Detección de isquemia silente en pacientes hipotiroideos con estudios de perfusión miocárdica nuclear

En la evaluación de los procesos subclínicos de ateroesclerosis se realizan estudios para la detección de isquemia silente (IS) en pacientes hipotiroideos asintomáticos intentando identificar grupos de riesgo. El objetivo de este trabajo es detectar con estudios de perfusión miocárdica spect gatillado (GS) la presencia de isquemia silente, cuantificando la severidad y extensión en población hipotiroidea.Facultad de Ciencias Médica

Detección de isquemia silente en pacientes hipotiroideos con estudios de perfusión miocárdica nuclear

En la evaluación de los procesos subclínicos de ateroesclerosis se realizan estudios para la detección de isquemia silente (IS) en pacientes hipotiroideos asintomáticos intentando identificar grupos de riesgo. El objetivo de este trabajo es detectar con estudios de perfusión miocárdica spect gatillado (GS) la presencia de isquemia silente, cuantificando la severidad y extensión en población hipotiroidea.Facultad de Ciencias Médica

Detección de isquemia silente en pacientes hipotiroideos con estudios de perfusión miocárdica nuclear

En la evaluación de los procesos subclínicos de ateroesclerosis se realizan estudios para la detección de isquemia silente (IS) en pacientes hipotiroideos asintomáticos intentando identificar grupos de riesgo. El objetivo de este trabajo es detectar con estudios de perfusión miocárdica spect gatillado (GS) la presencia de isquemia silente, cuantificando la severidad y extensión en población hipotiroidea.Facultad de Ciencias Médica

Exploratory assessment of anchovy 27.9a-west using a surplus production model.

The aim of this WD was to explore surplus production models to assess the western component of the anchovy 27.9a stock. Models were fitted to catch per quarter or semester (1991 – 2021) and to one biomass index, the spring acoustic survey (1999 – 2021), or two biomass indices, the acoustic survey and the autumn groundfish survey (1991 – 2018) using SPiCT. Various assumptions regarding the shape of the production curve, the initial biomass depletion and the intrinsic growth rate of the population were combined such that models varied from nearly unconstrained (more complex) to increasingly constrained (less complex). Bi-annual catch data and two survey indices lead to a higher number of convergent models. Several models passed all ICES criteria to accept a SPiCT assessment, except for a higher level of uncertainty in F/FMSY than the agreed one for long-lived stocks. A model assuming a Schaefer production curve, a prior on r from a meta-analysis and, an initial depletion rate of 80%, showed better retrospective analysis, survey hindcast cross-validation and convergence performance than other candidate models. The results indicated that F/FMSY was below 1 across most of the period, B/BMSY fluctuated well below 1 until 2010 and above 1 since 2016. The present results may be considered for further work in a benchmark workshop

Revision of the life history parameters (proportion of mature and mean weights at age) for the Iberian (south) sardine stock (ICES 8c and 9a)

Maturity and stock weights at age used in sardine assessment up to 2012 were obatined from (Portuguese and Spanish) spring acoustic surveys biological data. Following a recommendation of the WGANSA, the possible alternative use of the Daily Egg Production Method (DEPM) surveys to estimate maturity at age was evaluated, and a revision of these maturity ogives was undertaken for the last benchmark assessment (Silva et al. 2011, WKPELA 2012), the WG having decided that DEPM maturity ogives should be used in the assessment, and for years with no DEPM survey, 80% of fish mature would be assumed at age 1 (corresponding approximately to the historical mean of DEPM ogives), and for simplicity, 100% of fish are mature at age 2. But these estimates were obtained including information from both DEPM and acoustic surveys: maturity data from the DEPM for each stratum and year were combined to obtain stock estimates, using abundances at age from acoustic surveys as weighting factors; however, in most years, 1-2 months lagged between the two surveys in W and S strata. Revision of weights at age could not be carried out in 2012 due to time constraints, but the WGHANSA believes that it makes more sense that both life history parameters be derived from the same surveys. This WD describes the revision of both maturity and stock weights at age estimates, based uniquely on the DEPM surveys

Reference points for the Iberian sardine stock (ICES areas VIIIc and IXa)

Three Yield-Per-Recruit/stock-recruitment approaches (deterministic, stochastic with plotMSY and stochastic with HCS) were used to explore reference points for the management of the Iberian sardine. The sensitivity of reference points was evaluated in relation to alternative scenarios of productivity, growth and selectivity. Growth and selectivity scenarios had a small impact on stock projections whereas productivity scenarios were very influential. The three approaches gave coherent results, but the approach using HCS, assuming uncertainty in stock biology and recruitment dynamics, was preferred to derive reference points for sardine. In this approach, the risks of the stock fa lling below some low biomass level can also be taken into account. This possibility was considered to be useful in the case of the sardine for which exploitation at maximum YPR or F0.1 resulted in values above historical exploitation and higher than Floss, therefore unsuitable as precautionary management targets. Bloss (306 thousand t) is proposed as a proxy for Blim but given no indication that recruitment is impaired below this biomass level, the group considers that the level of risk of falling below this candidate for Blim acceptable in the evaluation of a management plan should be higher than the standard ICES value (5%).The stock productivity has declined over time; therefore a scenario of low productivity was assumed (recruitment in the period 1993-2010). Under this productivity scenario, the Fmsy value for the sardine stock is 0.34, a value associated with a high probability (45%) of the biomass falling below the proposed Blim and therefore, incompatible with precautionary considerations. The WG proposes an F= 0.27, corresponding to a Prob(B<Blim)<15% under equilibrium, as the best available candidate for an F management target (proxy for Fmsy) assuming the low productivity scenario (since 1993) will continue in the future. This F provides high yield conditional to a low probability that the biomass falls below Blim=Bloss in equilibrium, thus incorporating precautionary considerations