bluuebunny/crossref_metadata_2025 huggingface dataset:
Ekologi Fitoplankton : Ditinjau dari Aspek Komposisi, Kelimpahan, Distribusi, Struktur Komunitas dan Indeks Saprobitas Di Perairan Morosari, Demak
Authors: Putri Cinthya Ruhanto , Djunaedi Ali , Subagyo Subagyo
Published: July 2021

Perairan Morosari yang terletak di Kecamatan Sayung, Kabupaten Demak merupakan tempat terjadinya percampuran antara air darat dan air laut. Disekitar perairan Morosari terdapat pemukiman penduduk, industri wisata dan aktifitas nelayan. Aktivitas masyarakat dan wisatawan tersebut akan menimbulkan perubahan yang mengarah pada peningkatan pencemaran yang berimbas kepada keberadaan fitoplankton. Tujuan dari penelitian ini adalah untuk mengetahui komposisi, kelimpahan, distribusi, struktur komunitas dan indeks saprobitas fitoplankton di perairan Morosari. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif dan penentuan lokasi menggunakan metode purposive sampling. Penelitian ini terbagi atas 3 sub-area di 3 area yang berbeda. Pengambilan sampel zooplankton dengan cara aktif dengan menarik planktonet secara horizontal. Hasil penelitian diperoleh 24 genera fitoplankton dari 3 kelas di perairan Morosari. Kelimpahan fitoplankton bervariasi antara 12.556 – 19.108 individu/m3. Distribusi fitoplankton tidak merata dan cenderung mengikuti arah arus. Indeks keanekaragaman menunjukkan nilai 1,70–2,25 yang termasuk dalam kategori sedang. Indeks keseragaman fitoplankton menunjukkan nilai 0,71–0,81 yang termasuk dalam kategori Tinggi. Indeks dominansi di perairan Morosari berkisar antara 0,18–0,29 dan termasuk ke dalam kriteria tidak ada jenis yang mendominasi. Indeks Saprobik menunjukkan nilai 0,6–1,3 yang termasuk dalam kategori β–Mesosaprobik. Morosari waters located in District Sayung, Demak Regency is waters area there is a mixture of land and sea water. Surrounding the Morosari waters there are residential, tourist industry and fishing activities. These activities will be affected changes that lead to increased pollution that affects the presence of phytoplankton. The purpose of this research was to know the composition, abundance, distribution, community structure and saprobity index of phytoplankton in Morosari waters, Sayung Subdistrict, Demak District. This research used deskriptive eksplorative method and determination location used purposive sampling method. The results obtained 24 genera phytoplankton of 3 classes. The abundance of phytoplankton ranges from 12.556-19.108 individu/m3. The distribution of phytoplankton is uneven and tends to follow the current direction. The phytoplankton Diversity Index indicated the values of 1,70–2,25 which were in the medium category. The phytoplankton evenness index indicated a value of 0,71 to 0,81 belonged to the High category. The dominance index in Morosari waters indicated no particular genus dominating with the values of 0,18-0,29. The Saprobik Index indicated the values of 0,6–1,3 which were into the category β –Mesosaprobic.
Distribusi Horizontal Zooplankton Berdasarkan Salinitas Di Perairan Bonang Kabupaten Demak Indonesia
Authors: Yudhatama Bayu Khrisna , Redjeki Sri , Suryono Chrisna Adhi
Published: July 2021

ABSTRAK: Zooplankton merupakan salah satu biota yang sensitif akan perubahan karakteristik perairan. Zooplankton sering dijadikan indikator terhadap kondisi ekologis suatu perairan. Tujuan dalam penelitian ini yaitu untuk mengetahui Distribusi zooplankton dan pengaruh perbedaan salinitas pada distribusi zooplankton di Perairan Bonang Kabupaten Demak. Lokasi penelitian dibagi menjadi tiga stasiun yaitu Stasiun A (Sungai), Stasiun B (Muara), Stasiun C (Laut). Sampel diambil dengan plankton net di ketiga stasiun tersebut dengan tiga kali pengulangan dan tiga waktu pengulangan di setiap stasiunnya. Hasil penelitian ini ditemukan 20 genus zooplankton yaitu Corycaeus sp, Muggiaea sp, Mysis sp, Penaeus sp, Macrobrachium sp, Anisomysis sp, Pleuromamma sp, Thysanopoda sp, Euterpina sp, Undinula sp, Acartia sp, Arcella sp, Acrocalanus sp, Centropages sp, Candacia sp, Halopthilus sp, Paracalanus sp, Metridia sp, Pseudocalanus sp, Emplectonema sp yang termasuk ke dalam 6 Kelas, Keenam kelas tersebut terdiri dari Hydrozoa, Malascostraca, Maxillopoda, Tubulinea, dan Hexanaulipa.  Hasilnya nilai P yaitu 0,00008 < 0,5 yang berarti salinitas memberi dampak pada distribusi horizontal zooplankton berdasarkan Uji Anova. ABSTRACT: Zooplankton is one of the sensitive biota to respond environmental aquatic of changes. Zooplankton is frequently used as an indicator of the ecological conditions of waters. The purpose of this study is to determine the distribution of zooplankton and the effect of differences in salinity on zooplankton distribution in the coastal waters of Bonang Demak Regency. The research location is divided into three stations namely Station A (River), Station B (Estuary), Station C (Marine). Samples were taken with a plankton net at the three stations with three repetitions and three repetitions at each station. The results of this study found 20 genera zooplankton namely Corycaeus sp, Muggiaea sp, Mysis sp, Penaeus sp, Macrobrachium sp, Anisomysis sp, Pleuromamma sp, Thysanopoda sp, Euterpina sp, Undinula sp, Acartia sp, Arcella sp, Acrocalanus sp, Centropages sp, Candacia sp, Halopthilus sp, Paracalanus sp, Metridia sp, Pseudocalanus sp, Emplectonema sp included in 6 Classes, The six classes consist of Hydrozoa, Malascostraca, Maxillopoda, Tubulinea, and Hexanaulipa. The result is P value P = 0,00008 < 0,5 that meansthe zooplankton distribution is influenced by salinity based on the Anova Test
Aktivitas Antibakteri Ekstrak Metanol Rumput Laut Gracilaria verrucosa, Greville, 1830 (Florideophyceae : Gracilariaceae) di Balai Besar Perikanan Budidaya Air Payau Jepara
Authors: Widodo Radhian Wikanarto , Subagiyo Subagiyo , Pramesti Rini
Published: July 2021

Infeksi bakteri patogen menjadi masalah kesehatan dunia. Antibiotik untuk penanggulangan infeksi menjadikan bakteri resisten karena pemakaiannya tidak sesuai dosis. Permasalahan ini dapat diatasi salah satunya dengan pencarian sumber antibiotik baru termasuk diantaranya pada rumput laut. Penelitian ini bertujuan untuk menentukan aktivitas antibakteri ekstrak metanol G. verrucosa terhadap Escherichia coli, Bacillus cereus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Vibrio anguillarum, dan Vibrio alginolyticus. Penelitian dilakukan dengan metode eksperimental laboratoris. Sampel rumput laut hasil budidaya Balai Besar Perikanan Budidaya Air Payau (BBPBAP) Jepara dikeringkan kemudian dimaserasi dengan metanol selama 2x24 jam. Aktivitas antibakteri ekstrak diuji pada konsentrasi 100 µg/disk, 50 µg/disk, 25 µg/disk, dan 10 µg/disk kemudian dilakukan uji fitokimia. Hasil uji aktivitas antibakteri menunjukkan bahwa ekstrak metanol G. verrucosa tidak memiliki aktivitas antibakteri. Uji fitokimia menunjukkan ekstrak mengandung flavonoid, saponin, steroid, dan triterpenoid. Pathogenic bacterial infection become a world health problem. Antibiotics for prevention of infection make bacteria resistant due to the incorrect dosage. One of these problems can be overcome by finding a new source of antibiotics including seaweed. This study aims to determine the antibacterial activity of methanol extract of G. verrucosa against Escherichia coli, Bacillus cereus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Vibrio anguillarum, and Vibrio alginolyticus. Laboratory experimental method was used in this study. Seaweed samples from the cultivation at Brackish Water Aquaculture Center (BBPBAP) Jepara were dried and then macerated with methanol for 2x24 hours. The antibacterial activity of the extract was tested at concentration of 100 µg / disk, 50 µg / disk, 25 µg / disk, and 10 µg / disk then phytochemical tests were carried out. The results of antibacterial activity test showed that G. verrucosa methanol extract did not have antibacterial activity. The phytochemical test showed that seaweed extract contained flavonoids, saponins, steroids, and triterpenoids
Komposisi Perifiton Pada Daun Lamun Enhalus acoroides, Royle 1839 (Angiosperms : Hydrocharitaceae) dan Thalassia hemrpichii, Ascherson 1871 (Angiosperms : Hydrocharitaceae) di Perairan Teluk Awur, Jepara
Authors: Utama Abdino Putra , Soenardjo Nirwani , Endrawati Hadi
Published: July 2021

ABSTRAK: Perifiton merupakan salah satu organisme yang berkontribusi besar dalam meningkatkan produktivitas primer di ekosistem lamun. Kondisi padang lamun sangat menentukan keberadaan perifiton, sehingga pada kondisi lamun yang baik merupakan tempat yang layak untuk penempelan perifiton. Aktivitas antropogenik akan menyebabkan gangguan maupun kerusakan pada lamun sehingga mempengaruhi penempelan perifiton pada lamun. Perairan Teluk Awur dekat dengan kegiatan-kegiatan antropogenik yang dapat menyebabkan gangguan pada kondisi lingkungan sekitarnya. Penelitian ini bertujuan untuk mengetauhi jenis dan kelimpahan perifiton yang hidup pada lamun jenis Enhalus acoroides dan Thalassia  hemprichii, serta kelimpahan perifiton pada tiap bagian daun (pangkal, tengah dan ujung). Pengambilan sampel daun lamun dilaksanakan Bulan November 2018 di Perairan Teluk Awur, Kabupaten Jepara. Identifikasi jenis lamun dilakukan pada lokasi penelitian, dan identifikasi jenis perifiton dilakukan pada laboratorium. Berdasarkan hasil penelitian bahwa, komposisi perifiton terdapat 6 kelas terdiri dari 23 genus dengan kelimpahan tertinggi selalu terdapat pada ujung daun. Genus yang paling sering ditemukan adalah Nitzschia. Kelimpahan perifiton pada lamun jenis E. acoroides dan T. hemprichii secara berturut – turut sebanyak 2689,33 individu/cm2 dan 3158,67 individu/cm2. Kelimpahan perifiton semakin meningkat ketika mendekati bagian ujung daun. ABSTRACT: Periphyton is one of the organism that contributes greatly in increasing primary productivity on seagrass ecosystems. Seagrass conditions greatly determine the presence of periphyton, so when a good seagrass conditions, it is a suitable place for periphyton attachment. Anthropogenic activity will cause disturbance and damage to seagrass, which affects the attachment of periphyton on seagrass. Teluk Awur waters are close to anthropogenic activities which can cause interference with the conditions of the surrounding environment.This study aims to determine the type and abundance of periphyton that lives on the types of seagrass leaves Enhalus acoroides and Thalassia hemprichii, as well as periphyton abundance in each part of the leaf (base, middle and tip).Sampling of seagrass leaves was carried out on November 2018 in Teluk Awur, Jepara Regency. Identification of seagrass species was carried out at the study site, and identification of the type of periphyton was carried out in the laboratory. Based on the results of the study, that on periphyton composition, 6 classes are consisting of 23 genera with the highest abundance always found at the tip of the leaf. The most common found genus is Nitzschia. Periphyton abundance in seagrass species E. acoroides and T. hemprichii respectively were 2689.33 Ind/cm2 and 3158,67 Ind/cm2. Periphyton abundance inceases as it approaches the tip of the leaves.
Hasil Kandungan Agar Ekstraksi Non-Alkali Gracilaria sp. yang Tumbuh di Lingkungan Berbeda
Authors: Andiska Prismabella Wilis , Susanto AB , Pramesti Rini
Published: July 2021

ABSTRAK: Gracilaria sp. merupakan rumput laut merah penghasil agar yang banyak digunakan untuk industri pangan maupun non pangan lainnya. Ekstraksi ini umumnya menggunakan alkali yang berdampak pada lingkungan dan keamanan bahan pangan. Informasi tentang ekstraksi perlakuan non alkali di Indonesia untuk industri pangan diduga belum ada sehingga penelitian ini perlu dilakukan. Tujuan penelitian ini untuk mengkaji apakah ekstraksi non alkali dari Gracilaria sp. dapat menghasilkan agar, rendemen, kandungan proksimat serta dianalisis FTIR dari kedua lokasi yang berbeda (laut dan tambak). Metode ekstraksi dilakukan dengan merebus sampel kering hingga didapatkan agar, yang selanjutnya dikeringkan dan dijadikan tepung. Hasil penelitian menunjukkan ekstraksi perlakuan non alkali dari kedua lokasi dapat menghasilkan rendemen dengan nilai rendah (14-15,31%). Kadar air tertinggi (15,40±0,59%) terdapat pada agar sampel dari laut, kadar abu tertinggi (41,45±0,59%) pada sampel kering dari laut, kadar protein tertinggi (8,59±0,26%) pada sampel kering dari tambak, kadar lemak tertinggi (0,63±0,13%) pada agar sampel dari laut, dan karbohidrat tertinggi (67,19±0,86%) pada sampel kering dari tambak. Hasil FTIR menunjukkan agar mengandung komposisi gugus galaktosa 3,6-anhydro-L-galaktosa. ABSTRACT: Gracilaria sp. is a red seaweed which is known as an agarophyte and widely used for food and other non-food industries. Generally agar extraction uses alkali which has an environmentally impact and food safety. Non-alkaline extraction treatment for food grade is still under observed in Indonesia. The purpose of this research is to access whether agar extraction of Gracilaria sp. can be carried out, as well as the amount of agar yield, proximate contents and FTIR analysis from two different locations. The extraction method is done by boiling a dry sample to obtain agar, which is then dried and turned into flour. The results showed that the extraction of non-alkaline treatment could be carried out on Gracilaria sp. with low yield (14-15.31%). The highest water content (15.40±0.59%) found in agar from dried seaweed form the sea, highest ash (41.45±0.91%) in dried seaweed from the sea, highest protein (8.59±0.26%) in dried cultured seaweed, highest fat (0.63±0.13%) in agar from the sea, and highest carbohydrate (67.19±0.86%) in dried cultured seaweed. FTIR analysis showed that the agars contained a composition of galactose groups of 3,6-anhydro-L-galaktose.
Analisis Kualitas Alginat Rumput Laut (Padina sp.) Menggunakan Metode Ekstraksi Jalur Kalsium
Authors: Pasaribu Adam Sojuangon , Sedjati Sri , Pramesti Rini
Published: July 2021

ABSTRAK: Padina sp. merupakan spesies rumput laut cokelat (Phaeophyta) penghasil alginat, namun kualitas alginat yang dihasilkan tergolong rendah dibandingkan alginofit lainnya. Metode ekstraksi jalur kalsium diduga dapat meningkatkan kualitas alginat sehingga penelitian ini perlu dilakukan. Tujuan penelitian ini untuk mengkaji apakah ekstraksi jalur kalsium dapat meningkatkan mutu alginat yang dihasilkan dari rumput laut Padina. Ekstraksi dilakukan dengan metode jalur kalsium konvensional dan jalur kalsium MAE (Microvawe Assisted Extraction). Metode penelitian yang digunakan adalah eksperimental laboratoris dengan 1 perlakuan (kosentrasi CaCl2) dan 3 taraf konsentrasi yaitu 0,5 M 1,0 M dan 1,5 M. Parameter kualitas yang dianalisis meliputi rendemen, kadar air, Kadar abu, viskositas, pH dan FTIR. Hasil uji two way ANOVA menunjukan terdapat signifikansi rendemen dengan nilai 0,007. Metode jalur kalsium MAE dengan konsentrasi 1,0 M CaCl2 menghasilkan kualitas terbaik dengan nilai rendemen (26,83%), kadar air (10,67%), kadar abu (21,83%), viskositas (11,42 cPs)  dan pH (6,77). Hasil analisis FTIR menunjukan ke-2 metode ekstraksi menghasilkan natrium alginat dengan adanya sidik jari guluronat dan manuronat pada bilangan gelombang 930-890 cm-1 dan 870-820 cm-1. ABSTRACT: Padina sp. is a species of brown seaweed (Phaephyta) producing alginates, but the quality of alginates produced is relatively low compared to other alginophytes. The calcium pathway extraction method is thought to improve the quality of alginates thus the reason of the research. This research aims to examine whether the calcium pathway extraction improves the quality of alginates produced from Padina. Seaweed extraction was carried out using conventional calcium pathways and MAE (Microwave Assisted Extraction) calcium pathways. The research method used was laboratory experimental with 1 treatment (CaCl2 concentration) and 3 concentration levels : 0.5 M, 1.0 M, 1.5 M. Quality parameters analyzed includes yield, moisture content, ash contetnt, viscosity, pH and FTIR. The two way ANOVA test results showed that there was a significance of yield value of 0.007. The MAE calcium pathway method with a concentration of 1.0 M CaCl2 produces the best quality with a yield value (26.83%), water content (10.67%), ash content (21.83%), viscosity (11.42 cPs) and pH (6.77). FTIR analysis results show that the two extraction methods produces sodium alginate in the presence of guluronate and manuronic fingerprints at wave numbers 930-890 cm-1 and 870-820 cm-1.
Analisis Multivariat Untuk Melihat Hubungan Jenis Sedimen Terhadap Jenis Lamun
Authors: Chamidy Ardian Nurrasyid , Suryono Chrisna Adhi , Riniatsih Ita
Published: July 2021

ABSTRAK: Perairan Teluk Awur dan Pulau Panjang memiliki kondisi perairan yang berbeda dan merupakan perairan yang masih baik untuk pertumbuhan lamun. Ekosistem padang lamun tumbuh pada sedimen dan hidup terendam di dalam air laut. Komposisi jenis sedimen diduga dapat menyebabkan perbedaan komposisi jenis lamun yang didasari oleh pemikiran bahwa perbedaan komposisi ukuran butir sedimen akan menyebabkan perbedaan nutrisi bagi pertumbuhan lamun. Penelitian ini bertujuan untuk mengkaji hubungan jenis sedimen terhadap jenis lamun di perairan Teluk Awur dan Pulau Panjang Jepara dengan menggunakan analisis multivariat. Penelitian ini dilakukan dalam beberapa tahap yang meliputi tahap persiapan, tahap penentuan stasiun dengan metode sampling purposive method, tahap pengambilan data lapangan, tahap analisis tekstur sedimen yang dilakukan di laboratorium teknik sipil fakultas teknik Universitas Diponegoro, dan tahap analisis data menggunakan analasis multivariat yaitu Principal Component Analysis (PCA). Hasil analisis PCA  menunjukkan  bahwa  Cymodocea  serrulata  dan  Cymodocea  rotundata  berkorelasi positif dengan sand, kecepatan arus, dan pH. Thalassia hemprichii dan Enhalus acoroides memiliki korelasi positif dengan silt, clay, suhu, salinitas dan bahan organik. Gravel memiliki korelasi postif dengan nitrat dan fosfat.ABSTRACT: The waters of Teluk Awur and Panjang Island have different water conditions and are still good waters for seagrass growth. Seagrass ecosystems grow in sediments and live submerged in seawater. The composition of the substrate types is thought to cause differences in the composition of seagrass types based on the thought that differences in the composition of sediment grain size will cause differences in nutrition for seagrass growth. This study aims to examine the relationship of sediment types to seagrass species in Teluk Awur  and  Pulau  Panjang,  Jepara  by  using  multivariate  analysis.  This  research  was conducted  in  several  stages  including  the  preparation  stage,  the  stage  of  determining stations with the purposive sampling method, the stage of field data collection, the stage of sediment texture analysis carried out in the civil engineering laboratory of the engineering faculty Diponegoro University, and the stage of data analysis using multivariate analysis with Principal Component Analysis (PCA). PCA analysis results show that Cymodocea serrulata and Cymodocea rotundata are positively correlated with sand, current speed, and pH. Thalassia hemprichii and Enhalus acoroides have a positive correlation with silt, clay, temperature, salinity and organic matter. Gravel has a positive correlation with nitrate and phosphate.
Pengamatan Kesesuaian Lahan Peneluran Penyu Lekang Lepidochelys olivacea, Eschscholtz, 1829 (Reptilia:Cheloniidae) di Pantai Mapak Indah, Nusa Tenggara Barat
Authors: Akbar Mochamad Rizaldi , Luthfi Oktiyas Muzaky , Barmawi M.
Published: July 2021

ABSTRAK : Pantai Mapak Indah merupakan pantai yang sering menjadi pantai pendaratan biota Penyu, umumnya penyu yang mendarat berjenis penyu Lekang (Lepidochelys olivaceae), pantai yang juga di gunakan untuk aktifitas nelayan dan pariwisata diduga akan mengganggu habitat penyu yang cenderung merusak atau merubahnya. Tujuan dari penelitian ini adalah untuk mengetahui habitat yang sesuai untuk kebutuhan peneluran penyu Lekang (Lepidochelys olivaceae). Metode yang di pakai menggunakan data Primer (Suhu, Kelembaban, Kemiringan, dan Vegetasi) dan skunder berasal dari catatan kelompok pelestari penyu dan instansi terkait. Penelitian ini di laksanakan pada tanggal 24 Juni – 05 Agustus 2019. Hasil dari penelitan ini adalah rentang kemiringan pantai mencapai 10.5%-26% dengan rata-rata 16.3% masih dalam kategori Agak Curam, untuk perbandingan komposisi pasir di sarang Alami dan Semi-Alami 92,94% & 96,34%, vegetasi yang di temukan di sekitar pantai adalah cemara Udang (Casuarina Equisetifolia) dan Pandan Laut (Pandanus sp.), kelapa (Cocos Nucifera) dan Katang-katang (Ipomoea pes-caprae). Suhu saat di lakukan pengamatan selama seminggu memiliki rentang 25°-28° hal ini dapat mempengaruhi jenis kelamin Tukik yang akan menetas serta lama inkubasinya di dalam sarang Semi-Alami ABSTRACT: Mapak Indah Beach is a beach that is often used as a landing site for sea turtles, generally turtles that land on the type of Lekang turtle (Lepidochelys olivaceae), a beach that is also used for fishing and tourism activities is thought to disturb turtle habitats that tend to damage or change it. The purpose of this study was to determine the suitable habitat for the needs of Lekang turtle nesting (Lepidochelys olivaceae). The method used uses Primary data (Temperature, Humidity, Slope, and Vegetation) and secondary data derived from the records of turtle conservation groups and related agencies. This research was carried out on 24 June - 05 August 2019. The results of this research are the range of beach slopes reaching 10.5% -26% with an average of 16.3% still in the category of somewhat steep, for comparison of sand composition in natural and semi-natural nests 92.94% & 96.34%, vegetation found around the coast is pine shrimp (Casuarina Equisetifolia) and Pandan Laut (Pandanus sp.), Coconuts (Cocos Nucifera) and Katang-Katang (Ipomoea pes-caprae). Temperature when observed for a week has a range of 25 ° -28 ° this can affect the sex of the hatchlings that will hatch and the length of incubation in the Semi-Natural nest
Komposisi Larva Ikan pada Ekosistem Lamun di Perairan Jepara Jawa Tengah
Authors: Wiraputra Muhamad Ravian , Suryono Suryono , Endrawati Hadi
Published: July 2021

Larva merupakan fase pertumbuhan awal pada ikan, pada fase tersebut ikan-ikan membutuhkan tempat untuk berlindung dan mencari makanan. Ekosistem lamun sangat mendukung keberlangsungan hidup ikan, fungsi ekologis lamun sebagai daerah memijah, daerah asuhan serta tempat mencari makan bagi ikan. Tujuan penelitian ini untuk mengetahui kehadiran, serta mengetahui hubungan antara kelimpahan larva ikan dan lamun di Perairan Prawean dan Blebak, Kabupaten Jepara. Metode yang digunakan dalam penelitian ini adalah metode deskriptif dan penentuan lokasi sampling menggunakan purposive sampling methode. Penelitian ini dilakukan pada dua lokasi yang berbeda dengan masing-masing lokasi memiliki 2 stasiun, pada setiap stasiun memiliki 3 stasiun. Pengambilan sampel larva ikan dilakukan dengan menggunakan larva net (P = 0,9 m; L : 0,6 m) dengan ukuran mata jaring 800 µm. Sampel yang didapat kemudian disortir dan diidentifikasi menggunakan literatur. Hasil penelitian ini ditemukan Nemipteridae, Lutjanidae, Ambassidae, Sphyraenidae, Bothidae, Clupeidae, Chanidae, Monacanthidae. Famili larva ikan yang dominan adalah Nemipteridae. Nilai indeks keanekaragaman dari empat stasiun termasuk dalam kategori rendah-sedang (0,92 - 1,50). Nilai indeks keanekaragaman dari empat stasiun termasuk dalam kategori sedang-tinggi (0,61 - 1,00). Kisaran nilai indeks dominasi larva ikan dari empat stasiun menunjukan tidak adanya famili yang mendominasi (0,23 - 0,54). Larvae are an early growth phase in fish, in that phase fish need a place to take shelter and find food. Seagrass ecosystem strongly supports the survival of fish, the ecological functions of seagrass as a clusters area, an area of care and a place to eat for fish. The purpose of this research is to know the presence, and know the relationship between the abundance of fish larvae and seagrass in Prawean waters and Blebak, Jepara regency. The method used in this research is the descriptive method and determination of location sampling using purposive sampling Methode. The research was conducted on two different locations with each location having 2 stations, at each station having 3 substations. Sampling of fish larvae is done using the net larva (P = 0.9 m; L: 0, 6m) with mesh eye size 800 μm. The obtained samples were then sorted and identified using literature. The results of this study were found in the larvae of 8 families Nemipteridae, Lutjanidae, Ambassidae, Sphyraenidae, Bothidae, Clupeidae, Chanidae, Monacanthidae. The family of fish larvae most commonly found are Nemipteridae. The value of the diversity index of the four stations is included in the low-medium category (0.92 - 1.50). The value of the diversity index of four stations is included in the medium-high category (0.61 - 1.00). The value of the index of the dominance of the fish from the four stations indicates that there is no dominant family (0.23 - 0.54).
Abu Cangkang Kerang Anadara granosa, Linnaeus 1758 (Bivalvia: Arcidae) sebagai Adsorben Logam Berat dalam Air Laut
Authors: Sudarmawan Wisnu Satriyo , Suprijanto Jusup , Riniatsih Ita
Published: July 2021

Kerang Darah merupakan komoditi ekonomis yang tersebar di seluruh wilayah perairan Indonesia, salah satunya adalah Perairan Demak. Adanya permintaan yang tinggi pada daerah demak dari hasil survey DKP Kabupaten Demak pada tahun 2018 dapat menimbulkan terjadinya limbah cangkang yang cukup banyak. Melalui pendekatan teknologi yang tepat, limbah cangkang kerang tersebut dapat diolah menjadi abu cangkang. Berdasarkan komposisi senyawa kimia abu cangkang mengandung CaO cukup tinggi sehingga abu cangkang berpotensi untuk menjerap logam berat. Materi yang digunakan dalam penelitian adalah abu cangkang hasil olahan dari limbah cangkang sisa produksi kerang darah. Metode eksperimental laboratoris  dilakukandalam penelitian yaitu dengan mengontakkan secara langsung logam dan abu cangkang kerang dara (Anadara granosa) dengan pengaruh variasi jenis logam berat dengan analisis spektroskopi serapan atom (SSA). Penyerapan yang optimal terjadi pada logam berat Mangan (Mn) konsentrasi awal 0,103 mg/L menjadi <0,001 dan kontak waktu 24 jam daya serap sebesar 100%. Dapat disimpulkan bahwa pada abu cangkang cukup baik dalam penyerapan logam berat Besi (Fe), Mangan (Mn), Seng (Zn) di air laut perairan Morosari Demak karena dalam proses menghilangkan logam berat dengan struktur CaO disebut pertukaran ion dipengaruhi oleh beberapa faktor jenis adsorben yang digunakan, luas permukaan adsorben, dan konsentrasi zat yang di penjerapan. Blood cockle are economic commodities that are spread throughout the territorial waters of Indonesia, one of which is the Demak waters.  The high demand in the Demak area from the results of DKP survey in 2018 can causing a lot of cockle shell waste. Through the right technological approach, the waste is processed into blood cockle shell ash. Based on the chemical composition of shell ash containing CaO in the shell is high enough so the ash has potential to absorb heavy metals.  The material used is the blood cockle shell ash that processed from waste shell from the production of blood cockle. The experimental laboratory method was carried out in this research, by directly contacting metal and blood cockle shell ash (Anadara granosa) with the influence of variations in heavy metal types by atomic absorption spectroscopy (AAS) analysis. Optimal absorption occurs in the heavy metal Manganese (Mn) initial concentration of 0.103 mg / L to <0.001 and 24-hour contact time absorption of 100%.  It can be concluded that the shell of the product itself has not been efficient in carrying out all the absorption of heavy metals in the sea water samples of Morosari Demak waters because in the process of removing heavy metals with CaO structures is influenced by the type of adsorbent used, the surface area of the adsorbent, and the concentration of in absorption.
Reproductive Biology of Oci Fish Selaroides leptolepis in Tomini Bay
Authors: Pasisingi Nuralim , Ibrahim Putri Sapira , Moo Zulkifli Arsalam , Tuli Munirah
Published: July 2021

Local people name Selaroides leptolepis distributed in Tomini Bay as Oci Fish. A study of the fish reproductive biology, which is one aspect of fisheries biology, is crucial to support the implementation of sustainable Oci Fish resource management policies. This study aims to determine the average length at first maturity, gonad maturity stages, and fecundity of the fish in Tomini Bay. Sampling was carried out using a stratified random sampling method from the catches of the fishermen landed in Fish Landing Base Kampung Tenda, Gorontalo City. The time interval sampling was conducted per month during April, May, and June 2020. Fish and egg samples preserved using ice cubes and a 10% formaldehyde solution correspondingly. The results of the study showed that the Oci Fish in Tomini Bay had a length range of the first maturity between 166 and 174 mm with a gonad maturity index ranging from 1.773 to 2.760%. The average fish fecundity was 16623 ± 4850 eggs.
Karakteristik Morfometrik Lamun Enhalus acoroides dan Thalassia hemprichii di Pesisir Pulau Bintan
Authors: Sarinawaty Pratiwi , Idris Fadhliyah , Nugraha Aditya Hikmat
Published: July 2021

ABSTRAK: Lamun merupakan satu-satunya tumbuhan berbiji (angiospermae) yang mampu hidup terendam di dalam air laut dan beradaptasi pada lingkungan dengan salinitas tinggi serta memiliki rhizome, daun dan akar sejati. Kajian terkait karakteristik morfometrik menekankan pada keadaan karakter morfologi suatau spesies yang mendiami suatu wilayah tertentu. Penelitian ini dilakukan dengan tujuan untuk membandingkan karakteristik morfometrik lamun Enhalus acoroides dan Thalassia hemprichii pada ekosistem lamun di beberapa wilayah pesisir di Pulau Bintan. Penentuan lokasi penelitian ditentukan dengan metode purposive sampling sedangkan pengambilan data lamun menggunakan transek kuadran ukuran 50x50cm. Karakteristik bagian lamun yang diukur yaitu panjang daun, lebar daun, diameter rhizome, panjang akar dan jumlah daun. Karakteristik morfometrik lamun di ketiga lokasi memiliki perbedaan. Lamun E. acoroides di lokasi Pantai Impian memiliki panjang daun yang terpanjang dan diameter rhizome yang paling besar dari lokasi lainnya. Sedangkan lokasi pengudang memiliki lebar daun tertinggi. Morfometrik Lamun jenis T. hemprichii yang mempunyai nilai panjang daun, lebar daun dan diameter rhizome tertinggi terdapat di lokasi Pantai Impian. Sedangkan panjang daun terendah terdapat di Pengudang.  ABSTRACT: Seagrass is the only seed plant (angiosperms) that can live submerged in seawater and adapt to environments with high salinity and has rhizomes, leaves, and tree roots. Studies related to morphometric characteristics emphasize the morphological character of a species that inhabits a particular area. This research was conducted in October 2019 to March 2020 in Dompak, Pengudang Village, and Pantai Impian to compare the morphometric characteristics of the seagrass Enhalus acoroides and Thalassia hemprichii in seagrass ecosystems in some coastal areas of Bintan Island. The determination of the location of the study was determined by a purposive sampling method while seagrass data collection using a 50x50cm quadrant transect size. Morphometric characteristics of seagrasses in the three locations have differences. Seagrass E. acoroides at the Impian Beach location has the longest leaf length and the largest rhizome diameter than other locations. Whereas the storage location has the highest leaf width. Morphometrics of seagrass T. hemprichii which has the highest value of leaf length, leaf width, and rhizome diameter is at the Dream Beach location. While the lowest leaf length is found in Pengudang.
Hubungan antara Jenis Sedimen Pasir dan Kandungan Bahan Organik di Pantai Kartini, Jepara, Jawa Tengah
Authors: Yudha Gadisza Asmara , Suryono Chrisna Adhi , Santoso Adi
Published: July 2021

Pantai Kartini merupakan salah satu kawasan wisata di Kabupaten Jepara. Berbagai aktifitas masyarakat serta infrastruktur perairan menjadi kebutuhan yang sangat krusial dengan letak Pantai Kartini. Adanya aktivitas dan bangunan dapat menyebabkan perubahan sebaran ukuran butir dan kandungan bahan organik. Penelitian ini memiliki tujuan untuk mengetahui jenis dan klasifikasi sedimen serta jumlah kandungan bahan organik yang terdapat dalam sedimen di Pantai Kartini, Jepara. Pengambilan data pada penelitian ini yaitu pengambilan data primer yang berupa sampel sedimen dengan menggunakan sediment core. Dilanjutkan dengan analisis sampel sedimen dan analisis kandungan bahan organik. Hasil penelitian menunjukkan bahwa di perairan Pantai Kartini, Jepara memiliki jenis sedimen pasir (sand) dimana nilai ukuran butir tersebut berkisar dari 81-96%, yang mana pada Stasiun 1 rata-rata sebesar 91,6-96%, Stasiun 2 rata-rata sebesar 93,5-96,9%, dan Stasiun 3 rata-rata sebesar 81,4-92,9%. Sedangkan, Kandungan Bahan Organik yang terdapat di perairan tersebut memiliki konsentrasi berkisar dari 5-14% yang termasuk dalam kriteria rendah-sedang, dimana pada Stasiun 1 rata-rata sebesar 10,9-13,3%, Stasiun 2 rata-rata sebesar 5,92-10,18%, dan Stasiun 3 rata-rata sebesar 7,7-14%. Kartini Beach is one of the tourist areas in Jepara Regency. Various community activities and water infrastructure have become crucial needs in Kartini Beach. The existence of activities and buildings can cause changes in the distribution of grain size and content of organic matter. This study aims to determine the type and classification of sediments and the amount of organic matter content contained in sediments in Kartini Beach, Jepara. Data collection in this study is primary data collection in the form of sediment samples using sediment cores. Followed by analysis of sediment samples and analysis of organic matter content. The results showed that in Kartini Coast waters, Jepara had a sand sediment type where the grain size values ranged from 81-96%, which at Station 1 averaged 91,6-96%, Station 2 on average amounted to 93,5-96,9%, and Station 3 averaged 81,4-92,9%. Meanwhile, the content of organic matter contained in these waters has concentrations ranging from 5-14% which are included in the criteria of low-moderate, where at Station 1 an average of 10,9-13,3%, Station 2 an average of 5,92-10,18%, and Station 3 averaging 7,7-14%.
Nástup do veřejné mateřské školy v České republice: sonda do adaptace rodiče
Authors: Hejzlarová Eva , Mouralová Magdalena , Konrádová Kateřina
Published: July 2021

Until now, the process of adaptation in the education system has been researched by Czech scholars exclusively in connection to the adaptation of children. This empirical study examines the adaptation of parents in relation to the formation of the relationship between them and their child’s school. The theoretical framework of the study is based on literature conceptualizing adaptation, relationships between parents and schools, including the matter of partnership, and different roles of parents in school environments. Fourteen parents were instructed to write diary entries during the first twelve weeks of their eldest child’s attendance at a public kindergarten in the Czech Republic. Analysis of the data shows that the parents’ perspectives are not sufficiently considered in the process of adaptation in kindergarten. Still, the development of the child’s adaptation, as well as the requirements, expectations and support received from the kindergarten, have a fundamental influence on the establishment of the parent’s role in relation to their child’s school. The parent’s role in the course of the adaptation period is characterized by their interest in their child, their limited willingness to address their problems or their doubts regarding the school, minimization of their initiatives, their reliability in fulfilling operational and material requirements and their basic appreciation and acknowledgment of the school and its limitations.
Identying Factors That Influences Fradulences in Non-Life Insurance Companies
Authors: Pathmananathan P. Ravindran , Aseh Khairi
Published: July 2021

Insurance fraud is the most common form of fraud in the world, aside from tax evasion. By its very existence, the insurance industry is prone to deception. Basic income levels in Vietnam have a tendency to steadily rise as a result of improving socioeconomic conditions. As a result, the need for citizen security has increased and become more diverse.The aim of this study is to study the predictor/s of anti-insurance fraud among non-insurer companies in Vietnam. This study was conducted using a questionnaire that was completed by 51 employees who are currently working in the 11 non-life insurance company in Vietnam. It can be concluded that there exists a significant relationship between all the four independent variables which are namely external regulations, public context, management functions as well as underwriting guidance.
An Analysis on The Effect of Computer Literacy and Attitude Towards Internet Amongst Generation Y
Authors: Pathmananathan P. Ravindran , Aseh Khairi , Kenny Kamal
Published: July 2021

The Internet continues to change and evolve against a backdrop of unrelenting growth The Internet developed a ground-breaking open model for its own growth and governance that included all stakeholders.Generation Y has been recognized as a new market segment that will bring change in the platform of internet in an enormously connected world. The aim of this study is to analyze the attitude and the Internet usage among the generation. This study was carried out via a questionnaire involving 432 working professional who live around Kuala Lumpur Federal Territory and Selangor State, more precisely the author has selected MSC (Multimedia Super Corridor). It can be concluded that their attitude toward the internet played a significant role in their e-commerce activities and was a predicted factor. It is apparent that attitudes toward the internet and e-commerce practises have a major relationship.
Innovation Law and Policy and Business Model
Authors: Carvalho Sônia  Marise Salles , Aranha Elzo Alves
Published: July 2021

The objective of the research is twofold: a) to explore the law innovation and policy (ILP) in connection with the business model (BM) seeking to identify the main elements; b) to structure a set of key aspects based on the elements identified in the connections between ILP and BM. Next, we intend to apply the key aspects proposed in a Brazilian federal public university. The research is exploratory, qualitative, based on a case study. The findingss obtained point to six key aspects: value as a unit of analysis, value segment, systemic perspective, alignment among dimensions, balance between supply and demand and new configuration pattern. The findings obtained are innovative and contribute to fill the gap in the academic literature of ILP and BM. The findings have three practical implications, for strategic leaders of higher education institution (HEI), coordinators and professors of HEI and the federal government.
Combining Teaching Strategies, Learning Strategies, and Elements of Super Learning Principles
Authors: Pllana Duli
Published: July 2021

Blending teaching strategies, learning strategies, and  elements of super learning principles increase learning outcomes tremendously in any case, situation, or academic subject. Employing teaching and learning strategies adequately impact on an interactive session (academic subjects or any field) to a great degree, enhance learners’ motivation significantly, improve self confidence and self esteem of learners considerably, and soar learning outcomes substiantly. It is impossible to combine all learning and teaching strategies (there are many techniques, and a small space time to incorporate them in one lesson or an academic subject.) in an academic subject entirely. Accordingly, strategic teaching or learning establishes skills or techniques in addressing a lesson  or digesting information from the lesson. Also, learning results depend on the quantity and quality of combining learning and teaching strategies, and components of super learning principles. The greater the participation of  mixing techniques or skills in a lesson, the greater are the positive results in the learning outcomes. Teaching and learning strategies, and superlearning elements are in a close relationship with each other; teaching strategies imply learning strategies and elements of super learning. Combination of the three ingredients play a crucial  part in any lesson, academic subject, or general knowledge; mixing all these three components together wisely maximizes learning outcomes enormously.
The L2 Motivational Self System and the Instructional Willingness to Communicate in the Kuwaiti EFL Context
Authors: Alenezi Abdullah A. , Al-Saeed Shaima J. , Alazemi Abdullah M.
Published: July 2021

The study explores the relationship between Dörnyei’s (2005, 2009) L2 motivational self system (L2MSS) and the English as a foreign language (EFL) learners’ instructional willingness to communicate (IWTC). It examines specifically the impact of the three elements of the L2MSS, that is, the ideal self, ought-to self, and learning experience, on the components of the IWTC. The study used a quantitative method of data collection from a two-part questionnaire; both parts were answered by the same participants. The questionnaire was adapted and modified to fit the needs of the Arabic participants, who were 247 Kuwaiti college students.  A thorough confirmatory factor analysis was implemented to validate the L2MSS and IWTC questions. The outcomes of the study revealed that each part of the questionnaire was fit to test the data, and thus the tools were authenticated for future research in an Arabic context. In addition to highlighting the significant element of the motivational self, the study looked further into the construct of the IWTC and pinpointed its most important components. The findings show that the ideal self was significantly correlated with the learning responsibility component of the IWTC. The ought-to self was found to be insignificant, and the learning experience had no factor loading and thus was excluded.
Apaddharmaparva: Articulating the Dilemma on Ethics and Politics within the Epic, the Mahabharata
Authors: Sahgal Smita
Published: July 2021

The Mahabharata is an epic with encyclopaedic complexity. It weaves many mundane issues of political and social relevance with those of theology and philosophy. Without doubt the Mahabharata is a troubled story, a story of war and violence. Troubled times beckon distinct solutions, which appear at odds with socially recognized norms. The text understands these solutions in terms of apaddharma, the law of Exigency. We need to locate the concept and theory of apaddharma within the magnum Opus and attempt to comprehend its many layered meaning along with investigating if it were a digression from dharma. The vital issue is to postulate how it came to imply a law in the times of emergency. We mull over a number of issues that push one to use the tool of apaddharma. For instance, how do people negotiate crisis, especially the one that threatens their survival? Can a king justifiably stabilise his rule by becoming violent and what are the limits to political behaviour in the world of realpolitik? How does political conduct be adjusted within the frames of morality that demands steadfast conduct of ethical behaviour? Can the laws of apaddharma come to the rescue of the populace and the king? The dialectics becomes evident as we go deeper into studying the issue though our queries also start getting answered
Professorial Entrepreneurial Research: An Innovative and Comprehensive “Tri–Analytics Engine” via “Triodynamics” that uses In-Depth Triostatistics to Establish a Longitudinal Faculty Research Agenda
Authors: Osler II James Edward Osler II
Published: July 2021

The narrative in this paper provides an in-depth, novel, and innovative methodology to aid higher education faculty in the production of an innovative research agenda designed to trichotomously sustain, advance, and prolong their existing careers. The methodology used to do the aforementioned is referred to as the “Tri–Analytics Engine”. A “Tri–Analytics Engine” is a pioneering initial and accumulative advanced post hoc research practice grounded in Triostatistics. The Tri–Analytics Engine has an introductory methodology termed “Triodynamics” as starting foundational “base research operation” that sets the stage for future research efforts that have their foundation in the initial research topic. Triodynamics are a set of three trichotomous standards that aid the investigator in the creation of a post hoc research agenda after the primary Tri–Analysis analytic. A Tri–Analytics Engine is also a personal entrepreneurial inquiry-based ethos that is trichotomously complex, comprehensive, and cumulative that has Triostatistics at its core.
School Internal Organisation as a Correlate of Teachers’ Attrition and Retention in Bauchi Metropolis Secondary Schools, Nigerian
Authors: Adamu Martha Maigari , Adam Dr. Muhammad
Published: July 2021

This paper studied school internal organisation as a correlate of teachers’ attrition and retention in Bauchi metropolis secondary schools. To determine the extent to which compensation and benefits as relates to teachers’ attrition and retention is among the objectives of the study. Correlational research design was adopted. The population of the study consisted of all teachers’ of public secondary schools in Bauchi State. A sample of 50 was selected using table for determining sample size by research Advisor. The simple random sampling technique was employed in selecting the sample. A questionnaire was adapted from modified MetLife Survey of the American Teacher instrument from 2006 and UNESCO (2014), titled “Determinants of Teachers Attrition and Retention (DETAREQ)”. The validity of the instrument was ascertained. A reliability of .71 obtained using Cronbach Alpha. A multiple regression was used to analyzed data obtained. The results showed that Compensation and benefit has positive relationship with Teachers attrition and retention to a large extent. Therefore, Refresher courses /Training, Seminars /workshops should be organized by the Ministry of  Education to sensitize and educate teachers to change their mentality  and  provide  them  other  benefits  to  attract  and keep  them  in  the profession, were recommendations made among others.
Exploring the Cross-Level Impact of Counseling Satisfaction from the Longitudinal Study of Learning Outcomes: A Case Study of Economically Disadvantaged Students
Authors: Chun-Chieh Tseng , Cheng-Ping Chang
Published: July 2021

This paper discusses the connotations between the learning outcomes of economically disadvantaged students and time factors. We recruited 1,053 economically disadvantaged students from a private university as participants and collected their mean scores in professional courses for 4 years. After observing the initial learning outcomes and academic growth rates of the students, this study concluded that counseling satisfaction had a cross-level moderating effect on learning outcomes. Additionally, the learning outcomes of economically disadvantaged students in professional courses exhibited decelerating growth with time, whereas cross-level counseling satisfaction had a significant influence and moderating effect on academic growth rate.