Latitude or biogeographic breaks? Determinants of phenotypic (co)variation in fitness-related traits in Betaeus truncatus along the Chilean coast

Barria, Aura M.; Lardies, Marco A.; Beckerman, Andrew P.; Bacigalupe, Leonardo D.

doi:10.1007/s00227-013-2319-0

Cited by 11 publications

(8 citation statements)

References 43 publications

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“…Considering that the northeast Atlantic system, the Canary Islands, and the region of the Iberian Peninsula form two quite distinct subsystems (Dias, 2015), their separation is not only geographic but also a result of the unique oceanographic features of the northeast Atlantic region; the discontinuity of currents imposed by the flow of the Mediterranean Sea through the Strait of Gibraltar to the Gulf of Cadiz (Dias, 2015). These subsystems may be seen as biogeographic breaks that often result in abrupt changes in phenotypic traits among resident populations (Barria et al, 2014). This separation may explain our results that show low levels of population mixture between the Canary Islands and Peniche.…”

Section: Discriminant Functionsupporting

confidence: 59%

“…Consequently, phenotypic and genetic variation among fish within a species can occur as a result of isolation, and such variation can be seen as a basis for separation of fish into groups that can be managed as distinct populations (Turan, 2004). However, areal differentiation within a species may also arise from other factors, such as 1) countergradient variation when environmental influences reinforce the genetic differences between populations (Yamahira and Conover, 2002;Barria et al, 2014), 2) thermal reaction Yamahira and Takeshi, 2008), and 3) local adaptation and adaptive phenotypic plasticity (Yampolsky et al, 2014).…”

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confidence: 99%

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Identifying populations of the blue jack mackerel (Trachurus picturatus) in the Northeast Atlantic by using geometric morphometrics and otolith shape analysis

Vasconcelos¹,

Vieira²,

Sequeira³

et al. 2017

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Abstract-The population structure of the blue jack mackerel (Trachurus picturatus, Osteichthyes, Carangidae), in the northeast Atlantic is still unknown. To identify any distinct population units, three areas were selected: waters off Madeira, Peniche (mainland Portugal), and the Canary Islands. Knowledge of population structure is an aspect of the population dynamics of a species that is essential to effectively assess the existence of stocks and manage fisheries. In this study, geometric morphometrics and otolith shape analysis were successfully applied for population identification. Multivariate analysis of variance (MANOVA) revealed no body shape differences between males and females in each area studied, and therefore the sexes were combined for the analysis. The results of the discriminant analysis showed that a low misclassification occurred among areas; 78.0% of individuals were correctly classified. MANOVA performed on the otolith normalized elliptic Fourier descriptors revealed significant areal differences, but no difference between sexes. An overall classification success of 73.3% in the canonical discriminant analysis was achieved. These results indicate the usefulness of both otolith and body shape analysis for differentiation of blue jack mackerel stocks from the northeast Atlantic and indicate the existence of at least three distinguishable populations of this species.

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Section: Discriminant Functionsupporting

confidence: 59%

mentioning

confidence: 99%

Identifying populations of the blue jack mackerel (Trachurus picturatus) in the Northeast Atlantic by using geometric morphometrics and otolith shape analysis

Vasconcelos¹,

Vieira²,

Sequeira³

et al. 2017

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“…These geographic breaks are in accordance with the thermal breaks that we found at 30°S and 40°S for all of the variables related to SST (mean, maximun, minimum and coefficient of variation). Some authors have shown that these environmental discontinuities influence the temporal and spatial dynamics of benthic and pelagic communities (Rivadeneira et al, 2002;Thiel et al, 2007), the species composition (Meneses and Santelices, 2000), the larval dispersal and gene flow of many marine species (Brante et al, 2012;Haye et al, 2014;Sánchez et al, 2011;Thiel et al, 2007) and the phenotypic (co)variation of fitness-related traits (Barria et al, 2014).…”

Section: Latitudinal Variation In Habitat Thermal Conditionsmentioning

confidence: 99%

Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Gaitán‐Espitía

Bacigalupe

Opitz

et al. 2014

Journal of Experimental Biology

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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.

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“…This could be related to larval dispersal times of approximately 3 months in Central Chile (Wehrtmann and López, 2003; M. A. Lardies, unpublished observations/data). Also, it has been reported that the influence of biogeographic breaks on phenotypic variation is greater for species with shorter larval stages (Sánchez et al, 2011;Tellier et al, 2009;Zakas et al, 2009) in contrast with species with prolonged larval stages (Barria et al, 2014;Cárdenas et al, 2009;Macaya and Zuccarello, 2010). Also, the lack of a clear latitudinal pattern in the metabolism of B. emarginatus could be reflecting that the thermal stress that intertidal organisms experience does not increase as a simple function of decreasing latitude (Helmuth et al, 2002(Helmuth et al, , 2006.…”

Section: Discussionmentioning

confidence: 99%

Thermal physiological traits and plasticity of metabolism are sensitive to biogeographic breaks in a rock-pool marine shrimp

Barria

Bacigalupe

Lagos

et al. 2018

Journal of Experimental Biology

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Populations of broadly distributed species commonly exhibit latitudinal variation in thermal tolerance and physiological plasticity. This variation can be interrupted when biogeographic breaks occur across the range of a species, which are known to affect patterns of community structure, abundance and recruitment dynamics. Coastal biogeographic breaks often impose abrupt changes in environmental characteristics driven by oceanographic processes and can affect the physiological responses of populations inhabiting these areas. Here, we examined thermal limits, performances for heart rate and plasticity in metabolic rate of the intertidal shrimp from seven populations along its latitudinal range (∼3000 km). The distribution of this species encompass two breaks along the southeastern Pacific coast of Chile: the northern break is characterized by sharp discontinuities in upwelling regimes, and the southern break constitutes a major discontinuity in water conditions (temperature, pH, dissolved oxygen and nutrients), coastline topography and divergence of main oceanographic currents. For, we found higher plasticity in metabolism at the sites sampled at the biogeographic breaks, and at the site subjected to seasonal upwelling. The variation in metabolic rate was not consistent with increasing latitude and it was not affected by breaks. The lower and upper thermal limits were lower in populations around breaks, although the optimum temperature decreased towards higher latitudes. Overall, whereas thermal limits and plasticity of metabolism are related to biogeographic breaks, metabolic rate is not related to increasing latitude or the presence of breaks in the sampled range.

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Latitude or biogeographic breaks? Determinants of phenotypic (co)variation in fitness-related traits in Betaeus truncatus along the Chilean coast

Cited by 11 publications

References 43 publications

Identifying populations of the blue jack mackerel (Trachurus picturatus) in the Northeast Atlantic by using geometric morphometrics and otolith shape analysis

Identifying populations of the blue jack mackerel (Trachurus picturatus) in the Northeast Atlantic by using geometric morphometrics and otolith shape analysis

Geographic variation in thermal physiological performance of the intertidal crabPetrolisthes violaceusalong a latitudinal gradient

Thermal physiological traits and plasticity of metabolism are sensitive to biogeographic breaks in a rock-pool marine shrimp

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