Topic
Hyperiidae
About: Hyperiidae is a research topic. Over the lifetime, 30 publications have been published within this topic receiving 515 citations.
Papers
TL;DR: Results indicate that extensive feeding immediately after sea entrance may be more common for post-smolts in the northern and middle parts of Norway, than in the southern fjords, which may be due to spatial and temporal differences in prey availability within and between the different types of fjord systems.
Abstract: Stomach content analyses were conducted on Atlantic salmon Salmo salar post-smolt (average size, 119-154 mm fork length, L F ) caught in eight large Norwegian fjord systems along a north-south geographical axis during 1998-2001. In general, post-smolts from southern Norway showed low feeding intensity in the fjords, whereas extensive feeding was observed in fjords in the northern and middle parts of Norway. The marine diet mainly included different crustaceans and in particular marine pelagic fish larvae (sand-eels Ammodytes spp., herring Clupea harengus and gadoids), but with a substantial spatial and annual variation in prey diversity and feeding intensity. Insects were most frequently taken in the estuary, although fishes often made a large contribution in mass. In contrast, fishes, and to some extent various crustaceans (particularly Hyperiidae, Gammaridae, Euphausiacea and Copepoda) dominated the diet in the middle and outer parts of the fjords, where post-smolts also fed more extensively than in the inner part. The results indicate that extensive feeding immediately after sea entrance may be more common for post-smolts in the northern and middle parts of Norway, than in the southern fjords. The observed differences in post-smolt feeding may be due to spatial and temporal differences in prey availability within and between the different types of fjord systems, and this might influence post-smolt growth and survival.
87 citations
1 Jan 1960
64 citations
TL;DR: Swarms of themisto abyssorum and one of Themisto libellula were observed during four dives of Mir deep-sea manned submersibles in the Norwegian and Greenland Seas at depths of about 1000 m.
Abstract: Swarms of Themisto abyssorum and one of Themisto libellula (Hyperiidea, Hyperiidae) were observed during four dives of Mir deep-sea manned submersibles in the Norwegian and Greenland Seas at depths of about 1000 m. Concentrations of the amphipods in the most dense swarm were as high as high as 25–38 individuals per cubic meter in the layer 100–5 m above the bottom. However, such swarming does not seem to be obligatory for Themisto. The animals picked up (food?) particles directly from the seabed.
35 citations
TL;DR: 27 species which were frequently a part of each other's biological environment in the slope plankton, were assorted into groups by the use of an index derived from the corrected geometric mean of the joint occurrence of pairs of species, following Fager and McGowan (1963).
Abstract: Some 1700 plankton net hauls (642 on the slope reglon of the continental shelf and 1100 in neritic waters) were made during surveys carried out by F.R.V. Wavreen (C.S.1 R., Division of Fisheries) in the eastern Australian Pacific Ocean area between latitudes 24oS. and 44oS from 1938 to 1941. The Tunicata. Euphausiacea, Hyperiidae. Chaetognatha, and Pteropoda totalling 118 species in the slope and shelf hauls were identified by various authors. In this paper 27 species which were frequently a part of each other's biological environment in the slope plankton, were assorted into groups: (1) by the use of an index derived from the corrected geometric mean of the joint occurrence of pairs of species, following Fager and McGowan (1963); and (2) by assessing the significance (using X 2 ) of the departure of a joint occurrence from an expected value calculated on the basis of empirical probability for each pair of species. Groups were set up according to the method of Fager (1957). The tests yielded similar results. Groups found, using test (2), and their tentative water mass affiliations were follows. (i) Central Tasman and south-west Tasman: GROUP A, Sagitta planctonis, S. lyra, S. minima, Krohnitta subtilis, Eukrohnia hamata; GROUP B, Thysanoessa gregaria, Euphausia recurva, N. dificilis, E. spinifera. (ii) South equatorial and Coral Sea: GROUP C, Oikopleura fusiformis, O. cophocerca, O. longicauda; GROUP D Stegosoma magnum, Megalocercus huxleyi, Oikopleura rufescens, Traustedtia multitentaculata, Doliolum denticulatum; GROUP E, Sagitta hexaptera, Pterosagitta draco, S. regularis, S. serratodentata pacifica, S. bipunctata, S. enflata, S. ferox, S. robusta, and Stylocheiuon carinatum. Recent references to the grouped species are discussed. The major affiliations and the temperature, chlorinity, and latitudinal ranges of the three forms of Sagitta serratodentata (tasmanica, atlantica, and pacifica) are set out and a tentative list of the water mass preferences of a number of the ungrouped species is given.
22 citations
1 Jan 1982
20 citations
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Performance Metrics
| Year | Papers |
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| 2020 | 1 |
| 2017 | 1 |
| 2016 | 1 |
| 2015 | 2 |
| 2014 | 1 |
| 2009 | 1 |