1 Water quality requirement and holding conditions of Arctic charr (Salvelinus alpinus L.) under intensive fish farming conditions.
Arctic charr (Salvelinus alpinus L.) have the most northern distribution of all freshwater fish and may be the most cold-adapted species within the salmonid family (Johnson, 1980). Due to its northern distribution Arctic charr experience considerable seasonal environmental changes throughout the yea...
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.663.9570 http://www.northcharr.eu/pdf/holding_conditions.pdf |
| Summary: | Arctic charr (Salvelinus alpinus L.) have the most northern distribution of all freshwater fish and may be the most cold-adapted species within the salmonid family (Johnson, 1980). Due to its northern distribution Arctic charr experience considerable seasonal environmental changes throughout the year, but are well adapted to utilize the associated rapid seasonal changes in resource availability (Johnson, 1980). Arctic charr has a high degree of biological plasticity and life history patterns can vary considerably also within groups of siblings. Growth of Arctic charr populations are known to be highly variable under natural conditions (Johnson, 1980; Hammer, 1984; Klemetsen et al., 2003), typically varying with seasonal changes in availability of food and environmental conditions. Temperature How temperature affects fish depends to a large degree on what temperature the fish is adapted to. In its most extreme ranges, lethargic temperatures, it is independent of adaptation temperature, but for levels within the survival range, the tolerance temperatures are often referred to as the temperature tolerance polygon (e.g. Jobling, 1994; figure 1). The polygone is a model of understanding temperature tolerance and how tolerance is related to acclimation temperature;the |
|---|