Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae)
Abstract The squid Gonatus fabricii (Lichtenstein, 1818) is the most abundant pelagic cephalopod in the Arctic and the only squid to spend all of its life cycle in this region. Despite being highly abundant, its reproductive biology remains poorly known, and data on large maturing and mature specime...
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Online Access: | http://dx.doi.org/10.1093/mollus/eyz023 http://academic.oup.com/mollus/article-pdf/85/3/287/34892565/eyz023.pdf |
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croxfordunivpr:10.1093/mollus/eyz023 2024-09-09T19:27:41+00:00 Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) Golikov, Alexey V Blicher, Martin E Jørgensen, Lis L Walkusz, Wojciech Zakharov, Denis V Zimina, Olga L Sabirov, Rushan M Russian Foundation for Basic Research Nordic Council of Ministers Miljøstyrelsen Ministry of Environment and Food of Denmark North Atlantic Cooperation Greenland Institute of Natural Resources 2019 http://dx.doi.org/10.1093/mollus/eyz023 http://academic.oup.com/mollus/article-pdf/85/3/287/34892565/eyz023.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of Molluscan Studies volume 85, issue 3, page 287-299 ISSN 0260-1230 1464-3766 journal-article 2019 croxfordunivpr https://doi.org/10.1093/mollus/eyz023 2024-08-12T04:23:46Z Abstract The squid Gonatus fabricii (Lichtenstein, 1818) is the most abundant pelagic cephalopod in the Arctic and the only squid to spend all of its life cycle in this region. Despite being highly abundant, its reproductive biology remains poorly known, and data on large maturing and mature specimens are especially rare. This study, based on extensive material (51 large specimens and >35,000 specimens in all), fills major gaps in the knowledge of the reproductive biology and ecology of G. fabricii. The fecundity of females ranged from 8,862 to 16,200 oocytes, with mature and late maturing specimens having between 8,862 to c. 10,000 and 11,402 oocytes, respectively. Oogenesis was synchronous, and oocyte resorption was observed; resorbed oocytes constituted up to 23.5% of fecundity. Between two to five ripe oocytes were observed, and these were 4.0–5.5 mm in diameter (maximum dimension). Males possessed between 77 and 257 spermatophores (length = 5.8–10.8 mm). Spermatophores were characterized by a cement body with well-developed collar and discs at the oral end, an ejaculatory apparatus longer than the cement body and the lack of a tapered, sharp tip to the cement body. Spermatophore size showed a uniform increase in relation to increasing male size. In newer spermatophores, the length, width and volume of the seminal reservoir also increased. Females possessed between 62 and 84 spermatangia (length = 1.8–2.6 mm); the spermatangia were present on the buccal membranes and lacked special attachment structures. Seminal receptacles were not found on the buccal membranes of females. Our findings are consistent with the hypothesis of geographically restricted spawning in G. fabricii. The study found evidence for one new breeding area in south-eastern Greenland. No differences in sizes at maturity were found between the breeding areas. Such geographically localized reproduction is relatively common in non-deep-water squids, but is much less common in deep-water squids. Localized reproduction may be especially ... Article in Journal/Newspaper Arctic Greenland Oxford University Press Arctic Greenland Journal of Molluscan Studies 85 3 287 299 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract The squid Gonatus fabricii (Lichtenstein, 1818) is the most abundant pelagic cephalopod in the Arctic and the only squid to spend all of its life cycle in this region. Despite being highly abundant, its reproductive biology remains poorly known, and data on large maturing and mature specimens are especially rare. This study, based on extensive material (51 large specimens and >35,000 specimens in all), fills major gaps in the knowledge of the reproductive biology and ecology of G. fabricii. The fecundity of females ranged from 8,862 to 16,200 oocytes, with mature and late maturing specimens having between 8,862 to c. 10,000 and 11,402 oocytes, respectively. Oogenesis was synchronous, and oocyte resorption was observed; resorbed oocytes constituted up to 23.5% of fecundity. Between two to five ripe oocytes were observed, and these were 4.0–5.5 mm in diameter (maximum dimension). Males possessed between 77 and 257 spermatophores (length = 5.8–10.8 mm). Spermatophores were characterized by a cement body with well-developed collar and discs at the oral end, an ejaculatory apparatus longer than the cement body and the lack of a tapered, sharp tip to the cement body. Spermatophore size showed a uniform increase in relation to increasing male size. In newer spermatophores, the length, width and volume of the seminal reservoir also increased. Females possessed between 62 and 84 spermatangia (length = 1.8–2.6 mm); the spermatangia were present on the buccal membranes and lacked special attachment structures. Seminal receptacles were not found on the buccal membranes of females. Our findings are consistent with the hypothesis of geographically restricted spawning in G. fabricii. The study found evidence for one new breeding area in south-eastern Greenland. No differences in sizes at maturity were found between the breeding areas. Such geographically localized reproduction is relatively common in non-deep-water squids, but is much less common in deep-water squids. Localized reproduction may be especially ... |
author2 |
Russian Foundation for Basic Research Nordic Council of Ministers Miljøstyrelsen Ministry of Environment and Food of Denmark North Atlantic Cooperation Greenland Institute of Natural Resources |
format |
Article in Journal/Newspaper |
author |
Golikov, Alexey V Blicher, Martin E Jørgensen, Lis L Walkusz, Wojciech Zakharov, Denis V Zimina, Olga L Sabirov, Rushan M |
spellingShingle |
Golikov, Alexey V Blicher, Martin E Jørgensen, Lis L Walkusz, Wojciech Zakharov, Denis V Zimina, Olga L Sabirov, Rushan M Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
author_facet |
Golikov, Alexey V Blicher, Martin E Jørgensen, Lis L Walkusz, Wojciech Zakharov, Denis V Zimina, Olga L Sabirov, Rushan M |
author_sort |
Golikov, Alexey V |
title |
Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
title_short |
Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
title_full |
Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
title_fullStr |
Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
title_full_unstemmed |
Reproductive biology and ecology of the boreoatlantic armhook squid Gonatus fabricii(Cephalopoda: Gonatidae) |
title_sort |
reproductive biology and ecology of the boreoatlantic armhook squid gonatus fabricii(cephalopoda: gonatidae) |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/mollus/eyz023 http://academic.oup.com/mollus/article-pdf/85/3/287/34892565/eyz023.pdf |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland |
genre_facet |
Arctic Greenland |
op_source |
Journal of Molluscan Studies volume 85, issue 3, page 287-299 ISSN 0260-1230 1464-3766 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/mollus/eyz023 |
container_title |
Journal of Molluscan Studies |
container_volume |
85 |
container_issue |
3 |
container_start_page |
287 |
op_container_end_page |
299 |
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1809897077396733952 |