Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res
The ratio of N. coriiceps to N. rossii individuals in catches regularly increased during 22 years from 0.4 in 1977 to 9.5 in 1999. Oving to its reproductive strategy and avoidance of shallow waters N. rossii may be more vulnerable to overfishing. The condition factor was the most stable (CV 6–10%),...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2002
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.3925 http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.575.3925 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.575.3925 2023-05-15T13:30:31+02:00 Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res Ewa Kamler Zakład Rybactwa Stawowego Instytutu Rybactwa Śródlądowego The Pennsylvania State University CiteSeerX Archives 2002 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.3925 http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.3925 http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf text 2002 ftciteseerx 2016-01-08T12:43:38Z The ratio of N. coriiceps to N. rossii individuals in catches regularly increased during 22 years from 0.4 in 1977 to 9.5 in 1999. Oving to its reproductive strategy and avoidance of shallow waters N. rossii may be more vulnerable to overfishing. The condition factor was the most stable (CV 6–10%), variations in the of hepatosomatic index and index of stomach fullness were intermediate (21–38 % and 40–43%, respectively), and the gonadosomatic in− dex was the most variable (65–100%). Lack of seasonality in two somatic indices (condi− tion factor and index of stomach fullness) in N. coriiceps adults is a direct effect of high food availability and unlimited food detection all year round. In contrast, the seasonality of a reproductive index (gonadosomatic index) of these fish is a response to the highly sea− sonal trophic conditions for pelagic larvae. Key words: Antarctica, notothenioid fishes, endangered species, seasonal changes. Text Antarc* Antarctica Unknown Admiralty Bay |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
The ratio of N. coriiceps to N. rossii individuals in catches regularly increased during 22 years from 0.4 in 1977 to 9.5 in 1999. Oving to its reproductive strategy and avoidance of shallow waters N. rossii may be more vulnerable to overfishing. The condition factor was the most stable (CV 6–10%), variations in the of hepatosomatic index and index of stomach fullness were intermediate (21–38 % and 40–43%, respectively), and the gonadosomatic in− dex was the most variable (65–100%). Lack of seasonality in two somatic indices (condi− tion factor and index of stomach fullness) in N. coriiceps adults is a direct effect of high food availability and unlimited food detection all year round. In contrast, the seasonality of a reproductive index (gonadosomatic index) of these fish is a response to the highly sea− sonal trophic conditions for pelagic larvae. Key words: Antarctica, notothenioid fishes, endangered species, seasonal changes. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Ewa Kamler Zakład Rybactwa Stawowego Instytutu Rybactwa Śródlądowego |
spellingShingle |
Ewa Kamler Zakład Rybactwa Stawowego Instytutu Rybactwa Śródlądowego Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
author_facet |
Ewa Kamler Zakład Rybactwa Stawowego Instytutu Rybactwa Śródlądowego |
author_sort |
Ewa Kamler |
title |
Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
title_short |
Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
title_full |
Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
title_fullStr |
Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
title_full_unstemmed |
Inter-individual and seasonal variability of biological indices in notothenioid fishes from Admiralty Bay, Antarctica – Pol. Polar Res |
title_sort |
inter-individual and seasonal variability of biological indices in notothenioid fishes from admiralty bay, antarctica – pol. polar res |
publishDate |
2002 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.3925 http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf |
geographic |
Admiralty Bay |
geographic_facet |
Admiralty Bay |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.575.3925 http://www.polish.polar.pan.pl/ppr23/ppr23-265.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766009581404684288 |