David Julian

Lampung University

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i-10 index

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Co-Authors

Serkan Teker

Akdeniz University

Mehmet Gökoğlu

Akdeniz University

Qadar Hasani

Lampung University

Rachmad Caesario

Lampung University

Rizha Bery Putriani

Lampung University

Lana Izzul Azkia

Sultan Ageng Tirtayasa University

Suparmono Suparmono

Lampung University

Abdullah Aman Damai

Lampung University

Muhamad Gilang Arindra Putra

Lampung University

Muhammad Reza

Lampung University

Cooperative Institutions

Lampung University

IPB University

Hellenic Centre for Marine Research

Agricultural Research Organization

Universitas Bandar Lampung

University of the Aegean

Brazilian Agricultural Research Corporation

Central Luzon State University

Aristotle University of Thessaloniki

Jain Irrigation Systems (Israel)

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First Record of Janthina globosa Swainson, 1822 (Mollusca, Gastropoda) and Prostheceraeus giesbrechtii Lang, 1884 (Platyhelminthes) in the Gulf of Antalya

Natural and Engineering Sciences (2017)

Serkan Teker Mehmet Gökoğlu David Julian

During the survey study, a holo-planktonic gastropod species Janthina globosa Swainson, 1822 was captured for the first time during trawl shootings at 20-30 m depths from the Gulf of Antalya on 24th June 2015. On 15th July 2015, during the underwater diving, a colourful flatworm Prostheceraeus giesbrechtii was observed at the hard substratum depths of 5-7 m near the old Harbour (Antalya) (36o 35’ 5,15’’N; 30o 42’ 1,45’’E). The flatworm was taken to laboratory and photographed. Its length was approximately 2-3 cm and 1-1.5 mm thick. This species is the first record for the Gulf of Antalya, the North-eastern Mediterranean part of Turkey.

Flatworm

10.28978/nesciences.292337

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Citations (4)

FIRST REPORT OF THRESHER SHARKS (ALOPIIDAE) IN THE GULF OF ANTALYA

Mehmet Gökoğlu Serkan Teker David Julian

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Integrated Coastal Zone Management for Sustainable Ecotourism in Kalangan Hamlet, Pulau Pahawang Village, Lampung: A Case Study

JURNAL BIOLOGI TROPIS (2024)

Muhammad Reza David Julian Muhamad Gilang Arindra Putra Lana Izzul Azkia

Kalangan Hamlet is one of the coastal communities in Pahawang Island Village, Lampung. It has abundant natural resources and offers prospects as a tourist destination. It is located away from Pahawang Island, so the area is considerably behind in terms of tourism management. The aim of the research was to develop effective strategies for managing the coastal areas of Kalangan Hamlet. The strategies had been suggested to contribute to Kalangan Hamlet's potential for coastal tourism growth. Data was collected using survey and observation methods, with respondents chosen through the snowball sampling technique. The collected data was analyzed using Strengths, Weakness, Opportunities, and Thread (SWOT) analysis and Analytic Hierarchy Process (AHP). The primary strategy for managing the coastal areas of Kalangan Hamlet involves enhancing infrastructure to support tourism, while simultaneously prioritizing the preservation of the natural ecosystem and ensuring the well-being of the local population. This approach balances economic development with environmental sustainability and social equity, thereby fostering a holistic and sustainable tourism model.

HAMLET (protein complex)

10.29303/jbt.v24i2.6703

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Utilization of light-emitting diode lamp on lift net fishery.

Aquaculture, Aquarium, Conservation & Legislation (2015)

Gondo Puspito Imanuel M Thenu David Julian Ismawan Tallo

Lift (data mining)

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Strategy to Development of Ecotourism in Kiluan Bay Lampung

JURNAL BIOLOGI TROPIS (2023)

Muhammad Reza Lana Izzul Azkia David Julian Rizha Bery Putriani

Kiluan Bay is a coastal region in Tanggamus Regency, Lampung Province, with a very high potential for tourism. Increased levels of tourists may have a negative impact on Kiluan Bay's natural resources, one of which is the accumulation of trash. The ecosystem at Kiluan Bay may be impacted by trash accumulation, especially plastics. If these issues are not properly handled, it will have an impact on the sustainability of tourism activities and the preservation of the environment. Even so, this will have an effect on the local economy. In order to reduce the negative impacts of tourism activities that are not environmentally friendly, it is thought that the concept of ecotourism needs to be implemented at Kiluan Bay. The purpose of this study is to establish ecotourism development strategies that emphasize community knowledge at the local level. Survey techniques and interviews with relevant persons were used to collect the data. The results of the data collection were analyzed using a SWOT analysis to determine the alternative strategies required to support the implementation of the ecotourism concept in Kiluan Bay. The research showed that Kiluan Bay's ecotourism development is positioned in quadrant V (Growth/Stable). This viewpoint suggests that the ecotourism development strategy in Kiluan Bay, Lampung, must take the most of the existing opportunities. Developing an ecotourism management approach in Kiluan Bay that involves the community directly is one strategy that had to be implemented.

SWOT Analysis

Local Community

10.29303/jbt.v23i2.4853

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Citations (1)

Physical and chemical processes in the application of CA and/or fumigation

Phytoparasitica (2001)

Cecilia V. De Dios Maria Finesa A. Cosico Ma. Elvira M. Martinez David Julian I. V. Dator

10.1007/bf02981878

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Hypotaurine protects against H₂S‐induced oxidative stress and cell death in erythrocytes from an H₂S‐tolerant marine worm

The FASEB Journal (2008)

Jessica A Ortega Jocelynn M Ortega David Julian

Many marine invertebrates adapted to H 2 S contain high concentrations of the organic osmolyte hypotaurine (H). In the presence of H 2 S, H is converted to thiotaurine (Th), and the Th:(H+Th) ratio is higher in animals from environments with higher H 2 S, suggesting that H can serve as a H 2 S buffer. However, H and possibly Th are antioxidants and therefore may also protect against free radicals produced by H 2 S oxidation. We used erythrocytes from the H 2 S‐tolerant marine polychaete Glycera dibranchiata to determine whether H reduces cell death and oxidative stress caused by H 2 S exposure in vitro. Greater than 90% of cells were killed by exposure to 0.3% H 2 S gas (based on calcein‐AM staining) but this death was decreased by 60%, 78%, and 83% with 0.5, 5.0 and 50 mM H, respectively (p<0.001 for each, n=8). Similar trends were observed at both higher and lower H 2 S concentrations (0.1, 1 and 3% H 2 S). Oxidative stress (based on H 2 DCFDA) was increased 67% by H 2 S (p<0.0001), but this increase was attenuated by H (p=0.0002). In contrast, H did not decrease the effect of H 2 O 2 (0.01–10 mM) on cell death (p=0.001) or oxidative stress (p=0.038), and H that was pre‐converted to Th did not reduce H 2 S‐induced cell death (p<0.0001). Therefore, hypotaurine protects against cell death and oxidative stress, although it remains unknown whether these effects are due to sulfide buffering or free radical scavenging.

Hypotaurine

10.1096/fasebj.22.1_supplement.758.40

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Utilization of light-emitting diode lamp on lift net

Imanuel M Thenu David Julian Gondo Puspito

The research aimed to prove the LED (light emitting diode) lamp efficiency in lift net fishing and to find out the optimum time for lift net fishing operation. In this study, 2 lift net operated simultaneously for 15 nights. Each lift net has attached 4 LED lamps and 4 fluorescent lamps. Result showed that composition of lift net catches consist of anchovies (Stolephorus spp.) weighing 107 kg, pony fish (Leiognathus dussumieri) 68 kg, trasi shrimp (Mysis sp.) 45 kg, yellowstripe scad (Selaroides leptolepis) 16 kg, indian mackerel (Rastrelliger spp.) 8 kg, squid (Loligo sp.) 34 kg, and hairtail (Trichiurus sp.) 12 kg. Lift net operated with LED lamp was able to capture water organism weighing 159 kg. It is more effective compared to fluorescent lamp which caught only 131 kg. Meanwhile, time operation between 6 PM - 9 PM produced organisms weighing 56 kg, higher than the interval time of 9 PM - 12 AM (41 kg), 12 AM - 3 AM (32 kg) and 03 AM - 06 AM (30 kg).

Lift (data mining)

Pony

Loligo

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Hubungan Panjang-Berat dan Faktor Kondisi Ikan Kembung Lelaki (Rastrelliger kanagurta) yang Didaratkan di Pelabuhan Perikanan Pantai Lempasing Bandar Lampung

JURNAL SUMBERDAYA AKUATIK INDOPASIFIK (2023)

Qadar Hasani Irvan Hambali Abdullah Aman Damai Suparmono Suparmono David Julian

Volume hasil tangkapan dan harga ikan kembung di Kota Bandar Lampung yang terus meningkat beberapa tahun terakhir, mendorong upaya penangkapan yang semakin intensif dan ekploitatif. Penelitian ini bertujuan menganalisis hubungan panjang-berat, sebaran panjang, faktor kondisi, dan pola petumbuhan ikan kembung lelaki (Rastrelliger kanagurta) yang didaratkan di PPP Lempasing, Kota Bandar Lampung. Penelitian ini diharpakan menjadi informasi dasar bagi pengelolaan sumberdaya ikan kembung lelaki di Perairan Teluk Lampung dan sekitarnya. Sampel ikan kembung lelaki diperoleh dari ikan yang di daratkan di PPP Lempasing sepanjang bulan Juli-September 2022. Sampel ikan diukur panjang dengan pita ukur, dan beratnya mengunakan timbangan digital dengan ketelitian 1 mm dan 0,1 gr, selanjutnya dianalisis sebaran panjangnya, faktor kondisi dan hubungan panjang-berat. Ukuran panjang ikan yang didaratkan di PPP Lempasing berkisar antara 170–282 mm. Ukuran ikan terkecil pada selang kelas 170–184 mm. Ukuran ikan yang paling banyak tertangkap selang kelas 230–240 mm. Faktor kondisi tertinggi bernilai 1,02 ditemukan pada selang kelas ikan terkecil. Nilai faktor kondisi menunjukkan nilai tidak berbeda nyata dengan 1. Hubungan panjang-berat menunjukkan persamaan W=0,0017L2,086 dengan nilai koefien determinasi (R²) sebear 0,811. Pola pertumbuhan ikan kembung lelaki bersifat allometrik negatif. Hal ini menggambarkan bahwa ikan kembung lelaki lelaki cenderung pipih. Penelitian lebih lanjut terkait pola reproduksi, indeks kematangan gonad, komposisi jumlah dan produktivitas hasil tangkapan, hubungannya parameter lingkungan secara periodik dan berkelanjutan sangat dibutuhkan dalam rangka upaya pengelolaan sumberdaya ikan kembung lelaki yang presisi dan berkelanjutan.

10.46252/jsai-fpik-unipa.2023.vol.7.no.2.291

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Changes in density level and mangrove land cover on Teluk Pandan Coast, Lampung, Indonesia, after 10 years of community-based management

Biodiversitas Journal of Biological Diversity (2023)

Qadar Hasani AYU ANISA Abdullah Aman Damai Darma Yuliana Indra Gumay Yudha

Abstract. Hasani Q, Anisa A, Damai AA, Yuliana D, Yudha IG, Julian D. 2023. Changes in density level and mangrove land cover on Teluk Pandan Coast, Lampung, Indonesia, after 10 years of community-based management. Biodiversitas 24: 3735-3742. The mangrove ecosystem in the Teluk Pandan coastal area, Pesawaran District, Lampung Province, Indonesia, is part of the mega-biodiversity of mangroves in Indonesia. Specifically, the mangrove in this region has changed due to tourism, aquaculture, settlement activities and coastal abrasion. This study aimed to assess the changes in density level and area change of the mangrove forests at five coastal villages in Teluk Pandan during the period of community management from 2010 to 2020. The effort and success of the rehabilitation were reported in this study can be useful as a consideration of sustainable management of mangrove ecosystem both in Lampung and in other areas in Indonesia. Mangrove area was estimated through field surveys and data processing of satellite imagery from Landsat 5 in 2010 and Landsat 8 in 2020. The mangrove density level and area change were calculated by layering images of mangrove distribution from different years. The classification of mangrove density was determined based on the NDVI value. Satellite imagery was compared with field data collected from 20 observation points at five villages to ensure the density level and interpretation accuracy. Image data analysis showed the changes in mangrove area from 109.80 ha in 2010, an increase of 16.39% to 127.80 ha in 2020. The area of mangrove forest in the rare category decreased by 49.35%, the moderate category increased by 39.13%, and the dense category increased by 109.71%. The study confirmed the successful effort to manage and preserve mangroves in Teluk Pandan Sub-district. Eventually, community-based mangrove management (CBMM) and cross-sectoral and multi-stakeholder management (co-management) has become the core strategy in the successful management of mangrove at five coastal villages in Teluk Pandan Sub-district.

Mangrove ecosystem

Land Cover

10.13057/biodiv/d240710

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Citations (3)