Monday, March 23, 2009

Fish, The Journey of Salmon Fish

The Journey of Salmon Fish

Salmon fish, one of the many fish species that contain a good nutrient for human body. Salmon fish can alive at bargain and sea waters and one of the fishery product commodity that many consumption by the people. This is a little story about salmon fish cycle of life.

The Journey of salmon fish start at waters bargains (river) and here the egg of salmon fish will be hatch (usually on November), and here also alive struggle salmon fish begin. Level of the death salmon fish in this stage is very big. From the total of egg, more less half success to be hatch.

Salmon fish just hatch called "alevin", live between gravel stack at base the river and consume plankton. Alevin will be move out from the gravel river base (on May/June) when the provision of food is exhausted. In this stage, salmon fish called "fry". Fry will be grow and round into smolt, then move to river estuary aims to ocean.

The first year lived at ocean is a critical stage for salmon fish with the predator. Pinnipeds is a most predator for a salmon fish, they eat so many salmon fish in the ocean. Beside that, sea lion, bear, bird and human also be a threat for salmon fish continuance life.

Long life at the ocean (4-7 year), salmon fish grow and big enough to reproduction. Here is the unique, salmon fish do they reproduction process at the first place they life begin (river). Salmon fish life in groups, one group
of salmon fish will meet with another group on they trip return to the river.

Salmon fish return trip to the river loosing so much time (in month count), passing reef, swim to oppose the stream flow, jump and climb the waterfall (jump power of salmon fish achieve 3 meters), etc. One more thing, salmon fish ever eat anything during the trip. Existing body fat in salmon fist will be a food source until they arrive to the river. This body fat reservist used will causes physical change in salmon fish. In this stage is many fishes salmon that die, they die because wound, exhaustion and predator. Finally only several salmon fish safe and arrive to the river hilt.

At the river hilt, salmon fish in tired condition will dig soil at the base river and make a hole (25-30cm) for nest using they tails (hind fin). There is about 3.000-8.000 of salmon fish egg will be take in this hole. After that, a couple of salmon fish will close the hole and live around the hole until they die because out of energy. A part of salmon fish dead body be eaten by animal at the base river, and another part will decay by the bacteria. This process will make a natural fertilizer at the base river. Natural fertilizer be eaten by plankton and little insect at the base river. In the end, plankton and little insect will be a main food for salmon fish that hatch one month to go.

That's a little story about the journey of salmon fish.

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