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POLA DISTRIBUSI DAN KEPADATAN POPULASI Geloina sp DI KAWASAN MANGROVE KKMB KOTA TARAKAN

MUHAMMAD YUSUF IBRAHIM

2025•Skripsi, Thesis, Disertasi, dan Tugas Akhir

Pulau Tarakan, Kalimantan Utara, memiliki ekosistem mangrove yang menjadi habitat penting bagi berbagai biota, salah satunya Geloina sp yang mampu beradaptasi terhadap fluktuasi salinitas dan memanfaatkan bahan organik dari serasah mangrove. Penelitian ini bertujuan menganalisis pola distribusi, kepadatan, serta hubungan panjang-berat Geloina sp sebagai dasar pengelolaan ekosistem mangrove berkelanjutan. Penelitian dilaksanakan dari bulan Maret-Mei 2025 menggunakan metode deskriptif kuantitatif dengan Teknik purposive sampling pada tiga area mangrove 9 ha (depan, tengah, dan belakang) dengan 30 plot transek kuadrat berukuran 5×5 m dan jarak antar area 30 m. Sampel dikumpulkan saat surut untuk menghitung kepadatan (ind/m²), pola distribusi dengan indeks Morisita, distribusi frekuensi ukuran cangkang, serta hubungan panjang-berat individu. Hasil penelitian menunjukkan vegetasi mangrove didominasi Rhizophora sp. dan Avicennia sp., dengan kepadatan tertinggi pada area depan (0,88 ind/m², 22 individu), diikuti area belakang (0,60 ind/m², 15 individu) dan tengah (0,48 ind/m², 12 individu). Hasil perhitungan Indeks Morisita (I = 0.9) menunjukkan bahwa pola distribusi Geloina sp di kawasan mangrove KKMB Kota Tarakan bersifat merata/seragam. Sebagian besar individu berukuran sedang (5,59–6,31 cm), dan hubungan panjang-berat mengikuti persamaan W = 0,3532·L³·¹⁹⁵⁷ (R² = 0,9041), menunjukkan pertumbuhan alometrik positif. Ekosistem mangrove KKMB mendukung keberadaan Geloina sp., namun kepadatannya masih rendah sehingga perlu pengelolaan berkelanjutan untuk meningkatkan populasi dan menjaga habitatnya.

Kata kunci : Pengelolaan berkelanjutanGeloina SpKonservasi KKMBEkosistem mangrove.

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ThesisOpen AccessPDF tersedia

PENGARUH PENGGUNAAN NUMBERED HEAD BERSAMA TERHADAP PEMAHAMAN MEMBACA SISWA KELAS II SMP NEGERI 1 TARAKAN

MUHAMMAD YUSUF IRFAN DANA

2021•Skripsi, Thesis, Disertasi, dan Tugas Akhir

THE EFFECT OF USING NUMBERED HEADS TOGETHER ON READING COMPREHENSION OF SECOND GRADE STUDENTS OF SMP NEGERI 1 TARAKAN Abstract This study aimed to determine whether the use of Numbered Heads Together (NHT) was effective in teaching reading comprehension on recount texts to the eight graders at the SMP Negeri 1 Tarakan. This study used a pre – experimental design. The population of this study were all the eighth grade students at the school. The total population was 352 students and the sample was the class VIII2 which consisted of 32 students. The samples were taken using a purposive sampling technique. The stages in this research were pre-test, treatment and post-test. At the pre-test stage, students were asked to answer the given test. After the pre-test, the researcher give treatments. The experimental class was taught using NHT. After being given the treatment, the students were asked to answer the test given at the post-test satge. The result of the study showed that there was a difference in the mean score between the pre-test (M = 53.38) and the post-test (M = 77.06), with an increase by 23.68. the result of paired sample t-test showed that the p-value was smaller than the level of significant (0.000 0.05), indicating that the alternative hypothesis (Ha) was accepted and null hypothesis (H0) was rejected. Thus, there was a significant effect of using NHT in teaching reading comprehension on recount texts to the eighth grader students at the SMP Negeri 1 Tarakan.

Keywords: Numbered Heads TogetherReading ComprehensionRecount Texts

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