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Journal articles on the topic 'Thallophytes'

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Published: 4 June 2021
Last updated: 2 February 2022

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1

Strother, Paul K. "New species of Nematothallus from the Silurian Bloomsburg Formation of Pennsylvania." Journal of Paleontology 62, no. 6 (November 1988): 967–82. http://dx.doi.org/10.1017/s0022336000030237.

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The early terrestrial fossil record contains numerous Siluro-Devonian problematic Thallophyta which have morphological and habitat characteristics intermediate between the algae and the embryophytic plant kingdom. Three new species of the genus Nematothallus Lang (N. taenia, N. lobata, and N. elliptica) are described from a coaly lens in the Bloomsburg Formation (Ludlow). They are included in the order Nematophytales, which is placed in a new informal taxonomic group, Paraphyta, intended to include enigmatic, terrestrial plant-like fossils. These species designations are based upon the gross morphology of carbonized thalli which consist of an underlying anatomy of flattened tubular elements. The association and attachment of cuticles and axes of ?Prototaxites to Nematothallus is clearly demonstrated in these collections. The morphological and anatomical variety expressed in the numerous fragments of thalli from the deposit implies moderate levels of organic diversity in a “flora” of nonvascular, terrestrial plant-like thallophytes which predates the adaptive radiation of the embryophytes.
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2

Carlquist, Sherwin. "Organisation et Biologie des Thallophytes. R. Gorenflot , M. Guern." Quarterly Review of Biology 66, no. 4 (December 1991): 493–94. http://dx.doi.org/10.1086/417371.

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3

Du, Wei, Xun Lian Wang, Tsuyoshi Komiya, Ran Zhao, and Yue Wang. "Dendroid multicellular thallophytes preserved in a Neoproterozoic black phosphorite in southern China." Alcheringa: An Australasian Journal of Palaeontology 41, no. 1 (April 19, 2016): 1–11. http://dx.doi.org/10.1080/03115518.2016.1159408.

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4

YUN, ZHANG. "Multicellular thallophytes with differentiated tissues from Late Proterozoic phosphate rocks of South China." Lethaia 22, no. 2 (April 1989): 113–32. http://dx.doi.org/10.1111/j.1502-3931.1989.tb01674.x.

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5

YUN, ZHANG, and YUAN XUN-LAl. "New data on multicellular thallophytes and fragments of cellular tissues from Late Proterozoic phosphate rocks, South China." Lethaia 25, no. 1 (January 1992): 1–18. http://dx.doi.org/10.1111/j.1502-3931.1992.tb01788.x.

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6

Tinn, O., T. Meidla, L. Ainsaar, and T. Pani. "Thallophytic algal flora from a new Silurian Lagerstätte." Estonian Journal of Earth Sciences 58, no. 1 (2009): 38. http://dx.doi.org/10.3176/earth.2009.1.04.

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7

LoDuca, Steven T. "The green algaChaetocladus(Dasycladales)." Journal of Paleontology 71, no. 5 (September 1997): 940–49. http://dx.doi.org/10.1017/s0022336000035873.

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Two species of the enigmatic algaChaetocladus, C. ruedemanni(new species) andC. dubius(previously regarded as a graptolite incertae sedis), are described from the Silurian Lockport Group of New York and Ontario, Canada, respectively. A comprehensive investigation reveals that these and otherChaetocladustaxa occur in distinctive Konservat-Lagerstätten in association with other thallophytic algae, annelid worms, and lightly sclerotized arthropods. The sedimentology, taphonomy, and biotic composition ofChaetocladus-bearing deposits indicate that this alga thrived in shallow, stagnant, occasionally storm-agitated marine environments. In these settings, preservation of thallophytic algae and associated soft-bodied animals apparently was facilitated by a combination of obrution, anoxia, and early diagenesis of the burial muds.The morphology ofChaetocladuscorresponds to that characteristic of the green alga order Dasycladales, and it is herein referred to this long-ranging taxon as a representative of a new subtribe (Chaetocladinae, new subtribe) within the tribe Salpingoporelleae (emended herein), family Triploporellaceae (emended herein). This euspondyl, endosporate genus extends the range of the euspondyl dasyclads significantly, from the Early Devonian back to the Middle Ordovician, and bridges an evolutionary gap between early Paleozoic aspondyl, endosporate forms and middle Paleozoic euspondyl, cladosporate forms.
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8

Singkoh, Marina FO. "AKTIVITAS ANTIBAKTERI EKSTRAK ALGA LAUT Caulerpa racemosa DARI PERAIRAN PULAU NAIN." JURNAL PERIKANAN DAN KELAUTAN TROPIS 7, no. 3 (December 30, 2011): 123. http://dx.doi.org/10.35800/jpkt.7.3.2011.189.

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ABSTRACTAlgae or seaweed is the dominant part of marine plants. Morphological-ly, it is categorized as non-vascular plants (Thallophyta) because it has no specific structural configuration such as roots, stems and leaves. This marine algae is found abundantly in the waters of Pulau Nain. Algae from these waters was tested in the laboratory to obtain pharmaceutical preparations to be used as antibacterial active ingredients. This study was carried out to determine the antibacterial activity of the Caulerpa racemosa algae. Antibacterial activity test showed that the test solution of C. racemosa algae has antibacterial activity on all five test bacteria. The size of inhibition zones formed was relatively smaller, when compared to the size of inhibition zone formed by the comparative antibiotic compounds.Keywords: Caulerpa racemosa, seaweed, antibiotic.ABSTRAKAlga atau ganggang laut (seaweed) adalah bagian terbesar dari tumbuhan laut, dimana secara morfologi dapat dikelompokkan kedalam golongan tumbuhan tidak berpembuluh (Thallophyta) karena tidak memiliki perbedaan susunan kerangka seperti akar, batang dan daun. Berdasarkan pengamatan di lapangan, alga laut banyak ditemukan di daerah perairan Pulau Nain. Dari perairan ini selanjutnya dilakukan pengujian secara laboratories untuk memperoleh sediaan farmasi yang digunakan sebagai bahan aktif antibakteri. Penelitian ini dilakukan dengan tujuan untuk menentukan aktivitas antibakteri dari alga Caulerpa racemosa. Hasil pengujian aktivitas antibakteri menunjukkan bahwa larutan uji dari alga C. racemosa memiliki aktivitas antibakteri pada ke 5 bakteri uji yang diujikan. Ukuran zona hambat yang terbentuk relatif lebih kecil, jika dibandingkan dengan ukuran zona hambat yang dibentuk oleh senyawa antibiotika pembanding.Kata kunci: Caulerpa racemosa, ganggang laut, antibiotik.
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9

Smriga, Miro, and Hiroshi Saito. "Effect of selected thallophytic glucans on learning behaviour and short-term potentiation." Phytotherapy Research 14, no. 3 (May 2000): 153–55. http://dx.doi.org/10.1002/(sici)1099-1573(200005)14:3<153::aid-ptr666>3.0.co;2-j.

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10

Wang, Yi, Jisuo Jin, and Renbin Zhan. "A New Noncalcified Thallophytic Alga from the Lower Silurian of Anticosti Island, Eastern Canada." International Journal of Plant Sciences 175, no. 3 (March 2014): 359–68. http://dx.doi.org/10.1086/674451.

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11

Kore, Melkianus Mola, Merpiseldin Nitsae, and Sonya T. M. Nge. "UJI AKTIVITAS ANTIOKSIDAN PADA GANGGANG COKELAT ( Sargassum polycystum ) DAN GANGANG HIJAU (Euchema cottoni) PADA PERAIRAN DAHI’ AE." Indigenous Biologi : Jurnal Pendidikan dan Sains Biologi 1, no. 3 (January 26, 2019): 1–9. http://dx.doi.org/10.33323/indigenous.v1i3.7.

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Rumput laut merupakan tumbuhan yang hidup di laut dan merupakan jenis makroalga. Tanaman ganggang ini adalah ganggang multiseluler devisi Thallophyta. Rumput laut tidak termaksud tumbuhan sejati karena tidak memiliki akar, batang dan daun. Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan pada ganggang cokelat jenis Sargassum polycystum dan ganggang hijau jenis Eucheuma cottonii pada perairan Dahi’Ae. Penelitian ini bersifat eksperimental dengan mengunakan metode 1,1-diphenyl-2-picrylhydrazil (DPPH), dengan mengunakan 3 variasi konsentrasi (50 ppm, 75 pm, dan 100 ppm) dan 5 kali ulangan. Data yang diperoleh dianalisis untuk mendaptkan nilai % IC50. Dari plot tersebut akan diperoleh persamaan regresi linear y = ax + b. Berdasarkan persamaan ini aktivitas antioksidan secara berturut-turut pada Sargassum polycystum adalah 242,02 ppm dan Euchema cottoni adalah 169,06 ppm. Kedua sampel tersebut tergolong dalam aktivitas antioksidan sedang, sehingga perlu dianalisis aktivitas antioksidan untuk S. polycystum pada konsentrasi tinggi sedangkan E.cottoni pada konsentrasi rendah.
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12

Barone, Roberto, Lorenzo De Napoli, Luciano Mayol, Marina Paolucci, Maria Grazia Volpe, Luigi D’Elia, Antonino Pollio, et al. "Autotrophic and Heterotrophic Growth Conditions Modify Biomolecole Production in the Microalga Galdieria sulphuraria (Cyanidiophyceae, Rhodophyta)." Marine Drugs 18, no. 3 (March 18, 2020): 169. http://dx.doi.org/10.3390/md18030169.

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Algae have multiple similarities with fungi, with both belonging to the Thallophyte, a polyphyletic group of non-mobile organisms grouped together on the basis of similar characteristics, but not sharing a common ancestor. The main difference between algae and fungi is noted in their metabolism. In fact, although algae have chlorophyll-bearing thalloids and are autotrophic organisms, fungi lack chlorophyll and are heterotrophic, not able to synthesize their own nutrients. However, our studies have shown that the extremophilic microalga Galderia sulphuraria (GS) can also grow very well in heterotrophic conditions like fungi. This study was carried out using several approaches such as scanning electron microscope (SEM), gas chromatography/mass spectrometry (GC/MS), and infrared spectrophotometry (ATR-FTIR). Results showed that the GS, strain ACUF 064, cultured in autotrophic (AGS) and heterotrophic (HGS) conditions, produced different biomolecules. In particular, when grown in HGS, the algae (i) was 30% larger, with an increase in carbon mass that was 20% greater than AGS; (ii) produced higher quantities of stearic acid, oleic acid, monounsaturated fatty acids (MUFAs), and ergosterol; (iii) produced lower quantities of fatty acid methyl esters (FAMEs) such as methyl palmytate, and methyl linoleate, saturated fatty acids (SFAs), and poyliunsaturated fatty acids (PUFAs). ATR-FTIR and principal component analysis (PCA) statistical analysis confirmed that the macromolecular content of HGS was significantly different from AGS. The ability to produce different macromolecules by changing the trophic conditions may represent an interesting strategy to induce microalgae to produce different biomolecules that can find applications in several fields such as food, feed, nutraceutical, or energy production.
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13

Ain, Nur, Ruswahyuni, and Niniek Widyorini. "HUBUNGAN KERAPATAN RUMPUT LAUT DENGAN SUBSTRAT DASAR BERBEDA DI PERAIRAN PANTAI BANDENGAN, JEPARA." Management of Aquatic Resources Journal (MAQUARES) 3, no. 1 (January 29, 2014): 99–107. http://dx.doi.org/10.14710/marj.v3i1.4426.

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Pantai Bandengan adalah salah satu pantai pesisir utara Jawa yang terletak di Kabupaten Jepara, Jawa Tengah. Kabupaten Jepara memiliki potensi sumberdaya pesisir yang besar ditinjau dari keberadaan garis pantainya lebih dari 72 Km. Pantai Bandengan ini juga sebagai habitat rumput lautyang merupakan tumbuhan laut dasar perairan (fitobentos), makroalga, dan termasuk Thallophyta. Rumput laut tergolong tanaman yang hidupnya melekat pada substrat, seperti karang, lumpur, pasir, batu, dan benda keras lainnya atau bahkan melekat pada tumbuhan lain secara epifitik.Penelitian ini bertujuan mengetahui hubungan kerapatan rumput laut dengan substrat dasar berbeda di perairan Pantai Bandengan. Metode yang digunakan dalam penelitian ini deskriptif menggunakan line transek sepanjang 100 meter dan kuadran transek 1x1 meter dengan tiga kali pengambilan. Setiap kuadran transek dilakukan pengukuran parameter fisika dan kimia meliputi kedalaman, kecerahan, kecepatan arus, suhu air, dan pH (untuk mendukung hasil data sampling).Hasil yang didapatkan pada penelitian ini adalah sembilan jenis rumput laut yaitu Halimeda opuntia; Halimeda descoides; Halimeda macroloba; Chordoria flagelliformis; Padina crassa; Sargassum yendoi; Sargassum piluliferum; Sargassum confusum; dan Sargassum duplicatum. Kerapatan tertinggi ditemukan pada Halimeda opuntia (18,19%) atau total 103 individu dengan penutupan substrat (12,54 m2, terbanyak pada substrat pecahan karang). Sedangkan penutupan tertinggi terdapat pada jenis Sargassum duplicatum yaitu 15 m2. Berdasarkan hasil analisa data Chi Kuadrat didapatkan nilai X2 hitung sebesar 72,00 dan nilai X2 tabel sebesar 21,026. Hal tersebut dapat dinyatakan ada hubungan kerapatan rumput laut terhadap substrat dasar karena X2 hitung ≥ X2 tabel yang menyatakan terima H1 tolak H0.
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14

Lenama, Endang, Novi I. Bullu, and Alfred G. O. Kase. "STRUKTUR KOMUNITAS MAKROALGA DI PERAIRAN PANTAI PALIBO KECAMATAN KABOLA KABUPATEN ALOR." Indigenous Biologi : Jurnal Pendidikan dan Sains Biologi 2, no. 2 (July 13, 2020): 73–84. http://dx.doi.org/10.33323/indigenous.v2i2.32.

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Salah satu komponen penyusun ekosistem wilayah pesisir yang sangat penting dan memberikan kontribusi yang besar bagi ekonomi Indonesia adalah makroalga laut atau rumput laut. Nama rumput laut (ganggang laut) digunakan untuk menyebut tumbuhan laut yang hidup di dasar perairan (fitobentos), berukuran besar dan tergolong dalam divisi thallophyta. Kehadiran jenis makroalga di perairan Kelurahan Kabola, Kecamatan Kabola, Kabupaten Alor berperan penting dalam pembentukan ekosistem terumbu karang yaitu sebagai tempat berlindung biota-biota kecil seperti benih ikan dan udang. Tujuan dari penelitian ini yaitu untuk mengetahui struktur komunitas makroalga yang terdapat di Pantai Palibo Kecamatan Kabola Kabupaten Alor. Penelitian ini telah dilakukan pada bulan Januari sampai Februari 2019. Metode pengumpulan data yang dilakukan dalam penelitian ini yaitu dengan menggunakan metode sampling kuadrat. Pengambilan sampel dilakukan pada tiga transek (jarak antar transek 20 m), dengan menggunakan plot berukuran 1 x 1 m (jarak antar plot 5 m). Pada setiap plot dihitung jumlah individu dari setiap spesies makroalaga yang ditemukan. Analisis dilakukan untuk mendapatkan parameter epadatan, keanekaragaman, keseragaman dan dominasi. Faktor fisik-kimia perairan yang diambil adalah suhu, pH dan salinitas. Dari hasil penelitian ditemukan 11 spesies makroalga yang terdiri dari alga hijau (Chlorophycea) 3 spesies, alga coklat (Phaeophyceae) 4 spesies, dan alga merah (Rhodophyceae)4 spesies. Nilai kepadatan tertinggi dimiliki oleh spesies Padina boergesenii (38,583 individu/m2), sedangkan terendah dimiliki oleh spesies Halimeda opuntia (0,66 individu/m2). Indeks keanekaragaman yang diperoleh sebesar 1,65 dan dikategorikan sedang, indeks keseragaman sebesar 1,59 dikategorikan stabil dan indeks dominasi sebesar 0,25 dikategorikan rendah.
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15

Sukiman, Mursal Ghazali, Hijjatul Husna,. "Diversitas dan Karakteristik Alga Merah (Rhodophyta) pada Akar Mangrove di Teluk Serewe Kabupaten Lombok Timur." Jurnal Biologi Tropis 18, no. 1 (June 28, 2018): 80. http://dx.doi.org/10.29303/jbt.v18i1.732.

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Abstrak Alga merah (Rhodophyta) merupakan tumbuhan tingkat rendah yang umumnya tumbuh melekat pada substrat tertentu seperti pada karang, lumpur, pasir, batu dan benda keras lainnya. Salah satunya melekat pada mangrove yang merupakan kawasan bernutrisi tinggi. Salah satu daerah yang memiliki hutan mangrove cukup luas ialah Teluk Serewe Kecamatan Jerowaru Lombok Timur. Penelitian ini bertujuan untuk mengetahui keanekaragaman jenis dan karakteristik alga merah yang terdapat pada akar mangrove. Pengambilan sampel pada 4 stasiun menggunakan metode purposive sampling dan jelajah pada saat air surut. Jarak pengambilan sampel yaitu 800 m pada setiap stasiun. Berdasarkan hasil penelitian alga merah yang di peroleh sebanyak 11 spesies yaitu, 4 spesies dari genus Bostrychia, 3 spesies dari genus Caloglossa, 2 spesies dari genus Catenella, 1 spesies dari genus Gelidium, 1 spesies dari genus Stictosiphonia. Karakteristik alga merah yang menempel pada akar mangrove yaitu bentuk talus silindris dan menyerupai daun (blade), percabangan dikotom atau monopodial dengan sel polysiphonous..Kata Kunci: Alga merah, Hutan Mangrove, Lingkungan AbstractRed algae are Thallophyta that generally grow attached to certain substrates such as in coral, mud, sand, and other hard objects. One of them is attached to the mangrove which is a highly nutritious area. One of the forests that have mangrove forest is quite wide is Serewe Village, Jerowaru District East Lombok. This study aims to determine the diversity of species and red algae characteristics found in mangrove root. Sampling at four stations using purposive sampling method and roaming at low tide. The distance of sampling is 800m at each station. Based on the results of the study of red algae obtained as many as 11 species, namely 4 species of the genus Bostrychia, 3 species of genus Caloglassa, 2 species of genus Catenella, 1 species of genus Gelidium, 1 species of genus Stictosiphonia. Characteristics of red algae attached to mangrove root that forms cylindrical thallus and has branching leaf (blade) dichotomy or monopodial with polysiphonous cells.Keyword :Red Algae, Mangrove Forest and Environment.
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16

Risse-Buhl, Ute, Christine Anlanger, Christian Noss, Andreas Lorke, Daniel von Schiller, and Markus Weitere. "Hydromorphologic Sorting of In-Stream Nitrogen Uptake Across Spatial Scales." Ecosystems, December 8, 2020. http://dx.doi.org/10.1007/s10021-020-00576-7.

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AbstractNitrogen (N) uptake is a key process in stream ecosystems that is mediated mainly by benthic microorganisms (biofilms on different substrata) and has implications for the biogeochemical fluxes at catchment scale and beyond. Here, we focused on the drivers of assimilatory N uptake, especially the effects of hydromorphology and other environmental constraints, across three spatial scales: micro, meso and reach. In two seasons (summer and spring), we performed whole-reach 15N-labelled ammonium injection experiments in two montane, gravel-bed stream reaches with riffle–pool sequences. N uptake was highest in epilithic biofilms, thallophytes and roots (min–max range 0.2–545.2 mg N m−2 day−1) and lowest in leaves, wood and fine benthic organic matter (0.05–209.2 mg N m−2 day−1). At the microscale, N uptake of all primary uptake compartments except wood was higher in riffles than in pools. At the mesoscale, hydromorphology determined the distribution of primary uptake compartments, with fast-flowing riffles being dominated by biologically more active compartments and pools being dominated by biologically less active compartments. Despite a lower biomass of primary uptake compartments, mesoscale N uptake was 1.7–3.0 times higher in riffles than in pools. At reach scale, N uptake ranged from 79.6 to 334.1 mg N m−2 day−1. Highest reach-scale N uptake was caused by a bloom of thallopyhtes, mainly filamentous autotrophs, during stable low discharge and high light conditions. Our results reveal the important role of hydromorphologic sorting of primary uptake compartments at mesoscale as a controlling factor for reach-scale N uptake in streams.
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17

Jefri, Edwin, Inayah Yasir, and Syafiuddin Syafiuddin. "KOMPOSISI JENIS BIOFOULING PADA TIRAM MUTIARA (PINCTADA MAXIMA) DI LAHAN BUDIDAYA PT. AUTORE PEARL CULTURE LOMBOK." Jurnal Ilmu Kelautan SPERMONDE 3, no. 2 (December 10, 2017). http://dx.doi.org/10.20956/jiks.v3i2.3001.

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Cultivation of pearl oyster Pinctada maxima types are increasingly in demand in Indonesia. This oyster living and concentrated on waters that have coral reefs and sandy rubble. Oyster cultivation is very promising given pearls produced have a high economic value. Eventhough, pearl oyster farming efforts not always performing well because there is a possibility of oysters will get the disease and even death. One reason is their biofouling attached to the basket or on the oyster shell is maintained. The existence and amount of biofouling usually varies depending on the time and conditions of the waters where the cultivation have been. This study aims to determine the types of biofouling were found at three different sites located on land cultivation PT. Pearl Culture Autrore Lombok. Study sample is limited to biofouling found on new and used baskets and pearl oyster shells P. maxima. The main parameters measured were the species composition and abundance, while the supporters of the parameters measured were temperature, salinity, current speed, the brightness of the waters and TSS (Total Suspended Solid). The results found 36 types of biofouling, including 21 types of animal groups with six phyla (arthropods, bryozoans, annelids, cnidarians, sponges and molluscs), and 15 species of the plant with two divisio (Spermatophyta and Thallophyta). In addition, it was found that water conditions have an influence on the biomass and the number of types of biofouling and the distance between substations in each station does not have a significant influence on biomass and the number of types of biofouling.Keywords: Biofouling, Pearl Oyster (Pinctada maxima ), PT. Autore Pearl Culture Lombok
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