Papers by Cristian Correa
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Evolutionary Ecology Research, 2010
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Proceedings of the National Academy of Sciences of the United States of America, Jan 3, 2017
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Biological Invasions, Jan 31, 2023
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Behavioral Ecology and Sociobiology, Aug 10, 2004
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Journal of Biogeography, Mar 1, 2010
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Trends in Ecology and Evolution, Nov 1, 2022
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Revista Chilena de Historia Natural, Jun 1, 2003
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DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2003
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Coastal habitats in Chile are hypothesized to support a number of diadromous fishes. The objectiv... more Coastal habitats in Chile are hypothesized to support a number of diadromous fishes. The objective of this study was to document migratory life histories of native galaxiids and introduced salmonids from a wide latitudinal range in Chilean Patagonia (39-48°S). Otolith microchemistry data were analysed using a recursive partitioning approach to test for diadromy. Based on annular analysis of Sr:Ca ratios, a diadromous life history was detected for populations of native Aplochiton taeniatus , A. marinus , and Galaxias maculatus . Lifetime residency in freshwater was suggested for populations of A. zebra and G. platei . Among introduced salmonids, populations of Oncorhynchus tshawytscha and O. kisutch exhibited anadromous migratory patterns, whereas the population of O. mykiss screened appeared restricted to freshwater. Salmo trutta exhibited variable habitat use consistent with establishment of an ocean-type life history in some populations. The capacity and geographic scope of hydrop...
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Cities are uniquely complex systems regulated by interactions and feedbacks between nature and hu... more Cities are uniquely complex systems regulated by interactions and feedbacks between nature and human society. Characteristics of human society- including culture, economics, technology and politics- underlie social patterns and activity, creating a heterogeneous environment that can influence and be influenced by both ecological and evolutionary processes. Increasing research on urban ecology and evolutionary biology has coincided with growing interest in eco- evolutionary dynamics, which encompasses the interactions and reciprocal feedbacks between evolution and ecology. Research on both urban evolutionary biology and eco- evolutionary dynamics frequently focuses on contemporary evolution of species that have potentially substantial ecological- and even social- significance. Still, little work fully integrates urban evolutionary biology and eco- evolutionary dynamics, and rarely do researchers in either of these fields fully consider the role of human social patterns and processes....
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Invasive species have become widespread in aquatic environments throughout the world, yet there a... more Invasive species have become widespread in aquatic environments throughout the world, yet there are few studies that have examined genomic variation of multiple introduced species in newly colonized environments. In this study, we contrast genomic variation in two salmonid species (anadromous Chinook Salmon, Oncorhynchus tshawytscha, 11,579 SNPs and resident Brook Charr Salvelinus fontinalis, 13,522 SNPs) with differing invasion success after introduction to new environments in South America relative to populations from their native range in North America. Estimates of genetic diversity were not significantly different between introduced and source populations for either species, indicative of propagule pressure that has been shown to maintain diversity in founding populations relative to their native range. Introduced populations also demonstrated higher connectivity and gene flow than those in their native range. Evidence for candidate loci under divergent selection was observed, but was limited to specific introduced populations and was not widely evident. Patterns of genomic variation were consistent with general dispersal potential of each species and therefore also the notion that life history variation may contribute to both invasion success and subsequent genetic structure of these two salmonids in Patagonia
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ABSTRACT We document the invasion of Chinook salmon (Oncorhynchus tshawytscha) to southern South ... more ABSTRACT We document the invasion of Chinook salmon (Oncorhynchus tshawytscha) to southern South America providing historical, current and future perspectives. We conducted field sampling, angler surveys, and analyzed all written records, and found evidence of reproductive populations in more than ten Andean (and many more coastal) watersheds draining mainly to the Pacific Ocean in Chile (39°–53°S), but also to the Atlantic Ocean in Argentina (50°S). Invasion begun ∼25years ago apparently from a few point sources of introduction by ocean ranching operations using spring-run Chinook salmon originated from tributaries of the lower Columbia River, USA. The rapid spread suggests that Chinook salmon were pre-adapted to their novel marine and freshwater environments because of similarities to equivalent North Pacific habitats, and invasion may have been facilitated by low ecological resistance. Preliminary data suggest that populations express a latitudinal gradient in juvenile migration life histories equivalent to that in their native range. Parallels to the only other establishment of anadromous Chinook salmon outside their native range, New Zealand, suggests a predictable invasion rate. In South America, the invasion is ongoing in southern areas, yet we deem unlikely colonization of rivers north of the range reached thus far. This is the first anadromous salmon species to have invaded such a large range in South America, and it raises many evolutionary, ecological, environmental and socioeconomic issues, with several discussed here.
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Human activity is causing rapid changes in the pheno-typic traits of wild populations. Such trait... more Human activity is causing rapid changes in the pheno-typic traits of wild populations. Such trait changes occur via phenotypic plasticity and contemporary evolution (i.e., evolution occurring over less than a few hundred
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Trends in Ecology & Evolution
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<p>Each leaf of the tree is labeled with individual ID-code (this study; n = 60 sequences),... more <p>Each leaf of the tree is labeled with individual ID-code (this study; n = 60 sequences), haplotype accession number, or outgroup species name (refer to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0071577#pone-0071577-t004" target="_blank">Table 4</a>). Branch support is indicated nearby nodes for inferences based on maximum likelihood (ML, bootstrap), Bayesian Inference (BI, posterior probability), and parsimony (P, bootstrap) (i.e. ML/BI/P); values <0.50 not shown. <i>Cytochrome Oxidase I</i> haplotype (<i>COI</i>-HT) correspond to those in Vanhaecke <i>et al. </i><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0071577#pone.0071577-Vanhaecke1" target="_blank">[7]</a> when matching, or to the new haplotypes described here. The first letters of <i>COI</i>-HT stand for haplogroups that were associated with species: A (associated with AZ), B (AT), and C (AM). Additional data are shown with an alternating shaded background to aid the visual separation of each sampling site listed as ''Site'' on the second column (unavailable for sequences downloaded from Genbank). Std. Length is standard length in cm. Stomach displays either the bulbous (□) or elongated (▪) shape. HD ratio is head length to head depth ratio (%), with head depth measured posterior to eye orbit (dashed line corresponds to that in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0071577#pone-0071577-g003" target="_blank">Figure 3</a>-A, for reference). Pattern refers to skin color patterns; dark chevron blotches (▴), dark spots (•) and unclear/no pattern (○). Morph corresponds to morphological identification; letters are initials of the second word (species) in binomial names. Morphological identification was accomplished by reference to Stomach and Pattern (M), or by jackknife identification using linear discriminant analysis based on all five characters analyzed (T and Z; method indicated by *). Note several discrepancies between morphological and barcoding identifications. Some fish photos further illustrate <i>Aplochiton</i> phenotypic diversity (IDs correspond tree leaf labels).</p
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Papers by Cristian Correa