Spatial Modeling of Potential Lobster Harvest Grounds in Palabuhanratu Bay, West Java, Indonesia

Mutia Kamalia Mukhtar,Supriatna Supriatna,Liya Tri Khikmawati,Masita Dwi Mandini Manessa

doi:10.3390/fishes6020016

Mutia Kamalia Mukhtar, Supriatna Supriatna + Show 2 more

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https://doi.org/10.3390/fishes6020016

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Journal: Fishes	Publication Date: Apr 21, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: University of Indonesia, Universitas Jember

Abstract

Palabuhanratu Bay is a location in the southern part of Java Island with a high lobster population. Based on field observation, the lobster population in Palabuhanratu Bay is dominated by Panulirus homarus (green sand lobster), Panulirus versicolor (bamboo lobster), Panulirus penicillatus (black lobster), and Panulirus ornatus (pearl lobster). This study aimed to develop a spatial model using satellite-derived data to predict potential lobster harvest grounds in Palabuhanratu Bay. The Earth observational satellite data used were multispectral Landsat 8-SR imagery, and information about chlorophyll-a, salinity, total suspended solids (TSSs), sea surface temperature (SST), and distance from the coastline was extracted. Multiple linear regression was applied to build the prediction model, which was validated using 10-fold cross-validation. The result of the lobster harvest prediction model agreed with the root-mean-square error (RMSE) and adjusted R2 values of 0.326 and 0.708, respectively. The distribution of lobsters was strong at the following preferred ranges: chlorophyll-a: 1.1–1.7 mg/m3; salinity: 20.2–23.7 ppt; TSS: 40–56.4 mg/L; SST: 29.5–29.9 °C; and distance from the coastline: 500–4700 m. In this study, the habitats of four species of lobsters and their relationships with satellite-derived parameters were evaluated.

Highlights

Sukabumi Regency is a potential lobster-producing area in Indonesia, in the Palabuhanratu Bay area of West Java Island (Figure 1)
There were very strong relationships between lobster catches and the salinity and total suspended solids (TSSs) variables (Figure 5). This is because the level of salinity can affect the metabolic response of lobsters, which, in turn, affects their distribution, movement, and migration patterns [18]
The level of TSSs can affect the abundance of phytoplankton and water turbidity levels [31], and lobster habitats are located in turbid waters [1]

Summary

Introduction

Sukabumi Regency is a potential lobster-producing area in Indonesia, in the Palabuhanratu Bay area of West Java Island (Figure 1). According to the Director General of Indonesian Fishery Product Processing and Marketing, in 2014, 69.4% of Indonesia’s lobsters were exported to China and 22.6% were exported to Taiwan. These exports collectively weighed 3427 tonnes and were worth US$ 42.8 million [3]. Lobsters have been caught at several locations around the Palabuhanratu Bay area, including the waters of Cisolok, Karang Hawu, Karang De’et, Cimandiri, Sanggra Wayang, Jampang, and Karang Hantu. Palabuhanratu Bay is located in West Java Province, Indonesia, between the coordinates 06◦57 S, 106◦22 E and 07◦07 S, 106◦33 E. Palabuhanratu Bay is bordered by the Cisolok, Cikakak, Palabuhanratu, and Simpenan districts (Figure 1), and it is the largest bay along the southern coast of Java Island [5]

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