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Prof Rokhmin Dahuri: Ikan Hias Sumbang Devisa Rp 500 Miliar
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Prof Rokhmin Dahuri: Ikan Hias Sumbang Devisa Rp 500 Miliar

Komoditas ikan hias tidak hanya cantik, melainkan juga penyumbang devisa yang cukup penting. “Ikan hias  mempunyai peran stretagis dalam perekonomian Indonesia. Salah satunya, ikan hias merupakan penyumbang devisa yang cukup besar, sekitar  33,2 juta dolar AS  (Rp 500 miliar) pada 2019, dan cenderung meningkat sejak awal tahun 2000-an,” kata Koordinator Penasehat Menteri Kelautan dan Perikanan 2020-2024, Prof Dr  Ir  Rokhmin Dahuri  MS.Ia mengemukakan hal tersebut  pada Temu Koordinasi antara Stakeholder  Badan Karantina Ikan, Pengendalian Mutu dan Keamanan Hasil Perikanan, Kementerian Kelautan dan Perikanan, di  Swiss Belhotel Airport Hub-Tangerang,  Banten, Selasa (29/9).Ia menjelaskan, periode 2014-2019, tren  nilai ekspor ikan hias Indonesia meningkat rata-rata 10,2 persen per tahun, dengan dominasi dari jenis ikan hias air tawar (73,7%). Periode 2014-2019, Indonesia selalu menduduki posisi 5 terbesar dunia sebagai negara eksportir ikan hias.  “Pada 2019, Indonesia menduduki posisi ke-3,  dengan kontribusi 9,9 persen terhadap total ekspor ikan hias dunia,” tuturnya.Ia menambahkan,  hias hias merupakan penyedia lapangan kerja yang lumayan besar.  “Sekitar 30.000 orang bekerja di kegiatan on-farm dan 45.000 bekerja di kegiatan off-farm. Bisnis ikan hias juga membangkitkan multiplier effects yang besar,” ujar Guru Besar Fakultas Perikanan dan Ilmu Kelautan-IPB itu dalam rilis yang diterima Republika.co.id.Peran strategis lainnya adalah membantu mengurangi pengangguran dan kemiskinan dan pengangguran.  “Pendapatan rata-rata per rumah tangga pembudidaya ikan hias mencapai Rp 50.484.000 /tahun atau  sekitar Rp 4,2 juta /bulan, jauh lebih besar dibanding pendapatan dari usaha pertanian lainnya,” ungkap ketua umum Masyarakat Akuakultur Indonesia (MAI).Guru Besar Fakultas Perikanan dan Ilmu Kelautan IPB University, Prof Dr Ir Rokhmin Dahuri MS menyampaikan paparan tentang cara meraih peluang ekspor ikan hias melalui penerapan jaminan kesehatan ikan dalam mendukung peningkatan devisa negara sektor kelautan dan perikanan.  (Foto: Dok KKP)Prof Rokhmin menjelaskan, dalam dunia perdagangan ikan hias dibagi menjadi empat: 1) ikan hias air tawar (freshwater ornamental fish); 2) ikan hias air laut (marine ornamental fish); 3) tanaman hias air tawar (freshwater ornamental plant/aquatic plant); dan 4) kerang kerangan atau biota laut (invertebrata)Ia mengemukakan, segmentasi pasar ikan hias endemik terdiri dari pasar lokal/domestik, dan pasar ekspor/internasional.  Pasar lokal/domestik mencakup: pasar tradisional/bursa (UMKM), toko/retailer (UMKM), supplier, eksportir, dan hobies . Sedangkan pasar ekspor/internasional terdiri dari Asia, Eropa, Timur Tengah dan lain-lain.Rokhmin mengatakan Indonesia mempunyai potensi ikan hias yang sangat besar.  “Indonesia memiliki sumberdaya ikan hias yang melimpah, setidaknya terdapat 400 spesies ikan hias air tawar dan 650 spesies ikan hias air laut, sehingga dijuluki sebagai Home of Hundreds Exotic Ornamental Fish Species,” ujarnya.Ia menambahkan, stok ikan hias laut Indonesia diprediksi mencapai 3 miliar ekor, dengan potensi lestari sekitar 2,4 miliar ekor, tersebar terutama di lima  wilayah, yaitu: Laut Cina Selatan, Samudera Hindia, Laut Makasar & Laut Flores, Teluk Tomini & Laut Halmahera, dan Laut Banda. “Hingga saat ini baru 90 spesies ikan hias yang berhasil dibudidayakan atau hanya sekitar 7%,” ungkapnya.Data tahun 2018 menunjukkan, jumlah rumah tangga pembudidaya (RTP)  ikan hias mencapai 29.006 RT.  Mereka  sebagian besar merupakan RTP ikan hias air tawar (98,7%) dan terkonsentrasi di Provinsi  Jawa Timur (28,6%), Jawa Barat (21,4%), dan Kalimantan Barat (16,5%).Rokhmin juga menyebutkan, Indonesia mempunyai peluang ekspor dan daya saing yang tinggi terkait ikan hias. “Seiring dengan pertambahan penduduk dunia, meningkatnya daya beli (disposable income), dan ikan hias telah menjadi hobi yang paling popular di dunia. Maka, permintaan akan semakin meningkat. Ini berarti  potensi sumberdaya ikan hias Indonesia menjadi semakin strategis,” ujarnya. Selain itu, kata Rokhmin,  Indonesia memiliki potensi produksi dan keanekaragaman jenis (species diversity) ikan hias tertinggi di dunia.  Sementara, Singapura sebagai eksportir utama dunia saat ini mengalami penurunan ekspor cukup signifikan (-8% per tahun).Ia juga menyebutkan, kecenderungan (tren) pasar ikan hias sangat dipengaruhi oleh: gaya hidup konsumen, teknologi pembudidayaan, dan riset pengembangan produk. “Seiring perkembangan teknologi, maka semakin mudah untuk memasarkan ikan hias ke seluruh pasar domestik maupun global (melalui media sosial/marketplace), dan mengirimkan ikan hias (transhipper),” tuturnya.Pada kesempatan tersebut, Rokhmin memaparkan kebijakan pengembangan ekonomi ikan hias  untuk meningkatkan nilai ekspor, pertumbuhan ekonomi inklusif, dan kesejahteraan rakyat secara berkelanjutan.  Kebijakan tersebut antara lain  adalah peningkatan promosi dan pemasaran di dalam maupun luar negeri  untuk penguatan pasar yang ada saat ini (existing) dan pengembangan pasar baru. Kemudian, peningkatan produksi ikan hias dari usaha penangkapan sesuai dengan batas-batas kelestarian stok ikan: tingkat (laju) penangkapan < 80% MSY (Maximum Sustainable Yield = Potensi Produksi Lestari) dengan teknologi penangkapan ikan yang ramah lingkungan. “Tidak kalah pentingnya, penguatan teknologi budidaya untuk spesies-spesies yang sudah berhasil dibudidayakan.Pengembangan budidaya spesies-spesies baru,” tuturnya.Petani memilah dan memberi pakan ikan cupang hias budidaya rumahan di Desa Doy Ulee Kareng, Banda Aceh, Aceh, Ahad (20/9/2020). Budidaya ikan cupang hias menjadi salah satu bisnis rumahan yang kembali berkembang sejak pandemi COVID-19 dengan sistim pemasaran secara daring. ANTARA FOTO/Irwansyah Putra/foc. - (ANTARA/Irwansyah Putra)Kebijakan lainnya adalah revitalisasi ‘Raiser’ Cibinong dan pembangunan ‘Raiser’ baru di sejumlah daerah sesuai kebutuhan; peningkatan teknologi biologi molekuler dan rekayasa genetik untuk memperbaiki sifat genetik dan fenotip ikan hias, dan product development (spesies/varietas ikan hias baru); dan  peningkatan tekonologi pengemasan (packaging).Di samping itu,  kata Rokhmin, perbaikan sistem tata niaga/supply chain system (nelayan/pembudidaya – pengepul – trader/eksportir – buyer dalam/luar  negeri) dan pengembangan sistem logistik ikan hias nasional. “Ini penting guna peningkatan produktivitas, efisiensi, daya saing, dan pembagiaan keuntungan (profit sharing) yang mensejahterakan dan berkeadilan,” tuturnya. “Tidak kalah pentingnya adalah kebijakan dan regulasi pemerintah (seperti fiskal, perbankan, penangkapan ikan, budidaya ikan, dan iklim investasi) harus lebih kondusif bagi keberhasilan pembangunan dan bisnis ikan hias yang mensejahterakan dan berkelanjutan (sustainable),” papar Prof Rokhmin Dahuri.Sumber: Republika ...
Soren Dawody’s Sustainable Aquaculture is Helping Shape Grenada’s Economy
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Soren Dawody’s Sustainable Aquaculture is Helping Shape Grenada’s Economy

Nestled in the picturesque Eastern Caribbean Sea, Grenada, often called “the Spice Isle,” is known for its dramatic scenery, vibrant tourist economy, and bustling export trade in aromatic spices. Since the economic catastrophe of Hurricane Ivan in 2004, the Government of Grenada has worked to shore up export-oriented institutions and pursue deeper integration with other Eastern Caribbean states.Unfortunately, despite registering a 3.1% bump in GDP for 2019, Grenada’s economy remains deeply reliant on international travel and tourism. Thus, like many other countries with tourism-based economies, Grenada has been hit particularly hard by the COVID-19 pandemic. While the government has floated the idea of expanding the exportable spice trade to offset the tourism industry’s losses, the fact remains that island-based spice and cocoa plantations in the Caribbean remain enormously vulnerable to regional hurricanes and fluctuating rainfall patterns.Despite the breakneck pace of COVID-19 vaccine development, the broad consensus amongst economists and epidemiologists is that some form of travel restrictions will remain in force through the rest of 2020 and likely into early 2021. Faced with a protracted hiatus in overseas visitors, many tourism-dependent economies have had no other option but to reshape their industry base and restructure their growth outlook. In Grenada, this process has already been impeded by the country’s relatively weak business environment and low-skill labor market.With its principal industry lying dormant and its broader economy stuck in limbo, Grenada is now having difficulty attracting foreign direct investment (FDI). Absent a sustained inflow of FDI, Grenada risks being locked out of several much-needed growth modifiers, including infrastructure modernization and expansion, accessible commercial borrowing, and elevated entrepreneurial activity.To combat Grenada’s ongoing drought in foreign capital, a small group of investors and entrepreneurs are leveraging private-public joint ventures with the Government of Grenada to boost FDI via the country’s Citizenship by Investment program. One such venture is Grenada Sustainable Aquaculture Ltd (GSA), an environmentally-conscious and highly scalable initiative to diversify Grenada’s economy, upskill its job market, and boost its lagging GDP. Since it was endorsed as a Citizenship by Investment Project, GSA has had a 100% success rate in its investors receiving citizenship in Grenada.GSA is the brainchild of Soren Dawody, a veteran entrepreneur with extensive experience in real estate investments and development projects. A strident advocate for economic justice, Dawody has spent years working alongside governmental and non-governmental organizations in some of the world’s least developed economies. By leveraging joint ventures between the public and private sector, Dawody has helped stimulate economic development on the local level.In the case of Grenada, Dawody has identified an economy that is in dire need of diversified, joint venture enterprise. Approved and endorsed by the Government of Grenada, GSA’s flagship initiative is the establishment of a sustainable aquaculture farm in the heart of Grenada. Utilizing modern, zero-water-exchange production systems, GSA’s aquaculture is designed to synergize with local fishing operations without posing any measurable detriment to the surrounding environment.According to GSA projections, once their aquaculture is equipped with mature fish stocks, it’s per annum production will be capable of scaling to more than 8,000 tons of high-grade shrimp and fish products. Once processed, these products will be available for export to distributors in the lucrative US and South American seafood import markets. Of course, depending on demand within Grenada, some portion of GSA’s shrimp and fish products will inevitably be sold to local markets, resorts, and restaurants. While not as profitable as a pure export model, GSA’s hybrid distribution plan will do far more to help the people of Grenada, improving regional food security and fueling competition across the Caribbean’s nascent aquaculture sector.Even accounting for local consumption, GSA predicts that their flagship aquaculture farm will be cash flow positive within three years of operation. Once its cash flow transition is complete, GSA’s offshore farm is expected to singlehandedly account for a 9% bump in Grenada’s GDP. Moreover, as a premium fishery project, the construction and management of the GSA aquaculture will create over 400 long-term local jobs.Make no mistake, Dawody’s aquaculture initiative isn’t envisioned as something that will topple tourism and real estate as the mainstays of Grenada’s economy. Instead, Dawody hopes that his fish and shrimp farm, with its cutting edge aquaculture design and ultra-modern technical equipment, will stimulate substantive wage growth and reduce the prevalence of manual labor in the Grenadian economy. In addition to its more complex construction requirements, an offshore aquaculture will require a range of dedicated technical roles, with specializations across everything from marine studies and industrial information technology to climate science and aqua-farming operations.Soren Dawody is a prime example of the transformative power of altruistic investment. Joint venture initiatives like GSA mean countries can be well-positioned to deliver new economic opportunities and cushion losses to principal economic industries.Source: London Post ...
Lowongan Kerja Perikanan di Asosiasi Pengelolaan Rajungan Indonesia
Lowongan Kerja

Lowongan Kerja Perikanan di Asosiasi Pengelolaan Rajungan Indonesia

Dibuka lowongan kerja perikanan di bagian FIP Program dan Co-Management Supervisor (APRI01_ ) dan  Public Awareness and Social Media Supervisor (APRI02_) di Asosiasi Pengelolaan Rajungan Indonesia  yang berlokasi di Bogor. Berikut merupakan deskripsi lowongan kerja perikanan pada perusahaan tersebut:Kualifikasi:1. S1 Perikanan/Kelautan/Komunikasi/segala jurusan yang terkait2. Memiliki pengalaman kerja minimal 1 tahun3. Memiliki kemampuan komunikasi yangbaik, dapat bekerja dengan team, serta kreatif4. Bersedia ditempatkan kerja di BogorKetentuan:1. Pelamar APRI01 memiliki pengalaman di bidang co-management, terlibat dalam project pemberdayaan masyarakat, luwes dan dapat bekerjasama dalam tim, serta memiliki jiwa kepemimpinan.2. Pelamar APRI02 memiliki pengalaman membuat berita singkat, infografis, blogging, vlogging, menguasai software terkait, serta familiar dengan media sosial.Pendaftaran:Pelamar wajib mengunggah dokumen surat lamaran, foto, dan CV. Dokumen dijadikan satu file dalam bentuk pdf, kemudian diunggah disiniSegera kirim lamaran Anda paling lambat pada 2 Oktober 2020Lowongan Kerja PerikananMinapoli membantu calon tenaga kerja untuk menemukan lowongan pekerjaan perikanan yang sesuai dengan kriteria melalui artikel lowongan kerja, khususnya pada bidang perikanan dan kelautan. Melalui artikel ini, anda dapat menemukan kriteria yang perusahaan perikanan butuhkan. Loker pada perusahaan perikanan yang dapat anda temukan adalah seperti perusahaan pakan ikan, tambak udang, teknologi perikanan, kolam ikan, dan lain-lain yang tersebar di seluruh Indonesia. Bebeberapa jenis pekerjaan perikanan yang dapat ditemukan adalah teknisi budidaya, marketing, sales, digital marketing, quality control, research & development, dan lain-lain. ...

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The Most Innovative Aquaculture Exhibition & Conference in Asia Pasific.

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Berawal dari Warung Bubur, Pria Ini Berhasil Budidaya Lele dengan Kualitas Tinggi
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Berawal dari Warung Bubur, Pria Ini Berhasil Budidaya Lele dengan Kualitas Tinggi

Yuriko Maulana merupakan seorang pelaku budidaya ikan lele asal Desa Sidokarto, Godean, Sleman. Pada mulanya, dia memiliki keinginan untuk beternak lele saat masih kuliah. Pada saat itu dia membaca berita utama di koran saat sarapan di warung bubur ayam. Dalam berita utama itu tertulis kalau permintaan ikan lele sangat luar biasa.Setelah lulus kuliah, Yuriko memulai budidaya lele miliknya sendiri. Karena tidak memiliki dasar dalam hal perikanan, Yuriko harus terlebih dahulu belajar dari berbagai referensi yang ada. Hal utama yang paling penting untuk dipelajarinya yaitu mengenai faktor-faktor yang menjadi kendala dalam budidaya.“Salah satu faktor utama yang menentukan kesuksesan budidaya Lele adalah airnya. Karena air itu sebagai media utama hidup Lele. Dengan menjaga mutu air, otomatis Lele akan mengikuti perkembangannya seiring dengan mutu air tersebut,” ungkap Yuriko melansir dari YouTube Cap Capung pada Jumat (18/9).Dari usahanya ini, Yuriko berhasil menjadi pelaku budidaya ikan lele berkualitas yang sukses.Baca juga: Cara Ternak Lele Bioflok Sederhana Hasil MaksimalKendala Budidaya LeleYuriko mengungkapkan, kendala utama yang harus dihadapinya dalam budidaya Lele-nya yaitu kegagalan. Kegagalan yang dialaminya antara lain mengenai jumlah kematian dan faktor-faktor lain yang tidak bisa dikontrol. Kegagalan inilah yang harus ia rasakan pada tahun pertama dan tahun keduanya beternak lele.Walau begitu Yuriko tidak menyerah. Karena ia memang sedari awal bertekad untuk menjadi pelaku produsen Lele mengingat permintaannya yang luar biasa.©YouTube/Cap CapungDibagi Jadi Dua KolamDi atas tanah seluas 1.070 meter persegi, Yuriko membagi kolam-kolam di peternakan lelenya menjadi dua kolam, yaitu kolam untuk pembibitan dan kolam untuk ikan konsumsi.Menurut Yuriko, pembagian kolam itu ia lakukan karena mengaku prihatin terhadap kualitas bibit Lele yang ia hasilkan. Oleh karena itulah dia berinisiatif untuk membeli indukan yang bersertifikat.“Dengan begitu kita memelihara Lele dengan mutu dan standarisasi yang sudah ditentukan,” kata Yuriko.©YouTube/Cap CapungBaca juga: Bagaimana Cara Menebar Benih Ikan Lele yang Baik dan Benar Agar Ikan Tidak Stres dan Mati?Ingin Mematahkan ParadigmaTak hanya sekadar melakukan bubidaya Lele, tapi dengan aktivitas yang ia lakukan, Yuriko ingin mematahkan paradigma yang telah beredar di masyarakat. Paradigma itu antara lain mereka berpikir bahwa budidaya lele adalah contoh dari budidaya yang kotor dan bau.“Sebenarnya kita bisa beternak lele secara modern kok. Kita bisa beternak secara bersih, dan bisa juga mengurangi bau yang ada,” kata Yuriko.©YouTube/Cap CapungWaktu Memanen Lele Untuk bibit, Yuriko memanen Ikan Lele-nya seminggu sekali, sementara kalau untuk konsumsi dia memanen ikannya setiap dua minggu sekali.Sementara itu untuk pemasarannya dia sudah mempunyai pengepul yang sudah ia percayai selama ini. Tak lupa, diapun juga memberi tips mengenai pemasaran bagi para pemula dalam budidaya lele.“Kalau untuk pemasaran bagi teman-teman pemula atau baru memulai usaha lele, itu tidak perlu takut karena di sepanjang jalan banyak yang jualan Pecel Lele. Tinggal bagaimana pembudidaya itu mengkonsistenkan produksinya,” kata Yuriko dikutip dari YouTube Cap Capung.Baca juga: Budidaya Ikan Lele di Kolam Terpal, Perhatikan 5 Hal IniProspek CerahBicara soal prospek, Yuriko mengatakan prospek budidaya Lele masih sangat terbuka lebar. Mengingat Lele merupakan sumber protein yang murah bagi semua kalangan, mulai dari kalangan atas, menengah, hingga bawah.©YouTube/Cap Capung“Di saat daging sapi mulai melonjak tinggi, sementara kita tidak mampu membeli daging sapi, saya rasa Lele ini menjadi solusi yang brilian,” ujar Yuriko, Jumat (18/9).Sumber: Merdeka.com ...
Physiological, Biochemical Responses of Red Alga to High Temperature
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Physiological, Biochemical Responses of Red Alga to High Temperature

Carrageenan is the third most important hydrocolloid (moisture-retentive, gel-forming agents) in the world – after starch and gelatin – and occurs as matrix material in the red alga Kappaphycus alvarezii. It is used in a variety of commercial applications as gelling, thickening and stabilizing agents, especially in the food, cosmetic and pharmaceutical industries.K. alvarezii has been introduced to many countries for research, culture development and commercialization by several companies. Its commercial cultivation has been supplying the carrageenan industry over the past four decades as the biggest source of carrageenan, along with other algae such as Chondrus crispus, Hypnea musciformis and Eucheuma denticulatum.It is mainly produced in the Philippines, Indonesia and Malaysia, with Indonesia being the leading producer (110,000 metric tons, or MT, dry weight), followed by the Philippines (60,000 MT dry weight). It is also cultured in Africa and the Americas, and all over its range it is an important means of livelihood and income for coastal communities.Global warming has been an increasing concern and it poses a threat to K. alvarezii cultivation. Temperature rise due to global warming not only causes physical damage, but also affects the eco-physiological, reproductive and metabolic processes of this seaweed. In addition, K. alvarezii has become more prone to “ice-ice disease” (a term developed by farmers in the Philippines to describe the senescent tissue devoid of pigments that caused healthy branches to break off) due to abrupt changes in temperature of the seawater.This article – adapted and summarized from the original publication – investigated the physiological (growth and photosynthesis) and biochemical (carrageenan yield and quality, pigments and other parameters) responses of K. alvarezii to elevated water temperature. The results are expected to provide valuable information for farm management practices and to develop strategies to mitigate the effect of global warming, which is imperative for the sustainability of cultivation of this alga and its downstream carrageenan processing industries in the tropics.Also read: Improving Immune Performance in Aquaculture Through AlgaeStudy setupFresh and visually healthy samples – without showing signs of disease or other health issues – of K. alvarezii were obtained from a farm in Semporna, Sabah, Malaysia in April 2019. On site measurements of the seawater pH, salinity and temperature were recorded. The collected samples were transported back to the laboratory and maintained for acclimation in artificial seawater at 30 ppt salinity in a controlled environment incubator at 28 degrees-C, with continuous aeration and illuminated with white fluorescent lamps for up to seven days until the maximum quantum yield – a photosynthetic parameter – was stable.The acclimated seaweeds were cultured under four different temperatures; 28 ± 1.0 (ambient), 32 ± 1.0, 36 ± 1.0 and 40 ± 1.0 degrees-C. Commercial data loggers were used to monitor the temperature fluctuations. The light intensity, photoperiod, pH and salinity for all temperature treatments were maintained the same as during the acclimation. Each temperature treatment was conducted with five replicates and the seaweeds incubated at 28 and 32 degrees-C were cultured for fourteen days. An initial biomass of 50 ± 10 grams was used for all replicates and temperature treatments. Treatments at 36 and 40 degrees-C ended after ten and two days, respectively when the seaweeds were partly or entirely bleached, shoots became fragile and fragmented.Medium renewal of the artificial seawater was carried out every two to three days for nutrient replenishment and to overcome evaporation. The growth rate and photosynthetic response were measured every two days, whereas the pigment contents, carrageenan yield and quality were measured on day 0 and on the final day of the temperature treatment (day 14 for 28 and 32 degrees-C, day 10 for 36 degrees-C and day 2 for 40 degrees-C).For detailed information on the source and acclimation of K. alvarezii; temperature experiments; determinations of specific growth rates and photosynthetic response; pigment content, carrageenan extraction and gel strength and viscosity; and statistical analyses, refer to the original publication.Also read: Use Biofilter to Minimize Nitrogen WasteResults and discussionTo the best of our knowledge, this study marks the first report on the effect of elevated temperature on the various physiological and biochemical aspects of K. alvarezii from Malaysia. Our results demonstrate that increasing temperature significantly affected the growth rate, photosynthetic performance, carrageenan yield and quality, pigment contents and production of reactive oxygen species (indicative of stress response).In our trial, the growth rate of K. alvarezii decreased with increasing temperature above 28 degrees-C, and the highest growth rate (0.58 percent per day) was recorded at 28 degrees-C. The slowing decrease in specific growth rate, SGR (a measure of the number of divisions per cell per unit time) towards the end of the experiment at 28 and 32 degrees-C suggests that the seaweeds may slowly adapt to the environmental changes with time, although this hypothesis needs verification through long-term studies.Some authors have reported that the highest growth rate of K. alvarezii in Vietnam was recorded at 25 to 28 degrees-C, whereas the seaweed became fragile with decreased daily growth rates at temperatures of more than 33 degrees-C. Other researchers in India observed a higher growth rate when the seawater temperature ranged from 26 to 28 degrees-C. It appears that cultured K. alvarezii performs best at 27 to 30 degrees-C in tropical and subtropical waters.Fig. 1: Specific growth rate (percent per day) of K. alvarezii incubated at different temperatures. Data shown are mean values and standard deviations (n = 5). Different lowercase letters indicate significant differences (p<0.05) between different temperature treatments at each time point.In general, the growth and photosynthetic rates of seaweeds increase with temperature until an optimum temperature is reached and then rapidly decline at temperatures above the optimum. Our results showed that the K. alvarezii strain used in this study can tolerate higher temperatures of up to 32 degrees-C fairly well in terms of growth, photosynthetic activity and other parameters, despite reduced pigment content and carrageenan yield and quality by the end of the experiment.Although some seaweeds can adapt to a certain degree of heat stress, prolonged exposure to prolonged high temperature will lead to disruptive stress in the form of cellular and subcellular damage. These damages, together with reallocation of resources for protection and repair, may lead to slower growth rates. This may have been the case in our study, where the algae specimens could somewhat tolerate increasing temperatures up to 36 degrees-C, but only for ten days at the most before the shoots started to bleach and disintegrate. Even at 32 degrees-C, significant differences in growth were observed compared to the ambient temperature on day 2 (probably acute stress response to higher temperature) and from day 8 onward (suggesting that the seaweeds start to succumb to heat stress following a brief acclimation period from day 2 until day 6).Shifts in environmental factors potentially cause stress in seaweeds, which are often demonstrated in changes to photosynthetic parameters Results from our study concurred with previous reports where photosynthetic parameters are temperature dependent, given that the highest reading was obtained at the optimum temperature (28 degrees-C) and was reduced at higher temperatures. Among the range of temperatures tested in this study, 28 degrees-C appears to be the most favorable temperature for photosynthetic activity of this strain of K. alvarezii. This effect of temperature is attributed to the influence of temperature on various processes including enzymatic reactions of carbon fixation and others.Fig. 2: Various photosynthetic parameters of K. alvarezii incubated at different temperatures. Data shown are mean values and standard deviations (n = 5). Different lowercase letters indicate significant differences between different temperature treatments at each time point.The decline in photosynthesis at elevated temperatures can also be related to pigment damage. We observed a decrease in chlorophyll-a (a specific form of the plant pigment chlorophyll and involved in photosynthesis) content as temperature increased. This may be attributed to the interference in chlorophyll biosynthesis. Moreover, high temperature could lead to swelling and dilation of chloroplasts (plant organelles that carry out photosynthesis) and fracture of the chloroplast membrane. Impaired chlorophyll biosynthesis and chloroplast development causes reduction in photosynthesis and plant productivity Therefore, external environmental factors such as temperature have adverse effects in these energy transfers and consequently reduce the pigment content.Temperature can affect the yield and quality of carrageenan, as observed in K. alvarezii. Our study showed that seaweeds incubated at 32, 36 and 40 degrees-C produced significantly lower carrageenan yield compared to seaweeds incubated at 28 degrees-C, which corroborate previous studies that reported that incubation of seaweeds beyond conducive temperature lowers their gel strength and gel viscosity. When seaweeds are exposed to elevated temperature, it causes the loss of the water molecules and subsequently decrease in viscosity and gel strength. This was supported by our observations, where the percentage inhibition of gel viscosity was higher for seaweeds incubated at 32 to 40 degrees-C compared to the ambient temperature.Fig. 3: Percentage inhibition of a) carrageenan yield, b) gel strength and c) gel viscosity of K. alvarezii incubated at different temperatures. Data shown are mean values and standard deviations (n = 5). Different lowercase letters indicate significant differences (p<0.05) between different temperature treatments for each biological parameter.PerspectivesTemperature is crucial for accelerated growth and increasing photosynthetic performance. Based on our results, K. alvarezii performs best at 28 degrees-C, with signs of stress observed at 32 and 36 degrees-C, and 100 percent mortality observed at 40 degrees-C within a very short period. However, our study indicated that temperatures of 32 degrees-C and above result in lower pigment content and, consequently, reduced photosynthetic efficiency, poor growth rates, lower yield and quality of carrageenan and finally ice-ice disease occurrence and loss of biomass due to fragmentation. Even small shifts in temperature can have adverse effects on the health of K. alvarezii and have an impact on the cultivation of this commercially important alga.The effect of warming on K. alvarezii, in the long term remains unknown, but our study provides a basis for future work on long term acclimation to elevated temperatures. It can support future research to identify heat-tolerant strains for sustainable cultivation and assist with planning and management of the global seaweed aquaculture industry.Source: Global Aquaculture Alliance ...
Lowongan Kerja Perikanan di PT Cargill Indonesia
Lowongan Kerja

Lowongan Kerja Perikanan di PT Cargill Indonesia

Dibuka lowongan kerja perikanan di bagian Technology Application Manager di Cargill Indonesia yang berlokasi di Jawa Barat. PT ini bergerak di bidang pakan untuk akuakultur. Berikut merupakan deskripsi lowongan kerja perikanan pada perusahaan tersebut:Responsibilities- Lead the application of Cargill technology to meet local customer requirements- Manage formulation (review, update and optimization) to match market requirements- Work with Commercial team and “In System” SMT in developing the NPSS pipeline (include develop 4Cs)- Work with RMS to explore new ingredient opportunity- Analyze POP data, and communicate POP report with other functions- Select customer farms to do trials, design trial protocol, monitor progress, field data collection for important POP/ trial- Lead the Design & Conformance (D&C) meeting- Support/lead customers complaints/feedbacks related to feed performance- Train local team on new products, programs, services and solutions, and aquacultureQualifications- Good in principles of fish and shrimp nutrition- Basic understanding of commercial aquaculture farm management- Good on-farm problem solving skills- Ability to communicate effectively at executive level and farm level- Ability to travel and willing to visit farms 1-2 days per weekPendaftaran: linked.inLowongan Kerja PerikananMinapoli membantu calon tenaga kerja untuk menemukan lowongan pekerjaan perikanan yang sesuai dengan kriteria melalui artikel lowongan kerja, khususnya pada bidang perikanan dan kelautan. Melalui artikel ini, anda dapat menemukan kriteria yang perusahaan perikanan butuhkan. Loker pada perusahaan perikanan yang dapat anda temukan adalah seperti perusahaan pakan ikan, tambak udang, teknologi perikanan, kolam ikan, dan lain-lain yang tersebar di seluruh Indonesia. Bebeberapa jenis pekerjaan perikanan yang dapat ditemukan adalah teknisi budidaya, marketing, sales, digital marketing, quality control, research & development, dan lain-lain. ...