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All Journal BAWAL Widya Riset Perikanan Tangkap Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology)
Yoke Hany Restiangsih
Balai Riset Perikanan Laut
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Biological aspects of pink ear emperor, Lethrinus lentjan (Lacepede, 1802) in Bangka and adjacent waters Yoke Hany Restiangsih; Nur’ainun Muchlis
Jurnal Iktiologi Indonesia Vol 19 No 1 (2019): February 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i1.349

Abstract

Coral fish is the one of the important fish resources in Indonesian waters, but the potential and exploitation rate needs to be obtained. Pink ear emperor is one of coral fish that many caught in Bangka. Research was conducted to determine biological aspect of pink ear emperor caught by fish traps, that includes length distribution, length-weight relationship, sex ratio, maturity stage, food habits, and length at first mature. This research was conducted from February 2014 to November 2015 with sampling location in Sungailiat fishing port. The observed aspects included fork length, weight, sex, gonad maturity and fish stomach contents was done monthly. The results showed the growth pattern are allometric negative, folk length ranged from 12 to 58 cm. The condition of sex ratio of males to females was 1:2,06. The gonade maturity stage of males and females were stage I, II, III, and IV for all months of observation. Stomach contained was shellfish, crap, shrimp and fish. Length at first capture(Lc) was 28 cm and length at first maturity(Lm) was 26 cm. Size length at first capture was bigger than the size length at first maturity, so the pink ear emperor at Sungailiat available to maintained the balance of fish stock on population. Abstrak Ikan karang merupakan salah satu sumber daya yang penting di perairan Indonesia, namun tingkat potensi dan tingkat pemanfaatannya masih perlu untuk dikaji. Ikan lencam merupakan salah satu ikan karang yang banyak tertangkap di perairan Bangka. Tujuan penelitian ini mengkaji beberapa aspek biologi ikan lencam hasil tangkapan bubu, meliputi sebaran ukuran panjang, pola pertumbuhan, nisbah kelamin, dan ukuran rata-rata pertama kali matang gonad dan kebiasaan makan. Penelitian ini dilaksanankan di PPN Sungailiat pada bulan Februari 2014 – November 2015. Aspek yang diamati meliputi panjang cagak, bobot tubuh ikan, jenis kelamin, kematangan gonad, dan isi lambung ikan. Hasil penelitian menunjukkan pola pertumbuhan ikan lencam bersifat allometrik negatif. Sebaran ukuran panjang berkisar antara 12 – 58 cm. Nisbah kelamin jantan terhadap betina sebagai 1 : 2,06. Pada setiap bulan pengamatan tingkat kematangan gonad jantan dan betina berada pada stadia I, II, III, dan IV. Isi lambung ikan lencam selama pengamatan terdiri dari kerang-kerangan, kepiting, udang, dan hancuran ikan. Panjang pertama kali ikan tertangkap (Lc) sebesar 28 cm dan pertama kali matang gonad (Lm) sebesar 26 cm. Rata-rata ukuran pertama kali tertangkap lebih besar dbandingkan dengan ukuran pertama kali matang gonad sehingga ikan lencam di Perairan Bangka masih dapat mempertahankan keseimbangan stok dalam suatu populasi.
ASPEK BIOLOGI DAN KEBIASAAN MAKANAN IKAN CAKALANG (Katsuwonus pelamis) DI LAUT FLORES DAN SEKITARNYA Yoke Hany Restiangsih; Khairul Amri
BAWAL Widya Riset Perikanan Tangkap Vol 10, No 3 (2018): (Desember) 2018
Publisher : Pusat Riset Perikanan, BRSDM KP.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.736 KB) | DOI: 10.15578/bawal.10.3.2018.187-196

Abstract

Cakalang (Katsuwonus pelamis) merupakan ikan yang memiliki nilai ekonomis penting dan banyak tertangkap dengan huhate di perairan Laut Flores dan sekitarnya. Tujuan Penelitian adalah mengkaji beberapa aspek biologi ikan cakalang yang didaratkan di Pangkalan Pendaratan Ikan (PPI) Amagarapati dan unit pengolahan ikan (UPI) di Larantuka pada bulan Februari sampai Oktober 2015. Hasil penelitian menunjukkan ukuran panjang cagak berkisar antara 25 – 74 cm dengan modus pada nilai tengah 42 cm. Pola pertumbuhan bersifat alometrik positif dan nisbah kelamin jantan terhadap betina sebagai 1:1,14. Awal musim pemijahan berlangsung pada Februari-Maret dan Juli-Agustus. Ukuran pertama kali ikan tertangkap (Lc) pada panjang 48,8 cmFL lebih besar dengan panjang pertama kali matang gonad (Lm ) 41,1 cmFL, diduga perikanan cakalang di Larantuka mengarah pada recruitment overfishing. Kebiasaan makan ikan cakalang bersifat karnivora dengan komposisi 55,7% ikan tembang (Sardinella spp); 34,7% ikan teri (Stelophorus spp); 7,9% ikan layang (Decapterus spp); 0,9% cumi-cumi (loligo sp); 0,7% berupa hancuran ikan yang sudah tidak dapat diidentifikasi jenisnya dan sebesar 0,1%, berupa krustasea.Skipjack tuna (Katsuwonus pelamis) is one of caught by pole and line in Flores Sea and adjacent waters. Research was conducted to study biological aspects of skipjack tuna based on monthly catches landed at Amagarapati fishing port in Larantuka during February to October 2015. The results showed that fork length ranged from 25 to 74 cm with modus of 42 cm midlength. The growth pattern are alometric positive. The sex ratio of males to females was 1:1,14. The results showed that spawning seasons occured in February-March and July-October. Length at first capture (Lc) by pole and line was 48.8 cmFL and length at first maturity (Lm) was 41.1 cmFL, this condition indicated recruitment overfishing in its fisheries. Food habits of skipjack tuna are carnivorous with composition 55,7% Sardinella spp; 34,7% Stelophorus spp; 7,9% Decapterus spp; 0,9% Loligo sp; 0,7% flesh fish fragments that can’t be identified; and 0,1%, crustasea.
DUGAAN MUSIM PEMIJAHAN IKAN CAKALANG (Katsuwonus pelamis) DI PERAIRAN SAMUDRA HINDIA SELATAN JAWA DAN NUSA TENGGARA Yoke Hany Restiangsih; Anthony Sisco Panggabean; Erfind Nurdin
BAWAL Widya Riset Perikanan Tangkap Vol 12, No 1 (2020): (April) 2020
Publisher : Pusat Riset Perikanan, BRSDM KP.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.12.1.2020.1-10

Abstract

Sumberdaya ikan cakalang (Katsuwonus pelamis) merupakan ikan ekonomis penting dan utama di Indonesia. Tingginya tingkat pemanfaatan ikan cakalang di Samudra Hindia menjadi hal yang sangat rawan dan perlu kehati-hatian dalam pengelolaannya. Tersedianya data dan informasi tentang musim pemijahan merupakan bagian dari pengetahuan yang diperlukan untuk mengetahui status sumberdaya bagi upaya pengelolaannya. Penelitian ikan cakalang dilakukan berdasarkan pengambilan contoh biologi dibeberapa tempat pendaratan ikan (Palabuhan Ratu, Prigi dan Labuhan Lombok). Penelitian dilaksanakan pada bulan Januari sampai dengan Nopember 2016. Pendugaan musim pemijahan menggunakan pendekatan indeks kematangan gonad (IKG) bulanan. Distribusi ukuran ikan yang tertangkap dengan menggunakan pancing tonda berkisar antara 24 – 66 cm. Ukuran rata-rata pertama kali tertangkap (Lc) pada panjang 41,6 cm, ukuran pertama kali matang gonad (Lm) 42,5 cm. Berdasarkan fluktuasi IKG musim pemijahan ikan diduga berlangsung pada bulan April dan Nopember.Skipjack tuna (Katsuwonus pelamis) are most important and economically fish in Indonesia. The highest exploitation skipjack in the Indian Ocean is very vulnerable are requires caution in its management. The availability of data and information about the spawning season is a part of the knowledge needed to determine the status of resources for management efforts. This research was carried out based on biological sampling at several fish landing sites (Palabuhanratu, Prigi, and Labuhan Lombok). This research was conducted from January until to November 2016. Estimating of the spawning season was used a monthly Gonado Somatic Index (GSI) approach. The range of size distribution from of fish caught using troll line were 24 until 66 cm. The average size of first caught (L50%) at a length was 41.6 cm, the size of the length of first maturity (Lm) was 42,5 cm. Based on the GSI fluctuation, spawning season was done in April and November.
PARAMETER POPULASI, ASPEK REPRODUKSI DAN PENANGKAPAN IKAN KEMBUNG (Rastrelliger brachysoma Bleeker, 1851) DI PERAIRAN TANGERANG Karsono Wagiyo; Heri Widiyastuti; Yoke Hany Restiangsih
BAWAL Widya Riset Perikanan Tangkap Vol 12, No 2 (2020): (AGUSTUS) 2020
Publisher : Pusat Riset Perikanan, BRSDM KP.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.12.2.2020.91-101

Abstract

Ikan kembung (Rastrelliger brachysoma) mempunyai nilai ekonomi tinggi di Indonesia dan Asia Tenggara. Pemanfaatannya sudah berlangsung lama secara intensif, sehingga memerlukan data dan informasi terkini. Dalam makalah ini mengkaji parameter populasi, aspek reproduksi dan aspek penangkapan sebagai bahan pengelolaan sumberdaya ikan kembung. Penelitian dilakukan di Wilayah Tangerang dengan perolehan data dan informasi melalui enumerator dan observasi pada periode Januari-Desember 2016. Hasil penelitian didapatkan panjang cagak ikan kembung 10,4-20,5 cmFL, rerata15,9 cmFL, panjang pertama kali tertangkap 15,54 cmFL, panjang pertama matang gonad 14,1 cmFL dan panjang asimtotik(L)=21,26 cmFL. Laju pertumbuhan (K) = 1,33/tahun, laju kematian total 6,18/tahun, laju kematian alami (M)=2,37/tahun dan laju kematian karena penangkapan (F) = 3,81/tahun, laju eksploitasi (E)=0,62/tahun. Nisbah kelamin betina berbanding jantan= 1: 1,3. Persentase gonad matang dan indeks kematangan gonad tertinggi terjadi Februari dengan dugaan pemijahan terjadi pada Maret. Indeks kelimpahan (CPUE) tertinggi terjadi Mei dan puncak penangkapan terjadi September. Alat tangkap utama jaring insang dengan kontribusi ikan kembung rerata 23,38 %. Kontribusi produksi ikan kembung terhadap produksi perikanan total cenderung meningkat. Penangkapan ikan kembung dengan jaring insang dapat terus dilakukan dengan tidak menambah upaya.Short mackerel (Rastrelliger brachysoma) has high economic value in Indonesia and Southeast Asia. Intensive exploitation has been going on for a long time, so it requires the latest data and information. This research to study population parameters, reproductive aspects and fishing aspects to support for short mackerel resource management. The research was conducted in the Tangerang area with data and information acquisition through enumerators and observations in the period January-December 2016. The results showed that the fork length of short mackerel was 10.4-20.5 cmFL, the average was 15.9 cmFL, the length of the first caught was 15.54 cmFL, the length of the first mature gonads was 14.1 cmFL and the asymptotic length (L)=21.26 cmFL. Growth rate (K)=1.33/year, total mortality rate 6.18/ year, natural mortality rate (M) = 2.37/year and fishing mortality rate (F) =3.81/year, exploitation rate (E)=0.62/year. Sex ratio of female against male = 1: 1.3. The highest percentage of mature gonads and maturity index of gonads occurred in February, with suspicion that spawning occurred in March. The highest abundance index (CPUE) occurred in May and the peak of fishing occurred in September. The main fishing gear of the gill nets with an average contribution of short mackerel 23.38%. The contribution of short mackerel production to total fishery production tends to increase. Catching short mackerel with gill nets can be continued without increasing effort.
Co-Authors Anthony Sisco Panggabean Erfind Nurdin Heri Widiyastuti Karsono Wagiyo Khairul Amri Nur’ainun Muchlis