RESUMO
Cetacean morbillivirus (CeMV; Paramyxoviridae) is the most significant pathogen of cetaceans worldwide. The novel "multi-host" Guiana dolphin (Sotalia guianensis; GD)-CeMV strain is reported in South American waters and infects Guiana dolphins and southern right whales (Eubalaena australis). This study aimed to describe the pathologic findings, GD-CeMV viral antigen distribution and detection by RT-PCR (reverse transcriptase polymerase chain reaction), and infectious comorbidities in 29 Guiana dolphins that succumbed during an unusual mass-mortality event in Rio de Janeiro state, Brazil, between November 2017 and March 2018. The main gross findings were lack of ingesta, pulmonary edema, ascites, icterus, hepatic lipidosis, multicentric lymphadenomegaly, as well as pneumonia, polyserositis, and multiorgan vasculitis caused by Halocercus brasiliensis. Microscopically, the primary lesions were bronchointerstitial pneumonia and multicentric lymphoid depletion. The severity and extent of the lesions paralleled the distribution and intensity of morbilliviral antigen. For the first time in cetaceans, morbilliviral antigen was detected in salivary gland, optic nerve, heart, diaphragm, parietal and visceral epithelium of glomeruli, vulva, and thyroid gland. Viral antigen within circulating leukocytes suggested this as a mechanism of dissemination within the host. Comorbidities included disseminated toxoplasmosis, mycosis, ciliated protozoosis, and bacterial disease including brucellosis. These results provide strong evidence for GD-CeMV as the main cause of this unusual mass-mortality event.
Assuntos
Golfinhos , Infecções por Morbillivirus , Morbillivirus , Animais , Brasil , Golfinhos/virologia , Feminino , Infecções por Morbillivirus/patologia , Infecções por Morbillivirus/veterináriaRESUMO
From November 2017 to March 2018, a cetacean morbillivirus (CeMV) outbreak caused an unprecedented mass mortality among Guiana dolphins Sotalia guianensis in Ilha Grande Bay and Sepetiba Bay, Rio de Janeiro, Brazil. Small boat surveys were conducted to document the behavior and clinical signs presented by diseased dolphins. We observed 5 abnormally behaving, disoriented Guiana dolphins on separate days, of which 1 died stranded and 2 sank. Signs of ataxia included difficulties with swimming and maintaining a course, balance and buoyancy. At least 40 other individuals were emaciated, and 10 photo-identified dolphins had miscellaneous skin lesions, some ulcerated. Labored breathing suggestive of airway obstruction was heard in several groups. These neurological, respiratory and cutaneous signs may comprise part of the clinical constellation of CeMV infection in dolphins. The combined threat of anthropogenic pressures and CeMV lethal disease is of concern for the survival of the Guiana dolphin population in Sepetiba Bay.
Assuntos
Golfinhos , Infecções por Morbillivirus , Morbillivirus , Animais , Baías , Brasil , Infecções por Morbillivirus/epidemiologia , Infecções por Morbillivirus/veterináriaRESUMO
The present study evaluates variations in frequency and duration parameters of whistles of four dolphin species (Sotalia guianensis, Steno bredanensis, Stenella frontalis, and Tursiops truncatus), recorded in the Rio de Janeiro State Coast, Southeastern Brazil. A total of 487 whistles were analyzed. Acoustic parameters of the whistles were classified to species by discriminant function analysis. Overall classification score was 72.5%, with the highest classification score obtained for whistles of S. bredanensis and the lowest obtained for S. frontalis. Most differences were among S. bredanensis and S. guianensis, species that did not have their repertoires compared in other studies.
Assuntos
Golfinhos/fisiologia , Vocalização Animal , Acústica , Animais , Golfinho Nariz-de-Garrafa/classificação , Golfinho Nariz-de-Garrafa/fisiologia , Brasil , Análise Discriminante , Golfinhos/classificação , Análise de Fourier , Especificidade da Espécie , Stenella/classificação , Stenella/fisiologia , Vocalização Animal/classificaçãoRESUMO
We report on the epidemiology of lobomycosis-like disease (LLD), a cutaneous disorder evoking lobomycosis, in 658 common bottlenose dolphins Tursiops truncatus from South America and 94 Indo-Pacific bottlenose dolphins T. aduncus from southern Africa. Photographs and stranding records of 387 inshore residents, 60 inshore non-residents and 305 specimens of undetermined origin (inshore and offshore) were examined for the presence of LLD lesions from 2004 to 2015. Seventeen residents, 3 non-residents and 1 inshore dolphin of unknown residence status were positive. LLD lesions appeared as single or multiple, light grey to whitish nodules and plaques that may ulcerate and increase in size over time. Among resident dolphins, prevalence varied significantly among 4 communities, being low in Posorja (2.35%, n = 85), Ecuador, and high in Salinas, Ecuador (16.7%, n = 18), and Laguna, Brazil (14.3%, n = 42). LLD prevalence increased in 36 T. truncatus from Laguna from 5.6% in 2007-2009 to 13.9% in 2013-2014, albeit not significantly. The disease has persisted for years in dolphins from Mayotte, Laguna, Salinas, the Sanquianga National Park and Bahía Málaga (Colombia) but vanished from the Tramandaí Estuary and the Mampituba River (Brazil). The geographical range of LLD has expanded in Brazil, South Africa and Ecuador, in areas that have been regularly surveyed for 10 to 35 yr. Two of the 21 LLD-affected dolphins were found dead with extensive lesions in southern Brazil, and 2 others disappeared, and presumably died, in Ecuador. These observations stress the need for targeted epidemiological, histological and molecular studies of LLD in dolphins, especially in the Southern Hemisphere.
Assuntos
Golfinho Nariz-de-Garrafa , Lobomicose/veterinária , Animais , Oceano Atlântico/epidemiologia , Lobomicose/epidemiologia , Lobomicose/patologia , Moçambique/epidemiologia , Oceano Pacífico/epidemiologia , África do Sul/epidemiologia , América do Sul/epidemiologiaRESUMO
Guiana dolphins, Sotalia guianensis, are vulnerable to extinction along their distribution on the Brazilian coast and assessing chemical pollution is of utmost importance for their conservation. For this study, 51 carcasses of Guiana dolphins were sampled across the Brazilian coast to investigate legacy and emerging brominated flame retardants (BFRs) as well as the naturally-produced MeO-BDEs. PBDEs and MeO-BDEs were detected in all samples analyzed, whereas emerging BFRs were detected in 16 % of the samples, all in Rio de Janeiro state. PBDE concentrations varied between 2.24 and 799 ng.g-1 lipid weight (lw), emerging BFRs between 0.12 and 1.51 ng.g-1 lw and MeO-BDEs between 3.82 and 10,247 ng.g-1 lw. Concentrations of legacy and emerging BFRs and natural compounds varied considerably according to the sampling site and reflected both the local anthropogenic impact of the region and the diversity/mass of biosynthesizers. The PBDE concentrations are lower than what was found for delphinids in the Northern Hemisphere around the same sampling period and most sampling sites presented mean concentrations lower than the limits for endocrine disruption known to date for marine mammals of 460 ng.g-1 lw, except for sampled from Santa Catarina state, in Southern Brazil. Conversely, MeO-BDE concentrations are higher than those of the Northern Hemisphere, particularly close to the Abrolhos Bans and Royal Charlotte formation, that are hotspots for biodiversity. Despite the elevated concentrations reported for this group, there is not much information regarding the effects of such elevated concentrations for these marine mammals. The distinct patterns observed along the Brazilian coast show that organobrominated compounds can be used to identify the ecological segregation of delphinids and that conservation actions should be planned considering the local threats.
Assuntos
Golfinhos , Retardadores de Chama , Animais , Retardadores de Chama/análise , Brasil , Monitoramento Ambiental , Cetáceos , Éteres Difenil Halogenados/análiseRESUMO
A previous investigation of our research team has demonstrated the suitability of using hepatic total tin (ΣSn) concentrations for evaluating dolphin exposure to organotins (OTs). The present study develops the previous technique into three different approaches that comprise data: (1) on hepatic ΣSn concentrations of 121 Guiana dolphins (Sotalia guianensis) from five different coastal areas (CAs): (2) on ΣSn, δ13C and δ15N for 40 dolphins from Rio de Janeiro state (RJ), including ten different delphinid species; as well as (3) on hepatic ΣSn concentrations and δ15N values on 31 individuals from five different fish species from Sepetiba Bay (SB, Rio de Janeiro-RJ, Brazil). Hepatic ΣSn concentrations of Guiana dolphins from Guanabara Bay (GB, RJ) were significantly higher than those found in other four CAs from S and SE Brazilian regions. Significant positive correlations were found between ΣSn concentrations and δ13C data in delphinid species, demonstrating a coast-ocean gradient in dolphin exposure to OTs in RJ state. Significant and positive correlations were observed between ΣSn concentrations and both δ15N and Trophic Position (TP) values of fish, as well as high values were found for Trophic Magnification Factor (TMF = 3.03) and Trophic Magnification Slope (TMS = 0.14), demonstrating OT biomagnification in SB ichthyofauna.
Assuntos
Golfinhos , Poluentes Químicos da Água , Animais , Bioacumulação , Brasil , Proteínas de Ligação a DNA , Monitoramento Ambiental , Peixes , Isótopos , Estanho , Poluentes Químicos da Água/análiseRESUMO
The presence of pyrethroid compounds in hepatic tissue of Guiana dolphins (Sotalia guianensis) is reported for the first time. Twelve pyrethroids were determined in 50 animals from eight locations of the Brazilian coast. The highest average concentration of total pyrethroids (∑PYR) was 1166 ng.g-1 lw, with values ranging from 148 to 5918 ng.g-1 lw, in Ilha Grande Bay, Rio de Janeiro State, while the Espírito Santo State had the highest median, 568 ng.g-1 lw. Permethrin was the predominant compound in most areas, contributing for 42% to 81% of the ∑PYR, whereas cypermethrin was the most abundant compound in Guanabara and Sepetiba bays (79% and 81%, respectively), both located in Rio de Janeiro State. Biological factors were not correlated with pyrethroids concentration. Tetramethrin and es/fenvalerate compounds were negatively correlated to the age, suggesting degradation/metabolization capacity in these animals that increases throughout life. Despite being metabolized and excreted, the wide use of these pollutants is reflected in relevant concentrations found in Guiana dolphins. This is the first study evaluating pyrethroids in a representative number of hepatic samples and covering >2600 km of coast. The overall lack of information on pyrethroids in cetaceans highlights the importance of understanding the profile and distribution of these pollutants in dolphins which exclusively inhabit the Southwestern Atlantic coast.
Assuntos
Golfinhos , Inseticidas , Piretrinas , Poluentes Químicos da Água/análise , Animais , Brasil , Biomarcadores AmbientaisRESUMO
The presence of tattoo skin disease (TSD) was examined in 1392 free-ranging and dead odontocetes comprising 17 species from the Americas, Europe, South Africa, New Zealand and Greenland. We investigated whether TSD prevalence varied with sex, age and health status. TSD was encountered in cetaceans from the Pacific and Atlantic Oceans as well as in those from the North, Mediterranean and Tasman Seas. No clear patterns related to geography and host phylogeny were detected, except that prevalence of TSD in juveniles and, in 2 species (dusky dolphin Lagenorhynchus obscurus and Burmeister's porpoise Phocoena spinipinnis), in adults was remarkably high in samples from Peru. Environmental factors and virus properties may be responsible for this finding. Sex did not significantly influence TSD prevalence except in the case of Peruvian P. spinipinnis. Generally, there was a pattern of TSD increase in juveniles compared to calves, attributed to the loss of maternal immunity. Also, in most samples, juveniles seemed to have a higher probability of suffering TSD than adults, presumably because more adults had acquired active immunity following infection. This holo-endemic pattern was inverted in poor health short-beaked common dolphins Delphinus delphis and harbour porpoises Phocoena phocoena from the British Isles, and in Chilean dolphins Cephalorhynchus eutropia from Patagonia, where adults showed a higher TSD prevalence than juveniles. Very large tattoos were seen in some adult odontocetes from the SE Pacific, NE Atlantic and Portugal's Sado Estuary, which suggest impaired immune response. The epidemiological pattern of TSD may be an indicator of cetacean population health.
Assuntos
Cetáceos/fisiologia , Infecções por Poxviridae/epidemiologia , Dermatopatias/epidemiologia , Distribuição por Idade , Doenças dos Animais/epidemiologia , Doenças dos Animais/virologia , Animais , Chordopoxvirinae/fisiologia , Feminino , Masculino , Fatores Sexuais , Dermatopatias/virologiaRESUMO
Cetacean morbillivirus (CeMV) is a major natural cause of morbidity and mortality in cetaceans worldwide and results in epidemic and endemic fatalities. The pathogenesis of CeMV has not been fully elucidated, and questions remain regarding tissue tropism and the mechanisms of immunosuppression. We compared the histopathologic and viral immunohistochemical features in molecularly confirmed CeMV-infected Guiana dolphins (Sotalia guianensis) from the Southwestern Atlantic (Brazil) and striped dolphins (Stenella coeruleoalba) and bottlenose dolphins (Tursiops truncatus) from the Northeast-Central Atlantic (Canary Islands, Spain) and the Western Mediterranean Sea (Italy). Major emphasis was placed on the central nervous system (CNS), including neuroanatomical distribution of lesions, and the lymphoid system and lung were also examined. Eleven Guiana dolphins, 13 striped dolphins, and 3 bottlenose dolphins were selected by defined criteria. CeMV infections showed a remarkable neurotropism in striped dolphins and bottlenose dolphins, while this was a rare feature in CeMV-infected Guiana dolphins. Neuroanatomical distribution of lesions in dolphins stranded in the Canary Islands revealed a consistent involvement of the cerebrum, thalamus, and cerebellum, followed by caudal brainstem and spinal cord. In most cases, Guiana dolphins had more severe lung lesions. The lymphoid system was involved in all three species, with consistent lymphoid depletion. Multinucleate giant cells/syncytia and characteristic viral inclusion bodies were variably observed in these organs. Overall, there was widespread lymphohistiocytic, epithelial, and neuronal/neuroglial viral antigen immunolabeling with some individual, host species, and CeMV strain differences. Preexisting and opportunistic infections were common, particularly endoparasitism, followed by bacterial, fungal, and viral infections. These results contribute to understanding CeMV infections in susceptible cetacean hosts in relation to factors such as CeMV strains and geographic locations, thereby establishing the basis for future neuro- and immunopathological comparative investigations.
Assuntos
Cetáceos/virologia , Infecções por Morbillivirus/veterinária , Morbillivirus , Animais , Golfinho Nariz-de-Garrafa/virologia , Sistema Nervoso Central/patologia , Sistema Nervoso Central/virologia , Golfinhos/virologia , Feminino , Pulmão/patologia , Pulmão/virologia , Tecido Linfoide/patologia , Tecido Linfoide/virologia , Masculino , Infecções por Morbillivirus/imunologia , Infecções por Morbillivirus/patologia , Especificidade da Espécie , Stenella/virologiaRESUMO
Cetacean morbillivirus (CeMV; Paramyxoviridae) causes epizootic and interepizootic fatalities in odontocetes and mysticetes worldwide. Studies suggest there is different species-specific susceptibility to CeMV infection, with striped dolphins (Stenella coeruleoalba), bottlenose dolphins (Tursiops truncatus), and Guiana dolphins (Sotalia guianensis) ranking among the most susceptible cetacean hosts. The pathogenesis of CeMV infection is not fully resolved. Since no previous studies have evaluated the organ-specific immunopathogenetic features of CeMV infection in tissues from infected dolphins, this study was aimed at characterizing and comparing immunophenotypic profiles of local immune responses in lymphoid organs (lymph nodes, spleen), lung and CNS in CeMV-molecularly (RT-PCR)-positive cetaceans from Western Mediterranean, Northeast-Central, and Southwestern Atlantic. Immunohistochemical (IHC) analyses targeted molecules of immunologic interest: caspase 3, CD3, CD20, CD57, CD68, FoxP3, MHCII, Iba1, IFNγ, IgG, IL4, IL10, lysozyme, TGFß, and PAX5. We detected consistent CeMV-associated inflammatory response patterns. Within CNS, inflammation was dominated by CD3+ (T cells), and CD20+ and PAX5+ (B cells) lymphocytes, accompanied by fewer Iba1+, CD68+, and lysozyme+ histiocytes, mainly in striped dolphins and bottlenose dolphins. Multicentric lymphoid depletion was characterized by reduced numbers of T cells and B cells, more pronounced in Guiana dolphins. Striped dolphins and bottlenose dolphins often had hyperplastic (regenerative) phenomena involving the aforementioned cell populations, particularly chronically infected animals. In the lung, there was mild to moderate increase in T cells, B cells, and histiocytes. Additionally, there was a generalized increased expression of caspase 3 in lymphoid, lung, and CNS tissues. Apoptosis, therefore, is believed to play a major role in generalized lymphoid depletion and likely overt immunosuppression during CeMV infection. No differences were detected regarding cytokine immunoreactivity in lymph nodes, spleen, and lung from infected and non-infected dolphins by semiquantitative analysis; however, there was striking immunoreactivity for IFNγ in the CNS of infected dolphins. These novel results set the basis for tissue-specific immunophenotypic responses during CeMV infection in three highly susceptible delphinid species. They also suggest a complex interplay between viral and host's immune factors, thereby contributing to gain valuable insights into similarities, and differences of CeMV infection's immunopathogenesis in relation to body tissues, CeMV strains, and cetacean hosts.
Assuntos
Golfinhos/imunologia , Infecções por Morbillivirus/veterinária , Morbillivirus/imunologia , Animais , Oceano Atlântico , Sistema Nervoso Central/imunologia , Sistema Nervoso Central/patologia , Citocinas/biossíntese , Citocinas/genética , Feminino , Imuno-Histoquímica , Pulmão/imunologia , Pulmão/patologia , Tecido Linfoide/imunologia , Tecido Linfoide/patologia , Masculino , Mar Mediterrâneo , Infecções por Morbillivirus/imunologia , Infecções por Morbillivirus/patologia , Inclusão em Parafina , Especificidade da Espécie , Fixação de TecidosRESUMO
La investigación tiene como objetivo identificar las creencias whistleblowers sobre la denuncia de presuntos delitos financieros, segmentados en los contextos hispanoamericano y brasileño. Las entrevistas se prospectaron con 50 profesionales de negocios de 14 países latinoamericanos, utilizando el protocolo de Ajzen (2006) para investigar los determinantes de las creencias de los denunciantes. El análisis de contenido de las respuestas permitió identificar las creencias regionales de los resultados favorables y desfavorables de un informe potencial, los referentes relevantes que se pueden comparar y los controles percibidos que permiten y facilitan u obstaculizan el desempeño del comportamiento de los denunciantes. La evidencia recopilada contribuye a la literatura, las organizaciones y los investigadores criminales, señalando las creencias locales que pueden usarse para influir, medir y predecir el comportamiento local de los denunciantes.
Assuntos
Criminologia , Denúncia de IrregularidadesRESUMO
Resumo Esta pesquisa tem por objetivo evidenciar os efeitos direto e indireto do tamanho no desempenho dos municípios de Santa Catarina, em razão da discussão acadêmica quanto ao tamanho do município afetar o desempenho deste. Analisaram-se todos os municípios do estado de Santa Catarina, no período de 2005 a 2016, compreendendo três períodos eleitorais. A amostra é de 3.504 observações, com 293 municípios, no período de 12 anos. A análise de dados em painel foi estimada por mínimos quadrados generalizados factíveis (MQGF). Observa-se nos resultados indícios de que o tamanho afeta de forma direta e positiva o desempenho municipal e de forma indireta quando associado com a escolaridade do prefeito. Assim, nos municípios catarinenses, quanto maior for a população, maior será o IPTU arrecado per capita. E quanto maior for o tamanho da população associado a prefeitos com maior grau de escolaridade, maior será o desempenho municipal. Quando o desempenho é medido pelo percentual do IPTU arrecadado da receita fiscal total, não há efeito do tamanho e do tamanho associado à capacidade do prefeito no desempenho.
Resumen Ante la discusión académica en cuanto a si el tamaño del municipio afecta el desempeño, esta investigación tiene por objetivo evidenciar el efecto directo e indirecto del tamaño en el desempeño de los municipios de Santa Catarina. Se analizaron todos los municipios del estado de Santa Catarina, en el período de 2005 a 2016, comprendiendo tres períodos electorales. La muestra es de 3.504 observaciones, con 293 municipios, en el período de 12 años. El análisis de datos en panel fue estimado por los mínimos cuadrados generalizados factibles (MCGF). En los resultados se observan indicios de que el tamaño afecta de forma directa y positiva el desempeño municipal y de forma indirecta cuando es asociado a la escolaridad del alcalde. Así, en los municipios catarinenses cuanto mayor sea la población mayor será el IPTU (impuesto sobre la propiedad y territorial urbano) recaudado per cápita y cuanto mayor el tamaño de la población asociado a alcaldes con mayor grado de escolaridad mayor será el desempeño municipal. Cuando el rendimiento se mide por el porcentaje del IPTU recaudado del ingreso fiscal total no hay efecto del tamaño y del tamaño asociado a la capacidad del alcalde en el desempeño.
Abstract This research shows the direct and indirect effects of size on the performance of the Brazilian municipalities in the state of Santa Catarina, considering the academic debate around the issue. The research examined all municipalities of the state from 2005 to 2016, a period that comprised three municipal elections. The study sample consisted of 3,504 observations, with 293 municipalities, during these 12 years. The panel data analysis was estimated by Feasible Generalized Least Squares (FGLS). The results suggest that size affects municipal performance positively and directly. Also, size influences indirectly when considering the mayor's schooling, i.e., the larger the municipality and the higher the mayor's schooling, the better the municipal performance. The analysis of performance based on municipal tax (IPTU) collected per capita showed that, the larger the population, the higher the IPTU per capita, which means that larger municipalities tend to show better performance. Finally, the analysis of performance based on the percentage of IPTU levied from total tax revenue showed that size and size associated with the mayor's capability did not affect performance.
Assuntos
Cidades , Setor Público , EficiênciaRESUMO
Pyrethroids (PYR) and UV filters (UVF) were investigated in tissues of paired mother-fetus dolphins from Brazilian coast in order to investigate the possibility of maternal transfer of these emerging contaminants. Comparison of PYR and UVF concentrations in maternal and fetal blubber revealed Franciscana transferred efficiently both contaminants to fetuses (F/M > 1) and Guiana dolphin transferred efficiently PYR to fetuses (F/M > 1) different than UVF (F/M < 1). PYR and UVF concentrations in fetuses were the highest-ever reported in biota (up to 6640 and 11,530 ng/g lw, respectively). Muscle was the organ with the highest PYR and UVF concentrations (p < 0.001), suggesting that these two classes of emerging contaminants may have more affinity for proteins than for lipids. The high PYR and UVF concentrations found in fetuses demonstrate these compounds are efficiently transferred through placenta. This study is the first to report maternal transfer of pyrethroids and UV filters in marine mammals.
Assuntos
Golfinhos/metabolismo , Inseticidas/farmacocinética , Troca Materno-Fetal , Piretrinas/farmacocinética , Protetores Solares/farmacocinética , Poluentes Químicos da Água/farmacocinética , Tecido Adiposo/metabolismo , Animais , Brasil , Golfinhos/embriologia , Feminino , Inseticidas/análise , Exposição Materna , Placenta/metabolismo , Gravidez , Piretrinas/análise , Protetores Solares/análise , Distribuição Tecidual , Poluentes Químicos da Água/análiseRESUMO
Abstract: Cetaceans were monitored along ca. 700 km of the southeast coast of Brazil (22°S to 25°S) from 1995 to 2014 using photo-identification. The objective of this study was to identify any presence of long-distance movements for monitored cetacean species and discuss implications. Data on long-range movements of four of the monitored species are presented after the analysis of 321,765 photographs taken for individual identification. Seven individuals from four populations of Guiana dolphins (Sotalia guianensis) considered resident to particular estuaries or bays were reported in dispersal involving movement between pairs of protected areas over long-range distances varying between 86 and 135 km. Three cataloged rough-toothed dolphins (Steno bredanensis), first seen in Guanabara Bay, Rio de Janeiro state (22°46'S) in November 2011, were sighted 240 km southwards as members of the same group in coastal waters of São Paulo state (23°46'S) in July 2014. Water depth for those sightings ranged from 16 to 52.7 m; local sightings of rough-toothed dolphins in Brazil have frequently been in shallow waters, but the species global distribution is usually associated with deeper waters. In a 27-day interval in the spring of 2012, a group of 16 orcas (Orcinus orca) travelled ca. 277 km in shallow coastal waters ranging from 20 to 30 m deep. Orcas are commonly observed between November and February in southeast Brazil, probably in search for prey. In summer months between 2012 and 2014, three Bryde's whales (Balaenoptera edeni) sighted in waters ranging from 14 to 49 m deep, moved between 218 and 327 km. Bryde's whales are usually found in local coastal waters where they spend summer months feeding on sardines. To date, these are the longest estimated movements reported to S. guianensis, S. bredanensis, O. orca and B. edeni in the Southwestern Atlantic Ocean.
Resumo: Cetáceos foram monitorados em cerca de 700 km da costa sudeste do Brasil (22°S a 25°S) entre 1995 e 2014 com o uso da fotoidentificação. O objetivo deste estudo foi de identificar quaisquer presenças de movimentos de longa distância de indivíduos das espécies monitoradas e discutir suas implicações. Dados de movimentos de longa distância de quatro das espécies monitoradas são apresentados após a análise de 321.765 fotos obtidas para identificações individuais. Sete indivíduos de quatro populações de boto-cinza (Sotalia guianensis) consideradas residentes a estuários e baías particulares foram reportados em movimentos de dispersão envolvendo pares de áreas protegidas em distâncias que variaram entre 86 e 135 km. Três golfinhos-de-dentes-rugosos (Steno bredanensis) catalogados e avistados primeiramente na Baía de Guanabara, Rio de Janeiro (22°46'S), em novembro de 2011, foram avistados 240 km mais ao sul como membros de um mesmo grupo nas águas costeiras do Estado de São Paulo (23°46'S) em julho de 2014. A profundidade da água onde essas avistagens aconteceram variou entre 16 e 52,7 m; avistagens de golfinhos-de-dentes-rugosos têm sido efetuadas em águas rasas na costa sudeste do Brasil, embora a distribuição global da espécie esteja associada a águas profundas. Em um intervalo de 27 dias na primavera de 2012, um grupo de 16 orcas (Orcinus orca) se desclocou cerca de 277 km em águas rasas variando entre 20 e 30 m. Orcas são comumente avistadas entre novembro e fevereiro no sudeste do Brasil, possivelmente em busca de presas. Nos meses de verão entre 2012 e 2014, três baleias-de-Bryde (Balaenoptera edeni) avistadas em águas de 14 a 49 m de profundidade, moveram-se entre 218 e 327 km. baleias-de-Bryde são encontradas em águas costeiras locais onde passam os meses de verão se alimentando de sardinhas. Até o presente momento, esses são os deslocamentos estimados como os de maiores distâncias observados para S. guianensis, S. bredanensis, O. orca and B. edeni no Atlântico Sudoeste.
RESUMO
To investigate the foraging habitats of delphinids in southeastern Brazil, we analyzed stable carbon (δ(13)C) and nitrogen (δ(15)N) isotopes in muscle samples of the following 10 delphinid species: Sotalia guianensis, Stenella frontalis, Tursiops truncatus, Steno bredanensis, Pseudorca crassidens, Delphinus sp., Lagenodelphis hosei, Stenella attenuata, Stenella longirostris and Grampus griseus. We also compared the δ(13)C and δ(15)N values among four populations of S. guianensis. Variation in carbon isotope results from coast to ocean indicated that there was a significant decrease in δ(13)C values from estuarine dolphins to oceanic species. S. guianensis from Guanabara Bay had the highest mean δ(13)C value, while oceanic species showed significantly lower δ(13)C values. The highest δ(15)N values were observed for P. crassidens and T. truncatus, suggesting that these species occupy the highest trophic position among the delphinids studied here. The oceanic species S. attenuata, G. griseus and L. hosei had the lowest δ(15)N values. Stable isotope analysis showed that the three populations of S. guianensis in coastal bays had different δ(13)C values, but similar δ(15)N results. Guiana dolphins from Sepetiba and Ilha Grande bays had different foraging habitat, with specimens from Ilha Grande showing more negative δ(13)C values. This study provides further information on the feeding ecology of delphinids occurring in southeastern Brazil, with evidence of distinctive foraging habitats and the occupation of different ecological niches by these species in the study area.
Assuntos
Isótopos de Carbono/análise , Golfinhos/fisiologia , Ecossistema , Comportamento Alimentar/fisiologia , Músculo Esquelético/química , Isótopos de Nitrogênio/análise , Animais , Brasil , Estado NutricionalRESUMO
No presente artigo analisou-se como uma revista popular de negócios tem abordado o sofrimento psíquico no trabalho contemporâneo, a partir de uma pesquisa exploratório-descritiva. Para tanto, tomou-se como material de análise doze edições da Revista Você S/A veiculadas no período de julho de 2005 a junho de 2006. Da análise empreendida (Minayo, 1994) emergiram três categorias centrais à temática: as causas do sofrimento; suas consequências para os indivíduos e as organizações; e os indicadores de prevenção e manutenção da saúde. Como resultado da pesquisa, ressalta-se que os indivíduos têm sido apresentados como os responsáveis únicos pelo sofrimento no trabalho. Sob esse enfoque, questões relativas às vivências dos sentimentos de insegurança e incertezas, do aumento da competitividade e da hipersolicitação têm sido apresentadas em diversas reportagens que enaltecem dicas prescritivas sobre como superar o sofrimento sem, entretanto, discutir suas causas fora dos indivíduos.
The present article aims to analyze how the Magazine Você S/A approaches the thematic of psychic suffering in contemporary work. the study is based on an exploratory-descriptive research, and twelve editions of the Magazine Você S/A, from the period of July of 2005 until June of 2006 have been analyzed. Due to the analysis (Minayo, 1994), three main categories emerged: the causes of the suffering; its consequences for individuals and for organizations; indicators of health prevention and maintenance. As results of the research, it is emphasized that the individuals are presented as the only responsible for the suffering at work. It has also concluded that subjects such as the experiences of insecurity and uncertainness feelings, the increase of the competitiveness and big solicitation, are presented in many articles of the magazine. these articles praise prescriptive tips to overcome suffering without arguing the causes that generate suffering beyond the individual sphere.