Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc.
Notothenia coriiceps and Notothenia rossii are two widespread nototheniid fishes, that live sympatrically along the southern Scotia Arc from South Georgia to the South Shetland Islands. In this sector of the Southern Ocean, they experienced different exploitation rates in the past and exhibit differ...
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ftunivpadovairis:oai:www.research.unipd.it:11577/3220163 2024-04-21T08:08:48+00:00 Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. Calì, Federico RIGINELLA, EMILIO La Mesa, Mario MAZZOLDI, CARLOTTA Calì, Federico Riginella, Emilio La Mesa, Mario Mazzoldi, Carlotta 2017 STAMPA http://hdl.handle.net/11577/3220163 https://doi.org/10.1007/s00300-016-2066-z eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000406338800007 volume:40 issue:- firstpage:1409 lastpage:1423 numberofpages:15 journal:POLAR BIOLOGY http://hdl.handle.net/11577/3220163 doi:10.1007/s00300-016-2066-z info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008441698 Fecundity Gonad Reproduction Otoliths Age structure Nototheniidae info:eu-repo/semantics/article 2017 ftunivpadovairis https://doi.org/10.1007/s00300-016-2066-z 2024-03-28T01:56:40Z Notothenia coriiceps and Notothenia rossii are two widespread nototheniid fishes, that live sympatrically along the southern Scotia Arc from South Georgia to the South Shetland Islands. In this sector of the Southern Ocean, they experienced different exploitation rates in the past and exhibit different habitat and food preferences as adult. Aiming to evaluate the influence of these factors in shaping life history traits of these species, we compare the reproductive investment and the age structure between the species and in N. rossii, between populations inhabiting different areas. Based on histological analyses, the two species share the same pattern of gamete development in both sexes. The potential fecundity was similar and was positively related to fish size in both species, being relatively high with respect to other notothenioids and in terms of egg size at deposition. Based on sagittal otolith readings, the growth rate and maximum age recorded differed significantly between the two species. Notothenia rossii exhibited a higher growth rate and a comparatively lower maximum age than N. coriiceps. Similarly, N. rossii attained sexual maturity at the same age but at a larger size than N. coriiceps. At the intraspecific level, no differences in life history traits were observed between the populations of N. rossii collected from different areas. Consistent with the different levels of fishing pressure exerted on these species and their low resilience, a recent significant decrease over time in the maximum fish size and related reproductive potential has been observed only in the overexploited populations of N. rossii. Article in Journal/Newspaper Notothenia rossii South Shetland Islands Southern Ocean Padua Research Archive (IRIS - Università degli Studi di Padova) Polar Biology 40 7 1409 1423 |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
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ftunivpadovairis |
language |
English |
topic |
Fecundity Gonad Reproduction Otoliths Age structure Nototheniidae |
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Fecundity Gonad Reproduction Otoliths Age structure Nototheniidae Calì, Federico RIGINELLA, EMILIO La Mesa, Mario MAZZOLDI, CARLOTTA Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
topic_facet |
Fecundity Gonad Reproduction Otoliths Age structure Nototheniidae |
description |
Notothenia coriiceps and Notothenia rossii are two widespread nototheniid fishes, that live sympatrically along the southern Scotia Arc from South Georgia to the South Shetland Islands. In this sector of the Southern Ocean, they experienced different exploitation rates in the past and exhibit different habitat and food preferences as adult. Aiming to evaluate the influence of these factors in shaping life history traits of these species, we compare the reproductive investment and the age structure between the species and in N. rossii, between populations inhabiting different areas. Based on histological analyses, the two species share the same pattern of gamete development in both sexes. The potential fecundity was similar and was positively related to fish size in both species, being relatively high with respect to other notothenioids and in terms of egg size at deposition. Based on sagittal otolith readings, the growth rate and maximum age recorded differed significantly between the two species. Notothenia rossii exhibited a higher growth rate and a comparatively lower maximum age than N. coriiceps. Similarly, N. rossii attained sexual maturity at the same age but at a larger size than N. coriiceps. At the intraspecific level, no differences in life history traits were observed between the populations of N. rossii collected from different areas. Consistent with the different levels of fishing pressure exerted on these species and their low resilience, a recent significant decrease over time in the maximum fish size and related reproductive potential has been observed only in the overexploited populations of N. rossii. |
author2 |
Calì, Federico Riginella, Emilio La Mesa, Mario Mazzoldi, Carlotta |
format |
Article in Journal/Newspaper |
author |
Calì, Federico RIGINELLA, EMILIO La Mesa, Mario MAZZOLDI, CARLOTTA |
author_facet |
Calì, Federico RIGINELLA, EMILIO La Mesa, Mario MAZZOLDI, CARLOTTA |
author_sort |
Calì, Federico |
title |
Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
title_short |
Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
title_full |
Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
title_fullStr |
Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
title_full_unstemmed |
Life history traits of Notothenia rossii and N. coriiceps along the Southern Scotia Arc. |
title_sort |
life history traits of notothenia rossii and n. coriiceps along the southern scotia arc. |
publishDate |
2017 |
url |
http://hdl.handle.net/11577/3220163 https://doi.org/10.1007/s00300-016-2066-z |
genre |
Notothenia rossii South Shetland Islands Southern Ocean |
genre_facet |
Notothenia rossii South Shetland Islands Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000406338800007 volume:40 issue:- firstpage:1409 lastpage:1423 numberofpages:15 journal:POLAR BIOLOGY http://hdl.handle.net/11577/3220163 doi:10.1007/s00300-016-2066-z info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008441698 |
op_doi |
https://doi.org/10.1007/s00300-016-2066-z |
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Polar Biology |
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1409 |
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