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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL PERIKANAN DAN KELAUTAN TROPIS Marine Research in Indonesia
Husen Rifai
Fakultas Perikanan dan Ilmu Kelautan, Universitas Sam Ratulangi, Manado, Sulawesi Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences

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Benthic faunal assemblages in seagrass meadows in Albany, Western Australia Rifai, Husen
AQUATIC SCIENCE & MANAGEMENT Vol 7, No 1 (2019): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.7.1.2019.24996

Abstract

Title (Bahasa Indonesia): Kumpulan fauna bentik di hamparan lamun di Albany, Australia Barat In order to compare benthic fauna assemblages in four locations of seagrass beds in Albany (Princess Royal Harbour, Oyster Harbour, Two People Bay and Frenchman Bay), a research had beenconducted between 18 and 21 April 2017. There were two aims of this study. First, to investigate six sites within four locations with various degree of anthropogenic impact in order to understand the faunal richness and abundance in those locations. Second, to measure and record the environmental factors which are assumed to be important regulators of the observed patterns between the sites. The result showed that the highest faunal abundance (227 Faunal) was found at Frenchman Bay, a less anthropogenically impacted area, while the lowest abundance (26 Faunal) was at Oyster Harbour-Emu Point which was an anthropogenically affected site. However, in terms of faunal diversity, there was no significant difference among all sites. The environmental factor which had significant relationship with the difference in benthic faunal assemblages at each site was found to be coarse sand.Satu kegiatan penelitian pada tanggal 18 hingga 21 April 2017 telah dilakukan untuk membandingkan kumpulan fauna bentik di empat lokasi padang lamun di Albany (Pelabuhan Princess Royal, Pelabuhan Oyster, Teluk Two People, dan Teluk Frenchman). Penelitian inimempunyai dua tujuan, yaitu: 1) menyelidiki enam titik penelitian yang beradadalam empat lokasi dengan berbagai tingkat dampak antropogenik untuk memahami kekayaan dan kelimpahan fauna di lokasi tersebut; dan 2) mengukur dan mencatat faktor-faktor lingkungan yang dianggap berperan sebagai pengaturdari pola yang diamati pada semua lokasi. Hasil penelitian menunjukkan,bahwa kelimpahan fauna tertinggi (227 fauna) ditemukan di Teluk Frenchmanyang merupakandaerah yang kurang terdampak gangguan antropogenik;sedangkan kelimpahan terendah (26 individu) ditemukandi Oyster Harbour-Emu Point yang merupakan lokasi yang terpengaruh secaraantropogenik. Namun, dalam hal keanekaragaman fauna, tidak ada perbedaan yang signifikan di antarasemua lokasi. Faktor lingkungan yang memiliki hubungan signifikan dengan perbedaan kumpulan fauna bentik di masing-masing lokasi ialah pasir kasar.
Nematosit Karang Scleractinia, Pocillopora eydouxi Rifai, Husen; Paruntu, Carolus P.; Kusen, Janny D.
JURNAL PESISIR DAN LAUT TROPIS Vol 1, No 3 (2013): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.1.3.2013.2586

Abstract

Penelitian ini bertujuan untuk mengetahui tipe, komposisi, dan dimensi nematosit dari Karang Scleractinia, Pocillopora eydouxi. Pocillopora eydouxi yang digunakan dalam studi ini berasal dari Pantai Malalayang, Manado.  Dua tipe nematosit utama ditemukan pada Pocillopora eydouxi, yaitu holotrichous isorhizas (HI) dan microbasic p-mastigophore (MpM).  Komposisi nematosit memperlihatkan bahwa HI lebih berlimpah dari MpM.  Tipe HI memiliki panjang kapsul 63,38 ± 11,36 µm (mean ± SD) dan lebar kapsul 19,25 ± 4,60 µm (mean ± SD), sedangkan MpM memiliki panjang kapsul 27,05 ± 3,68 µm (mean ± SD), lebar kapsul 7,05 ± 1,88 µm (mean ± SD) dan panjang tangkai 19,59 ± 4,67 µm (mean ± SD).  Hasil studi menyimpulkan bahwa Pocillopora eydouxi memiliki dua tipe nematosit utama, yaitu HI dan MpM, dan mengusulkan untuk diteliti lebih lanjut peranan dari ke dua tipe nematosit tersebut.
NEMATOSIT DARI TIGA SPESIES KARANG SCLERACTINIA, GENUS POCILLOPORA Paruntu, Carolus; Rifai, Husen; Kusen, Janny D
JURNAL PERIKANAN DAN KELAUTAN TROPIS Vol 9, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (389.305 KB) | DOI: 10.35800/jpkt.9.2.2013.4177

Abstract

Nematosit dari tiga spesies karang Scleractinia, yaitu Pocillopora eydouxi, Pocillopora woodjonesi dan Pocillopora verrucosa yang mendiami terumbu karang di kawasan Pantai Malalayang, Manado, Pro­vinsi Sulawesi Utara diteliti dalam penelitian ini. Dari 25 tipe nematosit utama yang dikenal dalam filum Cnidaria, dua tipe di antaranya dijumpai pada ketiga spesies ini. Dua tipe utama nematosit, yaitu holotrichous isorhizas (HI) dan microbasic p-mastigophores (MpM) teramati pada P. eydouxi dan P. woodjonesi, dan hanya satu tipe, yaitu microbasic p-mastigophore (MpM) diamati pada P. verrucosa. Komposisi nematosit pada P. eydouxi serupa dengan P. woodjonesi, tetapi sangat berbeda dari P. verrucosa. Ukuran HI adalah berbeda antara P. eydouxi dan P. woodjonesi, dan juga ukuran MpM berbeda antara P. verrucosa dan P. eydouxi atau P. woodjonesi. Hasil pengamatan menunjukkan bahwa komposisi dan dimensi nematosit cenderung bervariasi di antara ketiga spesies ini, walaupun berada dalam satu genus.   Perbedaan-perbedaan dalam nematosit ini diusulkan untuk dapat digunakan dalam klasifikasi karang. Kata kunci: Pocillopora eydouxi, Pocillopora woodjonesi, Pocillopora verrucosa, nematosit, holotrichous isorhizas (HI), microbasic p- mastigophore (MpM).   Nematocysts of three Scleractinian corals, i.e., Pocillopora eydouxi, Pocillopora woodjonesi and Pocillopora verrucosa occurring in the reef of the coastal area of Malalayang, Manado, North Sulawesi Province were studied. Of the 25 major types of nematocysts recognized in the phylum of Cnidaria, two types were encountered in these three corals. Two major types of holotrichous isorhizas (HI) and microbasic p-mastigophores (MpM) were observed in P. eydouxi and P. woodjonesi, and only one type of microbasic p-mastigophore (MpM) was observed in P. verrucosa. The nematocyst composition of P. eydouxi was similar to that of P. woodjonesi, but markedly different from that of P. verrucosa. The size of HI was different between P. eydouxi and P. woodjonesi, and also the size of MpM was different between P. verrucosa and P. eydouxi or P. woodjonesi. The present observation showed that nematocyst composition and dimension might be varied among these three corals. It is suggested that the differences in the nematocysts could be used in the classification of corals. Keywords: Pocillopora eydouxi, Pocillopora woodjonesi, Pocillopora verrucosa, nematocysts, holotrichous isorhizas (HI), microbasic p- mastigophore (MpM).
MANAGING SHIFTING FISHERIES RESOURCES Ryan, Charlotte; Rifai, Husen; Feng, Anne; O'Hara, Nicole; Saawant, Swapnil
Marine Research in Indonesia Vol 44 No 2 (2019)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/mri.v44i2.556

Abstract

The unprecedented rate of climate change and over-exploitation of resources has had a significant impact on ecosystems around the globe. In particular, the oceanic realm has encountered multiple changes to ecosystem condition, food web dynamics and habitat constructs. Many marine species have been driven to shift their geographical range in reaction to reaching their physiological limits causing severe metabolic stress. This includes key fishery targets, such as pelagic and carnivorous fish, that supply many nations with their primary or secondary protein source. The shift also spurs an array of political and economic consequences due to the need for fisheries to follow or target different fish stocks that are no longer in their exclusive economic zone or legal fishing waters. For this reason, and many other logistical and financial reasons, management strategies have struggled to maintain and sustain fish stocks around the globe. This paper will look at a Northeast Atlantic mackerel case study; compare and analyse the implications of shifting fish stocks; and illustrate difficulties related to managing the fisheries who target these stocks. Furthermore, the authors will highlight the need for a combination of a global strategies and smaller-scale ecosystem approaches in fisheries management, to be able to sufficiently sustain fisheries and thus future food security, during a time of climatic change.
Co-Authors Carolus Paulus Paruntu Feng, Anne Janny D Kusen Janny D. Kusen O'Hara, Nicole Ryan, Charlotte Saawant, Swapnil