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Fig. 22 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)

Fig. 22. Young specimen of Laemolyta proxima, MZUSP 27382, 92 mm SL; Brazil, Amazonas, Costa do Japão, Ressaca do Japão, lower rio Japurá.

opencc-by-4.0Jun 2006View details →

Fig. 7 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Fig. 7. (a) Map of northeastern segment of Southeastern Brazilian coast showing the complex system of Pre-Cambrian and Mesozoic continental rifts controlling drainage and topography. (b) Detail of the straight course of the rio Paraíba do Sul Rift Valley produced from a digital elevation model by radar interferometry (NASA, The Shuttle Radar Topography Mission).

opencc-by-4.0Jun 2006View details →

Fig. 3 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Fig. 3. Rivers and uplifts of Atlantic South America. A) break-up uplifts (megadomes) and associated principal rifts. Megadomes: Guyana/Guinea (1), NE Brazil/Niger (2), Mantiqueira/Angola (3), Uruguay/SW Africa (4), Somuncurá (5) and Deseado (6). Break-up rifts: Tacutu (I), Foz do Amazonas (II), Reconcavo Tucano-Jatobá (III) and Taubaté (IV). B) detail of the uplift from the Southeastern Brazil (from Cox, 1989 and Potter, 1997).

Fig. 14 in Revision of the South American freshwater fish genus Laemolyta Cope, 1872 (Ostariophysi: Characiformes: Anostomidae)

Fig. 14. Laemolyta garmani named "Laemolyta garmani macra", MHNG 2197.38, 71.1 mm SL; Peru, río Marañon, Concordia, tributary of río Nucuray. Caudal fin damaged.

opencc-by-4.0Jun 2006View details →

Fig. 2 in Tectonic history and the biogeography of the freshwater fishes from the coastal drainages of eastern Brazil: an example of faunal evolution associated with a divergent continental margin

Fig. 2. The South American Plate and its major tectono-sedimentary domains (from Milani & Thomaz-Filho, 2000).

Fig. 3 in A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes

Fig. 3. The sit-and-wait foraging posture of "Imparfinis" pristos in dorsal view. Note translucent body and commashaped pupil.

Fig. 2 in A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes

Fig. 2. The sit-and-wait foraging posture of Mastiglanis asopos in posterior view. Note very long barbels and filamentous rays of pectoral fins spread in a drift trap-like device, as well as the alignment of mentonian barbels and pectoral filaments.

Fig. 1 in A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes

Fig. 1. Two species indicative of the morphological and behavioural variation found among the sand-dwelling fish assemblage in an Amazonian streamlet: a, the diurnally active Characidium cf. pteroides in its characteristic sit-and-wait posture while foraging for bottom-dwelling prey; b, the nocturnally active Gymnorhamphichthys rondoni in its typical headdown posture while actively searching for interstitial prey.

opencc-by-4.0Oct 2022View details →

A deep learning dataset for underwater object detection of tropical freshwater fish species in northern Australia

This dataset includes 44,112 images with 82,904 bounding box annotations for 23 tropical freshwater fish taxa from northern Australia.  Images were derived from Remote Underwater Video (RUV) deployments in deep channel and shallow lowland billabongs, Kakadu National Park, Northern Territory Australia. RUV deployments were conducted during the <a href="https://www.dcceew.gov.au/science-research/supervising-scientist">Supervising Scientists</a> annual fish monitoring program in the 2016, 2017 and 2018 recessional flow period (dry season). More information can be found <a href="https://www.dcceew.gov.au/sites/default/files/documents/ss-atr-2020-21.pdf">here</a>. <ul> <li>All images are in .jpg format and are 1920x1080 in dimension.</li> <li>Bounding box annotations are in COCO format. </li> </ul> Two .zip files are included: <ul> <li><a href="https://zenodo.org/api/files/990412db-e633-4f82-9b32-6990ef439ccd/202210-KakaduFishAI-CompactModel.zip">202210-KakaduFishAI-CompactModel.zip</a>: includes compact model weights in tensorflow format (.pb) trained using Azure's Custom Vision platform. This model is suitable for edge devices due to its reduced size. Code is provided to use the compact model for inferencing. </li> <li> <a href="https://zenodo.org/api/files/990412db-e633-4f82-9b32-6990ef439ccd/202210-KakaduFishAI-TrainingData.zip">202210-KakaduFishAI-TrainingData.zip</a>: includes all images and one COCO (.json) file with annotations. </li> </ul> Fish taxa include:  <ol> <li>Ambassis agrammus</li> <li>Ambassis macleayi</li> <li>Amniataba percoides</li> <li>Craterocephalus stercusmuscarum</li> <li>Denariusa bandata</li> <li>Glossamia aprion</li> <li>Glossogobius spp.</li> <li>Hephaestus fuliginosus</li> <li>Lates calcarifer</li> <li>Leiopotherapon unicolor</li> <li>Liza ordensis</li> <li>Megalops cyprinoides</li> <li>Melanotaenia nigrans</li> <li>Melanotaenia splendida inornata</li> <li>Mogurnda mogurnda</li> <li>Nemetalosa erebi</li> <li>Neoarius spp.</li> <li>Neosilurus spp.</li> <li>Oxyeleotris spp.</li> <li>Scleropages jardinii</li> <li>Strongylura kreffti</li> <li>Syncomistes butleri</li> <li>Toxotes chatareus</li> </ol> If you use this data for your own deep learning project we'd love to hear about how you used this dataset: andrew.jansen@environment.gov.au.

Fig. 47 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 47. Poecilia sphenops (melanistic variety), Lam Tsuen River, note damaged dorsal fin, photographed by Chun Hin Wan.

Fig. 53 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 53. Distribution of non-native freshwater fish species in Hong Kong. Each record was location and species-specific, which means that multiple records of one species in the same locality were represented only once in the heatmap. In total there are 999 locality records for 93 species (two species have unknown distribution) and five hybrids.

Fig. 52 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 52. First records of non-native freshwater fish species from 1930 to 2022 and their suspected introduction sources.

Fig. 48. Xiphophorus hellerii, 34.8 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 48. Xiphophorus hellerii, 34.8 mm SL female (top), 35.1 mm SL male (middle), Wong Lung Hang Stream, 38.8 mm SL redvariety male (bottom), Tai Po Kau Nature Reserve.

Fig. 59 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 59. Gobiopterus cf. macrolepis, non-native specimen (top), Tai Lam Chung Reservoir, native specimen (female with eggs) (bottom), Kam Tin River.

Fig. 46. Poecilia salvatoris, 30 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 46. Poecilia salvatoris, 30 mm SL female (top), Lam Tsuen River, 30 mm SL male (bottom), Sam Dip Tam Stream.

Fig. 43. Gambusia affinis, 23.9 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 43. Gambusia affinis, 23.9 mm SL female (top), Lam Tsuen River, 18.2 mm SL male (bottom), Lin Au Stream.

Fig. 8. Cyprinus carpio wild type, 307 in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 8. Cyprinus carpio wild type, 307 mm SL, Tai O River (top), ornamental variety, 596mm SL, Shing Mun Reservoir (bottom).

Fig. 22. A in The non-native freshwater fishes of Hong Kong: diversity, distributions, and origins

Fig. 22. A, Channa argus, Ng Tung River, Channa maculata, B1, (dorsal head pattern), B2, (lateral pattern), She Shan River (uncertain origin), Channa argus × Channa maculata hybrid, C1, (dorsal head pattern), C2, (lateral pattern), Ng Tung River.

opencc-by-4.0Oct 2022View details →

Increasing stability of a native freshwater fish assemblage following flow rehabilitation

Stream restorations are increasingly critical for managing and recovering freshwater biodiversity in human-dominated landscapes. However, few studies have quantified  how rehabilitative actions promulgate through aquatic communities over decades.  Here, a long-term dataset is analyzed for fish assemblage change, incorporating data pre- and post-restoration periods, and testing the extent to which native assemblage stability increased over time. In the late 1950s, a large capacity dam was installed on Putah Creek (Solano County, CA, USA) which altered the natural flow regime, channel structure, geomorphic processes, and overall ecological function. Notably, downstream flows were reduced (especially during summer months) resulting in an aquatic assemblage dominated by warmwater nonnative species, while endemic native species subsisted at low levels as subordinates. A court-mediated Accord was ratified in 2000 providing a more natural flow regime, specifically for native and anadromous fishes in the stream. Richness of nonnative species decreased at every site following the Accord, while richness of native species increased or stayed constant. At the three most upstream sites, native species richness increased over time and ultimately exceeded nonnative richness. Native assemblage recovery was strongest upriver, closer to flow releases and habitat restoration activities, and decreased longitudinally downstream. Rank-abundance curves through time revealed that while species evenness was low throughout the study, dominance shifted from nonnative to native species in the upstream sites coincident with rehabilitation efforts. Mean rank shifts decreased following flow rehabilitation; thus the assemblage became increasingly stable over time following flow rehabilitation. Putah Creek’s rehabilitation may represent a model for others interested in improving endemic freshwater communities in degraded ecosystems.