scholarly journals Feeding ground indications are based on species, seagrass density and existence of Dugong dugon in Hiri Island Sea, North Maluku, Indonesia

2021 ◽  
Vol 890 (1) ◽  
pp. 012058
Author(s):  
N Akbar ◽  
I Marus ◽  
R Ridwan ◽  
A Baksir ◽  
R E Paembonan ◽  
...  
Keyword(s):  
Species Conservation ◽  
Species Density ◽  
Survey Method ◽  
Conservation Policies ◽  
Potential Habitat ◽  
Foraging Area ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems ◽  
Halodule Uninervis ◽  
Management And Conservation

Abstract Seagrass ecosystems are located between mangrove ecosystems and coral reefs. Seagrass ecosystems are habitats and foraging area for many marine organisms. Eco-biological cycles in seagrass ecosystems are important for maintaining populations of many organisms. Seagrass at Hiri Island is distributed horizontally along the coast. This island is also a location where Dugong dugon is found North Maluku. Dugong dugon is a vurneable species that has been included in the IUCN and Appendix I Cites. This study aimed to identify species, density of seagrass and existence of Dugong dugong. The survey method used quadratic transect method to collect seagrass data. The Results found 6 species of seagrass at Hiri Island. Five species of those seagrass (Cymodocea serrulata, Cymodecea rotundata, Halodule uninervis, Halodule pinifolia, Halophila spinulosa) are known as food of Dugong dugon. The highest species density was shown by Halodule uninervis. The presence of Dugong dugon and its feeding trail was found during field survey. Information on seagrass species and Dugong dugon sightings location can be used for endangered species conservation policies. Management and conservation efforts need to be done to maintain seagrass ecosystem and Dugong dugon potential habitat at Hiri Island.

Seagrass Ecosystems of Andaman and Nicobar Islands: Status and Future Perspective

2020 ◽  
Vol 7 (4) ◽  
pp. 169-174
Author(s):  
Chatragadda Ramesh ◽  
Raju Mohanraju
Keyword(s):  
Water Quality ◽  
Primary Production ◽  
Environmental Changes ◽  
Future Perspective ◽  
Marine Biodiversity ◽  
Seagrass Beds ◽  
Seagrass Meadows ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems ◽  
Nicobar Islands

Seagrasses are unique marine flowering plants that play an important ecological role by yielding primary production and carbon sequestration to the marine environment. Seagrass ecosystems are rich in organic matter, supporting the growth of bio-medically important epi and endophytic microorganisms and harbor rich marine biodiversity. They are an essential food source for endangered Andaman state animal Dugongs. Seagrasses are very sensitive to water quality changes, and therefore they serve as ecological bio-indicators for environmental changes. The benthic components in and around the seagrass beds support a significant food chain for other Micro and organisms apart from fishery resources. The epiphytic bacterial communities of the leaf blades support the sustenance against the diseases. Recent reports have shown that the loss of seagrass beds in tropical and temperate regions emphasizes the depletion of these resources, and proper management of seagrass is urgent. The decline of seagrass will impact primary production, biodiversity, and adjacent ecosystems, such as reefs. Therefore, restoring the seagrass meadows could be possible with effective implementing management programs, including seagrass meadows in marine protected areas, restoration projects, seagrass transplantation, implementation of legislative rules, monitoring coastal water quality and human activities in the coastal zone. Lacunas on the seagrass ecosystem management in Andaman & Nicobar Islands are addressed.

scholarly journals The Relationship of Megazoobenthos Association with Seagrass Ecosystem Conditions in Ujung Genteng Waters, Sukabumi

2020 ◽  
pp. 1-10
Author(s):  
Gilang Primanagita Rachman ◽  
Indah Riyantini ◽  
Zahidah Hasan ◽  
Herman Hamdani
Keyword(s):  
Diversity Index ◽  
Close Association ◽  
Strong Relationship ◽  
Survey Method ◽  
Association Pattern ◽  
Seagrass Ecosystem ◽  
Relationship Of ◽  
The Relationship ◽  
Seagrass Density ◽  
Diadema Setosum

Seagrass beds in Ujung Genteng waters are one of the shallow marine ecosystems that have relatively high biodiversity. Seagrass ecosystem as one of the coastal ecosystems in these waters has a diversity of marine life that is associated with it. The purpose of this study was to establish the association pattern and the correlation of mega zoobenthos to seagrass ecosystem conditions. The method used was a survey method by conducting a survey direct observation of the stations that have been determined.  Three seagrass species were identified, namely: Thallasia hemprichii, Cymodoceae rotundata and Enhalus acoroides. The highest density of seagrass was found in station 2 with the type of seagrass Thallasia hemprichii as much as 207 ind/m2. Fifteen mega zoobenthos species were identified representing 3 phyla. Species Mega zoobenthos which is most commonly found in Ujung Genteng waters is Ophiothrix fragilis, Ophiocoma erinaceus, and Diadema setosum. The mega zoobenthos Diversity Index at the observation station is included in the medium category that is 2.33-2.66 and the evenness index is 0.63-0.84. Correlation of seagrass density with mega zoobenthos obtained by 0.92 shows that there is a very strong relationship between seagrass density with mega zoobenthos. The result shows that there are 4 patterns of close association and 2 patterns of very close association. Ophiocoma erinaceus of the ophiuroidea class has a pattern of very close positive associations with seagrass Cymodoceae rotundata and Dendrodoris sp of the order nudibranchia has a pattern of very close negative associations with seagrass Cymodoceae rotundata.

scholarly journals STRUKTUR KOMUNITAS IKAN PADA EKOSISTEM LAMUN DI PANTAI PUDING KABUPATEN BANGKA SELATAN

2018 ◽  
Vol 12 (2) ◽  
pp. 35-44
Author(s):  
Sania Prisilia ◽  
Wahyu Adi ◽  
Arief Febrianto
Keyword(s):  
Strong Relationship ◽  
Data Retrieval ◽  
Line Transect ◽  
Thalassia Hemprichii ◽  
Seagrass Meadows ◽  
Gill Net ◽  
Seagrass Ecosystems ◽  
Halodule Uninervis ◽  
Relationship Of ◽  
Seagrass Density

Seagrass beds have a variety of roles in fish life, which can be used as nurseries, as a place for feeding ground, and for areas to seek protection. This study aims to analyze the structure of fish communities and seagrass communities and analyze the relationship of fish abundance with seagrass ecosystems. This research was conducted in March 2018 on the beach of Puding Air Banten II, Pasir Putih Village, Tukak Sadai District, Bangka Selatan Regency. Line transect method for seagrass data collection and fish data retrieval using fixed gill nets (gill net). The results of the study found that the total number of individual fish as much as 409 ind / m2 consisted of 25 species. The highest abundance of fish found in Station I with Ambassis interrupta species as many as 241 ind / m2. There were six types of seagrass found on the coast of Puding, namely Enhalus acoroides, Thalassia hemprichii, Halodule uninervis, Halophila spinulosa, Halophila decipiens and Cymodocea serrulata. The highest seagrass density was found at Station I with the seagrass Halodule uninervis species of 2541 ind / m2. Correlation coefficient analysis shows that the abundance of fish with seagrass density has a significant value of 0.956 which is classified as having a very strong relationship. Fish have higher abundance with seagrass meadows which vegetate with mangroves

scholarly journals PENGARUH KERAPATAN LAMUN Thalassia hemprichii TERHADAP KELIMPAHAN BAKTERI HETEROTROF DI PANTAI PRAWEAN, JEPARA

2018 ◽  
Vol 7 (4) ◽  
pp. 415-422
Author(s):  
Isnaini Dian Yunita ◽  
Niniek Widyorini ◽  
Supriharyono Supriharyono
Keyword(s):  
Heterotrophic Bacteria ◽  
Nutrient Cycle ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Ecosystem ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Economic Function ◽  
Seagrass Density

Ekosistem lamun merupakan salah satu ekosistem yang memiliki kompleksitas dan keanekaragaman hayati yang tinggi. Padang lamun merupakan hamparan vegetasi lamun yang menutupi suatu kawasan pesisir. Selain memiliki fungsi ekonomi, lamun juga memiliki fungsi ekologis yakni berperan penting sebagai pendaur zat hara oleh mikroorganime yaitu bakteri. Penelitian ini bertujuan untuk mengetahui kerapatan lamun, kelimpahan bakteri heterotrof yang berasosiasi dengan lamun serta pengaruh kerapatan lamun dengan kelimpahan bakteri heterotrof di Pantai Prawean, Jepara. Metode yang digunakan yakni deskriptif eksplanatif dengan pengambilan sampel secara purposive dan dianalisis dengan IBM SPSS Statistic 22. Jenis lamun yang ditemukan di Pantai Prawean ada 5 (lima): Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis dan Halodule pinifolia. Kerapatan tertinggi didapat dari jenis Thalassia hemprichii sebesar 78 Ind/m2 dan terendah adalah Enhalus acoroides 10 Ind/m2 dan kelimpahan bakteri heterotrof tertinggi diperoleh dari tingkat kerapatan rapat di stasiun 3 yakni 29,4x108 Upk/ml dan kelimpahan terendah diperoleh dari tingkat kerapatan jarang di stasiun 2 yakni 3,3x108 Upk/ml. Korelasi antara kerapatan lamun dengan kelimpahan bakteri heterotrof tinggi atau kuat yakni 0,896 dan korelasi ini dinyatakan sangat signifikan terbukti nilai sig. 0,001 dengan tingkat kesalahan 0,1%. Artinya bertambahnya kerapatan lamun dapat meningkatkan pula kelimpahan bakteri heterotrof. Seagrass ecosystem is one ecosytems that has high complexity and biodiversity. Seagrass beds are a stretch of seagrass vegetation that covers a coastal area. Beside its economic function, seagrass also have ecological function that play an important role of nutrient cycle for microorganism its bacteria. This study aims to determine the density of seagrass, the abundance of heterothropic bacteria and influence of seagrass density with abundance of heterotrophic bacteria at Prawean beach, Jepara. The method used in this study is descriptive explanative with purposive sampling and the data analyzed by IBM SPSS Statistic 22. There are 5 (five) species of seagrass that can be found in Prawean beach: Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halodule uninervis and Halodule pinifolia. The highest density obtained from Thalassia hemprichii species is 78 sprouts of seagrass/m2 and the lowest density obtained from Enhalus acoroides is 10 obtained from seagrass density at station 3 its value 29,4x108Cfu/ml and the lowest abundance of heterotrophic bacteria was obtained from rare seagrass at station 2 its value 3,3x108Cfu/ml.  The corelation between seagrass density with abundance heterotrophic bacteria is high or strong that has value 0,846 and this correlation is very significantly proven has sig value 0,001 with error rate 0,1%, it can be conclude that increase of seagrass density can also increase the abundance of heterotrophic bacteria.  

scholarly journals Low Discounting Behavior among Small-Scale Fishers in Fiji and Sabah, Malaysia

2011 ◽  
Vol 3 (6) ◽  
pp. 897-913 ◽  
Author(s):  
Louise S. L. Teh ◽  
Lydia C. L. Teh ◽  
U. Rashid Sumaila
Keyword(s):  
Experimental Approach ◽  
Small Scale ◽  
Economic Factors ◽  
Discount Rates ◽  
Cultural Economic ◽  
Conservation Policies ◽  
Management Interventions ◽  
Tropical Reef ◽  
Management And Conservation ◽  
Socio Economic Factors

Understanding the socio-economic factors that are associated with fishers’ willingness to delay gratification may be useful for designing appropriate fisheries management and conservation policies. We aim to identify the predictors of low discounting behaviour among fishers, which is analogous to having a longer-term outlook. We base our empirical study on two small-scale tropical reef fisheries in Sabah, Malaysia, and Fiji. We use an experimental approach to identify fishers with low discount rates, and then use a logistic regression model to identify predictors of low discount rates. We find that 42% of the respondents have low discount rates, and that site and village level variables are significant predictors of low discount rates. Within Sabah and Fiji, boat ownership and relative catch differentiate low discounting from non-low discounting fishers, but these variables have contradictory effects in Sabah and Fiji. Overall, our results imply that a substantial proportion of reef fishers may be willing to engage in conservation initiatives; however, local socio-cultural, economic, and ecological conditions have to be considered first during the process of designing management interventions.

scholarly journals NILAI EKONOMI EKOSISTEM LAMUN DI KOTA BONTANG

2018 ◽  
Vol 14 (3) ◽  
pp. 228
Author(s):  
Nurul Ovia Oktawati ◽  
Erwan Sulistianto ◽  
Wahyu Fahrizal ◽  
Freddy Maryanto
Keyword(s):  
Economic Development ◽  
Natural Resources ◽  
Sampling Method ◽  
Economic Value ◽  
Option Value ◽  
Resource Base ◽  
Indirect Benefits ◽  
Seagrass Ecosystem ◽  
Seagrass Ecosystems ◽  
Total Economic Value

Seagrass is one of the important ecosystems in shallow coastal and marine waters, because it has many roles, both ecologically and economically. Bontang City is one area that has a vast seagrass ecosystem. Management of seagrass ecosystems in Bontang City, of course, wants the existence of sustainable economic development, but on the other hand, sometimes increasing economic needs based on natural resources (resource base), often create a dilemma for the sustainability of natural resources. This happens because the consumption needs of the community are often not supported by good planning and management in utilizing natural resources so that the deterioration of environmental quality is often seen as a cost that must be paid in a process of economic development. The purposes of this study are 1). Identifying forms of utilization from seagrass ecosystems, 2) knowing the economic value of seagrass ecosystems. The sampling method used was purposive sampling. The results of the study revealed that fishing activities with splint catches and nets were a form of seagrass ecosystem utilization activities. Based on the results of data analysis, it is known that the total economic value of 4 (four) utilization of seagrass ecosystems in Bontang City is Rp. 7,081,050,816,042 per year. The utilization value with the largest proportion comes from the value of indirect benefits which is equal to 95.66%, and the lowest proportion is the option value.

scholarly journals Asosiasi gastropoda di ekosistem padang lamun Perairan Senggarang Besar, Kepulauan Riau, Indonesia

2020 ◽  
Vol 4 (2) ◽  
pp. 53
Author(s):  
Fajeri Fajeri ◽  
Febrianti Lestari ◽  
Susiana Susiana
Keyword(s):  
Random Sampling ◽  
Sampling Method ◽  
Positive Association ◽  
Total Density ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Seagrass Ecosystem ◽  
Density Values ◽  
Halodule Uninervis ◽  
Syringodium Isoetifolium

This study aims to determine the type and density of gastropods, the density of seagrass, seagrass closure. It also knows the association gastropods in seagrass ecosystem in the waters of the Senggarang Besar. The research was conducted by random sampling method using a point 31 transect squares measuring 1x1 meters for observation gastropods and seagrass. Results of the study were found 12 species of gastropods. Gastropod density values range between 0.35-2.94 individual/m2. Results of research on the type of seagrass found 4 species of seagrass that is, Enhalus acoroides, Thalassia hemprichii, Halodule uninervis and Syringodium isoetifolium. A density value of seagrass species Enhalus acoides 14.32 individual/m2, Thalassia hemprichii 86.39 individual/m2, Halodule uninervis 21.58 individual/m2 and Syringodium isoetifolium 3.87 individual/m2. Total density of all seagrass 126.16 individual/m2. The closure of the Seagrass Enhalus acoides 12,63%, Thalassia hemprichii 50,96%, Halodule unnerves 13,40%  and Syringodium isotifolium 0.29%. Total closure of all seagrass is 77,29%. The level of association between species of gastropods as many as 11 species have negative associations of which is Leavistrombus turturela, Strombus urceus, Planaxis sulcatus, Cerithium nesioticum, Cerithium Aluco, Cerithium zonatum, Pugilina cocholidium, Cronia margariticola, Muricodrupa fiscela, Pyrene epamella, Otopleura auriscati. While 1 species has a positive association level is kind of Rhinoclavis aspera.

scholarly journals Peranan Padang Lamun Selatan Bali Sebagai Pendukung Kelimpahan Ikan di Perairan Bali

2017 ◽  
Vol 3 (1) ◽  
pp. 10
Author(s):  
Elok Faiqoh ◽  
Dwi Budi Wiyanto ◽  
I Gede Budi Astrawan
Keyword(s):  
Species Abundance ◽  
Coastal Areas ◽  
Nursery Ground ◽  
Seagrass Ecosystem ◽  
The Family ◽  
Sea Grass ◽  
Seagrass Ecosystems ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

Seagrass ecosystem is providing feeding ground, nursery ground, spawning ground , habitat and shelter area. The threat of physical destruction such as the reclamation, pollution, sedimentation and tourism activities decreasing the diversity and the abundance of fishery commodities. The purpose of this study was to describe the condition of seagrass, determine the composition and abundance of seagrass fish in the three Southern coast of Bali and assess the association of fish-sea grass. Samples were taken from three coastal areas, Samuh, Shindu and Serangan coastal area. The results are in Samuhthere are 6 types of seagrass, in Shindu there are 7 types and in Serangan there are three types, whichdominates with Cymodocea rotundata and Syringodium isoetifolium. From the three coastal areas,we found 21 families of fish, where the family Pomacentridaehas the highest species abundance in Samuh, Apogon sp in Serangan and Terapon sp. found in Shindu. We can see the interaction between the seagrass ecosystems of coral reefs in the waters of South Bali and ecological role of seagrass from the family and species of fish.

scholarly journals Kesesuaian Zonasi Pulau-Pulau Kecil : Studi Kasus Kawasan Konservasi Gili Sulat Gili Lawang Lombok Indonesia

2020 ◽  
Vol 6 (2) ◽  
pp. 202
Author(s):  
Sitti Hilyana ◽  
Sadikin Amir ◽  
Saptono Waspodo
Keyword(s):  
Coral Reef ◽  
Group Discussion ◽  
Mangrove Ecosystem ◽  
Structured Interview ◽  
Marine Biodiversity ◽  
Suitability Analysis ◽  
Seagrass Ecosystem ◽  
Coral Reef Ecosystems ◽  
Seagrass Ecosystems ◽  
Coral Reef Area

Gili Sulat Gili Lawang are small islands that have high marine biodiversity and have been designated as a Marine Tourism Park (TWP) covering an area of 10,000 hectares.  This study aims to analyze the suitability of zoning and analysis of space use in each zone. The data was collected by using a structured interview technique using a questionnaire and Focus Group Discussion (FGD) approach. Zoning suitability analysis used a Geographic Information System (GIS). The assessment showed that the conditions of the mangrove ecosystem, coral reef ecosystem and seagrass ecosystem were in the bad to good categories. Based on the zoning suitability analysis of 193.83 hectares (44.02%) of the coral reef area suitable for the core zone, 143.33 hectares (32.55%) consists of 108 hectares of coral reef ecosystems and 35.43 hectares of seagrass ecosystems suitable for the zone. limited use, and 9,666.47 hectares are suitable for other zones consisting of a coral reef rehabilitation zone covering an area of 93.11 hectares, a protection zone of 93.11 hectares and other waters 8,585.76 hectares.

scholarly journals Modeling potential distribution of Indo-Pacific humpback dolphins (Sousa chinensis) in the Beibu Gulf, China

2016 ◽  
Author(s):  
Mei Chen ◽  
Yuqin Song ◽  
Dagong Qin
Keyword(s):  
Southern China ◽  
Species Conservation ◽  
High Mobility ◽  
Feeding Preference ◽  
Google Earth ◽  
Beibu Gulf ◽  
Landsat Images ◽  
Potential Habitat ◽  
Sousa Chinensis ◽  
Elevation Model

Background. Mapping key habitats of marine mega-vertebrates with high mobility is crucial for species conservation. Due to difficulties in obtaining sound data in the field, Species Distribution Modeling (SDM) provides an effective alternative to identify habitats. As a keystone and flagship species in inshore waters in southern China, Indo-Pacific humpback dolphins (Sousa chinensis) play an important role in coastal ecosystems. However, our knowledge on their key habitats remained unclear in some waters including the Beibu Gulf of South China Sea. Methods. We used a maximum entropy (Maxent) modeling approach to predict potential habitats for Sousa chinensis in the Beibu Gulf of China. Models were based on eight independent oceanographic variables derived from Google Earth Digital Elevation Model (DEM) and Landsat images, and presence-only sighting data from boat-based surveys and literatures during 2003-2013. Results. Three variables, distance to major river mouths, to coast and to 10-m isobaths, were the strongest predictors, consistent with other studies on the dolphin habitat selection. Furthermore, we confirmed that influence of estuaries was the most important and irreplaceable. Besides two known distribution areas as well as data sources, a new area close to the boundary of China and Vietnam, Beilunhe Estuary (BE), was predicted as a potential habitat. Discussion. Influence of estuaries is likely to indicate feeding preference of the humpback dolphins. The “new” habitat BE should be a key area connecting China and Vietnam dolphins, and deserved to be examined and preserved.

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