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Patrícia Barros Pinheiro Igor Da Mata-Oliveira Mariana Gomes do Rêgo Bruno Mourato Fábio Hissa Vieira Hazin 《Zeitschrift fur angewandte Ichthyologie》2021,37(4):523-533
The present work describes the reproductive biology of the white marlin (Kajikia albida) caught in the southwestern and equatorial Atlantic Ocean. The gonads of 924 fish were collected by observers on board Brazilian tuna longliners, between November 2004 and December 2006. The spawning season was assessed by the monthly frequency distribution of distinct stages of maturity and monthly mean female gonadosomatic index GSI. Sixty-one percent (n = 656) of the fish examined were female, with a Lower Jaw Fork Length (LJFL) between 83 and 236 cm (mean = 155.5 ± 16.63). The 268 males had a LJFL between 90 and 220 cm (mean = 152.3 ± 34.62). Although the northeastern region of Brazil does not appear to be a significant spawning area for the species, the results suggest a higher reproductive activity in the third quarter of the year. Using a Bayesian logistic model approach, length at 50% maturity was estimated at 145.04 cm (credibility interval of 95%, 143.94–146.09 cm), for females, and at 140.03 cm (credibility interval of 95%, 137.28–142.52 cm), for males. 相似文献
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Yellow lupin (Lupinus luteus L.) plants were grown in hydroponic solution for 15 d under different copper concentrations (0.1, 0.5, 1.0, 10, 25 and 50
μM). With increasing Cu concentration total biomass was not affected, leaf area slightly decreased, while chlorophyll content
decreased considerably. Cu content increased significantly both in roots and in leaves, but the contents of other ions were
only slightly affected at the highest Cu concentration (Mn content decreased both in roots and in leaves, P content decreased
only in leaves and Zn content increased in roots). Superoxide dismutase (SOD) activity increased up to day 7 after copper
application. Peroxidase (GPOD) and polyphenol oxidase (PPO) activities also increased, while catalase (CAT) activity remained
constant. 相似文献
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Characterization of aspartate aminotransferase isoenzymes from leaves of Lupinus albus L. cv Estoril
Martins ML Mourato MP de Varennes e Mendonça AP 《Journal of biochemistry and molecular biology》2002,35(2):220-227
Two aspartate aminotransferase (EC 2.6.1.1) isoenzymes (AAT-1 and AAT-2) from Lupinus albus L. cv Estoril were separated, purified, and characterized. The molecular weight, pI value, optimum pH, optimum temperature, and thermodynamic parameters for thermal inactivation of both isoenzymes were obtained. Studies of the kinetic mechanism, and the kinetics of product inhibition and high substrate concentration inhibition, were performed. The effect of some divalent ions and irreversible inhibitors on both AAT isoenzymes was also studied. Native PAGE showed a higher molecular weight for AAT-2 compared with AAT-1. AAT-1 appears to be more anionic than AAT- 2, which was suggested by the anion exchange chromatography. SDS-PAGE showed a similar sub-unit molecular weight for both isoenzymes. The optimum pH (between 8.0 and 9.0) and temperature (60-65 degrees C) were similar for both isoenzymes. In the temperature range of 45-65 degrees C, AAT-2 has higher thermostability than AAT-1. Both isoenzymes showed a high affinity for keto-acid substrates, as well as a higher affinity to aspartate than glutamate. Manganese ions induced an increase in both AAT isoenzymes activities, but no cooperative effect was detected. Among the inhibitors tested, hydroxylamine affected both isoenzymes activity by an irreversible inhibition mechanism. 相似文献
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Ferrette Bruno Lopes da Silva Mourato Bruno Hazin Fábio Hissa Vieira Arocha Freddy Williams Samuel Mackey Rodrigues Junior Carlos Egberto Porto-Foresti Fábio de Amorim Alberto Ferreira Rotundo Matheus Marcos Coelho Rui Hoolihan John P. Sow Fambaye Ngom Diaha N’guessan Constance Romanov Evgeny V. Domingues Rodrigo Rodrigues Oliveira Claudio Foresti Fausto Mendonça Fernando Fernandes 《Hydrobiologia》2021,848(17):3883-3904
Hydrobiologia - Since the Miocene profound climatic changes have influenced the biology and ecology of species worldwide, such as their connectivity, genetic population structure, and biogeography.... 相似文献
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Luisa Louro Martins Miguel Pedro Mourato Sergio Baptista Rafaela Reis Florbela Carvalheiro André M. Almeida Pedro Fevereiro Ann Cuypers 《Acta Physiologiae Plantarum》2014,36(3):755-765
The response of tobacco plants genetically engineered with the AtTPS1 gene to stress induced by excess Cu and Cd was evaluated in hydroponic solution (100 and 400 μM Cu and 50 and 200 μM Cd) after a 48 h exposure. Two transgenic lines, transformed with the AtTPS1 (trehalose-6-phosphate synthase) gene from Arabidopsis, with different levels of trehalose-6-phosphate synthase expression (B5H, higher and B1F, lower), and a wild type (WT) were investigated. Protein content, antioxidative enzymes (CAT, POD, SOD, and APX), glucose, fructose, lipid peroxidation, hydrogen peroxide and Cd and Cu contents were determined in leaves. The two transgenic lines were differently influenced by Cd and Cu exposure as they induced a different antioxidant enzymatic defense response. B1F and B5H plants showed a better acclimation to Cd and excess Cu compared to WT. Furthermore B1F was more tolerant than B5H to Cd and excess Cu. B1F accumulated less Cd and Cu in leaves, probably due to a more efficient exclusion mechanism. Catalase was shown to be the most important enzyme in the antioxidative system of these plants. 相似文献
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J. L. Costa Novaes R. Silva da Costa B. Leite Mourato D. Peretti 《Zeitschrift fur angewandte Ichthyologie》2014,30(5):1101-1102
Evaluated were the length–weight relationships of six freshwater fish species caught in the Santa Cruz Reservoir in the semiarid region of Brazil: one Characidae, one Prochilodontidae, one Anostomidae, two Loricariidae and one Cichlidae, providing the first references of length–weight relationships and new maximum lengths for these species. 相似文献
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Bruno L. Mourato Mariela Narvaez Alberto F. de Amorim Humberto Hazin Felipe Carvalho Fábio Hazin 《Marine Biology Research》2018,14(3):269-286
This study presents data and estimates reproductive parameters of the sailfish Istiophorus platypterus (Shaw, 1792) in the western Atlantic, useful for future stock assessments of the species in the Atlantic Ocean. During the period 2006–2011, a total of 1132 fish were sampled by scientific observers on board Venezuelan and Brazilian longline vessels and from artisanal fisheries based out of Cumaná, Puerto La Cruz and Playa Verde, Venezuela and Cabo Frio, Rio de Janeiro, Brazil. The ovaries of 543 females were classified into five ovarian development phases based on microscopic analysis of the most advanced group of oocytes. Generalized additive models were applied to the gonadal index and sex ratio data in order to assess spatio-temporal trends of the reproductive activity and identify the spawning areas. Space–time effect was a significant factor contributing to changes in sex ratio and reproductive activity. Spawning activity was observed in two distinct areas. On the south-east Brazilian coast spawning peaked during December–February, while in the south-eastern Caribbean Sea spawning occurred between March and September, with its peak in March and April. Using a Bayesian approach, size at 50% maturity was estimated to be 146.12?cm (credibility interval of 95%, 138.45–152.09?cm). Batch fecundity ranged from 436,800 to 2,492,500 hydrated oocytes per female. This study confirms multiple aggregation spawning for this species in the western Atlantic Ocean. 相似文献
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CO2 efflux, CO2 concentration and photosynthetic refixation in stems of Eucalyptus globulus (Labill.)
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Cerasoli S.; McGuire M. A.; Faria J.; Mourato M.; Schmidt M.; Pereira J. S.; Chaves M. M.; Teskey R. O. 《Journal of experimental botany》2009,60(1):99-105
In spite of the importance of respiration in forest carbon budgets,the mechanisms by which physiological factors control stem respirationare unclear. An experiment was set up in a Eucalyptus globulusplantation in central Portugal with monoculture stands of 5-year-oldand 10-year-old trees. CO2 efflux from stems under shaded andunshaded conditions, as well as the concentration of CO2 dissolvedin sap [CO2*], stem temperature, and sap flow were measuredwith the objective of improving our understanding of the factorscontrolling CO2 release from stems of E. globulus. CO2 effluxwas consistently higher in 5-year-old, compared with 10-year-old,stems, averaging 3.4 versus 1.3 µmol m–2 s–1,respectively. Temperature and [CO2*] both had important, andsimilar, influences on the rate of CO2 efflux from the stems,but neither explained the difference in the magnitude of CO2efflux between trees of different age and size. No relationshipwas found between efflux and sap flow, and efflux was independentof tree volume, suggesting the presence of substantial barriersto the diffusion of CO2 from the xylem to the atmosphere inthis species. The rate of corticular photosynthesis was thesame in trees of both ages and only reduced CO2 efflux by 7%,probably due to the low irradiance at the stem surface belowthe canopy. The younger trees were growing at a much fasterrate than the older trees. The difference between CO2 effluxfrom the younger and older stems appears to have resulted froma difference in growth respiration rather than a differencein the rate of diffusion of xylem-transported CO2. Key words: Eucalyptus globulus, refixation, stem respiration
Received 19 May 2008; Revised 14 September 2008 Accepted 8 October 2008 相似文献
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