Download e-book for iPad: Aquatic Invertebrates of Alberta by Hugh F. Clifford

By Hugh F. Clifford

ISBN-10: 0888642334

ISBN-13: 9780888642332

ISBN-10: 0888642342

ISBN-13: 9780888642349

ISBN-10: 1417591390

ISBN-13: 9781417591398

A very good range of invertebrate lifestyles lives underneath the outside of Alberta's lakes and streams. Aquatic Invertebrates of Alberta enhances latest box publications to organisms in Alberta, masking all significant teams of aquatic invertebrates. color pictures, pictorial keys, and 114 whole-specimen drawings supplement the textual content. This booklet is simply on hand throughout the collage of Alberta book place (print-on-demand).

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G. cladocerans. They even have been known to tackle small fish. The prey is entangled by one type of nematocyst, then stunned by another type, and eventually the tentacles will bring the prey to the mouth, which is located in the center of the column at the base of the tentacles. The prey will be swallowed into the blind-ending gut. A hydra might pack its gut with food until the column bulges; a well-fed hydra does not look at all like a hungry one. Reproduction Most hydrozoans (but not Hydra) have life cycles that exhibit two body forms.

Dendrocoelopsis species possibly occurring in this area have a more or less truncated head; but, unlike Polycelis coronata, have only two eyes and a ventral anterior adhesive organ. One nonpigmented (but with eyes) Dendrocoelopsis (D. alaskensis Kenk) superficially resembles Phagocata vitta. Survey of References The following references have information on Alberta's triclad fauna: Ball and Fernando (1968), Folsom (1976), Folson and Clifford (1978), Gallup et al. (1975), and Wrona et al. (1986).

Do not inhale or spill the nitric acid; it is very caustic and can result in a severe burn. Use enough nitric acid that little or no blackened carbon remains. This treatment will destroy the sponge tissue and the case of the gemmule but not the spicules. Add a little water to the residue and examine under a microscope. A better procedure is to add a drop of mounting medium, such as PVA (see METHODS), instead of water, and cover with a coverslip. Gemmule spicules are very small and should be viewed under high power of the microscope.

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Aquatic Invertebrates of Alberta by Hugh F. Clifford

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