Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean
Ninety six gonatid cephalopod specimens (Oegopsida: Gonatidae) from the University of Amsterdam Mid-North Atlantic Plankton Expeditions were analyzed and two species were identified: Gonatus steenstrupi (Kristensen 1981) and Gonatusfabricii (Lichtenstein 1818). Gonatids were collected only in spring...
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Biological Society of Washington
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ftoceanrep:oai:oceanrep.geomar.de:52970 2023-05-15T17:28:32+02:00 Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean Falcon, Luisa I. Vecchione, Michael Roper, Clyde F. E. 2000 text https://oceanrep.geomar.de/id/eprint/52970/ https://oceanrep.geomar.de/id/eprint/52970/1/3809.pdf en eng Biological Society of Washington https://oceanrep.geomar.de/id/eprint/52970/1/3809.pdf Falcon, L. I., Vecchione, M. and Roper, C. F. E. (2000) Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean. Open Access Proceedings of The Biological Society of Washington, 113 (2). pp. 532-541. info:eu-repo/semantics/openAccess Article PeerReviewed 2000 ftoceanrep 2023-04-07T15:56:45Z Ninety six gonatid cephalopod specimens (Oegopsida: Gonatidae) from the University of Amsterdam Mid-North Atlantic Plankton Expeditions were analyzed and two species were identified: Gonatus steenstrupi (Kristensen 1981) and Gonatusfabricii (Lichtenstein 1818). Gonatids were collected only in spring and summer, despite sampling in autumn and winter. This paper describes aspects of their development and reports their geographical distribution in the central North Atlantic Ocean. Chromatophore patterns were the most consistently useful characters for distinguishing between the species. Among 34 measurements, Tentacle Length (TtL) relative to Dorsal Mantle Length (ML) and number of suckers on Arms I-IV were useful for distinguishing specimens >13 mm ML. Both species develop hooks from suckers on the arms and tentacular clubs at ML > 20 mm. Subtle differences were noted in the morphology of the funnel pads except in the smallest specimens. Specimens of G. steenstrupi >20 mm ML were collected at greater depths (250 to 995 m) than the smaller specimens (found at depths <200 m). Our data suggest that 20 mm ML is the point of transition between paralarvae and juveniles of G. steenstrupi, because specimens larger than 20 mm ML have well defined hooks, and a juvenile vertical distribution is established. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Kristensen ENVELOPE(-159.667,-159.667,-86.333,-86.333) |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Ninety six gonatid cephalopod specimens (Oegopsida: Gonatidae) from the University of Amsterdam Mid-North Atlantic Plankton Expeditions were analyzed and two species were identified: Gonatus steenstrupi (Kristensen 1981) and Gonatusfabricii (Lichtenstein 1818). Gonatids were collected only in spring and summer, despite sampling in autumn and winter. This paper describes aspects of their development and reports their geographical distribution in the central North Atlantic Ocean. Chromatophore patterns were the most consistently useful characters for distinguishing between the species. Among 34 measurements, Tentacle Length (TtL) relative to Dorsal Mantle Length (ML) and number of suckers on Arms I-IV were useful for distinguishing specimens >13 mm ML. Both species develop hooks from suckers on the arms and tentacular clubs at ML > 20 mm. Subtle differences were noted in the morphology of the funnel pads except in the smallest specimens. Specimens of G. steenstrupi >20 mm ML were collected at greater depths (250 to 995 m) than the smaller specimens (found at depths <200 m). Our data suggest that 20 mm ML is the point of transition between paralarvae and juveniles of G. steenstrupi, because specimens larger than 20 mm ML have well defined hooks, and a juvenile vertical distribution is established. |
format |
Article in Journal/Newspaper |
author |
Falcon, Luisa I. Vecchione, Michael Roper, Clyde F. E. |
spellingShingle |
Falcon, Luisa I. Vecchione, Michael Roper, Clyde F. E. Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
author_facet |
Falcon, Luisa I. Vecchione, Michael Roper, Clyde F. E. |
author_sort |
Falcon, Luisa I. |
title |
Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
title_short |
Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
title_full |
Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
title_fullStr |
Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
title_full_unstemmed |
Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean |
title_sort |
paralarval gonatid squids (cephalopoda: oegopsida) from the mid-north atlantic ocean |
publisher |
Biological Society of Washington |
publishDate |
2000 |
url |
https://oceanrep.geomar.de/id/eprint/52970/ https://oceanrep.geomar.de/id/eprint/52970/1/3809.pdf |
long_lat |
ENVELOPE(-159.667,-159.667,-86.333,-86.333) |
geographic |
Kristensen |
geographic_facet |
Kristensen |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/52970/1/3809.pdf Falcon, L. I., Vecchione, M. and Roper, C. F. E. (2000) Paralarval gonatid squids (Cephalopoda: Oegopsida) from the Mid-North Atlantic Ocean. Open Access Proceedings of The Biological Society of Washington, 113 (2). pp. 532-541. |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766121256378171392 |