scholarly journals PENGUKURAN KEPADATAN IKAN TERUMBU SECARA EX SITU DENGAN METODE AKUSTIK

2019 ◽  
Vol 4 (1) ◽  
pp. 80-91
Author(s):  
Deddy Bakhtiar ◽  
Indra Jaya ◽  
Henry M Manik ◽  
Hawis H Madduppa
Keyword(s):  
Reef Fish ◽  
Acoustic Method ◽  
Ex Situ ◽  
Fish Density ◽  
Acoustic Backscattering ◽  
Acoustic Methods ◽  
Backscattering Strength ◽  
Coral Fish ◽  
Relationship Of ◽  
The Relationship

Pendugaan kelimpahan ikan terumbu secara akustik masih jarang dilakukan karena tingginya keanekaragaman jenis dalam suatu agregasi sehingga sulit membedakan nilai hambur balik akustik tiap jenis ikan. Oleh karena itu penelitian ini dilakukan dengan tujuan menganalisis hubungan kepadatan ikan Abudefduf saxatilis, Scolopsis lineatus dan Chaetodon trifasciatus terhadap perubahan nilai volume backscattering strength (Sv) kemudian menganalisis tingkat kesesuaian pendugaan kepadatan ikan secara akustik dengan kepadatan ikan sebenarnya melalui pengukuran secara ex situ. Metode yang digunakan adalah metode kurungan untuk pengukuran akustik secara ex situ. Alat yang digunakan dalam pengukuran akustik adalah Echosounder Simrad EK-15 frekuensi 200 kHz. Hasil penelitian menunjukkan nilai hambur balik akustik ketiga ikan terumbu memiliki hubungan yang sangat tinggi dengan kepadatan ikan. Peningkatan kepadatan ikan ikan terumbu akan meningkatkan nilai hambur balik akustik secara linier. Pendugaan kepadatan ikan secara akustik menunjukkan bahwa ikan Abudefduf saxatilis dan ikan Scolopsis lineatus menghasilkan dugaan kepadatan ikan yang sama secara statistik dengan kepadatan ikan yang sebenarnya, sedangkan ikan Chaetodon trifasciatus menghasilkan dugaan kepadatan ikan yang berbeda dan cenderung lebih kecil dari kepadatan ikan yang sebenarnya.MEASUREMENT OF REEF FISH DENSITY USING EX SITU ACOUSTIC METHODS. Estimation of reef fish abundance using acoustic method is still rarely done. High diversity of species in an aggregation impacts on the difficult to distinguish the backscatter value for each species. Therefore, this research was proposed to analyze the relationship of fish density of Abudefduf saxatilis, Scolopsis lineatus and Chaetodon trifasciatus for the changing of volume backscattering strength value, then to analyze the conformity of estimate coral fish density comparing with actual reef fish density through ex situ acoustical measurements. Cage method was used in this research for ex situ acoustical measurement using Echosounder Simirad EK-15 200 kHz. The result showed that the acoustic backscattering value of three species had a high relationship with fish density. The density of Abudefduf saxatilis and Scolopsis Lineatus were statistically similar to the actual fish density, while the density of Chaetodon trifasciatus was different and tend smaller than the actual fish density.

Seed Longevity and Germination Behaviour in Eugenia roxburghii

2021 ◽  
Vol 27 (3) ◽  
pp. 167-171
Author(s):  
Shareef Muhammed ◽  
Chitra Rajeswary ◽  
Anil Chandran
Keyword(s):  
Storage Temperature ◽  
Seed Viability ◽  
Seed Longevity ◽  
Ex Situ ◽  
Hermetic Storage ◽  
Germination Behaviour ◽  
Garden Plant ◽  
Relationship Of ◽  
The Relationship ◽  
And Storage

Eugenia roxburghii is an evergreen graceful shrub with a tremendous potential as garden plant. As a part of ex-situ conservation and popularization of the species, seed longevity was studied by understanding the relationship of seed viability with respect to different moisture contents and storage temperature. Seeds are recognized as recalcitrant, being desiccation as well as chilling sensitive. During hermetic storage, seeds stored at 300C/70%RH retained viability for about 5 months and 4 months in 200C/20% RH. Seeds can be best stored for five months in laboratory conditions.

Seed storage and germination studies of Garcinia talbotii Raizada ex Santapau seeds - an endemic tree from Western Ghats of India

2016 ◽  
Vol 23 (2) ◽  
pp. 73-78
Author(s):  
T. Sabu ◽  
P.S. Shameer ◽  
Chitra Rajeswary ◽  
N. Mohanan ◽  
C. Anilkumar
Keyword(s):  
Ex Situ Conservation ◽  
Storage Temperature ◽  
Seed Viability ◽  
Seed Storage ◽  
Ex Situ ◽  
Hermetic Storage ◽  
Western Ghats Of India ◽  
Relationship Of ◽  
The Relationship ◽  
And Storage

Seeds of Garcinia talbotii remained viable hardly for two weeks in open room conditions. As part of ex-situ conservation of Garcinia talbotii, seeds longevity was studied since seeds are the main propagule. For this, the relationship of seed viability with respect to different moisture content and storage temperature were analyzed. Seed storage behaviour is also investigated. Being recalcitrant, seeds are desiccation sensitive as well as chilling sensitive. During hermetic storage of seeds at 300C /70 % RH seeds retained viability about 6 months.

scholarly journals Coral Reef Fish and Plankton Diversity toward Coral Reef Coverage in Panjang Island of Anak Krakatoa Mountain

2019 ◽  
Vol 6 (1) ◽  
pp. 45-49
Author(s):  
Gita Puspitasari ◽  
Endang Linirin Widiastuti ◽  
Henni Wijayanti ◽  
Tugiyono Tugiyono
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Marine Ecosystem ◽  
Visual Census ◽  
Underwater Visual Census ◽  
Plankton Diversity ◽  
Relationship Of ◽  
The Relationship ◽  
Line Intercept

The coral reef is part of the marine ecosystem that important because of its role as a source of life, especially for marine variety creatures. This study aims to determine the relationship of the diversity of reef fish and plankton to coral reef cover on the Panjang Island of Anak Krakatoa Mount, Lampung. Line Intercept Transect used for retrieval of coral reef data and the Underwater Visual Census method for collecting coral reef fish data. Diversity and dominance index are utilized to analyze correlations between them. A good coral reef is obtained at point 2 (5 meters in depth) while at other points the condition of the coral reef is classified as moderate. The highest number of fish is found at point 1 (5 meters in depth) with 56 individuals. The highest plankton diversity is 3.04 Index whereas located at point 2 (0 meters in depth). They have a positive correlation (0.955-coral reef coverage with fishes, 0.916-diversity of reef fish and coral reefs, 0.833-diversity of reef fish with plankton) upon their relationship.

The relationship of reef fish densities to the proximity of mangrove and seagrass nurseries

2004 ◽  
Vol 60 (1) ◽  
pp. 37-48 ◽  
Author(s):  
M. Dorenbosch ◽  
M.C. van Riel ◽  
I. Nagelkerken ◽  
G. van der Velde
Keyword(s):  
Reef Fish ◽  
Relationship Of ◽  
The Relationship

scholarly journals Ecological Analysis of Some Azerbaijan Phanerophytes in ex situ Conditions

2022 ◽  
Vol 8 (1) ◽  
pp. 31-42
Author(s):  
A. Ahmedova
Keyword(s):  
Abiotic Factors ◽  
Ex Situ ◽  
Ecological Analysis ◽  
Resistant Species ◽  
Cultural Conditions ◽  
Relationship Of ◽  
The Relationship ◽  
Temperature Water

Analyzes of the relationship of 115 species of phanerophytes used in cultural conditions (Azerbaijan) against some abiotic factors (light, temperature, water, wind, etc.) have been presented in the paper. 2 species of these taxa are hygrophytes, 56 species are mesophytes, 23 species are xerophytes, 9 species are mesoskerophytes and 25 species are xeromesophytes have been determined depending from the relationship with water according to the results of analyzes. 100 light-loving species, 15 shade-loving species, 97 wind-resistant species and 18 wind-resistant species were found as a result of the study.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Studies on Leukemogenic and Sarcomagenic Viruses

1970 ◽  
Vol 28 ◽  
pp. 156-157
Author(s):  
Leon Dmochowski
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Morphological Properties ◽  
Mode Of Development ◽  
Relationship Of ◽  
The Relationship

Electron microscopy has proved to be an invaluable discipline in studies on the relationship of viruses to the origin of leukemia, sarcoma, and other types of tumors in animals and man. The successful cell-free transmission of leukemia and sarcoma in mice, rats, hamsters, and cats, interpreted as due to a virus or viruses, was proved to be due to a virus on the basis of electron microscope studies. These studies demonstrated that all the types of neoplasia in animals of the species examined are produced by a virus of certain characteristic morphological properties similar, if not identical, in the mode of development in all types of neoplasia in animals, as shown in Fig. 1.

The relationship of IGE receptor topography to signaling activity in RBL-2H3 mast cells

1991 ◽  
Vol 49 ◽  
pp. 236-237
Author(s):  
J.R. Pfeiffer ◽  
J.C. Seagrave ◽  
C. Wofsy ◽  
J.M. Oliver
Keyword(s):  
Mast Cells ◽  
Protein A ◽  
Scattered Electron ◽  
Ige Receptor ◽  
Receptor Complexes ◽  
Ige Binding ◽  
Electron Imaging ◽  
Small Clusters ◽  
Relationship Of ◽  
The Relationship

In RBL-2H3 rat leukemic mast cells, crosslinking IgE-receptor complexes with anti-IgE antibody leads to degranulation. Receptor crosslinking also stimulates the redistribution of receptors on the cell surface, a process that can be observed by labeling the anti-IgE with 15 nm protein A-gold particles as described in Stump et al. (1989), followed by back-scattered electron imaging (BEI) in the scanning electron microscope. We report that anti-IgE binding stimulates the redistribution of IgE-receptor complexes at 37“C from a dispersed topography (singlets and doublets; S/D) to distributions dominated sequentially by short chains, small clusters and large aggregates of crosslinked receptors. These patterns can be observed (Figure 1), quantified (Figure 2) and analyzed statistically. Cells incubated with 1 μg/ml anti-IgE, a concentration that stimulates maximum net secretion, redistribute receptors as far as chains and small clusters during a 15 min incubation period. At 3 and 10 μg/ml anti-IgE, net secretion is reduced and the majority of receptors redistribute rapidly into clusters and large aggregates.

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