Pasternak A, Arashkevich E, Tande KS, Falkenhaug T (2001) Seasonal changes in feeding, gonad development and lipid stores in Calanus finmarchicus and C. hyperboreus from Malangen, northern Norway. Mar Biol 138:1141–1152
Pedersen OP, Tande KS, Timonin A, Semenova T (2000) A possible connection between hydrography and the distribution of Calanus finmarchicus on the Norwegian mid-shelf in 1997. ICES J Mar Sci 57:1645–1655
Pedersen OP, Tande KS, Slagstad D (2001) A model study of demography and spatial distribution of Calanus finmarchicus at the Norwegian coast. Deep-Sea Res 48:567–587
Poulain P-M, Warn-Varnas A, Niiler PP (1996) Near surface circulation of the Nordic seas as measured by lagrangian drifters. J Geophys Res 101:18237–18258
Saetre R (1999) Features of the central Norwegian shelf circulation. Cont Shelf Res 19:1809–1831
Skreslet S (1995) Spawning of Calanus finmarchicus related to meso-scale environmental structures in the Norwegian shelf break front. Int Counc Explor Sea Comm Meet Q:8
Slagstad D, Tande KS (1996) The importance of seasonal vertical migration in across shelf transport of Calanus finmarchicus. Ophelia 44:189–205
Tande KS (1982) Ecological investigations of the zooplankton community of Balsfjorden, northern Norway: generation cycles, and variation in body weight and body content of carbon and nitrogen related to overwintering and reproduction in the copepod Calanus finmarchicus (Gunnerus). J Exp Mar Biol Ecol 62:129–142
Tande KS (1991) Calanus in north Norwegian fjords and in the Barents Sea. Polar Res 10:389–407
Tande KS, Hopkins CCE (1981) Ecological investigations of the zooplankton community of Balsfjorden, northern Norway: the genital system in Calanus finmarchicus and the role of gonad development in overwintering strategy. Mar Biol 63:159–164
Tsuda A, Miller CB (1998) Mate-finding behaviour in Calanus marshallae Frost. Philos Trans R Soc Lond B Biol Sci 353:713–720
Tsuda A, Saito H, Kasai H (1999) Life histories of Neocalanus flemingeri and Neocalanus plumchrus (Calanoida: Copepoda) in the western subarctic Pacific. Mar Biol 135:533–544
Visser AW, Jónasdóttir SH (1999) Lipids, buoyancy and the seasonal vertical migration of Calanus finmarchicus. Fish Oceanogr 8[Suppl 1]:100–106
Acknowledgements
This is a contribution from TASC (Trans-Atlantic Study of Calanus finmarchicus), funded by the European Commission (contract no. MAS3-CT95-0039), the Research Council of Norway (IS; grant no. OE00-128 to E. Arachkevich), and partly by the Russian Foundation for Basic Research (grant number 04-04-48128).
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Communicated by O. Kinne, Oldendorf/Luhe
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Arashkevich, E.G., Tande, K., Pasternak, A.F. et al. Seasonal moulting patterns and the generation cycle of Calanus finmarchicus in the NE Norwegian Sea, as inferred from gnathobase structures, and the size of gonads and oil sacs. Marine Biology 146, 119–132 (2004). https://doi.org/10.1007/s00227-004-1416-5
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DOI: https://doi.org/10.1007/s00227-004-1416-5