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All Journal HAYATI Journal of Biosciences AGRIVITA, Journal of Agricultural Science
Dede Setiadi
Department of Biology, Bogor Agricultural University, Bogor
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Habitat Preferences and Distribution of the Freshwater Shrimps of the Genus Caridina (Crustacea: Decapoda: Atyidae) in Lake Lindu, Sulawesi, Indonesia Annawaty Annawaty; Daisy Wowor; Achmad Farajallah; Dede Setiadi; Bambang Suryobroto
HAYATI Journal of Biosciences Vol. 23 No. 2 (2016): April 2016
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1233.575 KB) | DOI: 10.4308/hjb.23.2.45

Abstract

The objectives of this study were to reveal ecological preferences and distribution of all species of Caridina found in Lake Lindu and their catchment area. Specimens from 39 sampling sites were caught using tray net and hand net. There are three species of Caridina found in the lake system, i.e. Caridina linduensis, Caridina kaili and Caridina dali. There is no overlapping distribution among the species. Caridina kaili is a true riverine species and it is never encountered sympatric with C. dali nor C. linduensis. This species is abundant in streams and ditches with moderate flow running water and gravel–cobble substrate. It is mainly spread within streams west to the lake. Both C. daliand C. linduensis can be found in the lake and streams with very slow current to almost stagnant water, muddy sand substrate and associated with roots of water plants and leaf litter. However, C. dali is never occurred together with C. linduensis and they are less abundant compare to C. kaili. Distribution of Caridina spp. in Lake Lindu is probably affected by the temperature of their habitats and the occurrence of introduced fish such as Mozambique tilapia (Oreochromis mossambicus), common carp (Cyprinus carpio), and an alien riceland prawn (Macrobrachium lanchesteri). These introduced and alien species can have the potency to become predators or competitors for the Caridina spp. It is also the first record for M. lanchesteri present in Lake Lindu.
ENVIRONMENTAL FACTORS AFFECTING PRODUCTIVITY OF TWO INDONESIAN VARIETIES OF BLACK PEPPER (Piper nigrum L.) Yudiyanto Yudiyanto; Akhmad Rizali; Abdul Munif; Dede Setiadi; Ibnul Qayim
AGRIVITA, Journal of Agricultural Science Vol 36, No 3 (2014)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v36i3.456

Abstract

Black pepper plantation area in Lampung province (the biggest producer area within Indonesia) has decreased from time to time, which might be related to unfavourable environmental condition. The aim of this study was to assess which environmental factors are positively or negatively correlated with productivity in particular yield of two local varieties of black pepper plant (Natar 1 and Natar 2) in Lampung province.  Two observational studies were carried out in the present study i.e. phenological development and productivity of black pepper productivity in related to various environmental factors. Our results showed that productivity of two varieties were significantly affected rainfall, light intensity and micro humidity. Dry matter yield was positively correlated with rainfall, both in Natar 1 and Natar 2. It was concluded that among environmental factors affecting productivity of black pepper, rainfall intensity was the most influencing factor with a positive relationship with the productivity.Keywords: Black pepper, climate, cultivar, environment, Indonesia
Co-Authors Abdul Munif ACHMAD FARAJALLAH Akhmad Rizali Annawaty Annawaty, Annawaty Bambang Suryobroto Daisy Wowor IBNUL QAYIM Yudiyanto Yudiyanto