The Experts below are selected from a list of 264 Experts worldwide ranked by ideXlab platform
Huaiping Zheng - One of the best experts on this subject based on the ideXlab platform.
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effects of stocking density and algal concentration on the survival growth and metamorphosis of bobu ivory shell babylonia formosae habei neogastropoda Buccinidae larvae
Aquaculture Research, 2010Co-Authors: Huaiping Zheng, Zewen Sun, Shiqiang ZhouAbstract:Technical Exploitation of Fujian Province [98-Z-8]; Earmarked Fund for Modern Agro-industry Technology Research System [nycytx-47]
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effects of starvation on larval growth survival and metamorphosis of ivory shell babylonia formosae habei altena et al 1981 neogastropoda Buccinidae
Aquaculture, 2005Co-Authors: Huaiping Zheng, Shiqiang ZhouAbstract:The impact of starvation on larvae of Ivory shell Babylonia formosae habei was studied in a laboratory experiment. Newly hatched veligers showed considerable tolerance to starvation due to their endogenous yolk material, and time to the point-of-no-return (PNR; the threshold point during starvation after which larvae can longer metamorphose even if food is provided) was calculated to be 104.5 h. However, starvation still affected larval growth, survival, and metamorphosis. Mean shell length of larvae increased 49.77 mum day(-1) for nonstarved, but only 11.13 mum day (-1) for larvae starved for 108 h. After larvae began feeding, their growth rates rapidly recovered to the level of the nonstarved following short periods of starvation (less than 48 h), but were inhibited and unable to ever reach the level of the nonstarved when being starved beyond 48 h. Percent metamorphosis was 53.75% for the nonstarved, but all larvae died before 10 days for those starved for 108 h. Starvation not only affected larval time to reach metamorphosis, but also caused the delay in the time to metamorphosis. For the nonstarved, larvae took only 11.5 days to reach spontaneous metamorphosis, but they took 20 days to reach spontaneous metamorphosis when starved for 96 h, and this duration of delayed metamorphosis reached 8.5 days. Furthermore, the importance of yolk material for maintaining larval survival of B. formosae habei during starvation periods is also discussed. (C) 2004 Elsevier B.V. All rights reserved.
Sutrisno Anggoro - One of the best experts on this subject based on the ideXlab platform.
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pengaruh salinitas media berbeda terhadap pertumbuhan keong macan babylonia spirata l pada proses domestikasi effect of different media salinity on the growth of spotted babylon babylonia spirata l during domestication process
ILMU KELAUTAN: Indonesian Journal of Marine Sciences, 2012Co-Authors: Diana Rachmawati, Johannes Hutabarat, Sutrisno AnggoroAbstract:Proses domestikasi sangat diperlukan dalam upaya optimalisasi budidaya keong macan ( Babylonia spirata L., Neogastropoda, Buccinidae), sehingga kondisi optimum dari media yang sesuai dengan kebutuhan hidup (ekofisiologis) diketahui. Dalam media, salinitas merupakan salah satu faktor fisiologis yang berpengaruh terhadap pemanfaatan pakan dan pertumbuhan. Tujuan penelitian adalah mengkaji pengaruh salinitas media yang berbeda dan salinitas media terbaik terhadap tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong Macan pada proses domestikasi. Keong Macan diperoleh dari perairan Jepara. Pakan yang diberikan adalah ikan Juwi ( Anadontostoma chucunda ) sebanyak 5 % bobot biomass/hari. Metode rancangan acak lengkap diterapkan dalam penelitian ini dengan perlakukan media salinitas 27 ppt (hipo-osmotik), 31 ppt (iso-osmotik) dan 35 ppt (heperosmotik). Hasil penelitian menunjukkan bahwa salinitas media yang berbeda pada proses domestikasi berpengaruh sangat nyata (P 0.05) terhadap kelulushidupan keong macan. Media isoosmotik dengan salinitas 31 ppt merupakan media terbaik bagi tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong macan. Kualitas air media selama penelitian masih dalam kisaran yang layak bagi domestikasi keong macan. Kata kunci : Keong Macan, Babylonia spirata L., salinitas, domestikasi, tingkat kerja osmotik Domestication process is important factor prior to Spotted Babylon ( Babylonia spirata L., Neogastropoda, Buccinidae) culture. The optimum condition of the media in accordance with the necessities of life (eco physiology) spotted Babylon for domestication is not been understood, therefore the present work was aimed to examine the influence of different media salinity on the level of osmotic performance, growth, survival rate and feed efficiency. Spotted Babylon were collected from Jepara waters and were fed with juwi fish ( Anadontostoma chucunda ) for 5% biomass weight/day. Three salinity medium were applied, ie. Hypo osmotic (27 ppt ), iso osmotic (31 ppt), and hyper osmotic (35 ppt). The result showed that salinity affected very significantly (P 0,05) on survival rate of Spotted Babylon ( B. spirata L .). The isoosmotic media (31 ppt) is the best for osmotic performance, growth, survival rate, and feed utilization efficiency spoted Babylon ( B. spirata L .). Water quality media during the study were still within the appropriate range for the domestication of Spotted Babylon ( B. spirata L.). Key words : Spotted Babylon, Babylonia spirata L., salinity, domestication, osmotic work
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pengaruh salinitas media berbeda terhadap pertumbuhan keong macan babylonia spirata l pada proses domestikasi
2012Co-Authors: Diana Rachmawati, Johannes Hutabarat, Sutrisno AnggoroAbstract:Proses domestikasi sangat diperlukan dalam upaya optimalisasi budidaya keong macan (Babylonia spirata L.. Neogastropoda, Buccinidae), sehingga kondisi optimum dari media yang sesuai dengan kebutuhan hidup (ekofisiologis) diketahui. Dalam media, salinitas merupakan salah satu faktor fisiologis yang berpengaruh terhadap pemanfaatan pakan dan pertumbuhan. Tujuan penelitian adalah mengkaji pengaruh salinitas media yang berbeda dan salinitas media terbaik terhadap tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong Macan pada proses domestikasi. Keong Macan diperoleh dari perairan Jepara. Pakan yang diberikan adalah ikan Juwi (Anadontostoma chucunda) sebanyak 5 % bobot biomass/hari. Metode rancangan acak lengkap diterapkan dalam penelitian ini dengan perlakukan media salinitas 27 ppt (hipo-osmotik), 31 ppt (iso-osmotik) dan 35 ppt (heperosmotik). Hasil penelitian menunjukkan bahwa salinitas media yang berbeda pada proses domestikasi berpengaruh sangat nyata (P 0.05) terhadap kelulushidupan keong macan. Media isoosmotik dengan salinitas 31 ppt merupakan media terbaik bagi tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong macan. Kualitas air media selama penelitian masih dalam kisaran yang layak bagi domestikasi keong macan. Kata kunci: Keong Macan, Babylonia spirata L., salinitas, domestikasi, Tingkat Kerja Osmotik
Shiqiang Zhou - One of the best experts on this subject based on the ideXlab platform.
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effects of stocking density and algal concentration on the survival growth and metamorphosis of bobu ivory shell babylonia formosae habei neogastropoda Buccinidae larvae
Aquaculture Research, 2010Co-Authors: Huaiping Zheng, Zewen Sun, Shiqiang ZhouAbstract:Technical Exploitation of Fujian Province [98-Z-8]; Earmarked Fund for Modern Agro-industry Technology Research System [nycytx-47]
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effects of starvation on larval growth survival and metamorphosis of ivory shell babylonia formosae habei altena et al 1981 neogastropoda Buccinidae
Aquaculture, 2005Co-Authors: Huaiping Zheng, Shiqiang ZhouAbstract:The impact of starvation on larvae of Ivory shell Babylonia formosae habei was studied in a laboratory experiment. Newly hatched veligers showed considerable tolerance to starvation due to their endogenous yolk material, and time to the point-of-no-return (PNR; the threshold point during starvation after which larvae can longer metamorphose even if food is provided) was calculated to be 104.5 h. However, starvation still affected larval growth, survival, and metamorphosis. Mean shell length of larvae increased 49.77 mum day(-1) for nonstarved, but only 11.13 mum day (-1) for larvae starved for 108 h. After larvae began feeding, their growth rates rapidly recovered to the level of the nonstarved following short periods of starvation (less than 48 h), but were inhibited and unable to ever reach the level of the nonstarved when being starved beyond 48 h. Percent metamorphosis was 53.75% for the nonstarved, but all larvae died before 10 days for those starved for 108 h. Starvation not only affected larval time to reach metamorphosis, but also caused the delay in the time to metamorphosis. For the nonstarved, larvae took only 11.5 days to reach spontaneous metamorphosis, but they took 20 days to reach spontaneous metamorphosis when starved for 96 h, and this duration of delayed metamorphosis reached 8.5 days. Furthermore, the importance of yolk material for maintaining larval survival of B. formosae habei during starvation periods is also discussed. (C) 2004 Elsevier B.V. All rights reserved.
Diana Rachmawati - One of the best experts on this subject based on the ideXlab platform.
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pengaruh salinitas media berbeda terhadap pertumbuhan keong macan babylonia spirata l pada proses domestikasi effect of different media salinity on the growth of spotted babylon babylonia spirata l during domestication process
ILMU KELAUTAN: Indonesian Journal of Marine Sciences, 2012Co-Authors: Diana Rachmawati, Johannes Hutabarat, Sutrisno AnggoroAbstract:Proses domestikasi sangat diperlukan dalam upaya optimalisasi budidaya keong macan ( Babylonia spirata L., Neogastropoda, Buccinidae), sehingga kondisi optimum dari media yang sesuai dengan kebutuhan hidup (ekofisiologis) diketahui. Dalam media, salinitas merupakan salah satu faktor fisiologis yang berpengaruh terhadap pemanfaatan pakan dan pertumbuhan. Tujuan penelitian adalah mengkaji pengaruh salinitas media yang berbeda dan salinitas media terbaik terhadap tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong Macan pada proses domestikasi. Keong Macan diperoleh dari perairan Jepara. Pakan yang diberikan adalah ikan Juwi ( Anadontostoma chucunda ) sebanyak 5 % bobot biomass/hari. Metode rancangan acak lengkap diterapkan dalam penelitian ini dengan perlakukan media salinitas 27 ppt (hipo-osmotik), 31 ppt (iso-osmotik) dan 35 ppt (heperosmotik). Hasil penelitian menunjukkan bahwa salinitas media yang berbeda pada proses domestikasi berpengaruh sangat nyata (P 0.05) terhadap kelulushidupan keong macan. Media isoosmotik dengan salinitas 31 ppt merupakan media terbaik bagi tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong macan. Kualitas air media selama penelitian masih dalam kisaran yang layak bagi domestikasi keong macan. Kata kunci : Keong Macan, Babylonia spirata L., salinitas, domestikasi, tingkat kerja osmotik Domestication process is important factor prior to Spotted Babylon ( Babylonia spirata L., Neogastropoda, Buccinidae) culture. The optimum condition of the media in accordance with the necessities of life (eco physiology) spotted Babylon for domestication is not been understood, therefore the present work was aimed to examine the influence of different media salinity on the level of osmotic performance, growth, survival rate and feed efficiency. Spotted Babylon were collected from Jepara waters and were fed with juwi fish ( Anadontostoma chucunda ) for 5% biomass weight/day. Three salinity medium were applied, ie. Hypo osmotic (27 ppt ), iso osmotic (31 ppt), and hyper osmotic (35 ppt). The result showed that salinity affected very significantly (P 0,05) on survival rate of Spotted Babylon ( B. spirata L .). The isoosmotic media (31 ppt) is the best for osmotic performance, growth, survival rate, and feed utilization efficiency spoted Babylon ( B. spirata L .). Water quality media during the study were still within the appropriate range for the domestication of Spotted Babylon ( B. spirata L.). Key words : Spotted Babylon, Babylonia spirata L., salinity, domestication, osmotic work
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pengaruh salinitas media berbeda terhadap pertumbuhan keong macan babylonia spirata l pada proses domestikasi
2012Co-Authors: Diana Rachmawati, Johannes Hutabarat, Sutrisno AnggoroAbstract:Proses domestikasi sangat diperlukan dalam upaya optimalisasi budidaya keong macan (Babylonia spirata L.. Neogastropoda, Buccinidae), sehingga kondisi optimum dari media yang sesuai dengan kebutuhan hidup (ekofisiologis) diketahui. Dalam media, salinitas merupakan salah satu faktor fisiologis yang berpengaruh terhadap pemanfaatan pakan dan pertumbuhan. Tujuan penelitian adalah mengkaji pengaruh salinitas media yang berbeda dan salinitas media terbaik terhadap tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong Macan pada proses domestikasi. Keong Macan diperoleh dari perairan Jepara. Pakan yang diberikan adalah ikan Juwi (Anadontostoma chucunda) sebanyak 5 % bobot biomass/hari. Metode rancangan acak lengkap diterapkan dalam penelitian ini dengan perlakukan media salinitas 27 ppt (hipo-osmotik), 31 ppt (iso-osmotik) dan 35 ppt (heperosmotik). Hasil penelitian menunjukkan bahwa salinitas media yang berbeda pada proses domestikasi berpengaruh sangat nyata (P 0.05) terhadap kelulushidupan keong macan. Media isoosmotik dengan salinitas 31 ppt merupakan media terbaik bagi tingkat kerja osmotik, pertumbuhan, kelulushidupan dan efisiensi pemanfaatan pakan keong macan. Kualitas air media selama penelitian masih dalam kisaran yang layak bagi domestikasi keong macan. Kata kunci: Keong Macan, Babylonia spirata L., salinitas, domestikasi, Tingkat Kerja Osmotik
J. Alistair Crame - One of the best experts on this subject based on the ideXlab platform.
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Early cenozoic differentiation of polar marine faunas.
PloS one, 2013Co-Authors: J. Alistair CrameAbstract:The widespread assumption that the origin of polar marine faunas is linked to the onset of major global cooling in the Late Eocene – Early Oligocene is being increasingly challenged. The Antarctic fossil record in particular is suggesting that some modern Southern Ocean taxa may have Early Eocene or even Paleocene origins, i.e. well within the Early Cenozoic greenhouse world. A global analysis of one of the largest marine clades at the present day, the Neogastropoda, indicates that not only is there a decrease in the number of species from the tropics to the poles but also a decrease in the evenness of their distribution. A small number of neogastropod families with predominantly generalist trophic strategies at both poles points to the key role of seasonality in structuring the highest latitude marine assemblages. A distinct latitudinal gradient in seasonality is temperature-invariant and would have operated through periods of global warmth such as the Early Cenozoic. To test this concept a second global analysis was undertaken of earliest Cenozoic (Paleocene) neogastropods and this does indeed show a certain degree of faunal differentiation at both poles. The Buccinidae, s.l. is especially well developed at this time, and this is a major generalist taxon at the present day. There is an element of asymmetry associated with this development of Paleocene polar faunas in that those in the south are more strongly differentiated than their northern counterparts; this can in turn be linked to the already substantial isolation of the southern high latitudes. The key role of seasonality in the formation of polar marine faunas has implications for contemporary ecosystem structure and stability.
