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Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.

The present study examines the influence that environmental variables exerted on changes in condition index (CI), shell height (SH?dorsal-ventral axis) and soft tissue mass increments (STM) of the winged oyster Pteria colymbus in suspended culture during periods of upwelling (December to April) and...

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Autores Principales: Lodeiros, C?sar, Freites, Luis
Formato: Artículos
Lenguaje:eng
Publicado: Pa?ses Bajos : Springer International Publishing 2017
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CONDITION INDEX
GROWTH
PEARL OYSTER
SUSPENDED CULTURE
UPWELLING PERIOD
Acceso en línea:http://repositorio.educacionsuperior.gob.ec/handle/28000/4653
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spelling oai:localhost:28000-46532017-11-13T16:40:01Z Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods. Lodeiros, C?sar Freites, Luis CONDITION INDEX GROWTH PEARL OYSTER SUSPENDED CULTURE UPWELLING PERIOD The present study examines the influence that environmental variables exerted on changes in condition index (CI), shell height (SH?dorsal-ventral axis) and soft tissue mass increments (STM) of the winged oyster Pteria colymbus in suspended culture during periods of upwelling (December to April) and non-upwelling (August to November) in the Cariaco Gulf, northeastern Venezuela. Environmental variables recorded between April 2012 and May 2013 included seston, water transparency, temperature, dissolved oxygen, chlorophyll a (Chl a) and the upwelling index (UI). Individuals were cultivated in lantern nets with an overall density of 56 individuals/0.123 m2. From three randomly chosen baskets, five individuals were sampled each month and changes in CI, STM and SH were related to the environmental variables using Spearman correlation and PCA. Results show that during upwelling, both Chl a and UI presented a positive and significant relationship with the oyster condition and growth parameters. During non-upwelling (low UI), this relationship was inverse, demonstrating the important influence of upwelling and non-upwelling periods on the ecophysiology of the species. Furthermore, it was shown that the non-upwelling, characterized by high temperatures and low food availability, is a critical period for P. colymbus, judging by a decrease in growth and survival rate. Nonetheless, this species reached 50 mm in 5 months, a size considered as commercially viable, suggesting that the study area is favourable to the cultivation of the winged oyster despite a dramatic decrease in upwelling intensity in the last decade. https://link.springer.com/article/10.1007/s10499-017-0141-2 2017-10-17T15:20:52Z 2017-10-17T15:20:52Z 2017 article Freites, L. et al. (2017) Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods. Aquaculture International. Paises Bajos. vol.25 pp. 1653-1666 1573-143X http://repositorio.educacionsuperior.gob.ec/handle/28000/4653 eng DOI;https://doi.org/10.1007/s10499-017-0141-2 closedAccess http://creativecommons.org/licenses/by-nc-sa/3.0/ec/ pp. 1653-1666 Pa?ses Bajos : Springer International Publishing
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Artículos
topic CONDITION INDEX
GROWTH
PEARL OYSTER
SUSPENDED CULTURE
UPWELLING PERIOD
spellingShingle CONDITION INDEX
GROWTH
PEARL OYSTER
SUSPENDED CULTURE
UPWELLING PERIOD
Lodeiros, C?sar
Freites, Luis
Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
description The present study examines the influence that environmental variables exerted on changes in condition index (CI), shell height (SH?dorsal-ventral axis) and soft tissue mass increments (STM) of the winged oyster Pteria colymbus in suspended culture during periods of upwelling (December to April) and non-upwelling (August to November) in the Cariaco Gulf, northeastern Venezuela. Environmental variables recorded between April 2012 and May 2013 included seston, water transparency, temperature, dissolved oxygen, chlorophyll a (Chl a) and the upwelling index (UI). Individuals were cultivated in lantern nets with an overall density of 56 individuals/0.123 m2. From three randomly chosen baskets, five individuals were sampled each month and changes in CI, STM and SH were related to the environmental variables using Spearman correlation and PCA. Results show that during upwelling, both Chl a and UI presented a positive and significant relationship with the oyster condition and growth parameters. During non-upwelling (low UI), this relationship was inverse, demonstrating the important influence of upwelling and non-upwelling periods on the ecophysiology of the species. Furthermore, it was shown that the non-upwelling, characterized by high temperatures and low food availability, is a critical period for P. colymbus, judging by a decrease in growth and survival rate. Nonetheless, this species reached 50 mm in 5 months, a size considered as commercially viable, suggesting that the study area is favourable to the cultivation of the winged oyster despite a dramatic decrease in upwelling intensity in the last decade.
author Lodeiros, C?sar
Freites, Luis
author_facet Lodeiros, C?sar
Freites, Luis
author_sort Lodeiros, C?sar
title Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
title_short Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
title_full Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
title_fullStr Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
title_full_unstemmed Growth and survival of the winged oyster Pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
title_sort growth and survival of the winged oyster pteria colymbus in suspended culture: influence of environmental factors associated to upwelling periods.
publisher Pa?ses Bajos : Springer International Publishing
publishDate 2017
url http://repositorio.educacionsuperior.gob.ec/handle/28000/4653
_version_ 1634995270912573440
score 11,871979

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