Subtle temperature increase can interact with individual size and social context in shaping phenotypic traits of a coldwater fish
| Autor: | Khaled Horri, Camille A. Leblanc, Skúli Skúlason, D. Benhaim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Trout Physiology ved/biology.organism_classification_rank.species Social Sciences Marine and Aquatic Sciences Water Columns Oceanography 01 natural sciences Medicine and Health Sciences Body Size Psychology Foraging Multidisciplinary Behavior Animal Animal Behavior biology Eukaryota Juvenile fish Cold Temperature Freshwater Fish Phenotypes Coldwater fish Phenotype Physiological Parameters Fish development Vertebrates Medicine Research Article Fish Biology Science Zoology Context (language use) 010603 evolutionary biology Fish physiology Fish Physiology Genetics Animals Animal Physiology 14. Life underwater Salvelinus Behavior ved/biology 010604 marine biology & hydrobiology Organisms Biology and Life Sciences Feeding Behavior biology.organism_classification Vertebrate Physiology Fish Earth Sciences Evolutionary ecology Genetic Fitness |
| Zdroj: | Plos One (1932-6203) (Public Library Science), 2019-03, Vol. 14, N. 3, P. e021306 (21p.) PLoS ONE, Vol 14, Iss 3, p e0213061 (2019) PLoS ONE |
| Popis: | Temperature and individual egg size have been long studied in the development of fishes because of their direct effects on individual fitness. Here we studied the combined effects of three important factors for fish development, i.e. egg size, social environment and water temperature. Arctic charr (Salvelinus alpinus), a coldwater fish known to be phenotypically plastic, was used to investigate how these factors may affect growth and foraging behaviour of juvenile fish in a benign environment. We accounted for the social environment during early development by comparing fish raised in groups and in isolation. We examined the effect of egg size and a 2 degrees C difference on foraging behaviour, activity and growth a few weeks after first feeding. Growth trajectories of fish originating from large and small eggs were similar within each temperature: larger fish coming large eggs were at all time larger than smaller fish. There was no indication that small fish raised at a higher temperature grew faster than larger fish raised at a lower temperature. A 2 degrees C difference in temperature affected the behaviour of fish differently according to body size and/or social context. The foraging probability difference between fish raised in groups and fish briefly isolated was higher at 4.5 degrees C than at 6.5 degrees C for both size fish. Finally, there was no repeatability in foraging behaviour and mobility for isolated individuals. These results highlight the importance of small changes in temperature when evaluating growth and behaviour of fishes, and reveal the importance of considering the interaction of temperature with other factors, e.g. individual size and social environment, especially at early stages of development in fishes. We discuss these findings in the context of rapid changes in temperature and how temperature and its interaction with other factors may affect the phenotypes, ecology and evolution of coldwater fishes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|