Seahorses under a changing ocean: the impact of warming and acidification on the behaviour and physiology of a poor-swimming bony-armoured fish

Faleiro, Filipa; Baptista, Miguel; Santos, Catarina; Aurélio, Maria; Pimentel, Marta S.; Pegado, Maria Rita; Paula, José Ricardo; Calado, Ricardo; Repolho, Tiago; Rosa, Rui

doi:10.1093/conphys/cov009

Cited by 38 publications

(32 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Emerging evidence suggests that the behaviour and physiology of fishes are sensitive to changes in simultaneous exposure to CO 2 and temperature. For example, there can be effects on predation rates and predator selectivity [23], directional changes in lateralization [24], foraging behaviour [25], activity rates [26], offspring quality [27] and aerobic scope [28], all of which can influence persistence of species into the future. However, the direction of reactions to multiple stressors is not always clear.…”

Section: Introductionmentioning

confidence: 99%

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish

et al. 2017

View full text Add to dashboard Cite

Ocean acidification and warming, driven by anthropogenic CO emissions, are considered to be among the greatest threats facing marine organisms. While each stressor in isolation has been studied extensively, there has been less focus on their combined effects, which could impact key ecological processes. We tested the independent and combined effects of short-term exposure to elevated CO and temperature on the predator-prey interactions of a common pair of coral reef fishes ( and its predator, ). We found that predator success increased following independent exposure to high temperature and elevated CO Overall, high temperature had an overwhelming effect on the escape behaviour of the prey compared with the combined exposure to elevated CO and high temperature or the independent effect of elevated CO Exposure to high temperatures led to an increase in attack and predation rates. By contrast, we observed little influence of elevated CO on the behaviour of the predator, suggesting that the attack behaviour of was robust to this environmental change. This is the first study to address how the kinematics and swimming performance at the basis of predator-prey interactions may change in response to concurrent exposure to elevated CO and high temperatures and represents an important step to forecasting the responses of interacting species to climate change.

show abstract

Section: Introductionmentioning

confidence: 99%

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Monitoring blood biochemistry is used to evaluate metabolic and nutritional status, and the intensity of responses to stress (Barcellos et al, ; Faleiro, ). Changes in plasma glucose (Glu) and triglyceride (TG) levels positively correlate with stressor magnitude and response intensity (Zhao et al, ).…”

Section: Serum Of Total Protein Plasma Glucose and Triglycerides Levmentioning

confidence: 99%

Physiological responses to swimming fatigue in juvenile largemouth bronze gudgeon Coreius guichenoti

Yuan

Huang

Cai

et al. 2018

Journal of Fish Biology

View full text Add to dashboard Cite

Stepped velocity tests were conducted on juvenile largemouth bronze gudgeon Coreius guichenoti in a swim tunnel respirometer, and oxygen consumption increased with swimming speed to fatigue and then decreased during recovery. Serum levels of total protein, glucose and triglycerides initially decreased, increased at fatigue and then decreased during recovery. Levels stabilized after 120 min, corresponding to the time necessary to recover from fatigue.

show abstract

“…), should be good candidates for in situ behavioural assessments using cameras. Most seahorse behavioural assessments have either been conducted ex situ (Mason-Jones & Lewis, 1996;Faleiro, Narciso & Vicente, 2008;Anderson et al, 2011;Faleiro et al, 2015), or in situ by a diver (Vincent & Sadler, 1995;Curtis & Vincent, 2005;Naud et al, 2009). The use of cameras in in situ seahorse behavioural studies are limited and include the use of a Remotely Operated Vehicle (ROV) to study H. denise at a depth of 102 m at Osprey reef, Australia (Nishikawa et al, 2011), and the use of cameras to assess the impact from flash photography on the movement, behaviour and site persistence of H. whitei in Port Stephens, Australia (Harasti & Gladstone, 2013).…”

Section: Introductionmentioning

confidence: 99%

Gaining insights into in situ behaviour of an endangered seahorse using action cameras

Claassens

Hodgson

2017

Journal of Zoology

View full text Add to dashboard Cite

Observation bias is an Achilles heel of behavioural research, particularly during underwater in situ assessments. The advent of small, affordable underwater action cameras has helped to overcome this problem and were used to investigate the behaviour of the endangered Knysna seahorse (Hippocampus capensis) within a South African residential marina estate during the austral summer. Four GoPro® cameras were deployed over three time periods, October to December 2015, December 2015 to January 2016 and January to March 2016, and at different times of the day (morning, midday, afternoon) to ascertain whether: (1) cameras can be used to investigate seahorse behaviour, (2) seahorse behaviour changes throughout the day, (3) behaviour can be used to assess the impact of an external stressor (boat noise) on H. capensis. Thirty‐six hours from a total of 161 h (23%) recorded contained seahorse footage. Seahorses were significantly more visible during the morning and spent >80% of their time hunting. Courting behaviour took place exclusively during the morning and aggression was noted between males only. Boat noise increased during the December holiday period and a significant decrease in seahorse visibility, time spent feeding, and courting events were noted during this time. This suggests that noise has an adverse impact on the behaviour of H. capensis. This study confirms the efficacy of using small action cameras in seahorse behavioural research.

show abstract

Seahorses under a changing ocean: the impact of warming and acidification on the behaviour and physiology of a poor-swimming bony-armoured fish

Cited by 38 publications

References 32 publications

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish

Physiological responses to swimming fatigue in juvenile largemouth bronze gudgeon Coreius guichenoti

Gaining insights into in situ behaviour of an endangered seahorse using action cameras

Contact Info

Product

Resources

About

Seahorses under a changing ocean: the impact of warming and acidification on the behaviour and physiology of a poor-swimming bony-armoured fish

Cited by 38 publications

References 32 publications

Warming has a greater effect than elevated CO2on predator–prey interactions in coral reef fish

Warming has a greater effect than elevated CO2on predator–prey interactions in coral reef fish

Physiological responses to swimming fatigue in juvenile largemouth bronze gudgeon Coreius guichenoti

Gaining insights into in situ behaviour of an endangered seahorse using action cameras

Contact Info

Product

Resources

About

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish

Warming has a greater effect than elevated CO₂on predator–prey interactions in coral reef fish