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| L'Herroux, Michel. |
| The use, as an aquaculture technique, of the double bottom supporting a sediment layer has numerous advantages. As far as the sediment is concerned (essential in the case of the Penaeid shrimp), this technique alone allows the sediment to stay clean as it is constantly oxidized through the percolation it creates. The water running through the sediment can either be drained off or recycled: - It has to be drained off in the case of heavy loads as it may contain some toxic products, incompletely decomposed by the bacterial activity, and especially some unsaturated short chain hydrocarbon (hexenes for most of them). - Otherwise, it can be recycled, through the use of an "Air-lift" system allowing its oxygenation at the same time. In this case, and if the set... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-5985.pdf |
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| Le Gall, Jean-yves; L'Herroux, Michel. |
| 1 - The authors study and compare the biovolumes of 69 samples taken with the Isaacs-Kidd midwater trawl during the Polymède expedition on the N. O. "Jean Charcot" (May and June, 1970) in the western Mediterranean and in the vicinity of Cap Finisterre. 2 - The authors, having assembled the measurements of physical oceanographers, have prepared a diagram of the deep-current issuing from the Mediterranean into the Atlantic North- East. It is possible to superimpose on this diagram the route used by the young albacore (Thunnus alalunga) during their annual summer migration. This correspondance suggests an inter-relation between the two phenomena provided by intermediate trophic levels. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1971 |
URL: http://archimer.ifremer.fr/doc/1971/rapport-4850.PDF |
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| Le Gall, Jean-yves; L'Herroux, Michel. |
| The authors study and compare the biovolumes of 69 samples collected with an Isaacs-Kidd trawl during the Polymède cruise of the R.V. Jean Charcot (May and June 1970) in the eastern Mediterranean Sea and around the Cap Finisterre. Based on these quantitative bases, along the 5° East meridian, two basins can be distinguished in the eastern Mediterranean Sea: - one located north of the Balearic insular arc, - the other located south of the same arc. The comparison between these two basins shows a greater "richness" of the northern area. This is especially remarkable for Euphausiacea (ratio of 1 to 30). At this time of the year and at this trophic level, no specific influence of the North-African Atlantic current can be found. A similar sample collection off... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/1973/publication-5026.pdf |
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| Le Gall, Yves; L'Herroux, Michel. |
| The authors draw up the inventary of pelagic shrimps and Euphausiids which they think, could justify experimental fishing. These species are selected from the results of 150 midwater trawls with "Isaacs-Kidd" ; this sampling was done in order to perform a general study of micronecton in the North Atlantic and in the western Mediterranean. The prospections were carry out mainly within the first 700 meters. For each species choosen a distribution map is supplied showing the location and the date of the most abondant fishing area. [NOT CONTROLLED OCR] |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1972 |
URL: http://archimer.ifremer.fr/doc/1972/rapport-4846.PDF |
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| Flassch, Jean-pierre; Koike, Y.; L'Herroux, Michel; Aveline, C.. |
| Ce problème pouvait être abordé de deux façons différentes; il était en effet possible soit de s'orienter vers les technIques Japonaises (expérimentations en semi-intensif avec utilisation de grands volumes supérieurs au m3 , procédés donnant des résultats Immédiats mais à reproductivité incertaine, emploi d'une main-d'oeuvre nombreuse et peu spécialisée), soit d'adopter pour le système clos à forte production contrôlée (mis en oeuvre assez longue, investissement immédiat plus important, utilisation en série de petits volumes à forte concentration, nourriture naturelle produite artificiellement et donnée en quantité connue, main-d'oeuvre peu abondante mais très spécialisée) . Pour une meilleure connaissance des problèmes et pour une adaptation future plus... |
| Tipo: Text |
Palavras-chave: Reproduction artificielle; Naissain; Larves; Molluques; Ostrea edulis; Haliotis tuberculata; Artificial production; Larvae; Mollusca; Ostrea edulis; Haliotis tuberculata. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00021/13250/10292.pdf |
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| Flassch, Jean-pierre; L'Herroux, Michel; Laubier, Lucien; Aveline, C.. |
| The breeding of bivalve larvae has up t o now always been conducted in closed systems. This method requires great care and consequently much labor. Using running water systems, we intended to exclude handling and avoid infestations and diseases without the use of antibiotics . Primarily, we used two cylindrical 20 m3 tanks, both with a filtering sand bottom and air-lift system. The flow was about 400 liters/hr. The temperature was 20 C. One tank was used as the filter, the second as our breeding unit in which circulation was maintained by adapted aeration. Newly released larvae of Ostrea edulis were introduced at four times. Larvae were fed daily at a rate of from 10 Isochrysis galbana, 10 Monochrysis lutheri and 2 Tetraselmis suecica per microliter to 25... |
| Tipo: Text |
Palavras-chave: Histoire Ifremer. |
| Ano: 1975 |
URL: http://archimer.ifremer.fr/doc/1975/publication-5079.pdf |
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