Kurzfassung
Hyperoche medusarum (Krøyer), ein räuberischer hyperiider Amphipode, ist in beträchtlicher Zahl im Plankton der Departure Bay vertreten. Im Labor durchgeführte Aufzuchtversuche zeigten, daß Jungtiere, die bei 10° C gehalten wurden, nach etwa 69 Tagen geschlechtsreif wurden und eine neue Brut von je 50 bis 90 Nachkommen produzierten. Frisch geschlüpfte Tiere attackierten sofort Heringslarven, die als Futter dienten. Das Erscheinen der ersten Brut des Jahres im April fällt mit dem Schlüpfen der Heringslarven in der Departure Bay zusammen. Magenuntersuchungen gaben Anlaß zu der Vermutung, daß neben Copepoden Heringslarven einen beträchtlichen Prozentsatz der Nahrung fürHyperoche medusarum ausmachen.
Summary
1.Hyperoche medusarum Krøyer, a predatory hyperiid amphipod, occurs in considerable numbers in Departure Bay, Nanaimo, Canada.
2. One full reproductive cycle at 10° C takes about 69 days. Females mature at a head plus thorax length of 3.09 mm (total length about 6.5 mm) laying 50 to 90 eggs. Newly bornHyperoche medusarum immediately attack and feed on herring larvae if available.
3. The first brood of the year ofHyperoche medusarum in Departure Bay co-occurs with newly hatched herring larvae.
4. From stomach analyses it appeared that, aside from copepods, herring larvae constitute a major part of the hyperiids' diet.
Article PDF
Literature cited
Bowman, T. E., 1953. The systematics and distribution of pelagic amphipods of the families Vibiliidae, Paraphronimidae, Hyperiidae, Daitellidae, and Phrosinidae from the northeastern Pacific. Thesis Univ. of Calif., Los Angeles, 430 pp.
—— &Hicks, S. D., 1963. Notes on associations between hyperiid amphipods and medusae in Chesapeake and Narangansett Bays and the Niantic River. Chesapeake Sci.4, 141–146.
Bulnheim, H.-P., 1965. Untersuchungen über die Intersexualität beiGammarus duebeni (Crustacea, Amphipoda). Helgoländer wiss. Meeresunters.12, 349–394.
Dunbar, M. J., 1963. Amphipoda. Sub-order: Hyperiidae Family: Hyperiidae. Fich. Ident. Zooplancton103, 2–4.
Evans, F. &Sheader, M., 1972. Host species of the hyperiid amphipodHyperoche medusarum (Krøyer) in the North Sea. Crustaceana (Suppl.)3, 275–276.
Hurley, D. E., 1956. Bathypelagic and other Hyperiidea from California waters. Occ. Pap. Allan Hancock Fdn18, 1–25.
Lorz, H. V. &Pearcy, W. G., 1975. Distribution of hyperiid amphipods off the Oregon coast. J. Fish. Res. Bd Can.32, 1442–1447.
Sars, G. O., 1895. An account of the crustacea of Norway. Cammermeyer, Christiania1, 1–711.
Sheader, M. &Evans, F., 1975. Feeding and gut structure ofParathemisto gaudichaudi (Guerin) (Amphipoda, Hyperiidea). J. mar. biol. Ass. U.K.55, 641–656.
Shoemaker, C. R., 1930. The amphipoda of the Cheticamp expedition of 1917. Contr. Can. Biol. Fish.5, 221–359.
Steele, D. H. &Steele, V. J., 1969. The biology ofGammarus (Crustacea, Amphipoda) in the northwestern Atlantic. I.Gammarus duebeni Lillj. Can. J. Zool.47, 235–244.
—— 1970. The biology ofGammarus (Crustacea, Amphipoda) in the northwestern Atlantic. IV.Gammarus lawrencianus Bousfield. Can. J. Zool.48, 1261–1267.
—— 1973. Some aspects of the biology ofCalliopius laeviusculus (Krøyer) (Crustacea, Amphipoda) in the northwestern Atlantic. Can. J. Zool.51, 723–728.
Westernhagen, H. von &Rosenthal, H., 1976. Predator-prey relationship between herring larvae (Clupea pallasii) and a predatory hyperiid amphipod (Hyperoche medusarum). Fish. Bull.74 (in press).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
von Westernhagen, H. Some aspects of the biology of the hyperiid amphipodHyperoche medusarum . Helgolander Wiss. Meeresunters 28, 43–50 (1976). https://doi.org/10.1007/BF01610795
Issue Date:
DOI: https://doi.org/10.1007/BF01610795