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Early morphological variation and induction of phenotypic plasticity in Patagonian pejerrey Neotropical Ichthyology
Crichigno,Sonia A.; Battini,Miguel A.; Cussac,Víctor E..
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 morphometrics and linear measurements. Our results showed that shape variation at hatching was related to the bending of the embryo head on the yolk sac, increasing the head-trunk angle due to progressive straightening of the embryo. The head-trunk...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atherinopsidae; Development; Feeding; Morphometry; Odontesthes hatcheri.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200009
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