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229 results for “Epialtidae”
Figure 2 in Spider Crabs of the Samadinia pulchra complex (Crustacea: Decapoda: Epialtidae)
Figure 2. Samadinia pulchra (Miers in Tizard, Moseley, Buchanan & Murray, 1885), holotype male (pcl 19.3 mm, cw 13.0 mm), Philippines, NHM 1884.31. (A) dorsal; habitus; (B) thoracic sternum and pleon; (C) ventral anterior cephalothorax; (D) carapace, right lateral view.
Figure 1 in Spider Crabs of the Samadinia pulchra complex (Crustacea: Decapoda: Epialtidae)
Figure 1. Distribution of species of the Samadinia pulchra complex: S. pulchra (Miers in Tizard, Moseley, Buchanan & Murray, 1885) (▲), S. jimlowryi sp. nov. (●), S. livermorii (Wood-Mason in Wood-Mason & Alcock, 1891) (■).
Figure 6 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 6. Relationship between percentage of initial vasa deferentia dry weight (VDW) transferred during mating and carapace length of the female in Taliepus dentatus. Adolescent and adult males are indicated by dots and triangles, respectively. Line: linear fit of adolescent crabs (significant regression). Grey area: confidence interval (± 95%) of the fit (R v 3.4).
Figure 4 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 4. Mating characteristics of Taliepus dentatus of different male ontogenetic stages. (A) Average total duration of copulation of experimental mating pairs (n = 6 pairs per ontogenetic stage). (B) Average ejaculate delivery per female seminal receptacle (n = 6 pairs per ontogenetic stage). P-value is indicated. Values are means + SE (R v 3.4).
Figure 2 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 2. Box plot of seasonal vasosomatic index (VSI) of Taliepus dentatus from Los Molinos Bay, Chile. Boxes: interquartile range of the data (first quartile, median and third quartile). Whiskers: the values that extend to 1.5 times the interquartile range. Circles: outliers. Letters indicate significant differences (p <0.05) (R v 3.4).
Figure 1 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 1. Procedures involved in experimental mating in Taliepus dentatus. (A) Dorsal view of opened cephalothorax displaying the male reproductive system. Dissection of paired vasa deferentia after experimental mating. Paired vasa deferentia (vd) and testes (t) are indicated by arrows. Scale bar = 10 mm. (B) During copulation the male (m) was positioned above the female (f) in the sternum-to-sternum position. The opened pleon of the female was visible below the male crab, which is indicated by the arrow (photos: K. Pretterebner, photoshop).
Figure 5 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 5. Relationship between ejaculate delivered per female seminal receptacle and carapace length of the female in Taliepus dentatus. Adolescent and adult males are indicated by dots and triangles, respectively. Line: linear fit of adolescent males (significant regression). Grey area: confidence interval (± 95 %) of the fit. Data correspond to experimental matings under equal sex ratio (R v 3.4).
Figure 3 in Mating and ejaculate allocation pattern in the kelp crab Taliepus dentatus (Decapoda: Epialtidae)
Figure 3. Regression lines of the log 10 chela height (CH) vs. log 10 carapace length (CL) for adolescent (y = 1.414 – 1.386x) and adult males (y = 1.842 – 2.240x) in Taliepus dentatus. Adolescent and adult males are indicated by dots and triangles, respectively (R v 3.4).
Figure 6 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 6. Mean time (s), with standard error bars, spent grooming body regions in 30-min isolation observations (N=142), A. Mean time grooming body regions (H=291, df=14, p<0.001), with x-axis organized by anterior body regions on the left to posterior body regions on the right. Sensory and respiratory structures were designated by gray bars: A1, A2, E, G; decoration body regions were designated by a black bars: R, RG, M, P. White bars are body regions not associated with sensory, respiratory, or decorations. B. Mean time grooming of sensory/respiratory structures (gray bars) compared to body regions where decorations (black bars) are attached (N=598, t=9.48, p<0.001). A1, first antennae; A2, second antennae; ABD, abdomen; AM, all maxillipeds; E, eye; G, gills; M, dorsal mid-carapace; LC, left P1 cheliped; M1, first maxilliped; M2, second maxilliped; 3M, third maxilliped; P, pereiopods 2–5 (walking legs); R, rostrum; RC, right P1 cheliped; RG, lateral ridge. Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Figure 8. Gills from the ablation experiment, with images A–D from the side with the 3M epipod ablated and images E–H from the side with all gill grooming appendages intact. A in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 8. Gills from the ablation experiment, with images A–D from the side with the 3M epipod ablated and images E–H from the side with all gill grooming appendages intact. A. Dorsal view of gill, with the central axis and lamellae both fouled; inset showing "shark teeth" nodules on lamellae with minimal fouling. B. Ventral view of gill, with minimal fouling between lamellae. C. Ventral view of gill, with heavily fouled lamellae mostly of sediment. D. Fouling by a gooseneck barnacle attached to lamellae, with minimal. E. Dorsal view of gill, with the central axis and lamellae both fouled; inset showing "shark teeth" nodules on lamellae with fouling. F. Ventral view of gill, with fouling in between lamellae. G. Ventral view of gill, with fouling on gill surface and simple setae along edge. H. Fouling by a gooseneck barnacle attached to lamellae, with minimal fouling.
Figure 5 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 5. Mean frequency of grooming mechanism, with standard error bars, mechanisms in 30-min isolation observations (N=142; scrape/pick: z=1.16, p=0.246; flap/brush: z=2.18, p=0.029). Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Figure 4 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 4. Mean frequency of grooms, with standard error bars, by grooming appendages in 30-min isolation observations (N=142). A. Mean frequency of grooms for each of the grooming appendages, with genders combined (z=3.39, p<001). B. Mean frequency of grooms for each of the grooming appendages, with the genders separated; males groomed with their 3M more than P1 (z=3.23, p=0.001) whereas females groomed with the 3M and P1 appendages equally (z=1.40, p=0.140). 3M, third maxilliped; P1, pereiopod #1 (cheliped). Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Figure 3 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 3. Frequency of grooms, with standard error bars, per body region during 30-min isolation observations (N=142; N=89 males; N=53 females) for males and females. A. Mean frequency of grooms for males and females for body regions (males: H=248, p<0.001; females: H=101, p<0.001); x-axis organized by anterior body regions on the left to posterior body regions on the right. B. Grooming frequency of sensory and respiratory structures compared to body regions where decorations are attached for males and females (sensory/respiratory: N=568, df=540, t=- 2.67, p=0.008; decorating: N=568, df=523, t=-1.97, p=0.049). A1, first antennae; A2, second antennae; ABD, abdomen; AM, all maxillipeds; E, eye; G, gills; M, dorsal mid-carapace; LC, left P1 cheliped; M1, first maxilliped; M2, second maxilliped; 3M, third maxilliped; P (_), pereiopods 2–5 (walking legs); R, rostrum; RC, right P1 cheliped; RG, lateral ridge. Note: Sensory and respiratory body regions were A1, A2, E, G; decoration body regions were R, RG, M, P. Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Figure 1 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 1. Relationship between grooming frequency and grooming time budget by carapace width (mm) for males and females in 30-min isolation observations (N=142). A. Mean grooming frequency by carapace width for males and females; no relationship between number of times individuals groomed and their body size (R2=0.003, y=.092x+10.3). B. Mean grooming time budget by carapace width for males and females; no relationship between time spent grooming and body size (R2=0.005, y=1.044x+48.2).
Figure 7 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 7. Mean frequency and time (s), with standard error bars, of individuals behaviors in 30-min agonistic observations (N=45). A. Mean frequency of behaviors (H=82.6, df=4, p<0.001). B. Mean time budget spent performing behaviors (H=75.6, df=4, p<0.001). Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Figure 2 in Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Figure 2. Grooming frequency and grooming time, with standard error bars, of males and females in 30-min isolation observations (N=142 total; N=89 males; N=53 females). A. Mean frequency of grooms by males and females (z=-10.3, p<0.001). B. Mean time spent grooming by males and females (z=1.95, p=0.0507). Note: Similar letters indicate no statistical significance (p>0.05) and different letters indicate a statistical significance (p<0.05).
Fig. 12 in A New Kelp Crab Species of the Genus Pugettia (Crustacea: Decapoda: Brachyura: Epialtidae) from Shandong Peninsula, Northeast China
Fig. 12. Comparison of the relationships between relative length of hepatic lobe (Hpl/PoL) against postrostral carapace length (PCL) among P. quadridens (De Haan, 1837), P. ferox Ohtsuchi and Kawamura, 2019, and P. longipes n. sp. (modified after Ohtsuchi and Kawamura 2019: fig. 39).
Fig. 8. First ambulatory legs. A–C, Pugettia longipes n in A New Kelp Crab Species of the Genus Pugettia (Crustacea: Decapoda: Brachyura: Epialtidae) from Shandong Peninsula, Northeast China
Fig. 8. First ambulatory legs. A–C, Pugettia longipes n. sp., holotype, full-grown male (MBM 188862), 17.3×13.0 mm, Shandong, North China; D, P. ferox Ohtsuchi and Kawamura, 2019, holotype, full-grown male (NSMT-Cr 26069), 40.0×32.1 mm, Otsuchi Bay, Japan; E, P. quadridens (De Haan, 1837), full-grown male (NSMT-Cr 26059), 27.3×22.4 mm, Miura Peninsula, Japan. A, D, E, right first ambulatory legs (P2), general appearance (upper surface); B, carpus (extensor surface); C, right second ambulatory leg (P3), general appearance (upper surface).
Fig. 6. Pugettia longipes n in A New Kelp Crab Species of the Genus Pugettia (Crustacea: Decapoda: Brachyura: Epialtidae) from Shandong Peninsula, Northeast China
Fig. 6. Pugettia longipes n. sp. holotype, male (MBM 188862), 17.3×13.0 mm, Shandong, Northeast China. A–C, carpus of right cheliped, dorsal (A), extensor (B), and ventral (C) views, respectively; D–G, merus of right cheliped, inner (D), dorsal (E), outer (F), and ventral (G) views, respectively.
Fig. 5. Pugettia longipes n in A New Kelp Crab Species of the Genus Pugettia (Crustacea: Decapoda: Brachyura: Epialtidae) from Shandong Peninsula, Northeast China
Fig. 5. Pugettia longipes n. sp. A, thoracic sternites 1–4; B, male pleon and sternites; C, female sterno-pleonal cavity; D, E, female gonopore (left) in allotype (D) and paratype (E); F, third maxilliped (left). A, B, paratype, full-grown male (MBM 188864), 12.9×9.3 mm; C, D, allotype, full-grown female (MBM 188863), 15.1×10.7 mm; E, paratype, full-grown female (MBM 188866), 18.3×13.7 mm; F, holotype, fullgrown male (MBM 188862), 17.3×13.0 mm.
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