کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9448852 | 1305960 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of diet and gastrointestinal fermentation on key enzymes of substrate utilization in marine teleost fishes
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The influence of diet and gastrointestinal fermentation on key enzymes of substrate utilization in marine teleost fishes The influence of diet and gastrointestinal fermentation on key enzymes of substrate utilization in marine teleost fishes](/preview/png/9448852.png)
چکیده انگلیسی
Three closely related marine teleosts with similar size, swimming mode, and habitat preference were compared to test the hypothesis that energy metabolism is linked to diet choice in the wild. Key substrate-utilization enzyme activities were assayed from white locomotory muscle and liver in a carnivore (Scorpis violaceus), an omnivore (Girella tricuspidata), and a herbivore (Kyphosus sydneyanus) collected from their natural reef habitat in northeastern New Zealand. The similar energy requirements of the study fishes were reflected in specific enzyme activities of white muscle and suggested high dependence on endogenous fuel that is independent of dietary carbohydrate intake. Clear differences were found in enzymes of hepatic carbohydrate, fat, and ketone body metabolism that appear linked to diet choice and levels of gastrointestinal fermentation. Hepatic metabolism of fat and ketone bodies was also examined in New Zealand samples of the omnivorous Girella cyanea and the herbivorous Kyphosus bigibbus, and the tropical herbivorous species Kyphosus vaigiensis and Kyphosus cinerascens collected from the Great Barrier Reef, Australia. Overall, the results suggest that, like ruminants, herbivorous fishes such as Kyphosus species that rely upon gastrointestinal fermentation preferentially use lipids as major metabolic substrates by an increased capacity for lipid metabolism, and a lower capacity for glycolysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 317, Issue 1, 6 April 2005, Pages 97-108
Journal: Journal of Experimental Marine Biology and Ecology - Volume 317, Issue 1, 6 April 2005, Pages 97-108
نویسندگان
Megan E. Willmott, Kendall D. Clements, Rufus M.G. Wells,