35 PENGARUH EKSTRAK BIJI BUAH KEBEN (Barringtonia asiatica) DALAM PROSES IMOTILISASI PADA TRANSPORTASI SISTEM TERTUTUP BENIH IKAN KAKAP PUTIH (Lates calcarifer) Thia Monica, Tri Yusufi Mardiana, Linayati Program Studi Budidaya Perairan, Fakultas Perikanan Universitas Pekalongan ABSTRACT The research aim to determine effect of keben fruit extract can be used as an anesthetic for Sea bass and knowing concentration of keben fruit extract in stunning process which gave highest survival of Sea bass seeds. Experimental method was used in this research with completely randomized design (CRD) consisting of 5 treatments of doses : 0 mg / l; 5 mg / l; 10mg / l; 15 mg / l and 20 mg / l with 3 replications. Data were analyzed use variance analysis, first normality and homogeneity variety of data were carried out and to find out the differences in effects between treatments with Tukey test. Variables observed are survival of Sea bass seeds and water quality. Results showed that the usage of keben fruit extract with different dosage differences as fish anesthesia had a very significant effect on survival of Sea bass (Lates calcarifer). Optimum dose for survival of Sea bass with the usage of keben fruit extract is 5 mg/l by 94%. Quality of water measured during the study is temperature, pH, and dissolved oxygen (DO). Temperatures range from 26-26.5˚C, pH ranges from 6.78-7.20; Dissolved oxygen (DO) ranges from 5.55 - 6.95. Keywords: keben fruit seed extract, transportation, Sea bass. PENDAHULUAN Kabupaten Pekalongan mempunyai potensi perikanan payau berupa tambak di 3 kecamatan yaitu Kecamatan Siwalan, Kecamatan Wonokerto dan Kecamatan Tirto. Salah satu jenis ikan yang bisa dikembangkan untuk budidaya di tambak adalah ikan kakap putih. Selain mempunyai nilai ekonomis tinggi, ikan kakap juga mempunyai sifat yang euryhaline (Febianto, 2007). Benih ikan kakap bisa didapatkan dari BBPBAP jepara, BBPBL Lampung maupun BPBAP Situbondo. Permasalahan yang sering dihadapi oleh pembenih ikan kakap putih adalah perubahan kualitas air selama transportasi, seperti O 2 dalam media air yang menurun, peningkatan CO 2 yang mengakibatkan ikan stres sehingga tingkat kelangsungan hidup benih menjadi rendah.