|
|
|
| Registros recuperados: 919 | |
|
|
| Dia, M.; Ghorbel, M.; Kone, Y.; Bouaîn, A.. |
| L’étude de la croissance de Pagrus caeruleostictus des côtes de Nouakchott (Mauritanie) a été réalisée par scalimétrie. L’analyse des variations mensuelles de l’allongement marginal (A.M.) a permis de montrer que la période d’apparition des anneaux d’arrêt de croissance est située en février. Par rétro-calcul, nous avons déterminé la longueur à la fourche (LF) à l’apparition de chaque anneau d’arrêt de croissance en utilisant la relation liant la longueur du poisson au rayon de l’écaille. L’application du modèle de Von Bertalanffy sur ces longueurs, a permis d’obtenir les paramètres de la croissance moyenne en longueur et en masse de l’espèce pour les 2 sexes pris séparément. Ce modèle s’applique bien à la croissance de ce poisson du fait que les valeurs... |
| Tipo: Journal Contribution |
Palavras-chave: Scalimétrie; Age; Growth; Growth; Age; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/3687 |
| |
|
| |
|
| |
|
|
| Chater, Ines; Romdhani-dhahri, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Chakroun-marzouk, Nadia. |
| The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p < 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for... |
| Tipo: Text |
Palavras-chave: Brown meagre; Thin otoliths; Growth; Mortality; Gulf of Tunis; Mediterranean Sea. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00424/53552/54415.pdf |
| |
|
|
| Hamed, Oussama; Dufour, Jean-louis; Chakroun-marzouk, Nadia; Mahe, Kelig. |
| Age, growth and mortality of the Starry weever Trachinus radiatus were studied for the first time from 214 individuals collected in the Gulf of Tunis between February 2014 and January 2016. The significant relationship between length-weight was observed for males (a = 0.011, b = 2.992, R2 = 0.981, n = 77) and females (a = 0.010, b = 3.036, R² =0.957, n = 109). Age was estimated by the observation of otoliths transverse thin sections. Age of individuals ranged from 1 to 15 years. The precision was measured by two age estimations from two experts and indicated a good agreement between them (PA = 85.6%, CV = 3.8% and IAPE = 4.1%). The growth parameters of the von Bertalanffy model were TL∞ = 38.41 cm, W∞ = 507.47 g, K = 0.3396 year-1, t0 = 0 year for males... |
| Tipo: Text |
Palavras-chave: Growth; Age; Mortality; Trachinus radiatus; Starry weever; Gulf of Tunis; South-Central Mediterranean Sea. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00477/58905/61467.pdf |
| |
|
|
| Khaldi, Asma; Chater, Ines; Elleboode, Romain; Mahé, Kelig; Chakroun-marzouk, Nadia. |
| Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural... |
| Tipo: Text |
Palavras-chave: Age; Growth; Gulf of Tunis; Lithognathus mormyrus; Lopt; Mortality; Otolithometry; Sparidae; Weight–length relationship. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00676/78770/80945.pdf |
| |
|
|
| Osman, Yassein A. A.; Mehanna, Sahar F; El-mahdy, Samia M; Mohammad, Ashraf S; Mahe, Kelig. |
| The age and growth of the haffara seabream, Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red sea, Egypt, were investigated using a sample of 466 specimens. The fish length varied between 12.7 and 27.2 cm and the weight from 38.1 to 293.2 g. Samples were collected from the artisanal fisheries during the fishing season from August 2018 to July 2019. The relationship between the body lengths (total, fork and standard length in cm) and the body weight (g) was found to be significant (p < 0.05). The relationship between the body length and weight regarding the sex effect was insignificant for all samples (log W- log TL, ANCOVA, p > 0.05). The relationship between length and weight was estimated by a power regression function, with a... |
| Tipo: Text |
Palavras-chave: Age precision; Growth; Rhabdosargus haffara; Hurghada; Red Sea; Egypt stock assessment. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00623/73484/72774.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Le Berre, Jerome. |
| Introduction: This document is the End of Second Year internship report for Rennes University 1's Senior Math and Computer Science Modelisation Professional diploma. This two month internship was completed at the Brest IFREMER center at the Coastal Ecology department. IFREMER participates, in the course of its institutional missions, in observation and coastal sea surveillance, in order to improve on the knowledge, protection methods and restoration of the marine environment. Marine phytoplankton proliferation is an important study subject because of its potential cause for nuisance, for men, consumers of sea products as well as for the ecosystem. During Spring and Summer, shellfish become invariably unsuitable for consumption due to toxins produced by... |
| Tipo: Text |
Palavras-chave: Aquaculture; Growth; Phytoplanctonic algae; Mathematical models. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/rapport-1770.pdf |
| |
|
|
| Medhioub, Walid; Sechet, Veronique; Truquet, Philippe; Bardouil, Michele; Amzil, Zouher; Lassus, Patrick; Soudant, Philippe. |
| Growth and spirolide production of the toxic dinoflagellate Alexandrium ostenfeldii (Danish strain CCMP1773) were studied in batch culture and a photobioreactor (continuous cultures). First, batch cultures were grown in 450 mL flasks without aeration and under varying conditions of temperature (16 and 22 degrees C) and culture medium (L1, f/2 and L1 with addition of soil extract). Second, cultures were grown at 16 degrees C in 8 L aerated flat-bottomed vessels using L1 with soil extract as culture medium. Finally, continuous cultures in a photobioreactor were conducted at 18 degrees C in L1 with soil extract; pH was maintained at 8.5 and continuous stirring was applied. This study showed that A. ostenfeldii growth was significantly affected by temperature.... |
| Tipo: Text |
Palavras-chave: Alexandrium ostenfeldii; Batch; Growth; Photobioreactor; Spirolide production. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00049/16050/15784.pdf |
| |
|
|
| Hansen, J.E.; Madirolas, A.. |
| Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of variability that followed the same trend ranged between 7.4. and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season represented, in any case, relatively low... |
| Tipo: Journal Contribution |
Palavras-chave: Echo surveys; Biomass; Sexual maturity; Growth; Mortality; Biomass; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/2531 |
| |
|
|
| Riva, A.; Lelong, P.. |
| The lagoon of Brusc located on the Mediterranean coast (VarFrance) is subjected to climatic and hydrologic particular conditions. The low values observed for nutrient into the sea water affect the evolution of phytoplankton. Thus chlorophyll concentration measured in the lagoon give an annual average of 0.42 mg. m-3 . The growth of two bivalves species : Cerastoderma glaucum and Venerupis semidecussata was compared between two stations where one population of each species are implanted. The culture of this molluscs is made in the lagoon and in outdoor pound dug on the old salt-pan near at hand. In the pound, subjected to natural climatic conditions, a great growth is noted for this two species. The growth rate appear better than the populations of the... |
| Tipo: Text |
Palavras-chave: Lagune méditerranéenne; Production primaire; Bivalves; Croissance; Mediterranean Lagoon; Primary production; Bivalves; Growth. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00306/41674/40883.pdf |
| |
|
|
| QAYYUM,A.; RAFIQ,M.K.; ZAHARA,K.; BIBI,Y.; SHER,A.; RAFIQ,M.T.; AZIZ,R.; MANAF,A.. |
| ABSTRACT The present study was conducted to investigate the allelopathic effects of Prosopis juliflora (Sw.) DC. (Mesquite) on various growth parameters of three promising grass species (Cenchrus ciliaris, Panicum antidotale and Panicum maximum) on the Potohar Plateau, Pakistan, under nursery conditions. The experiment was carried out under a completely randomized design with two factors and three replicates. Different concentrations of the foliage aqueous extract of P. juliflora were prepared and their effect was studied on root length, shoot length, fresh and dry biomass of tested grass species. All grass species showed a concentration dependent inhibition. However, among all grasses, C. ciliaris was affected most severely whereas P. antidotale was the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Cenchrus ciliaris; Panicum antidotale; Panicum maximum; Growth. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100322 |
| |
|
|
| YAR,S.; KHAN,E.A.; HUSSAIN,I.; RAZA,B.; ABBAS,M.S.; MUNAZZA,Z.. |
| ABSTRACT: Allelopathy has become a paramount tool for controlling weeds in crop plants without deteriorating the environment. Allelopathic effects of sorghum aqueous extracts and sorghum powder on a single cross maize (Zea mays L.) hybrid “HC-8080” and a summer weed, jungle rice (Echinochloa colona L.) were assessed in the research laboratory of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, KPK, Pakistan. The treatments included: T1: control (untreated check), T2: sorghum aqueous extract at a rate of 5 mL kg-1 soil, T3: sorghum aqueous extract at a rate of 10 mL kg-1 soil, T4: sorghum aqueous extract at a rate of 15 mL kg-1 soil, T5: sorghum powder at a rate of 5 g kg-1 soil, T6: sorghum powder at a rate of 10 g kg-1 soil and T7:... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sorghum allelopathy; Germination; Growth; Maize. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100205 |
| |
|
| |
|
|
| Peres,Marize Terezinha Lopes Pereira; Mapeli,Ana Maria; Faccenda,Odival; Gomes,Alcir Teixeira; Honda,Neli Kika. |
| Environmental degradation caused by the excessive use of pesticides has motivated studies aimed at the discovery of new formulations for pest control. The bioassays carried out under laboratory conditions for the present study involved the germination and seedling growth of Lactuca sativa cv. Grand Rapids and Allium cepa cv. Baia Periforme treated with lecanoric acid or one of seven esters obtained from the alcoholysis of the acid. Each substance was tested at concentrations of 10-3, 10-5, 10-7 M, and 10-9 M. The results revealed that, except for lecanoric acid and methyl orsellinate, all other compounds exhibited significant differences in their action when compared with the controls. Also, A. cepa was more sensitive to the compounds assayed, at the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Germination; Growth; Lactuca sativa; Allium cepa; Orsellinates. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400027 |
| |
|
|
| Garcia,Iraides Ferreira Furusho; Alvarenga,Tharcilla Isabella Rodrigues Costa; Perez,Juan Ramon Olalquiaga; Almeida,Amelia Katiane de; Gallo,Sarita Bonagurio; Pereira,Idalmo Garcia; Alves,Nadja Gomes; Alvarenga,Flávio Augusto Pereira. |
| Males and females, including purebred Santa Inês lamb (SI) and crosses between Santa Inês dams and Texel (TxSI), Ile de France (IFxSI) and Bergamasca (BxSI) sires were feedlot finished and slaughtered at 15, 25, 35 and 45kg live weight. After slaughter, the following non- carcass components were weighed and calculated the allometric growth. Lungs of BxSI males grew faster than those of SI and TxSI. Trachea/esophagus in SI and TxSI males grew slower than IFxSI and BxSI. Kidneys BxSI males grew faster than TxSI and IFxSI. Livers of female TxSI lamb grew more rapidly than those of females in the other genetic groups. In both males and females, the rumen/reticulum grew faster in the TxSI group than SI and BxSI groups. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometry; Growth; Crossbreed; Body development; Sheep. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701229 |
| |
| Registros recuperados: 919 | |
|
|
|
