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THE STUDY INVESTIGATION THE RELATIONSHIP BETWEEN FISH MORPHOLOGY AND STREAM HABITAT.
BIOLOGY 2108.
05/28/2014
Introduction There are different species that has difference shape and size, hence the word morphology, which means body form. There are some fishes like Grouper, which has elongated and slim body, whereas another fish like Batfish, which is round and short. The difference in size can affect how Fish are somewhat torpedo shaped. Having a shape like this makes it easier to glide through the water. This is called a fusiform body shape. The body is compressed at the sides and tapers more at the tail than at the head, Different shapes allow some fish to be fast or slow, bottom dwellers or live in the pelagic zone, and others to survive the extremes of the ocean ( R.j dunlap). Knowing the morphology of the fishes, he show expect a slim fish like the riffle to move more in the water, than a chubby fishes like the pool. To test this prediction, the T-test was conducted to measure the fishes from the habitat. The null hypothesis for the t-test is that there will be very little or no difference in average length to depth ratio between two habitats. The hypothesis is that the mean depth to length ratio of fish collected from pools will be significantly greater than the mean depth to length ratio of fish from riffles.
Materials and Method A large sample of fish was collected from different habitat, one which is the riffle, and the other which is the pool fish. Each group of student picked out 8 fishes each and measured it with a ruler. For the length, it was measured from mouth to where the tail stared, and for the depth, the measurement was done from fin to fin without pulling the fins as not to get a wrong measurement. Once the raw data was collected, the ratio of depth and length was calculated to get the proportional difference in the fishes rather than getting their height. Soon as
BIOLOGY 2108.
05/28/2014
Introduction There are different species that has difference shape and size, hence the word morphology, which means body form. There are some fishes like Grouper, which has elongated and slim body, whereas another fish like Batfish, which is round and short. The difference in size can affect how Fish are somewhat torpedo shaped. Having a shape like this makes it easier to glide through the water. This is called a fusiform body shape. The body is compressed at the sides and tapers more at the tail than at the head, Different shapes allow some fish to be fast or slow, bottom dwellers or live in the pelagic zone, and others to survive the extremes of the ocean ( R.j dunlap). Knowing the morphology of the fishes, he show expect a slim fish like the riffle to move more in the water, than a chubby fishes like the pool. To test this prediction, the T-test was conducted to measure the fishes from the habitat. The null hypothesis for the t-test is that there will be very little or no difference in average length to depth ratio between two habitats. The hypothesis is that the mean depth to length ratio of fish collected from pools will be significantly greater than the mean depth to length ratio of fish from riffles.
Materials and Method A large sample of fish was collected from different habitat, one which is the riffle, and the other which is the pool fish. Each group of student picked out 8 fishes each and measured it with a ruler. For the length, it was measured from mouth to where the tail stared, and for the depth, the measurement was done from fin to fin without pulling the fins as not to get a wrong measurement. Once the raw data was collected, the ratio of depth and length was calculated to get the proportional difference in the fishes rather than getting their height. Soon as