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 south-western Ross Sea. From a macroscopic point of view, most specimens of B. marri were juveniles in early stage...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2007
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102007000090 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000090 |
id |
crcambridgeupr:10.1017/s0954102007000090 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102007000090 2024-03-03T08:39:27+00:00 Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei: Bathydraconidae) from the Ross Sea La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. 2007 http://dx.doi.org/10.1017/s0954102007000090 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000090 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 19, issue 1, page 64-70 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2007 crcambridgeupr https://doi.org/10.1017/s0954102007000090 2024-02-08T08:34:59Z 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 south-western 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 Antarctic Science Ross Sea Cambridge University Press Ross Sea Antarctic Science 19 1 64 70 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. Gametogenesis in the dragonfishes Akarotaxis nudiceps and Bathydraco marri (Pisces, Notothenioidei: Bathydraconidae) from the Ross Sea |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
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 south-western 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, Mario Caputo, Vincenzo Eastman, Joseph T. |
author_facet |
La Mesa, Mario Caputo, Vincenzo Eastman, Joseph T. |
author_sort |
La Mesa, Mario |
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 University Press (CUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1017/s0954102007000090 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000090 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarctic Science Ross Sea |
genre_facet |
Antarctic Science Ross Sea |
op_source |
Antarctic Science volume 19, issue 1, page 64-70 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
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_ |
1792495009904197632 |