Abstract. Hastuti AR, Lumbanbatu DTF, Wardiatno Y. 2019. The presence of microplastics in the digestive tract of commercial fishes off Pantai Indah Kapuk coast, Jakarta, Indonesia. Biodiversitas 20: 1233-1242. Microplastics in fishes have been reported in many studies due to their threat to marine fishes and human health. But only a few data exist on commercial fish for human consumption in Indonesia. This study revealed the presence of microplastics in the digestive tract of 9 commercial species collected from six sites along the Pantai Indah Kapuk coast. Ingested microplastics were identified using gut content analysis. Microplastic particles were counted and categorized by type, color, and size. 169 of 174 (97.13%) of examined fish had microplastics. A total of 2063 microplastic particles were collected with the average number of particles per individual of 12.21 ± 9.76. The highest number (20.0 ± 8.0 particles individual-1) was found in Sardinella fimbriata and the lowest one (4.9 ± 4.7 particles individual-1) was found in Oreochromis mossambicus. Majority of ingested particles were fibers (89.63%), followed by fragments (6.24%), films (4.13%) and no pellets were observed. In terms of color, the most abundant were transparent particles (79.20%), followed by blue (7.03%), red (3.54%), black (2.86%), green (2.71%), and others which were found in low number. The highest number of fibers by size was <20-100 µm (55.03%), films were 100 - 1000 µm (33.93%), and fragments were <100 µm (25.25%). Microplastics ingested per individual in each species were not correlated to total body length, total body weight, digestive tract length, digestive content weight, mouth height, and mouth length.

<p>Aktivitas industri di perairan Segara Anakan dan Sungai Donan dapat menghasilkan limbah berupa logam berat, yang dapat membahayakan lingkungan perairan. Penelitian ini bertujuan untuk menganalisis residu logam berat Pb, Hg, Cu dan Cd pada daging kerang totok (<em>Geloina erosa</em>) yang diambil dari 2 stasiun, melihat hubungan bobot total kerang dengan residu logam berat dalam daging kerang dan menetapkan batas aman konsumsi daging kerang bagi masyarakat. Pengukuran kandungan logam berat dilakukan menggunakan AAS (<em>Atomic Absorption Spectrophotometer</em>). Hasil pengukuran residu logam Pb, Hg, Cu dan Cd dalam daging kerang totok yaitu 0,005-0,145 mg/kg, &lt;0,002 mg/kg, 0,209-2.374 mg/kg, dan 0,0050,152 mg/kg yang mengindikasikan bahwa residu logam berat dalam<br />daging dibawah ambang batas yang telah ditetapkan. Hubungan bobot total<br />kerang dengan residu logam berat dalam daging ialah negatif. Hasil perhitungan batas maksimum konsumsi kerang totok yaitu 5,3-228,8 g/minggu (dewasa) dan 1,6-68,6 g/minggu (anak-anak).</p><p> </p>

The exploitation of sandfish (Holuthuria scabra) in Saleh Bay is so far not well managed. Consequently, over-fishing and species extinction of sea cucumbers emerge. Currently, information related to the supply of sandfish (H. scabra) is very limited. The purpose of this research was to investigate the stock status of sandfish (H. scabra) based on the fishermen’s perception and fish capture information. This research was carried out in the Saleh Bay coast, Sumbawa District, West Nusa Tenggara. The method used was a semi-closed interviews with the scope of fishermen’s demography, methods, efforts and catches, and fishermen’s perception of the stock condition, conducted by a total of 39 respondents. The result of this research showed that sea cucumber fishermen consisted of male and female with a ratio of 46 : 54, age ranged between 26-59 years old, all were married; education level between unschooled to senior high school; fishermen were from Bajo tribe (37%), Bugis (25%), Samawa (5%) and Mandar (33%). Sea cucumbers were caught by hands for 5-6 weeks (1-4 hours per day), CPUE ranges between 2 to 25 kg (wet weight). The main reason for capturing sea cucumber was because of the ease of method (97%). 84% of the fishermen stated that sea cucumber stock in Saleh Bay declined. The research cocluded the fishermen on Saleh Bay assumed that sandfish (H. scabra) had decreased in stock.AbstrakEksploitasi teripang pasir (Holuthuria scabra) di perairan Teluk Saleh terus dilakukan tanpa adanya pengelolaan sehingga memacu terjadinya kelebihan tangkap dan bahkan bisa menyebabkan kepunahan spesies teripang pasir. Kurangnya ketersediaan informasi dan data terkait stok menyebabkan sulitnya pengelolaan teripang pasir (H. scabra) di perairan Teluk Saleh ke depannya. Tujuan dari penelitian ini adalah untuk mengetahui staus stok teripang pasir (H. scabra) berdasarkan persepsi nelayan dan gambaran hasil tangkapan. Lokasi penelitian yaitu di pesisir wilayah perairan Teluk Saleh, Kabupaten Sumbawa, Nusa Tenggara Barat. Metode yang digunakan ialah wawancara semi tertutup dengan menggunakan kuesioner. Aspek yang dikaji dalam wawancara terdiri dari : 1) demografis nelayan; 2) metode, upaya dan hasil tangkap serta 3) persepsi nelayan terhadap kondisi stok. Responden dalam penelitian ini ialah nelayan penangkap teripang yang berada di pesisir Teluk Saleh. Jumlah responden adalah 39 orang. Hasil penelitian menunjukkan bahwa penangkap teripang pasir terdiri dari laki-laki dan perempuan dengan rasio 46 : 54%, usia berkisar antara 26-59 tahun, nelayan berstatus telah menikah, tingkat pendidikan nelayan mulai dari tidak bersekolah hingga SMU, nelayan berasal dari suku Bajo (37%), Bugis (25%), Samawa (5%) dan Mandar (33%). Penangkapan teripang dilakukan menggunakan tangan, penangkapan dilakukan 5-6 minggu-1 (1–4 jam hari-1), CPUE ialah 2 hingga 25 kg (berat basah), alasan utama nelayan (97%) menangkap teripang pasir adalah kemudahan metode penangkapan, 84% nelayan menyatakan bahwa stok teripang pasir di Teluk Saleh mengalami penurunan. Kesimpulan dari penelitian ialah sebagian besar nelayan Teluk Saleh menganggap bahwa teripang pasir (H. scabra) telah mengalami penurunan stok.

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