منابع مشابه
Fresh-water Sawfishes and Sharks in Netherlands New Guinea.
Latent Learning in Earthworrns: R. P. Bharucha-Reid .................. Fresh-water Sawfishes and Sharks in Netherlands New Guinea: M. Boeseman .................................................. Inhibition of Audiogenic Seizures by Carbon Dioxide: W. G. AIitchell and R. C. Grubbs .................................. Use of Glycine in Bovine Semen Extenders Stored at 50 and 78°C: J. M. Rakes and 0....
متن کاملRectal Glands of Marine and Fresh-Water Sharks: Comparative Histology.
The rectal glands of elasmobranchs perform the function of salt-excreting organs. These glands are smaller and show regressive changes in specimens of the bull shark, Carcharhinus leucas found in fresh-water environment, compared with specimens of this and other species from a marine habitat.
متن کاملWater-escape velocities in jumping blacktip sharks.
This paper describes the first determination of water-escape velocities in free-ranging sharks. Two approximations are used to estimate the final swimming speed at the moment of penetrating the water surface. Blacktip sharks were videotaped from below the surface and parameters were estimated by analysing the sequences frame by frame. Water-escape velocities averaged 6.3 ms(-1). These velocitie...
متن کاملChapter 7 Fresh Water Coordinating
7.4 Consequences for Human Well-being of Changes in the Provision of Fresh Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190 7.4.1 Freshwater Provision: Benefits and Investment Requirements 7.4.2 Consequences of Water Scarcity 7.4.3 The Cost and Pricing of Water Delivery 7.4.4 Consequences of Too Much Water: Floods 7.4.5 Consequences of Poor Water Quali...
متن کاملInvasive Fresh Water Snail, China
tion of anthrax vaccine virulence factors by polymerase chain reaction. Okinaka R, et al. Multiple -locus variable-number tandem repeat analysis reveals genetic relationships within Bacillus anthracis. Preliminary studies on recom-binant protective antigen (rPA) vaccine against anthrax for veterinary use. In: Ab-To the Editor: Pomacea canalic-ulata, an invasive freshwater snail native to South ...
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ژورنال
عنوان ژورنال: Science
سال: 1893
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-22.551.111-a