ASPEK PERTUMBUHAN UNDUR-UNDUR LAUT, Emerita emeritus DARI PANTAI BERPASIR KABUPATEN KEBUMEN

Ali Mashar dan Yusli Wardiatno

Abstract


ABSTRAK
Undur-undur laut merupakan bagian dari kelompok krustasea yang menghuni pantai berpasir
di daerah intertidal.Undur-undur laut mempunyai fungsi ekonomi dan ekologi.Salah satu jenis
undur-undur laut yang banyak dijumpai di Indonesia adalah jenis Emerita emeritus.Mengingat
pentingnya fungsi ekonomi dan ekologi undur-undur laut, maka kajian tentang pola
pertumbuhan undur-undur laut penting dilakukan sebagai dasar untuk mengelola pemanfaatan
undur-undur laut secara lestari.Penelitian ini dilakukan di Pantai Bocor, Kecamatan
Buluspesantren, Kabupaten Kebumen.Pengambilan sampel undur-undur laut dilakukan setiap
bulan dari bulan Maret hingga Mei 2012.Pengambilan sampel undur-undur laut dilakukan
dengan metode penyapuan dengan bantuan alat tangkap sorok pada daerah pantai berpasir
yang terpengaruh gerakan gelombang (swash zone).Hasil penelitian menunjukkan bahwa
undur-undur laut Emerita emeritus yang tertangkap mempunyai kisaran panjang karapas
antara 19 mm hingga 34 mm, dengan ukuran yang paling banyak tertangkap pada selang
panjang 29-30 mm. Undur-undur laut di lokasi penelitian didominasi oleh undur-undur laut
betina dengan nisbah kelamin jantan/betina adalah 0,246.Pola pertumbuhan undur-undur laut
Emerita emeritus jantan adalah isometrik, sedangkan undur-undur laut betina adalah
alometrik negatif.Secara keseluruhan, pola pertumbuhan undur-undur laut Emerita emeritus
adalah alometrik negatif. Artinya pertumbuhan panjang undur-undur laut lebih cepat
dibanding pertumbuhan bobotnya
Kata kunci: Emerita emeritus, pantai berpasir, undur-undur laut, selatan Jawa

ABSTRACT
Mole crab is one of crustaceans inhabiting sandy intertidal. The crabs has both ecological and
economical significance role. One common mole crab found in Indonesia is Emerita emeritus.
Due to its ecological and economical function of the crab, it is neede to study the population
growth pattern for biological information based sustainable management. The research was
conducted in Pantai Bocor, Kecamatan Buluspesantren, Kabupaten Kebumen. Sample
collections were done monthly during March – May 2012. Sampling was done by swep area
method by means of local fishermen gear called sorok along swash zone. The results showed
that the carapace length of collected crabs ranged from 19 – 34 mm, with the highest
abundance within range of 29 – 30 mm. In terms of sex, female were the dominant with sex
ratio beween male and female was 0.246. The growth pattern of male was isometric, while in
female it was negative allometric. However, combining data showed that the growth patern of
the population was negative allometric; meaning that its length grows faster than its weight.
Keywords: Emerita emeritus, sandy beach, mole crab, southern part of Jawa


Full Text:

PDF


DOI: http://dx.doi.org/10.29303/jbt.v13i1.70

Refbacks

  • There are currently no refbacks.


Indexed by