Yvonnick Le Pendu

• PhD
• Professor (Full) at State University of Santa Cruz

Brazil is one of the largest consumers of herbicides in the world, and glyphosate-based herbicides (e.g., Roundup®) are commonly applied in cropland. Among vertebrates, amphibians are especially susceptible to contamination due to their strong association with freshwater environments. However, our knowledge of how these herbicides affect amphibians...

This study aimed to investigate whether the use of space and movements of Guiana dolphins were altered during the construction of a cable-stayed bridge at the mouth of the Cachoeira River estuary in Ilhéus, Brazil. We described and compared the visitation rate, use of space, and movements of the Guiana dolphins across two periods: before the constr...

Ocean warming, acidification, and deoxygenation are expected to intensify without significant climate mitigation. In tropical regions, rising ocean temperatures may push marine species to their thermal limits, leading to redistributions and cascading effects on communities and ecosystems. We evaluate how the future climate change scenarios could im...

Tadpole diet studies based in gut content analysis provide information on the diversity of prey consumed, foraging behavior and ecological function of tadpoles. Although trophic ecology studies have increased, tadpole diet is still understudied compared to the high diversity of anurans species, especially in some families such as Microhylidae, whic...

Dendropsophus nekronastes is a poorly known species of the D. leucophyllatus group endemic to the Atlantic Forest of southern Bahia, Brazil. We describe the external morphology of the tadpole of D. nekronastes and compare it with other known tadpoles of the D. leucophyllatus group. The tadpole of D. nekronastes generally resembles most species of t...

Much data is still lacking to conduct a rigorous assessment of the status of the Guiana dolphin, Sotalia guianensis, a coastal-estuarine dolphin of eastern Central America and northeastern South America, considered vulnerable to extinction in Brazil, relevant information is still lacking to evaluate its global population trends. This article presen...

Ecological niche models (ENMs) predict where species can occur in accordance with environmental factors. Suitability maps are generated through models to identify habitats more or less adapted to the species. Published works on the distribution and habitat use of Guiana dolphin, Sotalia guianensis, are limited to fine spatial scales. Here, we aimed...

Understanding the diet of tadpoles is fundamental to explain their ecological roles in aquatic food webs, as well as to allow more effective amphibian conservation and management programs. Studies on trophic ecology of tadpoles are scarce compared to other vertebrate groups, a gap that is even more accentuated in the Neotropical region, which harbo...

Found in the main rivers of the Amazon Basin, the Amazonian manatee (Trichechus inunguis) is the largest aquatic freshwater mammal in South America. The objective of this study was to describe the ecological knowledge and uses of the Amazonian manatee in the Extractive Reserve Verde para Sempre, Porto de Moz, Brazilian Amazon. This study was conduc...

The advertisement call of Macrogenioglottus alipioi was firstly described 40 years ago from Santa Teresa municipality, Espírito Santo state, Brazil. With the advancement of digital recording and call analysis in bioacoustics, we redescribe the advertisement call of M. alipioi from a population close to its type locality, municipality of Uruçuca, Ba...

Frogs of the subfamily Leptodactylinae Werner can be found from southern Texas (USA) to southern Brazil, including the northern Antilles (Frost 2019). This subfamily is composed of 98 recognized species and the genus Leptodactylus Fitzinger contains the largest number of species (74 sp.) (Frost 2019). A study conducted by de Sá et al. (2014) provid...

To better understand the threats posed by human activities on cetaceans, we compiled published studies and determined where, how, and by whom the research on this subject has been conducted in Brazil. We also determined which cetacean species were mostly investigated in these studies. We gathered the available scientific literature published from 1...

In the present study we used larval amphibians (Rhinella jimi) as prey, and beetle larvae (Hydrophilus sp.) as predator to assess if increased water temperature influences predator-prey dynamics. The experiment was carried out in replicated aquatic microcosms with two different water temperatures (control and a ‘warming water’ scenario). Survival o...

- There is little Brazilian literature on threats to cetacean; - Almost half of the publications have some international collaboration; - Half of the study areas are concentrated in only three of the 16 Brazilian states; - Depletion of fish stock, noise pollution and rubbish ingestion are themes that require further studies; - Threats to 20 spe...

Ethnobiological studies are necessary to understand the relationships between fishers and cetaceans. The aim of this study was to describe the interactions between cetaceans and artisanal fishers and the possible conflicts that can arise as a result. Semi-structured interviews were conducted from February to September 2017 with 35 fishermen from th...

Dogs (Canis familiaris) are among the most abundant and widely distributed carnivores worldwide, and their presence can have negative impacts on native fauna. This study investigated the invasion of cacao agroforests by free-ranging dogs in Brazil. By monitoring the behavior of dogs using direct observations, we assessed whether direct (chasing and...

Boat engines increase the noise levels of the oceans, alter the acoustic environment of cetaceans and diminish their efficiency to echolocate. This study aims to determine if Guiana dolphins (Sotalia guianensis) are influenced by boat approaches. A land-based survey was conducted to record behavioral responses and count surfacing events of Guiana d...

With the loss and fragmentation of tropical forests, the survival of primates depends on their ability to adapt to human-introduced modifications in their habitat. Marmosets are known for their ecological and behavioral plasticity and have been registered in various agricultural landscapes. Our goal was to describe the ecology of tufted-ear marmose...

Listas de espécies ameaçadas identificam taxa com real ou potencial risco de extinção em uma escala regional e global, embasando a tomada de decisões e a formulação de políticas públicas. A construção da primeira lista estadual de espécies ameaçadas de extinção na Bahia teve início em 2013. Este artigo descreve a avaliação do status de conservação...

A presente publicação objetiva disponibilizar a produtores rurais, estudantes e técnicos orientações a respeito de métodos apropriados de produção de caititus em cativeiro, a fim de oferecer uma fonte de proteína e/ou de renda opcional para os produtores rurais e uma alternativa à caça, que junto com o desmatamento pode levar à diminuição da abundâ...

The collared peccary (Pecari tajacu) is a species with great potential for breeding in captivity since it adapts well to a variety of foods, has a high breeding capacity and there is an existing market for its meat and leather, which is of excellent quality. However, it is necessary to understand its social structure, when maintained in intensive b...

Sotalia guianensis is listed as Data deficient by IUCN due to the lack of information on population parameters. The species is considered vulnerable in Brazil since 2014. Here we analyze the abundance and describe the parameters of the population of Guiana dolphins of Ilhéus. A total of 139 individuals were identified from 2007 to 2014 based on a d...

Signature whistles have been widely studied in bottlenose dolphins (Tursiops truncatus). A recent study suggested the occurrence of signature whistles in Guiana dolphins (Sotalia guianensis) but could not identify the whistlers. The objective of this study is to describe the whistle characteristics in the population of S. guianensis from Ilhéus and...

This study pretends to determine baseline data on the health and mortality of a colony of captive collared peccaries in the Eastern Amazon (Belém, State of Pará, Brazil) during a 65-months survey. Thirty-nine out of 166 animals (23.5%) died and were examined post-mortem. Monthly mortality averaged 1.2%. The highest mortality rate was observed in ne...

This work aims to determine the most suitable nonlinear model to describe the growth of female collared peccaries (Pecari tajacu). The monthly records of the weight of 10 captive female collared peccaries over a period of two years in the Brazilian Amazon Region were used. The growth models used were the Von Bertalanffy, Brody, Gompertz and Logisti...

Artisanal fishermen, because of their direct and frequent contact with the aquatic environment, possess a wealth of knowledge about the natural history of the fauna of the region in which they live. This knowledge, both practical and theoretical, has been frequently utilized and integrated into academic research. Taking this into consideration, thi...

The sustainability and production of collared peccary (Pecari tajacu) has been studied in the last few years; however, further information on its reproduction is necessary for breeding systems success. Understanding folliculogenesis aspects will contribute to effective reproductive biotechniques, which are useful in the preservation and production...

The play consists, apparently, of actions performed for no other purpose than amusement of the animal. This study aimed to describe the play performed by estuarine dolphins (Sotalia guianensis) at Porto de Ilhéus. A total of 548.3 hours of direct observation were carried out from September 2007 through August 2008, by means of incident sampling met...

This study identified fruit species eaten by Leontopithecus chrysomelas (golden-headed lion tamarins; GHLTs) and related their consumption to seed dispersal. Two GHLT groups were monitored from September 2006 through August 2007 in Una Biological Reserve, Bahia, Brazil. GHLTs consumed fruit from 71 species, preferred mature fruit and swallowed the...

Living in group provides protection to small cetaceans and enhance prey capture. Boat traffic can impact group formation and activities of coastal dolphins. This study aims to characterise the occurrence, group characteristics and activity of estuarine dolphins (Sotalia guianensis) and their response to boat traffic in Porto de Ilhéus (BA), Brazil....

Apresentamos uma análise quantitativa dos criadouros comerciais de animais silvestres no Brasil e discutimos as pesquisas científicas recentes sobre as espécies de vertebrados de interesse econômico com maior número de estabelecimentos autorizados. A análise está baseada em duas listas disponibilizadas pelo Instituto Brasileiro do Meio Ambiente e d...

Este trabalho teve por objetivo estudar o ciclo estral do cateto, aplicando a colpocitologia como método diagnóstico. As amostras da citologia vaginal foram coletadas em dez fêmeas adultas, durante três vezes na semana, por seis meses. Verificou-se que a duração média do ciclo estral para esta espécie foi de 28,45 ± 5,45 dias. Observou-se diferença...

The main objective of this work was to study the estrous cycle of collared peccary by vaginal cytology. Samples were collected in 10 adult females, three times a week, for six months. The estrous cycle period for this specie was 28.45 ± 5.45 days. We observed a significant difference (p<0.01) between the cell types in the same phase of the oestrous...

Intensive production system of collared peccary (Pecari tajacu) in Brazilian Amazon - Volume 1 Issue 2 - Natália Inagaki de Albuquerque, Diva Anélie Guimarães, Hilma Lúcia Tavares Dias, Yvonnick Le Pendu, Priscila Reis Kahwage, Alexandre Rossetto Garcia

In tropical forests, wild game meat represents an option or the only protein source for some human populations. This study analyzed the wildlife meat trade destined to human consumption in an open market of the Amazon rainforest, Brazil. Wildlife meat trade was monitored during 2005 through interviews to vendors and consumers in order to evaluate t...

We analyzed the influence of time, tide and water depth on the activity and spatial distribution of estuarine dolphins Sotalia guianensis in Pontal Bay, Ilhéus, Brazil. Direct observations were carried out at four fixed points from January to December of 2006. Estuarine dolphins were sighted in 11 out of 12 months and in 30% of 181 sampling periods...

— The last West African giraffes : insured survival or threatened future ? — The present paper describes the current situation of the giraffes of Niger. While the giraffe population there has increased from an estimated 49 in 1996 to more than 200 today, they remain extremely vulnerable. As a matter of fact, the abandonment of the local development...

The present paper describes the current situation of the giraffes of Niger. While the giraffe population there has increased from an estimated 49 in 1996 to more than 200 today, they remain extremely vulnerable. As a matter of fact, the abandonment of the local development initiative, begun in 1996, had adversely affected the area inhabited by gira...

This study analyses reproductive parameters resulting from 74 parturitions in a population of captive collared peccaries in the eastern Amazon (Belém, State of Pará, Brazil) during a 65-month survey. Parturitions were homogeneously distributed throughout the year. The average litter size was 1.85 newborns per parturition. Collared peccary females h...

This study pretends to determine baseline data on the health and mortality of a colony of captive collared peccaries in the Eastern Amazon (Belém, State of Pará, Brazil) during a 65-months survey. Thirty-nine out of 166 animals (23.5%) died and were examined post-mortem. Monthly mortality averaged 1.2%. The highest mortality rate was observed in ne...

Activity patterns in captive collared peccaries (Tayassu tajacu). Wild populations of collared peccaries (Tayassu tajacu) present a predominantly diurnal activity pattern in the tropics. In captivity, this pattern may be modified, mainly because of handling conditions. Captive animals generally adapt their behavior to factors such as schedule of fo...

Hunting, although prohibited, is widely practiced by the rural inhabitants settled along the Transamazon highway. In 1997 and 2000, we investigated subsistence hunting in Uruar, a township located on an Amazonian pioneer front (Brazil). We analyze hunting practices, game yield, hunting efficiency and their relation to forest coverage rate. The hunt...

A teoria do apego tem considerado a relação mãe-criança como um determinante do desenvolvimento, sendo que sua qualidade tem sido relacionada com a sensibilidade do cuidador, e conseqüentemente com a qualidade das relações com seus próprios cuidadores. Recentemente, tem se relacionado a sensibilidade materna com vários fatores, incluindo classe soc...

The remaining West African giraffes (Giraffa camelopardalis) are found in Niger (62 individuals in January 1998). Their feeding behaviour was studied by direct observation during two periods of 6 and 12 mo. The giraffe's diet is diverse : at least 45 plant species were eaten, depending on spatial arrangement and a given plant's stage of growth. Tim...

Este trabalho teve por objetivo obter dados sobre a biologia reprodutiva da fêmea de caititu criada em cativeiro. Pelos resultados analisados, observou-se que os nascimentos ocorreram durante todos os meses do ano, mostrando que esta espécie não apresenta sazonalidade reprodutiva. A maioria dos partos foram gemelares, porém houve registro de nascim...

The social organization of the last population of giraffes (Giraffa camelopardalis) in West Africa was studied between October 1996 and December 1997. Population size increased from 51 to 63 individuals during the study period. Groups were larger during the rainy season (mean group size 9.4) than during the dry season (mean group size 6; U = 4131;...

La chasse, bien qu’interdite, est largement pratiquée par les populations rurales installées le long de la route transamazonienne. En 1997, un diagnostic de cette chasse de subsistance a été réalisé dans la commune d’Uruará au Brésil. Les trois techniques de chasse couramment utilisées ont été la battue, l’affût et le piège. Chacune a permis d’expl...

Discutimos as implicações da noção de adaptação que é uma noção chave para a teoria da evolução clássica. Em lugar de obstinar-se em considerar os organismos como coleção de traços adaptados, propomos buscar estudar a evolução por meio de um quadro teórico onde prevalece uma outra ontologia que destaca o fato de que os organismos e as circunstância...

The fact that sexual segregation can occur in wild ruminants independently of sex-related differences in habitat use suggests that it results at least partly from social mechanisms. One of the simplest mechanisms which can be hypothesised is that individuals avoid the congener classes which frequently try to interact with them (be these interaction...

The giraffes of Niger are the last West African giraffes. This last remaining population, reduced to less than 100 individuals, is found in the Koure area and the northern part of the Dallol Bosso, one hundred kilometres East of Niamey. These giraffes live peacefully with humans and cattle, in a non-protected area, without predators. They are threa...

The giraffes of Niger are the last West African giraffes. This last remaining population, reduced to Jess than 1 00 in di viduals, is found in the Kou re area and the northern part of the Dallol B osso, one hundred kilometres East of Niamey. These giraffes live peacefully with humans and cattle, in a non-protectcd area, without predators. They arc...

The last population of giraffes in west Africa lives in Niger in an unprotected Sahelian region inhabited by farmers and herders. The spatial behaviour of each individual of the population (n = 63) was studied by direct observation during 15 mo. Two-thirds of the population were resident in the tiger bush in the rainy season and in the nearby area...

The spatial structure of groups of Mediterranean mouflon was compared during spring/summer in a small population living on a sandy terrace in eastern Germany and within part of a large population inhabiting a low mountain in southern France. A similar comparison was also conducted throughout the year in the French population. The aim of the study w...

Our study of mouflon (Ovis musimon) rams in the Caroux-Espinouse massif (southern France) shows that several forms of philopatry occur. Some of the rams were sedentary, as were the ewes, up to the age of four years. Most of the rams, however, started to enlarge their home range from the age of two years. Rams of intermediate age visited their birth...

We analysed individual associations between mouflon (Ovis orientalis musimon) observed during one year in order to find ontogenetic patterns underlying the social structure of the population. A correspondence factorial analysis was performed on Simpson's coefficients to compare association profiles. No strong association was found between adults bu...

The European roe deer (Capreolus capreolus) has locally colonized open agricultural lands for some decades. In the present paper, size of winter groups of this species is compared at six sites of various openness, as well as in two of the sites for different population densities. Mean group size, reaching eight deer in the most open cultivated area...

Sotalia guianensis inhabits the coast of Ilhéus, southern Bahia, Brazil. This species present an extent distribution along the Central and South America, including many estuarine areas along the Brazilian coast. Despite an increasing number of studies on the biology of the species, little is known about its ecology in the northeastern coast of Braz...

Introdução Segundo a maioria dos especialistas, o ouriço-preto (Chaetomys subspinosus) e o ouriço-amarelo (Sphiggurus insidiosus) pertencem a mesma família: Erethizontidae. Os hábitos solitários, noturnos e arborícolas dos membros dessa família os tornam difíceis de se observar, e explica o pouco conhecimento biológico destes (Alberico et.al, 1999)...