23 research outputs found

    Impact des Déchets Plastiques sur les Pâturages Urbains et Péri-urbains de la Ville de Dori, Région du Sahel : cas des Ruminants Domestiques

    Get PDF
    Les pâturages naturels constituent la principale ressource alimentaire des ruminants dans la zone urbaine et pĂ©ri-urbaine de Dori. Ces pâturages naturels sont non seulement insuffisants pour les animaux mais aussi polluĂ©s par les sachets plastiques. Cette insuffisance alimentaire (quantitative et qualitative) amène les ruminants Ă  ingĂ©rer des sachets plastiques. Notre Ă©tude avait pour objectif gĂ©nĂ©ral d’étudier la prĂ©valence de l’ingestion des sachets plastiques chez les ruminants (bovins, caprins et ovins). Elle s’est dĂ©roulĂ©e de fĂ©vrier Ă  juin 2021 par une collecte alĂ©atoire de donnĂ©es Ă  l’abattoir sur 600 Ă©chantillons de ruminants domestiques : 200 bovins, 200 caprins et 200 ovins. Nos rĂ©sultats ont rĂ©vĂ©lĂ© que la prĂ©valence de l’ingestion des sachets n’est pas liĂ©e Ă  l’espèce: 31,5% chez les ovins, 30% chez les bovins et 23% chez les caprins (p = 0,131). Cette prĂ©valence n’est pas Ă©galement liĂ©e au sexe: 30% chez les femelles contre 26% chez les mâles (p = 0,379). Par ailleurs, les poids des sachets ingĂ©rĂ©s variaient significativement d’une espèce Ă  l’autre (p < 0,001). Ainsi les bovins et ovins avaient tendance Ă  en consommer plus que les caprins (p < 0,05). Les poids vifs et carcasses des animaux ayant ingĂ©rĂ©s des sachets plastiques sont sensiblement Ă©gaux Ă  ceux qui n’en ont pas ingĂ©rĂ©s. Notre Ă©tude suggère que des dispositions particulières soient prises, notamment l’élevage en stabulation et la sensibilisation Ă  l’usage et gestion des sachets dans les villes.   Natural pastures are the main alimentary resource for ruminants in the urban and peri-urban area of Dori. These natural pastures are not only insufficient for the animals but also polluted by plastic bags. This food insufficiency (quantitative and qualitative) leads ruminants to ingest plastic bags. The general objective of our study was to investigate the prevalence of plastic bag ingestion in ruminants (cattle, goats and sheep). It was conducted from February to June 2021 through random data collection at the abattoir on 600 samples of domestic ruminants: 200 cattle, 200 goats and 200 sheep. Our results revealed that the prevalence of plastic ingestion is not related to species: 31.5% in sheep, 30% in cattle and 23% in goats (p = 0.131). This prevalence was also not linked to sex: 30% in females versus 26% in males (p = 0.379). Furthermore, the weights of the plastic bags ingested varied significantly between species (p < 0.001). Cattle and sheep tended to consume more than goats (p < 0.05). The live and carcass weights of animals that ingested plastic bags were approximately equal to those that did not. Our study suggests that special measures should be taken, including stall breeding and sensitisation on the use and management of bags in cities

    Impact des Déchets Plastiques dans l’Alimentation des Ruminants Domestiques: cas de l’Élevage Urbain et Périurbain de la Ville de Dori, Région du Sahel

    Get PDF
    Les pâturages naturels constituent la principale ressource alimentaire des ruminants dans la zone urbaine et pĂ©ri-urbaine de Dori. Ces pâturages naturels sont non seulement insuffisants pour les animaux mais aussi polluĂ©s par les sachets plastiques. Cette insuffisance alimentaire quantitative et qualitative amène les ruminants Ă  ingĂ©rer des sachets plastiques. La presente Ă©tude avait pour objectif gĂ©nĂ©ral d’étudier la prĂ©valence de l’ingestion des sachets plastiques chez les ruminants, notamment des bovins, caprins et ovins. Elle s’est dĂ©roulĂ©e de fĂ©vrier Ă  juin 2021 par une collecte alĂ©atoire de donnĂ©es Ă  l’abattoir de Dori lors d’une Ă©tude tranversale sur un Ă©chantillon de 600 ruminants domestiques : 200 bovins, 200 caprins et 200 ovins. Les rĂ©sultats ont rĂ©vĂ©lĂ© que la prĂ©valence de l’ingestion des sachets n’est pas liĂ©e Ă  l’espèce: 31,5% chez les ovins, 30% chez les bovins et 23% chez les caprins (p = 0,131). Cette prĂ©valence n’est pas Ă©galement liĂ©e au sexe: 30% chez les femelles contre 26% chez les mâles (p = 0,379). Par ailleurs, les poids des sachets ingĂ©rĂ©s variaient significativement d’une espèce Ă  l’autre (p < 0,001). Ainsi les bovins et ovins avaient tendance Ă  en consommer plus que les caprins (p < 0,05). Les animaux qui ingĂ©raient une quantitĂ© de sachets infĂ©rieure Ă  100 g Ă©taient plus nombeux que ceux en consommaient plus (p < 0,001). Ainsi, l’ingestion n’a pas eu d’effet sur les poids vifs et carcasses des animaux ayant ingĂ©rĂ©s des sachets plastiques. L’étude suggère que des dispositions particulières soient prises, notamment l’élevage en stabulation et la sensibilisation Ă  l’usage et Ă  une meilleure gestion des sachets plastiques dans la commune de Dori.   Natural pastures are the main alimentary resource for ruminants in the urban and peri-urban area of Dori. These natural pastures are not only insufficient for the animals but also polluted by plastic bags. This quantitative and qualitative food insufficiency leads ruminants to ingest plastic bags. The general objective of this study was to investigate the prevalence of plastic bag ingestion in ruminants, including cattle, goats and sheep. It was conducted from February to June 2021 through random data collection at the Dori abattoir during a cross-sectional study on a sample of 600 domestic ruminants: 200 cattle, 200 goats and 200 sheep. The results revealed that the prevalence of plastic ingestion is not related to species: 31.5% in sheep, 30% in cattle and 23% in goats (p = 0.131). This prevalence was also not linked to sex: 30% in females versus 26% in males (p = 0.379). Furthermore, the weights of the plastic bags ingested varied significantly between species (p < 0.001). Cattle and sheep tended to consume more than goats (p < 0.05). Animals that consumed less than 100 g of plastic wastes were more numerous than those that consumed more (p < 0.001). Thus, ingestion had no effect on the live and carcass weights of animals that ingested plastic bags. The study suggests that special measures should be taken, including stall breeding and sensitisation on the use and better management of bags in the Dori commune

    Impact des Déchets Plastiques sur les Pâturages Urbains et Péri-urbains de la Ville de Dori, Région du Sahel : cas des Ruminants Domestiques

    Get PDF
    Les pâturages naturels constituent la principale ressource alimentaire des ruminants dans la zone urbaine et pĂ©ri-urbaine de Dori. Ces pâturages naturels sont non seulement insuffisants pour les animaux mais aussi polluĂ©s par les sachets plastiques. Cette insuffisance alimentaire (quantitative et qualitative) amène les ruminants Ă  ingĂ©rer des sachets plastiques. Notre Ă©tude avait pour objectif gĂ©nĂ©ral d’étudier la prĂ©valence de l’ingestion des sachets plastiques chez les ruminants (bovins, caprins et ovins). Elle s’est dĂ©roulĂ©e de fĂ©vrier Ă  juin 2021 par une collecte alĂ©atoire de donnĂ©es Ă  l’abattoir sur 600 Ă©chantillons de ruminants domestiques : 200 bovins, 200 caprins et 200 ovins. Nos rĂ©sultats ont rĂ©vĂ©lĂ© que la prĂ©valence de l’ingestion des sachets n’est pas liĂ©e Ă  l’espèce: 31,5% chez les ovins, 30% chez les bovins et 23% chez les caprins (p = 0,131). Cette prĂ©valence n’est pas Ă©galement liĂ©e au sexe: 30% chez les femelles contre 26% chez les mâles (p = 0,379). Par ailleurs, les poids des sachets ingĂ©rĂ©s variaient significativement d’une espèce Ă  l’autre (p < 0,001). Ainsi les bovins et ovins avaient tendance Ă  en consommer plus que les caprins (p < 0,05). Les poids vifs et carcasses des animaux ayant ingĂ©rĂ©s des sachets plastiques sont sensiblement Ă©gaux Ă  ceux qui n’en ont pas ingĂ©rĂ©s. Notre Ă©tude suggère que des dispositions particulières soient prises, notamment l’élevage en stabulation et la sensibilisation Ă  l’usage et gestion des sachets dans les villes.   Natural pastures are the main alimentary resource for ruminants in the urban and peri-urban area of Dori. These natural pastures are not only insufficient for the animals but also polluted by plastic bags. This food insufficiency (quantitative and qualitative) leads ruminants to ingest plastic bags. The general objective of our study was to investigate the prevalence of plastic bag ingestion in ruminants (cattle, goats and sheep). It was conducted from February to June 2021 through random data collection at the abattoir on 600 samples of domestic ruminants: 200 cattle, 200 goats and 200 sheep. Our results revealed that the prevalence of plastic ingestion is not related to species: 31.5% in sheep, 30% in cattle and 23% in goats (p = 0.131). This prevalence was also not linked to sex: 30% in females versus 26% in males (p = 0.379). Furthermore, the weights of the plastic bags ingested varied significantly between species (p < 0.001). Cattle and sheep tended to consume more than goats (p < 0.05). The live and carcass weights of animals that ingested plastic bags were approximately equal to those that did not. Our study suggests that special measures should be taken, including stall breeding and sensitisation on the use and management of bags in cities

    Palpares

    No full text
    Key to species of <i>Palpares</i> recorded from West Africa <p> This key is based on morphological characters to identify specimens of both sexes. Additional characters of the gonarcus-parameres complex are provided to confirm the identification when males are available. For two very close species, <i>P. digitatus</i> and <i>P. umbrosus</i>, we provide the description of the hypandrium internum which is a better differential character than the shape of the male ectoprocts (Prost, 1995).</p> <p>1. Dorsal surface of thorax yellow with a conspicuous dark longitudinal stripe....................................... 2</p> <p>- Dorsal surface of thorax uniformly or mainly dark, without a longitudinal median dark stripe......................... 6</p> <p> 2. Distal palpomere of labium rounded at apex with palpimacula slit-like, reaching the apex (Fig. 19). Gonarcal bulla large, almost conical. A tuft of long setae present between the parameres (Fig. 31)......................... <i>cephalotes</i> (Fig. 8)</p> <p>- Distal palpomere of labium pointed or truncated at apex....................................................... 3</p> <p> 3. Distal palpomere truncated at apex with the part beyond the palpimacula representing a fifth of its length. Palpimacula small and rounded (Fig. 20). No gonarcal bulla. A row of setae of decreasing length between the parameres (Fig. 32)................................................................................................... <i>obsoletus</i> (Fig. 9)</p> <p>- Distal palpomere pointed at apex with the part beyond the palpimacula short, clearly shorter than the fifth of its length. Palpimacula slit-like. Gonarcal bulla variously developed..........................................................4</p> <p> 4. No pseudo-fringe along the posterior margin of the wings. Distal palpomere of labium enlarged at apex (Fig. 18). Gonarcal bulla ovoid with a backward developed process on each side (Fig. 30)............................. <i>incommodus</i> (Fig. 7)</p> <p>- A conspicuous pseudo-fringe along the posterior margin of the wings............................................ 5</p> <p> 5. Hind wing with apical stripe short, not reaching the level of the pterostigma and separate from the precedent marking by more than three rows of cells. Forewing with the extremity of some longitudinal veins brown, forming a series of curved lines reaching the posterior margin. Distal palpomere of labium with a third of its length enlarged (Fig.17). Gonarcal bulla small and triangular (Fig. 29)....................................................................... <i>radiatus</i> (Figs 4, 5)</p> <p> - Hind wing with apical stripe long, reaching the level of pterostigma and separate from the precedent marking by one or two rows of cells only. Forewing without a series of curved lines along posterior margin. Distal palpomere only very slightly enlarged at apex. (Fig. 15). Gonarcal bulla large, regularly rounded (Figs 26, 27)............... <i>longimaculatus</i> (Figs 1, 2)</p> <p>6. Dorsal surface of thorax uniformly dark....................................................................7</p> <p>- Dorsal surface of thorax dark with pale markings............................................................ 9</p> <p> 7. Hind wing with a large marking at the origin of recurrent vein reaching anteriorly from R to hind margin or nearly so. Distal palpomere of labium rounded at apex with the palpimacula long, reaching the apex (Fig. 23). Male unknown................................................................................................... <i>zebroides</i> (Fig. 10)</p> <p>- Hind wing with only some small dots at the origin of the recurrent vein. Distal palpomere of labium with the part beyond the palpimacula long and truncated (Figs 21, 22)................................................................8</p> <p> 8. Dorsal surfaces of thorax and legs black. Palpimacula round or slightly elongate (Fig. 21). Gonarcal bulla smooth (Fig. 33). Hypandrium internum hook-shaped with the dorsal process shorter than the lateral expansions (Figs 38, 39, 40).................................................................................................. <i>digitatus</i> (Fig. 11)</p> <p> - Dorsal surface of thorax and legs brown. Palpimacula oblong, somewhat slender and slit-like (Fig. 22). Gonarcal bulla slightly rounded (Fig. 34). Hypandrium internum trapezoidal with the dorsal process thin and longer than the lateral expansions (Figs 41, 42, 43)............................................................................. <i>umbrosus</i> (Fig. 12)</p> <p> 9. Thorax brown with posterior half of mesonotum mainly pale yellow. Femora and tibiae yellow. Abdomen yellow. Distal palpomere of labium sharply pointed (Fig. 24). Gonarcus flat with the posterior margin indented. Parameres absent (Figs 35, 36).................................................................................... <i>percheronii</i> (Fig. 13)</p> <p> - Thorax black with yellow markings. Legs black. Abdomen black with dorsal yellow stripe. Distal palpomere of labium rounded at apex (Fig. 25). Parameres tooth-like (Fig. 37)...................................... <i>nigrescens</i> (Fig. 14)</p>Published as part of <i>Akoudjin, Massouroudini & Michel, Bruno, 2011, A new species of Palpares Rambur (Neuroptera: Myrmeleontidae) with an identification key to the species of West Africa, pp. 33-40 in Zootaxa 2792</i> on pages 38-39, DOI: <a href="http://zenodo.org/record/207760">10.5281/zenodo.207760</a&gt
    corecore