Tradisi petik laut sering juga disebut dengan larung sesaji yang dikaitkan dengan syukuran para nelayan atas segala hal yang telah diberikan oleh laut. Saat ini petik laut telah mengalami transformasi menjadi ajang pesta rakyat, namun sejatinya ritual petik laut ini merupakan ekspresi spiritualitas komunitas nelayan pesisir di Jawa dan Madura. Untuk menjaga salah satu kearifan lokal tersebut maka perlu dilakukan kajian yang komprehensif mengenai tradisi petik laut dalam tinjauan sains dan Islam. Secara spesifik, penelitian ini bertujuan untuk mengetahui pengaruh bacaan Al-Quran pada pertumbuhan mikroorganisme atau bakteri air laut. Hal ini dikarenakan mikroorganisme atau bakteri merupakan salah satu aktor yang berperan penting dalam sistem kelautan yang selanjutnya akan mempengaruhi produktivitas perairan dan hasil tangkap. Pengambilan sampel air laut yang digunakan dalam penelitian ini adalah air laut di pesisir Sidoarjo. Sampel diambil pada permukaan air laut sejauh 100 meter dari bibir pantai dan dilakukan sekali untuk semua sampel. Analisa pertumbuhan mikroorganisme air laut dilakukan di laboratorium mikrobiologi. Perlakuan yang diberikan adalah dibacakan (1) surat an-Nahl, (2) al-Fatihah, dan (3) tanpa perlakuan (kontrol). Sampel pengontrol (pre-test/baseline) dan sesudah perlakuan (post test) ditumbuhkan dalam media NA dengan teknik Total Plate Count (TPC) di laboratorium. Penghitungan jumlah bakteri dengan menggunakan colony counter dilakukan setelah diinkubasi selama 24 jam. Data hasil pengamatan jumlah koloni bakteri akan diuji dengan dengan menggunakan dua variabel yaitu perlakuan dan hari. Hasil analisa statistik dengan menggunakan analisis non-parametrik uji Friedman menunjukkan bahwa besaran nilai Chi Square = 30.545 dan asymp sig sebesar 0.000. Hasil tersebut menunjukkan bahwa ketiga perlakuan (dibacakan surat an-Nahl, al-Fatihah dan tanpa perlakuan (kontrol)) memberikan reaksi yang berbeda dengan jumlah nilai TPC atau pertambahan koloni bakteri air laut.

The The waters of Raja Ampat have a healthy coral reef ecosystem and a wide variety of species so it has a high abundance of coral reef fish. One of the indicators of fertility level in water is chlorophyll-a and its high and low are influenced by sea surface temperature. The purpose of this study was to determine the relationship between chlorophyll-a content and sea surface temperature using satellite imagery data on the community structure of reef fish in the waters of SAP Raja Ampat. The coral reef fish data collection method used UVC (Underwater Visual Census) while the chlorophyll-a content and sea surface temperature used spatial analysis. The results showed that the reef fish diversity index value was 4,1 - 4,6 in the high category, uniformity 0,88-0,96 in the high category, dominance 0,014 - 0,026 in the low category, for abundance 244.340 ind/ha – 403.520 ind/ha and biomass 131,45 kg/ha - 204 kg/ha. The chlorophyll-a content obtained was 0,366 mg/m3 – 0,511 mg/m3 and the sea surface temperature obtained was 30,717°C – 31,899°C. The results of the relationship of reef fish community structure with chlorophyll-a content and sea surface temperature do not have a significant correlation.

Kranji waters have potential fishing grounds for the development of large marine fisheries. Kranji fishermen often face obstacles in their fishing efforts due to a lack of information about the season and potential fishing areas. The oceanographic factor of the waters can be one of the clues to determining a good catch. The purpose of this study was to determine the condition of the oceanographic parameters of the fishing area, determine the catch rate and determine the correlation of oceanographic parameters to the catch of ring trawlers. The data used in this study were temperature, salinity, depth, current velocity and catch for 10 fishing trips. Oceanographic parameters in the Kranji fishing area for 10 fishing trips were as follows: temperature ranged from 29.9- 31.8°C, water salinity ranged from 29-31.1‰, water depth ranges from 50-70 m and the current velocity ranges from 0.09to 0.34 m/s. The variability of ring trawl production during 10 times of capture found 5 species caught. The variability and composition of purse seine catches were as follows: Tongkol Walang with a percentage of 54.42%, Tongkol Lorek with a percentage of 38.13%, belo fish with a percentage of 6.37%, juwi with a percentage of 0.53%, and the lowest. the percentage is bagong by 0.52%. The correlation of oceanographic parameters with purse seine catches is as follows: Current velocity has the highest correlation value with a correlation coefficient of 0.814. The temperature has a strong category value with a correlation coefficient of 0.756. Salinity has a negative correlation value with a value of -0.658. Depth has a strong category value with a correlation coefficient value of 0.657.

Keberadaan industri pengolahan tepung ikan yang beroperasi di bantaran Sungai Kalimireng, Kecamatan Manyar, Kabupaten Gresik dimungkinkan dapat menimbulkan permasalahan lingkungan akibat resiko pencemaran limbah cair pengolahan tepung ikan. Penelitian ini bertujuan menganalisis kualitas Sungai Kalimireng di

The sustainable use of estuary areas is needed to maintain the sustainability.  The purpose of this research is to know the relationship of water quality with ecological index of aquatic biota in The Permata Pilang Beach Estuary Area, Probolinggo.  The method used is survey with data analysis Principal Component Analysis. The results of showed that the temperature was 31.5-33.6°C, pH of 8.1-8.2, salinity of 1.6-32.1 ppt, DO of 11.1 – 11.8 mg/L, and water transparency of 0.5-1 meters.  The grain size of the sediment is dominated by the fine sand. Found 20 species of macrozoobenthos which consisted of 10 species of gastropods and 10 species of bivalve. Fish community structure found 3 fish species (Chanos chanos, Mugil cephalus, Acentrogobius audax). The results of PCA analysis, it was found that the diversity of macrozoobenthos has a positive relationship with temperature and pH.  The evenness of macrozoobenthos has a positive relationship with temperature, the dominance of macrozoobenthos has a positive relationship with salinity, pH, DO and water transparency. Fish diversity and evenness had a positive relationship with temperature and DO. Fish domination index has a positive relationship with salinity, pH and water transparency.