Luky Adrianto

Under pressure: Investigating marine resource-based livelihoods in Jakarta Bay and the Thousand Islands

Jakarta Bay, next to the Jakarta Metropolitan Area with around 30 million inhabitants, is facing extreme pollution. Although local coral reefs are degraded and marine resources heavily exploited, they provide livelihoods for millions of people. This study investigates anthropogenic pressures on local fisheries resources and associated livelihoods. Questionnaire surveys were conducted in 15 coastal communities (10 coastal neighborhoods in Jakarta Bay on the mainland and 5 of the offshore Thousand Islands). The most economically valuable species were Caesio cuning (Redbelly yellowtail fusilier) on the islands and Rastrelliger kanagurta (Indian mackerel) on the mainland. Over 80% of all interviewed fishermen regarded the current state of marine resources as declining, mainly due to pollution and overexploitation. While perceptions of declining resources were equally high on the islands and the mainland, pollution was listed as the principal cause of degradation significantly more on the mainland. Findings are discussed in the context of coastal livelihood vulnerability.

First record of Puerulus mesodontus Chan, Ma & Chu, 2013 (Crustacea, Decapoda, Achelata, Palinuridae) from south of Java, Indonesia

Abstract Background Three specimens of Puerulus mesodontus Chan, Ma & Chu, 2013 (Crustacea, Decapoda, Achelata, Palinuridae) were collected from Palabuhanratu Bay, southern Java, Indonesia. There is no previous record on the presence of the species in Indonesia. This finding represents the first record of this species in Java, Indonesia, and confirms that the species is present in the Indian Ocean. The morphological characters of the species are described. New information This paper contains a new distribution record of a lobster species from Indonesian waters.

HASIL TANGKAPAN PER UPAYA DAN PARAMETER POPULASI LOBSTER PASIR (Panulirus homarus) DI PERAIRAN GUNUNG KIDUL Catch per Unit Effort and Population Parameters of Scalloped Spiny Lobster (Panulirus homarus) in Gunung Kidul Waters

Scalloped Spiny Lobster (P. homarus) of the genus Panulirus is the most caught species in the coastal waters of Gunung Kidul. The intensity of fishing activities and less environmentally friendly fishing practices caused decline in catch per unit effort (CPUE) of this species. The objective of this study is to analyze the exploitation rate of P. homarus in Gunung Kidul waters using CPUE trend and population parameters as indicators. From February 2013 to January 2014, there were 1067of P. homarus collected using a stratified random sampling method for the duration of the research.The carapace length data were analyzed using analytical model application of ELEFAN I program. Daily catchment product was obtained from middlemen for five consecutive years to identify the CPUE trend. The result showed that there was a decrease in CPUE of P. homarus in 2010 and 2011.The average carapace length of the first capture (Lc) (53 mm CL) was smaller than the size of first sexually mature lobster (Lm) (58,5 mm CL). The exploitation rate of P. homarus had also exceeded 0,5. These factors indicated that Scalloped Spiny Lobster (P. homarus) was over exploited. In this study, mortality rate of fish catches (F) was influenced by the high value of E0.5 which is highly correlated with fishing pressure.Von Bertalanffy growth function shows that both females and males of P. homarus have a slow growth rate (0,46/year and 0,49/year), which is still in the range of Palinuridae family’s growth rate (0,27-0,54/year). The maximum age is between 8-10 years old, which is younger than other lobster species in Palinuridae family. Harvest control and environmentally friendly fishing practices are necessary to reduce fishing pressure of this species. Keywords: CPUE, exploitation, Panulirus homarus, populationABSTRAKLobster pasir (Panulirus homarus) merupakan spesies lobster dari genus Panulirus yang paling banyak tertangkap di perairan Gunung Kidul. Intensitas penangkapan yang dilakukan sepanjang tahun serta ketidakpahaman sebagian besar nelayan terhadap penangkapan yang ramah lingkungan telah mengakibatkan penurunan hasil tangkapan per upaya tangkap (CPUE) dari spesis ini.Tujuan penelitian ini adalah untuk menganalisis tekanan eksploitasi P. homarus di perairan Gunung Kidul ditinjau dari tren CPUE dan parameter populasinya. Penelitian dilakukan pada bulan Februari 2013–Januari 2014. Sebanyak 1067 ekor P. homarus dijadikan contoh dengan metode penarikan contoh acak berlapis setiap bulan selama periode penelitian. Data panjang karapas P. Homarus diolah dengan aplikasi model analitik menggunakan program ELEFAN 1. Data hasil tangkapan harian diperoleh melalui catatan pembelian nelayan pengumpul selama lima tahun berturut-turut untuk mengetahui tren CPUE. Hasil penelitian menunjukkan bahwa telah terjadi penurunan CPUE P. homarus pada tahun 2010 dan 2011. Ukuran rata-rata P. homarus pertama kali tertangkap (Lc) lebih kecil (53 mm CL) dari ukuran matang kelamin secara fungsionalnya (Lm) (58,5 mm CL). Nilai laju eksploitasi (E0.5) juga sudah melebihi 0,5. Dua hal ini menjadi indikator sudah mengalami tangkap lebih.Nilai laju kematian karena penangkapan (F) berkontribusi besar terhadap tingginya nilai E dalam penelitan ini, yang dikaitkan erat dengan tingginya tekanan penangkapan terhadap spesis ini. Fungsi pertumbuhan von Bertalanffy untuk lobster betina dan jantan menunjukkan bahwa lobster memiliki pertumbuhan yang lambat (0,46/tahun dan 0,49/tahun) namun masih dalam rentang laju pertumbuhan dari lobster-lobster famili Palinuridae pada umumnya (0,27-0,54/tahun). Umur maksimal yang dapat dicapai antara 8-10 tahun, lebih muda dibanding lobster-lobster famili Palinuridae pada umumnya. Pengendalian penangkapan dan penerapan penangkapan yang ramah lingkungan perlu dilakukan untuk menghindari tekanan penangkapan terhadap spesis ini.Kata kunci: CPUE, eksploitasi, Panulirus homarus, populasi

PENGELOLAAN PERIKANAN LOBSTER DENGAN PENDEKATAN EAFM DI TELUK PALABUHANRATU

This research was conducted in the Palabuhanratu Bay-Sukabumi in March 2016. The purpose of this study is to diagnose the Palabuhanratu Lobster Fishery using factors of Ecosystem Approach to Fisheries Management (EAFM). Water sampling was conducted at two lobster fishing ground. Measuring and weighing morphology lobster were conducted in collectorss house. The results of this study showed that Palabuhanratu bay water quality was still within tolerable limits for live lobster. Panulirus homarus is the most widely lobster caught below the size of a decent catch, reaching 2528.9 Kg. CPUE of lobster was declining which indicates a decline in the stock of lobster. The income of fishermen were still very far from the average wage and stakeholder participation was still lacking in the management of the lobster fishery.

Metabolisme Emergi Sumberdaya Kota Pesisir Dan Aplikasinya Untuk Evaluasi Perencanaan Kota Pesisir Yang Berkelanjutan, Studi Kasus Kota Makassar

Kestabilan dan keberlanjutan suatu sistem sosial ekologi di Kota Pesisir tergantung dari optimal dan efisiennya pemanfaatan energi sumber daya yang tersedia. Siklus autokatalitik dalam metabolisme kota pesisir memberikan gambaran nyata bagaimana energi sumber daya mengalir antara manusia dan sumberdaya alam dan bagaimana manusia mengatur dan memanfaatkan energi sumberdaya alam yang tersedia. Penelitian ini bertujuan untuk memodelkan siklus energi dan meterial dalam batas sistem kota pesisir yang mengakomodir semua sumberdaya alam yang menghasilkan energi yang dimiliki Kota Makassar dalam rentang waktu tertentu, sehingga mampu menunjukkan trend pemanfaatan dan keberlanjutan sistem dalam upaya menstabilkan diri terhadap dinamika penggunaan lahan dan pertumbuhan penduduk. Metode penelitian yang digunakan didasarkan pada konsep perhitungan aliran emergy dan indeks penilaian keberlanjutan metabolisme kota pesisir. Hasil penelitian menunjukkan bahwa total emergy yang mengalir di tahun 2001 sebesar 1,68E+21 Sej, meningkat menjadi 2,02E+21 Sej pada tahun 2015. Hasil analisis indeks keberlanjutan menunjukkan bahwa energi sumberdaya lokal sudah tidak mampu memenuhi kebutuhan energy masyarakat Kota Makassar, dan untuk memenuhi ketercukupan energi dalam sistem, input energi berupa impor sumberdaya mendominasi aliran energi dalam sistem. Tentunya diperlukan efisiensi dalam pemanfaatan energi sumberdaya, agar keberlanjutan metabolisme kota pesisir dapat terus berlangsung.

Sedimentation in lagoon waters (Case study on Segara Anakan Lagoon)

This study aims to demonstrate the effect of sedimentation on waters area that serves as an advocate for life. It is included in the category to be wary considering these conditions will reduce the quality of life and threaten the life and survival of endemic biota. Observations rate of sedimentation since April 2014 until March 2015 performed at 6 stations that are considered to represent the condition of the lagoon. The observations for rate of sedimentation was conducted twice in a month for one year. Oceanographic parameters was taken by CTD (Conductivity, Temperature, and Depth) sensor in two seasons, at the height of the rainy season, March 2014 and August 2014. Results showed that the aquatic area more narrow characterized by changes in the outside line of the island visible on the image observation for two decades.

Estimating and Measuring of the Value of Pelagic Tourism System - Preliminary Mapping and A Literature and Secondary Reviews

This article proposed selected tourism services of the pelagic system in the Lesser Sunda Ecoregion that will be mapped, measured, and valued in the content of mapping ocean wealth of the Lesser Sunda Ecoregion of Indonesian Pelagic System. This article also reviewed view of the applied methodology for valuing ecosystem services (type of cultural services - tourism activities) and overview the existing value of cultural services (tourism activities) based on a view of literature survey. At the end, this article also proposed the method to value tourism services of the pelagic system in the Lesser Sunda Ecoregion.

Kondisi Sosial Ekonomi Nelayan Artisanal di Pantai Utara Provinsi Jawa Barat

This study is a research about the socio-economic conditions of artisanal fishermen in the northern coast ofWest Java Province. The purpose of this study was to provide data about the characteristics of socio-economicconditions of fishermen, especially in Java island in the middle is still very limited studies on these themes inIndonesia. Total sample of this study 400 respondents artisanal fishing households in the northern coast of WestJava Province who are scattered in the districts of Cirebon, Indramayu, Subang, Karawang and Bekasi withtechniques for sampling random clusters. The findings of this study again confirms the condition of marginal socialand economic needs of fishermen who co-management in the field of fisheries with the involvement of variousstakeholders. The findings of this study can also contribute in providing a description of one of the stakeholdersbenefiting from the resources of the coastal artisanal fishermen. Keywords: Socio-economic, fishermen, management.

KEANEKARAGAMAN HAYATI SUMBER DAYA IKAN DI ESTUARI SEGARA ANAKAN, CILACAP JAWA TENGAH

Estuari Segara Anakan dikenal sebagai salah satu estuari yang potensial dan menjadi habitat penting dalam menyediakan ruang bagi beragam fauna akuatik, khususnya ikan. Penelitian ini bertujuan untuk mengetahui keanekaragaman sumber daya ikan di Estuari Segara Anakan. Penelitian dilakukan pada bulan Maret - Juni 2014. Pengambilan contoh dilakukan di 4 zona, yaitu mulut estuari, muara sungai, paparan laguna, dan alur sungai berhutan mangrove. Spesimen ikan dikumpulkan dengan alat tangkap jaring apong, jaring kantong, jaring tek tek (tram-mel net), surungan, dan widey. Ikan yang terkumpul sebanyak 23.521 ekor, terdiri atas 45 famili dan 87 spesies yang didominasi oleh famili Ambassidae, Engraulidae, Leognathidae, Mugilidae, Atherinidae, dan Bagridae. Berdasarkan habitat yang didiami, spesies terbanyak ditemukan di mulut estuari sebanyak 55 spesies, 53 spesies ditemukan di laguna, 54 spesies di muara sungai, dan 50 spesies di alur sungai berhutan mangrove, dan 22 spesies ditemukan diseluruh tipe habitat. Keberadaan juvenil ikan sebagai bagian dari komposisi terbesar dari spesies menunjukkan peran ekologis penting estuari sebagai daerah pemijahan, asuhan dan pembesaran, serta sumber makanan.