Vertebral Column Deformity and Hypoxia in Salmo salar

Sánchez, Rodrigo Castro; Obregón, Eduardo Bustos; Rauco, Mariana Rojas

doi:10.4067/s0717-95022011000400036

Cited by 6 publications

(1 citation statement)

References 25 publications

(28 reference statements)

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“…Spinal deformities in both wild and farmed fish have a range of etiologies, including bacterial 16 and parasitic 26 agents, physical trauma, 18 developmental issues, such as the absence of a swim bladder, 8 genetic conditions, 3 or nutritional factors such as deficiencies of vitamin C, vitamin D, 10 or phosphorus, 14 or excess of vitamin A. 20 Water quality parameters can also influence the development of spinal deformities and include factors such as high temperatures, 39 low dissolved oxygen content, 35 and the presence of toxins, such as organophosphates 7 and/or heavy metals. 29 Spinal deformities can become a significant production issue in aquaculture, often resulting in increased morbidity and reductions in growth rate with the potential for severe economic losses.…”

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confidence: 99%

Scoliosis and kyphosis in blue-spotted and marbled flathead fish associated with a Myxobolus acanthogobii–like parasite

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Spiers

et al. 2024

J VET Diagn Invest

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Spinal deformities in finfish have the potential to impact aquaculture industries and wild populations by increasing morbidity, mortality, and reducing growth rates. Myxobolus acanthogobii has been implicated in causing scoliosis and lordosis in various aquatic species in Japan. We investigated 4 cases of spinal deformity in 2 flathead ( Platycephalus) species that were submitted to the Elizabeth Macarthur Agricultural Institute (EMAI) in New South Wales (NSW), Australia, between 2015 and 2021. Flathead are commercially significant species that are popular among Australian consumers, and are also sought-after species targeted by recreational fishers. Gross deformities are concerning to the community and may impact the quality and quantity of specimens available for consumption. Three blue-spotted flathead ( P. caeruleopunctatus) and one marbled flathead ( P. marmoratus) were submitted, all with marked scoliosis and kyphosis; 1–2-mm cysts were present on the dorsum of the brain, most often over the optic lobe or cerebellum. Cytology and differential interference microscopy of cyst material revealed numerous oval spores, x̄ 14 ± SD 0.75 µm × x̄ 11.5 ± SD 0.70 µm, with 2 pyriform polar capsules, the morphology of which is consistent with a Myxobolus sp. PCR assay and 18S rDNA sequencing of the cyst material identified a Myxobolus sp. with 96% identity to M. acanthogobii. The identification of this Myxobolus sp. confirms the presence of parasites with the potential to cause spinal deformity in significant aquatic species in NSW waterways.

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confidence: 99%

Scoliosis and kyphosis in blue-spotted and marbled flathead fish associated with a Myxobolus acanthogobii–like parasite

Ngo,

Go,

Spiers

et al. 2024

J VET Diagn Invest

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Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Vanderplancke

Claireaux

Quazuguel

et al. 2014

Fish Physiol Biochem

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Since European sea bass (Dicentrarchus labrax) larvae occurred in coastal and estuarine waters at early life stages, they are likely to be exposed to reduced dissolved oxygen waters at a sensitive developmental stage. However, the effects of hypoxia at larval stage, which depend in part on fish species, remain very poorly documented in European sea bass. In the present study, the impacts of an experimental exposure to a chronic moderate hypoxia (40 % air saturation) between 30 and 38 days post-hatching on the physiological and developmental traits of European sea bass larvae were assessed. This study was based on the investigation of survival and growth rates, parameters related to energy metabolism [Citrate Synthase (CS) and Cytochrome-c Oxidase (COX) activities], and biological indicators of the maturation of digestive function [pancreatic (trypsin, amylase) and intestinal (Alkaline Phosphatase "AP" and Aminopeptidase-N "N-LAP") enzymes activities]. While condition of hypoxia exposure did not induce any significant mortality event, lower growth rate as well as CS/COX activity ratio was observed in the Hypoxia Treatment group. In parallel, intestinal enzyme activities were also lower under hypoxia. Altogether, the present data suggest that sea bass larvae cope with moderate hypoxia by (1) reducing processes that are costly in energy and (2) regulating mitochondria functions in order to respond to energy-demand conditions. Both these effects are associated with a delay in the maturation of the digestive function.

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Severe Scoliosis and Fin Deformities in Three Fish Species Collected from Jubail Vicinity, Saudi Arabia, Arabian Gulf

Jawad¹,

Ibrahim²,

Farrag

2019

Thalassas

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Vertebral Column Deformity and Hypoxia in Salmo salar

Cited by 6 publications

References 25 publications

Scoliosis and kyphosis in blue-spotted and marbled flathead fish associated with a Myxobolus acanthogobii–like parasite

Scoliosis and kyphosis in blue-spotted and marbled flathead fish associated with a Myxobolus acanthogobii–like parasite

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae

Severe Scoliosis and Fin Deformities in Three Fish Species Collected from Jubail Vicinity, Saudi Arabia, Arabian Gulf

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