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Dugesia Stock Photos and Images
RM2J1WD77–Freshwater flatworm (Dugesia gonocephala) on dead leaf, Europe, April, controlled conditions
RM2C66XB6–Planarian common flatworm, Dugesia, freshwater invertebrate found in unpolluted flowing surface waters. T.S. Brightfield photomicrograph
RF2MHAKY0–Darkfield image of a black planarian flatworm (Girardia dorotocephala) from a stream in Delta, British Columbia, Canada
RMW7R76C–Large red damselfly nymph (Pyrrhosoma nymphula) and freshwater flatworm (Dugesia subtentaculata) in the planktonic stalked colonies (Epistylis) Europe, August, controlled conditions
RMRHNA61–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPONSE TO WEAK MAGNETIC FIELD 275 RESOLUTION OF MAGNETIC FIELD DIRECTION One final experimental study was conducted with Dugesia between June 20 and August 16, 1961. Two observers were involved, working concurrently. The ex- periment was performed on 21 different mornings distributed over the two-month period. For each daily series 15 worms were observed moving compass-North under each of 11 conditions presented in shuffled order. The observers were wholly uninformed of the conditions which obtained at the time of their ob
RF2MWN3JY–Darkfield image of a black planarian flatworm (Girardia dorotocephala) from a stream in Delta, British Columbia, Canada
RF2MWN3JX–Brightfield image of a black planarian (Girardia dorotocephala) from a stream in Delta, British Columbia, Canada
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPONSE TO WEAK MAGNETIC FIELD 265. FIGURE 1. The apparatus employed in the study of response of Dugesia to magnetism, showing arrangement of (A) 7s-watt opalescent lamp; (B) sleeved light-conducting glass tubes; (C) Petri dish centered over a polar coordinate grid. (Brown, Bennett and Webb, 1960; Brown and Webb, 1960; Brown, 1960; and Brown and Barnwell, 1961). The character of the response to magnetic field exhibits rhythmic changes that are regulated by the solar-day and lunar-day "clocks" of the snails, and by Stock Photo](https://c8.alamy.com/comp/RHNA6K/the-biological-bulletin-biology-zoology-biology-marine-biology-response-to-weak-magnetic-field-265-figure-1-the-apparatus-employed-in-the-study-of-response-of-dugesia-to-magnetism-showing-arrangement-of-a-7s-watt-opalescent-lamp-b-sleeved-light-conducting-glass-tubes-c-petri-dish-centered-over-a-polar-coordinate-grid-brown-bennett-and-webb-1960-brown-and-webb-1960-brown-1960-and-brown-and-barnwell-1961-the-character-of-the-response-to-magnetic-field-exhibits-rhythmic-changes-that-are-regulated-by-the-solar-day-and-lunar-day-quotclocksquot-of-the-snails-and-by-RHNA6K.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPONSE TO WEAK MAGNETIC FIELD 265. FIGURE 1. The apparatus employed in the study of response of Dugesia to magnetism, showing arrangement of (A) 7s-watt opalescent lamp; (B) sleeved light-conducting glass tubes; (C) Petri dish centered over a polar coordinate grid. (Brown, Bennett and Webb, 1960; Brown and Webb, 1960; Brown, 1960; and Brown and Barnwell, 1961). The character of the response to magnetic field exhibits rhythmic changes that are regulated by the solar-day and lunar-day "clocks" of the snails, and by Stock Photo")
RMRHNA6K–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPONSE TO WEAK MAGNETIC FIELD 265. FIGURE 1. The apparatus employed in the study of response of Dugesia to magnetism, showing arrangement of (A) 7s-watt opalescent lamp; (B) sleeved light-conducting glass tubes; (C) Petri dish centered over a polar coordinate grid. (Brown, Bennett and Webb, 1960; Brown and Webb, 1960; Brown, 1960; and Brown and Barnwell, 1961). The character of the response to magnetic field exhibits rhythmic changes that are regulated by the solar-day and lunar-day "clocks" of the snails, and by
RF2MHAM2N–Brightfield image of a black planarian (Girardia dorotocephala) from a stream in Delta, British Columbia, Canada
RF2MWN3PJ–Black planarian flatworm (Girardia dorotocephala) from a stream in Delta, British Columbia, Canada, crawling across the dead leaf of an aquatic plant
RMRHNAMC–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 2. A. Mean monthly variation in path of Dugesia initially directed South with orienting light sources behind and to the right of the worms during a IS-minute assay period. B. Same, immediately after 180° clockwise rotation of the whole apparatus to North. C and D. Repeat of same, except with counterclockwise rotation. worm-samples after rotation of the apparatus to South, clockwise and counter- clockwise. Generally similar to one another are the two independently obtained monthly patterns of variation of the worms whi
RMRHNT1J–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NORTH. 30 18 6 18 -8° -4C FIGURE 10. Frequency distributions of differences in path of southbound and northbound Dugesia, moving between large equipotential plates in the afternoon, when a gamma plate was to the left and when it was to the right (6 X background). Negative values indicate turning away from side of gamma source, positive values, toward source. N-bound responses is significantly higher than the variance of the S-bound re- sponses (F= 1.37 ;N, = 152, N2 = 152; P < 0.01). DISCUSSION The results of this investi
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOLECULAR PHYLOGENY OF DICYEMIDS 89 • eni>pus laevis — Artemia salina — Asterta* amurenxix j Crasso ITI= i PI • Sagitta crassa Crassostrea gigux Shistosoma mansoni Dugesia japonica • Planncera mullitentaculata 'Molini/nrmix molimformis —^—^^— Caenorhabditis elegans l^""""/"'" naika ^ ^ ^ ^— Henneguya sp. • Dicvema acuticephalum "I— Dicema oriental? Triploblasts. .nemonia xulcata Trichoplax adhaerens Beroe cucumis Scvpha ciliata Arabidapsis thaliana Vnlvox carteri Hartmanella verm Stock Photo](https://c8.alamy.com/comp/RHMBNY/the-biological-bulletin-biology-zoology-biology-marine-biology-molecular-phylogeny-of-dicyemids-89-enigtpus-laevis-artemia-salina-asterta-amurenxix-j-crasso-iti=-i-pi-sagitta-crassa-crassostrea-gigux-shistosoma-mansoni-dugesia-japonica-planncera-mullitentaculata-molininrmix-molimformis-caenorhabditis-elegans-lquotquotquotquotquotquot-naika-henneguya-sp-dicvema-acuticephalum-quoti-dicema-oriental-triploblasts-nemonia-xulcata-trichoplax-adhaerens-beroe-cucumis-scvpha-ciliata-arabidapsis-thaliana-vnlvox-carteri-hartmanella-verm-RHMBNY.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOLECULAR PHYLOGENY OF DICYEMIDS 89 • eni>pus laevis — Artemia salina — Asterta* amurenxix j Crasso ITI= i PI • Sagitta crassa Crassostrea gigux Shistosoma mansoni Dugesia japonica • Planncera mullitentaculata 'Molini/nrmix molimformis —^—^^— Caenorhabditis elegans l^""""/"'" naika ^ ^ ^ ^— Henneguya sp. • Dicvema acuticephalum "I— Dicema oriental? Triploblasts. .nemonia xulcata Trichoplax adhaerens Beroe cucumis Scvpha ciliata Arabidapsis thaliana Vnlvox carteri Hartmanella verm Stock Photo")
RMRHMBNY–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOLECULAR PHYLOGENY OF DICYEMIDS 89 • eni>pus laevis — Artemia salina — Asterta* amurenxix j Crasso ITI= i PI • Sagitta crassa Crassostrea gigux Shistosoma mansoni Dugesia japonica • Planncera mullitentaculata 'Molini/nrmix molimformis —^—^^— Caenorhabditis elegans l^""""/"'" naika ^ ^ ^ ^— Henneguya sp. • Dicvema acuticephalum "I— Dicema oriental? Triploblasts. .nemonia xulcata Trichoplax adhaerens Beroe cucumis Scvpha ciliata Arabidapsis thaliana Vnlvox carteri Hartmanella verm
RMRHNRF7–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SUCCINOXIDASE ACTIVITY IN DUGES1A 319 12 II 10 CVJ o 8- o. I/7 le1 Is1 ho In1 ' 12 pH FIGURE 1. The effect of pH on succinoxidase activity in whole body homogenates of Dugesia dorotocephala. in terms of optimum conditions for enzyme activity would be expected at the cellular level. It is possible, too, that the ability of planarians to convert their external medium to a constant pi 1 may be correlated with the optimum activity of succinoxidase in these animals.. Please note that these images are extracted from scanned page i
RMRHNRFB–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. < a z <. FM + 14 FIGURE 1. A. Mean monthly variation in path of Dugesia initially directed North with orienting light sources behind and to the right of the worms during a 15-minute assay period. B. Same, immediately after 180° clockwise rotation of the whole apparatus to South. C and D. Repeat of same except with counterclockwise rotation. Ordinate: Degrees of turn to left. Abscissa: Days relative to full moon.. Please note that these images are extracted from scanned page images that may have been digitally enhanced
RMP2D5F1–. English: Ovary of Dugesia aborensis, x620. 28 November 2012, 17:27:53. Whitehouse RH 17 Dugesia aborensis ovary
RMRHGP28–. Boletin de la Sociedad de Biología de Concepción. Sociedad de Biología de Concepción; Biology; Biology. Bol. Soc. Biol de Concepción, XLVIII, 1974. de Pedersen (1959, 1963) para Planaria vitta Dugés y Dugesis tigrina (Girard). Ocasionalmente se observaron proyecciones de estas glándulas parenquimáticas hacia la epidermis en Dugesia dorotocephala. El se- gundo tipo de glándulas cianófilas, teñidas intensamente de rojo con el PAS concuerda con las glándulas descritas por Hyman (1925) para Planaria dorotocephala Woodworth. Hay acuerdos entre varios autores para atribuir la basofilia a ácidos nu
RMP2DAWT–. English: Dugesia aborensis, x14. As seen when cleared in cedar-wood oil. 28 November 2012, 17:27:28. Whitehouse RH 17 Dugesia aborensis
RMRHNW72–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 314 H. BURR STEINBACH TABLE III Per cent specific activity of K42 in Dugesia after equilibration with K^ solutions of ionic com- position indicated for five hours. Concentrations in mM/Kg. Concentrations measured for solution # 1, calculated for the others. The worms in solutions 3 and 4 showed definite signs of deterioration. Medium, mM Planaria K42 Spec. Act. Na Cl K Na Cl K 1. 2.4 3.0 1.0 13.3 17 37 6.5 2. 12.0 23.0 11.0 16.4 20 39 8.3 3. 22.0 33.0 21.0 18.7 23 41 13.0 4. 52.0 103.0 51.0 20.4 31 51 21.0 ever, the increase
Search Results for Dugesia Stock Photos and Images (44)
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