Papers by Pere M. Parés-Casanova
Revista de investigaciones veterinarias del Perú, Feb 29, 2024
Revista de veterinaria y zootecnia amazónica, Mar 20, 2024
Este es un artículo de acceso abierto distribuido bajo los términos de la licencia de atribución ... more Este es un artículo de acceso abierto distribuido bajo los términos de la licencia de atribución de Creative Commons, que permite el uso sin restricciones, distribución y reproducción en cualquier medio, siempre que se cite debidamente la obra original.
Estudis d'història agrària/Estudis d'història agrària, Dec 9, 2023
Sustainability, Nov 24, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Revista de investigaciones veterinarias del Perú, Feb 29, 2024
Veterinary Sciences, Mar 28, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Revista de Investigaciones Veterinarias del Perú
La morfometría es una herramienta para cuantificar y analizar la variación morfológica en el tama... more La morfometría es una herramienta para cuantificar y analizar la variación morfológica en el tamaño y forma de los animales. El objetivo del estudio fue contribuir a la caracterización morfométrica del cerdo criollo araucano para conocer algunas de sus características funcionales y etnológicas. Se estudiaron 58 cerdos (27 hembras y 31 machos), con edades entre 4 a 48 meses, localizados en tres veredas de Arauca, oriente de Colombia. Se obtuvieron 11 medidas corporales individuales y se construyeron tres índices. Se aplicó estadística descriptiva y un análisis univariado para medir el efecto ambiental sobre las medidas corporales e índices, usando la edad como covariable. Los cerdos presentaron una variabilidad media en las medidas corporales asociada con una mediana armonía. Los cerdos se consideran dolicocéfalos, mesolíneos y no aptitud cárnica. Las hembras tendían a ser más grandes que los machos. La vereda fue el único efecto que influyó sobre la combinación lineal de las variabl...
Morphological integration and modularity are concepts that refer to the covariation level between... more Morphological integration and modularity are concepts that refer to the covariation level between the components of a structure. Species of the opossums, genus Didelphis, have been the object of several taxonomic and morphometric analyses but no study has so far analysed mandibular morphological integration and modularity at a species-level. The aim of this work was to check whether the body (corpus mandibulae, mandibular corpus) and the ramus (ramus mandibulae, ascending mandibular ramus) are separate modules in Didelphis pernigra using a two-dimensional geometric morphometric approach. For this purpose, a sample of hemimandibles from 36 D. pernigra (13 males and 23 females) was analysed using 17 landmarks in lateral view. The modularity hypothesis based on different developmental origins was tested, by using the RV coefficient. Later, the integration level was assessed applying a partial least-squares analysis (PLS). The underlying aim was to know whether the traditional division ...
World's Veterinary Journal
Body coloration of emydids can be triggered by different types of factors. Therefore, the current... more Body coloration of emydids can be triggered by different types of factors. Therefore, the current study aimed to investigate the changes in plastron color of Florida Red-bellied Turtle Pseudemys nelsoni (P. nelsoni Carr, 1938), an emydid of North America. In the current study, 15 (3 males and 12 females) fresh corpses of captive-reared adult specimens of P. nelsoni were analyzed using digital images as well as applying geometric morphometrics and color photo processing techniques. Plastron color had no relationship with size nor fluctuating asymmetry, which could be considered as a negative proxy for stress. Moreover, there were no significant differences between males and females in this regard. It can be suggested that reddish on plastron for P. nelsoni was highly related to feeding, compared to other external factors, such as age, size, or stress. In wild P. nelsoni populations, reddish plastral coloration was related to body size probably due to ontogenetic differences in the di...
roveda pub., 2022
Geometric techniques can be easily applied to many zoological problems, from recognizing subpopul... more Geometric techniques can be easily applied to many zoological problems, from recognizing subpopulations to studying sexual dimorphism. Pseudemys concinna (P. concinna) is a large terrapin species known as the Eastern River Cooter, native to North America. The hypothesis was to test if plastral pattern tends to fade with age. The present study applies geometric techniques to assess size in a sample of 20 fresh corpses of P. concinna (18 females and 2 males). Plastron color (red, blue, and green channels) was used to objectivize this fading pattern. A negative regression between size and color was registered, so the colour plastral intensity of P. concinna LeConte 1830 tends, effectively, to fade with age. Elucidating the cellular and chemical mediators and mechanisms of these slow color changes will likely require laboratory study.
Journal of Veterinary Physiology and Pathology
Geometric techniques can be easily applied to many zoological problems, from recognizing subpopul... more Geometric techniques can be easily applied to many zoological problems, from recognizing subpopulations to studying sexual dimorphism. Pseudemys concinna (P. concinna) is a large terrapin species known as the Eastern River Cooter, native to North America. The hypothesis was to test if plastral pattern tends to fade with age. The present study applies geometric techniques to assess size in a sample of 20 fresh corpses of P. concinna (18 females and 2 males). Plastron color (red, blue, and green channels) was used to objectivize this fading pattern. A negative regression between size and color was registered, so the colour plastral intensity of P. concinna LeConte 1830 tends, effectively, to fade with age. Elucidating the cellular and chemical mediators and mechanisms of these slow color changes will likely require laboratory study.
Journal of Veterinary Physiology and Pathology
Motor laterality has been often studied in non-human animals, including ungulates, and it has bee... more Motor laterality has been often studied in non-human animals, including ungulates, and it has been noted that adult animals tend to be ambidextrous. Therefore, the current study aimed to study the laterality of grazing posture when standing in a quadrupedal position. To this end, a total of 106 horses (24 foals, 8 yearlings, 14 subadults and 60 adults 53 females and 7 males) of Pyrenean horse from 11 grazing areas farms were observed and their forelimb preference when grazing was recorded (1-3 times for each animal). The obtained results revealed that approximately half of the horses were right-handed and half left-handed, and females were equally lateralized than males. Moreover, lateralization was not affected by age. Therefore, it seems that forelimb ambidexterity in Pyrenean horses is probably due to the lack of human contact. As the presentation of unevenness may be crucial to orthopaedic health and the compensatory mechanisms used by uneven footed horses are currently unknown,...
Applied Sciences
Morphological integration and modularity refer to the degree of covariation between the different... more Morphological integration and modularity refer to the degree of covariation between the different components of an anatomical structure. Modularity refers to structures that have components which covary strongly, but at the same time are relatively independent. Integration refers to the coordinated variation of the components of a functional anatomical structure. The hindlimb basipodium is a complex functional structure. The integration of its parts must arise from a coordinated development and functionality. Our objective in this study was to study the levels of integration of two modules on the calcaneum in domestic sheep. The calcaneum develops from two different centres. One gives rise to the body and its process while the other gives rise to the distal half of the bone. The hypothesis of modularity of two parts of the calcaneum was tested using the Escoufier RV coefficient and an analysis of two blocks of Partial Least Squares. These allowed us to evaluate the level of morpholo...
Few previous studies have explored caprine skulls using geometric morphometric (GM) methods, whic... more Few previous studies have explored caprine skulls using geometric morphometric (GM) methods, which enable the quantitative analysis and visualisation of shape changes in skeletal elements and provide an important compliment to traditional lineal analyses. The aim of this research is to determine whether GM techniques can provide insights into how the shape of the goat skull differs between horned and polled animals, focusing on the differences between the dorsal aspects of the neurocranium. Fourteen skulls (4 polled and 10 horned) skulls from adult goats belonging to different breeds were studied. From the obtained results, neither the size nor shape showed statistically significant differences between polled and horned skulls. As animal"s functional capabilities are influenced by the presence of horns (if horns must function as shock absorbers, protecting the brain from blows during intraspecific combat, it would seem that some differences in shape and/or size should be detect...
Anatomia, Histologia, Embryologia, 2019
It appears either when character development is delayed or through acceleration of sexual maturat... more It appears either when character development is delayed or through acceleration of sexual maturation (Leonova, 2015); paedomorphic animals require less growth to be developed as adult form (Geiger & Haussman, 2016; Skulachev et al., 2017). A large head and a round face, large eyes in relation to face size, bulging cheeks, small nose and mouth are some of the components of this effect, perceived as juvenile traits. Such juvenile characteristics are perceived as attractive to humans (Borgi & Cirulli, 2013; Waller et al., 2013). Among domestic mammals, it has been described in
Morphologie : bulletin de l'Association des anatomistes, 2018
To evaluate sexual-size dimorphism and attempt at categorization of inter-individual shapes of fo... more To evaluate sexual-size dimorphism and attempt at categorization of inter-individual shapes of foramen magnum outlines using Fourier descriptors which allow for shape outline evaluations with a resultant specimen character definition. Individual characterization and quantification of foramen magnum shapes in direct caudal view based on elliptical Fourier technique was applied to 46 tropical raccoon skulls (26 females, 20 males). Incremental number of harmonics demonstrates morphological contributions of such descriptors with their relations to specific anatomical constructions established. The initial harmonics (1st to 3rd) described the general foramen shapes while the second (4th to 12th) demonstrated fine morphological details. Sexual-size dimorphism was observed in females (87.1%) and 91.7% in males, normalization of size produces 75% in females and 83% in males. With respect to foramen magnum dimorphism analysis, the result obtained through elliptic Fourier analysis was compara...
New Insights into Morphometry Studies, 2017
There have been brilliant studies in the field of morphometry in recent years. This book increase... more There have been brilliant studies in the field of morphometry in recent years. This book increases the literature on this domain by presenting some recent advances and emerging applications upon biological structures, ranging in a variety of purposes and objectives: from animal visual system to growth models, from amphibians to humans, all in a comprehensive and accessible way of information. All chapters are written by leading internationally recognized experts from academia, who explain their own topics in plain English and in a totally rigorous manner. Suitable for a wide range of expert readers, this book represents a high valuable work for scientists and advanced students working in biological and medical morphometric topics
Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales, 2015
SummaryThe existence of sexual dimorphism in the Minorcan horse, an autochthonous breed from Mino... more SummaryThe existence of sexual dimorphism in the Minorcan horse, an autochthonous breed from Minorca Island in the Balearic archipelago (NW Mediterranean Sea), is established in the official standard, with females being shorter and longer than males as well as having slenderer necks and a squarer croup. However, no study so far has explored the size and shape components of this dimorphism separately. The aim of this study was to analyse the morphology of this breed using geometric morphometric methods in order to find size and shape differences between sire lines. The analysis was based on landmarks digitized in lateral view from 38 registered adult Minorcan horses (20 males and 18 females) within an age range of 3–14 years (average 7 years) with different performance goals. The analyses did not reveal any significant differences between the “shape” and “size” of male and female animals, for the landmarks studied, so the sexes are functionally similar.
A sample of 39 native ewes belonging to different flocks, from different local communities of the... more A sample of 39 native ewes belonging to different flocks, from different local communities of the Quetzaltenango Department in W Guatemala, were weighed and measured for thoracic girth, ear length, cannon perimeter, face length and head length. From this sample, 9 (23.0%) animals were microtic (ear length between 5 and 7 cm). Microtic ears presented a striking difference in size, and in all cases detected both outer ears were size-reduced and abnormally shaped. Anotia was not detected in any case. Principal Component Analysis allowed the clustering of both groups (microtic and “normal” eared animals), but differences were only based on ear length, the general conformation being similar for both. There is therefore no sense in culling microtic animals from breeding.
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Papers by Pere M. Parés-Casanova