Estrutura Populacional, Relação Peso-Comprimento e Fator de Condição de Hoplosternum littorale, Hancock, 1828 (Siluriformes: Callichthyidae) da Área de Proteção Ambiental do Rio Curiaú, Macapá-AP

Oliveira, Júlio César Sá de; Chellappa, Sathyabama; Vasconcelos, Huann Carllo Gentil

doi:10.18561/2179-5746/biotaamazonia.v1n1p38-41

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Native. Breeding takes place at the beginning of the wet season (Oliveira 2000); females deposit eggs in a bubble nest built by the male from saliva and bits of vegetation at the water surface; male guards the nest (Ramnarine 1990). Omnivore.…”

Section: Callichthys Callichthys (Linnaeus 1758) [Flat-head Cascadu mentioning

confidence: 99%

Annotated list and key to the stream fishes of Trinidad & Tobago

Phillip¹,

Taphorn²,

Holm³

et al. 2013

Zootaxa

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Section: Callichthys Callichthys (Linnaeus 1758) [Flat-head Cascadu mentioning

confidence: 99%

Annotated list and key to the stream fishes of Trinidad & Tobago

Phillip¹,

Taphorn²,

Holm³

et al. 2013

Zootaxa

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“…45 Furthermore, these fish have great commercial value because the riverside population commonly uses them as a food source. [46][47][48] The adaptability of the tamoatá may be partly related to its heterochromatin composition and location, which may be differentially organized according to the environment in which the individual lives. Three patterns of heterochromatin distribution from different regions of Brazil and Venezuela are found: (a) centromeric and interstitial blocks 44,49,50 ; (b) subterminal and interstitial blocks 51 ; and (c) centromeric, pericentromeric, and interstitial blocks.…”

Section: Introductionmentioning

confidence: 99%

Genomic Organization Under Different Environmental Conditions:Hoplosternum Littoraleas a Model

et al. 2016

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The Amazon has abundant rivers, streams, and floodplains in both polluted and nonpolluted environments, which show great adaptability. Thus, the goal of this study was to map repetitive DNA sequences in both mitotic chromosomes and erythrocyte micronuclei of tamoatás from polluted and nonpolluted environments and to assess the possible genotoxic effects of these environments. Individuals were collected in Manaus, Amazonas (AM), and submitted to classical and molecular cytogenetic techniques, as well as to a blood micronucleus test. Diploid number equal to 60 chromosomes are present in all individuals, with 18S ribosomal DNA sites present in one chromosome pair and no interstitial telomeric sites on chromosomes. The micronucleus test showed no significant differences in pairwise comparisons between environments or collection sites, but the Rex3 retroelement was dispersed on the chromosomes of individuals from unpolluted environments and compartmentalized in individuals from polluted environments. Divergent numbers of 5S rDNA sites are present in individuals from unpolluted and polluted environments. The mapping of repetitive sequences revealed that micronuclei have different compositions both intra-and interindividually that suggests different regions are lost in the formation of micronuclei, and no single fragile region undergoes breaks, although repetitive DNA elements are involved in this process.

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“…The electric eel (Electrophorus electricus) spawns during the late dry season, between September and December (Assunção & Schwassmann, 1995), while Hoplosternun littorale spawns at the beginning of the rainy season, i.e. January and February (Oliveira, 2000). This species builds nests in the flooded vegetation and presents parental care.…”

Section: Environmental Patternsmentioning

confidence: 99%

Environmental Assessment and Aquatic Biodiversity Conservation of Amazonian Savannas, Marajó Island, Brazil

Montag¹,

Freitas²,

Mendes‐Oliveira³

et al. 2011

Research in Biodiversity - Models and Applications

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Marajó Island is located in the mouth of the Amazon River, the World's largest river, at its interface with the Atlantic Ocean (Goulding et al., 2003). Marajó is the World's largest riverine island (Cruz, 1987), with a total area of approximately fifty thousand square kilometers (Fig. 1). In addition to the Amazon, the island is also influenced by the Tocantins River and other small rivers of the south (Barthem & Schwassmann, 1994; UNEP, 2004). The island is surrounded by sandy-clayey beaches, and encompasses a hydrographic system (rivers, channels, and creeks) which both drains and floods the terra firme forest and várzeas (swamps) (Marques-Aguiar et al., 2002). In addition to these forest ecosystems, the island's lakes, lagoons, beaches, rivers, and mangroves contribute to its diversity of habitats and organisms (Marques-Aguiar et al., 2002; Montag et al., 2009; Almeida et al., 2009). This diversity of habitats influences the richness of the region's fauna, including its fish, and plays an important role in habitat preferences and use (Lowe-McConnell, 1999; Carrier et al., 2004). Most of these environments are heavily influenced by the inundation cycle of the estuarine region, which Junk (1997) characterizes as a polymodal cycle of low amplitude, but highly predictable flood pulses, influenced primarily by the local tides. The climate of Marajó Island can be characterized by two categories of the Köppen classification system-Af (humid tropical, with mean precipitation in the driest month at least 60 mm) and Am, tropical monsoon, with excessive rainfall between February and May. During this period, two-thirds of the island are completely flooded (Cardoso & Pereira, 2002; Lima et al., 2005; Fig. 1). Annual precipitation on Marajó Island ranges between 2500 mm and 4000 mm, with a mean temperature of around 27ºC, and relative humidity of 81% to 94%. Rainfall is distributed in two distinct periods, with a marked rainy season between January and June, and a dry season, between September and November. Despite this rigorous hydrological regime, the vegetation covering the part of the island that is flooded annually is referred to as a savanna (or flooded grassland; Fig. 2), which is known for the diversity and abundance of its fishery resources (Barthem & Fabré, 2003; Montag et al., 2009; Schaan, 2010). While the term savanna is more associated with specific floristic characteristics, comparable with those of the savannas of central Brazil (Eiten, 1972; Ratter et

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Estrutura Populacional, Relação Peso-Comprimento e Fator de Condição de Hoplosternum littorale, Hancock, 1828 (Siluriformes: Callichthyidae) da Área de Proteção Ambiental do Rio Curiaú, Macapá-AP

Cited by 4 publications

References 3 publications

Annotated list and key to the stream fishes of Trinidad & Tobago

Annotated list and key to the stream fishes of Trinidad & Tobago

Genomic Organization Under Different Environmental Conditions:Hoplosternum Littoraleas a Model

Environmental Assessment and Aquatic Biodiversity Conservation of Amazonian Savannas, Marajó Island, Brazil

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Estrutura Populacional, Relação Peso-Comprimento e Fator de Condição de Hoplosternum littorale, Hancock, 1828 (Siluriformes: Callichthyidae) da Área de Proteção Ambiental do Rio Curiaú, Macapá-AP

Cited by 4 publications

References 3 publications

Annotated list and key to the stream fishes of Trinidad &amp; Tobago

Annotated list and key to the stream fishes of Trinidad &amp; Tobago

Genomic Organization Under Different Environmental Conditions:Hoplosternum Littoraleas a Model

Environmental Assessment and Aquatic Biodiversity Conservation of Amazonian Savannas, Marajó Island, Brazil

Contact Info

Product

Resources

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Annotated list and key to the stream fishes of Trinidad & Tobago

Annotated list and key to the stream fishes of Trinidad & Tobago