Victor Emmanuel Lopes da Silva

Universidade Federal de Alagoas · Institute of Biological Sciences and Health (ICBS)

Based on the assumption that rare species in estuarine systems may display a different set of traits relative to common species, we hypothesized that the extirpation of rare species would negatively affect functional diversity components of these ecosystems. Therefore, the contribution of rare species to the functional structure of estuarine fish a...

The morphology and morphometry of otoliths have emerged as powerful indicators of ecological characteristics of fishes. However, shape descriptors that can accurately predict well-documented functions played by species in tropical ecosystems are either restricted to a few groups or poorly known. Therefore, we evaluated the power of two otolith shap...

Coastal habitat mosaics are among the most productive ecosystems around the globe, with many ecological and social-economic services provided. Their natural challenging conditions have always been a subject of concern for ecologist and conservationist, with a particular interest in understanding how its spatial and temporal dynamics influence ecosy...

The identification of patterns in habitat use by fish guilds may provide an integrated perspective of coastal mosaics. Thus, we used multivariate analyses to assess the relative importance of habitat types for fish guilds based on density and species composition throughout a seasonal event in the northeastern coast of Brazil. Our results showed a g...

Coastal marine ecosystems have structural and functional features usually connected by the seasonal transfer of nutrients and organisms. These environments can utilize inter-ecosystem subsidies to increase resilience and maturity and support human activities like fishing. However, the importance of the connection and the role of the seasonal pulse...

Context. Disentangling mechanisms influencing the seasonal and spatial distribution of fish is essential to understanding population dynamics. In the southwestern Atlantic, the sympatric mullets Mugil curema and M. rubrioculus are closely related and use habitat similarly. However, which processes allow their coexistence is unknown. Aims. We tested...

This study provides insights into the intricate dynamics of coastal muddy bottoms within tropical regions spanning from the Amazon to the São Francisco River estuary. Through species analysis, distinct species pools distributed across the Tropical Atlantic have been identified, revealing diverse patterns in fish biodiversity that transcend mere spe...

The damming in a watershed alters all its fluvial dynamics, affecting the patterns of occurrence and distribution of the fish community. Despite being an important refuge for fish communities in tropical Brazil, the river-estuarine continuum is strongly affected by human activities that have considerably disturbed the natural dynamics. In this stud...

The white mullet, Mugil curema, is a commercially important species in coastal areas, with a large phenotypic variability and genetic dissimilarity among populations throughout its distribution. For management purposes it is important to determine whether the morphological variability reflects the genetic differences among groups. This study evalua...

Coastal and oceanic ecosystems have their own structural and functional dynamics, but they are typically connected by the transfer of nutrients and organisms. These organic matter and energy flows mean these environments function as a meta-ecosystem. In the tropics, the transfers between estuaries and the neritic ecosystems or nearshore can be driv...

We investigated the effects of urbanization on the population characteristics of Eriphia gonagra found on sandstone reefs between tides. Sampling was carried out from September 2015 to August 2016 in two sandstone reefs with different degrees of urbanization. Environmental parameters were retrieved for both reefs and collected individuals were meas...

We modeled carapace length in relation to species total length using two distinct methods: the power function of Huxley and an expansion of this method. We found evidence that Macrobrachium amazonicum has a polyphasic allometry and growth pattern may be associated to species reproduction. Key words: Amazon River prawn; relative growth; Huxley func...

Marine shrimp fishing is an economic activity of global importance due to its high profitability, but it also presents several environmental and socioeconomic problems. In a context of increasing need for fishery sustainability, scientific basis supporting fishery resources management is essential. However, evidence-based information is frequently...

Background. Reproductive aspects of fishes are very useful in the development of management and conservation strategies of stocks. The information available on this subject, however, is very limited for tropical species, especially for those with low economic value, such as the barred grunt, Conodon nobilis (Linnaeus, 1758). This species is a commo...

Otólitos atuam como registro permanente da história de vida dos peixes, sendo utilizados em estudos de crescimento, idade da primeira maturação, longevidade e migração. Tais informações são necessárias para o manejo e conservação de espécies ictiícas, principalmente as de valor comercial, como os mugilídeos. Os mugilideos possuem importância releva...

Otólitos podem refletir aspectos do ciclo de vida dos peixes, como mudanças ontogenéticas e variações no crescimento. No ciclo de vida dos robalos é esperado hermafroditismo protândrico. Assim, formulamos a pergunta: Existem mudanças morfométricas e morfogeométricas no crescimento do otólito de Centropomus undecimalis e Centropomus parallelus, do N...

OBJECTIVE: To evaluate the sleep quality of primary caregivers of children with microcephaly that receive treatment in a public health facility.METHODS: This is a transversal, descriptive and quali-quantitative study. Ten informal primary caregivers of children with microcephaly from a public health facility in Alagoas were interviewed one-on-one f...

One of the core challenges of functional diversity is the identification of traits that can accurately be linked to ecological processes. Trait-based metrics have been used to detect and quantify the effects of deterministic processes, such as niche filtering and co-occurrence mechanisms. However, most functional studies have simplified the measure...

Reproductive aspects of the longnose stingray, Hypanus guttatus (Bloch & Schneider, 1801), from the northeastern Brazil were estimated from 634 individuals (366 females and 268 males). Sexual dimorphism was found for the species with females reaching larger sizes than males. Females and males reached sexual maturity at 67.1 ± 6.2 and 61.0 ± 4.3 cm,...

Assessing patterns in habitat utilization and changes in the composition of biont assemblages is a key tool for efficient ecosystem conservation planning and management. Nevertheless, habitat use patterns by juvenile fish still need more comprehension. Therefore, the presently reported study investigated relations between the type of nursery ground...

In fishery biology, information on life-history traits is extremely useful for species conservation and the monitoring, management and sustaining of fish stocks. Nevertheless, detailed biological information is very limited for tropical fishes, especially for those with low economic value, such as the Atlantic bumper, Chloroscombrus chrysurus (Linn...

This study provides separate length–weight relationships (LWRs) for males, females and pooled individuals for four stingray species (Dasyatis guttata, Dasyatis marianae, Gymnura micrura, and Rhinoptera bonasus) found in the tropical Atlantic. The specimens were sampled monthly between April 2009 and February 2011 along the coast of Alagoas, northea...

Length-weight relationships were estimated for two mugilid species from estuarine systems in Alagoas, northeastern Brazil. Fish were sampled monthly using nylon monofilament gillnets with different mesh sizes during two fishery surveys. The first LWR reference for Mugil curvidens and new maximum lengths for both M. rubioculus and M. curvidens are p...