Influence of net cage farming on the diet of associated wild fish in a Neotropical reservoir

Demetrio, Jose Antonio; Gomes, Luiz Carlos; Latini, João Dirço; Agostinho, Ângelo Antônio

doi:10.1016/j.aquaculture.2011.11.026

Cited by 36 publications

(38 citation statements)

References 22 publications

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“…The effluent can induce eutrophication processes (Penczak et al, 1982;Weston, 1991), such as increases in algal biomass and changes in the abundance of the phytoplankton of the local community (Honkanen and Helminen, 2000;Karakassis et al, 2005;), organic enrichment of sediment (Carrol et al, 2003;Honkanen and Helminen, 2000;Karakassis et al, 2002;Nickell et al, 2003;Pawar et al, 2002;Yucel-Gier et al, 2007), attraction of wild fish (Beveridge, 2004;Boyra et al, 2004;Dempster et al, 2002;Giannoulaki et al, 2005;Machias et al, 2004Machias et al, , 2005Machias et al, , 2006 and increased abundance of the benthonic community (Honkanen and Helminen, 2000;Karakassis et al, 2000;Nickell et al, 2003;Yucel-Gier et al, 2007). The effluent can also become a food source for local biota (Beveridge, 2004;Demétrio et al, 2012;Håkanson, 2005;Ramos et al, 2008), causing ecological changes in these systems (Beveridge, 2004;Håkanson, 2005;Ramos et al, 2008;Weston, 1991).…”

Section: Introductionmentioning

confidence: 95%

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Interference of cage fish farm on diet, condition factor and numeric abundance on wild fish in a Neotropical reservoir

Ramos¹,

Brandão²,

Zanatta³

et al. 2013

Aquaculture

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Section: Introductionmentioning

confidence: 95%

“…These impacts have induced the loss of biodiversity in aquatic biota. Currently, new impacts are caused by the increasing use of cage fish farming in public waters, and their effects have not yet been elucidated (Demétrio et al, 2012;Ramos et al, 2008).…”

Section: Introductionmentioning

confidence: 97%

Interference of cage fish farm on diet, condition factor and numeric abundance on wild fish in a Neotropical reservoir

Ramos¹,

Brandão²,

Zanatta³

et al. 2013

Aquaculture

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“…In this intensive system of cultivation, high densities are essential to increase productivity (Barcellos et al, 2004;Demétrio et al, 2012). Studies indicate that there is an inverse relationship between density and growth of fish when stocked at a very high density, and that maximum growth is generally obtained at an intermediate stocking density that also provides a reasonable survival percentage (Chakraborty et al, 2010).…”

mentioning

confidence: 99%

Growth and stress of dourado cultivated in cages at different stocking densities

Braun

Dafré

Lima

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the growth and the stress levels of juvenile dourado (Salminus brasiliensis) cultivated in cages. Fish stocked at densities of 15 (D15) and 30 (D30) fish per square meter were evaluated in a completely randomized design with three replicates. Fish were fed twice a day with extruded ration (42% crude protein). Density influenced only biomass and daily food intake, and glucose and lactate concentrations increased over time. D15 and D30 did not influence the growth of dourado. However, the increase of glucose and lactate levels over time indicates that cultivation in cages is a stressful condition for this species.Index terms: Salminus brasiliensis, glucose, hematocrit, hemoglobin, lactate. Crescimento e estresse de dourados criados em tanques-rede em diferentes densidades de estocagemResumo -O objetivo deste trabalho foi avaliar o crescimento e os níveis de estresse de juvenis de dourado (Salminus brasiliensis) cultivados em tanques-rede. Peixes estocados nas densidades de 15 (D15) e 30 (D30) peixes por metro quadrado foram avaliados em delineamento inteiramente casualizado, com três repetições. Os peixes foram alimentados duas vezes ao dia com ração extrusada (42% de proteína bruta). A densidade influenciou apenas a biomassa e a ingestão diária, e as concentrações de glicose e lactato aumentaram ao longo do tempo. D15 e D30 não influenciaram o crescimento do dourado. No entanto, o aumento dos níveis de glicose e de lactato ao longo do tempo indica que o cultivo em tanques-rede é uma condição estressante para esta espécie.

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“…Studies have demonstrated that the farming system using cage nets is associated with a series of changes in the native fauna, including (i) changes in diet of native fish (Demétrio et al . ; Ramos et al . ), (ii) changes in zooplankton composition (Zanatta et al .…”

Section: Discussionmentioning

confidence: 99%

“…; Simberloff ; Britton & Gozlan ); (ii) cage nets attract the native fauna, leading to changes in their diet patterns (Demétrio et al . ; Ramos et al . ), which ultimately disturbs the structure and dynamics of natural food webs and facilitates the exchange of parasites between farmed and native fauna (Orsi & Agostinho ; Johnson et al .…”

Section: Introductionmentioning

confidence: 99%

Expansion of aquaculture parks and the increasing risk of non‐native species invasions in Brazil

Lima

Oliveira

Giacomini

et al. 2016

Reviews in Aquaculture

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Aquaculture is the main vector for introduction of non‐native species in Brazil and around the world. Despite the potentially serious and irreversible ecological impacts caused by non‐native species, they continue to be in many cases the preferred option in aquaculture farms, of which the recent plans of aquaculture expansion promoted by the Brazilian Government are an emblematic example. In this study, we present a survey of publicly available information on aquaculture parks to be installed across the Brazilian territory, with emphasis on species status as native or non‐native, and discuss the implications for the conservation of aquatic biodiversity. One hundred and thirty‐nine aquaculture parks (APs), with a total of 1556 sites covering 941.38 hectares, have been called for bids. Among these, 122 APs will contain at least one non‐native species, and 68 APs will be based exclusively on their cultivation. A predictable consequence is the enhancement of propagule pressure in surrounding aquatic ecosystems, increasing the risk of non‐native species establishment or persistence, which will likely intensify the environmental impacts already in course in four major river basins and along the Brazilian coast. These impacts will add up to more direct effects of aquaculture farming – for example elevated input of nutrients and organic matter – and include changes in habitat and water quality, spread of diseases, biotic homogenization, loss of population viability resulting from hybridization and outbreeding depression, and the local extirpation of native species.

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Influence of net cage farming on the diet of associated wild fish in a Neotropical reservoir

Cited by 36 publications

References 22 publications

Interference of cage fish farm on diet, condition factor and numeric abundance on wild fish in a Neotropical reservoir

Interference of cage fish farm on diet, condition factor and numeric abundance on wild fish in a Neotropical reservoir

Growth and stress of dourado cultivated in cages at different stocking densities

Expansion of aquaculture parks and the increasing risk of non‐native species invasions in Brazil

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