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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Ilmiah Sains
Andi Septiana, Andi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Immunology & microbiology Mathematics Physics Veterinary

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SPATIAL PATTERN IN BETA DIVERSITY OF ECHINOIDEA AND ASTEROIDEA COMMUNITIES FROM THE COASTAL AREA OF TOMIA ISLAND, WAKATOBI MARINE NATIONAL PARK, SOUTHEAST SULAWESI, INDONESIA Analuddin, Kangkuso; Nasaruddin, Nasaruddin; Septiana, Andi; Sarliyana, Wa Ode; Nurlyati, Agus; Masa, Wa; Rahim, Saban
BIOTROPIA Vol. 22 No. 1 (2015): BIOTROPIA Vol. 22 No. 1 June 2015
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2015.22.1.355

Abstract

The present study was aimed to elucidate the spatial pattern in the beta diversity of marine bentic for Echinoidea and Asteroidea that assemblages the coastal area of Tomia Island, Wakatobi Marine National Park, Indonesia. The two transect lines of 460 and 260 m in length with small quadrats of 1m2 wide were placed at the open and unopen beaches perpendicularly to the coastlines. The important value index and similarity index SI of organisms on these taxa were estimated in each the transect. Echinometra mathaei was the most dominant Echinoidea at open and unpen beaches, while Protoreaster nodusus was the most dominant Asteroidea at both areas. Most of SI values of Echinoidea at open beach were estimated less than 50%, which was lower than SI values that of organisms at unopen beach. On the other hand, most of SI values of Asteroidea at both areas were estimated more than 70% representing high similarity degree of its species composition among sites. The disimilarity index of organisms in the taxa of Echinoidea and Asteroidae was increased significantly as increasing the distance of among stands, which suggested that pettern in beta diversity of these taxa was associated with the spatial heterogenity.
Toxicity of Copper (Cu) on Abnormalities and Mortality of Tilapia Fish (Oreochromis niloticus L.) Prolarvae Harlis, Wa Ode; Saputri, Desti Yulia; Malik, Nurhayu; Septiana, Andi; Resman, Resman
Jurnal Ilmiah Sains Volume 26 Issue 2, October 2026
Publisher : Sam Ratulangi University, Manado, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jis.v26i2.67205

Abstract

Contamination of the heavy metal Copper (Cu) in waters can inhibit fish growth by reducing the level of gonad maturity and closing the gill membranes. changes in activity, morphological abnormalities of the prolarvae and even death. This study aims to assess the toxicity of Copper (Cu) to tilapia fish prolarvae (Oreochromis niloticus L.). This research is a type of experimental research structured based on a Completely Randomized Design (CRD) pattern.  A total of 240 three-day-old tilapia prolarvae were divided into four treatment containers, namely Control, P1(2.0 mg/L), P2(2.5 mg/L), P3(3.0 mg/L), and each treatment consisted of three replications. Six hours after administration of copper, mortality parameters were observed, while prolarval abnormalities were observed after 48 hours.  Data were analyzed using one way ANOVA (Analysis of Varience) α=0.05. The results of the study showed that the average percentage of mortality for controls was (0%), P1(6.67%), P2(23.33%), P3(36.67%) while the forms of abnormalities found were kyphosis, lordosis, scoliosis and tail sticking. The research results show that copper (Cu) has a toxic effect because it increases the percentage of mortality and causes abnormalities in tilapia prolarvae (Oreochromis niloticus L.). Keywords: Copper (Cu); Oreochromis niloticus; prolarvae; toxicity
Co-Authors Agus Nurlyati, Agus Harlis, Wa Ode Kangkuso Analuddin, Kangkuso Nasaruddin Nasaruddin NURHAYU MALIK, NURHAYU Resman, Resman Saban Rahim Saputri, Desti Yulia Wa Masa, Wa Wa Ode Sarliyana, Wa Ode