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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management
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Articles 687 Documents
Daerah Rawan Genangan Rob di Wilayah Semarang Ramadhany, Apriliawan Setiya; Subardjo, Petrus; Suryo, Agus Anugroho Dwi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (221.091 KB) | DOI: 10.14710/jmr.v1i2.2035

Abstract

This study aims to determine the broad tidal inundation during the study and the level of vulnerability to tidal inundation that occurred in Semarang. Benefit of this study is to provide information about the areas that are prone to rob puddles and how much the extent area of rob that occur on the mainland of Semarang. There are five levels of vulnerability classes in Semarang area, starting from the very vulnerable class 625, 45 Ha, Ha 1418.92 prone, somewhat prone to 4807, 52 Ha, safe 1325, 57 Ha, very safe and 1157.54 ha with a total area of 9334.46 Ha. The spread of inundation rob Semarang region in 2011 is amounted to 1538.8 hectares. The North Region of Semarang is the most affected by tidal inundation, up to 508.28 hectares are affected. The second largest is at Genuk District with a total area of 377.68 hectares puddle. Extensive tidal inundation of 257.20 hectares located in the District Tugu furthermore, tidal inundation area of 237.19 hectares located in the District of West Semarang. The rest are spread in Semarang District Central, South and Gayamsari Semarang.
Laju Pertumbuhan Spesifik Tukik Penyu Lekang (Lepidochelys olivacea) dengan Pemberian Pakan Buatan Yang Berbeda di Turtle Conservation And Education Center, Bali Suraeda, Ria Yulianti; Sunaryo, Sunaryo; Kushartono, Edi Wibowo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.253 KB) | DOI: 10.14710/jmr.v7i3.25908

Abstract

ABSTRAK : Penyu laut merupakan hewan yang menghabiskan hampir seluruh hidupnya di bawah permukaan laut. Penyu laut dikategorikan hewan yang terancam punah. Jenis Penyu Lekang (Lepidochelys olivacea) adalah organisme laut yang tergolong dalam kategori terancam punah. Salah satu upaya untuk melestarikan populasi penyu adalah dengan melakukan pelepasan tukik. Namun keberhasilan setelah pelepasan tukik pada umumnya tidak pernah diketahui. Oleh karena itu, perlu adanya usaha untuk mempersiapkan tukik sebelum dilepas ke laut, sehingga membantu tingkat kelangsungan hidup tinggi. Aspek yang sampai saat ini belum diketahui adalah kebutuhan nutrisi yang tepat untuk menunjang pertumbuhan tukik. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian pakan buatan yang berbeda terhadap laju pertumbuhan panjang karapas, lebar karapas, dan bobot pada tukik Penyu Lekang. Penelitian ini dilakukan pada bulan Januari 2016 di Turtle Conservation and Education Center, Bali. Metode penelitian yang digunakan adalah metode eksperimental dengan menggunakan rancangan acak lengkap (RAL) 3 perlakuan dan 3 kali ulangan. Perlakuan yang diberikan berupa perbedaan sumber bahan baku pakan yang berbeda pada tukik adalah A=tepung ikan 40%, B=tepung ikan 35%, dan C=tepung ikan 30%. Jumlah pakan yang diberikan sebesar 5% dari bobot tukik per hari. Pemberian pakan dilakukan 2 kali sehari pada waktu pagi jam 09.00 WITA dan sore hari jam 16.00 WITA. Pergantian air dilakukan setiap hari pada pagi hari jam 07.00 WITA. Hasil pemberian pakan buatan dengan jumlah tepung ikan yang berbeda memberikan pengaruh sangat nyata (p<0,01) terhadap laju pertumbuhan spesifik panjang karapas, lebar karapas, dan bobot tukik Penyu Lekang. Pakan buatan yang paling baik di antara perlakuan yang diterapkan dicapai oleh pakan buatan dengan kandungan tepung ikan 40%. Pakan buatan dengan kandungan tepung ikan 40% menghasilkan tingkat laju pertumbuhan spesifik panjang karapas 0,48%/hari, lebar karapas 0,56 %/hari, dan berat tukik 1,13 %/hari. ABSTRACT : A sea turtle is an animal that spends most of its life under the sea. Sea turtles also belongs to the category of extinct animals. Olive ridley sea turtle (Lepidochelys olivacea) is a marine organism belonging to the endangered category. One of the efforts to conserve the turtle population is to release the hatchlings. But the succeed after releasing the hatchlings is generally not recognized. Therefore, there is a need to prepare for the hatchlings before being released into the sea to help the survival rate improved. An aspect which is still unrecognized is the need to support proper nutrient for the hatchlings growth. This study aimed to determine different concentrations in artificial feed to the growth rate of hatchling turtles carapace length, carapace width, and weight. This study was conducted in January 2016 in Turtle Conservation and Education Center, Bali. The method used was an experimental method with completely randomized design three treatments and three replications. The treatment given in the form of different sources of raw materials of different feed to hatchlings is A = the flour fish 40%, B = the flour fish 35%, and C =the flour fish 30%. The weight of the feed given was 5% of the hatchlings weight. The feeding was done twice a day, at 09.00 a.m. and at 04.00 pm. The substitution of water was done every day at 07.00 pm. The analysis result of the artificial feed of flour different fishes exert very real (p<0,01) against growth rate long specific carapace, wide carapace and weights hatchlings olive ridley sea turtles. Artificial feed the best between those who applied reached by feed artificially with the flour fish 40 %. Feed artificially with the flour fish 40 % generate a level of growth rate long specific carapace 0,48 %/day, wide carapace 0,56 %/day and heavy hatchlings 1,13 %/day.  
Pengaruh Perbedaan Jenis Dan Konsentrasi Larutan Alkali Terhadap Kekuatan Gel Dan Viskositas Karaginan Kappaphycus alvarezii, Doty Romenda, Ardiawan Pandu; Pramesti, Rini; Susanto, Antonius Budi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.347 KB) | DOI: 10.14710/jmr.v2i1.2065

Abstract

Carrageenan is a seaweed sap extracted by water or alkali solution from certain species Rhodophyceae class (red algae). The raw materials are used in various food and non-food industrial. The process of making SRC performed by using alkali type strong base KOH and NaOH with 4%, 6% and 8% concentration. Analysis is measured gel strength and viscosity of each type and concentration. KOH alkali treatment values are 4, 6 and 8% of the gel strength is 192.00 ± 1.12 g/m²; 630.71 ± 10.32 g/m²; 385.85 ± 3.70 g/m². NaOH 4, 6 and 8% of the gel strength is 184,63 ± 4,48 g/m²; 321,26 ± 46,12 g/m²; 452,24 ± 125,45 g/m². KOH alkali treatment values are 4, 6 and 8% of the viscosity was 22.24 ± 0.20 cPs; 24.61 ± 0.3 cPs; 20.00 ± 0.15 cPs; NaOH 4, 6 and 8% of the viscosity is cPs 22.58 ± 0.26; 25.07 ± 0.17 cPs; 25.07 ± 0.17 cPs. Based on the results of the study the highest gel strength is at 6% KOH and highest viscosity at 6% NaOH.
Struktur Komunitas Fitoplankton Pada Daerah Pertambakan Di Desa Mangunharjo Kecamatan Tugu Kota Semarang Cahyanti, Susilo Dwi; Endrawati, Hadi; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.286 KB) | DOI: 10.14710/jmr.v3i4.11411

Abstract

Kerusakan vegetasi mangrove disekitar pantai di desa Mangunharjo, Kecamatan Tugu, Kota Semarang karena adanya limbah rumah tangga dan abrasi pantai di daerah pantai utara Pulau Jawa. Kerusakan ini menyebabkan perubahan kondisi lingkungan yang diperkirakan berdampak pada struktur komunitas fitoplankton di kawasan tersebut.Tujuan penelitian ini adalah untuk mengetahui, mengidentifikasi, dan menentukan indeks struktur komunitas fitoplankton di desa Mangunharjo, Kecamatan Tugu, Kota Semarang.Sampel fitoplankton sebanyak 36 botol diambil pada bulan Oktober – November 2012. Pengambilan sampel dilaksanakan di lapangan dengan mengambil sampel air. Pengumpulan data dilaksanakan di laboratorium dengan mengidentifikasi genus fitoplankton yang ditemukan dan menghitung jumlahnya.Data yang telah diidentifikasi menunjukkan sejumlah 26 genus fitoplankton telah ditemukan. Hasil yang telah didapatkan dari semua perhitungan indeks kelimpahan bernilai 1392.096 sel/l dengan indeks keanekaragaman termasuk kategori sedang, indeks keseragaman tinggi serta tidak ada spesies yang mendominasi
IDENTIFIKASI PIGMEN KAROTENOID PADA BAKTERI SIMBION RUMPUT LAUT Kappahycus alvarezii Sahara, Fera Nur Idawati; Radjasa, Ocky Karna; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.865 KB) | DOI: 10.14710/jmr.v2i3.3133

Abstract

Carotenoid is one of the most important pigments that have important roles for human health. Carotenoids are believed to improve the better immune responses, anticancer, antioxidant, provitamin A and are also used in the treatment of disease that are sensitive to light. Carotenoids are yellow pigments, orange to red pigments and usually found in vegetables and fruits, and are also found in animals, humans, fungi and bacteria. The aims of study were to analyze carotenoid pigments from bacterial symbionts from seaweed Kappaphycus alvarezii and to identify bacterial symbionts that produce carotenoid pigments. Pigment analysis was performed by a UV-VIS spectrophotometer and High Performance Liquid Chromatography (HPLC). Bacterial identification was performed based on biochemical tests. These results showed that from 12 bacterial symbionts isolated, there were 2 isolates that positively synthesize carotenoids pigments, ECJ K and ECJ OR bacteria. ECJ K bacterium contained of Violaxanthin and α-carotene pigments. While ECJ OR bacterium contained of Diadinoxanthin, Neoxanthin, γ-carotene, β-carotene and α-carotene pigments. Bacterial identification showed that ECJ K bacterium was Brevibacterium maris and ECJ OR bacterium was Micrococcus varians. This result showed that bacterial symbionts of seaweed Kappaphycus alvarezii contained various pigments including in carotenoid pigments.
Kajian Potensi Pengembangan Ekowisata Sebagai Upaya Konservasi Mangrove Di Desa Pasar Banggi, Kabupaten Rembang Joandani, Ghea Ken Joandani; Pribadi, Rudhi; Suryono, Chrisna Adhi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.242 KB) | DOI: 10.14710/jmr.v8i1.24337

Abstract

Kawasan mangrove di Desa Pasar Banggi ditetapkan sebagai salah satu kawasan strategis dari sudut kepentingan fungsi dan daya dukung lingkungan hidup. Ekosistem mangrove di Desa Pasar Banggi merupakan salah satu yang terbaik di wilayah Pantura Jawa Tengah, sebelum dilakukan upaya rehabilitasi kondisi hutan mangrove di Desa Pasar Banggi mengalami kerusakan. Mengingat pentingnya fungsi hutan mangrove, maka sudah selayaknya dilakukan penanganan yang serius untuk mengurangi efek dari kerusakan ekosistem mangrove di Rembang ini. Salah satu alternative pemanfaatan yang memungkinkan untuk menjaga keutuhan ekosistem mangrove tersebut adalah melalui kegiatan ekowisata. Tujuan dari penelitian ini adalah untuk mengkaji potensi ekowisata mangrove di Pasar Banggi dan memberikan rekomendasi serta strategi pengembangan ekowisata di Pasar Banggi, Rembang. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif. Metode pengumpulan data dengan menggunakan metode survei dalam bentuk data primer dan data sekunder. Data yang diperoleh dilakukan penentuan strategi pengembangan ekowisata mangrove dan analisis SWOT (Strength, Weakness, Opportunity, dan Threat). Hasil penelitian menunjukan bahwa faktor-faktor yang mempengaruhi pengembangan ekowisata mangrove di Desa Pasar Banggi adalah keragaman jenis mangrove, kualitas SDM dalam menangani wisatawan, ketersediaan SDA berkualitas untuk ekowisata dalam upaya konservasi, kebijakan dari pemerintah daerah terkait peraturan serta perundang-undangan tentang ekowisata hutan mangrove di Desa Pasar Banggi, kondisi sosial-ekonomi masyarakat, serta infrastruktur pendukung. Menurut analisi SWOT yang menjadi prioritas utama adalah: a)  Peningkatan pengembangan ekowisata mangrove dalam bidang promosi program ekowisata dan penguatan institusi sebagai informasi ilmu pengetahuan ekosistem mangrove (Skor:4,52) dan b) Peningkatan partisipasi stakeholder terhadap pengembangan ekowisata mangrove yang berkelanjutan untuk peningkatan pelayanan terhadap pengunjung (Skor:3,29). The mangrove area in Pasar Banggi Village  is designated as one of the strategic region, as the point of importance of function and living environmental support. Mangrove ecosystem in Pasar Banggi Village is the best one area in Pantura, Central Java. Actually, Pasar Banggi Village’s condition was suffered damage before any efforts of rehabilitation of mangrove forest. Regarding the importance of the function of mangrove forests, there is a must doing a serious action to reduce the damage effects to the mangrove’s ecosystem in Rembang. One of the utilization alternative that can be used to maintain the integrity of the mangrove ecosystem is through ecotourism activities. The purpose of this research is examining the potential of ecotourism in Pasar Banggi Village and giving recommendation with ecotourism development strategy. Method which is used in this research is explorative descriptive.The collecting data method using survey method in form of primary data and secondary data. Then take the decision about the mangrove ecotourism development strategy and SWOT (Strength, Weakness, Opportunity, and Threat) analysis, after the data were obtained. The research results shows that the factors that affects the mangrove ecotourism development in Pasar Banggi Village is kind of types of mangroves, human resources’ quality while dealing with tourists or visitors, the availability of qualified nature resources for ecotourism, in effort of conservation, a policy of regional government related regulations and law about mangrove forest ecotourism in Pasar Banggi Village, community’s socio-economic conditions, also supporting infrastructure. According to the SWOT analysis, the top concerning priority are: a) mangrove ecotourism raising development in the field of ecotourism program promotion and institution strengthening as the mangrove ecosystem knowledge information (Score: 4.52) and b) Raising stakeholders’ participation toward the sustainable mangrove ecotourism development for improving service toward visitors (Score: 3.29) 
Pengaruh Konsentrasi Abu Gosok dan Waktu Perendaman Air Terhadap Kandungan Nutrisi Tepung Buah Mangrove Avicenia marina Permadi, Yusup Bayu; Sedjati, Sri; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.627 KB) | DOI: 10.14710/jmr.v1i1.885

Abstract

Nowadays, there are not much knowledge of mangrove fruit. One of mangrove species which has been used as source of food is A.marina. There are toxins such tannin and HCN in mangrove fruit. They may inhibit food process of mangrove fruit. So, they must be removed. The material for removing the toxins is ash powder. This study used factorial pattern of Randomized Complete with split plot Design with 2 treatments and 3 replication,i.e: water immersion time (1,2,3 day) and ash powder concentration (5,10,15% unity). Data was analyzed by two-way anova using SPSS. The result indicated that boiling treatment with ash powder and water immersion had a significant effect ( P<0,05) toward content of carbohydrate, lipid, protein of Avicennia marina fruit flour. Boiling treatment with 15 % ash powder and 3 days immersion had best result toward content of protein and lipid of Avicennia marina flour, while boiling treatment with 5% ash powder and 2 days immersion had best result toward content of carbohydrates of Avicennia marina flour.
KAJIAN STRUKTUR DAN KOMPOSISI VEGETASI MANGROVE DI KAWASAN PESISIR DESA PASAR BANGGI, KABUPATEN REMBANG Saputro, Irawan; Pribadi, Rudhi; Pratikto, Ibnu
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.468 KB) | DOI: 10.14710/jmr.v2i4.3690

Abstract

The condition of an ecosystem mangrove in the Pasar Banggi appertain one of the best in northern coast in central java. Management mangrove ecosystem there begin since the 1960s with conduct rehabilitation especially independently by the community. This condition, is perceived as a good condition and could be a good example to be applied in other areas. The purpose of this study is to know about the structure and composition of mangrove vegetation in Coastal Pasar Banggi Village, Rembang District. Vegetation data taking based on purposive sampling method and every transect made sampling plot. Each tree (plot 10 m x 10 m) and sapling (subplot 5 m x 5 m) identified and measured on diameter at breast height (± 1.3 m). Seedling calculated the amount of each species and the percentage of cover on subplot 1 m x 1 m. The result of research in Pasar Banggi Village was found 11 mangrove species. Generally, tree mangrove in Pasar Banggi Village have the range of density 100 ind/ha – 2533 ind/ha which dominated by Rhizophora mucronata. The Index of diversity (H’) and Eveness (J’) of mangrove vegetation in Coastal Pasar Banggi Village, Rembang District, were in low category.
Hasil Kandungan Agar Ekstraksi Non-Alkali Gracilaria sp. yang Tumbuh di Lingkungan Berbeda Andiska, Prismabella Wilis; Susanto, AB; Pramesti, Rini
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (868.963 KB) | DOI: 10.14710/jmr.v8i4.24860

Abstract

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. 
Pengaruh Naungan Sarang terhadap Persentase Penetasan Telur Penyu Lekang (Lepidochelys olivacea) di Pantai Samas Bantul, Yogyakarta Rofiah, Amalia; Hartati, Retno; Wibowo, Edy
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (154.273 KB) | DOI: 10.14710/jmr.v1i2.2026

Abstract

The reduced population of sea turtles among other things caused by natural changes in the vicinity of the egg-laying habitat, theft of sea turtle eggs, the utilization of a body part sea turtles by human beings (as the utilization of carapace, meat, bones, and sea turtle eggs), and management of the conservation techniques are inadequate. Pantai Samas Bantul, Yogyakarta, one of the places that are often encountered of Olive Ridley turtle (Lepidochelys olivacea). The aim of this research is to find out the influence of a shade from the success of hatching the eggs of Olive Ridley turtle (Lepidochelys olivacea) in semi natural nest in Samas Beach. The research method used is an experimental method. Observations in the field carried out in June-August 2010. The research was done at the three nests. They are in natural nest, semi natural nest with the shade of zinc, and semi natural nest with the shade of tarpaulin. The results showed the temperature of the nest in the depth of thirty-eight centimeters at the semi natural nest with the shade of tarpaulin about 31,6-31,9 ºC, in the semi natural nest with the shade of zinc about 31,4-31,7 ºC, and in the natural nest is around 31,5-32,3 ºC. The highest moisture is in the natural nest around 6,6 %, while the lowest moisture is in the natural nest with the shade of zinc around 1,5-2,1%. Hatching succes in natural nest is 60 %, semi natural nest with the shade of tarpaulin about 24 %, in the semi natural nest with the shade of zinc about 21 %. The composition of the size of grains of sand in a natural or semi natural nest is dominated by medium-size. Based on the results of research can be concluded that the percentage of hatching the egg of Olive Ridley turtle in the semi natural nest with the shade of tarpaulin is higher than semi natural nest with the shade of zinc, while in the natural nest having the highest percentage of hatching.

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