ESTIMATING THE STOCK OF GLASS EELS IN AN ESTUARY BY MARK-RECAPTURE EXPERIMENTS USING VITAL DYES

Glass eels (Anguilla anguilla) arriving after the fishing season in the Vilaine estuary (France) were caught by boat and at a trapping ladder located at a blocking dam upstream in the estuary. They were marked with Bismarck brown, rhodamine B or neutral red, and released into the estuary. The effect of marking on behaviour, mortality and recapture differed according to the dye and concentration used. The glass eels also differed in response to marking according to their origin. Estuarine glass eels were clearly desynchronized in their selective tidal stream transport and left the release area after a few tidal cycles. Trapped glass eels were less sensitive to marking. They remained in the release area and were recaptured in larger number both in the trapping ladder and in the estuary. These results supported a model of two behavioral fractions in the estuary: flow-carried migrants and active glass eels with stronger rheotactic behaviour. The proportion of active glass eels in the estuary shifted from none for the two weeks after the fishery closure, to 10% value of the total stock. At the trapping ladder, the migration ended in June each year, while a large stock was still present in the estuary. These observations favour the interpretation of a short duration of the active phase at this site followed by the transition towards a more benthic behavior. The daily efficiency of the trapping ladder was calculated as 4% of the active stock from both stock estimations and average recapture rate. This value was consistent with the low annual efficiency of the trapping ladder, calculated as 30% of the estuarine stock of glass eels that arrived after the fishing season

The Neuroprotective Disease-Modifying Potential of Psychotropics in Parkinson's Disease

Neuroprotective treatments in Parkinson's disease (PD) have remained elusive. Psychotropics are commonly prescribed in PD without regard to their pathobiological effects. The authors investigated the effects of psychotropics on pathobiological proteins, proteasomal activity, mitochondrial functions, apoptosis, neuroinflammation, trophic factors, stem cells, and neurogenesis. Only findings replicated in at least 2 studies were considered for these actions. Additionally, PD-related gene transcription, animal model, and human neuroprotective clinical trial data were reviewed. Results indicate that, from a PD pathobiology perspective, the safest drugs (i.e., drugs least likely to promote cellular neurodegenerative mechanisms balanced against their likelihood of promoting neuroprotective mechanisms) include pramipexole, valproate, lithium, desipramine, escitalopram, and dextromethorphan. Fluoxetine favorably affects transcription of multiple genes (e.g., MAPT, GBA, CCDC62, HIP1R), although it and desipramine reduced MPTP mouse survival. Haloperidol is best avoided. The most promising neuroprotective investigative priorities will involve disease-modifying trials of the safest agents alone or in combination to capture salutary effects on H3 histone deacetylase, gene transcription, glycogen synthase kinase-3, α-synuclein, reactive oxygen species (ROS), reactive nitrogen species (RNS), apoptosis, inflammation, and trophic factors including GDNF and BDNF

Microrganismos benéficos em biofertilizantes.

"É possível afirmar que o uso de biofertilizantes pode auxiliar no crescimento de diversas culturas agrícolas, além de mitigar muitos dos impactos ambientais negativos dos sistemas agrícolas convencionais."bitstream/item/171456/1/digitalizar0248.pd

Composição química de espécies herbáceas e arbustivas da vegetação secundária consumida por bovinos em pastagens cultivadas no Nordeste paraense.

bitstream/item/27852/1/BPD-71.pdfDisponível também on-line

Sex-specific differences in fit between two different types of body armour: A pilot study

Aim: to assess sex-specific differences in wearability and comfort when wearing body armour.Design: A randomized counter-balanced study.Method: Ten participants (females n = 6, mean height = 167.97 ± 3.67 cm, mean mass = 65.30 ± 10.57 kg: males n = 4, mean height = 82.15 ± 6.98 cm, mean weight = 85.55 ± 9.96 kg) were included following eligibility criteria and assessed against occupational tasks for which they gave subjective feedback when wearing a law enforcement (2.1 kg) and military (6.4 kg) body armour system. Subjective feedback was provided on mannequin sketches and compared between sexes and body armour types. Bond University Human Research Ethics Committee provided ethics approval (RO15803).Results: Greater negative feedback was received, subjectively, from both sexes regarding the military body armour. Female participants recorded areas of most discomfort to include the neck, shoulder, chest, and hip, whilst males recorded areas to be the neck, shoulder, and abdomen. Females reported greater subjective concerns than males regarding body armour fit.Conclusion: With levels of discomfort associated with injury in police officers wearing body armour, the comfort and fit of body armour and differences between sexes must be considered. These differences require consideration when returning injured officers back to work, especially following brachial plexus palsy and meralgia paresthetica injuries.</div

The physical fitness profiles of specialist policing teams

Aim: To profile the fitness of two groups of Australian Specialist Police.Design: Retrospective Cohort StudyMethod: De-identified data of 17 male specialist police officers from two specialist police response groups (Riot Squad (RS) and Police Tactical Group (PTG)) were provided. Data included demographics (age, height, and weight), strength (1 Repetition Maximum (1RM) bench press, deadlift, pull-up + Body Weight (BW), and squat), speed (0-10m acceleration &amp; 10-20m peak velocity), agility (box agility drill), aerobic capacity (30-15 Intermittent Fitness Test) and power (bench throw and countermovement jump).Results: There were no significant differences in demographics, although officers from RS were, on average, older (1.45yrs, p=0.390), shorter (-2.04cm, p=0.15), and lighter (-3.43kg, p=0.55) than PTG officers. PTG officers had significantly greater strength (1RM deadlift = 38.50kg, p= 0.001, 95% CI [17.62-59.38], 1RM squat = 34.00kg, p&lt; 0.001, 95% CI [16.6-51.5], 1RM bench press = 26.83kg, p=0.004, 95% CI [9.8-43.8]) andquicker acceleration (0.11sec, p=0.032, 95% CI [0.01-0.21]) than RS officers. Both groups performed at a level comparable to elite athletes for most other measures.Conclusion: Specialist police possess high levels of aerobic fitness, strength, acceleration, and power, with subtle differences between units, thought to be due to varying occupational roles. This study provides benchmarks for selection, return-to-work practices and maintenance programs for health professionals working within these units

Relações entre atributos de fertilidade e matéria orgânica em solo cultivado com hortaliças em sistemas conservacionistas.

O presente trabalho teve como objetivo identificar possíveis relações entre os atributos de fertilidade e de matéria orgânica em um Latossolo Vermelho Distrófico cultivado com hortaliças em sistemas conservacionistas há seis anos

Effect of different tillage systems on the soil chemical variables under vegetable production.

Abstract 04579