The importance of using fish as a bio-indicator during bio-monitoring is often undervalued. The study of fish community structures highlight long term impacts associated with a particular reach or bio-monitoring point. Fish communities are mainly impacted by two aspects: habitat availability and stress which is a response associated with a particular stimulus.
Fish stresses can be divided into three main responses:
Primary: neuroendocrine responses – which causes particular species to migrate as soon as they are exposed to a new stressor this may be chemical or when threatened by a new predator (Alien invasive fish species);
Secondary: Metabolic responses – which may have an effect on the nutrient cycling of fish species; and
Tertiary: Dessication – where the stressor or impact is too large resulting in fish kills.
At Envass we realise the importance of using a multi-disciplinary approach in our bio-monitoring projects. Please contact us at email@example.com for a free quotation.
Alien Gambusia affinis (Mosquito fish)
Electroshocking capture method
Staightfin Barb (Enteromius paludinosus)