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Size, permeability and buoyancy of anchovy ( Engraulis Encrasicolus ) and sardine ( Sardina Pilchardus ) eggs in relation to their physical environment in the Bay of Biscay ArchiMer
Huret, Martin; Bourriau, Paul; Gatti, Paul; Dumas, Franck; Petitgas, Pierre.
The size and specific gravity of eggs of marine pelagic fish partly determine their dispersal and survival. Using an original dataset of anchovy and sardine eggs, sampled in spring over the last decade in the Bay of Biscay, we provide a parameterization of these properties on ambient water temperature and salinity. We used the density gradient column for measurement of egg specific gravity. The column was also filled with homogeneous water for sinking velocity experiments. For anchovy, these experiments confirm that the effect of egg permeability through the chorion could be neglected when modelling sinking, while it has to be considered for sardine, its perivitelline space representing 78.6% (±6.2%) of the total egg volume, as opposed to 5–10% for most...
Tipo: Text Palavras-chave: Anchovy; Bay of Biscay; Density gradient column; Egg buoyancy; Egg permeability; Egg size; Sardine.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00346/45676/45326.pdf
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การพัฒนาการเลี้ยงผีเสื้อข้าวสารเพื่อการผลิตแตนเบียนไข่ Trichogramma spp. Thai Agricultural
Winipa Chaleecan; Nutcharee Siri.
Tipo: PhysicalObject Palavras-chave: Rice moth; Corcyra cephalonica; Stainton; Trichogramma; Egg parasitoid; Rearing; Temperature; Animal feeding; Egg yields; Egg size; Hatching; Parasitism; ผีเสื้อข้าวสาร; แตนเบียนไข่; การเลี้ยงผีเสื้อ; การผลิตไข่; อุณหภูมิ; การให้อาหาร; การวางไข่; ขนาดไข่; การฟักไข่; ประสิทธิภาพการเบียน.
Ano: 2012 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5822
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