Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea
We analysed histological characteristics of gonads and reproductive effort of the small deep-living dragonfishes Akarotaxis nudiceps (Waite) and Bathydraco marri Norman collected in the southwestern Ross Sea. From a macroscopic point of view, most specimens of B. marri were juveniles in early stages...
Published in: | Antarctic Science |
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Language: | English |
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CAMBRIDGE UNIV PRESS
2007
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ftpuma:oai:pumaoai.isti.cnr.it:cnr.ismar/cnr.ismar.an/2007-A0-002 2023-05-15T13:38:08+02:00 Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea La Mesa, M. Caputo, V. Eastman, J.T. 2007 application/pdf http://puma.isti.cnr.it/dfdownloadnew.php?ident=cnr.ismar/cnr.ismar.an/2007-A0-002 http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ismar/cnr.ismar.an/2007-A0-002/2007-A0-002.pdf en eng CAMBRIDGE UNIV PRESS info:eu-repo/grantAgreement/EC/FP7/274110/EU/Mining for new antimicrobials in ant associated actinomycetes/ANT info:eu-repo/semantics/altIdentifier/issn/0954-1020 info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102007000090 info:eu-repo/semantics/restrictedAccess In: Antarctic Science, vol. 19 (1) pp. 64 - 70. CAMBRIDGE UNIV PRESS, 2007. Antarctica bathydraconid histology oogenesis reproduction spermatogenesis info:eu-repo/semantics/article 2007 ftpuma https://doi.org/10.1017/S0954102007000090 2017-06-15T09:21:15Z We analysed histological characteristics of gonads and reproductive effort of the small deep-living dragonfishes Akarotaxis nudiceps (Waite) and Bathydraco marri Norman collected in the southwestern Ross Sea. From a macroscopic point of view, most specimens of B. marri were juveniles in early stages of gonad maturity, except for a maturing female. Conversely, the sample of A. nudiceps was composed of both immature and adult fish in different stages of maturity. A single A. nudiceps female was mature with a gonadosomatic index of 9.8%. Its absolute and relative fecundity was 260 oocytes and 31.5 oocytes g(-1) TW, respectively, with a mean size of ripe oocytes of 1.9 mm. Gametogenesis in both species closely resembled that observed in other notothenioids, with females possessing two well-defined groups of oocytes. One group consisted of previtellogenic oocytes as a reserve stock while the other group was maturing oocytes to be ovulated in the current spawning season. A distinctive feature of oogenesis in recovering and maturing females of A. nudiceps was the presence of both postovulatory follicles in different stages of reabsorption and atretic oocytes. Based on low absolute fecundity, it is possible that A. nudiceps provides parental care and egg guarding. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Ross Sea PUMAlab (ISTI CNR - National Research Council) Ross Sea Antarctic Science 19 1 64 70 |
institution |
Open Polar |
collection |
PUMAlab (ISTI CNR - National Research Council) |
op_collection_id |
ftpuma |
language |
English |
topic |
Antarctica bathydraconid histology oogenesis reproduction spermatogenesis |
spellingShingle |
Antarctica bathydraconid histology oogenesis reproduction spermatogenesis La Mesa, M. Caputo, V. Eastman, J.T. Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
topic_facet |
Antarctica bathydraconid histology oogenesis reproduction spermatogenesis |
description |
We analysed histological characteristics of gonads and reproductive effort of the small deep-living dragonfishes Akarotaxis nudiceps (Waite) and Bathydraco marri Norman collected in the southwestern Ross Sea. From a macroscopic point of view, most specimens of B. marri were juveniles in early stages of gonad maturity, except for a maturing female. Conversely, the sample of A. nudiceps was composed of both immature and adult fish in different stages of maturity. A single A. nudiceps female was mature with a gonadosomatic index of 9.8%. Its absolute and relative fecundity was 260 oocytes and 31.5 oocytes g(-1) TW, respectively, with a mean size of ripe oocytes of 1.9 mm. Gametogenesis in both species closely resembled that observed in other notothenioids, with females possessing two well-defined groups of oocytes. One group consisted of previtellogenic oocytes as a reserve stock while the other group was maturing oocytes to be ovulated in the current spawning season. A distinctive feature of oogenesis in recovering and maturing females of A. nudiceps was the presence of both postovulatory follicles in different stages of reabsorption and atretic oocytes. Based on low absolute fecundity, it is possible that A. nudiceps provides parental care and egg guarding. |
format |
Article in Journal/Newspaper |
author |
La Mesa, M. Caputo, V. Eastman, J.T. |
author_facet |
La Mesa, M. Caputo, V. Eastman, J.T. |
author_sort |
La Mesa, M. |
title |
Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
title_short |
Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
title_full |
Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
title_fullStr |
Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
title_full_unstemmed |
Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei : Bathydraconidae) from the Ross Sea |
title_sort |
gametogenesis in the dragonfishes akarotaxis nudiceps and bathydraco marri (pisces, notothenioidei : bathydraconidae) from the ross sea |
publisher |
CAMBRIDGE UNIV PRESS |
publishDate |
2007 |
url |
http://puma.isti.cnr.it/dfdownloadnew.php?ident=cnr.ismar/cnr.ismar.an/2007-A0-002 http://puma.isti.cnr.it/rmydownload.php?filename=cnr.ismar/cnr.ismar.an/2007-A0-002/2007-A0-002.pdf |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctic Science Antarctica Ross Sea |
genre_facet |
Antarc* Antarctic Science Antarctica Ross Sea |
op_source |
In: Antarctic Science, vol. 19 (1) pp. 64 - 70. CAMBRIDGE UNIV PRESS, 2007. |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/274110/EU/Mining for new antimicrobials in ant associated actinomycetes/ANT info:eu-repo/semantics/altIdentifier/issn/0954-1020 info:eu-repo/semantics/altIdentifier/doi/10.1017/S0954102007000090 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1017/S0954102007000090 |
container_title |
Antarctic Science |
container_volume |
19 |
container_issue |
1 |
container_start_page |
64 |
op_container_end_page |
70 |
_version_ |
1766101822002429952 |