Biology and histopathology of Proteocephalus ambloplitis Liedy, 1887, infecting walleye (Stizostedion vitreum vitreum) and yellow perch (Perea flavescens) in Lake of the Woods, Ontario / by Kimberly Blythe Armstrong. --
Notice bibliographique
Résumé
Walleye (Stizostedion vitreum vitreum ) and yellow \nperch (Perea flavescens ) from Lake of the Woods were \nexamined for parenteral Proteocephalus ambloplitis from \nMay to November, 1982 and 1983. One hundred percent of the \nage 1 and older walleye and 74% of the age 1 and older \nyellow perch harboured plerocercoids. In corresponding age \nclasses, walleye were generally 10 times more heavily \ninfected than yellow perch. Mean intensity of live \nplerocercoids increased with age of walleye until age class \n5 then declined significantly in older fish. Intensity increased from a mean of 23 (in age class 0) to a maximum of \n171 in age class 5 and was only 58 in the 7+ age class. Mean \nintensity of plerocercoids increased continuously with the \nage of yellow perch from 2 (age class 0) to a maximum of 20 \nin the 5+ age class. \nAll age classes of walleye (0 to 7+) became infected by \npreying on yellow perch, particularly the young-of-the-year \n(YOY). Small yellow perch became infected by eating copepods \nbut older perch obtained plerocercoids by cannibalism. The \ntransmission of plerocercoids to walleye and yellow perch \nwas greatest during late summer. Young-of-the-year walleye \nand YOY yellow perch first harboured plerocercoids in early August. \nThe liver was the first organ of walleye and yellow \nperch to be invaded by migrating plerocercoids. However, in walleye, the mesenteries ultimately contained the greatest \nproportion of p1erocercoids in age 1 and older fish. The \nliver remained a relatively Important site for plerocercoids \nin all age classes of yellow perch. Relatively few \nplerocercoids were found in the gonads of walleye or yellow \nperch. Walleye fecundity was not correlated with \nplerocercoid intensity. \nNinespine sticklebacks ( Fungitius pungitius ) and \nlogperch (Percina caprodes ) were found to harbour P. \nambloplitis p1erocercoids . These are new host records. \nMigrating plerocercoids caused the greatest \npathological change in the liver of walleye and yellow \nperch. Zones of compressed and necrotic hepatocytes were \nevident adjacent to live, unencapsulated plierocercoids . The \nmesenteries of walleye were often fibrosed in response to \nlarge numbers of invading plerocercoids. The \ngastro-intestinal tract, posterior gonads and associated mesenteries were often compacted with fibrous tissue. \nObstruction of the passage of gametes is possible. \nConstriction of the oviduct may result from the fibrous \nreaction. Also, encapsulated plerocercoids were found in the \nlumen of the oviduct creating a physical barrier. The wall \nof capsules encompassing plerocercoids in walleye was \nrelatively thin (maximum of 90 microns) while in yellow \nperch, it was up to 290 microns thick.
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 distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,003 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 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 tête enseignante, 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 ».