#truss protocol

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MORPHOMETRIC COMPARISON OF CHARACIDAE FISH WHEN n < p | UTTAR PRADESH JOURNAL OF ZOOLOGY

External morphology has recently received a lot of attention, particularly in fish, when it comes to identifying hybrids. This paper compares morphological covarion patterns between specimens of Colossoma macropomum and the hybrid C. macropomum () x P. orinoquensis () using a LASSO model based on the truss protocol. In this analysis, 25 C. macropomum specimens and 20 hybrid C. macropomum () x P. orinoquensis () specimens were examined, respectively. Strauss and Bookstein (1982) used the "Truss protocol" or "trusses" form. The mean squared error of the LASSO model was reduced. Just seven covariates are present in the final model. The morphological covariation patterns between specimens of C. macropomum and the hybrid C. macropomum () x P. orinoquensis () were well matched by the LASSO model, allowing most of the specimens to be correctly classified. Covariates associated with hydrodynamic abilities and foraging revealed differences in the region of the head and the anterior part of the fish. Morphometry is the science of determining the shape of something. Please see the link :- https://mbimph.com/index.php/UPJOZ/article/view/1849

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ON A LOGISTIC MODEL FOR MORPHOLOGICAL COVARIATION PATTERNS BETWEEN Colossoma macropomum AND THE HYBRID Colossoma macropomum (♀) x Piaractus orinoquensis (♂) | UTTAR PRADESH JOURNAL OF ZOOLOGY

Currently, great importance has been given to the study of external morphology, especially in fish, when it is used as a means of identifying hybrids. This paper considers a multiple logistic regression model based on the truss protocol to compare morphological covariation patterns between specimens of C. macropomum and the hybrid C. macropomum (♀) x P. orinoquensis (♂). In this study, 25 specimens of C. macropomum and 20 specimens of the hybrid C. macropomum (♀) x P. orinoquensis (♂), respectively, were analyzed. The method "Truss protocol" or "trusses" was used. Multiple logistic regression model based on the morphological covariation patterns between the two species showed a good fit and allowed to correctly classify most of the specimens. Only two covariates were significant; eye diameter and fat fin base. Differences between the hybrid and its parent were observed in the head area and in the anterior part of the fish, which were associated with hydrodynamic abilities and with foraging. Please see the link :- https://mbimph.com/index.php/UPJOZ/article/view/1720