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Figure 3 in Tolerance limit of physicochemical water parameters in giant freshwater prawn (Macrobrachium rosenbergii) in a captive condition

Figure 3. Six replicates of the mean of cold temperature critical limit (maximum and minimum) subject to M. rosenbergii.

opencc-by-4.0Sep 2023View details →

Figure 6 in Tolerance limit of physicochemical water parameters in giant freshwater prawn (Macrobrachium rosenbergii) in a captive condition

Figure 6. Variation of different temperatures (29.8 °C, 20.9 °C, 16.9 °C, and 13.9 °C) in the experimental tank.

Fig. 10 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 10. Map of natural distribution of Macrobrachium rosenbergii (on the right side of dash line) and M. dacqueti (on the left side of dash line). Dashed line = distribution border of the two species.

Fig. 8 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 8. Macrobrachium rosenbergii: A, B, 2 adult males from Ajkwa R., Papua, Indonesia, not preserved; C, 2 ovigerous females from Dinas, the Philippines, not preserved.

Fig. 7 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 7. Abdomen: A, Macrobrachium rosenbergii (male 75.0 mm CL, Ajkwa R., Papua, Indonesia, not preserved); B, Macrobrachium dacqueti (male 62.80 mm CL, Mahakam R., Melak, E. Kalimantan, Indonesia).

Fig. 5 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 5. Carapace: A, Macrobrachium rosenbergii (male 75.0 mm CL, Ajkwa R., Papua, Indonesia, not preserved); B–C, M. dacqueti: B, adult (male 62.60 mm CL, Jaya R., Bukit Sarang area, Bintulu, Sarawak, East Malaysia, Borneo, coll. H. H. Tan (ZRC), 20 Aug.2005; C, young specimen from Serian, Sarawak, East Malaysia, Borneo, not preserved.

Fig. 9 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 9. Macrobrachium dacqueti: A, male 62.60 mm CL, Jaya R., Bukit Sarang area, Bintulu, Sarawak, East Malaysia, Borneo, coll. H. H. Tan (ZRC), 20 Aug.2005; B, male 88.90 mm CL, Lake Semayang, E. Kalimantan, Indonesia, coll. D. Wowor & H. H. Tan (MZB), Nov.1999; C, male 62.80 mm CL, Mahakam R., Melak, E. Kalimantan, Indonesia); D, 2 males, from aquaculture, Philippines, originating from Thailand, not preserved.

Fig. 6 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 6. Young individuals: A–B, Macrobrachium rosenbergii: A, 45.0 mm CL, Tambulig, Panguil Bay, Mindanao, Philippines, not preserved; B, Ajkwa R., Papua, Indonesia, not preserved; C, M. dacqueti, Serian, Sarawak, East Malaysia, Borneo, not preserved.

Fig. 4 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 4. Macrobrachium dacqueti (Sunier, 1925): A, ovigerous female 41.90 mm CL, lateral view (ZRC 2000.2408); B, male 64.15 mm CL, close up, carpus of second pereiopod (SAM C 11228).

Fig. 3 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 3. Macrobrachium rosenbergii (de Man, 1879): A, ovigerous female 39.10 mm CL, lateral view (MZB); B, male 83.30 mm CL, close up, carpus of second pereiopod (QM W 16487).

Fig. 1 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 1. Scatterplot of MDA scores (first root) for the two supposed subspecies, adults only. Symbols: Macrobrachium rosenbergii rosenbergii females (filled circle), M. r. rosenbergii males (empty circle), M. r. dacqueti females (filled square) and M. r. dacqueti males (empty square). Eigenvalue = 28.709; Wilks's λ = 0.034; χ2 = 200.095, df = 8, p <0.0001.

Fig. 2 in The Giant Freshwater Prawns Of The Macrobrachium Rosenbergii Species Group (Crustacea: Decapoda: Caridea: Palaemonidae)

Fig. 2. Scatterplot of MDA scores (first root) for the two supposed subspecies, males only. Symbols: Macrobrachium rosenbergii rosenbergii adult males (filled circle), M. r. rosenbergii young males (empty circle), M. r. dacqueti adult males (filled square) and M. r. dacqueti young males (empty square). Eigenvalue = 6.587; Wilks's λ = 0.132; χ2 = 267.485, df = 8, p <0.0001.

Figure 5 in Influence of color and brightness on ontogenetic shelter preference by the prawn Macrobrachium rosenbergii (Decapoda: Palaemonidae)

Figure 5. Preference for shelters of different colors by juvenile and adult prawns. The bars represent the number of records of occupancy for each shelter. Black bars represent shelters that were chosen significantly above the expectancy level. Grey bars represent shelters chosen at expected frequencies. The white bar represents a shelter chosen significantly below expectancy levels.

Figure 4 in Influence of color and brightness on ontogenetic shelter preference by the prawn Macrobrachium rosenbergii (Decapoda: Palaemonidae)

Figure 4. Chromaticity-luminance diagram for the visual system of prawns. Inferred chromatic and achromatic signals, determined for a perfectly white surface (asterisk depicted in the diagram) and for shelters employed in our experiments (squares), are represented. Distance between squares indicates color and brightness differences in chromatic and achromatic signal axes, respectively. Short λ = short wavelengths (e.g. blues), Long λ = long wavelengths (e.g. yellows).

Figure 3 in Influence of color and brightness on ontogenetic shelter preference by the prawn Macrobrachium rosenbergii (Decapoda: Palaemonidae)

Figure 3. Illuminant spectrum of the experimental room. Illumination was provided by two fluorescent lamps.

Figure 2 in Influence of color and brightness on ontogenetic shelter preference by the prawn Macrobrachium rosenbergii (Decapoda: Palaemonidae)

Figure 2. Reflectance spectra of experimental shelters. The reflectance of each curve is represented as a percentage, compared to the maximum reflectance of the most reflective curve. Each curve is represented approximately the same color as the respective shelter.

Figure 1 in Influence of color and brightness on ontogenetic shelter preference by the prawn Macrobrachium rosenbergii (Decapoda: Palaemonidae)

Figure 1. Schematic view of the arrangement of shelters in an experimental aquarium. The prawns were individually tested in aquaria with 10 colored shelters arranged in two rows of five.