Studi ini bertujuan untuk mengkaji biodiveristas ikan dan beberapa dinamika terkait seperti karakteristik habitat, komposisi dan keragaman komunitas, status IUCN red list dan kemanfaatan. Penelitian dilakukan pada daerah hulu Sungai Sambas dan Danau Kurapan Desa Sepantai Kalimantan Barat. Untuk menghimpun data potensi biodiversitas ikan dilakukan pengamatan karakteristik habitat perairan, pengumpulan sampel ikan yang akan menggambarkan komposisi dan keragaman ikan serta penyusunan daftar status IUCN red list dan kemanfaatannya. Hasil sampling ikan selama penelitian didapatkan 152 individu yang berasal dari 124 (81.58%) dan 28 (18.42%) ekor masing-masing hasil tangkapan hulu Sungai Sambas dan Danau Kurapan tergabung dalam 22 spesies dan 13 famili. Analisis IUCN Red List ikan menunjukkan tiga kategori yaitu belum dievaluasi (NE) ada 6 spesies (27%), berisiko rendah (LC) ada 6 spesies (27%) dan belum terbaca ada 10 spesies (46%). Sedangkan potensi ikan yang terkoleksi menunjukkan 2 spesies (9%) berpotensi sebagai ikan hias, 3 spesies (14%) berpotensi sebagai ikan konsumsi dan 17 spesies (77%) berpotensi sebagai ikan hias dan juga ikan konsumsi yang secara keseluruhan merupakan spesies alami (native species) asli Indonesia. Spesies ikan yang memiliki distribusi spasial tertinggi adalah Bagrichthys sp, Kryptopterus sp, Ceratoglanis scleronema dan Mystus sp pada hulu Sungai Sambas dan Parachela sp dan Osteochilus kapenii pada Danau Kurapan. Dalam rangka mempertahankan atau menjaga agar biodiversitas iktiofauna tetap lestari, maka hal yang perlu dilakukan adalah: (1) Penetapan kawasan konservasi perairan; (2) Pembatasan jenis alat tangkap; (3) Peningkatan kapasitas kelompok masyarakat, dan; (4) Peningkatan ekonomi kreatif masyarakat.

Environmental DNA (eDNA) methods are increasingly viewed as alternate or complementary approaches to conventional capture-based surveys for marine conservation and fisheries management purposes, especially at large spatial scales in mega-biodiversity regions such as Indonesia. Decapod crustacean distribution and diversity across Indonesia are still poorly known, even for economically important fisheries commodities. This study assessed coral reef associated decapod diversity and distribution by sampling 40 sites in three regions (West, Central, East), representing 17 provinces and 10 Fisheries Management Areas (FMAs) across Indonesia, with a special focus on the blue swimming crab Portunus pelagicus. DNA sequencing (Illumina iSeq100) data were analysed in mBRAVE (Multiplex Barcode Research And Visualization Environment) yielded 406 OTUs belonging to 32 families, with 47 genera and 51 species identified. The number of families identified was highest in the Central region (25), while the most genera (31) and species (36) were identified in the West region. Alpha diversity did not differ significantly between regions or provinces, while Beta diversity differed significantly between provinces but not between regions. Our results also showed 31 species are possibility native based on the distribution meanwhile 12 species do not appear to have been recorded based of SeaLifeBase or WorMS. While providing a reference for further exploration of Indonesian coastal and small island decapod biodiversity, the high proportion of unidentified taxa calls for concerted efforts to develop and maintain reference specimen and sequence repositories and expand species conservation status assessments. The economically important decapod crustaceans identified in this study included three crabs (Charybdis anisodon, Charybdis japonica, Portunus pelagicus), a freshwater prawn (Macrobrachium nipponense), a lobster (Panulirus stimpsoni) and two penaeid shrimps (Mierspenaeopsis hardwickii and Trachysalambria aspera). For most decapod taxa, observed patterns indicate management under existing provincial and/or FMA level management structures is appropriate. Furthermore, the data can inform science-based fisheries management strategies, in particular for P. pelagicus.

Sungai Buaya merupakan salah satu sungai di Pulau Bunyu yang di sekitarnya terdapat aktivitas pemukiman, pertanian, dan perikanan (penampungan dan pengolahan hasil tangkapan ikan) serta sebagai tempat sandaran kapal nelayan dan transportasi laut. Aktivitas tersebut akan menghasilkan bahan pencemar yang berbeda dan masuk ke sungai baik secara langsung maupun tidak langsung. Bahan pencemar yang masuk ke sungai akan mempengaruhi kualitas air dan menyebabkan terjadinya penurunan kualitas air apabila terjadi secara terus menerus tanpa kontrol terhadap sumber bahan pencemar. Salah organisme yang terpengaruh oleh penurunan kualitas air adalah makrozoobentos. Penelitian ini bertujuan untuk mengetahui keanekaragaman makrozobentos di Sungai Buaya. Penelitian dilaksanakan pada bulan Agustus-Oktober 2013. Pengambilan sampel sedimen dan makrozoobentos menggunakan Eckman Grab. Sampel sedimen diambil sebanyak ± 500 gram dan dimasukan ke dalam kantong plastik. Sedangkan sampel makrozoobentos dipisahkan dari sedimen menggunakan saringan ukuran mata saring 0,5 mm. Sampel yang tersaring diawetkan dengan formalin 5%. Analisis struktur komunitas makrozoobentos dilakukan dengan menentukan komposisi (kepadatan), keanekaragaman (H’), keseragaman (E), dominansi (C). Struktur komunitas makrozoobentos memperlihatkan nilai indeks keanekaragaman yang rendah. Nilai indeks keseragaman tergolong tinggi dan indeks dominansi tergolong rendah. Tidak ada dominansi spesies di perairan Sungai Buaya. Makrozoobentos yang ditemukan selama penelitian terdiri dari 4 kelas yaitu Bivalva (1 jenis), Gastropoda (13 jenis), Crustacea  (1 jenis), dan Polichaeta (2 jenis).

Giant prawns are one of the leading commodities of the people of Sambas Regency. From a socio-cultural perspective, catching giant prawns has been going on for a long time and until now it has become a habit and a hobby which has even become an international event that is packaged in the form of a fishing competition. Indirectly, the giant prawn business expands and plays a role in moving other sectors, such as the tourism sector, either in the form of tours or culinary. Catching giant prawns in Sambas Regency is already intensive because it only depends on the fishing sub-sector and lasts all year round. This study aims to predict the current status of giant prawn resources in various dimensions in order to formulate strategic policies in sustainable management. Based on the results of the RAPFISH analysis on each dimension of sustainability, it can be concluded that the sustainability status of giant prawn (Macrobrachium rosenbergii) resource management in Sambas Regency, West Kalimantan, has a sustainability index value of 45.34. Sustainability status is in less sustainable condition or poor management status. The highest sustainability index value is found on the social dimension and the lowest on the institutional dimension. Of the five dimensions of sustainability, the social and ecological dimensions show results that are still supportive for the sustainability of the giant prawn (Macrobrachium rosenbergii) resource management in Sambas Regency, West Kalimantan. And the other three dimensions must be given special attention because the sustainability dimension has an impact on the sustainability of management with a less sustainable status or poor management status. Especially on the institutional dimension, it should be an evaluation for local governments. Based on the facts on the ground, there is no real formal institution in catching giant prawns, unlike fishing groups or other fish farming groups. That's why it is believed that in planning the development of fishing groups or fishing for giant prawns, it is currently impossible to do. So that in the future a formal regulation from the local government is needed regarding the business actors of catching giant prawns in Sambas Regency.