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Size-relative Effectiveness of Clove Oil as an Anaesthetic for Rainbow Trout (Oncorhynchus mykiss Walbaum, 1792) and Goldfish (Carassius auratus Linnaeus, 1758)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Perdikaris, Costas Nathanailides, Cosmas Gouva, Evangelia Gabriel, Ugwemorubong Ujagwung Bitchava, Konstantina Athanasopoulou, Fotini Paschou, Ageliki Paschos, Ioannis |
| Copyright Year | 2010 |
| Abstract | The purpose of this work was to investigate the size-relative effectiveness of clove oil as an anaesthetic for rainbow trout and goldfish. In total, 128 rainbow trout (Oncorhynchus mykiss) (two groups of 20-23 and 30-33 cm mean fork length) and 160 goldfish (Carassius auratus) (four size groups of 1.5-2.5, 5-7, 11-15 and 20-25 cm) were anaesthetized at different clove oil concentrations of 50, 100, 150 mg·l -1 for trouts and 75, 100, 150 mg·l -1 for goldfish. Rainbow trout exhibited total loss of balance and no response to external stimuli with shorter induction time as dosage increased (120.5 s, 64.4 s and 44.3 s, respectively). Goldfish exhibited total loss of balance and no response to external stimuli after induction time that varied with dosage used and body size of fish. The small fish (1.5-7 cm) exhibited shorter induction time which ranged from 84.28 s at 75 mg·l-1 clove oil to 41.14 s at 150 mg·l-1 clove oil. The larger fish had a longer induction time inversely related to the dosage. Recovery time was longer than induction time in both species. Both species recovered within 6 min after anaesthesia at 150 mg·l-1 clove oil. Clove oil did not produce marked changes (P 0.05). For both fish species, clove oil was effective, producing minimum stress and zero mortalities, and can be recommended as an effective anaesthetic. Syzygium aromaticum, fish anaesthesia, animal welfare Rapid expansion of the aquaculture industry that occurred in previous decades prompted scientific debates on the potential suffering of fish being handled during common aquaculture procedures or during slaughtering. Research aimed at lessening the suffering of cultured fish is vital to meet the concern for farmed fish welfare (Ashley 2007). Handling stress and various manipulations in aquaculture can have a negative impact on fish health and their growth (Hoskonen and Pirhonen 2006). Anaesthetics are therefore applied to reduce these negative effects to the minimum. The dosage required to induce general anaesthesia varies according to the anaesthetic used and other factors such as water temperature, hardness, salinity, oxygen concentration, length of exposure, body weight, the ratio of gill area/body surface area and the species of fish. In general, small fish are more sensitive to anaesthesia than larger fish (Ross and Ross 1999). An ideal anaesthetic for fish should induce anaesthesia in less than 3 to 5 min, with total loss of balance and muscle tone, allowing an uneventful and rapid (i.e. less than 10 min) recovery with low tissue residues after recovery, thus being safe to users and consumers. The anaesthetic should be inexpensive and easy to use (Gilderhus and Marking 1987; |
| Starting Page | 481 |
| Ending Page | 490 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Volume Number | 79 |
| Alternate Webpage(s) | https://actavet.vfu.cz/media/pdf/avb_2010079030481.pdf |
| Alternate Webpage(s) | https://doi.org/10.2754/avb201079030481 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
