Stream Fish in the Aripuanã River Upstream and Downstream of the Dardanelos-Andorinhas Waterfall Complex, State of Mato Grosso, Brazil

Silva, Hugmar Pains da; Zawadzki, Cláudio Henrique; Lourenço, Luzia da Silva; Fernandes, Izaías Médice

doi:10.4257/oeco.2019.2303.17

Cited by 3 publications

(2 citation statements)

References 22 publications

(33 reference statements)

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“…Considering that Aripuanã and river Juruena belong to different ecoregions, it is likely to presume that events at regional scale can be the primary driver for the differences observed in this study. Indeed, a recent study has revealed that the Biota Neotrop., 20 (1) Dardanelos and Andorinhas waterfall complex is an important barrier for the fish fauna in the Aripuanã river basin (Silva et al 2019).…”

Section: Discussionmentioning

confidence: 99%

Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil

et al. 2020

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The replacement of tropical forests to production systems is one of the leading causes of riverine ecosystem alterations. However, current assemblages’ composition may also result from the time since these transformations have begun. Therefore, the knowledge of diversified historical scenarios can facilitate the accomplishment of actions that involve the aquatic environments recovery. In this study, an inventory of stream fish was carried out in basins whose deforestation was intensified in the last 20 years, to compose a baseline for ecological and taxonomic studies. The habitat, physical and chemical variables, and the fish assemblages from 60 streams in the northwest region of the state of Mato Grosso, in the Aripuanã and Juruena river basins, were sampled with standardized procedures. For a total of 130 species, a numerical predominance of small-sized Characidae and great rarity were registered, with 50 species represented by less than ten individuals and 19 singletons. Approximately 15% of the sampled taxa were identified only at the generic level, and for several taxa, more detailed taxonomic and molecular studies are required in order to achieve satisfactory identifications. None threatened species were so far reported. On the other hand, two specimens of non-native species were sampled. Although habitat quality is higher in forested streams, no differences in the species richness were registered when compared to the pasture with riparian forest streams or to more deforested streams. However, abundance was greater in these last two streams groups as a result of small-sized characins dominance.

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Section: Discussionmentioning

confidence: 99%

Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil

et al. 2020

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“…É comum que os riachos de uma mesma bacia possuam subconjuntos distintos de espécies, o que resulta da combinação de fatores ecológicos e históricos (p. ex., Ohara & Loeb 2016, Silva et al 2019. Por isso, nem sempre é possível construir um único IBI para uma bacia como um todo (apesar de esta ser a escala desejada), pois, por vezes essa variabilidade é bastante grande e deve ser respeitada na construção do índice.…”

Section: Conclusãounclassified

Avaliação Da Integridade Biótica De Riachos a Partir Da Ictiofauna

Casatti¹,

Ortigossa²

2021

Oecol. Aust.

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Almost four decades ago, ecologist James R. Karr published the first version of the Index of Biotic Integrity (IBI) to assess the health of aquatic ecosystems from fish assemblages. Since then, numerous adaptations, criticisms, and reinterpretations have emerged from this seminal study, covering diverse world biomes. In Brazil, the first versions of IBI for streams were developed in the South (in 2004). Over time, scientific production on this topic has shown a significant increase in the complexity of the approaches and methods used, mainly due to the advance in the basic knowledge about stream fish diversity, ecology, and biology. These studies include, for example, tests of metrics already proposed, proposals for new metrics, adaptations for different basins, and tests of the ecological responses of the ichthyofauna to different human-originated impacts. Even so, there are no standardized protocols for defining the metrics, nor for the introduction of these indexes in the stream monitoring routine. The objective of this article is to present a theoretical framework on the development of IBI for Brazilian streams, based on ichthyofauna, to discuss whether it is possible and feasible to standardize protocols for the development of IBIs and the prospects of applicability in Brazilian streams.

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Description of a new species of Cyphocharax from the rio Juma, rio Aripuanã basin, southern Amazon basin (Teleostei: Curimatidae)

Melo,

Faria

2024

Neotrop. ichthyol.

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A new species of Cyphocharax is described from the rio Juma, which flows across the meridional Amazon basin and is a tributary of the rio Aripuanã in the rio Madeira fluvial system. Features distinguishing the new species from congeners include a longitudinally elongated caudal peduncle blotchextending from the vertical line through the adipose-fin terminus to the base of median caudal-fin rays, the number of scale series along the lateral line and between the lateral line and dorsal-fin origin, morphometric variation, and the patterns of pigmentation along the body. The species was discovered in a lesser-explored region and appears to be an endemic of the rio Aripuanã in the southern Amazon basin.

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Stream Fish in the Aripuanã River Upstream and Downstream of the Dardanelos-Andorinhas Waterfall Complex, State of Mato Grosso, Brazil

Cited by 3 publications

References 22 publications

Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil

Stream fish from recently deforested basins in the Meridional Amazon, Mato Grosso, Brazil

Avaliação Da Integridade Biótica De Riachos a Partir Da Ictiofauna

Description of a new species of Cyphocharax from the rio Juma, rio Aripuanã basin, southern Amazon basin (Teleostei: Curimatidae)

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