CLARITA, CLARA (2023) STUDI TENTANG KAITAN SUHU PERMUKAAN LAUT (SPL) DAN KLOROFIL-A TERHADAP KEMUNCULAN IKAN PARI MANTA DI SELAT BALI (23dos190). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Clara Clarita, 26050119140110, Studi Tentang Kaitan Suhu Permukaan Laut (SPL) dan Klorofil-a Terhadap Kemunculan Ikan Pari Manta di Selat Bali. Azis Rifai dan Muhammad Zainuri).
In Indonesia dikenal mempunyai 2 spesies ikan pari Manta (M. birostris dan M. alfredi) dan 5 spesies ikan pari Mobula (M. thrustoni, M. japanica, M. tarapacana, dan M. eregoodootenkee) dari 9 spesies pari Mobula yang ada di dunia. Keberadaan ikan pari Manta di Selat Bali diduga berkaitan dengan dua parameter utama yaitu suhu permukaan laut dan klorofil-a. Penelitian ini bertujuan untuk mengetahui variabilitas suhu permukaan laut, persebaran klorofil-a, dan estimasi kemunculan ikan pari Manta di Selat Bali. Penelitian dilakukan dengan menggunakan data suhu permukaan laut dan klorofil-a bulanan yang diunduh melalui situs ocean color NASA http://www.oceancolor.gsfc.nasa.gov. Sedangkan untuk data kemunculan ikan pari manta didapat dari Kementrian Kelautan dan Perikanan (KKP) Indonesia. Data suhu permukaan laut dan klorofil-a diolah menggunakan perangkat lunak SeaDAS yang selanjutnya untuk pembuatan peta sebaran dengan ArcGIS. Hasil penelitian menunjukkan variabilitas suhu permukaan laut dengan kisaran dari terdingin 23,243– 25,471 ℃ dan terhangat
30,463 – 32,179℃, persebaran klorofil-a dengan kisaran konsentrasi dari terendah 0,000 – 0,217 mg/L dan tertinggi 7,888 – 17,488 mg/L. Hasil pengamatan kemunculan ikan pari Manta ditemukan terendah 22 kali kemunculan dan terbanyak 66 kali kemunculan. Hasil analisis variabilitas suhu permukaan laut dan persebaran klorofil-a di Selat Bali menunjukkan bahwa karakteristik perairan selat Bali ideal bagi ikan pari Manta untuk bermigrasi dan tempat untuk mencari makan. Disimpulkan bahwa kemunculan ikan pari Manta berkaitan dengan variabilitas suhu permukaan laut dan persebaran klorofil-a.
Kata kunci: klorofil-a, Suhu Permukaan Laut, ikan pari Manta, ArcGIS, Selat Bali.

ABSTRACT
(Clara Clarita, 26050119140110, Study of the Relationship of Sea Surface Temperature (SST) and Chlorophyll-a to the Emergence of Manta Rays in the Bali Strait. Azis Rifai and Muhammad Zainuri).
Indonesia has been known by 2 species of Manta rays (M. birostris and M. alfredi) and 5 species of Mobula rays (M. thrustoni, M. japanica, M. tarapacana, and M. eregoodootenkee) of the 9 Mobula rays species in the world. The presence of Manta rays in the Bali Strait is thought to be related to two main parameters, namely sea surface temperature and chlorophyll-a. This study aims to determine the variability of sea surface temperature, distribution of chlorophyll-a, and estimation of the appearance of manta rays in the Bali Strait. The study was conducted using monthly sea surface temperature and chlorophyll-a data downloaded from NASA's Ocean Color website http://www.oceancolor.gsfc.nasa.gov. Meanwhile, data on the appearance of Manta rays was obtained from the Indonesian Ministry of Maritime Affairs and Fisheries (KKP). Sea surface temperature and chlorophyll-a data were processed using the SeaDAS software, which was then made a distribution map using ArcGIS. The results of the spatial analysis show the variability of sea surface temperature from cold temperatures with a range of 23.24 – 25.47 ℃ to warm temperatures with a range of 30.46 – 32.18 ℃, as well as the distribution of chlorophyll-a from low concentrations with a range of 0.000 – 0.217 mg/ L to high concentrations in the range of 7.888 – 17.488 mg/L. The results of observing the appearance of Manta
rays showed that the lowest occurrence was 22 times, while the highest occurrence was 66 times. Based on the results of an analysis of sea surface temperature variability and distribution of chlorophyll-a concentrations and the appearance of Manta rays in the Bali Strait, it shows that the characteristics of the Bali Strait
waters are ideal waters for Manta rays to migrate as well as a feeding ground. It was concluded that the presence of Manta rays was related to the variability of sea surface temperature and the distribution of chlorophyll-a.
Keywords: Chlorophyll-a, Sea Surface Temperature, Manta Rays, ArcGIS, Bali Strait.

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