Seasonal Variations in Lipids and Fatty Acid Compositions of Frigate Mackerel Auxis rochei.

Morioka, Katsuji; Sakai, Syuhei; Takegami, Chie; Obatake, Atsushi

doi:10.2331/suisan.65.732

Cited by 13 publications

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“…Crude lipid content of otoshimi gel (1.8 ± 1.3%) was very low and did not vary seasonally. Generally, crude lipid content of fish muscle is influenced by the spawning period; it is high during the pre‐spawning season and low afterwards 15–23 . However, in rabbit fish, lipid content was high from July to October 2001 (during the spawning and spent periods), and in December 2001 (non‐spawning season).…”

Section: Resultsmentioning

confidence: 99%

“…Generally, crude lipid content of fish muscle is influenced by the spawning period; it is high during the pre-spawning season and low afterwards. [15][16][17][18][19][20][21][22][23] However, in rabbit fish, lipid content was high from July to October 2001 (during the spawning and spent periods), and in December 2001 (nonspawning season). Thus, rabbit fish meat was characterized by no correlation between GSI and Fig.…”

Section: Seasonal Variations In Ph and Whiteness Of Meat And Moisturementioning

confidence: 99%

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Seasonal variations in gel-forming ability of rabbit fish

2003

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We studied the potential utilization of rabbit fish (Siganus fuscescens) meat in textured products. We examined the gel-forming ability of rabbit fish caught between July 2001 and August 2002 off the coast of Nagasaki. Fish obtained from approximately July to September (during the spawning season and immediately after), had low gel-forming ability. Fish caught in winter or spring showed high elastic gel formation. Washing of meat with fresh water was found to be important for gel formation. It was concluded that rabbit fish meat has a high gel-forming ability and, therefore, that rabbit fish meat is suitable for textured food production except during the spawning season.KEY WORDS: gel-forming ability, rabbit fish, seasonal variations, spawning season.

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Section: Resultsmentioning

confidence: 99%

Section: Seasonal Variations In Ph and Whiteness Of Meat And Moisturementioning

confidence: 99%

Seasonal variations in gel-forming ability of rabbit fish

2003

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“…Horse mackerel caught offshore (including Goto-Nada) from Nagasaki prefecture, Japan, using small-to medium-sized purse seine are known as Shiroaji (white-skinned). Moreover, although seasonal changes of proximate composition occur in migratory fish such as horse mackerel and spotted sardine, [9][10][11][12][13][14][15][16][17] there have been no studies comparing horse mackerel caught in different fishing grounds. The horse mackerel caught offshore from Tsushima with small to medium-sized purse seine are Kiaji.…”

Section: Introductionmentioning

confidence: 99%

Chemical components and body color of horse mackerel caught in different areas

et al. 2002

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The chemical components and body color of horse mackerel caught between July 1997 and May 2000 were studied. The fish were caught with small‐ to medium‐sized purse seine offshore from Nagasaki and from Tsushima, and with bull trawl seine and medium‐ to large‐sized purse seine in the East China Sea. The crude lipid content of the fish caught offshore from Tsushima was higher than that of the others, and there were no significant differences among the other catches. The extractive nitrogen content of the fish caught with bull trawl seine was somewhat lower than that of the others. The body colors of the fish differed from those suggested by their common names: Kuroaji (black), Kiaji (yellow), and Shiroaji (white). The crude lipid content and body color indicated that there was no difference in quality among the catches, with the exception of the crude lipid content of the Tsushima catch.

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“…Seasonal variations in the lipid and fatty acid composition of frigate mackerel are known [18]. However, the same stored frozen fish were used during this study.…”

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Seasonal Changes of Blood Composition in Captive Bottlenose Dolphins.

Terasawa

Kitamura

Fujimoto

et al. 2002

The Journal of Veterinary Medical Science

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ABSTRACT. To determine how blood values in bottlenose dolphins changed during the year, 504 blood samples were taken from 9 dolphins from 1991 to 1999 and clinical blood examinations were undertaken monthly including 3 hematological and 19 serum chemistry tests. In creatinine, significant seasonal changes were found among three groups of adult males, adult females and juveniles, and the average values in summer were 15-38% higher than those in winter. In two out of three groups the average total cholesterol value were h ighest in winter, and the lowest of all groups were in summer. In two other groups the peaks of average FFA value were recorded in sum mer, and the lows were in winter. KEY WORDS: bottlenose dolphin, seasonal change, serum chemistry.J. Vet. Med. Sci. 64(11): 1075-1078, 2002 The physiology of free-living marine mammals adapts to seasonal environmental changes. It is known that bottlenose dolphins migrate seasonally, and the migration is probably a response to temperature changes [16,21]. Several physiological parameters, for example, the thickness of blubber [25], the body mass [21] and the rectal body temperature [23], are known to have seasonality even in captive dolphins.Seasonal changes in hematology have been recorded in birds [1,5,9,17,20,27] The blood samples taken from wild dolphins may be affected by several factors, including their handling stress and their diet. We previously reported how diet affected the blood composition of this species [24]. Therefore, it is necessary to examine the case of bottlenose dolphins in captivity. The information presented should help to establish a hematological base line of seasonal changes for bottlenose dolphins. It is important to be aware of seasonal changes for evaluating long-term physiological variations, for example, during pregnancy. Therefore, this report examines how blood values change seasonally in captive bottlenose dolphins, Tursiops truncatus, from the results of clinical blood examinations at Enoshima Aquarium from 1991 to 1999.Hematological data were compiled from the routine health records of 9 bottlenose dolphins (Table 1) which were divided into three groups: adult males (two dolphins, aged over 12 years), adult females (two dolphins, aged over 12 years), and juveniles (one male and four females, aged under 6 years) at Enoshima Aquarium, Kanagawa, Japan. This age classification was not changed throughout the study period. Three of these dolphins were born at this facility. The other six dolphins originated in waters around Japan. When they were brought into captivity, we estimated their ages from body length and body mass [22]. Clinical data over a 9-year period (1991 to 1999) for adult males and females, and a 5-year period (1995 to 1999) for juveniles were used, and a total of 504 blood samples were taken. Only blood samples from dolphins judged to be normal by behavior, appearance, or food consumption were used.The tank is outdoors with a total seawater volume of 5000 m 3 (45 m × 25 m, oval-shaped, with a depth of 3.5 to 5.5 m).

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Seasonal Variations in Lipids and Fatty Acid Compositions of Frigate Mackerel Auxis rochei.

Cited by 13 publications

References 0 publications

Seasonal variations in gel-forming ability of rabbit fish

Seasonal variations in gel-forming ability of rabbit fish

Chemical components and body color of horse mackerel caught in different areas

Seasonal Changes of Blood Composition in Captive Bottlenose Dolphins.

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