EKOLOGI DAN BIOLOGI IKAN LELAN (Diplocheilichthys pleurotaenia Bleeker) DI SUNGAI KAMPAR DAN WADUK PLTA KOTO PANJANG

Muhammad, Fauzi (2016) EKOLOGI DAN BIOLOGI IKAN LELAN (Diplocheilichthys pleurotaenia Bleeker) DI SUNGAI KAMPAR DAN WADUK PLTA KOTO PANJANG. Doctoral thesis, Universitas Andalas.

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Abstract

Diplocheilichthys pleurotaenia is a native fish of the Kampar River, Riau, Indonesia. This fish used to migrate for reproductive activity. The construction of the Koto Panjang Dam, may hamper the migration of the fish. To understand the environmental condition and the biological aspects of the fish from the upstream and downstream areas of the dam, a study has been conducted. The water and the fish were sampled monthly. Data obtained were analyzed descriptively. Results shown that in the downstream, the current was faster, the DO and the pH were lower and the types and abundance of plankton was higher than those of the upstream. The biological aspects of fish shown that there was no difference in feeding habit, but there was difference in morphological characteristics. The fish from the downstream has more compressed body, smaller tail base and bigger caudal fin. The number of fish captured in the downstream was 228, while that of the upstream was 7. The downstream fish was slimmer that that of the upstream and it shown negative allometric growth pattern, while that of the upstream was isometric. The otolith of the downstream fish also shown faster growth. However, the reproductive pattern of fish from both areas were similar, there were mature males and females in April and there was no fish captured in May. The rarity of fish in the upstream may not be caused by the environmental factors nor the reproductive biology, but it caused by the failure in recruitment. Keywords: Diplocheilichthys pleurotaenia, morphometric, feeding habit, fish reproduction, fish recruitment.

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