Fight of flight
Normal behaviour when in 'fight or flight' situation for both Carp and Trout.
Normally when both of these fish species come within view of their natural predator, they have a fight of flight response. Where as these 2 species are not heavily predated by other fish, they do have mammalian and avian predators, such as Mink, and Cormorants. Usually, when these species come into contact with their predator, they will swim away and try to hide, this is usually discovered through experience. For example, another fish in their shoal being predated and killed. Usually when a fish is predated on, by another species of fish, or even a mammalian or avian predator, they will release chemicals into the water, which then tell fish in the area, that there is a predator around. If a small and in experienced shoal of fish come into contact with a fish and are unsure whether it be friend or foe, one fish is usually sent out closer to the other fish, to see if friend of foe, and whilst this occurs chemical signals are being transmitted throughout the water which then indicated to the fish whether it be safe, or whether the fish is a predator.
Abnormal behaviour when in 'fight or flight' situation for both Carp and Trout.
Abnormal behaviour around predators, would be things such as; approaching a known predator with no care or caution, which would be very unusual. Another would be once another fish had been predated on, and once the chemical signals had been released to the other fish, for them fish then to sit still and almost freeze, not moving away or making any attempt to escape the predator in the area. This would also be abnormal as for the fish not to move or take notice, would mean that they are not taking notice of the chemical signals transmitted. This further could be a problem with the fish's lateral line, as that is how they can detect the chemical signals transmitted.
Finally for a Carp or Trout to exhibit normal behaviour, such as resting, feeding or spawning when a predator approaches would be considered abnormal, however the fish involved may not have had experience with predators in the past especially if farmed in a controlled environment, then introduced into the lake or river system.
Both carp and trout would have the same abnormalities and normalities when in a fight of flight situation.
Normally when both of these fish species come within view of their natural predator, they have a fight of flight response. Where as these 2 species are not heavily predated by other fish, they do have mammalian and avian predators, such as Mink, and Cormorants. Usually, when these species come into contact with their predator, they will swim away and try to hide, this is usually discovered through experience. For example, another fish in their shoal being predated and killed. Usually when a fish is predated on, by another species of fish, or even a mammalian or avian predator, they will release chemicals into the water, which then tell fish in the area, that there is a predator around. If a small and in experienced shoal of fish come into contact with a fish and are unsure whether it be friend or foe, one fish is usually sent out closer to the other fish, to see if friend of foe, and whilst this occurs chemical signals are being transmitted throughout the water which then indicated to the fish whether it be safe, or whether the fish is a predator.
Abnormal behaviour when in 'fight or flight' situation for both Carp and Trout.
Abnormal behaviour around predators, would be things such as; approaching a known predator with no care or caution, which would be very unusual. Another would be once another fish had been predated on, and once the chemical signals had been released to the other fish, for them fish then to sit still and almost freeze, not moving away or making any attempt to escape the predator in the area. This would also be abnormal as for the fish not to move or take notice, would mean that they are not taking notice of the chemical signals transmitted. This further could be a problem with the fish's lateral line, as that is how they can detect the chemical signals transmitted.
Finally for a Carp or Trout to exhibit normal behaviour, such as resting, feeding or spawning when a predator approaches would be considered abnormal, however the fish involved may not have had experience with predators in the past especially if farmed in a controlled environment, then introduced into the lake or river system.
Both carp and trout would have the same abnormalities and normalities when in a fight of flight situation.