Temperature and acid–base balance in the American lobster<i>Homarus americanus</i>

Qadri, Syed Aman; Camacho, Joseph; Wang, Hongkun; Taylor, Janet; Grosell, Martin; Worden, Mary Kate

doi:10.1242/jeb.02709

Cited by 21 publications

(15 citation statements)

References 51 publications

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“…Temperature has been shown to be an important determinant of metabolism (Qadri et al . ), behaviour (Crossin et al . ) and several life history traits of this species (Lawton & Lavalli ).…”

Section: Introductionmentioning

confidence: 99%

Seascape genomics provides evidence for thermal adaptation and current‐mediated population structure in American lobster (Homarus americanus)

Benestan

Quinn

Maaroufi³

et al. 2016

Molecular Ecology

172

199

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Investigating how environmental features shape the genetic structure of populations is crucial for understanding how they are potentially adapted to their habitats, as well as for sound management. In this study, we assessed the relative importance of spatial distribution, ocean currents and sea surface temperature (SST) on patterns of putatively neutral and adaptive genetic variation among American lobster from 19 locations using population differentiation (PD) approaches combined with environmental association (EA) analyses. First, PD approaches (using bayescan, arlequin and outflank) found 28 outlier SNPs putatively under divergent selection and 9770 neutral SNPs in common. Redundancy analysis revealed that spatial distribution, ocean current-mediated larval connectivity and SST explained 31.7% of the neutral genetic differentiation, with ocean currents driving the majority of this relationship (21.0%). After removing the influence of spatial distribution, no SST were significant for putatively neutral genetic variation whereas minimum annual SST still had a significant impact and explained 8.1% of the putatively adaptive genetic variation. Second, EA analyses (using Pearson correlation tests, bayescenv and lfmm) jointly identified seven SNPs as candidates for thermal adaptation. Covariation at these SNPs was assessed with a spatial multivariate analysis that highlighted a significant temperature association, after accounting for the influence of spatial distribution. Among the 505 candidate SNPs detected by at least one of the three approaches, we discovered three polymorphisms located in genes previously shown to play a role in thermal adaptation. Our results have implications for the management of the American lobster and provide a foundation on which to predict how this species will cope with climate change.

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“…Temperature has been shown to be an important determinant of metabolism (Qadri et al . ), behaviour (Crossin et al . ) and several life history traits of this species (Lawton & Lavalli ).…”

Section: Introductionmentioning

confidence: 99%

Seascape genomics provides evidence for thermal adaptation and current‐mediated population structure in American lobster (Homarus americanus)

Benestan

Quinn

Maaroufi³

et al. 2016

Molecular Ecology

172

199

View full text Add to dashboard Cite

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“…Adult lobsters have a thermal preference of ≈16°C (range of 15-18°C), but responses to temperature can change on a seasonal basis because of acclimatization (Worden et al 2006;Qadri et al 2007). Crossin et al (1998) showed that in the summer lobsters avoided water temperatures above 18°C, which were >5°C warmer than the ambient temperature at that time of year.…”

Section: Introductionmentioning

confidence: 99%

Seasonal and sexual differences in the thermal preferences and movements of American lobsters

JurySteven

WatsonWinsor

2013

Can. J. Fish. Aquat. Sci.

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Thermal preferences of lobsters (Homarus americanus) were determined in the laboratory and compared with seasonal movements and distribution of lobsters in the Great Bay Estuary, New Hampshire. Lobsters preferred 11.0 ± 0.6°C, or 2.8 ± 0.7°C warmer than ambient temperature, during the colder months of the year. However, during the warmer months they selected 15.7 ± 0.4°C, which was 0.2 ± 0.4°C warmer than the ambient temperature. Overall, the lobsters tested had a final preferred temperature of 15.9°C, and males selected warmer temperatures than females. Catch per unit effort was highest at sites where temperatures were similar to the temperatures lobsters preferred in the laboratory studies and lowest at sites ≥18°C or <12°C. Significantly more males than females were captured in areas with temperatures >16°C. Lobsters tagged, and subsequently recaptured within 7-35 days, moved relatively little when released into areas where temperatures were similar to their preferred temperatures. Thermal preferences may influence the movement of lobsters in thermally heterogeneous habitats, and climate change is expected to have a major impact on lobster distribution, especially in estuarine and coastal habitats. Résumé :Les préférences du homard américain (Homarus americanus) en matière de température ont été établies en laboratoire et comparées aux déplacements et à la répartition des homards selon la saison dans l'estuaire de la Great Bay (New Hampshire, États-Unis). Les homards préféraient une température de 11,0 ± 0,6°C, soit 2,8 ± 0,7°C de plus que la température ambiante, durant les mois les plus froids de l'année, alors que durant les mois chauds, ils choisissaient une température de 15,7 ± 0,4°C, soit 0,2 ± 0,4°C de plus que la température ambiante. Dans l'ensemble, les homards étudiés présentaient une température de prédilection finale de 15,9°C et les mâles choisissaient des températures plus élevées que les femelles. Les prises par unité d'effort étaient les plus grandes dans les lieux où les températures étaient semblables aux températures préférées par les homards dans les études en laboratoire et les plus faibles dans les lieux où la température était ≥18°C ou <12°C. Dans les zones de température >16°C, le nombre de mâles capturés était significativement plus grand que celui de femelles capturées. Des homards marqués puis repris après une période de 7 à 35 jours s'étaient déplacés relativement peu s'ils avaient été relâchés dans des zones où la température était semblable à leur température de prédilection. Les préférences en matière de température pourraient avoir une incidence sur les déplacements des homards dans des habitats hétérogènes sur le plan thermique, et les changements climatiques devraient avoir un impact significatif sur la répartition des homards, particulièrement dans les habitats estuariens et côtiers. [Traduit par la Rédaction]

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“…Acute increases in temperature trigger metabolic acidosis of the hemolymph. Homeostatic mechanisms involve the strength and frequency of the heartbeat that are modulated by changes in pH [39]. These cardiac output variations increase the gill gas exchange efficiency for immersed organisms; respiration compensates for the temperature effect but is likely not to be effective in the case of emersed aquatic organisms where gill ventilation is impaired.…”

Section: Discussionmentioning

confidence: 99%

Synergistic and Antagonistic Effects of Thermal Shock, Air Exposure, and Fishing Capture on the Physiological Stress of Squilla mantis (Stomatopoda)

et al. 2014

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This study is aimed at assessing the effects of multiple stressors (thermal shock, fishing capture, and exposure to air) on the benthic stomatopod Squilla mantis, a burrowing crustacean quite widespread in the Mediterranean Sea. Laboratory analyses were carried out to explore the physiological impairment onset over time, based on emersion and thermal shocks, on farmed individuals. Parallel field-based studies were carried out to also investigate the role of fishing (i.e., otter trawling) in inducing physiological imbalance in different seasonal conditions. The dynamics of physiological recovery from physiological disruption were also studied. Physiological stress was assessed by analysing hemolymph metabolites (L-Lactate, D-glucose, ammonia, and H+), as well as glycogen concentration in muscle tissues. The experiments were carried out according to a factorial scheme considering the three factors (thermal shock, fishing capture, and exposure to air) at two fixed levels in order to explore possible synergistic, additive, or antagonistic effects among factors. Additive effects on physiological parameters were mainly detected when the three factors interacted together while synergistic effects were found as effect of the combination of two factors. This finding highlights that the physiological adaptive and maladaptive processes induced by the stressors result in a dynamic response that may encounter physiological limits when high stress levels are sustained. Thus, a further increase in the physiological parameters due to synergies cannot be reached. Moreover, when critical limits are encountered, mortality occurs and physiological parameters reflect the response of the last survivors. In the light of our mortality studies, thermal shock and exposure to air have the main effect on the survival of S. mantis only on trawled individuals, while lab-farmed individuals did not show any mortality during exposure to air until after 2 hours.

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Temperature and acid–base balance in the American lobsterHomarus americanus

Cited by 21 publications

References 51 publications

Seascape genomics provides evidence for thermal adaptation and current‐mediated population structure in American lobster (Homarus americanus)

Seascape genomics provides evidence for thermal adaptation and current‐mediated population structure in American lobster (Homarus americanus)

Seasonal and sexual differences in the thermal preferences and movements of American lobsters

Synergistic and Antagonistic Effects of Thermal Shock, Air Exposure, and Fishing Capture on the Physiological Stress of Squilla mantis (Stomatopoda)

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