SETIAWAN, DANDI (2023) KARAKTERISTIK BIO-FISIK PANTAI SEBAGAI LOKASI PENELURAN PENYU LEKANG (Lepidochelys olivacea) DI PANTAI KALI RATU JOGOSIMO KEBUMEN (23dik356). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Dandi Setiawan. 26040119140187. Karakteristik Bio-Fisik Pantai sebagai Lokasi Peneluran Penyu Lekang (Lepidochelys olivacea) di Pantai Kali Ratu Jogosimo Kebumen Sri Redjeki dan Nur Taufiq Syamsudin Putra Jaya)
Populasi penyu lekang di alam mengalami penurunan diakibatkan oleh aktivitas manusia dan kerusakan alam. Keruskan alam mempengaruhi penyu dalam bereproduksi ataupun bertelur. Kerusakan alam berhubungan dengan karateristik bio-fisik pantai yang menjadi faktor penentu penyu bertelur. Pantai yang dijadikan tempat peneluran harus memenuhi faktor bio-fisik yang baik seperti mudah dijangkau dari laut, posisi sarang yang cukup tinggi, pasir pantai berukuran sedang, serta pantai bersifat landai. Penelitian ini bertujuan untuk mengetahui karakteristik bio-fisik pantai peneluran penyu di kawasan Pantai Kali Ratu, Jogosimo Kabupaten Kebumen. Karakteristik bio-fisik meliputi suhu pasir, struktur pasir, lebar pantai, kemiringan pantai, vegetasi pantai dan hewan predator. Karakteristik pantai dapat diketahui menggunakan metode survei serta pengumpulan data dilakukan dengan cara observasi secara langsung. Hasil penelitian karateristik bio-fisik Pantai Kali Ratu, meliputi: suhu pasir rata-rata 33,79oC dengan rata-rata pada pukul 07.00 sebesar 30,93oC; pukul 13.00 sebesar 35,14oC; dan pukul 19.00 sebesar 35,29oC; struktur pasir didominasi oleh pasir dengan kategori sedang (0,25-0,84 mm) dengan rata-rata presentase jenis pasir 97,59%; lebar pantai rata-rata 33,26 m dengan ratarata pada pukul 07.00 sebesar 30,19 m; pukul 13.00 sebesar 42,46 m; dan pada pukul 19.00 sebesar 27,13 m; kemiringan pantai rata-rata 1,99o pada pukul 07.00 sebesar 1,73o ; pukul 13.00 sebesar 2,91o ; dan pukul 19.00 sebesar 1,33o ; Vegetasi pantai yang ditemukan Eleusine indica, Ipomoea pas-caprae, Spinifex littoreus, Canavalia maritima, dan Cyperus maritima; dan hewan predator yang ditemukan burung camar, biawak, anjing, kepiting dan semut api. Berdasarkan hasil penelitian Pantai Kali Ratu memiliki karakteristik bio-fisik yang baik atau mendukung untuk tempat peneluran penyu lekang.
Kata kunci: Penyu lekang, Kerusakan alam, Karakteristik bio-fisik

ABSTRACT
(Dandi Setiawan. 26040119140187. Bio-Physical Characteristics of the Beach as a Nesting Location for the Lekang Turtle (Lepidochelys olivacea) in Kali Ratu Beach Jogosimo Kebumen. Sri Redjeki and Nur Taufiq Syamsudin Putra Jaya)
The olive ridley turtle population in nature has decreased due to human activities and natural damage. Natural damage affects turtles in reproducing or laying eggs. Damage to nature is related to the bio-physical characteristics of the beach which are the determining factors for turtle laying eggs. Beaches used as nesting sites must meet good bio-physical factors such as easy access from the sea, high enough nesting positions, medium-sized beach sand, and gently sloping beaches. Therefore, this study aims to determine the bio-physical characteristics of turtle nesting beaches in the Kali Ratu Beach area, Jogosimo, Kebumen Regency. Bio-physical characteristics include sand temperature, sand structure, beach width, beach slope, coastal vegetation and predatory animals. Coastal characteristics can be known using survey methods and data collection is done by direct observation. The results of the research on the bio-physical characteristics of Kali Ratu Beach include: an average sand temperature of 33.79oC with an average of 30,93oC at 07.00; at 13.00 at 35.14oC; and at 19.00 at 35.29oC; the sand structure is dominated by sand in the medium category (0.25-0.84 mm) with an average percentage of sand types of 97.59%; the average beach width is 33.26 m with an average at 07.00 of 30.19 m; at 13.00 at 42.46 m; and at 19.00 it was 27.13 m; the average beach slope is 1.99o at 07.00 at 1.73o ; at 13.00 at 2.91o ; and at 19.00 at 1.33o ; Coastal vegetation found Eleusine indica, Ipomoea pas-caprae, Spinifex littoreus, Canavalia maritimea, and Cyperus maritima; and predatory animals found in seagulls, monitor lizards, dogs, crabs and fire ants. Based on the research results, Kali Ratu Beach has good bio-physical characteristics or supports for olive ridley sea turtle nesting sites.
Keywords: Olive ridley turtle, Damage to nature, Bio-physical characteristics

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