Coastal development and habitat loss: understanding and resolving associated threats to the franciscana, Pontoporia blainvillei

Domit, Camila; Trevizani, Tailise Hoppe; Farro, Ana Paula Cazerta; Silva, Angela Zaccaron; Belleghem, Tara Van; Herbst, Danniele Firme; Tardin, Rodrigo H.; Bisi, Tatiana L.; Laporta, Paula; Vidal, Lara G.; Chupil, Henrique; Marcondes, Daiane Santana; Fonseca, Gabriel Fraga da; Valle, Rodrigo del Rio do; Berninsone, Leonardo G.; Barbosa, Carla Beatriz; Cremer, Marta Jussara; Broadhurst, Matt K.

doi:10.1016/b978-0-323-90974-7.00010-0

Cited by 4 publications

(4 citation statements)

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“…However, we were not able to observe statistically significant differences regarding the prevalence of viral agents (in this case herpesvirus, the only one detected in the study) according to the type of habitat (coastal, mixed or pelagic). The most numerous coastal species analyzed were Guiana dolphins (n = 59) and franciscanas (n = 52), considered vulnerable to various impacts resulting from human activities 53,54 . Interestingly, the family Pontoporiidae (which comprises only one species, the franciscana) presented a significantly higher number of herpesvirus-positive individuals (p = 0.02) and of herpesvirus-positive liver samples when compared to Delphinidae included in the study.…”

Section: Discussionmentioning

confidence: 99%

Survey of selected viral agents (herpesvirus, adenovirus and hepatitis E virus) in liver and lung samples of cetaceans, Brazil

Sacristán,

Ewbank,

Duarte-Benvenuto

et al. 2024

Sci Rep

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Hepatic and pulmonary lesions are common in cetaceans, despite their poorly understood viral etiology. Herpesviruses (HV), adenoviruses (AdV) and hepatitis E virus (HEV) are emerging agents in cetaceans, associated with liver and/or pulmonary damage in mammals. We isolated and molecularly tested DNA for HV and AdV (n = 218 individuals; 187 liver and 108 lung samples) and RNA for HEV (n = 147 animals; 147 liver samples) from six cetacean families. All animals stranded or were bycaught in Brazil between 2001 and 2021. Positive-animals were analyzed by histopathology. Statistical analyses assessed if the prevalence of viral infection could be associated with the variables: species, family, habitat, region, sex, and age group. All samples were negative for AdV and HEV. Overall, 8.7% (19/218) of the cetaceans were HV-positive (4.8% [9/187] liver and 11.1% [12/108] lung), without HV-associated lesions. HV-prevalence was statistically significant higher in Pontoporiidae (19.2%, 10/52) when compared to Delphinidae (4.1%, 5/121), and in southeastern (17.1%, 13/76)—the most industrialized Brazilian region—when compared to the northeastern region (2.4%, 3/126). This study broadens the herpesvirus host range in cetaceans, including its description in pygmy sperm whales (Kogia breviceps) and humpback whales (Megaptera novaeangliae). Further studies must elucidate herpesvirus drivers in cetaceans.

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Section: Discussionmentioning

confidence: 99%

Survey of selected viral agents (herpesvirus, adenovirus and hepatitis E virus) in liver and lung samples of cetaceans, Brazil

Sacristán,

Ewbank,

Duarte-Benvenuto

et al. 2024

Sci Rep

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“…For instance, vast regions of the northern Brazilian coast remain unmonitored for stranded marine mammals. Taking this into account, any reported events involving Bryde's whales and vessel collisions are of special interest, especially as most carcasses arrive in an advanced state of decomposition on the beach, making it difficult to determine the cause of death (Domit et al, 2022). The observations are also of special importance as programmes monitoring free‐ranging large whales are localized, and mostly dedicated to humpback and southern right whales migrating along the Brazilian coast.…”

Section: Discussionmentioning

confidence: 99%

A vessel collision report for Bryde's whales (Balaenoptera brydei) off the northern coast of São Paulo, Brazil

Athayde¹,

Cardoso²,

Francisco³

et al. 2022

Aquatic Conservation

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Vessel collisions are an important threat to several cetacean species, both large and small. In addition to negatively affecting the animals themselves, collisions can also damage or sink vessels, threatening both human safety and marine industry economics. Larger cetaceans seem to be the most affected by vessel collisions, and vessel strikes with Bryde's whales (Balaenoptera brydei/Balaenoptera edeni) have been reported worldwide. Long‐term photo‐identification research on Bryde's whales off the northern coast of the state of São Paulo, Brazil, has been continuing since 2016. Of the 67 individuals that were photo‐identified between 2004 and January 2022, three (4%) presented scars compatible with injuries from vessel propellers. These data contribute towards an understanding of the long‐term effects of collision injuries on the behaviour and survival of Bryde's whales. This report is intended to help inform the future evaluation of the conservation status of B. brydei off Brazil.

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“…No litoral de São Paulo, entre as ameaças, podemos citar as atividades portuárias com intensas ações de dragagem e tráfego marítimo (HAUSER-DAVIS et al, 2020). Somam-se, ainda, o setor de petróleo e gás e os impactos das áreas altamente urbanizadas com atividades industriais e turísticas, que ampliam a descarga de efluentes e resíduos químicos, causando outros impactos diretos e indiretos a fauna marinha (DOMIT et al, 2022;HAUSER-DAVIS et al, 2020).…”

Section: Outras Ameaçasunclassified

“…No caso das toninhas, estes efluentes podem causar imunossupressão, mudanças endócrinas, doenças neurológicas, alergias e câncer. Além disso, outros fatores como lixo marinho, poluição sonora e mudanças climáticas também são fatores impactantes sobre esta população (DOMIT et al, 2022).…”

Section: Outras Ameaçasunclassified

Pesca artesanal com emalhe de superfície e encalhes de megafauna

Jankowsky

Martins

Prado

et al. 2023

S&N

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A captura incidental é um tema de grande relevância mundial, permeado por conflitos entre interesses de conservação e pesca. Este conflito no Brasil relaciona-se especialmente ao regramento da pesca artesanal com emalhe de superfície e a captura incidental da megafauna. Para subsidiar a gestão e transformação desse conflito, analisou-se a relação entre desembarques da pesca artesanal com emalhe de superfície e os encalhes de megafauna com morte. Foram utilizados os bancos de dados do monitoramento pesqueiro e do monitoramento de praias de São Paulo entre 2015 e 2021, correspondentes a Chelonia mydas, Caretta caretta, Lepidochelys olivacea, Pontoporia blainvillei e Sotalia guianensis. As análises incluíram (i) panorama dos desembarques pesqueiros com emalhe de superfície e encalhes com mortes de cada espécie durante os anos (ii) testes de correlação entre as variáveis para regiões Norte, Centro e Sul (iii) análise de regressão para os municípios nas regiões que apresentaram correlação positiva estatisticamente significativa. A distribuição do número de desembarques não apresentou sobreposição com a distribuição dos encalhes. Nos testes de correlação, somente os encalhes de C. mydas, na região Norte e Sul, S. guianensis no Sul e P. blainvillei no Centro apontaram relação com os desembarques. A análise de regressão foi significativa para C. mydas e S. guianensis. Nos municípios, C. mydas apresentou resultado estatisticamente significativo em São Sebastião, Ubatuba, Ilha Comprida e Cananéia e S. guianensis em Cananéia. Entretanto, a regressão explicou uma pequena parte da mortalidade e outros fatores de impacto foram apontados. Recomenda-se medidas de ordenamento não proibitivas, estudos participativos e aplicação de métodos diretos de avaliação da interação da pesca com a megafauna, associado a fatores ambientais, bem como análises de outros impactos sobre a megafauna.

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Coastal development and habitat loss: understanding and resolving associated threats to the franciscana, Pontoporia blainvillei

Cited by 4 publications

References 124 publications

Survey of selected viral agents (herpesvirus, adenovirus and hepatitis E virus) in liver and lung samples of cetaceans, Brazil

Survey of selected viral agents (herpesvirus, adenovirus and hepatitis E virus) in liver and lung samples of cetaceans, Brazil

A vessel collision report for Bryde's whales (Balaenoptera brydei) off the northern coast of São Paulo, Brazil

Pesca artesanal com emalhe de superfície e encalhes de megafauna

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