Hidemi Kumai's research while affiliated with Kindai University and other places

... These results coincided well with the reported morphological development that body constitution and physiologiccal functions were basically accomplished immediately before and/or at the shift point from larvae to juveniles of the striped jack.10) Takii et al. 19,20) reported that both CP and ASH contents and ALP activity increased rapidly from the first feeding up to the morphological shift point to juveniles of the red sea bream, about 10 mm TL. It has already been suggested in mammals that ALP functions as an inorganic phosphate transfer of the matrix vesicle in relation to bone formation and that its activity was also detected in the intestine, liver, and kidney.21) ...

... A same basal diet with approximately 50% protein and 8% lipid, which were demonstrated to be suitable for both turbot and tiger puffer [22][23][24][25], was used for these two species. The basal diet (control) was made with a medium fishmeal level (30%, [26][27][28][29]) but no fish oil (Table 1). ...

... The active constituent in the amino acid fraction was identified as the fraction glycine, alanine, proline plus histidine whose activity was found to be comparable to that of the complete synthetic extract. A similar methodology was used by Takaoka et al. (1995) who studied feeding stimulants for the tiger puffer Takifugu rubripes testing synthetic extract of clam Tapes japonicus. The amino acid fraction showed remarkably higher feeding stimulant activity than those of nucleotide and other chemical fractions in the extract. ...

... The subsequent bioinformatics screening against torafugu genome illustrated the potential disconnection between torafugu FoxO1A and carbohydrate metabolism, where GLUT4 and PYG did not contain any DBEs in their upstream regions analyzed (within 500 nt). Since the expression of these genes is regulated by FoxO1 in mammals (Armoni et al., 2007;Karnieli and Armoni, 2008;Melnik, 2010;Süren-Castillo et al., 2014;Kinoshita et al., 2016), these results may be associated with the low carbohydrate requirement in torafuguthe optimal carbohydrate content of torafugu diet is about 20% (Takii et al., 1995), whereas rodent diets often contain more than 50% of carbohydrate (National Research Council, 1995). Further investigation on the FoxO1A and its target genes will shed new light on the long-standing challenge in aquaculture to increase the carbohydrate utilization efficiency of fish. ...

... Specifically, according to the total length, the greater amberjack reared in the P. inhibens-enriched water may have initiated the stage of metamorphosis earlier in comparison to the control group. The relative contribution of hyperplasia in the growth procedure decreases with standard fish length, as reported by Zimmerman and Lowery [87]. Therefore, the apparent decrease in p38 MAPK, p44/42 MAPK, and JNK activation may indicate that P. inhibens favored a more rapid growth, potentially leading greater amberjack to advanced development, where the hyperplastic-facilitated procedures were mostly completed. ...

... On the other hand, our recent observations in juvenile red sea bream (0.1 g) fed Artemia nauplii with different level of proteins showed that a portion of EI as M ranged from 30 to 35%, depending on the highly-unsaturated fatty acids (HUFA) composition of the nauplii used (Sumule et al., 2003). Moreover,Takii et al. (2000)reported that EI channeled to M is higher (55–58%) in higher salinity (32 psu) compared to that of lower salinity (58–63%, 25 psu). It is likely that the proportion of EI allocated for metabolism was affected by the size of fish, protein content of diet and environmental conditions (DeSilva and Anderson, 1995). ...

... Fish fed PF showed a decrease in survival after 8 days of the beginning of the feeding trial compared to those fed a formulated diet. According to Sawada et al. (2000) during hatchery production, PBT larvae are fed yolk-sac larvae such as spangled emperor fish Lethrinus nebulosus or Japanese parrotfish Calotomus japonicas until they reach 10 to 40 mm of total length. Then, they were supplied with minced sand lance Ammodytidae personatus from 40 mm total length onward. ...

... Due to the increasing demand from consumption, the tuna stocks are considered to be at risk of overexploitation, although it previously had been thought that tuna harvesting would never cause their populations to become threatened 20,23 . In response to the risk of over fishing, the aquaculture programme of the Pacific bluefin tuna started in 1970 in Japan, resulting in predominantly farm-raised fish by 2002 24,25 . Despite this innovative achievement, most tuna aquaculture business still depends on wild stocks of juveniles because the survival rates of larval and juvenile tuna from artificial reproduction is not high 26 . ...

... New Zealand Journal of Marine and Freshwater Research, 2009, Vol. 43 To our knowledge there is no published information on the nutritional requirements of yellowtail kingfish, but there are several studies on the effect of different dietary formulations for Japanese yellowtail (S. quinqueradiata) and Mediterranean yellowtail (S. dumerili) (Takii et al. 1989;Ukawa et al. 1994;Masumoto et al. 1996;Ruchimat et al. 1997a,b;Watanabe et al. 2000a;Tomás et al. 2005;Vidal et al. 2008). Most of these studies relate to the optimisation of protein inclusion rates, or substituting fish meal with other animal or plant protein sources. ...

... This may be due to the fact that AA reduces nitrite in the blood because of its antioxidant properties and is not related to a reduction in stress. Tolerance of Japanese parrot fish, Oplegnathus fasciatus, and spotted parrot fish, O. punctatus, to low dissolved oxygen appeared to be improved as dietary AA increased (Ishibashi et al. 1992). Gilthead seabream, Sparus aurata, fed an AA-free diet showed a higher concentration of plasma glucose at 3 hours after hypoxia stress and a higher concentration of plasma cortisol at 9 hours after hypoxia stress than fish fed diets containing AA (Henrique et al. 1998). ...