Bycatch of franciscana dolphins Pontoporia blainvillei and the dynamic of artisanal fisheries in the species' southernmost area of distribution

Na Argentina, a toninha é um dos cetáceos mais vulneráveis devido às capturas por rede de pesca artesanal. O presente estudo teve como objetivo estimar as capturas acidentais no sul da província de Buenos Aires, através de entrevistas aos capitães de barcos de pesca artesanal, entre os anos 2006-2009. As capturas foram reportadas para redes de emalhe e de camarão; com as mais altas frequências entre outubro e fevereiro, a 5 km da costa e 10-20 m de profundidade. A mortalidade acidental média anual estimada foi de 107 golfinhos (IC 95% = 87-129), 92 em redes de emalhe (IC 95% = 73-112) e 15 em redes de camarão (IC 95% = 8-25), com uma captura de 0,029 golfinhos/km de rede de emalhe (IC 95% = 0,023-0,036) e 0,024/rede de camarão (IC 95% = 0,012-0,035). As flutuações anuais responderam principalmente às diferenças nos dias de pesca. Considerando o último levantamento estimativo feito para o norte costeiro da província, estima-se uma mortalidade entre 360-539 golfinhos/ano em toda a província de Buenos Aires. Esses valores correspondem de 2,5-3,7% da abundância populacional da Argentina; o que traria como consequência um declínio populacional da espécie, tornando-se fundamental encontrar alternativas de pesca para a área.In Argentina, the franciscana dolphin is one of the most vulnerable cetaceans regularly entangled in coastal artisanal fishery nets. The aim of this paper is to estimate the species' incidental mortality on the Southern coast of Buenos Aires province through interviews with the captains of artisanal fishing vessels, in the period 2006-2009. Franciscana bycatch was reported for gillnets and shrimper gear all year round but it occurred more frequently between October and February, at 5 km offshore and 10-20 m depth. The estimated mean annual incidental mortality was 107 dolphins (CI 95% = 87-129), 92 caught in gillnets (CI 95% = 73-112) and 15 in shrimpers' gear (CI 95% = 8-25) with a capture per unit effort of 0.029 dolphins per km of gillnet (CI 95% = 0.023-0.036) and 0.022 per shrimpe r's net (CI 95% = 0.012-0.035). Annual fluctuations were due to differences in the number of gillnetting fishing days. If mortality estimates for the Northern coast are also taken into account, values attain a maximum of 360-539 dolphins bycaught in the entire Buenos Aires province, representing 2.5-3.7% of the species' abundance in Argentina. This will inevitably lead to the decline of franciscana dolphin populations in the near future unless alternative fishing grounds are identified and alternative gearadopted

Abundance of bottlenose dolphins, Tursiops truncatus (Cetacea: Delphinidae), inhabiting the Patos Lagoon estuary, southern Brazil: implications for conservation

A new mark-recapture abundance estimate and a photographic census were carried out to investigate the possible decline in the abundance of the bottlenose dolphins, Tursiops truncatus (Montagu, 1821), in the Patos Lagoon estuary due to the high levels of bycatch mortality which occurred between 2002 and 2006 in oceanic coastal areas close to the estuary. Fourteen systematic boat surveys were conducted between August and early December 2005 to photo-identify the bottlenose dolphins. The estimated number of animals, with long-lasting marks, in the population obtained from Chapman's and Mth models were 51 (95% CI = 49-53) and 52 (95% CI = 51-60), respectively. Taking into account the proportion of dolphins with long-lasting marks in the population, the total estimated population size ranged between 84 (95% CI = 76-93) and 86 (95% CI = 78-95) individuals, respectively, which was very similar to the 84 individuals revealed by the population census. Our results did not differ from the abundance estimate carried out in 1998, prior to the high fishing-related mortality event, suggesting that the population is stable. Plausible argument to explain the stability of the population is that some carcasses found on the oceanic coastal beaches near Patos Lagoon estuary come from animals that do not belong to the estuary community. Future studies should investigate fine-scale habitat partition between estuarine and adjacent coastal dolphins. If the existence of different communities living in close proximity (estuarine and coastal areas near to the estuary) is confirmed, a new abundance estimate is needed to access the conservation status of bottlenose dolphins in this region

Abundance estimate for a threatened population of franciscana dolphins in southern coastal Brazil: uncertainties and management implications

The franciscana dolphin has been considered the most threatened small cetacean in the south-western Atlantic Ocean due to gillnet by-catch. The estimation of the species’ abundance has been recommended as the highest research priority. A line transect aerial survey to estimate franciscana abundance in Rio Grande do Sul, southern Brazil, was carried out in February 2004.The overall surveyed area comprised 13,341 km2 and at least 20 transect lines. Abundance was estimated using distance sampling methods and assuming g(0) ¼ 0.304. The corrected density is 0.51 franciscanas/km2, resulting in an abundance estimation of 6839 franciscanas (CV ¼ 32%; 95% CI ¼ 3709–12,594) for the surveyed area in Rio Grande do Sul. To improve this estimate: (a) perception bias should be determined; (b) the parameters influencing availability bias should be identified and quantified; and (c) survey sample size should be increased. While the lack of data to correct for perception bias and group size underestimation in this aerial survey is likely to yield an underestimate of franciscana abundance, the use of surfacing and diving time data from boat and land-based surveys to correct for availability bias is likely to cause its overestimation. Alternative values of the g0 group-size estimates and rates of increase were incorporated in the analyses, creating 240 different estimates of annual increment for this franciscana population. Even in the most optimistic scenario, the annual increment of franciscanas is not sustainable with the current levels of by-catch in Rio Grande do Sul, and fishery management to reduce by-catch must be initiated promptly

geonetwork/geonetwork-ui: GeoNetwork-UI v2.0.1

<p>This release mainly contains bug fixes and minor improvements. Thanks to all contributors involved.</p> <h2>What's Changed</h2> <h3>Fixes & improvements</h3> <ul> <li>Remove technical words by @fvanderbiest in https://github.com/geonetwork/geonetwork-ui/pull/650</li> <li>Fix favorite star tooltip translation by @fgravin in https://github.com/geonetwork/geonetwork-ui/pull/653</li> <li>Fix CORS issues in webcomponent demo by @fgravin in https://github.com/geonetwork/geonetwork-ui/pull/655</li> <li>Datahub: Fix display of ESRI data on map by @tkohr in https://github.com/geonetwork/geonetwork-ui/pull/652</li> <li>Datahub: Display external viewer button correctly by @tkohr in https://github.com/geonetwork/geonetwork-ui/pull/656</li> <li>WebComponents: Fix dropdown-selector not showing by @jahow in https://github.com/geonetwork/geonetwork-ui/pull/658</li> <li>Datahub: Make font-sizes and colors same across the expandable panel by @Angi-Kinas in https://github.com/geonetwork/geonetwork-ui/pull/660</li> <li>Datahub: Change font style in expandable-panel by @Angi-Kinas in https://github.com/geonetwork/geonetwork-ui/pull/662</li> <li>Datahub: Change font-color and link style by @Angi-Kinas in https://github.com/geonetwork/geonetwork-ui/pull/664</li> </ul> <h3>Dependencies</h3> <ul> <li>chore(deps-dev): bump postcss from 8.4.27 to 8.4.31 by @dependabot in https://github.com/geonetwork/geonetwork-ui/pull/646</li> <li>chore(deps): bump @babel/traverse from 7.22.8 to 7.23.2 by @dependabot in https://github.com/geonetwork/geonetwork-ui/pull/654</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/geonetwork/geonetwork-ui/compare/v2.0.0...v2.0.1</p&gt

geonetwork/geonetwork-ui: GeoNetwork-UI v2.0.2

<p>This release mainly contains bug fixes and minor improvements. Thanks to all contributors involved.</p> <h2>What's Changed</h2> <h3>Fixes and improvements</h3> <ul> <li>Datahub: Display UpdateFrequencyCustom correctly by @jahow in https://github.com/geonetwork/geonetwork-ui/pull/683</li> <li>Datahub: Link detection with unknown mime type by @jahow in https://github.com/geonetwork/geonetwork-ui/pull/690</li> <li>Datahub: Fix abstract display in record preview in https://github.com/geonetwork/geonetwork-ui/pull/672</li> <li>Datahub: Links format filter filters out everything in https://github.com/geonetwork/geonetwork-ui/pull/668</li> <li>Datahub: Display record's update status correctly in https://github.com/geonetwork/geonetwork-ui/pull/679</li> </ul> <p><strong>Full Changelog</strong>: https://github.com/geonetwork/geonetwork-ui/compare/v2.0.1...v2.0.2</p&gt

Host-parasite relationship of ticks (Acari: Ixodidae and Argasidae) and feral pigs (Sus scrofa) in the Nhecolândia region of the Pantanal wetlands in Mato Grosso do Sul.

Feral pigs (S. scrofa) were introduced to the Pantanal region around 200 years ago and the population appears to be in expansion. Its eradication is considered to be impossible. The population of feral pigs in the Pantanal wetlands is currently estimated at one million. Two scientific excursions were organized. The first was conducted during the dry season, when 21 feral pigs were captured and the second was during the wet season, when 23 feral pigs were captured. Ticks were collected and the oviposition and hatching process were studied to confirm the biological success of each tick species. Three tick species were found to be feeding on feral pigs: Amblyomma cajennense, A. parvum, and Ornithodoros rostratus. During the dry season, 178 adult A. cajennense were collected, contrasting with 127 A. cajennense specimens in the wet season. This suggests that the seasonality of these ticks in the Brazilian Pantanal wetlands could be different from other regions. The results indicate that A. parvum and A. cajennense are biologically successful parasites in relation to feral pigs. A. cajennense appears to have adapted to this tick-host relationship, as well as the areas where feral pigs are abundant, and could play a role in the amplification of this tick population.201

Reproductive biology of female franciscana dolphins (Pontoporia blainvillei) from Argentina

The ovaries of 31 franciscana dolphins (19 immature and 12 mature) by-caught in coastal waters of Argentina were examinedto describe the reproductive biology. No ovarian polarity was found, both ovaries were functional and showed similaramounts of corpora. A positive trend was observed between the number of corpora and age (3?8 years old), indicatingthat ovulation scars are detectable for at least 4 years, and a ovulation rate of 0.39 was found for the sampled population.Age, length and weight at sexual maturity were estimated at 3.92+0.09 years, 133.47+ 11.11 cm and 32.68 +2.72 kg,respectively. The annual pregnancy rate was 0.36+0.02 (95% CI ¼ 0.10?0.65). The proportion of lactating and restingfemales found were 0.25 and 0.33 respectively. These outcomes constitute the first reproductive and life history informationon franciscana dolphins from the southernmost population and are important in relation with adequate conservation managementplans for this small cetacean.Fil: Panebianco, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: del Castillo, Daniela Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; ArgentinaFil: Denuncio, Pablo Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Negri, Maria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Bastida, Ricardo Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencia Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; ArgentinaFil: Failla, Mauricio. Fundación Cethus; ArgentinaFil: Vitullo, Alfredo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Maimónides; ArgentinaFil: Cappozzo, Humberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales ; Argentina. Universidad Maimónides; Argentin

Trabalho, globalização e contramovimentos: dinâmicas da ação coletiva do precariado artístico no Brasil e em Portugal

O artigo pretende construir uma comparação entre a formação do precariado pós-fordista no Brasil e em Portugal, a partir da análise dos padrões de proletarização do trabalho artístico nos dois países e sua relação com diferentes trajetórias de açãocoletiva, assim como a articulação com os novos movimentos de trabalhadores precarizados. Assim, destacaremos os dilemas enfrentados pelo movimento dos trabalhadores precários em transnacionalizar suas formas de ação coletiva. No caso brasileiro, analisamosespecificamente a mobilização por políticas públicas para a cultura que, distanciada da atuação sindical, desembocou na conquista do programa de Fomento ao Teatro; no caso português, analisamos a ação coletiva - que se consolida com a criação do sindicato-movimento Cena contra a perda de direitos trabalhistas num contexto marcado pela adoção de políticas de austeridade em escala europeia. Os limites da transnacionalização das reivindicações desses grupos de trabalhadores precários serão problematizados à luz da ideia muito presente nos novos estudos “neopolanyianos” do trabalho segundo a qual o processo de mobilização do precariado no Sul global anunciaria o advento de um contramovimento “embrionário” cuja tendência seria florescer conforme a mercantilizaçãoneoliberal ampliasse e aprofundasse as ameaças à classe trabalhadora em escala mundial.info:eu-repo/semantics/publishedVersio