Impact of Alcalase Hydrolysis and Simulated Gastrointestinal Digestion on the Release of Bioactive Peptides from Erythrina edulis (Chachafruto) Proteins.

Amidst increasing awareness of diet-health relationships, plant-derived bioactive peptides are recognized for their dual nutritional and health benefits. This study investigates bioactive peptides released after Alcalase hydrolysis of protein from chachafruto (Erythrina edulis), a nutrient-rich South American leguminous plant, focusing on their behavior during simulated gastrointestinal digestion. Evaluating their ability to scavenge radicals, mitigate oxidative stress, and influence immune response biomarkers, this study underscores the importance of understanding peptide interactions in digestion. The greatest contribution to the antioxidant activity was exerted by the low molecular weight peptides with ORAC values for the <3 kDa fraction of HES, GD-HES, and GID-HES of 0.74 ± 0.03, 0.72 ± 0.004, and 0.56 ± 0.01 (µmol TE/mg protein, respectively). GD-HES and GID-HES exhibited immunomodulatory effects, promoting the release of NO up to 18.52 and 8.58 µM, respectively. The findings of this study highlighted the potential of chachafruto bioactive peptides in functional foods and nutraceuticals, supporting human health through dietary interventions.

Vulture culture: dietary specialization of an obligate scavenger.

Individual dietary variation has important ecological and evolutionary consequences. However, it has been overlooked in many taxa that are thought to have homogeneous diets. This is the case of vultures, considered merely as 'carrion eaters'. Given their high degree of sociality, vultures are an excellent model to investigate how inter-individual transmissible behaviours drive individual dietary variation. Here, we combine GPS-tracking and accelerometers with an exhaustive fieldwork campaign to identify the individual diet of 55 griffon vultures (Gyps fulvus) from two Spanish populations that partially overlap in their foraging areas. We found that individuals from the more humanized population consumed more anthropic resources (e.g. stabled livestock or rubbish), resulting in more homogeneous diets. By contrast, individuals from the wilder population consumed more wild ungulates, increasing their dietary variability. Between sexes, we found that males consumed anthropic resources more than females did. Interestingly, in the shared foraging area, vultures retained the dietary preference of their original population, highlighting a strong cultural component. Overall, these results expand the role of cultural traits in shaping key behaviours and call for the need of including cultural traits in Optimal Foraging models, especially in those species that strongly rely on social information while foraging.

Aphid and caterpillar feeding drive similar patterns of induced defences and resistance to subsequent herbivory in wild cotton.

MAIN CONCLUSION: Our results indicate caterpillars and aphids cause similar levels of induced defences and resistance against caterpillars in wild cotton plants. These symmetrical effects are not consistent with patterns predicted by plant defensive signaling crosstalk and call for further work addressing the biochemical mechanisms underpinning these results. Plant-induced responses to attack often mediate interactions between different species of insect herbivores. These effects are predicted to be contingent on the herbivore's feeding guild, whereby prior feeding by insects should negatively impact subsequent feeding by insects of the same guild (induced resistance) but may positively influence insects of a different guild (induced susceptibility) due to interfering crosstalk between plant biochemical pathways specific to each feeding guild. We compared the effects of prior feeding by leaf-chewing caterpillars (Spodoptera frugiperda) vs. sap-sucking aphids (Aphis gossypii) on induced defences in wild cotton (Gossypium hirsutum) and the consequences of these attacks on subsequently feeding caterpillars (S. frugiperda). To this end, we conducted a greenhouse experiment where cotton plants were either left undamaged or first exposed to caterpillar or aphid feeding, and we subsequently placed caterpillars on the plants to assess their performance. We also collected leaves to assess the induction of chemical defences in response to herbivory. We found that prior feeding by both aphids and caterpillars resulted in reductions in consumed leaf area, caterpillar mass gain, and caterpillar survival compared with control plants. Concomitantly, prior aphid and caterpillar herbivory caused similar increases in phenolic compounds (flavonoids and hydroxycinnamic acids) and defensive terpenoids (hemigossypolone) compared with control plants. Overall, these findings indicate that these insects confer a similar mode and level of induced resistance in wild cotton plants, calling for further work addressing the biochemical mechanisms underpinning these effects.

Supporting community health workers during the COVID-19 pandemic: A mixed methods pilot study.

OBJECTIVE: To examine how the COVID-19 Project ECHO program may have influenced the mental health of community health workers (CHWs) from South Texas. The program was designed around case-based learning and mentorship to provide support to CHWs and help them gain expertise to provide services to their communities. DESIGN: An explanatory sequential mixed methods pilot study. SAMPLE: Fifteen CHWs who were enrolled in the program participated in this study. MEASUREMENTS: The Center for Epidemiological Studies-Depression (CES-D) and the Perceived Stress Scale (PSS) were used to measure the differences pre- and post-intervention. Qualitative description was used to explore the experiences of the participating CHWs. RESULTS: The PSS post-test mean (12.53) showed a statistically significant decrease from the pretest mean (17.01) (t (14 = 2.456, p = .028). The CHWs explained that the death of loved ones, feelings of isolation, and work-related concerns influenced their mental health. CHWs expressed that the program provided them with emotional support and resources for their clients. CONCLUSIONS: The impact of the COVID-19 pandemic on disadvantaged and medically underserved areas will be long-lasting; therefore, the need is greater than ever for CHWs to receive mental health support and be able to connect communities with vital resources.

Teaching Person-Centered Care and Interprofessional Collaboration through a Virtual Mental Health World Café: A Mixed Methods IPE Pilot Project.

The purpose of this convergent mixed methods interprofessional education (IPE) pilot project was to help health profession students gain valuable insight about the experiences of people living with mental illness, to help them have a better understanding of person-centered care and have greater knowledge about the importance of interprofessional collaboration. A developmental workgroup which consisted of mental health consumers, four interdisciplinary students, and our team developed and implemented a virtual Mental Health World Café IPE event. Twelve other students attended the World Café event. A paired sample t-test was used to examine group differences between pre- and post-test scores for the Interprofessional Socialization and Valuing Scale and the Texas AHEC Survey measures among the four student leaders and the 12 student participants of the virtual Mental Health World Cafe. We conducted individual interviews with the four student leaders and collected reflective journals from the 12 students who attended the World Café event. We examined to what extent the statistically significant quantitative results supported the qualitative results separately for the student leaders and for the student participants of the virtual World Café. We also examined how both the quantitative and qualitative findings aligned with the key components of the Patient-Centered Care in Interprofessional Collaborative Practice Model. While the project allowed the students to reflect upon how they may apply the principles of person-centered care and interprofessional collaboration, the impact of the consumers on the student's experiences was profound and resulted in widespread engagement of the students who attended the event.

Scavenging in the realm of senses: smell and vision drive recruitment at carcasses in Neotropical ecosystems.

Social information, acquired through the observation of other individuals, is especially relevant among species belonging to the same guild. The unpredictable and ephemeral nature of carrion implies that social mechanisms may be selected among scavenger species to facilitate carcass location and consumption. Here, we apply a survival-modelling strategy to data obtained through the placement and monitoring of carcasses in the field to analyse possible information transmission cascades within a Neotropical scavenger community. Our study highlights how the use of different senses (smell and sight) within this guild facilitates carcass location through the transmission of social information between species with different carrion foraging efficiencies. Vultures with a highly developed sense of smell play a key role in this process, as they are the first to arrive at the carcasses and their presence seems to serve as a visual cue for other species to locate the resource. Our study supports the local enhancement hypothesis within scavengers, whereby individuals locate carcasses by following foraging heterospecifics, also suggesting the importance of the sense of smell in the maintenance of the community structure.

Long-term demographic dynamics of a keystone scavenger disrupted by human-induced shifts in food availability.

Scavenging is a key ecological process controlling energy flow in ecosystems and providing valuable ecosystem services worldwide. As long-lived species, the demographic dynamics of vultures can be disrupted by spatiotemporal fluctuations in food availability, with dramatic impacts on their population viability and the ecosystem services provided. In Europe, the outbreak of bovine spongiform encephalopathy (BSE) in 2001 prompted a restrictive sanitary regulation banning the presence of livestock carcasses in the wild on a continental scale. In long-lived vertebrate species, the buffering hypothesis predicts that the demographic traits with the largest contribution to population growth rate should be less temporally variable. The BSE outbreak provides a unique opportunity to test for the impact of demographic buffering in a keystone scavenger suffering abrupt but transient food shortages. We studied the 42-year dynamics (1979-2020) of one of the world's largest breeding colonies of Eurasian griffon vultures (Gyps fulvus). We fitted an inverse Bayesian state-space model with density-dependent demographic rates to the time series of stage-structured abundances to investigate shifts in vital rates and population dynamics before, during, and after the implementation of a restrictive sanitary regulation. Prior to the BSE outbreak the dynamics was mainly driven by adult survival: 83% of temporal variance in abundance was explained by variability in this rate. Moreover, during this period the regulation of population size operated through density-dependent fecundity and subadult survival. However, after the onset of the European ban, a 1-month delay in average laying date, a drop in fecundity, and a reduction in the number of fledglings induced a transient increase in the impact of fledgling and subadult recruitment on dynamics. Although adult survival rate remained constantly high, as predicted by the buffering hypothesis, its relative impact on the temporal variance in abundance dropped to 71% during the sanitary regulation and to 54% after the ban was lifted. A significant increase in the relative impact of environmental stochasticity on dynamics was modeled after the BSE outbreak. These results provide empirical evidence on how abrupt environmental deterioration may induce dramatic demographic and dynamic changes in the populations of keystone scavengers, with far-reaching impacts on ecosystem functioning worldwide.

Perceptions of Community Health Workers during Two Concurrent National Health Crises: Opioid Use Disorder and COVID-19.

The purpose of this study is to describe the perceptions of community health workers (CHWs), post opioid use disorder training, including the impact of the intervening COVID-19 pandemic, on service delivery and communication. Semi-structured interviews with 10 CHWs were conducted. Categories from the interviews focused on the loss of connections with their clients and how the COVID-19 pandemic caused the CHWs to experience significant interruptions in both their professional and personal lives. The COVID-19 pandemic caused dramatic changes in how CHWs operate within the communities they serve and limiting the interpersonal relationships that are vital to their profession.

DNA barcode analysis of the endangered green turtle (Chelonia mydas) in Mexico1.

Technological and analytical advances to study evolutionary biology, ecology, and conservation of green turtles (Chelonia mydas) are realized through molecular approaches including DNA barcoding. We characterized the usefulness of COI DNA barcodes in green turtles in Mexico to better understand genetic divergence and other genetic parameters of this species. We analyzed 63 sequences, including 25 from green turtle field specimens collected from the Gulf of Mexico and from the Mexican Pacific and 38 already present in the Barcode of Life Data Systems (BOLD). A total of 13 haplotypes were identified with four novel haplotypes from the Pacific Ocean and three novel haplotypes from the Atlantic Ocean. Intraspecific distance values among COI gene sequences by two different models were 0.01, demonstrating that there is not a subdivision for green turtle species. Otherwise, the interspecific distance interval ranged from 0.07 to 0.13, supporting a clear subdivision among all sea turtle species. Haplotype and total nucleotide diversity values of the COI gene reflect a medium genetic diversity average. Green turtles of the Mexican Pacific showed common haplotypes to some Australian and Chinese turtles, but different from the haplotypes of the Mexican Atlantic. COI analysis revealed new haplotypes and confirmed that DNA barcodes were useful for evaluation of the population diversity of green turtles in Mexico.

Limited sexual segregation in a dimorphic avian scavenger, the Andean condor.

Sexual segregation is widely reported among sexually dimorphic species and generally attributed to intraspecific competition. Prey diversity and human activities can reinforce niche segregation by increasing resource heterogeneity. Here, we explored trophic and spatial sexual segregation in the only avian scavenger that exhibits pronounced sexual size dimorphism (up to 50% difference in body mass) and a highly despotic social system, the Andean condor (Vultur gryphus). We predicted that larger and dominant males would exclude smaller and subordinate females from high-quality resources, leading to sexual segregation particularly in human-dominated landscapes showing increased prey diversity. We compared resource use between females and males across six sites in Argentina featuring a range of prey diversity via stable isotopes analysis of molted feathers (n = 141 individuals). We then focused on two sites featuring contrasting levels of prey diversity and quantified assimilated diet via stable isotopes and space use via GPS monitoring (n = 23 and 12 tagged individuals). We found no clear differences in isotopic niche space, individual variation in isotopic signature, or assimilated diet between females and males. However, there were differences in foraging locations between sexes, with females apparently using areas of fewer food resources more frequently than males. Local conditions defined the dynamics of fine-scale sexual differences in foraging sites; yet, unpredictable and ephemeral carrion resources likely prevent segregation by sexes at the landscape scale. Our study highlights complex dynamics of sexual segregation in vultures and the relevancy of analyses under multiple spatial-temporal scales to explore segregation in social species.

Developing and implementing a co-curricular IPE program: AHEC Scholars Program.

As part of a new directive, the Human Resources Services Administration (HRSA) mandated Area Health Education Center (AHEC) Programs across the nation to implement an interprofessional education (IPE) program for health professional students, with the goal of fostering collaborative practice among health profession students and motivating students to work in medically underserved areas post-graduation. The South Texas AHEC Program collaboratively developed and implemented a co-curricular IPE initiative, the AHEC Scholars Program, including didactic and practicum components, focused on the needs of communities in our area. A pre-post quasi-experimental design was used to evaluate the student outcomes related to IPEC Competencies and knowledge and preparation for the practice of core topic areas mandated by HRSA. Student outcomes showed statistically significant improvement in all measures. In order to obtain more detailed accounts of students' practicum experiences, students were asked to complete reflective journals after each practicum. The AHEC Scholars Program provides students with opportunities to work with underserved populations and enables students to explore the benefits of team-based care. This article summarizes the collaborative process of the development and implementation of the AHEC Scholars Program; secondly, it details student outcomes from a 3-month pilot study.

Effect of Adding Guava (Psidium guajava) Epicarp Extract Flour on the Physicochemical, Textural, Colour and Sensory Properties of Frankfurters.

RESEARCH BACKGROUND: The industrial transformation of tropical fruits, and in particular guava, generates a large quantity of by-products that are generally disposed of as organic waste. In these by-products a large quantity of bioactive substances is concentrated, such as carotenoids, which can be used for the partial substitution of nitrites in meat sausages without affecting their physicochemical, colour and conservation characteristics. Although there are some studies in this regard, there is still a lack of research, especially on guava residues, to verify this hypothesis. Therefore, the aim of this study is to investigate the influence of the components of the guava epicarp extract on the physicochemical, textural, colour and sensory properties of frankfurters. EXPERIMENTAL APPROACH: There treatments were investigated (25, 50 and 75% nitrite replacement with guava epicarp flour extract), along with a control treatment without the extract. The physicochemical properties, colour coordinates, and texture parameters were analysed, and a sensory evaluation was also carried out. The treatment that gave the best results was subjected to stability analysis over 30 days. RESULTS AND CONCLUSIONS: The addition of 25% guava epicarp flour extract gave the best results, since it did not affect the colouration of the sausages or their physicochemical and textural properties. Likewise, during the stability analysis over time, the parameters related to fat oxidation were not affected, and final products had a residual nitrite load of (23.6±0.2) mg/kg, lower than the maximum allowed (150 mg/kg). NOVELTY AND SCIENTIFIC CONTRIBUTION: The partial substitution of the nitrites in frankfurters with the carotenoids from the guava epicarp flour added in a mass fraction up to 25% can be a viable alternative to produce sausages with lower content of nitrites, without affecting their colouration or shelf life. This is important for the meat industry, which favours the development of new products using substances of natural origin.

Smart carnivores think twice: Red fox delays scavenging on conspecific carcasses to reduce parasite risk.

The recent SARS-CoV-2 epidemic has highlighted the need to prevent emerging and re-emerging diseases, which means that we must approach the study of diseases from a One Health perspective. The study of pathogen transmission in wildlife is challenging, but it is unquestionably key to understand how epidemiological interactions occur at the wildlife-domestic-human interface. In this context, studying parasite avoidance behaviours may provide essential insights on parasite transmission, host-parasite coevolution, and energy flow through food-webs. However, the strategies of avoiding trophically transmitted parasites in mammalian carnivores have received little scientific attention. Here, we explore the behaviour of red foxes (Vulpes vulpes) and other mammalian carnivores at conspecific and heterospecific carnivore carcasses using videos recorded by camera traps. We aim to determine 1) the factors influencing the probability of foxes to practice cannibalism, and 2) whether the scavenging behaviour of foxes differ when facing conspecific vs. heterospecific carcasses. We found that red foxes were generally reluctant to consume mesocarnivore carrion, especially of conspecifics. When recorded, consumption by foxes was delayed several days (heterospecific carcasses) or weeks (conspecific carcasses) after carcass detection. Other mammalian scavengers showed a similar pattern. Also, meat-borne parasite transmission from wild carnivore carcasses to domestic dogs and cats was highly unlikely. Our findings challenge the widespread assumption that cannibalistic or intra-specific scavenging is a major transmission route for Trichinella spp. and other meat-borne parasites, especially for the red fox. Overall, our results suggest that the feeding decisions of scavengers are probably shaped by two main contrasting forces, namely the nutritional reward provided by carrion of phylogenetically similar species and the risk of acquiring meat-borne parasites shared with these species. This study illustrates how the detailed monitoring of carnivore behaviour is essential to assess the epidemiological role of these hosts in the maintenance and dispersion of parasites of public and animal health relevance.

Opioid Use Disorder ECHO: A Program Evaluation of a Project That Provides Knowledge and Builds Capacity for Community Health Workers in Medically Underserved Areas of South Texas.

Opioid use disorder is a growing public health concern in South Texas. To assist in mitigating the effects of this epidemic, staff produced a program that focused on replicating, modifying, and evaluating the impact of the "Opioid Addiction Treatment ECHO™ (Extension of Community Health Outcomes) for CHWs (community health workers) program" on 26 CHWs practicing in rural and other medically underserved areas through teleconferencing technology. CHWs trained on the topic of substance use disorder concentrated on behavioral health integration with a focus on opioid prescription misuse. The analysis found that knowledge attainment was increased above the pretest means. The ECHO™ model proved to be effective at linking subject matter experts and specialists at an academic "hub" with CHWs in local communities.

Rethinking megafauna.

Concern for megafauna is increasing among scientists and non-scientists. Many studies have emphasized that megafauna play prominent ecological roles and provide important ecosystem services to humanity. But, what precisely are 'megafauna'? Here, we critically assess the concept of megafauna and propose a goal-oriented framework for megafaunal research. First, we review definitions of megafauna and analyse associated terminology in the scientific literature. Second, we conduct a survey among ecologists and palaeontologists to assess the species traits used to identify and define megafauna. Our review indicates that definitions are highly dependent on the study ecosystem and research question, and primarily rely on ad hoc size-related criteria. Our survey suggests that body size is crucial, but not necessarily sufficient, for addressing the different applications of the term megafauna. Thus, after discussing the pros and cons of existing definitions, we propose an additional approach by defining two function-oriented megafaunal concepts: 'keystone megafauna' and 'functional megafauna', with its variant 'apex megafauna'. Assessing megafauna from a functional perspective could challenge the perception that there may not be a unifying definition of megafauna that can be applied to all eco-evolutionary narratives. In addition, using functional definitions of megafauna could be especially conducive to cross-disciplinary understanding and cooperation, improvement of conservation policy and practice, and strengthening of public perception. As megafaunal research advances, we encourage scientists to unambiguously define how they use the term 'megafauna' and to present the logic underpinning their definition.

Visual attention to alcohol labels: an exploratory eye-tracking experiment. / Atención visual hacia el etiquetado de bebidas alcohólicas: un estudio exploratorio basado en eye-tracking.

Current alcohol labelling goes unnoticed by consumers. In addition, EU legislation does not obligate the alcohol industry to include any health warning labels on alcohol packagings. This study aims to explore how the size and design of alcohol by volume (ABV) labels, along with the alcohol strength presented on these labels, influence visual attention toward them. We also examine how label size and alcohol strength influence visual attention toward a health warning label on alcoholic beverages. Using an experimental human laboratory design, we tracked the eye-movements of 64 participants while they viewed beers with different ABV (0.4%, 4.6% vs. 15%). We measured the number of fixations toward ABV labelling which varied in size and design (text-only vs. traffic light). A health warning label was also included on the beers for half of the participants and size was manipulated as a between-subject factor. Results showed strong evidence that the number of fixations was higher when the ABV labels were larger and used a traffic light system. Likewise, we found a higher number of fixations toward larger health warning labels and differences in visual attention depending on the ABV content presented. In conclusion, this study indicates that current alcohol labelling is insufficient to draw the attention of consumers and suggests that future alcohol labelling must be larger and with a graphic design to attract attention.

El actual etiquetado de bebidas alcohólicas pasa desapercibido por los consumidores. Además, la legislación europea exime a la industria de bebidas alcohólicas de incluir advertencias sanitarias en sus envases. Este estudio pretende explorar cómo el tamaño, el diseño y el contenido alcohólico de las bebidas influyen en la atención visual prestada al etiquetado de la graduación alcohólica; y cómo el tamaño y el contenido alcohólico influyen en la atención visual prestada hacia una advertencia sanitaria. Usando un diseño experimental, se monitorizaron los movimientos oculares de 64 participantes mientras visualizaban envases de cerveza con diferente graduación (0,4%, 4,6% vs. 15%). Se midió el número de fijaciones hacia el etiquetado de la graduación alcohólica, manipulando su tamaño y el diseño como factores inter-sujetos. En los envases presentados a la mitad de los participantes se incluyó una advertencia sanitaria, manipulando su tamaño como factor inter-sujeto. Los resultados muestran claras evidencias estadísticas de que el número de fijaciones es superior cuando la graduación alcohólica se muestra con un mayor tamaño y mediante un semáforo nutricional. Asimismo, los resultados relevan un mayor número de fijaciones hacia la advertencia sanitaria cuando esta tiene un tamaño mayor y obtiene diferentes niveles de atención visual dependiendo de la graduación alcohólica del envase. En conclusión, el estudio pone de manifiesto que el actual etiquetado de los envases de bebidas alcohólicas es insuficiente para captar la atención de los consumidores y sugiere que, si se persigue lograr un incremento de la atención prestada, el etiquetado debe mostrarse con un mayor tamaño y con un diseño gráfico.

Scavenging in the Anthropocene: Human impact drives vertebrate scavenger species richness at a global scale.

Understanding the distribution of biodiversity across the Earth is one of the most challenging questions in biology. Much research has been directed at explaining the species latitudinal pattern showing that communities are richer in tropical areas; however, despite decades of research, a general consensus has not yet emerged. In addition, global biodiversity patterns are being rapidly altered by human activities. Here, we aim to describe large-scale patterns of species richness and diversity in terrestrial vertebrate scavenger (carrion-consuming) assemblages, which provide key ecosystem functions and services. We used a worldwide dataset comprising 43 sites, where vertebrate scavenger assemblages were identified using 2,485 carcasses monitored between 1991 and 2018. First, we evaluated how scavenger richness (number of species) and diversity (Shannon diversity index) varied among seasons (cold vs. warm, wet vs. dry). Then, we studied the potential effects of human impact and a set of macroecological variables related to climatic conditions on the scavenger assemblages. Vertebrate scavenger richness ranged from species-poor to species rich assemblages (4-30 species). Both scavenger richness and diversity also showed some seasonal variation. However, in general, climatic variables did not drive latitudinal patterns, as scavenger richness and diversity were not affected by temperature or rainfall. Rainfall seasonality slightly increased the number of species in the community, but its effect was weak. Instead, the human impact index included in our study was the main predictor of scavenger richness. Scavenger assemblages in highly human-impacted areas sustained the smallest number of scavenger species, suggesting human activity may be overriding other macroecological processes in shaping scavenger communities. Our results highlight the effect of human impact at a global scale. As species-rich assemblages tend to be more functional, we warn about possible reductions in ecosystem functions and the services provided by scavengers in human-dominated landscapes in the Anthropocene.

Spatiotemporal variations of organochlorine pesticides in an apex predator: Influence of government regulations and farming practices.

BACKGROUND: Intensification of agricultural practices has caused several negative effects to the environment. The use of fertilizers and pesticides may alter geochemical cycles or cause direct wildlife intoxication. Detrimental effects of organochlorine pesticides (OCPs) have forced the authorities to ban or restrict its use. This study evaluates the variation in levels of OCPs in a sentinel species in relation to changes in government regulations and the spatial configuration of agricultural practices around the nests. METHODS: Between 2003 and 2007, we analysed OCP levels in 256 blood samples of Eurasian Eagle-owl (Bubo bubo) chicks nesting in area of intensive commercial agriculture with historical frequent use of pesticides, in South-eastern Spain. We studied year-to-year variations in OCP concentrations and their relation with land use configuration around raptor nests by Generalized Linear Mixed Models (GLMM). RESULTS: OCPs were detected in 100% samples surveyed in 2003 and 2004, while dropped to 27% in 2005, 6.8% in 2006 and 6.3% in 2007, coinciding with the ban of OCPs. The presence of the main OCPs was related to agricultural practices. In particular, endosulfan and lindane were related to irrigated crops and urban areas, while DDT-related compounds and dieldrin were associated with dry land farming. CONCLUSIONS: OCP concentrations in blood samples of Eurasian Eagle-owls may respond quickly to the implementations of new regulations about the use of agricultural products. This raptor was confirmed as a good sentinel species allowing rapid detection of changes in pesticides use.