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Influence of feeding regime on fatty acid composition in young red-spotted grouper Epinephelus akaara 总被引：1，自引：0，他引：1
ABSTRACT: Young red-spotted grouper Epinephelus akaara with an average total length of 3.4 cm were divided into five groups in floating net-cages, and reared under satiated conditions with different feeding frequencies (0.5, 1, 2, 4 and 8 times per day) for 40 days. Total food intake increased with feeding frequency. Feeding four times per day resulted in the highest growth and food conversion efficiency. Total lipid accumulation in the muscle, liver and intraperitoneal fat body (IPF) increased with feeding frequency. Red-spotted grouper were found to contain a high proportion of docosahexaenoic acid (DHA) in the muscle. Fish fed 0.5 times per day were characterized as having a high proportion of DHA in triglycerides (TG) in muscle (80%), liver (69%) and IPF (18%). Increasing saturated fatty acids and a relative reduction of DHA were observed in the muscle TG as the feeding frequency increased. Frequent feeding accelerated the accumulation of eicosapentaenoic acid and saturated acids in the liver and IPF. Low saturated acids and a subsidiary proportional increase in DHA were the result of the low lipid reserves. A possible role for DHA and saturated acids are discussed with regard to lipid reserves. 相似文献
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Hayato AMAIKE Motoki SASAKI Nao TSUZUKI Mitsunori KAYANO Motoharu OISHI Kazutaka YAMADA Hideki ENDO Tomoko ANEZAKI Naoya MATSUMOTO Rumiko NAKASHITA Misako KUROE Hajime TARU Gen BANDO Yuko IKETANI Ryohei NAKAMURA Nobutaka SATO Daisuke FUKUI Nobuo KITAMURA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(8):1284
In several primates and carnivores, pronation/supination angles of the forearm skeleton were examined, and it is thought that a larger angle is useful to acquire dexterous behaviors in feeding and/or life style, including climbing. In this study, the pronation/supination angles in Asiatic black, brown and polar bears were nondestructively examined. These specimens were classified as adult or non-adult. Three or four carcasses of each group of Asiatic black and brown bears were used for CT analysis, whereas only one adult polar bear was used. The forearms were positioned within the gantry of a CT scanner in both maximally supinated and pronated states. Extracted cross-sectional CT images of two positions were superimposed by overlapping the outlines of each ulna. The centroids of the radii were detected, and then the centroid of each radius and the midpoint of a line which connects between both ends of the surface of each radius facing the ulna, were connected by lines to measure the angle of rotation as an index of pronation/supination. In adult brown and polar bears, the angles were smaller as compared with the other groups (Asiatic black and non-adult brown bears). Asiatic black and non-adult brown bears can climb trees, whereas adult brown bears and polar bears cannot. This suggests that the pronation/supination angle is related to arboreal activity in Ursidae. 相似文献
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Mitsunori KAYANO Tomoko KATAOKA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1473-1478
Multiple logistic regression was applied to milk yield and composition data for 632
records of healthy cows and 61 records of ketotic cows in Hokkaido, Japan. The purpose was
to diagnose ketosis based on milk yield and composition, simultaneously. The cows were
divided into two groups: (1) multiparous, including 314 healthy cows and 45 ketotic cows
and (2) primiparous, including 318 healthy cows and 16 ketotic cows, since nutritional
status, milk yield and composition are affected by parity. Multiple logistic regression
was applied to these groups separately. For multiparous cows, milk yield (kg/day/cow) and
protein-to-fat (P/F) ratio in milk were significant factors (P<0.05)
for the diagnosis of ketosis. For primiparous cows, lactose content (%), solid not fat
(SNF) content (%) and milk urea nitrogen (MUN) content (mg/dl) were
significantly associated with ketosis (P<0.01). A diagnostic rule was
constructed for each group of cows: (1) 9.978 × P/F ratio + 0.085 × milk yield <10 and
(2) 2.327 × SNF − 2.703 × lactose + 0.225 × MUN <10. The sensitivity, specificity and
the area under the curve (AUC) of the diagnostic rules were (1) 0.800, 0.729 and 0.811;
(2) 0.813, 0.730 and 0.787, respectively. The P/F ratio, which is a widely used measure of
ketosis, provided the sensitivity, specificity and AUC values of (1) 0.711, 0.726 and
0.781; and (2) 0.678, 0.767 and 0.738, respectively. 相似文献
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Mitsuo ISHII Takahiro AOKI Kazuhiro YAMAKAWA Fumie MAGATA Chikara GOJO Katsumi ITO Mitsunori KAYANO Yasuo NAMBO 《Journal of Equine Science》2013,24(2):25-29
The aim of this study was to clarify the relationship between the placental retention
time (PRT) and the reproductive performance following mating at the foal heat in
Thoroughbreds. For this purpose, we interviewed 292 farmers over a period of 3 years with
questionnaires evaluating foaling, expulsion of placenta and reproductive performance at
the foal heat in 1,432 mares. The obtained data were later compared with a previous study
of heavy draft mares. The average of the PRT of the 1,432 Thoroughbred mares was 58 ± 88
min (mean ± SD). The mean PRT of Thoroughbreds was significantly shorter than that of
the148 min of heavy draft mares. The incidences of retained placenta (RP) occurring in the
Thoroughbred mares were 5.2 and 4.0%, for over 3 and 4 hr after foaling, respectively. The
incidence of RP over 4 hr was significantly lower than that of 25% in heavy draft mares.
The pregnancy rate at foal heat of the mares in which PRT was less than 3 hr was 37%, and
it significantly decreased to 11% for those with PRT of more than 3 hr. In the comparison
of the reproductive performance between Thoroughbred and heavy draft mares, the pregnancy
rate of Thoroughbreds dropped drastically to 10% when PRT exceeded 40, and in consequence,
the pregnancy rate of Thoroughbreds was significantly lower than the 30% of heavy draft
mares, which had a PRT of over 4 hr. In conclusion, the Thoroughbred mares had a low
incidence of RP, however, a PRT exceeding 3 hr severely affected the reproductive
performance at the foal heat. 相似文献
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