Bruno Sampaio Sant'Anna- Dr
- Associate Professor at Federal University of Amazonas
Bruno Sampaio Sant'Anna
- Dr
- Associate Professor at Federal University of Amazonas
Associate Professor at Federal University of Amazonas
Itacoatiara, Brazil
About
75
Publications
18,579
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734
Citations
Introduction
Current institution
Additional affiliations
December 2011 - present
Position
- Associate Professor
Description
- Development of research in zoology and ecology of aquatic organisms such as molluscs, crustaceans and amphibians. In addition to teaching classes in undergraduate courses in Science and Pharmacy.
Publications
Publications (75)
This study investigated the behaviour of Pomacea bridgesii, describing the daily activity, substrate selection and the influence of the flood regime in the Amazon, the species’ native habitat. The present study described the daily activity and substrate selection, and evaluated the activity adaptations of the gastropods in a simulated flood-pulse r...
To understand sperm plug dissolution and spermatophore dehiscence in Portunidae, histological and ultrastructural changes in the seminal receptacle (SR) of Arenaeus cribrarius were investigated during ovarian development. In juvenile females the SR was filled with acid polysaccharides and the dorsal epithelium was stratified. Mated females with rud...
Ucides cordatus is the most commercially important mangrove crab in Brazil. In spite of its economic
importance, there are few studies of its reproduction, in particular the female reproductive system. The present study describes the histology and histochemistry of the spermathecae of U. cordatus. Adult females were caught monthly from July 2004 th...
Few studies in the Amazon region have evaluated anuran diversity in urban forest fragments or in areas with differing degrees of anthropogenic impact. We determined the composition and abundance of the anurofauna in urban and rural sites within the municipality of Itacoatiara in central Amazonia, Brazil. Specimens were sampled from January 2012 to...
Investigating feeding patterns among species is essential to understanding and preserving populations, especially in habitats like the Amazon. This study analyzed the patterns of food resource use of two coexisting species of Hylidae, Boana geographica and B. raniceps, in Central Amazonia, Brazil. High trophic niche overlap (0.74) and differences i...
Microplastics are practically ubiquitous contaminants in all environments on the planet. Therefore, the present work aimed to investigate microplastic contamination in lettuce, chives, and cilantro sold in Itacoatiara, Central Amazon, Brazil. Samples of each vegetable were acquired from different commercial establishments. The samples were washed w...
Urbanization is an important cause of biotic homogenization around the world. However, the relationship between fauna homogenization and urbanization has yet to be properly investigated in cities located in species-rich tropical regions. Here we investigated taxonomic, phylogenetic and functional homogenization on anuran assemblages of urban and ru...
Growing global concern surrounds microplastics, found in various environments. However, data on microplastics contamination in salted shrimp and associated health risks remain scarce. We analyzed whether salted shrimps sold in markets in a main city in Amazonas state (Brazil), are contaminated with microplastics. We examined 150 specimens of Macrob...
This study evaluated the presence of plastics and microplastics in macrophytes in an urbanized sector of the Amazon River. A total of 77 quadrats in 23 macrophyte banks were sampled during the dry (September 2020) and rainy (June 2021) season. Five species were identified: Paspalum repens, Pontederia rotundifolia, Pistia stratiotes, Salvinia auricu...
Contamination by microplastics (MPs)
has been recorded in various environments and organisms around the world. The objective of this study was to investigate the occurrence of MPs in two species of Siluriformes fshes Pterygoplichthys par-
dalis and Hoplosternum littorale considering the sex and diferent body parts of fsh captured in Amazon foodpla...
Due to the visible abundance of plastic improperly disposed of in the environment, the number of investigations has increased worldwide in different water bodies and biota. Despite this, studies of contamination by microplastics in freshwater environments in the Amazon are scarce. This study investigated microplastic contamination in sediment sampl...
Abstract: The aim of this study was to investigate the diet of Rhinella marina by comparing the availability of food in its environment with its actual diet, and verify whether there is a relationship between the size and volume of its prey and the size of the toad and the width of its mouth. A total of 43 toads (95.55%) presented food items in the...
Abstract: The aim of this study was to investigate the diet of Rhinella marina by comparing the availability of food in its environment with its actual diet, and verify whether there is a relationship between the size and volume of its prey and the size of the toad and the width of its mouth. A total of 43 toads (95.55%) presented food items in the...
The present study analyzed the presence of microplastics (MPs) in the shrimp Macrobrachium amazonicum, which is an economically important food that is consumed in several regions of the Brazilian Amazon. A total of 600 specimens of M. amazonicum were captured at two sampling sites (urban and rural area). A total of 2597 MP particles were recorded i...
The present work investigated the meat yield of the gastropod Pomacea dolioides (Reeve, 1856), and sensorially evaluated its main organoleptic properties. The average meat yield of P. dolioides was 11.9 ± 3.4%, of which 10.9 ± 3.3% was for young females, 12.5 ± 2.8% for adult females, 12.1 ± 4.2% for young males, and 12.4 ± 2.2% for adult males. No...
Crabs use burrows to prevent predation, environmental interference and shelter. The present study investigated the excavation behavior of the trichodactylid crab Dilocarcinus pagei, considering the biometric aspects of the burrows, the excavation time, the amount of bioturbation and the excavation behavior of the two sexes. The burrows of males had...
The relationship between color and size supports the hypothesis that color is an important signal for some crab species during mating rituals or agonistic interactions. Thus, the objective of this study was to describe the color variation of D. pagei and its relationship with sex and sexual maturity. The crabs were placed on a surface for photograp...
This study investigated the predation of eggs of the apple snail Pomacea dolioides in Itacoatiara, Amazonas, Brazil. Predation was compared between rural and urban areas, period of day, shaded and unshaded clutches. In addition, we evaluated clutch height and the behaviour of predators. Between April 2017 and July 2018, 962 egg clutches were observ...
This study investigated the resistance to desiccation of two species of freshwater crabs, Dilocarcinus pagei and Sylviocarcinus pictus. Dilocarcinus pagei survived almost twice as long as S. pictus, 127 ± 82.4 h and 69 ± 17.5 h, respectively. The females of both species survived longer than the males and the females of D. pagei survived longer than...
This study evaluated the biomass gain, specific growth rate, absolute weight gain, and survival rate of the gastropod Pomacea dolioides cultivated in different stocking densities. To perform the experiment, samples were collected in March and June 2015. A total of 40 adult specimens were collected in the Jauary neighborhood (03°08'19.9"S, 58°27'32....
The population structure and reproduction of Macrobrachium brasiliense were studied with the aim of better understanding the ecology of this species in relation to the Amazonian flood-pulse regime. A total of 3,306 animals were caught monthly from August 2011 to July 2013 at the Carú River, Itacoatiara, Amazonas State (Brazil). The average carapace...
Obtaining accurate and reproducible estimates of internal shell volume is a vital requirement for studies into the ecology of a range of shell-occupying organisms, including hermit crabs. Shell internal volume is usually estimated by filling the shell cavity with water or sand, however, there has been no systematic assessment of the reliability of...
The bioecology of freshwater prawns can be understood by studying their reproductive biology. Thus, the aim of this paper was to determine and compare the reproductive potential of four freshwater caridean prawns collected in the Amazon region. For two years, we captured females of Macrobrachium brasiliense, Palaemon carteri, Pseudopalaemon chryseu...
The Amazon forest is one of the world's most complex, unknown and threatened ecosystems that holds a considerable part of the Earth’s biodiversity. This ecosystem needs greater scientific attention so that we can better understand the features of its fauna and conserve species before they become extinct. Thus, this book addresses issues about resou...
The periodic variation in the water level of the Amazon basin is the main
factor that determines the composition of the community of aquatic
organisms due to cyclical changes. As the dry season in the Amazon
region may vary according to environmental conditions that change from
year to year, this study tested the hypothesis that long dry periods ma...
Imposex is an abnormality resulting from endocrine disorders causing
masculinization with penis and vas deferens development
in female neogastropods exposed to contamination by organotin
compounds. The goal of this study was to verify the occurrence of
imposex in two gastropod species of the Pomacea genus: Pomacea
dolioides (Reeve, 1856) and Pomace...
This study investigated the reproductive aspects associated with the
fecundity of the gastropod Pomacea diffusa. The gastropods were
collected in Itacoatiara, AM, Brazil, in the neighborhoods of Jauary,
Centenário and Eduardo Braga, with different degrees of human
disturbance. For the analyses of oviposition time, female size and
fecundity, 100 gas...
Gastropods of the Ampullariidae family are among the largest freshwater
snails. They are appreciated in cooking in many countries and culture
experiments have been developed with some species. This study will
determine the growth and fattening of Pomacea dolioides (Reeve, 1856)
in their juvenile stage with different diets and feeding frequencies. T...
This study investigated the reproduction and substrate selection for
oviposition of the apple snail Pomacea dolioides. Overall, the average
size of studied individuals was 44.29 ± 12.42 mm for females and 42.42 ±
9.42 mm for males, without any significant difference. Regarding the
partners, analyzing the size of each couple, females were larger tha...
This study investigated the reproductive aspects associated with the fecundity of the gastropod Pomacea diffusa. The gastropods were collected in Itacoatiara, AM, Brazil, in the neighborhoods of Jauary, Centenário and Eduardo Braga, with different degrees of human disturbance. For the analyses of oviposition time, female size and fecundity, 100 gas...
This study investigated the reproduction and substrate selection for oviposition of the apple snail Pomacea dolioides. Overall, the average size of studied individuals was 44.29 ± 12.42 mm for females and 42.42 ± 9.42 mm for males, without any significant difference. Regarding the partners, analyzing the size of each couple, females were larger tha...
The survival and reproductive success of hermit crabs is intrinsically linked to the quality of their domicile shells. Because damaged or eroded shells can result in greater predation, evaluating shell structure may aid our understanding of population dynamics. We assessed the structural attributes of Cerithium atratum shells through assessments of...
Biodiversity loss can occur directly or indirectly in the medium and long term due to hydropower installation and operation. As Winemiller et al. (2016) highlight, large dams delay and attenuate seasonal flood pulses. The alterations in the flood pulse modify the range of water to regions that seasonally flood, in time and space. Many species have...
The Amazon forest is one of the world's most complex, unknown and threatened ecosystems that holds a considerable part of biodiverse species in different groups. This ecosystem needs greater scientific attention so that we can better understand the features of the fauna, flora and microbiota to conserve species before they disappear. Thus, this boo...
The Amazon floodplain has a complex seasonal flood regime. About 20 species of the genus Pomacea live in this flood regime, among them Pomacea amazonica (Reeve, 1856) and Pomacea bridgesii (Reeve, 1856). This study evaluated the desiccation tolerance of P. amazonica and P. bridgesii, with the hypothesis that these gastropods can survive the long dr...
Many species of prawns and shrimp are widely consumed by humans around the world. Information about the ecology, behavior and culture can influence meat quality and it is important to improve the use of this fish resource. The aim of this study is to determine the yield and nutritive output of meat from the Macrobrachium amazonicum freshwater prawn...
Gastropods of the genus Pomacea are ecologically important and are used as a source of protein in human food and in the pet market. The use of members of this genus as pets and for aquaculture around the world has enabled these snails to become pests, invading biomes in countries where they do not occur naturally and causing ecological problems. Th...
For many species the population structure varies along latitudinal gradients, especially at the extremes of their distributions. This may apply to invasive species, whose ability to grow, reproduce, feed and compete is hypothesized to be lower at higher latitudes. A population of Charybdis hellerii was investigated on a rocky shore at Armação do It...
A marine biological invasion is a natural process accelerated by human activities, and the crab Charybdis hellerii is an example of a globally widespread invasive species. This study evaluated color variation in C. hellerii and its relationship to the sex, size and sexual maturity of these crabs, and compared the efficiency of a freeware digital im...
This study investigated the effect of culture density on the juvenile development of the freshwater crab Dilocarcinus pagei, analyzing the mortality, size increment and mutilation. Juvenile crabs were cultured for 90 days in three treatments with three replicates: T1 - 2 animals L-1; T2 - 3 animals L-1; and T3 - 4 animals L-1. Mortality was high an...
The Amazon floodplain has a complex seasonal flood regime. About 20 species of the genus Pomacea live in this flood regime, among them Pomacea amazonica (Reeve, 1856) and Pomacea bridgesii (Reeve, 1856). This study evaluated the desiccation tolerance of P. amazonica and P. bridgesii, with the hypothesis that these gastropods can survive the long dr...
The mangrove crab Ucides cordatus is one of the most exploited crustaceans in Brazil. The present study investigated the breeding season of this species and the period of the "andada" phenomenon, when the crabs are active outside their burrows and perform agonistic behaviors. Furthermore related them to environmental factors, in a mangrove on the c...
Trawl fisheries are associated with catches of swimming crabs, which are an important economic resource for commercial as well for small-scale fisheries. This study evaluated the population biology and distribution of the swimming crab Callinectes ornatus (Ordway, 1863) in the Estuary-Bay of Sao Vicente, state of Sao Paulo, Brazil. Crabs were colle...
Dilocarcinus pagei is a medium-sized species of freshwater crab that lives associated with macrophytes. Little is known of its ecology, including aspects such as activity periods and substrate selection. This study describes the behavior and activity periods for both sexes, of crabs obtained from a population in the Amazon basin. Thirty specimens o...
Butyltin (BT) contamination was evaluated in hermit crabs from 25 estuaries and in sediments from 13 of these estuaries along about 2,000 km of the Brazilian coast. BT contamination in hermit crabs ranged from 2.22 to 1,746 ng Sn g-1 of DBT and 1.32 to 318 ng Sn g-1 of TBT. In sediment samples, the concentration also varied widely, from 25 to 1,304...
The species of the genus Pennella are highly modified copepods that have been found parasitizing several species of fishes in Atlantic waters. Although these parasites have been recorded several times in the Atlantic Ocean, little is known about them in South Atlantic waters, except for one report published 20 years ago. The present contribution re...
Parental care is a common strategy in many animal groups, to increase survival of the off- spring. Here, we report parental care in the freshwater crab Sylviocarcinus pictus. A female caught in the Amazon River, Brazil, bore juvenile crabs rather than eggs on her abdomen. Kept in the laboratory, the female retained the juveniles on the abdomen for...
Invasive species are potential threats to biodiversity, especially if they become established and outnumber native species. In this study, a population of the non-indigenous crab Charybdis hellerii was analyzed in an estuary-bay complex on the southeastern Brazilian coast, with respect to its abundance relative to sympatric native brachyuran specie...
The effect of crab behaviour on shell-use dynamics was analysed, comparing both interference and exploitation behaviours between the hermit crabs Pagurus criniticornis and Pagurus brevidactylus. Although these species exhibited microhabitat separation, with P. criniticornis dominating (100%) in sandy substrates and P. brevidactylus (80%) on rocky s...
Portunid crabs are an important resource in estuaries, and require appropriate management to guarantee their long-term availability.We investigated the population dynamics and reproduction of Callinectes danae in the Estuarine�Bay Complex of Sa˜o Vicente, Sa˜o Paulo, Brazil, to provide basic biological information for public policies for the manage...
Biological invasions are a present and growing environmental problem because non-indigenous organisms may affect the structure and functioning of native communities. In the marine environment there are records of invasive species in almost all phyla, including crustaceans, and the portunid crabs of the genus Charybdis are among the most widespread...
Tributyltin (TBT) contamination affects the reproductive system of many species of invertebrates worldwide. The present study was designed to evaluate the effects of exposure to TBT pollution on the reproduction of the hermit crab Clibanarius vittatus. An orthogonal experiment was designed with two treatments: contamination (with or without TBT in...
Evaluation of the assimilation pathway and depuration time of a given pollutant by aquatic species is
important to understand the dynamics of this substance in the biota, and to search for potential ecological
indicators. In the present study, the uptake pathway and depuration time and rate of the pollutant
tributyltin (TBT) were investigated in th...
The hermit crab Clibanarius vittatus is a typical organism from intertidal regions being
considered as a good bioindicator of tributyltin presence at these environments. Thus this study
presents the analytical performance and validation method for TBT quantification in tissues of
C. vittatus by gas chromatography with pulsed flame photometric detec...
Organotin compounds have been extensively discussed worldwide. In Brazil, since 2001 several studies have evaluated organotins in abiotic and biotic matrices, and the results indicate that there is still cause for concern. Because of their hydrophobic behavior, sediments are the main focus of organotin pollution monitoring in risk areas in marine e...
Intersexuality in hermit crabs was investigated
using anatomical, histological and electronmicroscopy
techniques, with Clibanarius vittatus as a
model. The specimens were collected in the intertidal
zone of Pescadores Beach, state of São Paulo, Brazil,
and dissected to describe the anatomy of the reproductive
organs. Different portions of the repro...
Contamination by butyltin compounds (BTs) has been reported in estuarine environments worldwide, with serious impacts on the biota of these areas. Considering that BTs can be degraded by varying environmental conditions such as incident light and salinity, the short-term variations in such factors may lead to inaccurate estimates of BTs concentrati...
Experimental analyses of hermit crabs and their preferences for shells are essential to understand the
intrinsic relationship of the crabs' dependence on shells, and may be useful to explain their shell use pattern in nature. The aim of this study was to evaluate the effect of crab species and site on the pattern of shell use, selection, and prefer...
The population dynamics and reproduction of the hermit crab Clibanarius vittatus were evaluated on Pescadores Beach, located on the estuarine channel of Sa˜o Vicente (Sa˜o Paulo), Brazil. The hermit crabs were captured by hand during low tide, from May 2001 to April 2003. A total of 2554 hermit crabs were captured, of which 701 were males, 1741 non...
The present study analyzed the growth of males and females of the hermit crab Clibanarius vittatus (Bosc, 1802), at São Vicente, São Paulo, Brazil. Monthly collections were made from May/2001 through April/2003, at the Pescadores Beach in São Vicente. The 2,501 crabs caught were identified and sexed and the carapace shield length (CSL) was measured...
The crustaceans activity of move about could alter in function of the environmental conditions. In the present study, this activity of the hermit crab Clibanarius vittatus was studied in dry and submerged areas of the intertidal region of Pescadores Beach in São Vicente (SP), Brazil. In both areas 110 animals (86 of dry and 24 of submerged area) we...
The objective of the present study was to characterize the spatial distribution and shell utilization of three hermit crab species in the estuarine-bay complex of São Vicente, São Paulo State, Brazil. Monthly samples were done throughout two years, in the non-consolidated sub-littoral at the estuarine-bay complex. The environmental factors, such as...
The objective of the present study was to analyze the meat yield for both sexes of the crab Callinectes bocourti in the region of Iguape, Brazil. The carapace width for males was 78.1-114.0 mm (96.7 ± 9.5 mm) and for females 76.0-106.3 mm (93.0 ± 7.8 mm). In males, the total wet weight ranged from 65.53 to 24.36 g (134.04 ± 40.77 g) and for females...
The objective of the present study was to analyze the meat yield for both sexes of the crab Callinectes bocourti in the region of Iguape, Brazil. The carapace width for males was 78.1-114.0 mm (96.7 ± 9.5 mm) and for females 76.0-106.3 mm (93.0 ± 7.8 mm). In males, the total wet weight ranged from 65.53 to 224.36 g (134.04 ± 40.77 g) and for female...
Despite the economic importance of thecarcinofauna which inhabits the estuarine regionsof São Vicente, state of São Paulo, Brazil, thereare few studies of the biology, distribution andbiodiversity of crustaceans. The aim of this workwas to list the species of macrocrustaceans thatinhabit the non-consolidated substrates ofEstuarine Bay Complex in Sã...
We evaluated the gastropod shell utilization pattern of the hermit crab Clibanarius vittatus (Bosc, 1802) at Pescadores
Beach in São Vicente, State of São Paulo, Brazil. Specimens were collected monthly from May 2001 through April 2003, in the
intertidal zone at low tide. The crabs were weighed and their carapace shield length measured. All gastrop...
The objective of the present study was to characterize the spatial distribution and shell utilization of three hermit crab species in the estuarine-bay complex of São Vicente, São Paulo State, Brazil. Monthly samples were done throughout two years, in the non-consolidated sub-littoral at the estuarine-bay complex. The environmental factors, such as...
Hermit crabs depend on mollusc shells for housing. In this study, an unusual resource is reported for a
hermit crab that usually inhabits marine gastropod shells. During a field study conducted from May 2001 to April 2003
in an estuarine area in São Vicente, state of São Paulo, Brazil, 21 individuals of Clibanarius vittatus (Bosc, 1802) were
found...
Hermit crabs depend on mollusc shells for housing. In this study, an unusual resource is reported for a hermit crab that usually inhabits marine gastropod shells. During a field study conducted from May 2001 to April 2003 in an estuarine area in São Vicente, state of São Paulo, Brazil, 21 individuals of Clibanarius vittatus (Bosc, 1802) were found...
A prevalência de infestação de simbiontes nas
conchas de Clibanarius vittatus foi avaliada. Os animais foram
amostrados manualmente durante a maré baixa, na Praia dos
Pescadores, São Vicente, SP, com coletas mensais de maio/2002
a abril/2003. Todos os animais amostrados foram sexados,
mensurados, identificada a espécie de concha e registrado a
pres...
The objective of this study was to analyze the distribution of Arenaeus cribrarius (Lamarck, 1818), in
the Complex Bay-Estuary of São Vicente, SP, Brazil. Sampling was done monthly from September/
2000 to August/2002 over four radials distributed along the complex. The sampled crabs were
screened in a boat equipped with an “otter trawl”. Every mont...
Questions
Questions (2)
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Has anything similar ever happened to you?
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