The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)

Climate Change includes an increase of both the concentration of atmospheric CO2 and of global temperature. Embryos (= eggs) of Odontesthes hatcheri were collected in spring–summer from the littoral of Lake Morenito (Andes of Argentina). Embryos and free embryos were exposed to different temperatur...

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Autores principales: Crichigno, Sonia Alejandra, Cussac, Victor Enrique
Formato: Articulo article acceptedVersion
Lenguaje:Inglés
Publicado: Springer 2022
Materias:
Acidification
Climate change
Early life
Global warming
Silverside
Ciencias de la Tierra y Medio Ambiente
Acceso en línea:http://rdi.uncoma.edu.ar/handle/uncomaid/17145
Aporte de:
Repositorio Institucional UNCo de Universidad Nacional del Comahue
id I22-R178-uncomaid-17145
record_format dspace
institution Universidad Nacional del Comahue
institution_str I-22
repository_str R-178
collection Repositorio Institucional UNCo
language Inglés
topic Acidification
Climate change
Early life
Global warming
Silverside
Ciencias de la Tierra y Medio Ambiente
spellingShingle Acidification
Climate change
Early life
Global warming
Silverside
Ciencias de la Tierra y Medio Ambiente
Crichigno, Sonia Alejandra
Cussac, Victor Enrique
The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
topic_facet Acidification
Climate change
Early life
Global warming
Silverside
Ciencias de la Tierra y Medio Ambiente
description Climate Change includes an increase of both the concentration of atmospheric CO2 and of global temperature. Embryos (= eggs) of Odontesthes hatcheri were collected in spring–summer from the littoral of Lake Morenito (Andes of Argentina). Embryos and free embryos were exposed to different temperatures (within a currently natural thermal range) and CO2 levels (obtained by bubbling lake water with gaseous CO2). High temperature and high CO2 led to low embryonic survival. Embryonic abnormalities were observed. Incidence of colorless blood cells and delayed dorsal pigmentation increased significantly at high CO2 level. Free embryo survival decreased with time, being particularly low at high CO2 level. Free embryo body shape also signaled the effects of high CO2. The combined effect of temperature and CO2 was additive. As temperature and atmospheric pCO2 increasing continues, the best survival at hatching observed in our experiments (50– 60%, pH 7.5, 14 °C) will deteriorate (< 20% at 18 °C and pH 7.0). These Climate Change-related results and the fact that the species is already threatened by translocated species suggest a fragile situation. Spatial variation of temperature and pCO2 led us to reconsider the suitability of shallow littoral vegetated areas of the lakes as anti-predatory refuges for fish early life periods.
format Articulo
article
acceptedVersion
author Crichigno, Sonia Alejandra
Cussac, Victor Enrique
author_facet Crichigno, Sonia Alejandra
Cussac, Victor Enrique
author_sort Crichigno, Sonia Alejandra
title The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
title_short The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
title_full The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
title_fullStr The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
title_full_unstemmed The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae)
title_sort effects of co2 level and temperature on embryos and free embryos of the patagonian pejerrey odontesthes hatcheri (actinopterygii, atherinopsidae)
publisher Springer
publishDate 2022
url http://rdi.uncoma.edu.ar/handle/uncomaid/17145
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spelling I22-R178-uncomaid-171452023-10-18T14:08:05Z The effects of CO2 level and temperature on embryos and free embryos of the Patagonian pejerrey Odontesthes hatcheri (Actinopterygii, Atherinopsidae) Crichigno, Sonia Alejandra Cussac, Victor Enrique Acidification Climate change Early life Global warming Silverside Ciencias de la Tierra y Medio Ambiente Climate Change includes an increase of both the concentration of atmospheric CO2 and of global temperature. Embryos (= eggs) of Odontesthes hatcheri were collected in spring–summer from the littoral of Lake Morenito (Andes of Argentina). Embryos and free embryos were exposed to different temperatures (within a currently natural thermal range) and CO2 levels (obtained by bubbling lake water with gaseous CO2). High temperature and high CO2 led to low embryonic survival. Embryonic abnormalities were observed. Incidence of colorless blood cells and delayed dorsal pigmentation increased significantly at high CO2 level. Free embryo survival decreased with time, being particularly low at high CO2 level. Free embryo body shape also signaled the effects of high CO2. The combined effect of temperature and CO2 was additive. As temperature and atmospheric pCO2 increasing continues, the best survival at hatching observed in our experiments (50– 60%, pH 7.5, 14 °C) will deteriorate (< 20% at 18 °C and pH 7.0). These Climate Change-related results and the fact that the species is already threatened by translocated species suggest a fragile situation. Spatial variation of temperature and pCO2 led us to reconsider the suitability of shallow littoral vegetated areas of the lakes as anti-predatory refuges for fish early life periods. El Cambio Climático incluye un aumento tanto de la concentración de CO 2 atmosférico como de la temperatura global. Se recolectaron embriones (= huevos) de Odontesthes hatcheri en primavera-verano en el litoral del lago Morenito (Andes de Argentina). Los embriones y los embriones libres fueron expuestos a diferentes temperaturas (dentro de un rango térmico natural actual) y niveles de CO 2 (obtenidos burbujeando agua de lago con CO 2 gaseoso ). Las altas temperaturas y el alto nivel de CO 2 condujeron a una baja supervivencia embrionaria. Se observaron anomalías embrionarias. La incidencia de células sanguíneas incoloras y de pigmentación dorsal retrasada aumentó significativamente con niveles elevados de CO2 . La supervivencia de los embriones libres disminuyó con el tiempo, siendo particularmente baja con niveles elevados de CO2 . La forma del cuerpo del embrión libre también señaló los efectos del alto nivel de CO 2 . El efecto combinado de la temperatura y el CO 2 fue aditivo. A medida que la temperatura y la pCO 2 atmosférica continúan aumentando, la mejor supervivencia al momento de la eclosión observada en nuestros experimentos (50–60%, pH 7,5, 14 °C) se deteriorará (<20% a 18 °C y pH 7,0). Estos resultados relacionados con el cambio climático y el hecho de que la especie ya esté amenazada por especies translocadas sugieren una situación frágil. La variación espacial de la temperatura y la pCO 2 nos llevó a reconsiderar la idoneidad de las áreas con vegetación litoral poco profunda de los lagos como refugios anti-depredadores para los primeros períodos de vida de los peces. Fil: Crichigno, Sonia Alejandra. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Fil: Crichigno, Sonia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina. Fil: Cussac, Victor Enrique. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Fil: Cussac, Victor Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina. 2022-09-29 2023-05-09T16:34:38Z 2023-05-09T16:34:38Z Articulo article acceptedVersion 0018-8158 http://rdi.uncoma.edu.ar/handle/uncomaid/17145 eng https://link.springer.com/article/10.1007/s10750-022-05016-2 Atribución-NoComercial-CompartirIgual 2.5 Argentina https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ application/pdf pp. 4787–4801 application/pdf Springer Hydrobiologia. Núm. 849 (2022)

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