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First Report of Linguadactyloides Brinkmanni (monogenoidea: Linguadactyloidinae) on Hybrids of Colossoma Macropomum X Piaractus Brachypomus (characidae) from South America
| Content Provider | Semantic Scholar |
|---|---|
| Copyright Year | 2013 |
| Abstract | Dias, M. K. R., Tavares-DIAS, M. & Marchiori, N. (2012) First report of Linguadactyloides brinkmanni (Monogenoidea: Linguadactyloidinae) on hybrids of Colossoma macropomum x Piaractus brachypomus (Characidae) from South America. Braz. J. Aquat. Sci. Technol. 16(2):61-64. eISSN 1983-9057. This study presents the first report of infection by Linguadactyloides brinkmanni Thatcher & Krytsky, 1983 (Monogenoidea, Dactylogyridae, Linguadactyloidinae) on the gills of hybrid tambatinga (Colossoma macropomum x Piaractus brachypomus) from fish farms from the city of Macapá, state of Amapá, Brazil. Out of 201 hybrid tambatinga examined, ten were infected by L. brinkmanni (prevalence= 4.9%). From these hosts, 21 specimens of L. brinkmanni were collected and the mean intensity of infection was 2.1 (1-4 parasites/ host). This study expands the distribution of this monogenoidean for a new host. Key-words: Dactylogyridae, Freshwater fish, Infection, Parasite Dias et al.: Monogenoidea of hybrid tambatinga 62 This monogenoidean species is highly pathogenic to its host since its penetration in the gill filaments (possibly reaching the cartilage of the gill filament) causes severe inflammatory reaction and serious gill hyperplasia accompanied by hemorrhage on the sites of attachment (Thatcher & Krytsky, 1983; Aragort et al., 2002; Thatcher, 2006). Thatcher (2006) reported that L. brinkmanni ingests epithelium cells as well as red blood cells; hence, in general, it can be observed in red color when examined to microscopy. In fact, in the present study, the presence of red hemoglobin pigment was observed inside L. brinkmanni, corroborating with the findings of the aforementioned author. This also suggests that a high level of infection by monogenoidean species can lead to severe fish anemia, which may represent a danger to farmed fish. It can also cause a general stress response with potentially harmful effects to these fish. Analysis of parasitological indexes showed L. brinkmanni prevalence of 4.9% and mean intensity of infection of 2.2 parasites/host (Table 1). Besides L. brinkmanni, it was also registered the presence of Anacanthorus spathulatus Kritsky, Thatcher & Kayton, 1979, which dominated the monogenoideans community on the hosts’ gills (prevalence=79.1% and mean intensity=126 parasite/host). Centeno et al. (2004) also found A. spathulatus infesting the hybrid tambatinga cultured in Venezuela (prevalence of 72.6%), but no presence of L. brinkmanni. For C. macropomum farmed in cages, Morais et al. (2009) reported A. spathulatus (prevalence = 100% and mean intensity = 57.3), Mymarothecium boegeri Cohen & Kohn, 2005 (prevalence = 71.4% and mean intensity = 3.4), Notozothecium janauachensis Belmont-Jegu, Domingues & Laterça, 2004 (prevalence = 85.7% and mean intensity = 5.8), and L. brinkmanni (prevalence = 14.3% and mean intensity = 1.1), respectively. However, gill-infecting dactylogyrid monogenoideans commonly exhibit a narrow site-specificity. Due the competition among the species by a same niche on A B |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://siaiap32.univali.br//seer/index.php/bjast/article/download/3300/2467 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Report |
