8 research outputs found

    The Effects of Governmental Protected Areas and Social Initiatives for Land Protection on the Conservation of Mexican Amphibians

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    Traditionally, biodiversity conservation gap analyses have been focused on governmental protected areas (PAs). However, an increasing number of social initiatives in conservation (SICs) are promoting a new perspective for analysis. SICs include all of the efforts that society implements to conserve biodiversity, such as land protection, from private reserves to community zoning plans some of which have generated community-protected areas. This is the first attempt to analyze the status of conservation in Latin America when some of these social initiatives are included. The analyses were focused on amphibians because they are one of the most threatened groups worldwide. Mexico is not an exception, where more than 60% of its amphibians are endemic. We used a niche model approach to map the potential and real geographical distribution (extracting the transformed areas) of the endemic amphibians. Based on remnant distribution, all the species have suffered some degree of loss, but 36 species have lost more than 50% of their potential distribution. For 50 micro-endemic species we could not model their potential distribution range due to the small number of records per species, therefore the analyses were performed using these records directly. We then evaluated the efficiency of the existing set of governmental protected areas and established the contribution of social initiatives (private and community) for land protection for amphibian conservation. We found that most of the species have some proportion of their potential ecological niche distribution protected, but 20% are not protected at all within governmental PAs. 73% of endemic and 26% of micro-endemic amphibians are represented within SICs. However, 30 micro-endemic species are not represented within either governmental PAs or SICs. This study shows how the role of land conservation through social initiatives is therefore becoming a crucial element for an important number of species not protected by governmental PAs

    Chronic Stress Among Latino Day Laborers

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    Latino day laborers endure many hardships as they struggle to adjust as an immigrant community in the United States. This study sought to identify the extent of chronic stress reported by day laborers and the factors associated with stress. 725 Latino day laborers were interviewed. The most reported sources of stress were having immigration-related problems, not having enough money to cover basic needs, having no savings and having work hours change for the worse. Higher chronic stress was associated with homelessness (p < .001) and HIV-related risk behaviors in the previous twelve months (p < .05). In addition, chronic stress was found to be higher among respondents reporting incomes of 5,000to5,000 to 10,000 (p = 0.007) and still higher among respondents reporting incomes greater than $10,000 (p < 0.001) compared to those in the lowest income level. Lower chronic stress was associated with having a partner (p < .05) or being single (p = .001) compared to being married. Addressing the stress experienced by day laborers is necessary to prevent potential negative health and mental health consequences among this population

    Velvety fruit-eating bat (Enchistenes hartii; Phyllostomidae) in Morelos, Mexico

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    We present here the first record of the velvety fruit-eating bat (Enchistenes hartii; Phyllostomidae) for the state of Morelos, Mexico. Our record gives more insight into the range of the species in Mexico, extending it ca. 52 km into central Mexico, east of the closest reported locality, Malinaltenango, in the state of MĂ©xico. We provide external and cranial measurements of one individual, and information about the habitat where it was captured and other species of bats recorded at the same locality

    Experiment and Theoretical Terms from an Operational Point of view

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    The thesis of the "theory ladenness" of observation leads to an antinomy. In order to solve this antinomy a technical operationalism is sketched, according to which theories should in principle not contain anything that cannot be reduced to technical procedures. This implies the rejection of Quine's underdeterminacy thesis and of many views about the theoretical-observational distinction, e.g. neopositivistic views, van Fraassen's view, Sneed-StegmĂŒller's view. Then I argue for the following theses: 1. All scientific concepts are theory laden in the sense that they allow us to anticipate possible experiences, but they have to be in principle fully observable, i.e. integrally convertible into operational-technical applications. 2. The observation/theory distinction can be maintained as a historical one: what is observable depends on the instruments that are available at any stage of the development of science. 3. In principle theoretical entities are empirically real in Hacking's sense. However, some aspects of Hacking's realism are to be criticized. Theoretical entities are to be resolved into the totality of the interrelated properties accessible to us by means of theoretical points of view embodied in scientific instruments

    The impact of surgical delay on resectability of colorectal cancer: An international prospective cohort study

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    AimThe SARS-CoV-2 pandemic has provided a unique opportunity to explore the impact of surgical delays on cancer resectability. This study aimed to compare resectability for colorectal cancer patients undergoing delayed versus non-delayed surgery.MethodsThis was an international prospective cohort study of consecutive colorectal cancer patients with a decision for curative surgery (January-April 2020). Surgical delay was defined as an operation taking place more than 4 weeks after treatment decision, in a patient who did not receive neoadjuvant therapy. A subgroup analysis explored the effects of delay in elective patients only. The impact of longer delays was explored in a sensitivity analysis. The primary outcome was complete resection, defined as curative resection with an R0 margin.ResultsOverall, 5453 patients from 304 hospitals in 47 countries were included, of whom 6.6% (358/5453) did not receive their planned operation. Of the 4304 operated patients without neoadjuvant therapy, 40.5% (1744/4304) were delayed beyond 4 weeks. Delayed patients were more likely to be older, men, more comorbid, have higher body mass index and have rectal cancer and early stage disease. Delayed patients had higher unadjusted rates of complete resection (93.7% vs. 91.9%, P = 0.032) and lower rates of emergency surgery (4.5% vs. 22.5%, P ConclusionOne in 15 colorectal cancer patients did not receive their planned operation during the first wave of COVID-19. Surgical delay did not appear to compromise resectability, raising the hypothesis that any reduction in long-term survival attributable to delays is likely to be due to micro-metastatic disease
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