Abstract
The feeding ofSagitta nagae, the most predominant chaetognath species in Suruga Bay, was studied. Specimens were collected with ORI-100 net (1.0 mm in mesh aperture) and MTD net (0.35 mm in mesh aperture) and were fixed with neutralized formalin. The main food organisms ofSagitta nagae were the copepods,Candacia bipinnata, Calanus pacificus andPareuchaeta russelli. The food-containing ratio (P/T, %) was higher at night and lower in the daytime. Here, P is the number ofSagitta containing food organisms in the gut and T is the total number ofSagitta examined. P/T was almost constant vertically in the upper 100 m layer. P/T was generally influenced neither by food density nor by the copepod numbers perSagitta in this study.Sagitta nagae took food throughout life. Food ingested bySagitta per day was calculated as 37.6% ofSagitta in dry weight.
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Aizawa, Y. and R.Marumo (1967): Vertical distribution of zooplankton and micronekton biomass in Sagami Bay, Central Japan. Inform. Bull. Plank. Jap. Commem. Num. Dr. Y.Matsue, 1–7.
Alvariño, A. (1962): Two new Pacific chaetognaths: their distribution and relationship to allied species. Bull. Scripps Inst. Oceanog. Tech. Ser.,8(1), 1–50.
Alvariño, A. (1965): Chaetognatha. Oceanography and Marine Biology: Annual Review,3, 115–194. Dr.H. Barnes, Ed. George Allen and Unwin Ltd., Great Britain.
Alvariño, A. (1967): The Chaetognatha of the NAGA Expedition (1959–1961) in the South China Sea and the Gulf of Thailand. Part I. Systematics NAGA Report,4(2), pp. 197.
Bigelow, H. B. (1926): Plankton of the offshore waters of the Gulf of Maine. Bull. U.S. Bur. Fish.,40(2), 1–509.
Broad, A.C. (1957): The relationship between diet and larval delelopment of Palaemonetes. Biol. Bull., Woods Hole,112, 162–170.
Burfield, S.T. (1927): Report on the Chaetognatha. Trans. Zool. Soc. Lond.,22(3), 255–356.
Cannon, H. G. (1940): On the anatomy ofGigantscypris mülleri. Discovery Rep.,19, 185–224.
David, P.M. (1955): The distribution ofSagitta gazellae Ritter-Záhony. Discovery Rep.,27, 235–278.
Grey, B. B. (1930): Chaetognatha from the Society Islands. Proc. Roy. Soc. Queensland,42, 62–67.
Harvey, H. W., L. H. N. Cooper, M. V. Lebour andF. S. Russell (1935): Plankton production and its control. J. Mar. Biol. Ass. U.K.,20, 407–441.
Hyman, L. H. (1959): Invertebrates, 5, pp. 783, Mcgraw-Hill Book Co., Inc., New York.
Kawarada, Y., M. Kitou, K. Furuhashi, A. Sano, K. Karohji, K. Kuroda, O. Asaoka, M. Matsuzaki, M. Ohwada andF. Ogawa (1966): Distribution of plankton collected on board the research vessels of J. M. A. in 1965 (CSK). The Oceanographical Magazine,18(1–2), 91–112.
Kubota, T. (1971): Food of anglerfish,Lophius litulon, obtained from stomachs of lancetfish,Alepisaurus ferox, in Suruga Bay. Bull. Plank. Soc. Japan,18(1), 28–31.
Lebour, M. V. (1922): The food of plankton organisms. J. Mar. Biol. Ass., U.K.,12, 644–677.
Lebour, M. V. (1923): The food of plankton organisms II. J. Mar. Biol. Ass., U.K.,13, 70–92.
Marumo, R. and S.Nagasawa (1972): Community structure of pelagic chaetognaths in Sagami and Suruga Bays. Interim Rep. Kuroshio Littoral Region Research Group for JIBP-PM, 23–27.
Mauchline, J. (1960): The biology of the euphausiid crustaceanMeganyctiphanes norvegica (M. Sars). Proc. Roy. Soc. Edinb.67B, 141–179.
Motoda, S. (1971): Devices of simple plankton apparatus V. Bull. Fac. Fish., Hokkaido Univ.,22(2), 101–106.
Murakami, A. (1957): The occurrence of planktonic chaetognaths in the bay and Inland sea regions. Suisangaku-Syusei, Tokyo Univ., 357–384.
Murakami, A. (1959): Marine biological study on the planktonic chaetognaths in the Seto Inland Sea. Bull. Naikai. Reg. Fish. Res. Lab.,12, 1–186.
Omori, M. (1965): A 160-cm opening-closing plankton net I. Description of the gear. J. Oceanog. Soc. Japan,21(5), 20–26.
Omori, M., R. Marumo andY. Aizawa (1965): A 160-cm opening-closing plankton net II. Some notes on the towing behaviour of the net. J. Oceanog. Soc. Japan,21(6), 9–16.
Omori, M. (1969): Weight and chemical composition of some important oceanic zooplankton in the North Pacific Ocean. Marine Biology,3(1), 4–10.
Parry, D. A. (1944): Structure and function of the gut inSpadella cephaloptera andSagitta setosa. J. Mar. Biol. Ass. U. K.,26. 16–36.
Reeve, M. R. (1964): Feeding of zooplankton, with special reference to some experiments withSagitta. Nature, Lond.,201, 211–213.
Riley, G. A. (1947): A theoretical analysis of the zooplankton population of George Bank. J. Mar. Res.,6, 104–113.
Suárez-Caabro, J. A. (1955): Quetognatos de los mares Cubanos. Mem. Soc. Cubana Hist. nat.,22(2), 125–280.
Takano, H. (1971): Breeding experiments of a marine littoral copepodTigriopus japanicus Mori. Bull. Tokai Reg. Fish. Res. Lab.,64, 71–80.
Thomson, J. M. (1947): The Chaetognatha of south-eastern Australia. Bull. Coun. Scient. Ind. Res.,222, 4–43.
Tokioka, T. (1939): Chaetognaths collected chiefly from the Bays of Sagami and Suruga with some notes on the shape and structure of the seminal vesicles. Rec. Oceanog. Wks. Japan,10(2), 122–150.
Tokioka, T. (1940): The chaetognath fauna of the waters of western Japan. Rec. Oceanog. Wks. Japan,12(1), 1–22.
Tokioka, T. (1942): Systematic studies of the plankton organisms occurring in Iwayama Bay, Palao. VII. A preliminary report on the appendicularian fauna of the bay and the adjacent waters. Palao Tropical Biol. Stat. Studies,2(3), 527–548.
Wimpenny, R. S. (1937): Distribution, breeding and feeding of some important plankton organisms of the southwest North Sea. Fish Invest., Lond.,15, 1–53.
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Nagasawa, S., Marumo, R. Feeding of a pelagic chaetognath,Sagitta nagae Alvariño in Suruga Bay, Central Japan. Journal of the Oceanographical Society of Japan 28, 181–186 (1972). https://doi.org/10.1007/BF02108551
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DOI: https://doi.org/10.1007/BF02108551