152 research outputs found
Influence of partial replacement of fish meal and fish oil with vegetable products on the growth and muscle cellularity of juvenile shi drum, Umbrina cirrosa
Seven-month-old shi drum (Umbrina cirrosa) specimens (mean weight 18.98 g, mean length 11.80 cm) were classified into
2 groups, a control group (C) fed a standard diet and a vegetal group (V) fed a diet with partial replacement of fish meal and fish oil by vegetable
products. The body and muscle parameters were studied on days 0, 27, and 62 of the experiment. On day 27, body length was similar in both
groups, but body weight was significantly lower in group V than in group C. The transverse area of the white muscle was also significantly
lower in V than in C. Hypertrophy was higher in C than in V, whereas hyperplasia was higher in V than in C. On day 62, the body parameters
showed similar results to those found on day 27. Muscle cellularity was different from that found on day 27, since hypertrophy was higher in
V than in C and hyperplasia was higher in C than in V. The feed conversion rate and specific growth rate were similar in both groups, but the
daily intake rate was lower in V than in C. Therefore, it seems that the percentage of vegetables in the vegetal feed was excessively high and
this caused less acceptance by the fish. The hepatosomatic, viscerosomatic, and intestinal length indices were similar in both groups. Survival
was nearly 100% in both groups.Verrugatos (Umbrina cirrosa) de 7 meses (peso medio de 18.98 g, longitud media de 11.80 cm) fueron clasificados en 2 grupos:
un grupo control (C), que fue alimentado con una dieta estándar, y un grupo vegetal (V), que fue alimentado con una dieta con reemplazo
parcial de harina y aceite de pescado por productos vegetales. Los parámetros corporales y musculares se estudiaron en los días 0, 27 y 62 del
experimento. En el día 27, la longitud corporal fue similar en ambos grupos, pero el peso fue significativamente menor en el grupo V que en el
C. El área transversa del músculo blanco fue significativamente menor en V que en C. La hipertrofia fue mayor en C que en V, mientras que la
hiperplasia fue mayor en V que en C. En el día 62, los parámetros corporales mostraron resultados similares a los encontrados en el día 27. La
celularidad muscular fue diferente a la encontrada en el día 27, de manera que la hipertrofia fue mayor en V que en C y la hiperplasia fue mayor
en C que en V. La tasa de conversión de alimento y la tasa específica de crecimiento fueron similares en ambos grupos, pero la tasa diaria de
alimentación fue menor en V que en C. Así, parece ser que el porcentaje de vegetales en la dieta vegetal fue excesivamente alto y ello causó
menor aceptación por los peces. Los índices hepatosomáticos, digestosómaticos e intestinales fueron similares en ambos grupos. La supervivencia
fue próxima al 100% en ambos grupos.Versión del editor0,45
Associations Between Urinary Tract Infections in Pregnant Women and Small for Gestational Age Infants
Lasting temperature effects on the muscle tissue, body growth and fillet texture of adult turbots, Scophthalmus maximus, L.
In the teleosts, several factors can influence the muscle growth patterns of fish by a modulation of the hypertrophy and hyperplasia. The temperature (T) is one of the most important environmental factors. Thus, the T history of fish influences on their potential growth, as it has been observed in Salmon, Salmo salar (Johnston et al., 2003) and other species. The T imprinting can influence on the muscle cellularity throughout the advanced stages of life due to the lasting T effects on myogenic cells precursors (MPC) (Steinbacher et al., 2011). In different teleost species, a correlation between texture and muscle fibre size has been demonstrated (Hatae et al., 1990). Hence, the thermal history can also influence in the flesh texture. In the present work we study the lasting T effects in adult turbots reared at different Ts during the early phases. This species reaches ≈ 1.5 kg at 18-20 months of age and the first sexual maturity takes place at ≈ 24 month
The influence of organic versus conventional feeding on the growth and survival of gilthead sea bream Sparus aurata L. juveniles
Sparus aurata specimens of 11 months of age (mean weight: 90.2 g, mean length: 18.3 cm) were classified
in two diet groups: one control group was fed with conventional diet, and one experimental group was fed with
an organic diet. The body and muscle parameters were studied at 0, 41 and 71 days of the experiment. The
results showed the highest values of body length and weight as well as the best biological feed conversion rates
in the organic group. The transverse area of white muscle, the hyperplasia and the muscle fibres density were
also higher in the organic than in the conventional group (P>0.05). In contrast, hypertrophy was greater in the
conventional than in the organic group (P<0.05). Survival was 100% in both groups. In conclusion, the organic
feeding regime was more favourable for growth than conventional feeding.Versión del edito
Long-term Effects of the Larval Photoperiod on the Subsequent Growth of Shi Drum Umbrina cirrosa L. Specimens and the Fillet Texture at Commercial Size
Three groups of shi drum Umbrina cirrosa L. were reared with different photoperiod regimes: 24L, 12L:12D and
16L:8D (natural photoperiod) during the larval period and then all of them were transferred to a natural photoperiod. At 11.8
and 20 months of age, the body growth and the muscle parameters reached the highest values in the 24L and 12L:12D groups.
The 16L:8D group showed the lowest growth. When comparing 24L with 12L:12D, the highest number of white fibres was
found in the 24L group, whereas the greatest fibres size was reached in the 12L:12D group.
Commercial size (28-30 cm; 290-340 g) was reached at 20 months of age in the 24L and 12L:12D groups, but at 23
months in the 16L:8D group. When comparing the three groups at the commercial stage, the larval photoperiod effect was still
observed, such that the highest fibres number was again found in the 24L group, whereas the greatest fibres size was reached
in the 12L:12D group. The highest values of textural hardness were observed in the 16L:8D and 24L groups. A nutritional
analysis was carried out in the 16L:8D group, which showed the following percentage values: 2.66, 21.2, 74.4, and 1.46 of fat,
protein, moisture and ash, respectively.0,591
Estudio anatómico y ecográfico de los nervios ciático y femoral en el perro para su aplicación en la anestesia regional de la extremidad posterior
Correlaciones existente entre tipos de fibras musculares, color y porcentaje de grasa intramuscular en cerdos de raza "chato murciano"
Mediante análisis de correlación se valora la influencia que los tipos de
fibras I, IIA y IIX pueden tener sobre el color y el porcentaje de grasa intramuscular en el músculo longísimo lumbar del cerdo “Chato Murciano”. Los resultados demuestran que las fibras tipo IIX influyen sobre el color de la carne y que no existen correlaciones entre el porcentaje de grasa intramuscular y ninguno de los tipos de fibras analizados
Evaluación de los tipos de fibras musculares en cerdos de raza chato murciano criados en sistema intensivo
Mediante técnicas histoquímicas y de análisis de imagen se estudian las
características de los distintos tipos de fibras que integran el músculo longísimo
lumbar del cerdo “Chato Murciano” criado mediante sistema intensivo.
Asimismo, se estima y valora la presencia de fibras anómalas. Los resultados
obtenidos demuestran la presencia de al menos tres tipos principales de
fibras, catalogadas como tipos I, IIA y IIX. Los datos morfométricos revelan
la existencia de alto porcentaje (79%) y gran tamaño de las fibras IIX (glucolíticas).
Un 50 % de los animales analizados presentó fibras gigantes aunque
en porcentajes muy escasos (<1%)
Efecto de la triploidia sobre los parámetros corporales y musculares del rodaballo (Scophthalmus maximus L.)
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