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Stimulation of Deprivation Cycles with Spirulina platensis Feed Supplementation on Osphronemus gouramy Physiological Responses Simanjuntak, Sorta Basar Ida; Wibowo, Eko Setio; Indarmawan, Indarmawan
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 3 (2016): December 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v8i3.7274

Abstract

Spirulina platensis is a phytoplankton, the cell wall composed of complex sugars so easily digested by fish. The present study was carried out to investigate stimulation cycle of feed deprivation with feed supplemented S. platensis the best to increase growth, hematological and body composition of gurami (Osphronemus gouramy). Groups of 24 fish, each in triplicate, were exposed to four different treatment for a period of 56 days. Sample measurements of growth done every 14 days, hematological and body composition measurements carried out at the end of the experiment. Growth was significantly different between stimulation cycle of feed deprivation and the control (P<0.05). Conclusions result showed that stimulation cycles of feed deprivation could not improve growth and hematological, but could improve body composition. Feed deprivation is done to reduce the cost of production, high production costs due to high feed prices. During research on feed deprivation is done by giving commercial feed, this study is to provide feed supplementation S. platensis. Thus, the results of this study can be useful for science as S. platensis information can be used as a food supplement and and for the people cultivating gurami should be fed daily supplementation of S. platensis.How to CiteSimanjuntak, S. B. I., Wibowo, E. S. & Indarmawan, I. (2016). Stimulation of Deprivation Cycles with Spirulina platensis Feed Supplementation on Osphronemus gouramy Physiological Responses. Biosaintifika: Journal of Biology & Biology Education, 8(3), 378-385.
TAHAPAN PERKEMBANGAN ORGAN REPRODUKSI SEKSUAL PLANARIA DARI PERAIRAN LERENG GUNUNG SLAMET, BATURRADEN, BANYUMAS Palupi, Endah Sri; Puspita Sari, IG.A.Ayu Ratna; Wibowo, Eko Setio
Sains & Matematika Vol 3, No 2 (2015): April, Sains & Matematika
Publisher : Sains & Matematika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Planaria termasuk spesies dalam Filum Platyhelminthes Kelas Turbellaria. Planaria merupakan hewan triploblastik aselomata dengan bentuk tubuh simetri bilateral dengan habitat perairan tawar jernih, perairan laut dan terestrial. Planaria berkembang biak secara aseksual dengan fragmentasi dan secara seksual dengan pembentukan gamet. Penelitian ini bertujuan untuk mendeskripsikan tahapan perkembangan organ reproduksi seksual Planaria dari perairan lereng Gunung Slamet, Baturraden, Banyumas. Planaria diperoleh dengan menangkap menggunakan umpan hati ayam segar, lokasi pengambilan sampel planaria di perairan lereng Gunung Slamet, yaitu Curug Bayan, Lokawisata Baturraden dan Telaga Sunyi Baturraden, Banyumas. Sampel difi ksasi menggunakan Bouin, dibuat sayatan histologis dan diwarnai menggunakan pewarna Hematoxylin dan Eosin untuk mendapatkan struktur mikroanatomi guna identifi kasi tahapan perkembangan organ reproduksi seksualnya. Hasil yang diperoleh dianalisis menggunakan analisis deskriptif. Planaria yang diperoleh di perairan Curug Bayan didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 3 dan beberapa tahap 5. Planaria yang diperoleh di perairan Lokawisata Baturraden didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 1, sedangkan Planaria yang diperoleh di perairan telaga Sunyi didominasi ukuran sedang dan besar dengan perkembangan ovary tahap 4 dan testis tahap 4. Berdasarkan hasil tersebut dapat disimpulkan bahwa tahapan perkembangan organ reproduksi seksual planaria yang paling matang adalah planaria dari perairan Telaga sunyi yang didominasi planaria berukuran sedang dan besar. Kondisi perairan yang lebih alami dengan temperatur yang lebih rendah dan serasah yang melimpah pada perairan Telaga Sunyi memungkinkan habitat yang sesuai bagi planaria untuk survive dan berkembang biak. Planarian is species of Phylum Platyhelminthes, Class Turbellaria. Planarian is acelomate triplobastic animal, with a body of bilateral simetry and lives in clear freshwater, marine, and terrestrial as its habitat. Planarian reproduces asexually with fragmentation and sexually with gamet formation. The aim of this study was to describe planarian?s sexual reproduction organ development level in mount Slamet slope?s water, Baturraden, Banyumas. Planarians were obtained by baiting with fresh chicken liver; location of sampling on Mount Slamet were Curug Bayan, Lokawisata Baturraden, and Telaga Sunyi, Baturraden, Banyumas. Samples were fi xated with Bouin and stained with Hematoxylin and Eosin for histological structure to identify the sexual reproduction organ development stage. The results were analyzed descriptively. Total number of obtained planarian varied, however it wasn?t signifi cantly diferrent among sampling locations. Planarians of Curug Bayan were mostly in small to moderate size with ovary development of stage 2, testis of stage 3 and some of stage 5. Planarians of Lokawisata Baturraden were mostly in small to moderate size with ovary development of stage 2 and testis of stage 1. Planarians of Telaga Sunyi were mostly in moderate and big size with ovary development of stage 4 and testis of stage 4. It was concluded that planarian of Telaga Sunyi, with mostly moderate and big size, had the most matured sexual reproduction organs development. More natural water condition including lower temperature and abundant litter in Telaga Sunyi allows suitable habitat for planarian survival and planarian breeding.
Tahapan Perkembangan Organ Reproduksi Seksual Planaria dari Perairan Lereng Gunung Slamet, Baturraden, Banyumas Palupi, Endah Sri; Puspita Sari, IG.A.Ayu Ratna; Wibowo, Eko Setio
Sains & Matematika Vol 3, No 2 (2015): April, Sains & Matematika
Publisher : Sains & Matematika

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Planaria termasuk spesies dalam Filum Platyhelminthes Kelas Turbellaria. Planaria merupakan hewan triploblastik aselomata dengan bentuk tubuh simetri bilateral dengan habitat perairan tawar jernih, perairan laut dan terestrial. Planaria berkembang biak secara aseksual dengan fragmentasi dan secara seksual dengan pembentukan gamet. Penelitian ini bertujuan untuk mendeskripsikan tahapan perkembangan organ reproduksi seksual Planaria dari perairan lereng Gunung Slamet, Baturraden, Banyumas. Planaria diperoleh dengan menangkap menggunakan umpan hati ayam segar, lokasi pengambilan sampel planaria di perairan lereng Gunung Slamet, yaitu Curug Bayan, Lokawisata Baturraden dan Telaga Sunyi Baturraden, Banyumas. Sampel difi ksasi menggunakan Bouin, dibuat sayatan histologis dan diwarnai menggunakan pewarna Hematoxylin dan Eosin untuk mendapatkan struktur mikroanatomi guna identifi kasi tahapan perkembangan organ reproduksi seksualnya. Hasil yang diperoleh dianalisis menggunakan analisis deskriptif. Planaria yang diperoleh di perairan Curug Bayan didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 3 dan beberapa tahap 5. Planaria yang diperoleh di perairan Lokawisata Baturraden didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 1, sedangkan Planaria yang diperoleh di perairan telaga Sunyi didominasi ukuran sedang dan besar dengan perkembangan ovary tahap 4 dan testis tahap 4. Berdasarkan hasil tersebut dapat disimpulkan bahwa tahapan perkembangan organ reproduksi seksual planaria yang paling matang adalah planaria dari perairan Telaga sunyi yang didominasi planaria berukuran sedang dan besar. Kondisi perairan yang lebih alami dengan temperatur yang lebih rendah dan serasah yang melimpah pada perairan Telaga Sunyi memungkinkan habitat yang sesuai bagi planaria untuk survive dan berkembang biak. Planarian is species of Phylum Platyhelminthes, Class Turbellaria. Planarian is acelomate triplobastic animal, with a body of bilateral simetry and lives in clear freshwater, marine, and terrestrial as its habitat. Planarian reproduces asexually with fragmentation and sexually with gamet formation. The aim of this study was to describe planarian’s sexual reproduction organ development level in mount Slamet slope’s water, Baturraden, Banyumas. Planarians were obtained by baiting with fresh chicken liver; location of sampling on Mount Slamet were Curug Bayan, Lokawisata Baturraden, and Telaga Sunyi, Baturraden, Banyumas. Samples were fi xated with Bouin and stained with Hematoxylin and Eosin for histological structure to identify the sexual reproduction organ development stage. The results were analyzed descriptively. Total number of obtained planarian varied, however it wasn’t signifi cantly diferrent among sampling locations. Planarians of Curug Bayan were mostly in small to moderate size with ovary development of stage 2, testis of stage 3 and some of stage 5. Planarians of Lokawisata Baturraden were mostly in small to moderate size with ovary development of stage 2 and testis of stage 1. Planarians of Telaga Sunyi were mostly in moderate and big size with ovary development of stage 4 and testis of stage 4. It was concluded that planarian of Telaga Sunyi, with mostly moderate and big size, had the most matured sexual reproduction organs development. More natural water condition including lower temperature and abundant litter in Telaga Sunyi allows suitable habitat for planarian survival and planarian breeding.
Metabolism and Nutritional Content of Polychaeta Nereis sp. with Maintenance Salinity and Different Types of Feed Eko Setio Wibowo; Endah Sri Palupi; I G A Ayu Ratna Puspitasari; Atang Atang
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 3 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (371.928 KB) | DOI: 10.14710/ik.ijms.24.3.105-112

Abstract

Nereis sp. is an invertebrate member of Familia Nereidae, Classis Polychaeta that lives in the estuarin ecosystem as benthic. Nereis sp. is one of the natural foods that can trigger the maturation of shrimp gamete cells up to 70% because they contain high levels of amino acids and unsaturated fatty acids, but the fulfillment of Nereis sp. still rely from nature. That condition encourages the cultivation of Nereis sp., but there is not much information about it. This study aims to determine the metabolic rate and nutritional content of Nereis sp. with different maintenance salinity and feed.  This reasearch used immature Nereis sp with two different type of feed, i.e. with vegetable protein and animal protein. They were maintained in three different salinity i.e. 5, 15, and 25 ppt. The results showed that oxygen consumption rate of Nereis sp was affected by salinity of the medium, but was not influenced by the type of feed given. The highest oxygen consumption was observed in Nereis sp. that maintained at 25 ppt. The body protein content is influenced by the salinity and the type of feed given, while the fat content is not affected by the salinity and the feed. The highest protein, fat and carbohydrate content of the body was detected in salinity of 15 ppt and fed with vegetable protein foods.
Oxygen Consumption Rate of Polychaeta Nereis sp. Different Sizes and Type of Feed Eko Setio Wibowo; Endah Sri Palupi; I G A Ayu Ratna Puspitasari; Atang Atang
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 24, No 4 (2019): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.283 KB) | DOI: 10.14710/ik.ijms.24.4.159-163

Abstract

Nereis  sp. contains amino acids and unsaturated fatty acids that can improve the quality of gamete stem cells and the quality of the resulting larvae. Nereis  sp. can increase gamete cell maturation in the parent shrimp up to 70%. This triggers the exploitation these worms excessively in nature since there are no cultivation efforts to meet their needs. This condition encourages research on the biological aspects of Nereis  sp. to complement the information that can support the cultivation of the worms. This research was conducted on Nereis  sp. from the Jeruklegi Cilacap area with different types of feed. This study aims to determine the metabolic rate of the worms Nereis  sp. at different sizes by giving different types of feed. This research use immature Nereis  sp. which was maintained at 15 ppt salinity with three different body weight (0.3-0.6 g; 1.1-1.3 g and 1.8-2.04 g) with three different types of feed (D0 feed, feed flour of Spirulina sp. and ornamental fish feed tetra blitsz). The study was conducted experimentally with a randomized block design (RBD) method with six replications. The results showed the rate of oxygen consumption of Nereis  sp. influenced by the size and type of feed given (P<0.05). Nereis  sp. with size of 0.3-0.6 gr indicates the highest metabolic rate.  Nereis  sp. fed with flour of Spirulina sp. shows the highest metabolic rate.  Appropriate feed to support the growth of Nereis  sp. is D0 and tetra blits (low fiber feed). 
Survival Rate, Growth And Chemical Content of Dendronereis pinnaticirris (Polychaeta, Nereidae) In Maintenance With Different Food And Substrate Eko Setio Wibowo; Edy Yuwono; Purnama Sukardi; Asrul Sahri Siregar
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 25, No 2 (2020): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (216.811 KB) | DOI: 10.14710/ik.ijms.25.2.75-84

Abstract

The worm Dendronereis pinnaticirris is used as feed of shrimp broodstock in a hatchery, mainly because of its availability in the local market, and its nutritional content required for improving gonad maturation and post larvae production. The important economic value of the worm and the increasing demand for feed in shrimp hatcheries have led to an intense exploitation that suppers its population and the sustainability of the whole estuarine ecosystem. The study, which represents the starting point of large-scale production of the polychaete worm by culture in the artificial system, shall be undertaken. Accordingly, a production study using D. pinnaticirris juvenile was carried out under controlled conditions fed with two different feed (feed contains mainly plant protein and animal protein, respectively), and kept in three different substrates (substrate consists of mud and 8.78%, 37.34%, 39.17% sand, respectively). The treatments were arranged according to randomized completely block design in 8 (eight) replicates. The survival rate, body weight increment and growth, oxygen consumption, proximate body chemical, and fatty acid contents were measured. The results showed that growth and oxygen consumption was significantly influenced by a substrate and feed type (P<0.05).  Worms on the mud substrate with 39.17% sand, and feed containing vegetable protein showed the highest oxygen consumption.  Survival rate and chemical body content were not significantly influenced by the type of substrate and feed (P<0.05). The protein content of the worm was 32.02-43.81%, while fat content was 2.41-9.89%. Twenty different fatty acids were identified in the worm of all treatment groups. 
Sintasan, Pertumbuhan Spesifik Dan Konversi Pakan Polychaeta Nereis sp. Dari Kawasan Pertambakan Jeruklegi Cilacap Dengan Berbagai Jenis Pakan Eko Setio Wibowo; Atang Atang; I Gusti Agung Ayu Ratna Puspitasari; Endah Sri Palupi
Buletin Oseanografi Marina Vol 11, No 2 (2022): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v11i2.38111

Abstract

Cacing Nereis sp. mampu meningkatkan pematangan sel gamet sampai 70%, sehingga berpotensi untuk dikembangkan sebagai pakan induk udang dalam usaha meningkatkan hasil produksi budidaya udang, namun selama ini pemenuhan Nereis sp. sebagai pakan masih mengandalkan penangkapan dari alam. Kondisi ini mendorong adanya usaha domistikasi atau budidaya, tetapi belum banyak informasi tentang aspek biologi Nereis sp. untuk mendukung usaha budidaya. Penelitian ini untuk mengetahui sintasan, laju pertumbuhan spesifik dan konversi pakan Nereis sp. dari wilayah pertambakan Jeruklegi Cilacap yang diberi pakan berbeda, yang diharapkan dapat memberikan informasi tentang pemberian pakan yang sesuai dan optimum untuk menghasilkan sintasan dan pertumbuhan Nereis sp. dari kawasan Jeruklegi Cilacap. Penelitian dengan menggunakan Nereis sp. immature yang dipelihara pada salinitas 15 ppt dengan tiga jenis pakan berbeda (pakan D0, tepung Spirulina sp. dan ikan hias tetra bits). Metode penelitian dilakukan secara eksperimental dengan rancangan acak lengkap (RAL) dengan 6 ulangan. Hasil penelitian menunjukkan tingkat sintasan Nereis sp. tidak dipengaruhi oleh jenis pakan yang diberikan (P>0.05), sedangkan laju pertumbuhan dan efisiensi pakan Nereis sp. dipengaruhi oleh jenis pakan yang diberikan (P<0.05). Pertumbuhan dan efisiensi pakan Nereis sp. tertinggi saat diberi pakan D0. Hasil ini menunjukkan bahwa pakan D0 dapat mendukung pertumbuhan Nereis sp. dengan lebih baik dibandingkan jenis pakan yang lain.   Nereis sp. able to increase the maturation of gamete cells up to 70%, so that it has the potential to be developed as broodstock shrimp feed to increase the yield of shrimp culture. However, so far, the fulfilment of Nereis sp. as feed still relying on capture from nature. This condition encourages domestication or cultivation, but there is not much information about the biological aspects of Nereis sp. to support cultivation business. This study was to determine the survival rate, specific growth rate and feed conversion of Nereis sp. from the Jeruklegi Cilacap pond area which were fed different feeds, which were expected to provide information on appropriate and optimum feeding to produce survival and growth of Nereis sp. from Jeruklegi area of Cilacap. The research using Nereis sp. immature, which is maintaineds at 15 ppt salinity with three different types of feed (D0, Flour of Spirulina sp. and ornamental fish feed tetra blitsz). The study was conducted experimentally with a completely randomized design method (CRD) with six replications. The results showed the level of survival of Nereis sp. not influenced by the type of feed given (P> 0.05). While the growth rate and feed efficiency of Nereis sp. influenced by the type of feed offered (P <0.05). Growth and feed efficiency of Nereis sp. highest when fed D0. These results indicate that D0 feed can support the growth of Nereis sp. better than other types of feed. 
Pertumbuhan, Retensi Protein, dan Perkembangan Gonad Polychaeta Nereis sp. Dengan Salinitas dan Pakan Berbeda Eko Setio Wibowo; Atang Atang; I G A Ayu Ratna Puspitasari; Endah Sri Palupi
Al-Kauniyah: Jurnal Biologi Vol 14, No 2 (2021): AL-KAUNIYAH JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v14i2.17463

Abstract

AbstrakPolychaeta Nereis sp. memiliki kandungan asam amino dan asam lemak tak jenuh yang tinggi, sesuai untuk pakan udang dalam meningkatkan pematangan gonad untuk produksi larva udang. Potensi ini mendorong pengembangan usaha budi daya Nereis sp. sebagai pakan induk udang.  Usaha ini belum berkembang karena informasi tentang aspek biologi yang mendukung budi daya Nereis sp. masih terbatas. Oleh karena itu, studi tentang aspek biologi Nereis sp. dengan berbagai modifikasi lingkungan dan pakan perlu dilakukan untuk menunjang keberhasilan usaha budi daya Nereis sp.  Penelitian ini bertujuan mengetahui pertumbuhan spesifik, retensi protein, dan perkembangan gonad Nereis sp. dari Kawasan Jeruklegi Cilacap dengan salinitas dan pakan yang berbeda. Hasilnya akan digunakan sebagai informasi untuk mendukung budi daya Nereis sp. yang berkelanjutan. Penelitian dilakukan dengan menggunakan Nereis sp. immature dengan dua jenis pakan, pada tiga salinitas yang berbeda (5, 15, dan 25 ppt).  Penelitian dilakukan dengan metode rancangan acak kelompok dengan tiga kali ulangan. Hasil penelitian menunjukkan bahwa pertumbuhan spesifik optimum Nereis sp. pada pemeliharaan salinitas 15 ppt dengan jenis pakan berprotein hewani.  Salinitas 15 ppt dan pakan berprotein hewani juga menghasilkan retensi protein tetinggi. Salinitas pemeliharaan dan jenis pakan belum mempengaruhi perkembangan gonad secara signifikan. Pemeliharaan Nereis sp. dengan salinitas 15 ppt dan pakan berprotein hewani menunjukkan hasil terbaik.Abstract Polychaeta Nereis sp. has a high content of amino acids and unsaturated fatty acids, suitable for shrimp feed in increasing gonadal maturation for shrimp larvae production.  This potential encourages the development of Nereis sp. to meet the needs of raw material for shrimp feed.  This business has not developed due to limitations in information about the biological aspects that support the cultivation of Nereis sp. Therefore, some studies about biological aspects of Nereis sp. with various environmental and feed modifications need to be conducted to support the success of its cultivation. This study aims to determine the specific growth, protein retention, and gonad development of Nereis sp. from the Jeruklegi Cilacap area with different salinity and feed. The results will be used as information to support the sustainable cultivation of Nereis sp. Conducted experimentally with a randomized block design method with three replications, the study used immature Nereis sp. with two types of feed that were maintained at three different salinity (5, 15, and 25 ppt). The results showed that the highest specific growth was Nereis sp. in 15 ppt of salinity with animal protein feed. The salinity 15 ppt and animal protein feed also resulted in the highest protein retention. However, the salinity maintenance and type of feed have not significantly affected gonad development. Maintenance of Nereis sp. with 15 ppt salinity and animal protein feed showed the best results.
Aspek Biologi dan Lingkungan Polychaeta Nereis sp. di Kawasan Pertambakan Desa Jeruklegi Kabupaten Cilacap: Potensinya Sebagai Pakan Alami Udang Eko Setio wibowo; Endah Sri Palupi; IGA. Ayu Ratna Puspita Sari; Atang Atang; Hana Hana
PSEJ (Pancasakti Science Education Journal) Vol. 3 No. 1 (2018)
Publisher : Program Studi Pendidikan IPA, FKIP Universitas Pancasakti (UPS) Tegal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.771 KB)

Abstract

Cacing Nereis Sp. merupakan hewan invertebrata anggota Familia Nereidae, Classis Polychaeta yang hidupdi ekosistem estuarin, sebagai benthik. Nereis Sp. dapat dimanfaatkan untuk pakan udang karenamengandung asam amino dan asam lemak tak jenuh yang tinggi, untuk menyempurnakan mutu sel gametpada induk udang dan meningkatkan mutu larva. Cacing ini banyak terdapat di daerah pertambakanCilacap tetapi masih belum banyak informasi tentang aspek biologi cacing Nereis Sp. yang di hidup diwilayah ini, sehingga perlu dilakukan studi tentang aspek biologi cacing Nereis Sp. di wilayah ini untukinformasi usaha pengembangan budidaya cacing lur. peneiltian ini dilakukan dengan metode survei.Pengambilan sampel di daerah pertambakan desa Jeruklegi kabupaten Cilacap dalam empat stasiundengan tiga titik pengambilan sampel dan di ulang tiga kali setiap dua minggu sekali. Hasil penelitianmenunjukkan bahwa kondisi aspek biologi cacing Nereis sp. dari empat stasiun pengambilan, yaitu jumlahsegmen; berat tubuh dan rasio kelamin tidak berbeda nyata (p>0,05). Kondisi Lingkungan masihmendukung kehidupan Nereis sp. untuk tumbuh dan berkembang biak
Tahapan Perkembangan Organ Reproduksi Seksual Planaria dari Perairan Lereng Gunung Slamet, Baturraden, Banyumas Endah Sri Palupi; IG.A.Ayu Ratna Puspita Sari; Eko Setio Wibowo
Sains dan Matematika Vol. 3 No. 2 (2015): April, Sains & Matematika
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Planaria termasuk spesies dalam Filum Platyhelminthes Kelas Turbellaria. Planaria merupakan hewan triploblastik aselomata dengan bentuk tubuh simetri bilateral dengan habitat perairan tawar jernih, perairan laut dan terestrial. Planaria berkembang biak secara aseksual dengan fragmentasi dan secara seksual dengan pembentukan gamet. Penelitian ini bertujuan untuk mendeskripsikan tahapan perkembangan organ reproduksi seksual Planaria dari perairan lereng Gunung Slamet, Baturraden, Banyumas. Planaria diperoleh dengan menangkap menggunakan umpan hati ayam segar, lokasi pengambilan sampel planaria di perairan lereng Gunung Slamet, yaitu Curug Bayan, Lokawisata Baturraden dan Telaga Sunyi Baturraden, Banyumas. Sampel difi ksasi menggunakan Bouin, dibuat sayatan histologis dan diwarnai menggunakan pewarna Hematoxylin dan Eosin untuk mendapatkan struktur mikroanatomi guna identifi kasi tahapan perkembangan organ reproduksi seksualnya. Hasil yang diperoleh dianalisis menggunakan analisis deskriptif. Planaria yang diperoleh di perairan Curug Bayan didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 3 dan beberapa tahap 5. Planaria yang diperoleh di perairan Lokawisata Baturraden didominasi ukuran kecil dan sedang dengan perkembangan ovary tahap 2 dan testis tahap 1, sedangkan Planaria yang diperoleh di perairan telaga Sunyi didominasi ukuran sedang dan besar dengan perkembangan ovary tahap 4 dan testis tahap 4. Berdasarkan hasil tersebut dapat disimpulkan bahwa tahapan perkembangan organ reproduksi seksual planaria yang paling matang adalah planaria dari perairan Telaga sunyi yang didominasi planaria berukuran sedang dan besar. Kondisi perairan yang lebih alami dengan temperatur yang lebih rendah dan serasah yang melimpah pada perairan Telaga Sunyi memungkinkan habitat yang sesuai bagi planaria untuk survive dan berkembang biak. Planarian is species of Phylum Platyhelminthes, Class Turbellaria. Planarian is acelomate triplobastic animal, with a body of bilateral simetry and lives in clear freshwater, marine, and terrestrial as its habitat. Planarian reproduces asexually with fragmentation and sexually with gamet formation. The aim of this study was to describe planarians sexual reproduction organ development level in mount Slamet slopes water, Baturraden, Banyumas. Planarians were obtained by baiting with fresh chicken liver; location of sampling on Mount Slamet were Curug Bayan, Lokawisata Baturraden, and Telaga Sunyi, Baturraden, Banyumas. Samples were fi xated with Bouin and stained with Hematoxylin and Eosin for histological structure to identify the sexual reproduction organ development stage. The results were analyzed descriptively. Total number of obtained planarian varied, however it wasnt signifi cantly diferrent among sampling locations. Planarians of Curug Bayan were mostly in small to moderate size with ovary development of stage 2, testis of stage 3 and some of stage 5. Planarians of Lokawisata Baturraden were mostly in small to moderate size with ovary development of stage 2 and testis of stage 1. Planarians of Telaga Sunyi were mostly in moderate and big size with ovary development of stage 4 and testis of stage 4. It was concluded that planarian of Telaga Sunyi, with mostly moderate and big size, had the most matured sexual reproduction organs development. More natural water condition including lower temperature and abundant litter in Telaga Sunyi allows suitable habitat for planarian survival and planarian breeding.