scholarly journals KOMPOSISI DAN DISTRIBUSI SPASIAL LARVA IKAN EKONOMIS PENTING DI PERAIRAN ESTUARI BANJIR KANAL TIMUR KOTA SEMARANG

2016 ◽  
Vol 5 (3) ◽  
pp. 91-97
Author(s):  
Daryumi Daryumi ◽  
Sahala Hutabarat ◽  
Abdul Ghofar
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Fish Larvae ◽  
Current Speed ◽  
Nursery Ground ◽  
Composition Distribution ◽  
Dominance Index ◽  
Physical Chemical ◽  
Distribution Of Fish ◽  
Index Of Diversity

ABSTRAK Perairan estuari Banjir Kanal Timur berfungsi sebagai daerah asuhan bagi larva ikan. Daerah estuari bersifat fluktuatif sehingga sifat-sifat fisik, kimia dan biologi bervariasi, pada fase larva ikan sangat menentukan kelangsungan hidup dari spesies ikan maupun populasi. Oleh karena itu, mengetahui keberadaan larva ikan ekonomis penting dapat memberi informasi tentang daerah mana yang dapat digunakan sebagai daerah penangkapan dan daerah mana yang harus dilestarikan. Penelitian dilakukan pada bulan Maret-April 2016 di Muara Banjir Kanal Timur Kota Semarang  yang bertujuan untuk mengetahui komposisi dan distribusi spasial larva ikan. Metode yang digunakan yaitu metode Purposive Random Sampling. Hasil penelitian menunjukan jumlah rata-rata larva ikan sebanyak 1851 ind/150m3 terdiri dari famili Apogonidae, Mugilidae, Gerreidae, Lutjanidae, Engraulidae, Nemipteridae, Ambassidae, Gobiidae dan Chanidae. Jenis larva ikan yang yang paling banyak ditemukan adalah Mugillidae (Belanak) 38,92%, sedangkan yang paling sedikit adalah Chanidae (Bandeng) 0,38%.  Larva ikan paling banyak tertangkap di daerah pantai (Titik III) dan yang paling sedikit tertangkap didaerah muara menuju sungai (Titik VI). Perhitungan indeks morista menunjukan larva ikan menyebar secara acak. Struktur komunitas larva ikan yaitu indeks keanekaragaman (H’) berkisar 0,64-1,66, indeks keseragaman (E) berkisar 0,14-0,39, dan indeks dominasi berkisar 0,21-0,67. Berdasarkan hasil uji regresi menunjukkan antara salinitas dengan kelimpahan larva ikan berkorelasi positif, sedangkan kecepatan arus dengan kelimpahan larva ikan berkorelasi negatif. Kata Kunci: Estuari; Larva Ikan; Komposisi; Distribusi; Banjir Kanal Timur Semarang.  ABSTRACT The estuaries of eastern Banjir Kanal served as the nursery ground for fish larvae. Areas of estuaries were fluctuating. So the parameters of the physical, chemical and biological were variation, in fish larvae phas  largely determine  survival rate of fish species or populations. For it to, knowing the existence of economically important fish larvae could providing information about which areas be using as a capture area and which areas that should be preserved. Research conducted in March-April 2016 at the Eastern Banjir Kanal of Semarang, aims to find out the composition and spatial distribution of fish larvae. The method used Purposive Random Sampling method. The research showed the range number of larvae as 1851 ind/150m3 consists of Familia Apogonidae, Mugilidae, Gerreidae, Lutjanidae, Engraulidae, Gobiidae, Ambassidae, Nemipteridae and Chanidae. Types of fish larvae found the most high was Mugillidae (Mullet) 38,92%, while the least was Chanidae (Milkfish) 0,38%. The larvae of most fish caught in coastal areas (point III) and the least caught in the estuary towards the river (Point VI). The calculation of the index morista fish larvae spread randomly. Fish larvae community structures were the index of diversity (H ') range from 0,64-1,66, uniformity index (E) range 0,14-0,39, and dominance index range from 0,21-0,67. Based on the results of the regression analysis showed between salinity with an abundance of fish larvae correlating positively, where the current speed with an abundance of fish larvae  correlating negatively.Keywords: Estuarie;  Fish Larvae; Composition; Distribution; Eastern Banjir Kanal Semarang.

scholarly journals Keragaman Mikroalga di Lahan Bekas Tambang Batubara, Cempaka

BIOSCIENTIAE ◽  
2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Gunawan Gunawan
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Index Of Diversity

Have been by research the diversity of microalgae, at quarry Banjarbaru, with Purposive Random Sampling method in three stations, that there quarry 1, quarry 2 and quarry 3. The result showed that 32 genera fitoplankton which category into 5 classes include: Chlorophyceae, Chrysophyceae, Rhocophyceae, Xanthophyceae, Bacillariophyceae. The highest index of diversity was quarry 2 and lowest index diversity was quarry 3. Correlations analysis test indicate that pH were signivicant to the diversity of fitoplankton.

scholarly journals Abundance and Diversity of Diatom Class Bacillariophyceae as Bioindictaor of Pollution in the Waters of Tanjung Luar Fish Landing Based

2021 ◽  
Vol 20 (3) ◽  
pp. 525
Author(s):  
Niswatul Audah ◽  
Lalu Japa ◽  
M. Yamin
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Similarity Index ◽  
Pollution Level ◽  
Dominance Index ◽  
Systematic Random Sampling ◽  
Species Similarity ◽  
Sample Points ◽  
Abundance And Diversity

Tanjung Luar is coastal water used as a waste disposal area for Fish Landing Based (FLB) activities. However, the condition of the waters with phytoplankton as a bioindicator has never been reporting. This research aims to know Bacillariophyceae in terms of abundance, diversity, and measurement of environmental pollution variables. Methods Sampling at the study location was determined by a systematic random sampling method. Data analysis Bacillariophyceae were determined using formula abundance, diversity index, and dominance index. The index of similarity of species between sample points was determined based on the Bray-Curtis Cluster Analysis. Furthermore, the results showed an abundance of Bacillaryophyceae of 322,000 individuals / L classified as low, the diversity index of Bacillariophyceae of 2.162 classified as moderate, and a dominance index of 0.138 (without dominating species). The results showed that the highest species similarity index was between sample points II and III (57.9%), and the lowest species similarity index between sample points I and II was 23.7%. Water pollution on the waters of PPI Tanjung Luar is classified as moderate pollution level and oligotrophic fertility.

scholarly journals DIVERSITY OF WATER ENVIRONMENT GASTROPODA IN A EMPAYANG-KASAP RIVER IN THE DISTRICT LAHAT

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Desven Hecca ◽  
Saleh Hidayat ◽  
Susi Dewiyeti
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
River Water ◽  
Random Sampling ◽  
Sampling Method ◽  
Water Environment ◽  
Lower State ◽  
Line Transect ◽  
Pomacea Canaliculata ◽  
Dominance Index

This research has been conducted with the tittle the diversity of gastropods on the river water environment Empayang Lahat regency of South Sumatra province. The aim of this research species diversity of gastropods contained the region. This research was implemented conducted in October 2015, a river Empayang Kasap Sukajadi Lahat regency. The methods of this research is purposive random sampling method with 5 sampling stations, each station is divided into three substations (edges first, middle, edge 2) was determined by linear transects (line transect). The data of the sample was taken in the morning and afternoon. The results of this research were obtained 8 species of gastropods (Melanoides granifera, Elimia acuta, Brotia tetidinaria, Lymnae stagnalist, Lymnae rubiginosa, Pomacea canaliculata, Pila polita and Menetus sp) with 7 genus, and of the six tribes (families) of 4 order. The total index of the diversity in the river Empayang Kasap Sukajadi Lahat district was of 2.09 to 2.46. The highest levels of diversity found in the station V (2.46) and the lowest at station I (2.09). While the value of dominance index (C) with a range of 0.17 to 0.26 at five stations in the lower state, the highest level of dominance index at station I (0.26) and the lowest at station III (0.17). River water quality conditions greatly affect the existence of gastropods.

scholarly journals Kelimpahan Dan Keanekaragaman Jenis Ikan di Perairan Ndalir Kabupaten Merauke, Papua

2021 ◽  
Vol 1 (2) ◽  
pp. 33-42
Author(s):  
Dandi Saleky ◽  
Efraim Weremba ◽  
Marius A. Welikken
Keyword(s):  
Relative Abundance ◽  
Fish Species ◽  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Research Data ◽  
Dominance Index ◽  
Sampling Points ◽  
Index Value

This study aims to analyze the diversity of fish species caught on the Ndalir Coast of Merauke Regency. This research was conducted in Juli-August 2020. The determination of the sampling points at the research location used the purposive random sampling method with two observation stations. Analysis of the research data using relative abundance (Kr), Shannon-Wienner index (H '), uniformity index (E), and dominance index (C), The number of fish catches during the study time was 431 which were divided into 12 species of fish. Station two has a greater number of catches than station one. The highest relative abundance was tongue fish (Cynoglossus abbreviation) (Station I) and mullet (Mugil cephalus) (Station II). The diversity index value at the two observation stations is in the medium category. The uniformity and dominance index values ​​show that the species at the two research stations are evenly distributed with no dominating species.

scholarly journals Plankton Biodiversity in The Burai River of Ogan Ilir District, Sumatera Selatan

Biota ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 14-21
Author(s):  
Awalul Fatiqin
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Diversity Index ◽  
Dominance Index ◽  
Abundance Index ◽  
High Category ◽  
Wiener Diversity Index ◽  
Main Material

The purpose of this study was to determine the abundance of plankton in the Ogan Ilir regency of South Sumatra. Samples were obtained using a purposive random sampling method with plankton as the main material for measuring abundance and the Shannon Wiener Diversity Index (H), Simpson Dominance Index (C), and plankton abundance index. The results of the study obtained six classes consisting of 15 genera of plankton including Fragielaria, Synedra, Eunotia, Diatom, Fustulia, Oedogonium, Gonium, Chaetophora, Microspora, Allona, Neuplius, Lyngbya, Spirulina, Cyclotella and Dismidium. Diversity value at point 1 (1.75) with medium category, point 2 (3.5) with high category, point 3 (0.75) with the medium category. The diversity value of three points is known to be low in population.

scholarly journals Komposisi Diatom (Bacillariophyceae) Perifitik pada Substrat Kaca di Sungai Kapuas Kecil Kota Pontianak Kalimantan Barat

2018 ◽  
Vol 7 (3) ◽  
Author(s):  
Rizki Aprilliani Rafdinal Tri Rima Setyawati
Keyword(s):  
Environmental Conditions ◽  
Glass Substrate ◽  
Random Sampling ◽  
Sampling Method ◽  
Physical Chemical ◽  
Glass Slides ◽  
Periphytic Diatoms ◽  
Sampling Intervals ◽  
Periphytic Diatom ◽  
Chemical Water

Periphytic diatom (Bacillariophyceae) is diatom that lives attach on a substrate and it was dependent on the environmental conditions in an aquatic ecosystem. This study was aimed to determine the composition of periphytic diatom (Bacillariphyceae) on glass substrate and the condition of physical chemical water in Kapuas Kecil River. This study was conducted from September to December 2017. The sampling stations were chosen by purposive random sampling method and divided into four stations. At each station in the river were installed 5 baskets each with 5 glass slides. Samples were collected from three baskets with sampling intervals on day 2, 5, 10, 15, and 20. The result shows that the composition of periphytic diatoms (Bacillariophyceae) in Kapuas Kecil River consists of 29 genera from 2 orders (Pennales and Centrales) and 12 families. The most commonly genera found of periphytic diatom were Eunotia, Gomphonema, Frustulia and Nitzschia.

scholarly journals HUBUNGAN KERAPATAN LAMUN DENGAN KELIMPAHAN LARVA IKAN DI PULAU PRAMUKA, KEPULAUAN SERIBU JAKARTA

2016 ◽  
Vol 5 (3) ◽  
pp. 111-118
Author(s):  
Saraswati Saraswati ◽  
Agus Hartoko ◽  
Sasanti Retno Suharti
Keyword(s):  
Sampling Method ◽  
Fish Larvae ◽  
Survey Method ◽  
Nursery Ground ◽  
Aquatic Biota ◽  
Ecological Functions ◽  
Purposive Sampling ◽  
Close Relationship ◽  
Seagrass Ecosystems ◽  
Seagrass Density

ABSTRAKStadia larva merupakan fase awal daur kehidupan bagi ikan. Larva adalah biota perairan yang bersifat planktonik dan termasuk kedalam jenis meroplankton. Ekosistem Padang Lamun di Pulau Pramuka memiliki fungsi ekologis yang cukup penting di wilayah pesisir, dimana ekosistem ini merupakan salah satu daerah asuhan dan daerah mencari makan bagi larva ikan. Adanya perbedaan tingkat kerapatan lamun dan keberadaan makanan dapat memberikan pengaruh terhadap kelimpahan larva ikan. Sehingga hal tersebut menjadi landasan dilakukannya penelitian mengenai Hubungan Kerapatan Lamun Terhadap Kelimpahan Larva Ikan di Pulau Pramuka, Kepulauan Seribu Jakarta. Penelitian ini bertujuan untuk mengetahui kelimpahan larva ikan pada kerapatan lamun yang berbeda dan mengetahui pengaruh kerapatan lamun terhadap kelimpahan larva ikan. Metode yang digunakan adalah metode survei dengan penentuan titik sampling menggunakan metode purposive sampling. Hasil yang diperoleh adalah pada stasiun I tingkat kerapatan lamun padat (34156 individu/100m2) nilai kelimpahan larva ikan sebesar 756 individu/200m2 terdiri dari 8 famili. Stasiun II kerapatan sedang (26410 individu/100m2) nilai kelimpahan larva ikan yaitu 579 individu/200m2 terdiri dari 6 famili, dan stasiun III ketapatan jarang (6321 individu/100m2) nilai kelimpahan larva ikan sebesar 426 individu/200m2 yang terdiri dari 4 famili. Nilai korelasi antara kelimpahan larva ikan dengan kerapatan lamun yaitu sebesar r = 0,772. Berdasarkan hal tersebut dapat disimpulkan bahwa terdapat hubungan yang erat antara kelimpahan dan komposisi famili larva ikan dengan kerapatan lamun. Semakin tinggi nilai kerapatan lamun maka semakin tinggi pula nilai kelimpahan dan komposisi famili larva ikan. Begitu pula semakin rendah nilai kerapatan lamun maka nilai kelimpahan dan komposisi larva ikan juga semakin rendah. Kata Kunci : Kerapatan Lamun; Larva Ikan; Kelimpahan; Pulau Pramuka ABSTRACTLarval stage is the early phase of the life cycle for the fish. The larvae are aquatic biota that are planktonic and included into the type meroplankton. Seagrass ecosystems in Pramuka Island, has important ecological functions in coastal areas, where the ecosystem is one of the nursery ground and feeding ground for fish larvae. The big difference the density of seagrass and the presence of food can influence abundance of fish larvae. Thus, it will be the base for doing this research on The relations between Seagrass Density and Fish Larvae Abundance in Pramuka, Seribu Island Jakarta. This research aims to determine the abundance of fish larvae in different seagrass densities and determine the influence of the seagrass density on the abundance of fish larvae. The method used is survey method in determining the point of sampling using purposive sampling method. The results obtained are at station I the densities in dense seagrass (34156 individuals/100m2) abundance of fish larvae value at 756 individuals/200m2 consisting of eight families. Station II medium density (26410 individuals/100m2) the value of the abundance of fish larvae is 579 individuals/200m2 consisting of 6 families, and station III precision rarely (6321 individuals/100m2) the value of fish larvae abundance at 426 individuals/200m2 consisting of 4 families. The correlation values between the abundance of fish larvae with the density of seagrass in the amount of r = 0,772. Based on the above, we can conclude that there is a close relationship between the abundance and composition of fish larvae families with seagrass density. The higher the density of seagrass, the higher the families abundance and composition of fish larvae. Similarly, the lower the density value then the value of seagrass abundance and composition of fish larvae are also lower. Keywords: Sea Grass Density; Fish Larvae; Abundance; Pramuka Island.

scholarly journals Food Habit of Seluang Batu (Paracrossochilus vittatus Boulenger 1894) in Mentuka River Sekadau Districts West Kalimantan Province

2020 ◽  
Vol 21 (1) ◽  
pp. 11
Author(s):  
Diah Pratiwi ◽  
Tri Rima Setyawati ◽  
Ari Hepi Yanti
Keyword(s):  
Food Analysis ◽  
Random Sampling ◽  
Sampling Method ◽  
Niche Breadth ◽  
Stream Water ◽  
Food Habit ◽  
Current Speed ◽  
Natural Food ◽  
West Kalimantan ◽  
Endemic Fish

Seluang batu (Paracrossochilus vittatus) is one of the Borneo endemic fish from Cyprinidae Family that live in high stream water. The aim of this study was to know the food habit and niche breadth of seluang batu in Mentuka River. This study was conducted 3 months from November 2016 to January 2017. The sampling method used in this research was purposive random sampling. Seluang batu was taken from three stations in the Mentuka River using trap nets. The fish was measured in length and weight, then dissected to find out the type of food in the stomach. Food analysis was determined using index of preponderance and the niche breadth using Smith’s index. The results showed that seluang batu in Mentuka River including herbivore because they eat microalgae, namely Synedra was main food. Nice breadth of seluang batu for peryphiton was 0.71 meanwhile plankton was 0.20. Most of peryphiton and plankton in Mentuka River are Bacillariophyceae. The Mentuka River environtment supported the life of seluang batu and their natural food, namely the temperature about 26-28 ̊C, current speed was about 1-2,6 m/s, pH was about 6,8-7,3, dissolved oxygen was about 6,1-7 mg/L and free CO2 was 3,9-5,0 mg/L. Keywords: food habit, Paracrossochilus vittatus, periphyton, plankton.

Faktor-Faktor Yang Mempengaruhi Keputusan Mahasiswa Memilih Program Studi Kebidanan STIKES Muhammadiyah Ciamis Tahun 2016

2018 ◽  
Vol 5 (1) ◽  
pp. 69-82
Author(s):  
Evi Mariana
Keyword(s):  
Data Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Random Sampling ◽  
Sampling Method ◽  
Marketing Mix ◽  
Stratified Random Sampling ◽  
Price Promotion ◽  
F Test ◽  
Physical Evidence

The purpose of this study was to analyze the factors that influence the decisionof the students chose to study in Obstetrics Prodi STIKES Muhammadiyah Ciamis and analyze the factors that most influence the decision of the students chose to study in Obstetrics Prodi STIKES Muhammadiyah Ciamis. Collecting data in this study was conducted using a survey by questionnaire to 114 students by stratified random sampling method. Methods of data analysis using multiple linear regression, F test and test T. The result is a marketing mix that significantly is the product, place, and physical evidence. And that does not affect the marketing mix is price, promotion, place, and processes

BANKACILIKTA MÜŞTERİ İLİŞKİLERİ YÖNETİMİNİN MÜŞTERİ SADAKATİNE ETKİSİ

2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Fikret GÜMÜŞBUĞA
Keyword(s):  
Customer Loyalty ◽  
Random Sampling ◽  
Management System ◽  
Care Management ◽  
Sampling Method ◽  
Simple Random Sampling ◽  
Face To Face ◽  
Descriptive Research ◽  
Customer Care ◽  
Research Type

This study mainly focuses on customer care management and customer loyalty. Even though there are many experiential studies about customer care management and customer loyalty system, the lack of studies on customers in Karabük and Safranbolu locally, has leaded to focus on this study. Thus, this study mainly focuses on the influence of customer care treatments of banks in Karabük and Safranbolu on customer loyalty. Descriptive research type was used in the study. In this study simple random sampling method was used which is one of the probability sampling method, face to face surwey to all 726 participants was used for the study. As the result of the experiential study, the attendance and influence of customer care management and loyalty systems have been comparatively low, but it has been figured out that customer care management system influences customer loyalty level.

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