Results 201 to 210 of about 5,703 (249)
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Ultrastructure of the eyes of the grass shrimp, Palaemonetes pugio
Cell and Tissue Research, 1984The cone cells and corneagenous cells possess extensive networks of smooth tubular endoplasmic reticulum that may be involved in optical reflectance and light-adaptational responses, respectively. The extracellular basal lamina of the basement membrane is confluent with glial cell capillary walls and may prove to be a viaduct for the transmission of ...
DanielG. Doughtie, K.Ranga Rao
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Astronomical orientation and learning in the shrimp Palaemonetes antennarius
Marine Biology, 1989Adult and young individuals of the shrimp Palaemonetes antennarius (Milne Edwards) collected in the field (experienced), and laboratory-born (inexperienced) young were tested in a transparent bowl screened to hide the surrounding landscape from view. Field individuals were collected in South Tuscany, Italy, and testing was carried out in spring-summer ...
A. Ugolini, P. Talluri, M. Vannini
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A unique case of cytodifferentiation: Spermiogenesis of the prawn, Palaemonetes paludosus
Journal of Ultrastructure Research, 1979The sperm of the prawn, Palaemonetes paludosus, has an atypical form consisting of a cup-shaped nucleus and a rigid cross-striated spike extending from the convex side of the nucleus. The nucleus contains many membrane-bound, PAS-positive vesicles. During spermiogenesis, stacks of lamellar structures are located along the outer layer of the nuclear ...
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Techniques for the culture of ghost shrimp (palaemonetes pugio)
Environmental Toxicology and Chemistry, 1988Abstract The ghost shrimp, Palaemonetes pugio, is a common estuarine member of the food chain. It is widely used in bioassay testing by the U.S. Army Corps of Engineers and the U.S. Environmental Protection Agency. Culture techniques for the ghost shrimp have been established for more than 10 years.
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The effects of a simulated refinery effluent on the grass shrimp,Palaemonetes pugio
Archives of Environmental Contamination and Toxicology, 1978Duplicate static bioassays were conducted using a simulated refinery effluent on the grass shrimp (Palaemonetes pugio, Hippolyte sp.) with the LC-50 values recorded at 4-, 8-, 24-, 48-, and 96-hr intervals. The stimulated refinery effluent contained phenol (0.10 mg/L), sulfide (0.17 mg/L), chromium (0.25 mg/L), ammonia (10 mg/L), No.
L W, Hall, A L, Buikema, J, Cairns
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Microspectrophotometry of Photoreceptor Organelles from Eyes of the Prawn Palaemonetes
Science, 1968Microspectrophotometric measurements of individual dark-adapted rhabdoms of the prawn Palaemonetes vulgaris reveal the presence of two light-sensitive pigments. A pigment with maximum absorbancy at 555 nanometers is converted by light to a long-lived intermediate with wavelength of maximum absorbancy at 496 ...
T H, Goldsmith +2 more
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Light and dark adaptational changes in the accessory eye of the shrimp, Palaemonetes
Tissue and Cell, 1976The fine structure of the accessory eye of the shrimp, Palaemonetes, was studied after light and dark adaptation. Adjacent to the principal compound eye, the accessory eye is a small compound eye composed of about 20 ommatidia which are smaller in structure to the ommatidia of the principal compound eye.
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Avoidance of pesticides by grass shrimp (Palaemonetes pugio)
Bulletin of Environmental Contamination and Toxicology, 1973D J, Hansen, S C, Schimmel, J M, Keltner
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Effects of Cadmium on the Shrimps, Penaeus duorarum, Palaemonetes pugio and Palaemonetes vulgaris
1977DEL WAYNE R. NIMMO +2 more
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