2012
DOI: 10.1590/s1679-62252012005000007
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Early morphological variation and induction of phenotypic plasticity in Patagonian pejerrey

Abstract: The aim of this work was to study two aspects of phenotypic plasticity in the Patagonian pejerrey Odontesthes hatcheri (Teleostei: Atherinopsidae) the dependence of the early morphology on developmental time and temperature, and the induction of morphological changes by controlled feeding in juveniles. Newly hatched free embryos, incubated at two different temperatures (13 and 18ºC), and juveniles were used for the study and induction of phenotypic plasticity. Body and head shapes were analyzed with geometric … Show more

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Cited by 12 publications
(14 citation statements)
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“…Heat stress can influence phenotypic variation (Child et al 1940;Imasheva et al 1997;Royer et al 2009;Sisodia and Singh 2009;Hansen et al 2011;Crichigno et al 2012) and chaperones were suggested to canalize phenotypic development and, therefore, to act as capacitors of phenotypic variation (Rutherford and Lindquist 1998;Roberts and Feder 1999;Queitsch et al 2002;Rutherford 2003). Thus, it seems reasonable to hypothesize that they also participate in the regulation of phenotypic variation in natural populations of polymorphic land snails.…”
Section: Introductionmentioning
confidence: 99%
“…Heat stress can influence phenotypic variation (Child et al 1940;Imasheva et al 1997;Royer et al 2009;Sisodia and Singh 2009;Hansen et al 2011;Crichigno et al 2012) and chaperones were suggested to canalize phenotypic development and, therefore, to act as capacitors of phenotypic variation (Rutherford and Lindquist 1998;Roberts and Feder 1999;Queitsch et al 2002;Rutherford 2003). Thus, it seems reasonable to hypothesize that they also participate in the regulation of phenotypic variation in natural populations of polymorphic land snails.…”
Section: Introductionmentioning
confidence: 99%
“…Although both species fed extensively on Daphnia, O. hatcheri consumed more snails, and less terrestrial insects, whereas rainbow trout showed the opposite pattern. This difference could be the consequence of the stenophagous character of adult O. hatcheri (Crichigno et al, 2012), past competition leading to trophic and spatial segregation (i.e. less pelagic, more littoral-benthic habits for O. hatcheri), and/or the result of O. hatcheri abandoning the western side of the reservoir (sites MH and CL; Cussac et al, 2014 and present results) where coasts are forested and abundance of terrestrial insects (hemipterans of the exotic Pinus spp.)…”
Section: Discussionmentioning
confidence: 99%
“…In agreement with Aigo et al (2008), who positively relate abundance of O. hatcheri to the area of the lake, and the dependence of cephalic shape of O. hatcheri on coastline development (Crichigno et al, 2013), significant relationships between DFs and independent variables affecting quality and quantity of planktonic food availability (TP and altitude) were observed. Part of this variation could be ascribed to phenotypic plasticity (Crichigno et al, 2012).…”
Section: Discussionmentioning
confidence: 99%
“…Morphometric analyses can effectively discriminate between the species and their putative hybrids, in spite of the very small morphological differences, even when morphological variation includes the possible effects of genetic introgression, environmental dependence, and phenotypic plasticity (Crichigno et al, 2012).…”
Section: Discussionmentioning
confidence: 99%