La Razza bovina sarda: 2. le caratteristiche dell'allevamento

The Authors report on the results of a study concerning the Sardinian cattle; they have surveyed the demographic (geographic distribution, lifetime parameters, size and composition of herds), technical (management systems, reproductive techniques, calf raising, cow feeding) and economical (gross saleable production, net product, net income, production cost of calves) characteristics. These results were obtained with 35 herds from 2 Sardinian typical areas (Italy)

La Razza bovina sarda: 1. le caratteristiche morfologiche e biologiche

The Authors report on the results of a study concerning the Sardinian cattle; they have surveyed the morphological (body measurements and somatic indexes) and biological (blood groups and ematic polymorphisms) characteristics. These results were obtained with cows of 20 herds from 2 Sardinian typical areas (ltaly)

La Razza bovina modicana della Sardegna: 1. le caratteristiche morfologiche e biologiche

The Authors report on the results of a study concerning the modicano cattle of Sardinia; they have surveyd the morphological (body measurements and somatic indexes) and biological (blood groups and ematic polymorphisms) characteristics. These results were obtained with cows of 20 herds from 2 Sardinian typical areas (Italy)

Haplotype Affinities Resolve a Major Component of Goat (Capra hircus) MtDNA D-Loop Diversity and Reveal Specific Features of the Sardinian Stock

Goat mtDNA haplogroup A is a poorly resolved lineage absorbing most of the overall diversity and is found in locations as distant as Eastern Asia and Southern Africa. Its phylogenetic dissection would cast light on an important portion of the spread of goat breeding. The aims of this work were 1) to provide an operational definition of meaningful mtDNA units within haplogroup A, 2) to investigate the mechanisms underlying the maintenance of diversity by considering the modes of selection operated by breeders and 3) to identify the peculiarities of Sardinian mtDNA types. We sequenced the mtDNA D-loop in a large sample of animals (1,591) which represents a non-trivial quota of the entire goat population of Sardinia. We found that Sardinia mirrors a large quota of mtDNA diversity of Western Eurasia in the number of variable sites, their mutational pattern and allele frequency. By using Bayesian analysis, a distance-based tree and a network analysis, we recognized demographically coherent groups of sequences identified by particular subsets of the variable positions. The results showed that this assignment system could be reproduced in other studies, capturing the greatest part of haplotype diversity

Spatial and temporal facies evolution of a Lower Jurassic carbonate platform, NW Tethyan margin (Mallorca, Spain)

The variety of depositional facies of a Lower Jurassic carbonate platform has been investigated on the island of Mallorca along a transect comprising six stratigraphic profiles. Twenty-nine facies and sub-facies have been recognized, grouped into seven facies associations, ranging in depositional environment from supratidal/terrestrial and peritidal to outer platform. Spatial and temporal (2D) facies distribution along the transect reflects the evolution of the carbonate platform with time showing different facies associations, from a broad peritidal platform (stage 1) to a muddy open platform (stage 2), and finally to a peritidal to outer carbonate platform (stage 3). Stage 1 (early Sinemurian to earliest late Sinemurian) corresponds to a nearly-flat peritidal-shallow subtidal epicontinental platform with facies belts that shifted far and fast over the whole study area. The evolution from stage 1 to stage 2 (late Sinemurian) represents a rapid flooding of the epicontinental shallow platform, with more open-marine conditions, and the onset of differential subsidence. During stage 3 (latest Sinemurian), peritidal and shallow-platform environments preferentially developed to the northeast (Llevant Mountains domain) with a rapid transition to middle-outer platform environments toward the northwest (Tramuntana Range domain). Stages 1 and 3 present facies associations typical of Bahamian-type carbonates, whereas stage 2 represents the demise of the Bahamian-type carbonate factory and proliferation of muddy substrates with suspension-feeders. The described platform evolution responded to the interplay between the initial extensional tectonic phases related to Early Jurassic Tethyan rifting, contemporaneous environmental perturbations, and progressive platform flooding related to the Late Triassic–Early Jurassic worldwide marine transgression and associated accommodation changes

Prova preliminare di produzione di carne con puledri di asino

Su 9 puledri asinini sardi (4 maschi e 5 femmine), sottoposti a ingrassamento con paglia e concentrato per 4 mesi, sono stati effettuati i rilievi alla macellazione e lo spolpo completo della mezzena sinistra; su 6 (3 maschi e 3 femmine) sono state valutate le caratteristiche reologiche delle carni (durezza, coesione, resilienza elastica, adesione, masticabilità, acqua liberata totale). La resa in carcassa sul peso vivo stallato è risultata del 56,47%, quella del quinto quarto del 33,42%, l'incidenza del contenuto dell'apparato digerente del 10,11%; la resa in carcassa sul peso netto è stata del 62,83% e quella delle singole parti del quinto quarto è stata del 6,23% per la testa, del 9,71% per la pelle, del 2,66% per le parti distali degli arti, del 2,57% per la corata, dell'1,66% per il fegato e dello 0,43% per la milza. La carcassa è risultata composta per il 62,57% da muscolo, per il 15,58% da grasso separabile e per il 21,85% da ossa + tendini; la sua lunghezza è stata di cm 89, la lunghezza e la larghezza della coscia di cm 55 e 14 rispettivamente. Per quanto riguarda le caratteristiche reologiche delle carni, il sesso si è rivelato una importante fonte di variazione soprattutto per la durezza e per l'acqua liberata, il tipo di muscolo per tutte le caratteristiche considerate, a eccezione della resilienza elastica. Le femmine hanno fornito mediamente una carne piú tenera, piú masticabile e con un maggior potere di ritenzione idrica; il muscolo qualitativamente migliore è risultato lo psoas major, quello peggiore il vastus lateralis