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Author Benitez, S.; Duarte, C.; Opitz, T.; Lagos, N.A.; Pulgar, J.M.; Vargas, C.A.; Lardies, M.A.
Title Intertidal pool fish Girella laevifrons (Kyphosidae) shown strong physiological homeostasis but shy personality: The cost of living in hypercapnic habitats Type
Year 2017 Publication Marine Pollution Bulletin Abbreviated Journal Mar. Pollut. Bull.
Volume 118 Issue 1-2 Pages 57-63
Keywords Carbon dioxide; Hypercapnic conditions; Physiology; Behavior; Intertidal pool; Fish
Abstract Tide pools habitats are naturally exposed to a high degree of environmental variability. The consequences of living in these extreme habitats are not well established. In particular, little it is known about of the effects of hypercanic seawater (i.e. high pCO(2) levels) on marine vertebrates such as intertidal pool fish. The aim of this study was to evaluate the effects of increased pCO(2) on the physiology and behavior in juveniles of the intertidal pool fish Girella laevifrons. Two nominal pCO(2) concentrations (400 and 1600 patm) were used. We found that exposure to hypercapnic conditions did not affect oxygen consumption and absorption efficiency. However, the lateralization and boldness behavior was significantly disrupted in high pCO(2) conditions. In general, a predator-risk cost of boldness is assumed, thus the increased occurrence of shy personality in juvenile fishes may result in a change in the balance of this biological interaction, with significant ecological consequences. (C) 2017 Elsevier Ltd. All rights reserved.
Address [Benitez, S.; Lagos, N. A.] Univ Santo Tomos, Fac Ciencias, Ctr Invest & Innovat Cambia Climat CiiCC, Santiago, Chile, Email: cristian.duarte@unab.cl
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0025-326x ISBN Medium
Area Expedition Conference
Notes WOS:000402217300020 Approved
Call Number UAI @ eduardo.moreno @ Serial 737
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Author Gaitan-Espitia, J.D.; Bacigalupe, L.D.; Opitz, T.; Lagos, N.A.; Timmermann, T.; Lardies, M.A.
Title Geographic variation in thermal physiological performance of the intertidal crab Petrolisthes violaceus along a latitudinal gradient Type
Year 2014 Publication Journal Of Experimental Biology Abbreviated Journal J. Exp. Biol.
Volume 217 Issue 24 Pages 4379-4386
Keywords Reaction norm; Thermal sensitivity; Heart rate; Thermotolerance; Thermal safety margin; Latitudinal gradients
Abstract Environmental temperature has profound effects on the biological performance and biogeographical distribution of ectothermic species. Variation of this abiotic factor across geographic gradients is expected to produce physiological differentiation and local adaptation of natural populations depending on their thermal tolerances and physiological sensitivities. Here, we studied geographic variation in whole-organism thermal physiology of seven populations of the porcelain crab Petrolisthes violaceus across a latitudinal gradient of 3000 km, characterized by a cline of thermal conditions. Our study found that populations of P. violaceus show no differences in the limits of their thermal performance curves and demonstrate a negative correlation of their optimal temperatures with latitude. Additionally, our findings show that high-latitude populations of P. violaceus exhibit broader thermal tolerances, which is consistent with the climatic variability hypothesis. Interestingly, under a future scenario of warming oceans, the thermal safety margins of P. violaceus indicate that lower latitude populations can physiologically tolerate the ocean-warming scenarios projected by the IPCC for the end of the twenty-first century.
Address [Diego Gaitan-Espitia, Juan; Bacigalupe, Leonardo D.] Univ Austral Chile, Fac Ciencias, Inst Ciencias Ambientales & Evolut, Valdivia 5090000, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Company Of Biologists Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-0949 ISBN Medium
Area Expedition Conference
Notes WOS:000346420200019 Approved
Call Number UAI @ eduardo.moreno @ Serial 432
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Author Osores, S.J.A.; Ruz, G.A.; Opitz, T.; Lardies, M.A.
Title Discovering divergence in the thermal physiology of intertidal crabs along latitudinal gradients using an integrated approach with machine learning Type
Year 2018 Publication Journal Of Thermal Biology Abbreviated Journal J. Therm. Biol.
Volume 78 Issue Pages 140-150
Keywords
Abstract In intertidal marine crustaceans, phenotypic variation in physiological and life-history traits is pervasive along latitudinal dines. However, organisms have complex phenotypes, and their traits do not vary independently but rather interact differentially between them, effect that is caused by genetic and/or environmental forces. We evaluated the geographic variation in phenotypic integration of three marine crab species that inhabit different vertical thermal microhabitats of the intertidal zone. We studied seven populations of each species along a latitudinal gradient that spans more than 3000 km of the Chilean coast. Specifically we measured nine physiological traits that are highly related to thermal physiology. Of the nine traits, we selected four that contributed significantly to the observed geographical variation among populations; this variation was then evaluated using mixed linear models and an integrative approach employing machine learning. The results indicate that patterns of physiological variation depend on species vertical microhabitat, which may be subject to chronic or acute environmental variation. The species that inhabit the high- intertidal sites (i.e., exposed to chronic variation) better tolerated thermal stress compared with populations that inhabit the lower intertidal. While those in the low-intertidal only face conditions of acute thermal variation, using to a greater extent the plasticity to face these events. Our main results reflect that (1) species that inhabit the high-intertidal maintain a greater integration between their physiological traits and present lower plasticity than those that inhabit the low-intertidal. (2) Inverse relationship that exists between phenotypic plasticity and phenotypic integration of the physiological traits identified, which could help optimize energy resources. In general, the study of multiple physiological traits provides a more accurate picture of how the thermal traits of organisms vary along temperature gradients especially when exposed to conditions close to tolerance limits.
Address [Osores, Sebastian J. A.; Ruz, Gonzalo A.; Opitz, Tania] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0306-4565 ISBN Medium
Area Expedition Conference
Notes WOS:000454467700018 Approved
Call Number UAI @ eduardo.moreno @ Serial 966
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