Transcriptomic response in thermally challenged seahorses Hippocampus erectus: The effect of magnitude and rate of temperature change

Vecchio, Giulia Del; Galindo-Sánchez, Clara E.; Tripp-Valdez, Miguel A.; López-Landavery, Edgar A.; Rosas, Carlos; Mascaró, Maité

doi:10.1016/j.cbpb.2022.110771

Cited by 4 publications

(6 citation statements)

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“…It has been previously suggested that a gradual increase in temperature might favour the activation of biochemical and molecular mechanisms that deter cellular damage (Terblanche et al, 2007). Del Vecchio et al (2022) found evidence that gradual thermal increments of the magnitude and rate reported herein elicited apoptotic processes involving caspase and suggested that prolonged exposure to even sublethal temperatures results in the accumulation of deleterious effects that may eventually terminate in cellular death.…”

Section: Discussionmentioning

confidence: 56%

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Thermoregulatory response in juvenile Hippocampus erectus: Effect of magnitude and rate of thermal increase on metabolism and antioxidative defence

Del Vecchio,

Rodríguez‐Fuentes,

Rosas

et al. 2024

Ecology and Evolution

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Behavioural, physiological and biochemical mechanisms constitute the adaptive capacities that allow marine ectotherms to explore the environment beyond their thermal optimal. Limitations to the efficiency of these mechanisms define the transition from moderate to severe thermal stress, and serve to characterise the thermoregulatory response in the zone of thermal tolerance. We selected a tropical population of Hippocampus erectus to describe the timing of the physiological and biochemical mechanisms in response to the following increments in water temperature: (i) 4°C abrupt (26–30°C in <5 min); (ii) 7°C abrupt (26–33°C); (iii) 4°C gradual (1°C every 3 h) and (iv) 7°C gradual (1.5°C every 3 h). The routine metabolic rate (Rrout) of juvenile H. erectus was measured immediately before and after 0.5, 12 and 28 h of being exposed to each thermal treatment. Samples of muscle and abdominal organs were taken to quantify indicators of aerobic and anaerobic metabolism and antioxidant enzymes and oxidative stress at each moment throughout exposure. Results showed a full thermoregulatory response within 0.5 h: Rrout increased in direct correspondence with both the magnitude and rate of thermal increase; peroxidised lipids rapidly accumulated before the antioxidant defence was activated and early lactate concentrations suggested an immediate, yet temporary, reduction in aerobic scope. After 12 h, Rrout had decreased in sea horses exposed to 30°C, but not to 33°C, where Rrout continued high until the end of trials. Within 28 h of thermal exposure, all metabolite and antioxidant defence indicators had been restored to control levels (26°C). These findings testify to the outstanding thermal plasticity of H. erectus and explain their adjustment to rapid fluctuations in ambient temperature. Such features, however, do not protect this tropical population from the deleterious effects of chronic exposure to temperatures that have been predicted for the future.

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Section: Discussionmentioning

confidence: 56%

“…Del Vecchio et al. ( 2022 ) found evidence that gradual thermal increments of the magnitude and rate reported herein elicited apoptotic processes involving caspase and suggested that prolonged exposure to even sublethal temperatures results in the accumulation of deleterious effects that may eventually terminate in cellular death.…”

Section: Discussionmentioning

confidence: 74%

Thermoregulatory response in juvenile Hippocampus erectus: Effect of magnitude and rate of thermal increase on metabolism and antioxidative defence

Del Vecchio,

Rodríguez‐Fuentes,

Rosas

et al. 2024

Ecology and Evolution

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“…Concurrent with this wide geographic range, the species can also experience a wide range of temperatures throughout the year (Planas et al, 2012), which will vary depending on the latitude. Temperatures in the South of the Iberian Peninsula can range from 10 to 28 °C (Ria Formosa lagoon, Curtis and Vincent, 2006), which clearly differs from temperatures experienced in Northern France or the British Isles, where temperatures can range from 4 to 20°C (Garrick-Maidment et al, 2014). To date, two studies looked into the effects of prolonged exposure (1 month) to increasingly warmer water conditions (18°C -26°C -30°C) on H. guttulatus (Aureĺio et al, 2013;Faleiro et al, 2015).…”

mentioning

confidence: 99%

“…Authors found evidence of persistently higher basal metabolic rate at 30°C, higher stress response on gene expression, and higher mortality rates. Further, a transcriptomic analysis suggests an arrest of muscle development processes, activation of heat shock proteins, and a switch to anaerobic metabolism from the first moments of exposure to high temperatures (30 or 33 °C) (del Vecchio et al, 2022).…”

mentioning

confidence: 99%

“…National legislation has recently included syngnathids under Decree-Law n°38/2021, which approves the legal regime applicable to the protection and conservation of wild flora and fauna and natural habitats of the species listed in the Berne and Bonn Conventions (https://dre.pt/dre/detalhe/decreto-lei/38-2021-164258742). The most extensively studied population in Portugal is the Ria Formosa lagoon's population, where several studies have taken place to assess population status, identify major threats and apply mitigation measures to support its conservation (Curtis and Vincent, 2006;Caldwell and Vincent, 2012;Correia et al, 2013;Correia et al, 2015;Correia et al, 2018;Correia, 2022). However, there are newly recorded seahorse populations, such as in the Sado and Tagus estuaries which are understudied and in need of attention (unpublished data).…”

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confidence: 99%

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Performance of the long-snouted seahorse, Hippocampus guttulatus, under warming conditions

Costa¹,

Correia

Silva³

et al. 2023

Front. Mar. Sci.

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Temperature is a determinant cue for several behavioral, physiological, and metabolic processes in fish, which occur within a range set to optimize species fitness. Understanding how ocean warming will impact species, at individual and population levels, is, therefore, of utmost relevance for management and conservation purposes. This knowledge assumes particular relevance when it comes to species with unique life history traits that experience multiple threats, such as seahorses. This study aimed to assess the effects of warming on growth, feed intake, and behavioral patterns of the long-snouted seahorse, Hippocampus guttulatus. Fish were collected, before the breeding season, in the Sado estuary, Portugal, and subsequently exposed for an 8-week period to three different temperatures: 17°C, 20°C, and 24°C. Three times a week, behavioral observations were performed. Feed intake was measured every day and individuals were weighed once a week. Results indicate differences in behavioral responses of seahorses exposed to increasingly warming conditions. Under extreme temperature conditions (24°C), fish were more active, and fed more, but this increment of energy through feeding did not translate into increased growth in weight. Altogether, these results indicate that Sado’s population of H. guttulatus may become under thermal stress when exposed, for a long term, to warming conditions that are expected to occur by the end of the century.

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A modified seahorse optimization algorithm based on chaotic maps for solving global optimization and engineering problems

Özbay

2023

Engineering Science and Technology, an International Journal

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Transcriptomic response in thermally challenged seahorses Hippocampus erectus: The effect of magnitude and rate of temperature change

Cited by 4 publications

References 87 publications

Thermoregulatory response in juvenile Hippocampus erectus: Effect of magnitude and rate of thermal increase on metabolism and antioxidative defence

Thermoregulatory response in juvenile Hippocampus erectus: Effect of magnitude and rate of thermal increase on metabolism and antioxidative defence

Performance of the long-snouted seahorse, Hippocampus guttulatus, under warming conditions

A modified seahorse optimization algorithm based on chaotic maps for solving global optimization and engineering problems

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