scholarly journals Condition of Coral Fish in Tapanuli Tengah Waters

2018 ◽  
Vol 3 (2) ◽  
pp. 105
Author(s):  
Sasanti Retno Suharti ◽  
Isa Nagib Edrus
Keyword(s):  
Community Structure ◽  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Reef Fishes ◽  
The Other ◽  
Human Being ◽  
The World ◽  
Coral Fish ◽  
Complex Architecture

Coral reefs is a center for biodiversity in the world with a complex architecture and has an aesthetics value. It also offers beneficial for human being in many aspects such as economics, social and culture. Research was conducted in July 2016 and aim to understand community structure and biomass of coral reef fishes in Tapanuli Tengah waters. Result from all stations in Tapanuli Tengah waters showed that 49 species from seven families of economically reef fish i.e.  Acanthuridae, Serranidae, Haemulidae, Lutjanidae, Lehtrinidae, Siganidae and Scaridae were found. Density average of those seven families was 163 individual/350 m<sup>2</sup> or 4668 individual/ha with biomass average of 1.564 ton/ha. Moreover, biomass from other target fishes from nine families was accounted as 0.56 ton/ha. On the other hand, over all coralifore fish represented by Chaetodontidae was eight species from two genus, namely <em>Chaetodon</em> and <em>Heniochus </em>with four species. The density from family Chaetodotidae varies among station between 3-28 individual/350 m<sup>2</sup>

6. Reef fish and other major predators

2014 ◽  
Author(s):  
Charles Sheppard
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Feeding Ecology ◽  
Natural Habitat ◽  
Marine Species ◽  
Reef Fishes ◽  
Symbiotic Relationships ◽  
The Earth ◽  
Reef Communities

Healthy reefs provide a habitat for an immense number of fish that come in a variety of shapes, sizes, and colours. No other natural habitat in the ocean shows this diversity and abundance. About a quarter of all marine species may be found on coral reefs even though this habitat occupies only one or two per cent of the area of the earth. ‘Reef fish and other major predators’ describes the diverse feeding ecology of reef fishes; coral reef predators such as the colourful crown of thorns starfish, Acanthaster plancii; symbiotic relationships between different species of fish or with different invertebrates; and the dangers of overfishing in reef communities.

scholarly journals Struktur Komunitas Ikan Karang dan Tutupan Karang pada Terumbu Buatan Artificial Patch Reef (APR)

2020 ◽  
Vol 23 (3) ◽  
pp. 333-340
Author(s):  
Munasik Munasik ◽  
Aldion Adin Nugroho ◽  
Retno Hartati ◽  
Agus Sabdono ◽  
Sugiyanto Sugiyanto ◽  
...  
Keyword(s):  
Community Structure ◽  
Coral Reefs ◽  
Reef Fish ◽  
Coral Cover ◽  
Patch Reef ◽  
Habitat Type ◽  
Artificial Reef ◽  
Reef Fishes ◽  
Live Coral ◽  
Natural Coral

Artificial Patch Reef (APR) have been applied as a new method for Biodiversity Conservation Program at Panjang Island, Jepara since 2015. Previous study suggested that design and location of artificial reefs installation affected to abundance of reef fishes, associated with the artificial reef.  This study aims to investigated community structure of reef fishes associated to artificial patch reef comparing to reef fishes in nearby natural reefs. Assessment of coral reef condition on two habitats were conducted on July 2019, after 4 years deployment.  The results show that artificial patch reefs with a percentage of live coral cover are less than half of natural coral reefs, and have succeeded in increasing the abundance of reef fish with nearly the same density and community structure resembling reef fish in natural coral reefs. The similarity in community structure of the two habitats is probably due to the similarity in habitat type and morphology of the hard corals. The results indicate that Artificial Patch Reef (APR) reefs have increased the coral cover of Acropora branching and resulted in increased reef fish abundance which is compatible with reef fish communities associated with natural coral reefs around it. Aplikasi metode baru terumbu buatan Artificial patch Reef (APR) pada Program Konservasi Bioiversitas Pulau Panjang, Jepara telah dilakukan sejak 2015. Hasil studi menunjukkan bahwa pemilihan desain dan lokasi pemasangan terumbu buatan yang tepat akan meningkatkan kelimpahan ikan karang. Tujuan penelitian ini adalah untuk mengetahui keberhasilan penerapan terumbu buatan APR melalui kelimpahan ikan karang yang berasosiasi pada terumbu buatan dan terumbu karang alami di sekitarnya. Penilaian kondisi terumbu karang tersebut telah dilakukan pada Juli 2019 setelah 4 (empat) tahun pemasangan terumbu buatan. Hasil studi menunjukkan bahwa terumbu buatan dengan persentase tutupan karang hidup lebih kecil, separuhnya dari tutupan pada terumbu karang alami telah berhasil meningkatkan kelimpahan ikan karang dengan densitas hampir sama dan struktur komunitasnya menyerupai ikan karang yang berasosiasi dengan terumbu karang alami. Kesamaan struktur komunitas kedua habitat kemungkinan akibat kesamaan tipe habitat dan morfologi karang keras penyusunya. Hasil ini mengindikasikan bahwa terumbu buatan Artificial patch Reef (APR) telah meningkatkan tutupan karang bercabang Acropora dan berakibat terhadap meningkatnya kelimpahan ikan karang yang sesuai dengan komunitas ikan karang yang berasosiasi dengan terumbu karang alami di sekitarnya.

scholarly journals HUBUNGAN PERSENTASE TUTUPAN KARANG DENGAN KELIMPAHAN IKAN KARANG DI PULAU MENJANGAN KECIL, KEPULAUAN KARIMUNJAWA, KABUPATEN JEPARA,JAWA TENGAH (Relationship of Coral Cover Percentage with Reef Fishes Abundance in Menjangan Kecil Island, Karimunjawa Island, Jepara)

2018 ◽  
Vol 6 (4) ◽  
pp. 333-338
Author(s):  
Fahmi Fahmi ◽  
Supriharyono Supriharyono ◽  
Abdul Ghofar
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Coral Cover ◽  
Reef Fishes ◽  
Line Transect ◽  
Live Coral ◽  
East Side ◽  
Visual Census ◽  
West Side

Ekosistem terumbu karang merupakan kekayaan sumberdaya laut yang memiliki peranan penting dalam mendukung kehidupan berbagai organisme perairan. Salah satu organisme yang memiliki ketergantungan hidup pada terumbu karang adalah ikan karang. Hal ini dikarenakan ikan karang melalui fase hidup sebagian atau seluruhnya di terumbu karang, sehingga terumbu karang menjadi tempat tinggal, tempat mencari makan, tempat berlindung dan tempat berkembang biak.  Penelitian dilaksanakan pada bulan Mei 2017, dengan tujuan untuk mengetahui persentase tutupan karang hidup dan kelimpahan ikan. Serta hubungan persentase tutupan karang dengan kelimpahan ikan karang pada sisi Barat dan Timur Pulau Menjangan Kecil kedalaman 1 dan 3 meter. Metode yang digunakan adalah metode observasi lapangan, dengan metode sampling menggunakan transek garis (line transect) pada data karang dan visual census untuk data ikan sepanjang 25m. Hasil dari penelitian ini menunjukkan bahwa Persentase rata-rata tutupan karang yang diperoleh pada kedalaman 1 meter sisi Barat adalah 73,39%, sedangkan pada kedalaman 3 meter adalah 85,97%. Persentase tutupan karang pada kedalaman 1 meter sisi Timur adalah 63,73%, sedangkan pada kedalaman 3 meter adalah 77,61%. Secara keseluruhan kondisi terumbu karang masih tergolong baik. Kelimpahan rata-rata ikan pada sisi Barat kedalaman 1 meter adalah 70 individu/125 m2, sedangkan pada kedalaman 3 meter adalah 232 individu/125 m2. Kelimpahan ikan sisi Timur kedalaman 1 dan 3 meter masing-masing adalah 49 dan 138 individu/125 m2. Hasil perhitungan indeks korelasi secara keseluruhan menghasilkan nilai 0,8415 dengan koefesien determinasi sebesar 0,7081. Hal ini menunjukkan bahwa pola hubungan persentase tutupan karang dengan kelimpahan ikan karang kuat (signifikan) dan positif (searah). Coral reef ecosystem is a wealth of marine resources that have an important role in supporting the life of various aquatic organisms. One of the organisms that has a living dependence on coral reefs is reef fish. This is because coral fish through a partial or complete life phase on the coral reef, so that coral reefs become a place to live, a place to find food, shelter and breeding ground. The study was conducted in May 2017, with the objective of knowing the percentage of live coral cover and fish abundance. And the correlation of percentage of coral cover with abundance of reef fish on West and East side of Menjangan Kecil Island depth of 1 and 3 meters. The method used is field observation method, with sampling method using line transect on coral data and visual census for fish data along 25m. The results of this study indicate that the average percentage of coral cover obtained at a depth of 1 meter west side is 73.39%, while at a depth of 3 meters is 85.97%. The percentage of coral cover at depth of 1 meter East side is 63,73%, while at depth 3 meter is 77,61%. Overall the condition of coral reefs is still quite good. The average abundance of fish on the west side of 1 meter depth is 70 individuals / 125 m2, while at 3 meters depth is 232 individuals / 125 m2. The abundance of fish on Eastern side, depth of 1 and 3 meters respectively were 49 and 138 individu / 125 m2. Result of calculation of correlation index as a whole yield value 0,8415 with coefficient of determination equal to 0,7081. This shows that the pattern of correlation of percentage of coral cover with abundance of reef fish is strong (significant) and positive (unidirectional).

scholarly journals Condition of Coral Reefs and Reef Fishes in Dofa Village, Sula Islands Regency

2021 ◽  
Vol 5 (1) ◽  
pp. 431-436
Author(s):  
Alimuddin Alimuddin ◽  
Nurul Chayati ◽  
Tedy Murtejo ◽  
La Ode M. Gunawan Giu ◽  
Ria Fitri
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Current Velocity ◽  
Reef Fishes ◽  
Fish Diversity ◽  
Live Coral ◽  
Coral Reef Ecosystem ◽  
Coral Fish ◽  
Index Value ◽  
Reef Ecosystem

Coral reefs are unique among ocean associations or communities that are entirely formed by biological activity. This study aims to determine the condition of coral reefs and reef fishes in Dofa Village, West Mangoli District, Sula Islands, 2018. Collecting coral data used the Line Intercept Transect (LIT) method, while coral fish data collection used the visual census method. Water parameters measured are temperature, salinity, degree of acidity (pH), brightness and current velocity. Based on observations, the water temperature ranges from 29.33° C - 29.9° C. The salinity of the waters ranges from 29.67 ‰ - 34 ‰. The degree of acidity is 7.5 which supports the life of coral reef. The water brightness level is 65% - 100%. The current velocity ranges from 0.02 m / s to 0.05 m / s. The condition of the coral reef ecosystem based on the percentage of hard coral cover ranged from 21.02% - 33.7% with low to medium category. The coral mortality index at the study location was small where at station 1 it was 0.487, station 2 was 0.335 and station 3 was 0.205, meaning that there was no significant change for live coral reefs. The abundance of reef fishes ranged from 0.52 ind/m2 - 1.22 ind/m2 which was dominated by the Pomacentridae and Labridae families where the two families were groups of fish that used coral reefs as habitat for feeding ground. The index value of coral fish diversity in the coral reef ecosystem at all stations ranged from 0.58 to 3.60 where the diversity index value was in the low to medium category. The uniformity index is included in the medium category with values ​​ranging from 0.58 to 0.63 which illustrates that the difference in the number of individuals for each species is not too significant. The dominance index of reef fishes at the observation station is very small, ranging from 0.03 - 0.07 which indicates that the dominance of the species is very low, so that the condition of the reef fish community is relatively stable.

scholarly journals Coral reef fishes in the banks and rocky islands in the offshore waters of Binh Thuan province

2019 ◽  
Vol 19 (4A) ◽  
pp. 259-271
Author(s):  
Mai Xuan Dat
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Reef Fishes ◽  
Average Density ◽  
Coral Reef Fishes ◽  
South Central ◽  
Fish Group ◽  
Coast Of Vietnam

Binh Thuan province is located in the South Central Coast of Vietnam with favorable conditions for living coral reefs. The coral reefs were mainly investigated in coastal water areas and Phu Quy island, meanwhile other areas such as the banks and rocky islands seem to lack information. This study was conducted to evaluate the species composition and distribution of coral reef fish communities in the Royal Bishop banks and around rocky islands in Julia shoal in the offshore waters of Binh Thuan province in April 2019. A total of 151 species belonging to 86 genera and 33 families of coral reef fishes were recorded. Among them, 4 species for the first time recorded in Vietnam are Helcogramma striata (Hansen, 1986) (Tripterygiidae), Pseudanthias squamipinnis (Peters, 1855) (Serranidae), Bodianus bilunulatus (Lacepède, 1801) and Coris aygula (Lacepède, 1801) (Labridae). The total average density of coral reef fish in the offshore waters of Binh Thuan is quite high at 1,104.9 ± 617 individuals/250 m2, most of them are small sized fish and ornamental fish group, the large sized fish and target fish group accounts for a relatively low rate, but their density here is much higher compared to that in the coastal waters of Binh Thuan province. The comparative analysis also shows that sites in coral reef around rocky islands have species richness and density of coral reef fish higher than the bank area.

scholarly journals Colour thresholds in a coral reef fish

2016 ◽  
Vol 3 (9) ◽  
pp. 160399 ◽  
Author(s):  
C. M. Champ ◽  
M. Vorobyev ◽  
N. J. Marshall
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Colour Vision ◽  
Visible Spectrum ◽  
Reef Fishes ◽  
Colour Discrimination ◽  
Visual Model ◽  
The World ◽  
Different Parts ◽  
Receptor Noise

Coral reef fishes are among the most colourful animals in the world. Given the diversity of lifestyles and habitats on the reef, it is probable that in many instances coloration is a compromise between crypsis and communication. However, human observation of this coloration is biased by our primate visual system. Most animals have visual systems that are ‘tuned’ differently to humans; optimized for different parts of the visible spectrum. To understand reef fish colours, we need to reconstruct the appearance of colourful patterns and backgrounds as they are seen through the eyes of fish. Here, the coral reef associated triggerfish, Rhinecanthus aculeatus , was tested behaviourally to determine the limits of its colour vision. This is the first demonstration of behavioural colour discrimination thresholds in a coral reef species and is a critical step in our understanding of communication and speciation in this vibrant colourful habitat. Fish were trained to discriminate between a reward colour stimulus and series of non-reward colour stimuli and the discrimination thresholds were found to correspond well with predictions based on the receptor noise limited visual model and anatomy of the eye. Colour discrimination abilities of both reef fish and a variety of animals can therefore now be predicted using the parameters described here.

A Liberdade e a Justiça: horizontes para uma racionalidade socioambiental

2020 ◽  
Author(s):  
José Luis Sepúlveda Ferriz
Keyword(s):  
The Other ◽  
Human Being ◽  
Human Beings ◽  
Great Opportunity ◽  
The World ◽  
Authentic Development ◽  
Sense Of Justice

Freedom and Justice have always been challenged. Since the most remote times, and in the most varied circumstances of places and people, human beings have tried to clarify and put into practice these two controversial concepts. Freedom and Justice, in effect, are words, but also dreams, desires and practices that, not being imperfect, are less sublime and ambitious. Reflecting on them on the basis of an ethics of development and socioenvironmental sustainability is still a great challenge in our contemporaneity. This book is born from the need that we all have to reflect, understand what our role is in relation to the OTHER, understood as the other as Environment. Doing this from such disparate areas and at the same time as current as Economics, Philosophy and Ecology, is still a great opportunity to discuss complexity, transdisciplinarity and the inclusion of diverse themes, but which all converge in the Human Being and its relationship with the world. Endowing human beings with Freedom and a sense of Justice means RESPONSIBILITY. To be free and to want a better and fairer world is to endow our existence with meaning and meaning. Agency, autonomy, functioning, dignity, rights, are capacities that must be leveraged individually and collectively for authentic development to exist. Development as Freedom is a valid proposal for thinking about a socio-environmental rationality that interferes in the controversial relations between economics, ethics and the environment.

La transposition profane de l’Exode dans Moïse fiction de Gilles Rozier

2013 ◽  
pp. 174-183
Author(s):  
Piotr Sadkowski
Keyword(s):  
Present Article ◽  
Old Testament ◽  
The Other ◽  
Jewish Tradition ◽  
Human Being ◽  
The Novel ◽  
Jewish Origin ◽  
French Writer ◽  
The World ◽  
Jewish Writers

Throughout the centuries French and Francophone writers were relatively rarely inspired by the figure of Moses and the story of Exodus. However, since the second half of 20th c. the interest of the writers in this Old Testament story has been on the rise: by rewriting it they examine the question of identity dilemmas of contemporary men. One of the examples of this trend is Moïse Fiction, the 2001 novel by the French writer of Jewish origin, Gilles Rozier, analysed in the present article. The hypertextual techniques, which result in the proximisation of the figure of Moses to the reality of the contemporary reader, constitute literary profanation, but at the same time help place Rozier’s text in the Jewish tradition, in the spirit of talmudism understood as an exchange of views, commentaries, versions and additions related to the Torah. It is how the novel, a new “midrash”, avoids the simple antinomy of the concepts of the sacred and the profane. Rozier’s Moses, conscious of his complex identity, is simultaneously a Jew and an Egyptian, and faces, like many contemporary Jewish writers, language dilemmas, which constitute one of the major motifs analysed in the present article. Another key question is the ethics of the prophetism of the novelistic Moses, who seems to speak for contemporary people, doomed to in the world perceived as chaos unsupervised by an absolute being. Rozier’s agnostic Moses is a prophet not of God (who does not appear in the novel), but of humanism understood as the confrontation of a human being with the absurdity of his or her own finiteness, which produces compassion for the other, with whom the fate of a mortal is shared.

scholarly journals KONDISI IKAN KARANG FAMILI CHAETODONTIDAE DI DAERAH PERLINDUNGAN LAUT DESA BAHOI KECAMATAN LIKUPANG BARAT KABUPATEN MINAHASA UTARA

2015 ◽  
Vol 2 (3) ◽  
pp. 92
Author(s):  
Jacqline Laikun ◽  
Ari B Rondonuwu ◽  
Unstain N.W.J. Rembet
Keyword(s):  
Spatial Distribution ◽  
Coral Reef ◽  
Coral Reefs ◽  
Protected Areas ◽  
Reef Fish ◽  
Marine Protected Areas ◽  
Visual Census ◽  
Fish Family ◽  
Marine Life ◽  
Reef Condition

The coral reefs are a sundry of marine life. Which one is reef fish in family Chaetodontidae. This fish is  indicator of the coral reef condition. The aim from the research is : discover of spatial distribution of the reef fish family Chaetodontidae and find out of the intercourse of reef fish family Chaetodontidae with the coral reef presence based on growth of coral form. The research was do in the coral reef at Marine Protected Areas in Bahoi Village District of West Likupang North Minahasa Regency, on Tuesday, December 23rd, 2014. The research is using to do the surveying method. The data is collecting distribution of the fish Chaetodontidae (amount from species and individuals to using by technic visual census). The total of reef fish family Chaetodontidae those found in Marina Protected Areas in Bahoi Village is about 20 species, with total of the individuals at a depth of 3 meters and 10 meters is (56,66 and 57,33 individuals/150m2). Keywords : Coral reefs, Chaetodontidae, Bahoi   ABSTRAK Terumbu karang merupakan tempat berbagai macam biota laut. Salah satu Ikan karang adalah ikan famili Chaetodontidae. Ikan ini merupakan ikan indikator terumbu karang. Tujuan dari penelitian ini : mengetahui kelimpahan dari ikan karang famili Chaetodontidae. Penelitian ini dilakukan di Daerah Perlindungan Laut Desa Bahoi Kecamatan Likupang Barat Kabupaten Minahasa Utara, pada hari selasa, tanggal 23 Desember 2014. Penelitian ini menggunakan metode survey. Data yang dikumpulkan adalah kelimpahan ikan Chaetodontidae (Jumlah spesies dan individu dengan menggunakan teknik sensus visual). Jumlah ikan karang famili Chaetodontidae yang di temukan di Daerah Perlindungan Laut Desa Bahoi berjumlah 20 spesies, dengan jumlah individu pada kedalaman 3 meter dan 10 meter berjumlah (56,66 individu/150m2 dan 57,33/150m2 individu). Kata kunci : Terumbu karang, Chaetodontidae, Bahoi 1Bagian dari skripsi 2Mahasiswa Program Studi Manajemen Sumberdaya Perairan FPIK-UNSRAT 3Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

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