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All Journal Jurnal Teknologi Perikanan dan Kelautan JURNAL ENGGANO Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology)
Ayu Ervinia
Departemen Manajemen Sumberdaya Perairan, FPIK IPB University, Jl. Lingkar Kampus IPB Dramaga 16680
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Library & Information Science Other

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PENDUGAAN PERTUMBUHAN KEPITING BAKAU (Scylla serrata Forskal) DI PERAIRAN KARANGSONG, INDRAMAYU, PROVINSI JAWA BARAT Iqra Putra Sanur; Sulistiono Sulistiono; Yonvitner Yonvitner; Dudi Muhammad Wildan; Ayu Ervinia
Jurnal Teknologi Perikanan dan Kelautan Vol 12 No 1 (2021): MEI 2021
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2880.965 KB) | DOI: 10.24319/jtpk.12.27-38

Abstract

Mudcrab (Scylla serrata Forskal) is one of several dominant species in the fish production from Karangsong coastal waters, Indramayu Regency. However, effort to manage the mudcrab in the waters is still limited. This study aimed to estimate a growth of the mudcrab as a base for crab management at the waters. Monthly sampling of the crab in the study area was conducted according to fisherman catch using bamboo trap for 4 months (Juni-September 2013). Carapace width and weight were employed for calculating frequency distribution, growth pattern, and growth. Growth estimation of the crab was calculated using Von Bertalanffy equation. This study revealed that the carapace width of the mudcrab ranged of 60-138 mm (male), and 74-139 mm (females). Crab’s growth patterns of the mud crab was negative allometric, W = 0.0003L2.8793 (male) dan W = 0.003L2.3210 (female). Through analysis of growth parameter estimation, it was obtained the following equatiosn: Lt = 157.35 [1-e(-0.39(t+0.26)] (male), and Lt = 147.99 [1-e(-0.42(t+0.24)] (female).
BIOLOGI REPRODUKSI IKAN BELANAK (Planiliza subviridis) YANG TERTANGKAP DI PERAIRAN PANTAI KARANGSONG, INDRAMAYU, JAWA BARAT Sri Ratnaningsih; Sulistiono Sulistiono; M Mukhlis Kamal; Dudi M Wildan; Ayu Ervinia
Jurnal Teknologi Perikanan dan Kelautan Vol 12 No 1 (2021): MEI 2021
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2792.859 KB) | DOI: 10.24319/jtpk.12.61-72

Abstract

Ikan belanak (Planiliza subviridis) merupakan salah satu dari beberapa jenis ikan yang mempunyai nilai ekonomis tinggi di Perairan pantai Karangsong. Penelitian ini dilakukan selama 6 bulan (Desember 2012-Mei 2013), bertujuan untuk mengetahui biologi reproduksi ikan tersebut yang tertangkap di perairan pantai Karangsong. Ikan contoh diambil dari hasil tangkapan nelayan dengan menggunakan gill net ukuran mata jaring 0,5-1,5 inchi (n=336 ekor). Hasil pengamatan menunjukkan bahwa rasio ikan belanak jantan dan betina tidak seimbang yaitu 1:2,0. Ikan belanak betina lebih kecil mengalami matang gonad dibandingkan dengan ikan jantan, dengan ukuran pertama kali matang gonad sebesar 114 mm (ikan jantan) dan 102 mm (ikan betina). Puncak musim pemijahan ikan belanak di Perairan pantai Karangsong diduga terjadi pada bulan Februari. Jumlah telur ikan belanak cukup besar yaitu sebesar 9.691-173.335 butir telur. Diameter telur ikan tersebut berkisar antara 0,18-0,75 mm dengan modus penyebaran dua puncak yang mengindikasikan pemijahan secara parsial.
Recruitment patterns of freshwater amphidromous fishes (Pisces: Gobiidae, Eleotridae) to the Cimaja estuary, Palabuhanratu Bay Charles P.H Simanjuntak; Faqih Baihaqi; Tri Prabowo; Shafira Bilqis A; Sulistiono Sulistiono; Ayu Ervinia
Jurnal Iktiologi Indonesia Vol 21 No 3 (2021): October 2021
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v21i3.595

Abstract

The sustainability of amphidromous fishes is determined by the success of the larval recruitment process from marine to freshwaters habitats. This study aimed to determine the recruitment pattern of freshwater amphidromous fish to the Cimaja River estuary, Palabuhanratu Bay in terms of season and daily. Amphidromous fish were caught monthly on the 25th of Hijri or waning crescent from December 2020 to August 2021. Sampling in one whole day with observation intervals every 4 hours was carried out in June 2021 to reveal the time of larvae and juveniles of the amphidromous fish recruit to the Cimaja River estuary. A total of 13 species of amphidromous fishes representing five genera and two families was captured. The recruitment of amphidromous fishes into the Cimaja River occurs between the peak of the rainy season to dry season. Generally, amphidromous recruit into the estuary waters of the Cimaja River is at the juvenile stage (11.9-21.8 mm body length). However, the recruitment of some amphidromous fish species appears at the postflexion stage (6.9-11.9 mm BL). Based on diel observations, larvae and juveniles of amphidromous fish are generally preferred to recruit to the Cimaja River estuary in the early morning (03:00 am) and afternoon (03:00 pm). Recruitment of amphidromous fish larvae to the Cimaja River follows a semi-diurnal tidal cycle which is a tidal type in Palabuhanratu Bay. Amphidromous fishes use tidal flux to recruit and migrate upstream of the Cimaja River through estuaries. Abstrak Keberlanjutan sumber daya ikan amfidromus ditentukan oleh keberhasilan proses rekrutmen larva dari habitat laut menuju perairan tawar. Penelitian ini bertujuan untuk mengetahui pola rekrutmen ikan amfidromus air tawar menuju perairan estuari Sungai Cimaja, Teluk Palabuhanratu ditinjau dari musim dan harian. Ikan amfidromus ditangkap setiap bulan pada tanggal 25 Hijriah atau awal bulan baru dari Desember 2020 sampai Agustus 2021. Sampling dalam satu hari penuh dengan interval pengamatan setiap 4 jam dilakukan pada Juni 2021 untuk menentukan waktu larva dan yuwana ikan amfidromus rekrut ke estuari Sungai Cimaja. Sebanyak 13 spesies anak ikan amfidromus mewakili lima genera dan dua famili ditemukan. Puncak rekrutmen anak ikan amfidromus di Sungai Cimaja terjadi antara pertengahan musim penghujan sampai musim kemarau. Anak ikan amfidromus yang melakukan rekrutmen ke perairan estuari Sungai Cimaja umumnya berada pada stadia yuwana (panjang tubuh 11.9-21.8 mm). Namun proses rekrutmen ke wilayah estuari Cimaja pada beberapa spesies ikan amfidromus lainnya terjadi pada stadia postflexion (6,9-11,9 mm). Berdasarkan pengamatan harian ditemukan bahwa larva dan yuwana ikan amfidromus umumnya memilih rekrut ke estuari Sungai Cimaja pada dini hari (pukul 03:00) dan sore hari (15:00). Puncak rekrutmen larva ikan amphiromus menuju Sungai Cimaja mengikuti siklus pasang semi-diurnal yang merupakan tipe pasang di Teluk Palabuhanratu. Ikan amphidromous memanfaatkan gelombang pasang untuk rekrut dan beruaya ke arah hulu Sungai Cimaja melewati daerah estuari.
SOME OCEANOGRAPHIC FEATURES OF PELABUHANRATU BAY, WEST JAVA, INDONESIA Helmy Akbar; Andre Wizemann; Ayu Ervinia; Haidir Ilyas; Hendra Pangkey; Kristiyanto Kristiyanto; Neira Purwanty Ismail; Singgih Afifa Putra
JURNAL ENGGANO Vol 4, No 1
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (729.789 KB) | DOI: 10.31186/jenggano.4.1.26-42

Abstract

Pelabuhanratu Bay plays a big role for the flow of nutrients from the land to the sea of Sothern-Java. This study was conducted in Pelabuhanratu Bay, Sukabumi, West Java, in March 2012. The aim of this study is to measure the oceanographic parameters (physical and chemical) of Pelabuhanratu Bay i.e. tides, waves, current, temperature, salinity, depth, density, dissolved oxygen (DO), total suspended solids (TSS), turbidity, pH and nutrients. The bay directly faces the Indian Ocean, during the surveyed we found mean angle of wave refraction was about ~4.3° ± 1.5°, with left side wind direction. Overall the current direction has an irregular trend. The tidal cycle of the bay is diurnal, with the temperature decrease into the deep layer. Only the surface exhibits a slightly lower salinity compared to the rest of the water column. Some parameters (i.e. TSS, DO) found in high concentration but declining following the depth. Other chemical concentrations (e.g. ortho-phosphate, silicate) also showed diminished after 10-15 depth measurement.
Co-Authors Andre Wizemann Charles Parningotan Haratua Simanjuntak Dudi M Wildan Dudi Muhammad Wildan Faqih Baihaqi Haidir Ilyas Helmy Akbar Hendra Pangkey Iqra Putra Sanur Kristiyanto Kristiyanto M Mukhlis Kamal Neira Purwanty Ismail Shafira Bilqis A Singgih Afifa Putra Sri Ratnaningsih Sulistiono Sulistiono Sulistiono Sulistiono Tri Prabowo Yonvitner -