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461.
Kawaguchi Osamu Tanaka Mao Yoshii Minami Iwamoto Yuji Midooka Anise Toutani Fukutarou Nagao Norio Matsumoto Takuya Mabuchi Ryota Tanimoto Shota 《Fisheries Science》2019,85(3):553-560
Fisheries Science - We detected an earthy/musty off-flavor in the flesh of red sea bream Pagrus major cultured under low saline water conditions using two types of recirculating aquaculture systems... 相似文献
462.
Shigenobu Namiki Hiroshige Tanaka Satoshi Katayama Osamu Funaki Ichiro Aoki Yoshioki Oozeki 《Fisheries Science》2010,76(6):951-959
In order to validate daily increment formation in otoliths of immature and adult Japanese anchovy Engraulis japonicus, three rearing experiments using chemical marking of otoliths were conducted on adult anchovy in summer 2004 and immature
anchovy in summer 2005 and in winter 2006. In the two experiments conducted in summer, the number of otolith microincrements
between alizarin complexone (ALC) marks showed that microincrements were formed daily. In the summer 2005 experiment, immature
anchovy under conditions of reduced daily food rations also showed daily microincrement formation. Average increment width
was 0.9 μm in adults and 1.8–3.1 μm in immature anchovy. In contrast, no clear increments were observed between ALC marks
on the otoliths from the experiment in winter 2006, and scanning electron microscope (SEM) observations failed to confirm
clear increment formation. We consider that low water temperatures (<13–14°C) restricted otolith growth and lowered the contrast
between the discontinuous and the incremental zones of the otolith increments. For age estimation of Japanese anchovy, clear
increments wider than about 1 μm in the otolith can be regarded as daily increments. However, daily age estimation of immature
and adult anchovy that experience low water temperatures in winter may be difficult due to the obscurity of the increments. 相似文献
463.
Eric Gilman Jeff Gearhart Blake Price Scott Eckert Henry Milliken John Wang Yonat Swimmer Daisuke Shiode Osamu Abe S. Hoyt Peckham Milani Chaloupka Martin Hall Jeff Mangel Joanna Alfaro-Shigueto Paul Dalzell & Asuka Ishizaki 《Fish and Fisheries》2010,11(1):57-88
There is growing evidence that small-scale, coastal, passive net fisheries may be the largest single threat to some sea turtle populations. We review assessments of turtle interactions in these fisheries, and experiments on gear-technology approaches (modifying gear designs, materials and fishing methods) to mitigate turtle by-catch, available from a small number of studies and fisheries. Additional assessments are needed to improve the limited understanding of the relative degree of risk coastal net fisheries pose to turtle populations, to prioritize limited conservation resources and identify suitable mitigation opportunities. Whether gear technology provides effective and commercially viable solutions, alone or in combination with other approaches, is not well-understood. Fishery-specific assessments and trials are needed, as differences between fisheries, including in gear designs; turtle and target species, sizes and abundance; socioeconomic context; and practicality affect efficacy and suitability of by-catch mitigation methods. Promising gear-technology approaches for gillnets and trammel nets include: increasing gear visibility to turtles but not target species, through illumination and line materials; reducing net vertical height; increasing tiedown length or eliminating tiedowns; incorporating shark-shaped silhouettes; and modifying float characteristics, the number of floats or eliminating floats. Promising gear-technology approaches for pound nets and other trap gear include: replacing mesh with ropes in the upper portion of leaders; incorporating a turtle releasing device into traps; modifying the shape of the trap roof to direct turtles towards the location of an escapement device; using an open trap; and incorporating a device to prevent sea turtle entrance into traps. 相似文献
464.
Seung-Cheol Ji Osamu Takaoka Si-Woo Lee Jae-Ho Hwang Yang-Su Kim Katsuya Ishimaru Manabu Seoka Gwan-Sik Jeong Kenji Takii 《Fisheries Science》2009,75(3):665-672
The effect of dietary medicinal herbs on lipid metabolism and stress recovery was investigated in red sea bream Pagrus major. Fish (mean body weight 24.0 ± 0.2 g) were fed on test fish meal diets supplemented with either Massa Medicata (Mm), Crataegi
Fructus (Cf), Artemisia capillaries (Ac), or Cnidium officinale (Co), or with a mixture of the four herbs (HM) for 12 weeks. A control group was fed a diet without herbs in the same manner.
A high survival rate was observed in the herbal diet groups. The final mean body weight, feed efficiency, protein efficiency
ratio, and apparent protein and lipid retention in the Ac, Co, and HM groups were higher than those in the control and Mm
groups. Final carcass, hepatic lipid and triglyceride contents, and plasma triglyceride and nonesterified fatty acid levels
were lower in the Ac, Co, and HM groups compared to those of control and Mm groups. However, final hepatic phospholipid, plasma
phospholipid, and high density lipoprotein cholesterol levels were higher in the Ac, Co, and HM diets groups than in the control
and Mm groups. The Cf, Co, Ac, and HM groups showed faster recovery time in the 2-phenoxyethanol anesthesia test and a higher
recovery rate in the 10-min air exposure test than those of the control and Mm groups. Moreover, the Cf, Ac, Co, and HM diet
groups had a significantly lower plasma cortisol level than the control and Mm diet group, but the glucose level in the herbal
diet groups was higher than that in the control group after a 1-h air exposure. These results indicate that the addition of
medicinal herbs to the fish diet improved lipid utilization and stress recovery in red sea bream. 相似文献
465.