A5064199074- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Soil and Land Suitability Analysis
- Soil erosion and sediment transport
- Climate Change and Sustainable Development
- Aquatic Ecosystems and Biodiversity
Universidade Federal de Lavras
2011-2012
Universidade Estadual de Londrina
2008
Abstract Biotelemetry, ichthyoplankton and genetic data can provide detailed information about the migratory dynamics reproductive cycle of freshwater fishes. However, few studies have combined these techniques in Neotropical systems. The objective this study was to examine Prochilodus costatus São Francisco River watershed, south‐east Brazil, by comparing ecological importance two rivers species, an undammed segment a dammed one its main tributaries, Pará River. In total, 215 fish were...
The objective of this study was to evaluate the passage fish eggs and larvae through Funil, Itutinga Camargos Reservoirs, located in upper Rio Grande basin, Minas Gerais, Brazil. Samples were taken downstream upstream dams using a conical ichthyoplankton net collected every two weeks, twice per sampling day, between November 2008 March 2009. Although abundant immediately reservoirs, no captured dams, possibly indicating that do not pass reservoirs. arrival reservoirs without its effective...
Abstract The influence of abiotic factors on ichthyoplankton occurrence was assessed in lotic stretches with and without dams the Grande River basin from November 2008 to March 2009. Water transparency temperature were main that influenced temporal variation unregulated stretches. On other hand, best predictors regulated sites water time day. catch significantly greater at low during night‐time areas downstream dams, which may be attributed either adaptive behaviour fish species favouring...
Abstract Fish attempting to move upstream through hydroelectric dams can be trapped and killed in turbines. Understanding fish movement patterns provide useful insights for how manage dam operations minimize kill We evaluated the movements of two migratory (Curimba— Prochilodus argenteus Mandi— Pimelodus maculatus ) using acoustic telemetry tailrace Três Marias Dam (São Francisco River, Brazil) from 31 October 2011 16 February 2012. The majority tagged left less than one week; however, some...
In South America, knowledge of major spawning sites is crucial for maintaining migratory fish populations. this study, we aimed to understand the spatio-temporal distribution eggs in upper São Francisco River using high sampling frequency and DNA metabarcoding identification. We evaluated possible effects non-molecular identification decreased on determination breeding periods. Collections were carried out every three days from November 2019 February 2020. found that, if had assumed that all...
Foi observado o comportamento de formação cardumes Astyanax altiparanae Garutti & Britski, 2000 no subafluente do médio rio Paranapanema, durante período janeiro 1997 a fevereiro 1998. constatado que essa espécie forma basicamente dois tipos cardumes: os maiores (aproximadamente 50 indivíduos) formados pelos menores espécimes e localizando-se à margem, entre vegetação aquática; enquanto (cerca 15 indivíduos), por maiores, localizam-se, preferencialmente, em áreas mais profundas. Foram...
To study the reproductive dynamics of mandi-beiçudo, Iheringichthys labrosus , in Capivara Reservoir, Paranapanema River, Parana, Brazil, specimens were captured trimonthly from March 2001 to July 2004 at four sampling sites. The sex ratio showed a predominance females most months sampled and larger length classes. majority individuals standard between 16 22 cm, with maximal 27.5 cm. size first maturity was estimated be 18.1 19.7 cm for males, respectively. Analysis temporal variation...
The Neotropical region exhibits a remarkable diversity of freshwater fish, with the Upper Grande River in La Plata basin emerging as significant yet underexplored hotspot. However, this is confronted escalating threats from human activities, such hydroelectric damming and urbanization, which jeopardize its ichthyofauna. This research conducted comprehensive inventory ichthyofauna River, covering diverse environments sub-basins. Fish sampling at 185 sites revealed over 94 species, indicating...