Nematode community response to fish-farm impact in the western Mediterranean

Mirto, Simone; Rosa, T. La; Gambi, Cristina; Danovaro, Roberto; Mazzola, Antonio

doi:10.1016/s0269-7491(01)00140-3

Cited by 137 publications

(108 citation statements)

References 34 publications

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“…400 tons per year of production in a fish farm studied by MIRTO et al (2002), 1000ha of shrimp farm studied by NETTO and MEURER (2007) and 20ha of mussel farm with production of 1500 tons per year studied by NETTO and VALGAS (2010). As in our study, PINTO et al (2007) when studying the impact of a mussel farm in South Brazil with lower production (20 to 24 tons per year) also found no significant changes in meiobenthos community.…”

Section: Discussionsupporting

confidence: 68%

“…In areas such as the Amazonian region seasonal variations are specially important because of the strong variation in hydrodynamics, which could be responsible for the re-distribution of farming discharges. MIRTO et al (2002) and MIRTO et al (2012) are among the few studies that have investigated the effects of a Mediterranean fish farm on nematodes for longer periods, i.e., 7 and 10 months, respectively. These authors found strong differences between controls and impacted sites, but not between months.…”

Section: Discussionmentioning

confidence: 99%

“…Meiofauna has also been used in studies of environmental impact caused by worldwide farming, such as that of mussel farms (MIRTO et al, 2000;DANOVARO et al, 2004;PINTO et al, 2007;MAHMOUDI et al, 2008;VALGAS, 2010), fish farms (MAZZOLA et al, 1999;LA ROSA et al, 2001;MIRTO et al, 2002;SUTHERLAND et al, 2007;GREGO et al, 2009;RIERA et al, 2011;MIRTO et al, 2012;RIERA et al, 2012) and that of seaweed (ÓLAFSSON et al, 1995). These studies have used the whole meiofauna community, or isolated groups as Nematoda and Copepoda, and as a general rule the faunal responses are rather uniform with an initial enrichment in meiofaunal numbers and a decrease in diversity with an increase in the dominance of a few species (GIERE, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Nematodes as indicators of shrimp farm impact on an amazonian estuary (Curuçá, Pará, Brazil)

Venekey

Melo

2016

Braz. j. oceanogr.

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Shrimp farming reduces demand on wild fishery stocks and avoids environmental damage resulting from fishing practices, however, it has the potential to affect the water quality if not properly managed. In this study the impacts of a shrimp farm in an Amazonian estuary were evaluated, focusing on changes in nematodes regarding taxonomic composition, richness, density and diversity. Sampling was conducted in August 2004 (dry season) and January 2005 (rainy season) in the river at stations situated upstream and downstream at different distances from the main source of farm effluent discharge. Thirty-eight genera were recorded with Terschellingia dominating in the dry season and Terschellingia, Daptonema, Ptycholaimellus and Gomphionema in the rainy season. Abundances were within the range recorded in other estuaries and together with genera richness and diversity showed a strong temporal pattern with significantly higher values in the rainy season. No clear patterns of changes were observed at the stations. Some signs of organic enrichment were detected but they were not yet intense, probably a consequence of the strong local hydrodynamics and the age of the shrimp farm, which was just starting its operation. We recommend that in future studies on farming impacts a combination of factors, beyond the physical and chemical parameters of the water and sediments or taxonomic refinement, should be taken into accountsuch as the duration of the operation of the farm, the area occupied by ponds and the farm's production. Furthermore, we also believe that nematodes are a useful tool for evaluating aquaculture impacts due to the ease of sampling and because they are organisms at the base of marine food chain. A carcinocultura reduz a demanda de estoques pesqueiros naturais e evita o dano ambiental resultante da pesca. Entretanto, tem o potencial de afetar a qualidade da água quando não manejada apropriadamente. Nesse trabalho, os impactos de uma fazenda de carcinocultura foram avaliados em um estuário amazô-nico focando nas mudanças de composição taxonô-mica, riqueza, densidade e diversidade de Nematoda. A amostragem ocorreu em agosto de 2004 (período seco) e janeiro de 2005 (período chuvoso) a montante e jusante em locais situados a diferentes distâncias do principal local de descarga de efluentes da fazenda. Trinta e oito gêneros foram encontrados, com dominância de Terschellingia na estação seca e Terschellingia, Daptonema, Ptycholaimellus e Gomphionema na estação chuvosa. As abundâncias foram similares às encontradas em outros estuários e, juntamente com a riqueza e diversidade, apresentaram um forte padrão sazonal com valores significativamente maiores na estação chuvosa. Nas estações de coleta não foram encontrados padrões claros de mudanças. O estuário de Curuçá mostrou alguns sinais de enriquecimento orgânico ainda não intensos, provavelmente devido à forte hidrodinâmica local e à idade da fazenda, que recentemente começou suas atividades. Recomenda-se que no futuro os trabalhos sobre impactos de cultivo, além dos pa...

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nematodes as indicators of shrimp farm impact on an amazonian estuary (Curuçá, Pará, Brazil)

Venekey

Melo

2016

Braz. j. oceanogr.

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“…and Sabatieria sp., were productive and rapidly increased due to high value of organic matters. Mirto et al (2002) and Monthum (2002) found that some nematodes rapidly grew when organic matters increased. Another reason may be an effect of low oxygen.…”

Section: Figmentioning

confidence: 99%

“…Nematodes play a major role in nutrient mineralization and are also potential foods in the food web. In addition, nematode distributions are pollution bioindicator and a key group for environmental assessment (Alongi et al, 1983;Mirto et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Nematode Diversity at Thachin River Mouth, Samut Sakhon, Thailand

Sawangarreruks¹,

Yaowasooth²,

Poovachiranon³

2011

Publ. SMBL

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Nematode communities were investigated in January and June 2008 at the western Thachin River mouth, Samut Sakhon, Thailand. The sampling site is comprised of two different habitats, i.e. mangrove forest characterized by Avicennia marina and mudflat adjacent to the mangrove forest. Mean densities of the nematode ranged from 110 -995 ind.10 cm -2 while taxonomic classification showed 32 and 50 genera in the mudflat and mangrove forest, respectively. The high diversity indices of nematode assemblages were recorded in both habitats with values ranged between 0.49 -2.32 in mudflat and 2.02 -2.92 in mangrove. The predominant genera were Terschellingia sp. Daptonema sp. Sabatieria sp. and Hopperia sp. Two distinct groups of nematode communities between the two habitats were detected by multidimensional scaling, analyses of similarity percentages. The number of species and density were significantly different in the two different habitats (p < 0.05). The mangrove forest provided wide variety of microhabitat and physically stable environment while the mudflat area was exposed to water turbulence and prone to anthropogenic activities. The environmental differences of the two communities may have resulted in higher diversity and density of nematodes in the mangrove forest.

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