scholarly journals Supperior Fishing Gear for Coral Reef Fishes in Western Seram Regency

2021 ◽  
Vol 14 (1) ◽  
pp. 54-64
Author(s):  
Agustinus Tupamahu ◽  
Haruna Haruna ◽  
Barbara G Hutubessy ◽  
Stany R Siahainenia ◽  
Albert Ch Nanlohy ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Species ◽  
Reef Fishes ◽  
Survey Method ◽  
Fishing Gear ◽  
Biological Aspect ◽  
Scoring Method ◽  
Fishing Gears ◽  
Coral Reef Ecosystems ◽  
Selection Of

Various fishing gears that are operated in the coral reef waters of Western Seram Regency have their own selectivity, capture various species of fish, and have an impact on the damage to coral reef ecosystems. This study aims to determine the leading reef fishing gears in Western Seram District. The survey method is through observations and interviews with fishermen who conduct fishing activities of coral species. Respondents are determined by propulsive sampling, the selection of superior fishing gear is done by the scoring method. The results showed that the fishing gear classified into the line fishing gear was superior to other fishing gear, where the bottom trolling were superior. The less favored coral fishing equipment especially from the biological aspect needs attention to improve the method and design of the fishing gear.

scholarly journals Fishing-gear restrictions and biomass gains for coral reef fishes in marine protected areas

2018 ◽  
Vol 32 (2) ◽  
pp. 401-410 ◽  
Author(s):  
Stuart J. Campbell ◽  
Graham J. Edgar ◽  
Rick D. Stuart-Smith ◽  
German Soler ◽  
Amanda E. Bates
Keyword(s):  
Coral Reef ◽  
Protected Areas ◽  
Marine Protected Areas ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Fishing Gear

scholarly journals Size-specific recolonization success by coral-dwelling damselfishes moderates resilience to habitat loss

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Morgan S. Pratchett ◽  
Vanessa Messmer ◽  
Shaun K. Wilson
Keyword(s):  
Coral Reef ◽  
Habitat Loss ◽  
Reef Fishes ◽  
Host Coral ◽  
Proximate Cause ◽  
Coral Colony ◽  
Colonization Success ◽  
Coral Reef Ecosystems ◽  
Pomacentrus Moluccensis ◽  
Dascyllus Aruanus

Abstract Increasing degradation of coral reef ecosystems and specifically, loss of corals is causing significant and widespread declines in the abundance of coral reef fishes, but the proximate cause(s) of these declines are largely unknown. Here, we examine specific responses to host coral mortality for three species of coral-dwelling damselfishes (Dascyllus aruanus, D. reticulatus, and Pomacentrus moluccensis), explicitly testing whether these fishes can successfully move and recolonize nearby coral hosts. Responses of fishes to localized coral loss was studied during population irruptions of coral feeding crown-of-thorns starfish, where starfish consumed 29 (34%) out of 85 coral colonies, of which 25 (86%) were occupied by coral-dwelling damselfishes. Damselfishes were not tagged or individually recognizable, but changes in the colonization of different coral hosts was assessed by carefully assessing the number and size of fishes on every available coral colony. Most damselfishes (> 90%) vacated dead coral hosts within 5 days, and either disappeared entirely (presumed dead) or relocated to nearby coral hosts. Displaced fishes only ever colonized corals already occupied by other coral-dwelling damselfishes (mostly conspecifics) and colonization success was strongly size-dependent. Despite movement of damselfishes to surviving corals, the local abundance of coral-dependent damselfishes declined in approximate accordance with the proportional loss of coral habitat. These results suggest that even if alternative coral hosts are locally abundant, there are significant biological constraints on movement of coral-dwelling damselfishes and recolonization of alternative coral habitats, such that localized persistence of habitat patches during moderate or patchy disturbances do not necessarily provide resilience against overall habitat loss.

scholarly journals Olfactory responses of coral-reef fishes to coral degradation and crown-of-thorns (Acanthaster planci)

2016 ◽  
Vol 67 (5) ◽  
pp. 605 ◽  
Author(s):  
Amy G. Coppock ◽  
Naomi M. Gardiner ◽  
Geoffrey P. Jones
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Chemical Cues ◽  
Fish Assemblages ◽  
Reef Fishes ◽  
Live Coral ◽  
Acanthaster Planci ◽  
Olfactory Responses ◽  
Olfactory Stimuli ◽  
Coral Reef Ecosystems

Coral degradation is a major threat towards the biodiversity of coral-reef ecosystems, either through the physical effects of environmental change, or biological agents such as crown-of-thorns (Acanthaster planci). Coral loss is leading to significant declines in reef-fish assemblages, particularly those dependent on live coral as settlement sites. Most reef fishes use olfactory stimuli at settlement; however, their ability to detect chemical stimuli from degraded corals or A. planci is unknown. Here, olfactory responses of juvenile reef fishes to the presence of stressed corals and A. planci were tested. Juveniles of eight common coral-associated species were subjected to a series of pair-wise choice tests, where the period of time spent in two differing water sources was noted. All species demonstrated a significant attraction towards healthy coral (≥76%), avoiding cues emitted by stressed coral colonies. When given the choice between a control water (untreated reef water) and water containing chemical cues from A. planci, most species elicited no response. Finally, when given the choice between chemical cues derived from feeding A. planci or the control, all species avoided A. planci (≥70%). Our results indicated that juvenile reef fish are capable of distinguishing the state of coral health, but not directly from disturbance agents.

Vertical limits of host infestation by gnathiid isopods (Isopoda: Gnathiidae) parasitic on Caribbean coral reef fishes

2020 ◽  
Vol 40 (6) ◽  
pp. 866-871 ◽  
Author(s):  
Matthew D Nicholson ◽  
Gina C Hendrick ◽  
Amber J Packard ◽  
Davis L Strobel ◽  
Clayton Vondriska ◽  
...  
Keyword(s):  
Coral Reef ◽  
Water Column ◽  
Reef Fishes ◽  
Fish Host ◽  
Benthic Habitat ◽  
Coral Reef Ecosystems ◽  
Caribbean Coral Reef ◽  
Host Detection ◽  
Host Fishes ◽  
Fish Hosts

Abstract Parasites play significant roles in the function of ecosystems and can make up a large proportion of overall biomass. Yet, fundamental aspects of their ecology are often understudied relative to other organisms. Gnathiid isopods are the primary ectoparasites of fishes in coral reef ecosystems. While some studies have investigated their host-detection capabilities, the means by which they seek hosts are largely unknown. Gnathiids are benthic and live on the bottom, and all collection efforts involving live hosts have thus far involved traps set at or near the reef substrate. We investigated the distance gnathiids will travel vertically in the water column to attach to a fish host. The majority of gnathiids collected were at or less than 1 m above the reef substrate, and gnathiids were collected in serially diminishing numbers at 2 and 3 m above it. No gnathiids were collected from any fish hosts set more than 3.5 m above the reef substrate. Results suggest that gnathiids will actively seek host fishes in situ and will travel further from their benthic habitat than previously known. By swimming into the water column, gnathiids can exploit larger, highly-mobile fishes, which can serve as a major source of dispersal.

scholarly journals Dampak Snorkeling Terhadap Persen Tutupan Terumbu Karang Di Pulau Gili Labak Sumenep Madura

2021 ◽  
Vol 10 (2) ◽  
pp. 151-161
Author(s):  
Insafitri Insafitri ◽  
Eka Nurahemma Ning Asih ◽  
Wahyu Andy Nugraha
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Species ◽  
Coral Cover ◽  
Observation Time ◽  
Live Coral ◽  
Marine Tourism ◽  
Coral Reef Ecosystems ◽  
Potential Impact ◽  
The Impact

Wisata snorkeling terumbu karang di perairan pulau Gili Labak merupakan salah satu sektor wisata bahari yang sedang dikembangkan oleh pemerintah kebupaten Sumenep Madura sejak tahun 2014 hingga saat ini. Peningkatan jumlah wisatawan yang terjadi pada beberapa tahun terakhir dapat menimbulkan resiko tekanan dan kerusakan ekosistem terumbu karang di area snorkeling secara berkala. Penelitian ini bertujuan untuk mengetahui dampak kegiatan wisatawan sebelum, selama dan sesudah snorkeling terhadap ekosistem terumbu karang yang dikaji dengan mengetahui jenis karang yang mendominasi, status persentase tutupan terumbu karang serta potensi Dampak Wisata Bahari (DWB) snorkeling di lokasi wisata snorkeling pulau Gili Labak Sumenep. Persentase penutupan lifeform karang pulau Gili Labak khususnya di area snorkelling didominasi oleh karang hidup sebanyak 74% dan unsur abiotik sebesar 22%. Jenis karang yang mendominasi pulau Gili Labak adalah Acropora Branching sebesar 19,88% dan Coral Foliose sebesar 10,25%. Selama waktu 6 minggu pengamatan terjadi penurunan total karang sebesar 0,64% yang termasuk kategori rusak ringan, dimana sebagian besar kerusakan terjadi pada karang dengan bentuk pertumbahan branching misalnya Acropora Submassive dan Coral Submassive. Penurunan persen tutupan karang yang tinggi terjadi setelah kegiatan snorkeling (after) yang dilakukan oleh wisatawan. Analisa potensi Dampak Wisata Bahari (DWB) snorkeling pada terumbu karang di perairan Gili Labak selama 6 minggu pengamatan masuk dalam kategori rendah yaitu berkisar 0,052% hingga 0,085%. Faktor penyebab kecilnya nilai presentase Dampak Wisata Bahari (DWB) ini diduga karena waktu pengamatan cenderung pendek dan jenis karang yang mendominasi yaitu Acropora. Acropora memiliki kemampuan regenerasi lebih cepat dibandingkan jenis lainnya.  The snorkeling activity around coral reefs in the waters of Gili Labak is one of the marine tourism sectors that is being developed by the Sumenep Madura district government since 2014. Increasing number of tourists that occurs in recent years pose a risk of pressure and damage to coral reef ecosystems in the snorkeling area. This study aims to determine the impact of tourist activities before, during and after snorkeling on coral reef ecosystems that are studied by knowing the type of dominated coral, the percentage status of coral cover and the potential Impact of snorkeling at the snorkeling sites of the island of Gili Labak Sumenep. The percentage of coral cover in the island of Gili Labak especially in the snorkelling area is dominated by live coral ( 74%) and abiotic elements by 22%. Coral species that dominate the island of Gili Labak are Acropora Branching at 19.88% and Coral Foliose at 10.25%. During the 6-week observation there was a decrease in live coral cover by 0.64% which was categorized as minor damage, most of the damage occurred to branching   Acropora, sub-massive Acropora and Coral Sub-massive. The high percent decrease in coral cover occurred after snorkeling conducted by tourists. Analysis of the potential impact of snorkeling on coral reefs in the waters of Gili Labak for 6 weeks of observation is in the low category, ranging from 0.052% to 0.085%. The factor causing the small impact of Marine Tourism is presumably because the observation time tends to be short and the dominant coral species is Acropora. Acropora has the ability to regenerate faster than other types.

scholarly journals A biodiversity assessment of hard corals in dive spots within Dampier Straits Marine Protected Area in Raja Ampat, West Papua, Indonesia

2019 ◽  
Vol 20 (4) ◽  
pp. 1198-1207
Author(s):  
YUANIKE YUANIKE ◽  
FREDINAN YULIANDA ◽  
DIETRIECH G BENGEN ◽  
ROKHMIN DAHURI ◽  
JEMMY SOUHOKA
Keyword(s):  
Coral Reef ◽  
Protected Area ◽  
Coral Species ◽  
Marine Protected Area ◽  
Good Condition ◽  
Marine Biota ◽  
Biodiversity Assessment ◽  
Hard Coral ◽  
West Papua ◽  
Coral Reef Ecosystems

Abstract. Yuanike, Yulianda F, Bengen DG, Dahuri R, Souhoka J. 2019. A biodiversity assessment of hard corals in dive spots within Dampier Straits Marine Protected Area in Raja Ampat, West Papua, Indonesia. Biodiversitas 20: 1198-1207. Hard coral dominates coral reef ecosystems and has important functions and interactions in communities of marine biota. The structure and diversity of hard coral communities is very important to quantify, especially for the management of coral reef ecosystems. The purpose of this research is to identify the diversity of hard coral types, and quantify the condition of hard coral and their distributions in 10 marine stations in Dampier Straits Marine Protected Areas, Raja Ampat. The research method used was line intercept transects measured at two depths, 3 m and 6 m. The results showed there were 141 hard coral species included in 16 families. The percentage live cover of hard coral was in good conditions with an overall average coverage value of 64,24%. The biodiversity index (H) ranged from 0,84-1,23, the evenness index of species ranged from 0,73-0,94, and the species dominance index ranged from 0,05-0,25, indicating a high biodiversity and a lack of dominance by a single species. Although cover was slightly higher at 3m depth, diversity was slightly higher at 6m depth. In general, the 10 research stations in Dampier Straits has hard coral in good condition and the diversity of hard coral species is very productive and has stable growth compared with other sites in Indonesia.

scholarly journals Composition of coral species and benthic organism at Tiaka Oilfield, Tolo Bay, Central Sulawesi

2020 ◽  
Vol 1 (1) ◽  
pp. 22-28
Author(s):  
Kasim Mansyur ◽  
Achmad Rizal ◽  
Musayyadah Tis'in ◽  
Muh Saleh Nurdin ◽  
Nuke Susanti
Keyword(s):  
Coral Reef ◽  
Coral Species ◽  
Oil Field ◽  
Benthic Organism ◽  
Benthic Organisms ◽  
Benthic Species ◽  
Visual Census ◽  
Coral Reef Ecosystems ◽  
Central Sulawesi ◽  
Line Intercept

This research aims to find out the composition of the coral and benthic organisms at Tiaka Oilfield. This study was conducted in July 2015. Monitoring of coral and benthic organisms used line intercept transect and visual census method. The research results indicated that 16 coral species were consisting of 6 genera. Coral species dominated by the genus Acropora. Benthic organisms that live in symbiosis with coral reef ecosystems in the Tiaka Oil Field were found 11 benthic species consisting of 54 species

Diet of pre-settlement larvae of coral-reef fishes: selection of prey types and sizes

2009 ◽  
Vol 75 (3) ◽  
pp. 707-715 ◽  
Author(s):  
L. Carassou ◽  
R. Le borgne ◽  
D. Ponton
Keyword(s):  
Coral Reef ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Selection Of

Supplemental Information. Condition of Coral Reef Ecosystems in Central-Southern Quintana Roo, Mexico (Part 3: Juvenile Reef Fishes)

2003 ◽  
Vol 496 (33) ◽  
pp. 598-610 ◽  
Author(s):  
Carlos Gonzalez-Salas ◽  
Enrique Nunez-Lara ◽  
Miguel A. Ruiz-Zarate ◽  
Roberto C. Hernandez-Landa ◽  
Ernesto J. Arias-Gonzalez
Keyword(s):  
Coral Reef ◽  
Reef Fishes ◽  
Quintana Roo ◽  
Coral Reef Ecosystems

scholarly journals Kajian Kondisi dan Nilai Ekonomi Manfaat Ekosistem Terumbu Karang di Pantai Wediombo, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta

2016 ◽  
Vol 14 (2) ◽  
pp. 82
Author(s):  
Heriawan Maulana ◽  
Sutrisno Anggoro ◽  
Bambang Yulianto
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Common Property ◽  
Economic Valuation ◽  
Economic Value ◽  
Survey Method ◽  
Economic Losses ◽  
Percent Cover ◽  
Coral Reef Ecosystems ◽  
Line Intercept

ABSTRAKPerairan Wediombo Kabupaten Gunung Kidul yang telah ditetapkan sebagai Pencadangan Kawasan Konservasi Perairan Daerah pada tahun 2013. Pemanfaatan wilayah Pantai Wediombo oleh masyarakat sebagai lokasi pendaratan ikan dan pariwisata mengakibatkan peningkatan tekanan terhadap ekosistem perairan khususnya terumbu karang. Sebagai common property, kerusakan ekosistem terumbu karang tidak dirasakan sebagai kerugian ekonomi sehingga eksploitasi dari manfaat ekosistem terumbu karang menjadi tidak terkendali. Pengelolaan Pantai Wediombo menjadi tantangan bagi stakeholder untuk dapat mengoptimalkan pemanfaatan jasa lingkungan bagi kesejahteraan masyarakat. Salah satu komponen upaya pengelolaannya yaitu dengan melakukan pemantauan kondisi terumbu karang di Pantai Wediombo. Valuasi ekonomi ekosistem termbu karang merupakan instrumen untuk menilai produk dan jasa yang dihasilkan oleh ekosistem terumbu karang. Tujuan dari penelitian ini adalah untuk mengetahui kondisi ekosistem terumbu karang yang diwakili oleh persen tutupan terumbu karang dan nilai manfaat ekosistem terumbu karang yang diwakili oleh produk perikanan yang dihasilkan dari ekosistem terumbu karang di Pantai Wediombo. Metode yang digunakan adalah metode survei. Metode pengumpulan data kondisi terumbu karang mengacu pada metode Line Intercept Transect (LIT). sedangkan nilai ekonomi manfaat ekosistem terumbu karang dihitung menggunakan metode Effect on Productivity. Pada penelitian diperoleh hasil prosentase tutupan terumbu karang di Pantai Wediombo sebesar 25,29% dengan status kondisi rusak sedang. nilai ekonomi aktual ekosistem terumbu karang di Pantai Wediombo sebesar Rp. 634.553.504,-, sedangkan nilai manfaat sekarang dari ekosistem terumbu karang di Pantai Wediombo sebesar Rp. 20.304.872,-.Kata kunci: Ekosistem Terumbu Karang, Valuasi Ekonomi, Pantai Wediombo ABSTRACTBodies Wediombo Gunung Kidul regency which has been designated as a Local Backup Water Conservation Area in 2013. Utilization Wediombo Turkish territory by the public as a fish landing site and tourism resulted in increased pressure on aquatic ecosystems, especially coral reefs. As common property, damage to coral reefs is not perceived as economic losses so that the exploitation of the benefits of coral reef ecosystems had become unmanageable. Wediombo Coastal management is a challenge for stakeholders to be able to optimize the use of environmental services for the welfare of society. One component management efforts is by monitoring the condition of coral reefs in Wediombo Beach. Economic valuation of coral ecosystems termbu is an instrument to assess the products and services produced by a coral reef ecosystems. The purpose of this study was to determine the condition of coral reef ecosystems are represented by percent cover of coral reefs and coral reef ecosystems benefit value represented by the fishery products produced from coral reef ecosystems Wediombo Beach. The method used is a survey method. Methods of data collection coral reef condition refers to a method Line Intercept Transect (LIT). while the economic value of coral reef ecosystem benefits are calculated using methods Effect on Productivity. In the research results the percentage of coral reef cover in Turkish Wediombo of 25.29% with a damaged condition status. the true economic value of coral reef ecosystems Wediombo Coast of Rp. 634 553 504, -, while the value of current benefits of coral reef ecosystems Wediombo Coast of Rp. 20,304,872, -.Keywords:  Coral Reef Ecosystems, Economic Valuation, Turkish WediomboCara sitasi: Maulana, H., Anggoro, S., Yulianto, B. (2016). Kajian Kondisi dan Nilai Ekonomi Manfaat Ekosistem Terumbu Karang di Pantai Wediombo, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta. Jurnal Ilmu Lingkungan,14(2),82-87, doi:10.14710/jil.14.2.82-87

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