Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801)
In the context of climate change, warming of the seas and expansion of hypoxic zones are challenges that most species of fish are, or will be subjected to. Understanding how different species cope with these changes in their environment at the individual level can shed light on how populations and e...
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ftdoajarticles:oai:doaj.org/article:3de0ad0ea5f54784b6f24c35b6c422c4 2023-05-15T17:41:39+02:00 Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) Juan Manuel Molina Andreas Kunzmann João Pena Reis Pedro Miguel Guerreiro 2023-02-01T00:00:00Z https://doi.org/10.3390/ani13040632 https://doaj.org/article/3de0ad0ea5f54784b6f24c35b6c422c4 EN eng MDPI AG https://www.mdpi.com/2076-2615/13/4/632 https://doaj.org/toc/2076-2615 doi:10.3390/ani13040632 2076-2615 https://doaj.org/article/3de0ad0ea5f54784b6f24c35b6c422c4 Animals, Vol 13, Iss 632, p 632 (2023) fish physiology climate change hypoxia tolerance temperature tolerance metabolic rate aerobic scope Veterinary medicine SF600-1100 Zoology QL1-991 article 2023 ftdoajarticles https://doi.org/10.3390/ani13040632 2023-02-26T01:31:36Z In the context of climate change, warming of the seas and expansion of hypoxic zones are challenges that most species of fish are, or will be subjected to. Understanding how different species cope with these changes in their environment at the individual level can shed light on how populations and ecosystems will be affected. We provide first-time estimates on the metabolic rates, thermal, and oxygen-related limits for Halobatrachus didactylus , a coastal sedentary fish that lives in intertidal environments of the Northeast Atlantic. Using respirometry in different experimental designs, we found that this species is highly resistant to acute thermal stress (CT max : 34.82 ± 0.66 °C) and acute hypoxia (P crit : 0.59–1.97 mg O 2 L −1 ). We found size-specific differences in this stress response, with smaller individuals being more sensitive. We also quantified its aerobic scope and daily activity patterns, finding this fish to be extremely sedentary, with one of the lowest standard metabolic rates found in temperate fish (SMR: 14.96 mg O 2 kg −1 h −1 ). H. didactylus activity increases at night, when its metabolic rate increases drastically (RMR: 36.01 mg O 2 kg −1 h −1 ). The maximum metabolic rate of H. didactylus was estimated to be 67.31 mg O 2 kg −1 h −1 , producing an aerobic scope of 52.35 mg O 2 kg −1 h −1 (77.8% increase). The metrics obtained in this study prove that H. didactylus is remarkably resilient to acute environmental variations in temperature and oxygen content, which might enable it to adapt to the extreme abiotic conditions forecasted for the world’s oceans in the near future. Article in Journal/Newspaper Northeast Atlantic Directory of Open Access Journals: DOAJ Articles Animals 13 4 632 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
fish physiology climate change hypoxia tolerance temperature tolerance metabolic rate aerobic scope Veterinary medicine SF600-1100 Zoology QL1-991 |
spellingShingle |
fish physiology climate change hypoxia tolerance temperature tolerance metabolic rate aerobic scope Veterinary medicine SF600-1100 Zoology QL1-991 Juan Manuel Molina Andreas Kunzmann João Pena Reis Pedro Miguel Guerreiro Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
topic_facet |
fish physiology climate change hypoxia tolerance temperature tolerance metabolic rate aerobic scope Veterinary medicine SF600-1100 Zoology QL1-991 |
description |
In the context of climate change, warming of the seas and expansion of hypoxic zones are challenges that most species of fish are, or will be subjected to. Understanding how different species cope with these changes in their environment at the individual level can shed light on how populations and ecosystems will be affected. We provide first-time estimates on the metabolic rates, thermal, and oxygen-related limits for Halobatrachus didactylus , a coastal sedentary fish that lives in intertidal environments of the Northeast Atlantic. Using respirometry in different experimental designs, we found that this species is highly resistant to acute thermal stress (CT max : 34.82 ± 0.66 °C) and acute hypoxia (P crit : 0.59–1.97 mg O 2 L −1 ). We found size-specific differences in this stress response, with smaller individuals being more sensitive. We also quantified its aerobic scope and daily activity patterns, finding this fish to be extremely sedentary, with one of the lowest standard metabolic rates found in temperate fish (SMR: 14.96 mg O 2 kg −1 h −1 ). H. didactylus activity increases at night, when its metabolic rate increases drastically (RMR: 36.01 mg O 2 kg −1 h −1 ). The maximum metabolic rate of H. didactylus was estimated to be 67.31 mg O 2 kg −1 h −1 , producing an aerobic scope of 52.35 mg O 2 kg −1 h −1 (77.8% increase). The metrics obtained in this study prove that H. didactylus is remarkably resilient to acute environmental variations in temperature and oxygen content, which might enable it to adapt to the extreme abiotic conditions forecasted for the world’s oceans in the near future. |
format |
Article in Journal/Newspaper |
author |
Juan Manuel Molina Andreas Kunzmann João Pena Reis Pedro Miguel Guerreiro |
author_facet |
Juan Manuel Molina Andreas Kunzmann João Pena Reis Pedro Miguel Guerreiro |
author_sort |
Juan Manuel Molina |
title |
Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
title_short |
Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
title_full |
Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
title_fullStr |
Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
title_full_unstemmed |
Metabolic Responses and Resilience to Environmental Challenges in the Sedentary Batrachoid Halobatrachus didactylus (Bloch & Schneider, 1801) |
title_sort |
metabolic responses and resilience to environmental challenges in the sedentary batrachoid halobatrachus didactylus (bloch & schneider, 1801) |
publisher |
MDPI AG |
publishDate |
2023 |
url |
https://doi.org/10.3390/ani13040632 https://doaj.org/article/3de0ad0ea5f54784b6f24c35b6c422c4 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Animals, Vol 13, Iss 632, p 632 (2023) |
op_relation |
https://www.mdpi.com/2076-2615/13/4/632 https://doaj.org/toc/2076-2615 doi:10.3390/ani13040632 2076-2615 https://doaj.org/article/3de0ad0ea5f54784b6f24c35b6c422c4 |
op_doi |
https://doi.org/10.3390/ani13040632 |
container_title |
Animals |
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13 |
container_issue |
4 |
container_start_page |
632 |
_version_ |
1766143317733539840 |