Hutan mangrove merupakan salah satu ekosistem alami yang memberikan kontribusi besar terhadap organisme perairan sebagai sumber makanan salah satunya yaitu gastropoda. Tujuan dari penelitian ini untuk mengetahui kerapatan mangrove, kelimpahan gastropoda dan korelasi antara kerapatan mangrove dengan kelimpahan gastropoda. Penelitian ini dilaksanakan pada bulan September – November 2018 di daerah perluasan 12 ha KKMB. Metode penelitian yang digunakan yaitu metode survei dengan melakukan pengamatan secara langsung pada 12 titik plot dengan ukuran plot 10 x 10 meter dimana dalam setiap plot tersebut didirikan 3 sub plot berukuran 1 x 1 meter yang dilakukan secara acak didalam plot untuk mengambil sampel gastropoda. Data yang terkumpul dikelompokkan berdasarkan jenis variabel, kerapatan mangrove sebagai variabel (X) dan kelimpahan gastropoda sebagai variabel (Y). Hasil penelitian menunjukkan bahwa kerapatan mangrove di daerah perluasan KKMB termasuk dalam kategori sangat padat (baik) dengan nilai 11.700 ind/ha. Kelimpahan gastropoda tertinggi di dominasi oleh jenis Cassidula aurisfelis dengan jumlah 79 individu dan kelimpahan terendah jenis Littoraria scabra dengan jumlah 14 individu. Rendahnya tingkat kelimpahan gastropoda diduga karena kerapatan jenis mangrove rendah dan kurangnya sumber makanan di area mangrove. Hubungan kerapatan mangrove dengan kelimpahan gastropoda menggunakan analisis regresi linier sederhana diperoleh nilai koefesien determinasi (R2) sebesar 0,227, sedangkan nilai koefesien korelasi sebesar 0,4766 yang berarti berkorelasi positif.
Kata Kunci: Korelasi, Kerapatan Mangrove, Gastropoda, KKMB

Mangrove forests are one of the natural ecosystems that make a large contribution to the population as a food source, one of which is gastropods. The purpose of this study was to determine the density of mangroves, the abundance of gastropods and the discussion between the density of mangroves and the abundance of gastropods. This research was carried out in September - November 2018 in the area of 12 ha KKMB. The research method used was a survey method by conducting direct research on 12 plot points with a plot size of 10 x 10 meters were in each plot there were 3 sub-plots made 1 x 1 meter randomly carried out in the plot to take gastropod samples. The collected data are grouped by type variable, mangrove density as a variable (X) and gastropod abundance as a variable (Y). The results showed that the mangrove yields in the area obtained by KKMB belonged to the very solid (good) category with a value of 11.700 ind / ha. The highest gastropod abundance is dominated by the type of Cassidula aurisfelis with the number of 79 individuals and the lowest abundance of the type Littoraria scabra with the number of 14 individuals . The low level of gastropod abundance is reduced due to the low density of mangrove species and the low food source in the mangrove area. The relationship of mangrove density with gastropod abundance using simple linear regression analysis obtained the value of determination coefficient (R2) of 0.227, while the coefficient value was 0.4766 which means that it is positively correlated. Keywords: Correlation, Density Mangrove, Gastropod, KKMB