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Lateral Migration of Fish in the Blackwater Flood Runoff Ecosystem of the Sebangau River, Central Kalimantan | Abstract
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Lateral Migration of Fish in the Blackwater Flood Runoff Ecosystem of the Sebangau River, Central Kalimantan

Abstract

Lukas


Several types of fish with increasing of the body size and are followed by the changes of food types that cause these fish to change habitats. Fish habitat in the black water runoff ecosystem of the Sebangau River is divided into three habitus, namely habitus of herb and grass, shrub, bush and liana, and trees which existence are influenced by the water depth. There are nine fish communities identified, these fish migrate in those three habitus, that are migration due to growth and food. Some certain species such as kapar, sepat fish, tambakan fish and catfish, in the larval stage and developing into adult fish are in tree, herb and grass habitus, with a water depth of 1.3-1.7 meters, while for fish with a big enough size. such as tapah fish and snakehead fish species (Chana Sp) are scattered on shrub, bush and liana habitus with an average water depth of 1.6 - 4.1 meters. The analysis result of the food types from the stomach of fish that have been caught in the Sebangau river, based on the food composition, it is dominated by 72-99% of fry and 52-72% of plants or grains, classified as all-eating (omnivorous) and meat-eating fish (carnivores) and included in predatory fish type. The changes of food types in each fish life stage and the availability of natural food in the waters are one of the factors that affect the growth and structure of fish communities in the black water flood runoff ecosystem of the Sebangau River.

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