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All Journal BERITA BIOLOGI JURNAL BIOLOGI INDONESIA Jurnal Akuatika Indonesia LIMNOTEK - Perairan Darat Tropis di Indonesia OLDI (Oseanologi dan Limnologi di Indonesia) JURNAL SUMBER DAYA AIR Best Journal (Biology Education, Sains and Technology) Barakuda 45 Manilkara: Journal of Bioscience
Agus Arifin Sentosa, Agus Arifin
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Journal : BERITA BIOLOGI

 1 
STRUKTUR KOMUNITAS IKAN INTRODUKSI DI DANAU BATUR, BALI [Community Structure of Introduced Fish in Lake Batur, Bali] Sentosa, Agus Arifin; Wijaya, Danu
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.33 KB) | DOI: 10.14203/beritabiologi.v11i3.503

Abstract

Lake Batur is the largest lake in Bali island, however information on introduced fish community is not available yet. The research aimed to identify the community structure and ecological status of the introduced fish in Lake Batur, Bali. The study was carried out on May, July and October 2011 using survey method. The fishes were obtained using experimental gill nets and by fishermen. Data analysis included index of diversity, evenness, dominance, species richness and the abc (abundance-biomass comparison) curve. The results showed the tilapia (Oreochromis niloticus) was the dominant species. The status of introduced fish community suggested to ecological stress but it was relatively undisturbed.
NISHAH KELAMIN, HUBUNGAN PANJANG-BERAT DAN UKURAN REPRODUKSI HIU Hexanchus spp. DI PERAIRAN SELATAN NUSA TENGGARA Sentosa, Agus Arifin
BERITA BIOLOGI Vol 18, No 2 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5126.152 KB) | DOI: 10.14203/beritabiologi.v18i2.3550

Abstract

Hexanchus spp. are shark species that are often caught in the Indian Ocean southern Nusa Tenggara and its status is Near Threatened, but the information is still relatively limited. This study aimed to sex ratio, length-weight relationship and reproductive size of sixgill shark, Hexanchus spp. caught from southern Nusa Tenggara waters. This study had been carried out during 2016 at the Fishing Port of Tanjung Luar, East Lombok, West Nusa Tenggara. Shark data collection was done by measuring the length, weight, maturity and fishing data. Data were analyzed  by formula of sex ratio, length-weight relationship, length at first maturity (Lm) and length at first catch (Lc). The results showed that Hexanchus spp. caught in the southern Nusa Tenggara waters consisted of H. nakamurai (81.82%) and H. griseus (18.18%). The sex ratio of both sharks was dominated by the female. The average of the total length of H. griseus (218.3 ± 96.08 cm). It was longer than H. nakamurai (127.6 ± 30.35 cm). The length-weight relationship of H. griseus was formulated as W = 0.0195 LT 2,6344 (R² = 0,9265) and H. nakamurai with the formula W = 0.002 LT 3,1098 (R² = 0.902). Both species  have the size of Lm was bigger than the size of Lc which indicated  to their population vulnerability.  
Co-Authors Abdul Hadi Andi Perdana Gumilang Andri Warsa Arip Rahman Astuti, Iswari Ratna Atmojo, Santoso Dwi Chodrijah, Umi DANU WIJAYA Dwiatmojo, Santoso Elizabeth Novi Kusumaningrum Evi Susilawati Fahmi Fahmi Hedianto, Dimas Angga Hedianto, Dimas Angga Hendayana, Yayat Hendrawan, Andika Luky Setiyo Heny Kurniawati Hidayat, Panjalu Fikri Indrianto, Rachmat Indriatmoko Indriatmoko, Indriatmoko Joni Haryadi, Joni Kusumaningtyas, Dyah Ika Lismining Pujiyani Astuti, Lismining Pujiyani M. Yogi Riyantama Isjoni Mujiyanto Mujiyanto Musyarrifah, Widiyatul Putri, Didha Andini Riyanto, Jagad Slamet Sarbini, Rakhmat Sari, Fatma Devi Nur Indah Sudarto Sudarto Suryandari, Astri Suryandari, Astri Widarmanto, Nanang