Abundance, diversity and seasonality of adult Trichoptera in and around hydroelectric generating stations along the Winnipeg River
Notice bibliographique
Résumé
Hydroelectric generating stations along the Winnipeg River are subject to emergence of large numbers of caddisflies which cause work-related allergies. The purpose of this study was to determine peaks in seasonal and nightly flight activity of the most abundant caddisfly species in and around the generating stations and to recommend management practices to alleviate the problems caused by caddisflies. Modified New Jersey light traps were used to capture caddisflies during the 1997 and 1998 field seasons at hydroelectric generating stations at Great Falls and Seven Sisters. The estimated total number of caddisflies caught over the two-year period was 526,607; 275,806 in 1997 and 250,801 in 1998. The caddisflies belonged to 14 families, 35 genera and at least 76 taxa. The caddisfly flight season, from first capture to last, differed by only one week in the two years. In 1997, caddisflies were collected from 1 June to 16 October, and in 1998 from 26 May to 8 October. Peak flight activity occurred one week earlier at Great Falls than at Seven Sisters. In 1997, approximately 75% of caddisflies were captured during the five-week period from the last week of June to the end of July. The peak flight activity in 1998 occurred from mid-June to mid-July (four weeks), when approximately 80% of the yearly total of caddisflies were captured. Peaks in nightly flight activity were seen between 2300 and 0100, when approximately 62% of the nightly total were captured. Large numbers of caddisflies were captured inside the generating stations. To determine the caddisfly mode of entry, four nights were spent in the stations. Through personal observations and the use of emergence traps, it was established that caddisflies enter the buildings through various openings (i.e. broken windows, under doors) and by emergence from the gate openings inside the gate rooms. Insect particulates, including identifiable caddisfly parts, which were blown into the generating stations through the air-cooling system, were also collected in fine nylon filters attached to the turbine caps in the powerhouses. Changes in management practices are required to decrease the exposure of Manitoba Hydro employees to caddisfly particulate. These must include maintaining and improving sanitation practices and increased vigilance to remove or exclude caddisflies from the generating stations.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,001 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».