SAFITRI, ANISA LINTANG (2023) ANALISIS KESUBURAN PERAIRAN BERDASARKAN SEBARAN KLOROFIL-A DAN SUHU PERMUKAAN LAUT DI PERAIRAN TEGAL, JAWA TENGAH (23dos56). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Anisa Lintang Safitri, 26050119130076, Analisis Kesuburan Perairan
Berdasarkan Sebaran Klorofil-A dan Suhu Permukaan Laut di Perairan Tegal, Jawa
Tengah. Azis Rifai dan Muhammad Zainuri).

Perairan Tegal memiliki peran strategis bagi sektor perikanan tangkap di
pesisir Pantura, terutama di wilayah Pantura Barat, namun mempunyai beban
jumlah kapal yang beroperasi cukup tinggi. Hal ini membutuhkan data potensi
perikanan untuk mendukung usaha penangkapan ikan secara efektif. Analisa
kesuburan perairan dapat digunakan untuk mendeteksi potensi perikanan.
Kesuburan perairan dapat ditentukan berdasarkan parameter klorofil-a dan suhu
permukaan laut (SPL). Penelitian ini bertujuan untuk menganalisa kesuburan
perairan di perairan Kota Tegal, Jawa Tengah berdasarkan distribusi klorofil-a dan
SPL. Penelitian ini menggunakan data klorofil-a dan suhu permukaan laut dari Citra
satelit SNPP VIIRS klorofil-a serta data SPL harian yang diunduh melalui situs
ocean color NASA http://www.oceancolor.gsfc.nasa.gov. Sedangkan data hasil
tangkapan ikan diperoleh dari pengukuran berat tangkapan ikan langsung di kapal
dan tempat pendaratan ikan. Penelitian juga menggunakan data pendukung berupa
data arah dan kecepatan angin yang diunduh melalui situs http://www.hycom.org.
Data klorofil-a dan suhu permukaan laut diolah menggunakan perangkat lunak
SeaDAS, dan selanjutnya dibuat peta sebaran menggunakan Quantum GIS (QGIS).
Hasil penelitian menunjukkan bahwa konsentrasi klorofil-a berkisar diantara
0.0853-1.4341 mg/m
3
, dengan arah persebaran menunjukkan tendensi menurun.
Sedangkan sebaran suhu permukaan laut menunjukkan kisaran nilai SPL antara
28.8-30°C. Hasil tangkapan ikan menunjukkan berat tangkapan berkisar diantara
162-390 kg. Peta sebaran klorofil-a dan sebaran suhu permukaan laut ditumpang
susunkan untuk mendapatkan sebaran kesuburan perairan. Data tangkapan ikan
selanjutnya diplot pada peta sebaran kesuburan untuk mendapatkan gambaran
potensi perikanan di perairan Tegal.

Kata kunci: klorofil-a, suhu permukaan laut, peta sebaran, tangkapan ikan,
perairan Tegal.

ABSTRACT

(Anisa Lintang Safitri, 26050119130076, Analysis of Water Productivity
Based on Chlorophyll-A and Sea Surface Temperature Distribution in Tegal
Waters, Central Java. Azis Rifai dan Muhammad Zainuri).

The Tegal waters has a strategic role in the capture fisheries sector on the
Pantura coast, especially in the West Pantura region, but also has a relatively high
capacity for fishing vessels operations. This requires fisheries’ potential data to
support fishing efforts effectively. Waters productivity can be used to detect fishery
potential. Waters productivity can be determined based on the parameters of
chlorophyll-a and sea surface temperature (SST). This study aims to analyze the
waters productivity in the waters of Tegal City, Central Java based on the
distribution of chlorophyll-a and SST. This research was conducted using
chlorophyll-a and sea surface temperature datas obtained from SNPP VIIRS
satellite images and daily SST data downloaded from the NASA ocean color website
(http://www.oceancolor.gsfc.nasa.gov). While the fish catched data were obtained
by measuring the weight of catched fish directly on the fishing ship and the fish
landing site. The research used wind direction and wind speed datas as supporting
data. These data were downloaded from http://www.hycom.org website.
Chlorophyll-a and sea surface temperature data were processed using the SeaDAS
software, to obtain its horizontal profiles. Horizontal distribution maps visualized
using Quantum GIS (QGIS) software. The horizontal distribution showed that the
distribution of chlorophyll-a concentrations ranged from 0.0853-1.4341 mg/m
3
,
with the direction of distribution showing a decreasing concentrations towards the
offshore waters. The horizontal distribution of sea surface temperatures showed a
ranged values between 28.8°C and 30°C. The fish catched data showed that the
weight of catched fishes were ranged from 162 kg to 390 kg. Thehorizontal
distribution maps of chlorophyll-a and sea surface temperature then be
superimposed to obtain the horizontal distribution of water productivity (water
productivity map). The fish catched data then plotted on the water productivity map
to showed the fishery potential area in Tegal waters.

Keywords: chlorophyll-a, sea surface temperature, distribution map, fish catches,
Tegal waters.

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