Skeletal deformities in wild and farmed cleaner fish species used in Atlantic salmon Salmo salar aquaculture
| Autor: | Per Gunnar Fjelldal, Lars Helge Stien, Malthe Hvas, Thomas Wk Fraser, Angelico Madaro, Frode Oppedal |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
musculoskeletal diseases Cyclopterus lumpus Salmo salar Zoology Aquaculture Aquatic Science Cleaner fish Labrus bergylta 010603 evolutionary biology 01 natural sciences Fish Diseases medicine Animals Salmo Ecology Evolution Behavior and Systematics Bone Diseases Developmental biology business.industry 010604 marine biology & hydrobiology biology.organism_classification musculoskeletal system Perciformes Vertebra medicine.anatomical_structure Wrasse business Vertebral column |
| Zdroj: | Journal of Fish Biology |
| Popis: | As a first attempt to assess bone health in cleaner fish production, wild and cultured ballan wrasse Labrus bergylta and lumpfish Cyclopterus lumpus were examined by radiology. In C. lumpus, wild fish (57%) had more vertebra deformities (≥1 deformed vertebrae) than cultured fish (2-16%). One wild C. lumpus had lordosis and another was missing the tail fin. In L. bergylta, wild fish (11%) had fewer vertebra deformities than cultured individuals (78-91%). Among the cultured L. bergylta, 17-53% of the fish had severe vertebra deformities (≥6 deformed vertebrae) with two predominate sites of location, one between vertebra 4 and 10 (S1) in the trunk, and one between 19 and 26 (S2) in the tail. Fusions dominated S1, while compressions dominated S2. Although wild L. bergylta had a low vertebra deformity level, 83% had calluses and 14% had fractures in haemal/neural spines and/or ribs. The site-specific appearance and pathology of fracture and callus in wild L. bergylta suggests these are induced by chronic mechanical stress, and a possible pathogenesis for fish hyperostosis is presented based on this notion. In conclusion, good bone health was documented in cultured C. lumpus, but cultured L. bergylta suffered poor bone health. How this affects survival, growth, swimming abilities and welfare in cultured wrasse should be further investigated. SIGNIFICANCE STATEMENT: Skeletal deformities were studied in ballan wrasse and lumpfish of both wild and cultured origin for the first time to identify potential welfare issues when deploying them as cleaner fish in salmon sea cages. While cultured lumpfish showed good bone health, cultured wrasse had a high occurrence of vertebra deformities, which is expected to impact lice eating efficiency and animal welfare negatively. These deformities are most likely induced early in development. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|