First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic
Abstract The Tristan klipfish, Bovichtus diacanthus , an endemic species at Tristan da Cunha Island was successfully aged using whole sagittal otoliths. The annulation pattern was clear, resulting in an alternating combination of opaque and translucent zones that form an annulus. Although sampling l...
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Online Access: | http://dx.doi.org/10.1017/s0954102011000733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000733 |
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crcambridgeupr:10.1017/s0954102011000733 2024-03-03T08:39:25+00:00 First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic La Mesa, Mario Eastman, Joseph T. 2011 http://dx.doi.org/10.1017/s0954102011000733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000733 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 24, issue 2, page 115-120 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2011 crcambridgeupr https://doi.org/10.1017/s0954102011000733 2024-02-08T08:33:40Z Abstract The Tristan klipfish, Bovichtus diacanthus , an endemic species at Tristan da Cunha Island was successfully aged using whole sagittal otoliths. The annulation pattern was clear, resulting in an alternating combination of opaque and translucent zones that form an annulus. Although sampling limitations did not allow direct validation of annual ring deposition, most otoliths showed a translucent edge, perhaps suggesting that the deposition of translucent zones is a synchronous process which takes place in winter coincident with the spawning season. The reliability of ageing methodology was supported by the good agreement between readings. The maximum age was estimated to be five years in females and four years in males. In order to increase the small number of direct readings, the length at age was back-calculated for each fish by fitting growth curves. The resulting growth of B. diacanthus was described by the von Bertalanffy growth model, as summarized by the following parameters: L ∞ = 207.1 mm TL, k = 0.49 per year, and t 0 = 0.04 years. The size at which 50% of the population spawns for the first time was c . 147 mm, corresponding to 2.5 years of age. Article in Journal/Newspaper Antarctic Science Cambridge University Press Tristan ENVELOPE(140.900,140.900,-66.735,-66.735) Antarctic Science 24 2 115 120 |
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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 Eastman, Joseph T. First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract The Tristan klipfish, Bovichtus diacanthus , an endemic species at Tristan da Cunha Island was successfully aged using whole sagittal otoliths. The annulation pattern was clear, resulting in an alternating combination of opaque and translucent zones that form an annulus. Although sampling limitations did not allow direct validation of annual ring deposition, most otoliths showed a translucent edge, perhaps suggesting that the deposition of translucent zones is a synchronous process which takes place in winter coincident with the spawning season. The reliability of ageing methodology was supported by the good agreement between readings. The maximum age was estimated to be five years in females and four years in males. In order to increase the small number of direct readings, the length at age was back-calculated for each fish by fitting growth curves. The resulting growth of B. diacanthus was described by the von Bertalanffy growth model, as summarized by the following parameters: L ∞ = 207.1 mm TL, k = 0.49 per year, and t 0 = 0.04 years. The size at which 50% of the population spawns for the first time was c . 147 mm, corresponding to 2.5 years of age. |
format |
Article in Journal/Newspaper |
author |
La Mesa, Mario Eastman, Joseph T. |
author_facet |
La Mesa, Mario Eastman, Joseph T. |
author_sort |
La Mesa, Mario |
title |
First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
title_short |
First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
title_full |
First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
title_fullStr |
First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
title_full_unstemmed |
First data on age and sexual maturity of the Tristan klipfish, Bovichtus diacanthus (Bovichtidae) from Tristan da Cunha, South Atlantic |
title_sort |
first data on age and sexual maturity of the tristan klipfish, bovichtus diacanthus (bovichtidae) from tristan da cunha, south atlantic |
publisher |
Cambridge University Press (CUP) |
publishDate |
2011 |
url |
http://dx.doi.org/10.1017/s0954102011000733 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102011000733 |
long_lat |
ENVELOPE(140.900,140.900,-66.735,-66.735) |
geographic |
Tristan |
geographic_facet |
Tristan |
genre |
Antarctic Science |
genre_facet |
Antarctic Science |
op_source |
Antarctic Science volume 24, issue 2, page 115-120 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102011000733 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
2 |
container_start_page |
115 |
op_container_end_page |
120 |
_version_ |
1792494933079228416 |