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A comparative ecophysiological study of two infaunal filter-feeding bivalves: Paphia rhomboides and Glycymeris glycymeris ArchiMer
Savina, Marie; Pouvreau, Stephane.
A comparative ecophysiological study was carried out in September and November 2002 for two bivalves, Paphia rhomboides and Glycymeris glycymeris, which are significantly harvested in the Western Channel (French coast). Individual measurements of clearance and respiration rates were performed for both species, in several experimental conditions of temperature and phytoplankton concentrations. Those conditions were chosen to be in the range of those commonly observed in the subtidal area of the Western Channel. The mean value of clearance rate and oxygen consumption obtained from continuous data recording did not reveal any significant influence of temperature in the investigated range, but a significant difference between P rhomboides and G. glycymeris....
Tipo: Text Palavras-chave: Filter feeding; Bivalves; Glycymeris glycymeris; Paphia rhomboides; Scope for growth; Ecophysiology.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-379.pdf
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A Dynamic Energy Budget (DEB) growth model for Pacific oyster larvae, Crassostrea gigas ArchiMer
Rico-villa, Benjamin; Bernard, Ismael; Robert, Rene; Pouvreau, Stephane.
Tipo: Text Palavras-chave: Dynamic Energy Budget; Crassostrea gigas; Bivalve larvae; Ecophysiology; Growth.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00009/11996/9040.pdf
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A flow-through rearing system for ecophysiological studies of Pacific oyster Crassostrea gigas larvae ArchiMer
Rico Villa, Benjamin; Woerther, Patrice; Mingant, Christian; Le Piver, David; Pouvreau, Stephane; Hamon, Michel; Robert, Rene.
While literature is relatively abundant on adult shellfish, ecophysiological studies at the larval stage are scarce because of both technical difficulties and inadequate methodology. A tool dedicated to provide basic information for larval ecophysiology was accordingly developed. Two steps were followed: first a flow-through method of Crassostrea gigas larval culture was perfected during a set of experiments in which rearing systems and larval density were assessed. Then a continuous hydrobiological data recorder was adapted with modifications to comply with our experimental aim. SILO (Système d'Instrumentation des Larves en flux Ouvert) allowed the successive acquisition of hydrobiological parameters in ten 150 l larval tanks in which larvae were reared...
Tipo: Text Palavras-chave: Temperature; Ecophysiology; Bivalve larvae; Crassostrea gigas; Flow through.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4167.pdf
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A method to improve leaf succulence quantification BABT
Mantovani,André.
Leaf succulence has important physiological and ecological implications. Currently it is quantified by Delf's index (fresh weight/leaf area) and fresh weight/ dry weight ratio. Both indeces are reconsidered and a new index is proposed. Shade and sun leaves from terrestrial, hemiepiphytic and epiphytic aroids were studied. Delf's formula, which does not consider dry weight, overestimated leaf succulence. As fresh weight / dry weight ratio (fw / dw) does not consider leaf area, plants with the same fw / dw ratio were more than five times different in area. The last case was only possible with a decrease in surface / volume ratio and a increase of mesophyll thickness, components not measured by fw / dw ratio. The new index proposed here, which takes into...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf succulence; Water relations; Leaf anatomy; Araceae; Ecophysiology.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100002
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Aggression supersedes individual oxygen demand to drive group air-breathing in a social catfish ArchiMer
Killen, Shaun S.; Esbaugh, Andrew J.; Martins, Nicolas F.; Rantin, F. Tadeu; Mckenzie, David J..
1. Group-living is widespread among animals and comes with numerous costs and benefits. To date, research examining group-living has focused on trade-offs surrounding foraging, while other forms of resource acquisition have been largely overlooked. 2. Air-breathing has evolved in many fish lineages, allowing animals to obtain oxygen in hypoxic aquatic environments. Breathing air increases the threat of predation, so some species perform group air-breathing, to reduce individual risk. Within species, individual air-breathing can be influenced by metabolic rate as well as personality, but the mechanisms of group air-breathing remain unexplored. It is conceivable that keystone individuals with high metabolic demand or intrinsic tendency to breathe air may...
Tipo: Text Palavras-chave: Air-breathing fish; Ecophysiology; Group-living; Keystone individuals; Metabolic rate; Social behaviour.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00417/52831/78979.pdf
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Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions Ciência e Agrotecnologia
Melo,Emanuelle Ferreira; Fernandes-Brum,Christiane Noronha; Pereira,Fabrício José; Castro,Evaristo Mauro de; Chalfun-Júnior,Antonio.
Due to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be essential to maintenance of Brazilian and worldwide production. This study aimed to evaluate ecophysiological and anatomical aspects as well as the nitrate reductase activity in Siriema coffee seedlings subjected to four treatments: Daily irrigated, non-irrigated, re-irrigated 24 hours and re-irrigated 48 hours after different stress periods. Non-irrigation promoted a reduction in leaf water potential being accented from the ninth day of evaluation onwards....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coffee tree; Ecophysiology; Water stress; Nitrate reductase.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003
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Application of a dynamic energy budget model to the Pacific oyster, Crassostrea gigas, reared under various environmental conditions ArchiMer
Pouvreau, Stephane; Bourles, Yves; Lefebvre, Sebastien; Gangnery, Aline; Alunno-bruscia, Marianne.
The Dynamic Energy Budget (DEB) model (Kooijman, S.A.L.M., 1986. Energy budgets can explain body size relations. J. Theor. Biol. 121, 269¿282; Kooijman, S.A.L.M., 2000. Dynamic Energy and Mass Budgets in Biological Systems. Cambridge University Press, Cambridge, 424 pp.) has been adapted to describe the dynamics of growth and reproduction of the Pacific oyster (Crassostrea gigas) reared in different areas under conditions ranging from controlled to natural. The values of the model parameters were estimated from available physiological data and from published information. The sets of data used to validate the model came from three long-term growth experiments (> 5 months) performed on Pacific oysters reared under different conditions of food and...
Tipo: Text Palavras-chave: Reproductive effort; Reproduction; Growth; Ecophysiology; Dynamic energy budget; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1817.pdf
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Approche ecophysiologigue et ultrastructurale de l'osmoregulation chez les crustaces decapodes ArchiMer
Pequeux, A; Lignon, J.
This paper deals mostly with recent physiological data on ion transport across the gill tissue and an attempt is made to correlate them with blood osmoregulation and ecological distribution in euryhaline decapods. A particular attention is paid to the gills of the fully euryhaline Chinese crab Eriocheir sinensis . Supporting this ecophysiological approach, there is an important ultrastructural analysis of the gill epithelium under various salinity conditions. The possible part played by the cuticle in ions movements is also considered.
Tipo: Text Palavras-chave: Eriocheir sinensis; Cancer pagurus; Maia squinado; Carcinus maenas; Decapoda; Malacostraca; Ion transport; Gills; Ecophysiology; Cuticles; Ultrastructure; Salinity tolerance.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1387.pdf
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Aspectos ecofisiológicos da pimenta-do-reino sob diversos tutores vivos. Repositório Alice
BOTELHO, M. do N.; ROCHA NETO, O. G. da; CONCEIÇÃO, H. E. O. da..
1992
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Pimenta-do-reino; Tutor vivo; Ecofisiologia; Black pepper; Ecophysiology.
Ano: 1992 URL: http://www.alice.cnptia.embrapa.br/handle/doc/394303
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Aspectos ecofisioloógicos da pimenta-do-reino sob diversos tutores vivos. Repositório Alice
VIEIRA, A. J. D.; ROCHA NETO, O. G. da; CONCEIÇÃO, H. E. O. da..
1992
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Pimenta-do-reino; Tutor vivo; Ecofisiologia; Black pepper; Ecophysiology.
Ano: 1992 URL: http://www.alice.cnptia.embrapa.br/handle/doc/394302
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Aspects of leaf anatomy of Kudzu (Pueraria lobata, Leguminosae-faboideae) related to water and energy balance. Repositório Alice
PEREIRA-NETTO, A.B. de; GABRIELE, A.C.; PINTO, H.S..
Kudzu is a cover crop that has escaped cultivation in some subtropical and warm temperate regions. Kudzu has previously demonstrated broad intraspecific physiological plasticity while colonizing new environments. The objective of this paper was to investigate characteristics of kudzu leaflet anatomy that might contribute to its successful growth in climatically distinct environments, and to escape cultivation as well. Fresh and fixed leaflet strips of field-grown plants were analyzed. The lower epidermis of kudzu showed a higher frequency of stomata (147 +- 19 stomata mm-2) than the upper epidermis (26 +- 17 stomata mm-2). The average number of trichomes per square milimeter was 8 for both the upper and the lower epidermis. The average trichome length was...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes; Anatomia de foliolos; Tricomas; Ecofisiologia; Espessura de cuticula; Estomatos.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/handle/doc/100687
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Aspects of leaf anatomy of kudzu (Pueraria lobata, Leguminosae-Faboideae) related to water and energy balance PAB
Pereira-Netto,Adaucto Bellarmino de; Gabriele,Antonio Carlos; Pinto,Hilton Silveira.
Kudzu is a cover crop that has escaped cultivation in some subtropical and warm temperate regions. Kudzu has previously demonstrated broad intraspecific physiological plasticity while colonizing new environments. The objective of this paper was to investigate characteristics of kudzu leaflet anatomy that might contribute to its successful growth in climatically distinct environments, and to escape cultivation as well. Fresh and fixed leaflet strips of field-grown plants were analyzed. The lower epidermis of kudzu showed a higher frequency of stomata (147 ± 19 stomata mm-2) than the upper epidermis (26 ± 17 stomata mm-2). The average number of trichomes per square milimeter was 8 for both the upper and the lower epidermis. The average trichome length was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000800006
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Aspects of leaf anatomy of tropical kudzu related to water and energy balance. Repositório Alice
NETTO, A. B. de P.; GABRIELE, A. C.; PINTO, H. S..
No Brasil, a pecuaria (Pueraria phaseoloides Benth, Leguminosae-Faboideae) e tradicionalmente empregada como cultura de cobertura em seringais na regiao amazonica, onde as condicoes climaticas se assemelham as condicoes climaticas tropicais encontradas no sudoeste asiatico, centro de dispersao da especie. Pueraria foi tambem introduzida na regiao sudeste do Brasil, regiao esta caracterizada pela transicao entre os climas tropical e subtropical. Este trabalho teve como objetivo descrever algumas caracteristicas da anatomia foliar de pueraria relacionadas a economia de agua e energia. A epiderme inferior apresentou maior frequencia de estomatos (213 estomatos mm2) quando comparada a epiderme superior (101 estomatos mm2). O numero medio de tricomas por...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Espessura da cuticula; Anatomia de foliolos; Tricomas; Ecofisiologia; Estomatos; Cuticle thickness; Ecophysiology; Leaflet anatomy; Stomata; Trichomes.
Ano: 1997 URL: http://www.alice.cnptia.embrapa.br/handle/doc/86250
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Biologie et genetique des populations de crustaces. Strategies mises en jeu, essai de synthese ArchiMer
Gaudy, R; Kerambrun, P.
Population genetics, which analyses the genetic structure of natural populations, has an an objective a better understanding of the mechanisms of support of the polymorphism and of the relations between this one and physical, chemical and trophic conditions of the environment. In this double objective, population genetics meet the biology of populations whose demographic aspects can be disturbed by a decrease of polymorphism (inbreeding) or by changes in ecological conditions.
Tipo: Text Palavras-chave: Crustacea; Biopolymorphism; Animal populations; Ecophysiology; Genetics.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/acte-1394.pdf
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Budbreak induction in kiwifruit vines cultivated in an organic system by the biological method of single node cutting Bragantia
Santos,Rodrigo Fernandes dos; Marques,Léo Omar Duarte; Mello-Farias,Paulo; Martins,Carlos Roberto; Konzen,Luis Henrique; Carvalho,Ivan Ricardo; Malgarim,Marcelo Barbosa.
ABSTRACT Kiwifruit vines are an alternative approach to diversify Brazilian fruit farming because of the low supply and increase in the demand for their fruits. Hydrogenated cyanamide, which is the most common rest-breaking agent, is highly toxic and its use is not allowed in organic production systems. This study aimed at evaluating the efficiency of alternative rest-breaking agents in kiwifruit vines by using the biological method of single node cutting. Twigs of the cultivar Bruno were collected in an organic orchard in Pelotas, a city located in Rio Grande do Sul state, Brazil. Seven-centimeter-long cuts with a single shoot at the ends were segmented. Cuttings were placed on plastic trays with phenolic foam and soaked in water, at 85% relative humidity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Actinidia deliciosa; Sustainability; Ecophysiology; Adaptation; Mild winter.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020005004201
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Characterization of tropical forage grass development pattern through the morphogenetic and structural characteristics R. Bras. Zootec.
Rodrigues,Carlindo Santos; Nascimento Júnior,Domicio do; Silva,Sila Carneiro da; Silveira,Márcia Cristina Teixeira da; Sousa,Braulio Maia de Lana; Detmann,Edenio.
An experiment was carried out with the objective to evaluate growth pattern of tropical forage grass under free growth by using morphogenetic and structural characteristics with the expectation of using this study for forage grass evaluation protocol. The experimental area was established with two cultivars of Panicum maximum Jacq. (Mombaca and Aruana), a hybrid cultivar of P. maximum Jacq. and P. Infestum BRA-7102 (Massai), two cultivars of Brachiaria brizantha (A. Rich.) Stapf (Marandu and Xaraes) and Molasses grass (Melinis minutiflora Beauv.) and jaragua grass (Hyparrhenia rufa (Nees) Stapf.). The grasses were planted in 1.0-m² experimental units with 24 plants arranged in a completely randomized block design with three replications. Growth pattern of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecophysiology; Grass evaluation; Morphogenesis; Multivariate analysis.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300009
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Combined effects of temperature, irradiance and pH on Teleaulax amphioxeia (Cryptophyceae) physiology and feeding ratio for its predator Mesodinium rubrum (Ciliophora) ArchiMer
Gaillard, Sylvain; Charrier, Aurelie; Malo, Florent; Carpentier, Liliane; Bougaran, Gael; Hégaret, Helene; Réveillon, Damien; Hess, Philipp; Séchet, Veronique.
The cryptophyte Teleaulax amphioxeia is a source of plastids for the ciliate Mesodinium rubrum and both organisms are members of the trophic chain of several species of Dinophysis. It is important to better understand the ecology of organisms at the first trophic levels before assessing the impact of principal factors of global change on Dinophysis spp. Therefore, combined effects of temperature, irradiance and pH on growth rate, photosynthetic activity and pigment content of a temperate strain of T. amphioxeia were studied using a full factorial design (central composite design 23*) in 17 individually controlled bioreactors. The derived model predicted an optimal growth rate of T. amphioxeia at a light intensity of 400 µmol photons · m‐2 · s‐1, more...
Tipo: Text Palavras-chave: Dinophysis; Ecophysiology; Full factorial design; Global change; Mesodinium rubrum; Teleaulax amphioxeia.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00609/72155/70910.pdf
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Comment prendre en compte les effets de l'environnement sur la qualité des fruits ? A l'échelle de la plante ou du fruit ? National Institute of Agronomic Research
Gauthier, Hélène.
Tipo: Other Palavras-chave: Fruit quality; Ecophysiology; Genetics; Cultural practice; Climate; Qualité du fruit; Écophysiologie; Échelle de l'étude; Pratique culturale; Climat; Génétique.
Ano: 2004 URL: http://hdl.handle.net/2174/319
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Competition for phosphorus between two dinoflagellates: A toxic Alexandrium minutum and a non-toxic Heterocapsa triquetra ArchiMer
Labry, Claire; Erard-le Denn, Evelyne; Chapelle, Annie; Fauchot, Juliette; Youenou, Agnes; Crassous, Marie-pierre; Le Grand, Jacqueline; Lorgeoux, Benedicte.
The understanding of the dominance of one species with respect to others is a pertinent challenge in HAB growth dynamics studies and the nutrient supply mode is one of the factors potentially involved. The competition for phosphorus (P) between a toxic species, Alexandrium minutum, and a non-toxic species, Heterocapsa triquetra, was studied (1) along a gradient of P depletion, (2) testing different P depletion degrees before a single PO4 supply and (3) experimenting different PO4 supply frequencies. In conditions Of PO4 depletion, H. triquetra stopped growing after two days both in monospecific and mixed batch cultures whereas A. minutum grew progressively from day 2 until the end of the experiment. This time-lag growth of A. minutum is associated to its...
Tipo: Text Palavras-chave: Semi continuous culture; Batch culture; Ecophysiology; Pulse; Phosphorus storage; Dinoflagellates; Heterocapsa triquetra; Alexandrium minutum.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4067.pdf
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Décontamination expérimentale de bivalves toxiques : application aux phycotoxines paralysantes. Rapport final ArchiMer
Lassus, Patrick; Bardouil, Michele; Masselin, Pierre; Naviner, Magali; Truquet, Philippe.
A sea water recirculating flume was especially designed in the framework of this study. It improves physiological and ecophysiological evaluation of a 25 oysters (c. gigas) set fed on PSP toxic A. minutum cultures and then detoxified with commonly used aquaculture species (I. galbana, T. suecica, S. costatum, T. weissflogii). Chlorophyll a levels are kept steady in each case and adjusted in order to reach the same food value in each tank (0,5 mg/l TPM). When exposed to the mildly toxic species A. minutum (0,5 pg.eq.STX.cel-1) oysters depict a reduced clearance rate, food uptake and shell-valves activity (compared to non-toxic algal diets). The same physiological parameters do not show any significant differences when oysters are exposed to the control al...
Tipo: Text Palavras-chave: Épuration; Crassostrea gigas; Alexandrium minutum; PSP; Écophysiologie; Depuration; C. gigas; A. minutum; PSP; Ecophysiology.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00139/25021/23126.pdf
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