Impact of fear effect exerted by Pterois volitans on a coral reef ecosystem with parrotfish refuge and harvesting of both fishes

2021 ◽  
Author(s):  
Banamali Maji ◽  
Samares Pal
Keyword(s):  
Coral Reef ◽  
Coral Reef Ecosystem ◽  
Pterois Volitans ◽  
Fear Effect ◽  
Reef Ecosystem

scholarly journals Regional differences in an established population of invasive Indo-Pacific lionfish (Pterois volitans and P. miles) in south Florida

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5700
Author(s):  
David R. Bryan ◽  
Jeremiah Blondeau ◽  
Ashley Siana ◽  
Jerald S. Ault
Keyword(s):  
Coral Reef ◽  
Florida Keys ◽  
South Florida ◽  
Population Status ◽  
Coral Reef Ecosystem ◽  
The South ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Dry Tortugas ◽  
Reef Ecosystem

About nine years ago (circa 2009), Indo-Pacific lionfishes (Pterois volitans and P. miles) invaded the south Florida coral reef ecosystem. During the intervening period of time, there has been substantial research on their biology, life history, demography, and habitat preferences; however, little is known concerning their regional population status and trends in the region. Here, we use a large-scale fisheries independent reef fish visual survey to investigate lionfish population status among three south Florida regions: Dry Tortugas, Florida Keys, and southeast Florida. Density estimates (ind ha−1) have been relatively stable since 2012, and are lower than other areas reported in the western Atlantic and Caribbean Sea. Low, stable population densities in south Florida suggest there may be a natural mechanism for lionfish population control. In the Dry Tortugas, lionfish density in 2016 was significantly lower (0.6 ind ha−1 ± 0.15 SE) than the two other south Florida regions. The Dry Tortugas region has the highest percentage of marine protected areas, the lowest level of exploitation, and thus the highest densities of potential lionfish predators and competitors. In the Florida Keys and southeast Florida in 2016, lionfish densities were greater (5.4 ind ha−1 ± 1.0 SE and 9.0 ± 2.7 SE, respectively) than the Dry Tortugas. Fishing pressure on lionfish was higher in these two regions, but densities of several potential predators and competitors were substantially lower. Despite relatively low regional lionfish densities that can be attributed to some combination of fishing mortality and natural biocontrol, lionfish are still well established in the south Florida coral reef ecosystem, warranting continued concern.

THE COMPOSITION AND DISTRIBUTION OF BENTHIC FORAMINIFERA AT CORAL REEF ECOSYSTEM IN THOUSANDS ISLAND

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Lumban Nauli Lumban Toruan ◽  
Dedi Soedharma ◽  
Kresna Tri Dewi
Keyword(s):  
Coral Reef ◽  
Human Activities ◽  
Close Association ◽  
Mesh Size ◽  
Coral Reef Ecosystem ◽  
Composition Distribution ◽  
Benthic Foraminifers ◽  
High Nutrient ◽  
Binocular Microscope ◽  
Reef Ecosystem

Composition and distribution of foraminifers are affected by human activities and have close association with coral reef ecosystem. The aims of this research were to investigate the benthic foraminifers’ composition and distribution in sediment of coral reef ecosystem. Eleven stations of Karang Bongkok, Pramuka, and Onrust Island were observed in this study. The sediments were taken from surface substrate up to 2 cm under the substrate. Samples were washed on sieve with mesh size 0,063 mm, and then dried in oven with 50°C of temperature  for two hours. After separating from the sediment, the foraminifers were laid on foraminiferal slide and indentified using binocular microscope. The highest composition of symbiont-bearing foraminiferal assemblages which associated with reef ecosystem was in East Pramuka (78.17%) and the lowest was in South Onrust (21,83%). The opportunistic type had the highest composition in South Onrust (38.67%) and the lowest was in South Karang Bongkok. In west Pramuka had the highest composition of heterotrophic type (57.17%) and the lowest was in North Onrust (11.33%). Onrust Island was dominated by opportunistic type, indicating high nutrient. The highest amount of foraminifers’ taxa was found in Karang Bongkok with good coral reef coverage, while the lowest in Onrust facing with Jakarta Bay. Keywords: composition, distribution, benthic foraminifers, coral reef.

Measurement of the trophic level of fish in a coral reef ecosystem using stable isotopes

2013 ◽  
Vol 19 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Guohuan YANG ◽  
Xingli SUN ◽  
Xiuqiong HOU ◽  
Chunliang CHEN
Keyword(s):  
Stable Isotopes ◽  
Coral Reef ◽  
Trophic Level ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

Marine reserves, fisheries ban, and 20 years of positive change in a coral reef ecosystem

2021 ◽  
Author(s):  
Peter J. Mumby ◽  
Robert S. Steneck ◽  
George Roff ◽  
Valerie J. Paul
Keyword(s):  
Coral Reef ◽  
Marine Reserves ◽  
Positive Change ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

Integrity evaluation and dynamic simulation of Xisha coral reef ecosystem

2021 ◽  
Vol 41 (10) ◽  
Author(s):  
王耕，董瑞，周腾禹，徐惠民，丁德文 WANG Geng
Keyword(s):  
Coral Reef ◽  
Dynamic Simulation ◽  
Coral Reef Ecosystem ◽  
Reef Ecosystem

Terrestrial Nutrients and Dissolved Organic Matter Input to the Coral Reef Ecosystem via Submarine Springs

2021 ◽  
Author(s):  
Dini Adyasari ◽  
Hannelore Waska ◽  
Kirstin Daehnke ◽  
Till Oehler ◽  
Atas Pracoyo ◽  
...  
Keyword(s):  
Organic Matter ◽  
Coral Reef ◽  
Dissolved Organic Matter ◽  
Coral Reef Ecosystem ◽  
Submarine Springs ◽  
Reef Ecosystem ◽  
Organic Matter Input

scholarly journals CONDITION OF CORAL AND REEF FISH IN THE LOCATION OF FISH CATCHING USING DYNAMITE FISHING IN KAPOPOSANG WATER PARK AND THE SURROUNDING SEA

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Mahmudin Mahmudin ◽  
Chair Rani ◽  
Hamzah Hamzah
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Cover ◽  
Low Cost ◽  
Fish Abundance ◽  
Live Coral ◽  
Coral Reef Ecosystem ◽  
Control Location ◽  
Target Fish ◽  
Reef Ecosystem

Dynamite fishing is one of the causes of damage to the coral reef ecosystem in Indonesia. Fishing activities using explosives (dynamite fishing) occur because of the desire of fishermen to get a lot of catch with low cost in a short time. Kapoposang Water Park (WP) is a region rich in marine biological resources. However, dynamite fishing activities which are still found within the area have caused the coral reef ecosystem to be severely damaged. The results showed a lower difference in the percentage of live coral cover at dynamite fishing locations (DF1, DF2) compared to control locations (K1, K2). In addition, the highest average values of coral fish abundance were found at locations K1, DF1, and DF2. Conversely, the results of the analysis found the lowest fish abundance at the K2 location. Different from the average number of reef fish species that were higher at the control location (K1, K2) compared to dynamite fishing locations (DF1, DF2). For the target fish biomass there is no real difference between the control location and dynamite fishing.

scholarly journals KONDISI LINGKUNGAN DAN TERUMBU KARANG DI DAERAH PERLINDUNGAN LAUT PULAU PRAMUKA, KEPULAUAN SERIBU

2017 ◽  
Vol 3 (2) ◽  
pp. 115
Author(s):  
Andri Warsa ◽  
Baiq Ida Purnawati
Keyword(s):  
Coral Reef ◽  
Protected Area ◽  
Marine Protected Area ◽  
Marine Biota ◽  
Environmental Condition ◽  
Coral Reef Ecosystem ◽  
Fishing Activity ◽  
Coastal Resource ◽  
Line Intercept ◽  
Reef Ecosystem

Kawasan Kepulauan Seribu merupakan bagian dari wilayah Daerah Khusus Ibukota Jakarta, terletak pada posisi geografis antara 106°25’-106°40’ BT dan 05°24’-05°45’ LS. Daerah perlindungan laut adalah daerah yang ditutup secara permanen di mana semua kegiatan penangkapan ikan dan kegiatan lain dilarang. Tujuan penelitian ini untuk mengetahui kondisi lingkungan di daerah tersebut pada bulan April dan Juli 2007. Pengamatan kondisi ekosistem terumbu karang dilakukan dengan metode transek garis (line intercept transect) sepanjang 50 m sejajar garis pantai dan pengamatan kondisi oseanografi lima stasiun pengamatan. Hasil penelitian menunjukan kondisi oseanografi di daerah perlindungan laut Pulau Pramuka layak untuk kehidupan biota laut dengan konsentrasi oksigenterlarut berkisar antara 2,55-4,19 mg/L, salinitas berkisar antara 32-32,5o/oo, kecerahan berkisar antara 2-10 m, dan derajat keasaman (pH) berkisar antara 7,85-7,99. Kondisi kesehatan karang adalah sedang dan baik dengan persentase tutupan karang berkisar antara 30-75%. Seribu Islands region located at 106°25’-106°40’ E and 05°24’-05°45’ S which is a part of Jakarta Province. Marine protected area is a closed site permanently where extractive activity is prohibited, mainly fishing activity and the aim of this program is to conserve coastal resource. The aim of this research was to know environmental condition of Pramuka Island marine protected area at Seribu Islands. The research was done at marine protected area of Pramuka Island in April and July 2007. Monitoring of coral reef ecosystem was done with line intercept transect method along 50 m parallel with shore line and oceanography condition at 5 stations. The result of this research shown that oceanography condition at marine protected area of Pramuka Island was suitable for marine biota life with dissolved oxygen between 2.55-4.19 mg/L, salinity between 32-32.5o/oo, transparency between 2- 10 m, and pH between 7.5-7.99. Coral reef healthy condition is medium and good with percent covered between 30-75%.

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