Distribusi dan Performa Reprodukasi Kepiting Bakau Scylla oceanica di Ekosistem Mangrove Belawan Sumatera Utara.
DISTRIBUSI DAN PERFORMA REPRODUKSI KEPITING
BAKAU Scylla oceanica DI EKOSISTEM MANGROVE
BELAWAN SUMATERA UTARA
ABSTRAK
Distribusi dan Performa Reproduksi Kepiting Bakau Scylla oceanica di Ekosistem
Mangrove Belawan telah diteliti. Penelitian bertujuan untuk mengetahui distribusi
kepiting bakau S oceanica, mengetahui performa reproduksi kepiting bakau betina
dan mengetahui parameter biofisik kimia lingkungan yang paling berpengaruh
terhadap kelimpahan kepiting bakau S. oceanica. Kelimpahan kepiting bakau
dianalisa berdasarkan kelas ukuran dan jenis kelamin, distribusi kepiting bakau
menggunakan Indeks Distribusi Morisita dan tingkat kematangan gonad dengan
pengamatan visual pada bagian bawah abdomen. Hasil penelitian menunjukkan
distribusi kepiting bakau S. oceanica termasuk ke dalam pola distribusi
berkelompok. kepiting betina matang gonad tingkat 1, 2 dan 3 dijumpai pada tiap
stasiun, sedangkan kepiting betina matang gonad tingkat 4 hanya dijumpai pada
stasiun 2 dan 3. Hasil analisis korelasi menunjukkan bahwa parameter pH air
berpengaruh sangat nyata terhadap kelimpahan kepiting bakau.
Kata kunci: distribusi, performa reproduksi, S. oceanica.
Universitas Sumatera Utara
DISTRIBUSI DAN PERFORMA REPRODUKSI KEPITING
BAKAU Scylla oceanica DI EKOSISTEM MANGROVE
BELAWAN SUMATERA UTARA
ABSTRACT
The Distribution and Reproduction Performance of Mangrove Crab Scylla
oceanica in Belawan Mangrove Ecosystem has been studied. The research
objective is to determine distribution of mangrove crab S oceanica; determine
female crab reproduction performance, and to determine the biophysicalchemistry parameters which is the most responsible for the survival of mangrove
crab S. oceanica. The abundance of mangrove crab abundance were analyzed
based on class of size and sex, the distribution of mangrove crabs is analysed
distribution index, and the level of gonad maturity with visual observations at the
bottom abdomen. The research show that the distribution of S. oceanica is
catagorized as clumped distribution pattern, gonad maturity female crab levels 1,
2 and 3 found in all station, but gonad maturity female crab level 4 only found in
station 2 and 3. Correlation analysis show that water pH is clearly effected the
abundance on mangrove crab.
Keyword: distribution, reproduction performance, S. oceanica
Universitas Sumatera Utara
BAKAU Scylla oceanica DI EKOSISTEM MANGROVE
BELAWAN SUMATERA UTARA
ABSTRAK
Distribusi dan Performa Reproduksi Kepiting Bakau Scylla oceanica di Ekosistem
Mangrove Belawan telah diteliti. Penelitian bertujuan untuk mengetahui distribusi
kepiting bakau S oceanica, mengetahui performa reproduksi kepiting bakau betina
dan mengetahui parameter biofisik kimia lingkungan yang paling berpengaruh
terhadap kelimpahan kepiting bakau S. oceanica. Kelimpahan kepiting bakau
dianalisa berdasarkan kelas ukuran dan jenis kelamin, distribusi kepiting bakau
menggunakan Indeks Distribusi Morisita dan tingkat kematangan gonad dengan
pengamatan visual pada bagian bawah abdomen. Hasil penelitian menunjukkan
distribusi kepiting bakau S. oceanica termasuk ke dalam pola distribusi
berkelompok. kepiting betina matang gonad tingkat 1, 2 dan 3 dijumpai pada tiap
stasiun, sedangkan kepiting betina matang gonad tingkat 4 hanya dijumpai pada
stasiun 2 dan 3. Hasil analisis korelasi menunjukkan bahwa parameter pH air
berpengaruh sangat nyata terhadap kelimpahan kepiting bakau.
Kata kunci: distribusi, performa reproduksi, S. oceanica.
Universitas Sumatera Utara
DISTRIBUSI DAN PERFORMA REPRODUKSI KEPITING
BAKAU Scylla oceanica DI EKOSISTEM MANGROVE
BELAWAN SUMATERA UTARA
ABSTRACT
The Distribution and Reproduction Performance of Mangrove Crab Scylla
oceanica in Belawan Mangrove Ecosystem has been studied. The research
objective is to determine distribution of mangrove crab S oceanica; determine
female crab reproduction performance, and to determine the biophysicalchemistry parameters which is the most responsible for the survival of mangrove
crab S. oceanica. The abundance of mangrove crab abundance were analyzed
based on class of size and sex, the distribution of mangrove crabs is analysed
distribution index, and the level of gonad maturity with visual observations at the
bottom abdomen. The research show that the distribution of S. oceanica is
catagorized as clumped distribution pattern, gonad maturity female crab levels 1,
2 and 3 found in all station, but gonad maturity female crab level 4 only found in
station 2 and 3. Correlation analysis show that water pH is clearly effected the
abundance on mangrove crab.
Keyword: distribution, reproduction performance, S. oceanica
Universitas Sumatera Utara