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Fig. 8 in Microglanis pataxo, a new catfish from southern Bahia coastal rivers, northeastern Brazil (Siluriformes: Pseudopimelodidae)

Fig. 8. Microglanis pataxo, live specimen in a field aquarium shortly after collection.

Fig. 5 in The loricariid catfish genus Lasiancistrus (Siluriformes) with descriptions of two new species

Fig. 5. Dorsal, lateral, and ventral views of Lasiancistrus guacharote, AUM 22136, 80.1 mm SL.

Fig. 8 in The loricariid catfish genus Lasiancistrus (Siluriformes) with descriptions of two new species

Fig. 8. Dorsal, lateral, and ventral views of Lasiancistrus schomburgkii, FMNH 111717, 124.0 mm SL.

Fig. 2 in Two new species of the catfish genus Trichomycterus (Siluriformes: Trichomycteridae) from the rio Ribeira de Iguape Basin, Southeastern Brazil

Fig. 2. Trichomycterus tupinamba, holotype, MZUSP 62382, 86.5 mm, lateral view of the right side.

Fig. 9 in Description and relationships of Otothyropsis marapoama, a new genus and species of Hypoptopomatine catfish (Siluriformes: Loricariidae) from rio Tietê basin, southeastern Brazil

Fig. 9. Suspensorium of Otothyropsis marapoama. Paratype, LIRP 5641, 29.0 mm SL.

Fig. 5 in Two new species of the catfish genus Trichomycterus (Siluriformes: Trichomycteridae) from the rio Ribeira de Iguape Basin, Southeastern Brazil

Fig. 5. Trichomycterus jacupiranga, holotype, MZUSP 67818, 57.4 mm.

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Fig. 11. Auchenipterichthys thoracatus, FMNH 57798, 89 in Catfishes of the genus Auchenipterichthys (Osteichthyes: Siluriformes: Auchenipteridae); a revisionary study

Fig. 11. Auchenipterichthys thoracatus, FMNH 57798, 89 mm SL; Brazil, Maciel, rio Guaporé basin.

opencc-by-4.0Jun 2004View details →

Fig. 2. Trichomycterus maracaya, n in Trichomycterus maracaya, a new catfish from the upper rio Paraná, southeastern Brazil (Siluriformes: Trichomycteridae), with notes on the T. brasiliensis species-complex

Fig. 2. Trichomycterus maracaya, n. sp. (ZUEC 6138), juvenile 22.8 mm SL, paratype.

Fig. 2 in Entomocorus melaphareus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from the lower and middle reaches of the rio Amazonas

Fig. 2. Entomocorus melaphareus, paratype, MZUSP 76445, 43.1 mm SL.

Fig. 1 in Entomocorus melaphareus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from the lower and middle reaches of the rio Amazonas

Fig. 1. Entomocorus melaphareus, holotype, MZUSP 76413, 58.6 mm SL.

Fig. 2 in The late Miocene Phractocephalus catfish (Siluriformes: Pimelodidae) from Urumaco, Venezuela: additional specimens and reinterpretation as a distinct species

Fig. 2. Locality map of the Urumaco area and fossiliferous sites.

Fig 3 in Entomocorus melaphareus, a new species of auchenipterid catfish (Osteichthyes: Siluriformes) from the lower and middle reaches of the rio Amazonas

Fig 3. Distribution of Entomocorus melaphareus. Type locality is indicated by the number 1.

Figure 38. Cetopsis candiru, FMNH 112635 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 38. Cetopsis candiru, FMNH 112635, mature male, 194 mm SL; Peru, Loreto, Río Pastaza basin.

Figure 40. Cetopsis oliveirai, MUSM 9033, 30.6 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 40. Cetopsis oliveirai, MUSM 9033, 30.6 mm SL; Peru, Madre de Dios, Palma Real.

Figure 35. Cetopsidium minutum, ANSP 175839, 21 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 35. Cetopsidium minutum, ANSP 175839, 21 mm SL; Guyana, Essequibo River.

Figure 41. Cetopsis sandrae, MZUSP 83227 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 41. Cetopsis sandrae, MZUSP 83227, female, 75 mm SL; Brazil, Mato Grosso, Nova Mutum.

Figure 34. Helogenes marmoratus, USNM 273057, 63.5 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 34. Helogenes marmoratus, USNM 273057, 63.5 mm SL; Guyana, Potaro River.

Figure 39. Cetopsis coecutiens, MCNG 5262, 216 in A phylogenetic study of the neotropical catfish family Cetopsidae (Osteichthyes, Ostariophysi, Siluriformes), with a new classification

Figure 39. Cetopsis coecutiens, MCNG 5262, 216 mm SL; Venezuela, Apure, Río Sarare.

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Environmental-related variation of stoichiometric traits in body and organs of non-native sailfin catfishes Pterygoplichthys spp.

Intraspecific variation in stoichiometric traits was thought to be an adaptive response to reduce the elemental imbalance between organisms and diet in the habitat. Studying the spatial variation of stoichiometric traits of non-native species and the factors contributing to the variation could help to better understand the invasion mechanism of non-native fish. In this study, stoichiometric traits (i.e. carbon [C], phosphorus [P], calcium [Ca] and their ratios) variation in the body and organs of non-native sailfin catfishes Pterygoplichthys spp. were investigated across 13 river sections in the main river basins of south China. The relationships between environmental factors and stoichiometric traits were analyzed using a general linear model and an information-theoretic approach. A manipulated feeding experiment was conducted to investigate the impact of food quality on the stoichiometry of sailfin catfishes in a greenhouse. Sailfin catfishes exhibited considerable variability in body and organ elemental composition. Site identity was the main factor contributing to the variation, which could be explained by a combination of environmental factors including climate, diet quality, fish species richness, and trophic status in the invaded rivers. Water chemistry (i.e. total nitrogen and phosphorus, ammonia nitrogen, and soluble reactive phosphorus) contributed to the most variation of stoichiometric traits. Imbalances of P and Ca between sailfin catfishes and food resources varied among sampling sites, reflecting the spatial heterogeneity of nutrient limitation. Juvenile sailfin catfishes exhibited stoichiometric homeostasis (0<1/H<0.25) for all elemental contents and ratios in the feeding experiment. These findings suggested variation in stoichiometric traits of sailfin catfishes might be attributed to the changes in elemental metabolism to cope with context-specific environments. This study provided heuristic knowledge about environmental-related variation in stoichiometric traits, which could enhance the understanding of the non-native species' adaptation to resource fluctuation in the invaded ecosystems.