Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN
Since the description of Xenocyttus nemotoi ABE in 1957,there have been but a few records of this oreosomatid fish. Recently it is taken from time to time along with the Antarctic krill, and 29 specimens have been received for study. Their size varies very little, standard length being 113mm to 180m...
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National Institute of Polar Research
1981-01-01
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Series: | Antarctic Record |
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doaj-17fb391312b64bb4876470d49aa3ce942020-11-24T21:14:22ZengNational Institute of Polar ResearchAntarctic Record0085-72892432-079X1981-01-017112112910.15094/00008209Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELINTokiharu Abe0Manpei Suzuki1Division of Zoology, University Museum, University of TokyoTokai Regional Fisheries Research LaboratorySince the description of Xenocyttus nemotoi ABE in 1957,there have been but a few records of this oreosomatid fish. Recently it is taken from time to time along with the Antarctic krill, and 29 specimens have been received for study. Their size varies very little, standard length being 113mm to 180mm. This species is now known to occur off Patagonia as well. They are thought to be the young of a much larger fish. Their diet is copepods. In the absence of the holotype of its close ally, Pseudocyttus maculatus GILCHRIST, it is thought advisable to discuss the relationships of Xenocyttus with the other members of the Oreosomatidae and Zeiformes in the future. The flesh of three specimens of Xenocyttus nemotoi measuring some 150mm in standard length contains water (84.2%), crude protein (9.6%), crude fat (3.8%) and crude ash (1.1%). The subcutaneous tissue is fairly hard, and its heat conductivity is ca. 0.60 (kcal/m・h・℃) as against ca. 0.65 in the flesh. Many specimens of Neopagetopsis ionah NYBELIN have been collected since the publishing of the previous paper of this series. It is met with oftener than Xenocyttus nemotoi at fishing grounds of the Antarctic krill. The number of branchiostegals is oftener 9 on either side. At times it is 8 on either side, or 9 on one side and 8 on the other. The young take the Antarctic krill as food, but one larger specimen trawled at depth in the Ross Sea contained Pleuragramma antarcticum BOULENGER in the stomach.http://doi.org/10.15094/00008209 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tokiharu Abe Manpei Suzuki |
spellingShingle |
Tokiharu Abe Manpei Suzuki Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN Antarctic Record |
author_facet |
Tokiharu Abe Manpei Suzuki |
author_sort |
Tokiharu Abe |
title |
Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN |
title_short |
Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN |
title_full |
Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN |
title_fullStr |
Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN |
title_full_unstemmed |
Notes on some fishes associated with the Antarctic krill. II. On Xenocyttus nemotoi ABE, and again on Neopagetopsis ionah NYBELIN |
title_sort |
notes on some fishes associated with the antarctic krill. ii. on xenocyttus nemotoi abe, and again on neopagetopsis ionah nybelin |
publisher |
National Institute of Polar Research |
series |
Antarctic Record |
issn |
0085-7289 2432-079X |
publishDate |
1981-01-01 |
description |
Since the description of Xenocyttus nemotoi ABE in 1957,there have been but a few records of this oreosomatid fish. Recently it is taken from time to time along with the Antarctic krill, and 29 specimens have been received for study. Their size varies very little, standard length being 113mm to 180mm. This species is now known to occur off Patagonia as well. They are thought to be the young of a much larger fish. Their diet is copepods. In the absence of the holotype of its close ally, Pseudocyttus maculatus GILCHRIST, it is thought advisable to discuss the relationships of Xenocyttus with the other members of the Oreosomatidae and Zeiformes in the future. The flesh of three specimens of Xenocyttus nemotoi measuring some 150mm in standard length contains water (84.2%), crude protein (9.6%), crude fat (3.8%) and crude ash (1.1%). The subcutaneous tissue is fairly hard, and its heat conductivity is ca. 0.60 (kcal/m・h・℃) as against ca. 0.65 in the flesh. Many specimens of Neopagetopsis ionah NYBELIN have been collected since the publishing of the previous paper of this series. It is met with oftener than Xenocyttus nemotoi at fishing grounds of the Antarctic krill. The number of branchiostegals is oftener 9 on either side. At times it is 8 on either side, or 9 on one side and 8 on the other. The young take the Antarctic krill as food, but one larger specimen trawled at depth in the Ross Sea contained Pleuragramma antarcticum BOULENGER in the stomach. |
url |
http://doi.org/10.15094/00008209 |
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