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| Registros recuperados: 6,692 | |
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| Umana, U.A.. |
| A coastal zone contains a range of natural envionments that man uses in different ways to provide a variety of goods and services. Some of these goods (e.g. oil and gas, fish and mangrove wood) and services (e.g. recreational values of beautiful beaches) are tangible and marketable. Other such as nutrient flows, waste reception and stabilization functions are less tangible. |
| Tipo: Proceedings Paper |
Palavras-chave: Coastal zone; Environment management. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/348 |
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| Romdhane, M.S.; Ben Rejeb-Jenhani, A.. |
| La détérioration de la qualité des eaux de la lagune de Boughrara, conséquence de divers apports polluants et d’échanges d’eaux limités avec la mer, s’est traduite par un accroissement sévère de l’eutrophisation du milieu se manifestant notamment par d’importantes proliférations microalgales. L’analyse de l’évolution de l’ensemble des groupes phytoplanctoniques a montré que les périodes de forte biomasse algale sont caractérisées par des développements monospécifiques. L’importance relative croissante de la classe des dinoflagellés se manifestent par un net accroissement du rapport dinoflagellés / diatomées. Le très fort développement de l’espèce Gymnodinium cf nagasakiense , (densités maximales de l’ordre de 6.10 6 cellules par litre ) espèce connue... |
| Tipo: Journal Contribution |
Palavras-chave: Diatoms; Environmental factors; Lagoons; Phytoplankton; Geographical distribution. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/236 |
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| Perrotta, R.G.; Pertierra, J.P.; Viñas, M.D.; Macchi, G.J.; Tringali, L.S.. |
| Both mackerel mean biomass and mean fishing effort in Buenos Aires (Argentina) shelf during the period 1990-91/1994-95 were estimated. Those values were 85,792 t and 42,051 minutes, respectively. However, the best economic profit from the fishery (about $15,390,036)($1=U$S1) was estimated to take place at 28,000 minutes. It was observed a waste in fishing effort of the commercial fleet related with sea surface temperatures of 19°C or more. Moreover, adult mackerel find better trophic conditions on the continental shelf (depth 50m), while larvae originated from massive spawning in late November-early December, i.e., during the main fishing season, find their optimum at lower depths. Mackerel shoals enter and leave fishing grounds in a counterclockwise way... |
| Tipo: Journal Contribution |
Palavras-chave: Mackerel fisheries; Biomass; Catch/effort; Environmental conditions; Economic models; Commercial fishing; Biomass; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_32980. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/2465 |
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| Ksouri, J.; Challougui, I.; Mensi, F.. |
| La culture de Gracilaria a été réalisée selon le mode de bouturage dans la partie Nord-Est du lac de Bizerte du 15 Avril au 31 Mai 2006 afin de déterminer l'effet des conditions initiales optimisées sur le rendement final. Ces conditions initiales, sont caractérisées par une culture sur le fond (sur cordes tendues), un poids initial des touffes de 200 g, une distance entre les rangées de culture de 50 cm et un écartement entre les touffes de 30 cm; de ce fait, la densité initiale est de 1,4 kg/m². Au terme de 46 jours de culture, nous avons enregistré un accroissement du poids de 200 g à 1280 g engendrant un taux de croissance spécifique de 4,03 %/j et une densité finale de 9,1kg/m² (soit 91t poids frais/ha). |
| Tipo: Journal Contribution |
Palavras-chave: Algal culture; Aquaculture systems; Aquaculture techniques; Density; Growth rate; Off-bottom culture; Seaweed culture; Aquaculture techniques; Seaweed culture; Algal culture; Density; Growth rate; Http://aims.fao.org/aos/agrovoc/c_28992; Http://aims.fao.org/aos/agrovoc/c_6914; Http://aims.fao.org/aos/agrovoc/c_31892; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_16130. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3795 |
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| Acero P., A.. |
| Se incluye un listado de las 26 especies de clinidos conocidas del Caribe colombiano, de las cuales Labrisomus sp., albigenys, L. bucciferus, Starksia atlántica, Acanthemblemaria rivasi, Coralliozetus sp., Ekemblemaria nigra, Emblemariopsis sp. y Enneanectes sp. son reportadas por primera vez de la costa norte de sudamerica. Malacoctenus macropus y Stathmonotus stahli (subespecie tekla) son nuevas para el Caribe colombiano. Se demuestra la riqueza de especies de esta familia en el sur del Caribe, pues existen 49, 14 de las cuales son exclusivas de esta zona. Esta distribución zoogeográfica restringida se manifiesta claramente en los chaenopsidos, pues la cuarta parte de sus especies caribeñas son conocidas solo del sur. Los géneros Ekemblemaria,... |
| Tipo: Journal Contribution |
Palavras-chave: Marine fisheries; Taxonomy; New records; Marine fisheries; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_4611; Http://aims.fao.org/aos/agrovoc/c_7631. |
| Ano: 1979 |
URL: http://hdl.handle.net/1834/3945 |
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| Ayari- Kliti, R.; Afli, A.; Aissa, P.. |
| L’étude des bryozoaires cheilostomes du Golfe de Tunis a été entreprise à partir des sédiments superficiels prélevés par drague. L’inventaire compte cinquante cinq espèces dont dix ont été signalées pour la première fois en Tunisie (Electra verticillata, Beania hirtissima, Porella concinna, Hemicylopora collarina, Escharina dutertrei, Celleporina caminata, Palmicellaria elegans, Turbicellepora coronopusoidea, Reteporella aporosa et Reteporella sudbournensis). La plupart des espèces rencontrées sont décrites morphologiquement essentiellement à l’aide de micrographies électroniques. Une clé d’identification taxonomique des genres correspondants a été établie. Actuellement, les cheilostomes en Tunisie comptent 184 espèces contre 174 recensées dans le dernier... |
| Tipo: Journal Contribution |
Palavras-chave: Biodiversity; Taxonomy; Marine invertebrates; Bryozoa. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5301 |
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| Goovaerts, Marc. |
| Development of an African repository for electronic publications in marine science and oceanography Realisations in 2004 – Planning of 2005 The goal of OdinPubAfrica is to develop an electronic platform to collect scientific documents (articles, conference papers, working papers …) produced by members of African research institutes in the field of oceanography and marine science. A two year project was accepted by the government of Flanders in the FUST–program to realize the goal. The University Library of LUC (Belgium) is coordinating the project, which started officially on August 1, 2005. |
| Tipo: Conference Material |
Palavras-chave: Marine sciences; Oceanography; Information services. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/2735 |
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| Giménez, E.. |
| The red grouper fishery is in its decline phase presenting an average annual catch of 8191 t during the 1999 to 2003 period. Through these years Cuban fleet has reduced its fishing area toward the oriental region of the Campeche Bank while the artisanal fleet extended, increasing the overlap of sizes catched by the arisanal-industrial and artisanal-cuban fleets. The size composition of the catch shows that most of the fishes are captured before first maturation size. First catch age is 2 years, and complete fishery recruitment is at age 3 (age of first maturation), this being a factor against fishing sustainability and forcing adoption of management strategies. The natural mortality is calculated (M) for the each age in the fishery by the function Y =... |
| Tipo: Theses and Dissertations |
Palavras-chave: Management; Natural mortality; Management; Http://aims.fao.org/aos/agrovoc/c_16086. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1438 |
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| Su, Zhenxia; Yan, Yan; Huang, Liangmin. |
| Biofouling is a particular problem in the pearl oyster culture. It may reduce the growth and survival rates of the cultured species. Foulers are often themselves filter feeders, and are therefore potential competitors for food resource with the cultured species. Fouling organisms may also reduce the oxygen supply. A study was conducted to measure the impact of foulers on feeding, oxygen consumption, and waste excretion. POM, ammonia, phosphate and oxygen concentration were measured in various treatments (cultured species，foulers). This study showed that fouling organisms had significant effect on food uptake, oxygen consumption and waste excretion. The clearance rate, ammonia and phosphate release rate, oxygen consumption rate of the fouled pearl oyster... |
| Tipo: Journal Contribution |
Palavras-chave: Pearl oysters; Foulers; Oxygen consumption; Excretion. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/5861 |
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| Liu, Fucheng; Peng, Jun; Zhang, Cunyong. |
| Coastal sediment type map has been widely used in marine economic and engineering activities, but the traditional mapping methods had some limitations due to their intrinsic assumption or subjectivity. In this paper, a non-parametric indicator Kriging method has been proposed for generating coastal sediment map. The method can effectively avoid mapping subjectivity, has no special requirements for the sample data to meet second-order stationary or normal distribution, and can also provide useful information on the quantitative evaluation of mapping uncertainty. The application of the method in the southern sea area of Lianyungang showed that much more convincing mapping results could be obtained compared with the traditional methods such as IDW, Kriging... |
| Tipo: Journal Contribution |
Palavras-chave: Sediments; Mapping. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/5835 |
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| Registros recuperados: 6,692 | |
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