scholarly journals Coral Fishes At Artificial Reef In Bunaken National Park Arakan, South Minahasa Regency

2017 ◽  
Vol 5 (2) ◽  
pp. 155
Author(s):  
Riezky H. S. Wuwumbene ◽  
Ari B. Rondonuwu ◽  
Victor N. R. Watung
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Diversity Index ◽  
Artificial Reef ◽  
Data Retrieval ◽  
Artificial Reefs ◽  
Visual Census ◽  
Reef Fish Species ◽  
The Village

Artificial reefs already placed in the coast of the village of Arakan, South Minahasa regency since June 2015. Artificial reef, that would be the location of research are concrete and iron, mostly be the medium of coral transplantation. The pupose of the research are (1). To know the species coral reef fish (2). To know the number of each species and the density of the coral reef fish (3). To know the structure of coral reef fish communities. Data retrieval be done use with Visual Census Method in the 51 squaremeter area (lenght = 8,5 m, width = 6 m). This research find 15 families with 29 coral reef fish species and 1341  individual. The diversity index of artificial reefs with moderate diversity index and relative abudance is found in species Dascyllus trimaculatus 34,731 %,  Plotosus lineatus 21,593 %, and Dascyllus reticulatus 21,174 %.Keywords: Artificial reef, Community Structure, Arakan. ABSTRAKTerumbu buatan sudah diletakan pada perairan desa Arakan Kabupaten Minahasa Selatan pada bulan Juni 2015. Terumbu buatan yang menjadi lokasi penelitian berjenis beton dan besi, model yang terbuat dari besi lebih banyak diarahkan sebagai media transplantasi karang. Penelitian ini bertujuan untuk (1) Mengetahui kekayaan spesies ikan karang (2) Mengetahui kelimpahan individu dan kepadatan relatif ikan karang (3) Mengetahui struktur komunitas ikan karang. Pegambilan data dilakukan menggunakan metode Sensus Visual dengan luas pengamatan pada terumbu buatan  seluas 51 m2 (panjang = 8,5 meter dan lebar = 6 meter). Penelitian ini menemukan 15 famili dengan 29 spesies ikan karang dan kelimpahan individu total 1341 individu. Indeks keanekaragaman di daerah terumbu buatan dengan nilai indeks keanegaraman yang sedang dengan indeks dominasi rendah dan kelimpahan relatif terdapat pada spesies Dascyllus trimaculatus dengan nilai 34,731 %, Plotosus lineatus dengan nilai 21,593 %, dan Dascyllus reticulatus dengan nilai 21,174 %.Kata Kunci : Terumbu Buatan, Struktur Komunitas, Arakan.

scholarly journals Enhancing reef fish diversity using artificial reef-building: A case study of coral reef rehabilitation on Nyamuk Island, Anambas Islands

2021 ◽  
Vol 944 (1) ◽  
pp. 012030
Author(s):  
B Prabowo ◽  
N Rikardi ◽  
M A Setiawan ◽  
P Santoso ◽  
Yonvitner ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Diversity Index ◽  
Artificial Reef ◽  
Fish Diversity ◽  
Underwater Visual Census ◽  
Target Fish ◽  
Reef Fish Species ◽  
Fish Group

Abstract CCMRS-IPB conducted coral reef rehabilitation at damaged coral reefs around Nyamuk Island. Those artificial reef buildings for rehabilitation gave shelter spaces for reef fish. This research aims to calculate the effect of coral reef-building, which enhances rugosity to the reef fish diversity around the rehabilitation sites. The study was conducted on Nyamuk Island in the Anambas Islands. Reef fish were sampled annually from 2014 to 2019 using the underwater visual census. The Diversity index and non-Metric Multidimensional Scaling were built to discover reef fish diversity, and reef fish species were affected the most. Yearly data shows an escalation number of reef fish abundance and richness at the end of 2019. The major reef fish group is found to have constant diversity throughout the year compared to other functional groups. The target reef fish group came to this rehabilitation ecosystem primarily attracted by nourishment availability. There is a shift in the reef fish diversity from the early year to the project end. Generally, major reef fish groups will be refuged first around the rehabilitation sites, especially territorial types. Target fish groups from herbivorous and carnivorous types will mostly come along after their food availability and location to get around.

Length‐weight relationships of 4 coral‐reef fish species encountered in Gilbert Islands coastal artisanal fisheries

2021 ◽  
Author(s):  
Sebastien Gislard ◽  
Pauline Bosserelle ◽  
George Shedrawi ◽  
Rateiti Vaimalie ◽  
Liliana Iotebatu ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Fish Species ◽  
Coral Reef Fish ◽  
Artisanal Fisheries ◽  
Reef Fish Species

scholarly journals DNA-based identification of predators of the corallivorous Crown-of-Thorns Starfish (Acanthaster cf. solaris) from fish faeces and gut contents

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Frederieke J. Kroon ◽  
Carine D. Lefèvre ◽  
Jason R. Doyle ◽  
Frances Patel ◽  
Grant Milton ◽  
...  
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Fish Species ◽  
Coral Reef Fish ◽  
Coral Cover ◽  
Fish Predation ◽  
Reef Fishes ◽  
Positive Control ◽  
Gut Contents ◽  
Reef Fish Species

Abstract The corallivorous Crown-of-Thorns Starfish (CoTS, Acanthaster spp.) has been linked with the widespread loss of scleractinian coral cover on Indo-Pacific reefs during periodic population outbreaks. Here, we re-examine CoTS consumption by coral reef fish species by using new DNA technologies to detect Pacific Crown-of-Thorns Starfish (Acanthaster cf. solaris) in fish faecal and gut content samples. CoTS DNA was detected in samples from 18 different coral reef fish species collected on reefs at various stages of CoTS outbreaks in the Great Barrier Reef Marine Park, nine of which had not been previously reported to feed on CoTS. A comprehensive set of negative and positive control samples confirmed that our collection, processing and analysis procedures were robust, although food web transfer of CoTS DNA cannot be ruled out for some fish species. Our results, combined with the (i) presence of CoTS spines in some samples, (ii) reported predation on CoTS gametes, larvae and settled individuals, and (iii) known diet information for fish species examined, strongly indicate that direct fish predation on CoTS may well be more common than is currently appreciated. We provide recommendations for specific management approaches to enhance predation on CoTS by coral reef fishes, and to support the mitigation of CoTS outbreaks and reverse declines in hard coral cover.

scholarly journals Comparison of visual census and high definition video transects for monitoring coral reef fish assemblages

2011 ◽  
Vol 107 (1-3) ◽  
pp. 84-93 ◽  
Author(s):  
Dominique Pelletier ◽  
Kévin Leleu ◽  
Gérard Mou-Tham ◽  
Nicolas Guillemot ◽  
Pascale Chabanet
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Assemblages ◽  
High Definition ◽  
Visual Census ◽  
High Definition Video

scholarly journals Assessment of Coral Reef Fish Stocks From the Nansha Islands, South China Sea, Using Length-Based Bayesian Biomass Estimation

2021 ◽  
Vol 7 ◽  
Author(s):  
Kui Zhang ◽  
Jun Zhang ◽  
Dengfu Shi ◽  
Zuozhi Chen
Keyword(s):  
Coral Reef ◽  
South China Sea ◽  
Reef Fish ◽  
Fish Species ◽  
South China ◽  
Coral Reef Fish ◽  
Nansha Islands ◽  
Fish Stocks ◽  
China Sea ◽  
Reef Fish Species

The South China Sea (SCS) is one of the world’s main centers for coral reef diversity, with more than one-third of all reef fish species being found in this area. Some indications of overfishing have appeared in typical coral reefs of the SCS, as fish diversities have declined and the average body lengths of dominant fish species have decreased. However, only few assessments of coral reef fish stocks have been conducted, due to insufficient available data. In this study, we applied a newly developed length-based Bayesian biomass (LBB) estimation method to assess 10 dominant coral reef fish species from three main reefs (Yongshu Reef, Zhubi Reef, and Meiji Reef) of the Nansha Islands, SCS. Simulations indicated the estimated parameters were not sensitive to sample sizes (more than 100) using the LBB method. Our results showed that the relative biomass levels (B/BMSY) of Cephalopholis spiloparaea, Cephalopholis urodeta, Lutjanus gibbus, Gnathodentex aureolineatus, Pentapodus caninus, and Cheilinus fasciatus were between 0.16 and 0.45, suggesting an overfishing status; the relative biomass levels of Epinephelus merra, and Parupeneus crassilabris were 0.98 and 1.1, respectively, indicating that they were fully exploited; and the relative biomass levels of Lutjanus kasmira and Melichthys vidua were 1.3 and 2.5, respectively, indicating the populations were in good conditions. The estimates of Lc/Lc_opt were less than one for seven stocks, suggesting that the stocks were suffering from growth overfishing. Therefore, we emphasize the need to reduce fishing mortality and increase the mesh size of the coral reef fishery in the Nansha Islands, to achieve a sustainable yield and biomass.

scholarly journals Coral Fishes in Coral Reef Waters of Sub District Maba, East Halmahera egency North Maluku Province

2014 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Ari Rondonuwu
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Diversity Index ◽  
Economic Value ◽  
Reef Fishes ◽  
Visual Census ◽  
Transect Line ◽  
Species Population ◽  
Target Fish ◽  
Species Richness And Abundance

This study aims to determine the distribution and abundance of reef fish in coral reef waters of Sub District Maba and was conducted at 10 stations. Data were collected by conducting visual census on the 50-meter transect line at 5 meters depth. In addition to revealing the number of species and abundance of coral fishes, data were analyzed to determine the diversity index (Shannon-Wiener). Based on field observations, most of the reef fishes  found in the Sub-district of Maba surrounding waters are being categorized to have less potential category (50%);  fair potential (41.67%); potential (8:33%); and  there is no population being classified in very potential category. Several locations have the potential reef fish condition were Jara-jara Cape, Gee Island, and Para-para Island.  Based on the existence of the target species population, in term of species richness and abundance, it is assumed that largely dominated by the target fish species that has low economic value. On the other hand target fish that has high economic value only consists of few species such as grouper, jacks, sweetlips, and snappers.   Keywords : coral fishes,  coral reef, sub district maba ABSTRAK Penelitian ini bertujuan untuk mengetahui distribusi dan kelimpahan ikan karang di perairan terumbu karang Kecamatan Maba. Penelitian dilakukan di 10 lokasi. Pengambilan data dilakukan dengan metode sensus visual pada transek garis sepanjang 50 meter, kedalaman 5 meter. Selain mengungkapkan jumlah spesies dan kelimpahan individu, analisis data diarahkan untuk mengetahui indeks keanekeragaman (Shannon-Wiener).  Berdasarkan hasil pengamatan, sebagian besar sumberdaya ikan karang di wilayah Kecamatan Maba, telah masuk dalam kategori kurang potensial (50 %); cukup potensial (41,67 %); potensial (8.33%); dan tidak ada yang tergolong dalam kategori sangat potensial.  Lokasi-lokasi yang memiliki kondisi ikan karang yang potensial,  Tanjung Jara-jara, Pulau Gee, dan Pulau  Para-para. Keberadaan populasi spesies target, baik kekayaan spesies maupun kelimpahan individu, ternyata sebagian besar didominasi oleh jenis ikan target yang bernilai ekonomi/pasar rendah.  Beberapa jenis ikan yang memiliki nilai ekonimis penting ditemukan  seperti, kerapu, Sweetlips (bibir manis), Bobara, dan kakap. Keywords : coral fishes,  coral reef, sub district maba

Sign in / Sign up

Export Citation Format

Share Document