An examination of the techniques used to capture mangrove crabs, Ucides cordatus , in the Mamanguape River estuary, northeastern Brazil, with implications for management

Nascimento, Douglas Macêdo; Alves, Ângelo Giuseppe Chaves; Alves, Rômulo Romeu Nóbrega; Barboza, Raynner Rilke Duarte; Diele, Karen; Mourão, José da Silva

doi:10.1016/j.ocecoaman.2016.05.010

Cited by 26 publications

(25 citation statements)

References 28 publications

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“…Such extractivism is characterized as the most significant conservation threat on the species (DIELE, 2005) and four main groups are involved: crab hunters, responsible for the capture of the crab; intermediaries, responsible for linking the first to the consumer market; restaurants and bars, which sell the product; and consumers (NORDI, 2009;NASCIMENTO et al, 2017). Although a simple activity, which can be done with no boats or with more complex tools, various techniques are employed to capture crabs: traps, which although prohibited by IBAMA throughout the national coast are still widely used; the braceamento method, which consists of manual removal of the crab from inside their galleries; and the tapamento, consisting of filling the gallery opening with mud or branches (NORDI, 2009;NASCIMENTO et al, 2011;NASCIMENTO et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

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The Defeso Moratorium Season for the Uçá Crab (Ucides Cordatus L.): An Analysis of Perception of Consumers and Vendors

2018

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Uçá-crab consumption is a cultural trait in Brazil, but overexploitation threats the species. The defeso is a moratorium aimed to protect the uçá - prohibiting capture/sell - but such strategy requires public support. The perception about the defeso among consumers/vendors in Recife - PE was analyzed indicating contradictions between declared concern and practices. Although 50% of vendors identified a decrease in supply and 88% declared concern, 50% did not know the crab´s minimum size for sell, 75% did not respect the defeso, and 50% had never heard about it. 76% of consumers declared concern, but 90% were not interested on crab´s origin and 53% did not know about defeso. People who claim to know the defeso defined it correctly, but 84% missed correct dates; 61% consumed crabs even during the defeso. Although > 95% of the public would like to know more about the defeso, such information is not reaching that public, weakening the strategy.

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Section: Discussionmentioning

confidence: 99%

“…NORDI, 1995;ALVES et al 2005;NORDI et al 2009). Such studies may also play an important role in the management and conservation of biodiversity (NISHIDA et al, 2006;ALVES, 2012;CAPISTRANO;LOPES, 2012;NASCIMENTO et al, 2012;NASCIMENTO et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

The Defeso Moratorium Season for the Uçá Crab (Ucides Cordatus L.): An Analysis of Perception of Consumers and Vendors

2018

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“…O uso em massa da redinha reflete a praticidade da técnica, que torna a captura do caranguejouçá mais rápida e menos desgastante para o catador. Nascimento et al (2016), afirmam que a substituição da técnica tradicional pela redinha também está atrelada a baixa produtividade no uso de outras técnicas e a retorno financeiro da espécie. Somada a natureza predatório do uso da redinha, foi identifica a poluição física que a mesma causa ao ambiente, uma vez que é facilmente visualizado enlaçados a vegetação ou flutuando no estuário fragmentos de redinhas.…”

Section: Cadeia Produtiva Do Caranguejo Uçá No Estuário Do Rio Mamangunclassified

Caranguejo Uçá (Ucides cordatus Linnaeus 1763): gestão sustentável do caranguejo uçá na APA/ARIE da Foz do Rio Mamanguape

Soares

Miranda

Mourão

2020

G. Sci.

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A eficiência das unidades de conservação (UC) acha-se no tipo de governança praticada e no estabelecimento dos instrumentos de gestão ambiental. A gestão das UC no Brasil preconiza um modelo participativo e compartilhado, contudo, seu exercício é um desafio para os órgãos ambientais. Assim, a presente estudo teve por objetivo avaliar as contribuições e participação dos catadores de caranguejo na gestão e manejo sustentável do caranguejo uçá (Ucides cordatus) na APA/ARIE da Foz do Rio Mamanguape, bem como a percepção deles sobre ao modelo de gestão. A metodologia se apoia na percepção e no conhecimento ecológico local, tratando-se de uma pesquisa quali quantitativa, com o uso das técnicas observação participante e entrevista semiestruturada. O estudo expõe a cadeia produtiva do caranguejo Uça na APA/ARIE da Foz do Rio Mamanguape e a participação do caranguejeiro no processo de gestão. Verificou-se que o manejo do Caranguejo–uçá praticada pelos catadores é feito dissociado da governança das unidades de conservação e que existe um distanciamento entre caranguejeiro, conselho gestor e ICMBIO. Dessa forma conclui-se que a gestão do recurso caranguejo uçá é do tipo centralizada e a política que norteia o manejo do recurso não atende os aspectos locais.

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“…It is however important to understand the functional role of U . cordatus in the mangrove ecosystem, given re-occurring crab population declines in North-eastern Brazil caused by a spreading fungal disease (“Lethargic crab disease” [23,24]) and increasing fishing pressure across the country due to the application of a new illegal capture technique [25]. U .…”

Section: Introductionmentioning

confidence: 99%

Mangrove Crab Ucides cordatus Removal Does Not Affect Sediment Parameters and Stipule Production in a One Year Experiment in Northern Brazil

et al. 2016

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Mangrove crabs influence ecosystem processes through bioturbation and/or litter feeding. In Brazilian mangroves, the abundant and commercially important crab Ucides cordatus is the main faunal modifier of microtopography establishing up to 2 m deep burrows. They process more than 70% of the leaf litter and propagule production, thus promoting microbial degradation of detritus and benefiting microbe-feeding fiddler crabs. The accelerated nutrient turn-over and increased sediment oxygenation mediated by U. cordatus may enhance mangrove tree growth. Such positive feed-back loop was tested in North Brazil through a one year crab removal experiment simulating increased harvesting rates in a mature Rhizophora mangle forest. Investigated response parameters were sediment salinity, organic matter content, CO2 efflux rates of the surface sediment, and reduction potential. We also determined stipule fall of the mangrove tree R. mangle as a proxy for tree growth. Three treatments were applied to twelve experimental plots (13 m × 13 m each): crab removal, disturbance control and control. Within one year, the number of U. cordatus burrows inside the four removal plots decreased on average to 52% of the initial number. Despite this distinct reduction in burrow density of this large bioturbator, none of the measured parameters differed between treatments. Instead, most parameters were clearly influenced by seasonal changes in precipitation. Hence, in the studied R. mangle forest, abiotic factors seem to be more important drivers of ecosystem processes than factors mediated by U. cordatus, at least within the studied timespan of one year.

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An examination of the techniques used to capture mangrove crabs, Ucides cordatus , in the Mamanguape River estuary, northeastern Brazil, with implications for management

Cited by 26 publications

References 28 publications

The Defeso Moratorium Season for the Uçá Crab (Ucides Cordatus L.): An Analysis of Perception of Consumers and Vendors

The Defeso Moratorium Season for the Uçá Crab (Ucides Cordatus L.): An Analysis of Perception of Consumers and Vendors

Caranguejo Uçá (Ucides cordatus Linnaeus 1763): gestão sustentável do caranguejo uçá na APA/ARIE da Foz do Rio Mamanguape

Mangrove Crab Ucides cordatus Removal Does Not Affect Sediment Parameters and Stipule Production in a One Year Experiment in Northern Brazil

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