An overall estimation of losses caused by diseases in the Brazilian fish farms

Abstract

Parasitic and infectious diseases are common in finfish, but are difficult to accurately estimate the economic impacts on the production in a country with large dimensions like Brazil. The aim of this study was to estimate the costs caused by economic losses of finfish due to mortality by diseases in Brazil. A model for estimating the costs related to parasitic and bacterial diseases in farmed fish and an estimative of these economic impacts are presented. We used official data of production and mortality of finfish for rough estimation of economic losses. The losses herein presented are related to direct and indirect economic costs for freshwater farmed fish, which were estimated in US$ 84 million per year. Finally, it was possible to establish by the first time an estimative of overall losses in finfish production in Brazil using data available from production. Therefore, this current estimative must help researchers and policy makers to approximate the economic costs of diseases for fish farming industry, as well as for developing of public policies on the control measures of diseases and priority research lines.

Albendazole, levamisole and ivermectin are effective against monogeneans of Colossoma macropomum (Pisces: Serrasalmidae)

“…The production of farmed fish in 2016 was of 54.1 million tons (FAO, ). However, all types of fish production are threatened by diseases caused by parasites such as monogeneans, resulting in significant economic losses (Tavares‐Dias & Martins, ). Monogeneans are parasites with a direct and short life cycle, whose vertical transmission facilitates infection levels in intensive fish farming (Morales‐Serna et al, ).…”

Effects of a nanoemulsion with Copaifera officinalis oleoresin against monogenean parasites of Colossoma macropomum: A Neotropical Serrasalmidae

“…Although aquaculture is an activity of great importance in Brazil, this industry has been affected by economic losses caused by monogeneans in fish farming (Tavares- Dias & Martins, 2017). As the main products used for treatment and control of these parasites are chemotherapeutic substances that are highly toxic to fish (Boijink et al, 2015;Soares et al, 2016), there is a need for less toxic and novel bioactive compounds (Hashimoto et al, 2016;Soares et al, 2016;Zhang et al, 2014).…”

“…However, its fish stocks are under high fishery pressure, and it has become extinct in some localities in Amazon (Araújo‐Lima & Goulding, ; Benetton & Malta, ; Godoi, Engracia, Lizama, & Takemoto, ; Gomes et al., ). Intensive fish farming of tambaqui presents a critical problem of high levels of infections by ectoparasites such as the monogeneans Anacanthorus spathulatus , Notozothecium janauachensis and Mymarothecium boegeri , which can cause economic loss to aquaculture (Tavares‐Dias & Martins, ).…”

“…janauachensis and Mymarothecium boegeri, which can cause economic loss to aquaculture (Tavares- Dias & Martins, 2017).…”

Parasites in farmed Piaractus brachypomus (Serrasalmidae) in the state of Acre, western Brazilian Amazonia

“…In intensive fish culture, parasitic infections can be limiting factors for production and productivity, resulting in economic losses and/or expenses with antiparasitic treatments (Silva et al 2013;Dias et al 2015;Tavares-Dias and Martins 2017). Parasitic infections are favored by poor water quality and inadequate farming management and can compromise the defense mechanism of the fish, which in turn can lead to epizooties; in addition, the high stocking densities used in intensive fish farming can potentiate the effect of parasitism (Morais et al 2009;Santos et al 2013;Silva et al 2013;Franceschini et al 2013;Dias et al 2015).…”