Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity

Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity

The physiological responses of the blue shrimp were determined by exposing the organisms to temperatures of 23ºC, 28ºC and 33ºC, and salinities of 10, 15, 20, 25, 30, 35 and 40‰. Oxygen consumption of Litopenaeus stylirostris exposed to experimental salinities increased in direct relationship with t...

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Autores principales: Denisse-Re, A, Díaz, F, Sierra, E, Gómez-Jiménez, S
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2004
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/328
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id oai:cienciasmarinas.com.mx:article-328
record_format ojs
institution Ciencias Marinas
collection OJS
language eng
format Online
author Denisse-Re, A
Díaz, F
Sierra, E
Gómez-Jiménez, S
spellingShingle Denisse-Re, A
Díaz, F
Sierra, E
Gómez-Jiménez, S
Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
author_facet Denisse-Re, A
Díaz, F
Sierra, E
Gómez-Jiménez, S
author_sort Denisse-Re, A
title Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
title_short Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
title_full Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
title_fullStr Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
title_full_unstemmed Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity
title_sort oxygen consumption, ammonium excretion and osmoregulatory capacity of litopenaeus stylirostris (stimpson) exposed to different combinations of temperature and salinity
description The physiological responses of the blue shrimp were determined by exposing the organisms to temperatures of 23ºC, 28ºC and 33ºC, and salinities of 10, 15, 20, 25, 30, 35 and 40‰. Oxygen consumption of Litopenaeus stylirostris exposed to experimental salinities increased in direct relationship with temperature, even though at 28ºC the metabolic rate was steady. The ammonium excretion rate in juvenile shrimp acclimated at 23ºC and 33ºC was related to the pattern of osmoregulation, increasing when the shrimp were hyper-regulators and decreasing when they were hypo-regulators. The ammonium excretion rate remained constant in shrimp kept at 28ºC. The osmoregulatory capacity of the juveniles indicated that they were hypo-regulators and hyper-regulators in salinities above and below the isosmotic point, this capacity decreasing in organisms kept at 33ºC and exposed to higher salinities. The isosmotic point obtained ranged from 676.8 to 700.7 mmol kg–1 (23.7–24.6‰). The values of the slopes between the osmotic concentration of the external medium and the hemolymph of shrimp acclimated at 23ºC, 28ºC and 33ºC were 0.25, 0.17 and 0.3, respectively; the lowest value was obtained for juveniles maintained at 28ºC, being strong regulators in this condition. To optimize the culture of L. stylirostris under controlled conditions, we propose that it be cultivated in salinities of 25‰ and temperatures of 28ºC, considered the optimum conditions because in these environments the organisms are free of stress and their growth therefore increases.
publisher Iniversidad Autónoma de Baja California
publishDate 2004
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/328
_version_ 1715723955798540288
spelling oai:cienciasmarinas.com.mx:article-3282019-04-10T23:18:52Z Oxygen consumption, ammonium excretion and osmoregulatory capacity of Litopenaeus stylirostris (Stimpson) exposed to different combinations of temperature and salinity Consumo de oxígeno, excreción de amonio y capacidad osmorreguladora de Litopenaeus stylirostris (Stimpson) expuesto a diferentes combinaciones de temperatura y salinidad Denisse-Re, A Díaz, F Sierra, E Gómez-Jiménez, S oxygen consumption ammonium excretion osmoregulatory capacity temperature and salinity Litopenaeus stylirostris consumo de oxígeno excreción de amonio capacidad osmorreguladora salinidad y temperatura Litopenaeus stylirostris The physiological responses of the blue shrimp were determined by exposing the organisms to temperatures of 23ºC, 28ºC and 33ºC, and salinities of 10, 15, 20, 25, 30, 35 and 40‰. Oxygen consumption of Litopenaeus stylirostris exposed to experimental salinities increased in direct relationship with temperature, even though at 28ºC the metabolic rate was steady. The ammonium excretion rate in juvenile shrimp acclimated at 23ºC and 33ºC was related to the pattern of osmoregulation, increasing when the shrimp were hyper-regulators and decreasing when they were hypo-regulators. The ammonium excretion rate remained constant in shrimp kept at 28ºC. The osmoregulatory capacity of the juveniles indicated that they were hypo-regulators and hyper-regulators in salinities above and below the isosmotic point, this capacity decreasing in organisms kept at 33ºC and exposed to higher salinities. The isosmotic point obtained ranged from 676.8 to 700.7 mmol kg–1 (23.7–24.6‰). The values of the slopes between the osmotic concentration of the external medium and the hemolymph of shrimp acclimated at 23ºC, 28ºC and 33ºC were 0.25, 0.17 and 0.3, respectively; the lowest value was obtained for juveniles maintained at 28ºC, being strong regulators in this condition. To optimize the culture of L. stylirostris under controlled conditions, we propose that it be cultivated in salinities of 25‰ and temperatures of 28ºC, considered the optimum conditions because in these environments the organisms are free of stress and their growth therefore increases. Se determinaron las respuestas fisiológicas del camarón azul al exponer a los organismos a temperaturas de 23, 28 y 33ºC y a salinidades de 10, 15, 20, 25, 30, 35 y 40‰. El consumo de oxígeno de Litopenaeus stylirostris expuesto a las salinidades experimentales se incrementó en relación directa con la temperatura; sin embargo, a 28ºC la tasa metabólica se mantuvo constante. La tasa de excreción de amonio en los juveniles aclimatados a 23ºC y 33ºC se relacionó con el patrón de osmorregulación ya que cuando los camarones hiperregularon ésta se incrementó, y disminuyó cuando hipo-regularon, mientras que en los mantenidos a 28ºC la excreción de amonio permaneció constante. La capacidad osmorreguladora de los juveniles mostró que fueron hiporreguladores e hiperreguladores a salinidades por arriba y por debajo del punto isosmótico, disminuyendo esta capacidad en los organismos mantenidos a 33ºC y expuestos a las altas salinidades. El punto isosmótico de los camarones tuvo un intervalo de 676.8–700.7 mmol kg–1 (23.7–24.6‰). Los valores de las pendientes entre la concentración osmótica del medio y la hemolinfa de los camarones aclimatados a 23ºC, 28ºC y 33ºC fueron 0.25, 0.17 y 0.37, obteniéndose el menor valor de la pendiente en los juveniles mantenidos a 28ºC, condición en la que el camarón azul se caracterizó como fuerte regulador. Para optimizar el cultivo de L. stylirostris en condiciones controladas se proponen salinidades de 25‰ y temperaturas de 28ºC, las cuales se consideran condiciones óptimas para tales ambientes en los que los organismos están libres de estrés ambiental y, por ende, se incrementará su crecimiento. Iniversidad Autónoma de Baja California 2004-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/328 10.7773/cm.v30i3.328 Ciencias Marinas; Vol. 30 No. 3 (2004); 443-453 Ciencias Marinas; Vol. 30 Núm. 3 (2004); 443-453 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/328/281

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