Don’t let me down: West Indian manatee, Trichechus manatus, is still critically endangered in Brazil

Meirelles, Ana Carolina Oliveira de; Lima, Danielle; Alves, Maria Danise de Oliveira; Borges, João Carlos Gomes; Marmontel, Míriam; Carvalho, Vítor Luz; Santos, Fabrício R.

doi:10.1016/j.jnc.2022.126169

Cited by 10 publications

(11 citation statements)

References 108 publications

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“…The literature describes some examples and situations of ecosystem services associated with manatees, including the following: Supporting -Manatees are herbivores considered nutrient recyclers (Castelblanco-Martínez et al 2012;Reynolds et al 2008;Meirelles et al 2022). As such, they consume aquatic plants and supply nutrients through their feces and urine to aquatic grass banks (Wirsing et al 2022), thus promoting growth and recovery after herbivory (Heinsohn et al 1977).…”

Section: Discussionmentioning

confidence: 99%

“…Among the sirenians, the West Indian manatee (Trichechus manatus) is classified as vulnerable, according to the International Union for the Conservation of Nature and Natural Resources (Deutsch et al 2008). However, Meirelles et al (2022) detected a still drastic reduction in the current population size, with expectations of a decrease in the future. For this reason, its reclassification as "critically endangered" is recommended.…”

Section: Introductionmentioning

confidence: 99%

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Knowledge of marine mammal professionals on ecosystem services associated with the marine manatee (Trichechus manatus) in Brazil

Izidoro¹,

Romero²,

Schiavetti³

2022

Ethnobio Conserv

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Ecosystem services are the benefits derived from the ecosystems we occupy. These services are related to biodiversity and this interaction ensures the functioning of the processes necessary for their own maintenance. This study aimed to describe and analyze social and professional variables and identify the knowledge of ecological and ecosystem services of professionals who work with the marine manatee in Brazil. National legislation lacks data about ecosystem services associated with manatees, so the familiarity of professionals with the subject becomes essential for their identification. Data were collected using forms completed autonomously by professionals who participated in the elaboration of the National Action Plan for the Conservation of Sirenia. The questionnaires were sent by email to 21 professionals from April to October 2020. Among these professionals, 15 completed and returned the form. Most respondents work at private institutions and have more than ten years' experience. No differences were observed regarding the presence of ecosystem services, that is, the respondents believe that all categories were relevant in their geographic area. We found a positive and significant correlation between pressures and threats in manatees, demonstrating that the current impacts affecting the species and its ecosystem services will remain in the future. Most respondents stated that there is a relationship between the culture of the community and the manatee. The cultural manifestations associated with the animal proved to be exclusive to some areas of occurrence, thus providing an identity for these regions. This attraction can generate income for local communities and reduce threats to the animal. Recognizing ecosystem services can help in the management of protected areas and in conducting priority actions for the conservation of the manatee.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Knowledge of marine mammal professionals on ecosystem services associated with the marine manatee (Trichechus manatus) in Brazil

Izidoro¹,

Romero²,

Schiavetti³

2022

Ethnobio Conserv

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“…Given the considerable pressures on the surviving wild populations, this species is one of the most endangered marine mammals, categorized as 'Endangered' in the country since 2014 (MMA, 2022). However, a recent study indicated a projected reduction of greater than 80% from 2014 to 2083, classifying it as 'Critically Endangered' (Meirelles et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Given the considerable pressures on the surviving wild populations, this species is one of the most endangered marine mammals, categorized as ‘Endangered’ in the country since 2014 (MMA, 2022). However, a recent study indicated a projected reduction of greater than 80% from 2014 to 2083, classifying it as ‘Critically Endangered’ (Meirelles et al, 2022). The distribution of the Antillean manatee within a given area is primarily influenced by the presence of aquatic vegetation (Lefebvre et al, 2001; Deutsch et al, 2003; Reich & Worthy, 2006; Marsh et al, 2012), sources of freshwater (Castelblanco‐Martínez et al, 2013; Landero et al, 2014; Alvarez‐Alemán et al, 2017; Favero et al, 2020), warm water (Deutsch et al, 2003; Jiménez, 2005), tides (Paludo & Langguth, 2002; Silva et al, 2011), water depth (Olivera‐Gómez & Mellink, 2005; Alves et al, 2013) and salinity (Olivera‐Gómez & Mellink, 2005; Landero et al, 2014; Alvarez‐Alemán et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Behaviour and occurrence of the Antillean manatee (Trichechus manatus manatus) in relation to habitat characteristics and the influence of human activities in a protected area in north‐eastern Brazil

Campos

Souto

Júnior

et al. 2023

Aquatic Conservation

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While all sirenian species are considered sentinel animals for the ecological health of their habitat, they are currently facing extinction risk. The Antillean manatee (Trichechus manatus manatus) is classified as an endangered species in Brazil. Its distribution and behaviour are mainly influenced by the presence of aquatic vegetation, freshwater and anthropogenic activities, as well as by variations in tides, temperature and salinity. The study investigated the behaviour of manatees in the Barra do Rio Mamanguape Environmental Protection Area in north‐eastern Brazil, and the relationship between these behaviours and the biotic and abiotic characteristics of this estuarine environment. The behavioural data were collected between November 2016 and May 2017, during 35 days of monitoring. The records of surface behaviour were obtained using animal focal sampling. Anthropogenic activities were recorded qualitatively and quantitatively during the surveys. Warmer water (30–31°C), reduced turbidity (1–2 m) and sandy sediments had a significant influence on the behaviour of the manatees. The manatees presented neutral behaviour more often than expected in response to anthropogenic activities, which indicates that the animals were undisturbed by these activities. This is the first systematic study of the influence of biotic and abiotic factors on the behaviour and ecology of Antillean manatees in a protected area of a tropical region, providing important new insights into the behavioural ecology of an endangered species. The Barra do Rio Mamanguape Environmental Protection Area seems to fulfil the goal of adequate management and conservation of manatees in a tropical region. Specifically, it shows that appropriate management, law enforcement and inspection measures are essential for maintaining endangered populations.

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“…Todas as espécies da ordem Sirenia são consideradas vulneráveis de acordo com seu status de conservação Meirelles et al 2022). Durante muitos anos a caça de peixes-boi foi amplamente explorada para consumo de carne, fabricação de óleos com sua gordura, utilização de ossos para confecção de pentes, broches, e a utilização de sua pele (Robards & Reeves 2011;Figura 6).…”

Section: Status De Conservação Do Peixe-boiunclassified

A história evolutiva de peixes-boi contada através do genoma

Martinha Silva de Souza

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AGRADECIMENTOSÀ minha orientadora, Profa. Dra. Mariana Freitas Nery, por ter me acolhido em seu laboratório e nunca ter desistido de mim. Por dar chance à uma pessoa vinda de fora da UNICAMP, e de fora do eixo sul e sudeste. Para mim foi com grande felicidade e empolgação que embarquei para o outro lado do país em rumo a essa jornada nem sempre fácil que é a pós-graduação. Obrigada pela paciência, pelas oportunidades, pelo carinho e compreensão nessa montanha-russa da vida.Aos meus amigos de laboratório que me proporcionaram momentos incríveis, Flávia Akemi, Lucas Canesin e Bruna Dias, vocês de longe foram os melhores de Campinas. A Elisa Ramos e Agnello Picorelli pelo apoio na reta final com seus comentários, ensinamentos e entusiasmo. A Lucas Freitas, por quem tenho profunda admiração pela humildade, sabedoria e simplicidade, você é um exemplo para muitos.Aos meus amigos de Manaus que desde minha partida me deram força, apoio, carinho e compreensão:

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Don’t let me down: West Indian manatee, Trichechus manatus, is still critically endangered in Brazil

Cited by 10 publications

References 108 publications

Knowledge of marine mammal professionals on ecosystem services associated with the marine manatee (Trichechus manatus) in Brazil

Knowledge of marine mammal professionals on ecosystem services associated with the marine manatee (Trichechus manatus) in Brazil

Behaviour and occurrence of the Antillean manatee (Trichechus manatus manatus) in relation to habitat characteristics and the influence of human activities in a protected area in north‐eastern Brazil

A história evolutiva de peixes-boi contada através do genoma

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