Nutritional Limitation Travels up the Food Chain
نویسندگان
چکیده
منابع مشابه
Does moving up a food chain increase aggregation in parasites?
General laws in ecological parasitology are scarce. Here, we evaluate data on numbers of fish parasites published by over 200 authors to determine whether acquiring parasites via prey is associated with an increase in parasite aggregation. Parasite species were grouped taxonomically to produce 20 or more data points per group as far as possible. Most parasites that remained at one trophic level...
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important role in developing new treatments for fungal diseases such as athlete’s foot. “Fungi have a different mechanism from that of animals to produce lysine,” the reporter explained, “so if a drug can be developed that can disable the gene, it should be possible to treat people for fungal diseases without affecting their ability to make lysine”. The writer was presumably unaware that lysine...
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We analyze the effect of Wal-Mart’s entry into the grocery market using a unique store-level price panel data set. We use OLS and two IV specifications to estimate the effect of Wal-Mart’s entry on competitors’ prices of 24 grocery items across several categories. Wal-Mart’s price advantage over competitors for these products averages approximately 10%. On average, competitors’ response to entr...
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ژورنال
عنوان ژورنال: International Review of Hydrobiology
سال: 2008
ISSN: 1434-2944,1522-2632
DOI: 10.1002/iroh.200811066