scholarly journals Ticks of the genus Rhipicephalus Koch, 1844 in Senegal: Review host associations, chorology, and associated human and animal pathogens

2021 ◽  
Vol 74 (1) ◽  
pp. 61-69
Author(s):  
Massamba Sylla ◽  
Marc Souris ◽  
Jean-Paul Gonzalez
Keyword(s):  
Climate Change ◽  
Developmental Stages ◽  
Complex Data ◽  
Medical Entomology ◽  
Ecological Zones ◽  
Animal Pathogens ◽  
Tick Distribution ◽  
Vertebrate Hosts ◽  
Host Relationships

Ticks of the genus Rhipicephalus (Acari: Ixodidae) in Senegal were reviewed. The data presented originate from a tick collection maintained at IRD’s Laboratory of Medical Entomology since 1967 and continuously enriched with samples obtained from different vertebrate hosts captured during various projects conducted in Senegal from 1987 to 2007. Fifteen Rhipicephalus tick species were collected and characterized, resulting in 1127 referenced collections. Three species were of the Boophilus subgenus: Rhipicephalus (Bo.) annulatus, Rh. (Bo.) decoloratus and Rh. (Bo.) geigyi. The twelve others were Rh. boueti, Rh. cuspidatus, Rh. evertsi, Rh. guilhoni, Rh. lunulatus, Rh. muhsamae, Rh. sanguineus, Rh. senegalensis, Rh. sulcatus, Rh. tricuspis, Rh. turanicus and Rh. ziemanni. Although there were recent indications that Rh. turanicus should have been considered as part of the Rh. sanguineus s.l. complex, data regarding these two ticks were presented separately. The collection comprised 14,165 tick specimens at different developmental stages. Data concerning their host relationships as well as distribution and seasonal dynamics were also presented. Vertebrate hosts were identified and listed in the different ecological zones of Senegal. The role of the ticks as potential vectors of pathogens has been reviewed. Climate change, causing variations in rainfall and temperature, will impact tick distribution and dynamics. The situation supports the necessity of this inventory of tick populations for (re)emerging tick-borne diseases surveillance and monitoring.

scholarly journals Ticks (Acari: Ixodida) of the genus Haemaphysalis Koch, 1844 in Senegal: a review of host associations, chorology, and identification

Acarologia ◽  
2018 ◽  
Vol 58 (4) ◽  
pp. 928-945
Author(s):  
Massamba Sylla ◽  
Mady Ndiaye ◽  
Marc Souris ◽  
Jean-Paul Gonzalez
Keyword(s):  
Developmental Stages ◽  
Zoonotic Diseases ◽  
Identification Key ◽  
Ecological Zones ◽  
Vertebrate Hosts ◽  
Zoogeographical Region ◽  
Host Associations

The Haemaphysalis genus (Acari, Ixodidae) in Senegal is reviewed. This embodies a summary of specimens collected from vertebrate hosts over three decades. 454 collections were performed over this period (408 from mammals and 46 from birds), representing a total of 5752 ticks in different developmental stages. Seven Haemaphysalis spp. were collected, identified, and inventoried including: H. (Kaiseriana) rugosa, H. (Ornithophysalis) hoodi, H. (Rhipistoma) houyi, as well as four other species belonging to the leachi group, namely H. (Rhipistoma) leachi, H. (Rh.) moreli, H. (Rh.) muhsamae and H. (Rh.) spinulosa. Vertebrate hosts of Haemaphysalis species were identified and listed in different ecological zones of Senegal. An identification key of the haemaphysalids of Senegal is proposed, which is also applicable to the haemaphysalid fauna of the Occidental sub-region of the Afrotropical zoogeographical region. The role of these species as potential vectors of zoonotic diseases in Senegal is also discussed.

scholarly journals Role of Agricultural Diversification in Improving Resilience to Climate Change: An Empirical Analysis with Gaussian Paradigm

2021 ◽  
Vol 13 (17) ◽  
pp. 9539
Author(s):  
Adiqa Kausar Kiani ◽  
Asif Sardar ◽  
Wasim Ullah Khan ◽  
Yigang He ◽  
Abdulbaki Bilgic ◽  
...  
Keyword(s):  
Climate Change ◽  
Agricultural Production ◽  
Social Indicators ◽  
Economic Benefits ◽  
Farm Income ◽  
Ecological Zones ◽  
Agricultural Diversification ◽  
The Impact ◽  
Agro Ecological Zones

Agricultural diversification efforts towards sustainable agriculture generates environmental and economic benefits. Climate change and agricultural production are characterized by a complex cause-effect relationship. In the present study, the primary dataset is collected through an interview-based survey from 410 farmers in 3 districts located in different agro-ecological zones of Punjab, Pakistan. Detailed analysis is conducted by employing the Gaussian treatment effects approach. Results of the study show that the farmers who adopted agricultural diversification to mitigate the impact of climate change were less and insignificantly benefited e.g., on an average of RS 95,260 (US $635) per annum whereas non-adopted farmers lost their farm income on an average of RS 115,750 (US $772) per annum if they had practiced the agricultural diversification. Moreover, determinants of agricultural diversification such as demographic and institutional indicators were significant and larger effects to adopt as compared to social indicators. This study suggests that policies should be designed in the regional context particularly related to the improvement in demographic characteristics and institutional factors such as providing subsidies, training, and awareness to the farmers, particularly to those who practice agricultural diversification. These measures will help to raise the farmers’ adaptive capacity for the adoption of agricultural diversification, and it will enable them to generate tangible benefits by increasing income through adopting sustainable agricultural livelihood.

scholarly journals Environmental variables influence the developmental stages of the citrus leafminer, infestation level and mined leaves physiological response of Kinnow mandarin

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Rab Nawaz ◽  
Nadeem Akhtar Abbasi ◽  
Ishfaq Ahmad Hafiz ◽  
Muhammad Faisal Khan ◽  
Azeem Khalid
Keyword(s):  
Climate Change ◽  
Physiological Response ◽  
Developmental Stages ◽  
Leaf Growth ◽  
Citrus Fruit ◽  
Leaf Size ◽  
Economic Loss ◽  
Tree Age ◽  
Ecological Zones ◽  
Citrus Leafminer

AbstractClimate change has not only exacerbated abiotic stress, but has also rendered external conditions more feasible for pests to spread and infest citrus fruit. Citrus leafminer (Phyllocnistis citrella) is a potential pest that directly feeds the newly sprouted leaves and twigs of all three spring, summer and autumn flushes. Increasing temperatures in spring and autumn, leafminer accrued more heat units or developmental degree days to accelerate the biological stages of its life-cycle, thereby increasing the pressure of infestation. Present work was conducted at three different environmental conditions in Sargodha, Toba Tek Singh (TTS) and Vehari districts of the Punjab province, Pakistan; all three experimental sites were located in different agro-ecological zones. More infestation was recorded in all three flushes at TTS and Vehari than in Sargodha. Overall, more damage was observed due to higher temperatures in TTS and Vehari than in Sargodha. After May–June heat stress, spontaneous vegetative growth continued from July to November, produced newly spouted tender leaves for feeding the leafminer larvae, and was seen more in TTS and Vehari. Leafminer larva prefers to enter young and tender leaves with a maximum entrance in leaves up to 1 cm2 in size while observing no entrance above 3 cm2 of leaf size. Physiological response of leaves primarily attributed to chlorophyll and carotenoid contents, both of which were recorded lower in the mined leaves, thereby reducing leaf photosynthetic activity. Similarly, lower levels of polyphenols and antioxidant activity were also recorded in the mined leaves. The on-tree age of mined leaves of three vegetative flushes of Kinnow plant was also less counted than non-mined leaves. Climate change has affected vegetative phenology and become feasible for pests due to extemporaneous leaf growth, particularly leafminer, and eventually causes economic loss by supplying low carbohydrates either to hanging fruits or next-season crops.

The Role of Late-Night Infotainment Comedy in Communicating Climate Change Consensus

2019 ◽  
Author(s):  
Edward John Roy Clarke ◽  
Anna Klas ◽  
Joshua Stevenson ◽  
Emily Jane Kothe
Keyword(s):  
Climate Change ◽  
Policy Support ◽  
Mitigation Policy ◽  
Behavioural Intentions ◽  
Late Night ◽  
Mitigation And Adaptation ◽  
Climate Action ◽  
Adaptation Policies ◽  
Diverse Audience

Climate change is a politically-polarised issue, with conservatives less likely than liberals to perceive it as human-caused and consequential. Furthermore, they are less likely to support mitigation and adaptation policies needed to reduce its impacts. This study aimed to examine whether John Oliver’s “A Mathematically Representative Climate Change Debate” clip on his program Last Week Tonight polarised or depolarised a politically-diverse audience on climate policy support and behavioural intentions. One hundred and fifty-nine participants, recruited via Amazon MTurk (94 female, 64 male, one gender unspecified, Mage = 51.07, SDage = 16.35), were presented with either John Oliver’s climate change consensus clip, or a humorous video unrelated to climate change. Although the climate change consensus clip did not reduce polarisation (or increase it) relative to a control on mitigation policy support, it resulted in hyperpolarisation on support for adaptation policies and increased climate action intentions among liberals but not conservatives.

Development as Self-Interest

2018 ◽  
Author(s):  
Sarah Blodgett Bermeo
Keyword(s):  
Climate Change ◽  
Developing Countries ◽  
Foreign Aid ◽  
Climate Change Adaptation ◽  
Trade Agreements ◽  
Self Interest ◽  
Adaptation And Mitigation

This chapter introduces the role of development as a self-interested policy pursued by industrialized states in an increasingly connected world. As such, it is differentiated from traditional geopolitical accounts of interactions between industrialized and developing states as well as from assertions that the increased focus on development stems from altruistic motivations. The concept of targeted development—pursuing development abroad when and where it serves the interests of the policymaking states—is introduced and defined. The issue areas covered in the book—foreign aid, trade agreements between industrialized and developing countries, and finance for climate change adaptation and mitigation—are introduced. The preference for bilateral, rather than multilateral, action is discussed.

scholarly journals Individualist–Collectivist Differences in Climate Change Inaction: The Role of Perceived Intractability

2019 ◽  
Vol 10 ◽  
Author(s):  
Peng Xiang ◽  
Haibo Zhang ◽  
Liuna Geng ◽  
Kexin Zhou ◽  
Yuping Wu
Keyword(s):  
Climate Change

Fostering climate change consensus: The role of intimacy in group discussions

2021 ◽  
pp. 096366252110206
Author(s):  
Lyn M. van Swol ◽  
Emma Frances Bloomfield ◽  
Chen-Ting Chang ◽  
Stephanie Willes
Keyword(s):  
Climate Change ◽  
Group Discussion ◽  
Group Consensus ◽  
Group Discussions ◽  
Self Disclosure ◽  
Group Attraction ◽  
Climate Change Information ◽  
To Come ◽  
Collective Engagement

This study examined if creating intimacy in a group discussion is more effective toward reaching consensus about climate change than a focus on information. Participants were randomly assigned to either a group that spent the first part of an online discussion engaging in self-disclosure and focusing on shared values (intimacy condition) or discussing information from an article about climate change (information condition). Afterward, all groups were given the same instructions to try to come to group consensus on their opinions about climate change. Participants in the intimacy condition had higher ratings of social cohesion, group attraction, task interdependence, and collective engagement and lower ratings of ostracism than the information condition. Intimacy groups were more likely to reach consensus, with ostracism and the emotional tone of discussion mediating this effect. Participants were more likely to change their opinion to reflect that climate change is real in the intimacy than information condition.

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