Notice bibliographique
Résumé
SANDHILL CRANES (Grus canadensis) occur regularly on several prairies, lake margins, and marshes in northern Florida, but to our knowledge no previous attempt has been made to determine the size, source, and subspecies of these populations.This paper reports recent data on migration time and routes and the nesting and wintering grounds of the Sandhill Crane populations in northern Florida.METHODS AND MATERIALS Between 1963 and 1971 we visited all localities in Florida north of Marion County and east of the Aucilla River (Figure 1) where Sandhill Cranes were known or believed to occur.From 1968 through 1971 these places were rechecked by airplane, surface vehicle, or on foot.We visited Pinhook Swamp (a part of the Okefenokee Swamp) only during 1963 and 1964 in connection with another study.We did not census west of the Aucilla River because cranes are rare there (Howell, 1932; Weston, 1965), nor did we survey the Florida peninsula south of Alachua County because the species nests so widely there that the land area to be searched would necessitate a study of greater scope than we were able to undertake.We obtained some unpublished information (H.M. Stevenson and R. L. Thompson, pers.comm.) on a small population in Liberty County near Sumatra.Capturing and marking.--In the winter of 1967-68, 24 cranes captured on Orange Grove Lake Prairie and 26 captured on Paynes Prairie were tagged with light green patagial tags (KnowIron et al., 1964), banded with size 8 or 9 standard U.S. Fish and Wildlife Service bands above the distal joint of the tibia, and released at the capture sites.In the winters of 1968-69 and 1969-70, 119 more cranes were banded and colormarked on Paynes Prairie, for a total of 169 wing-marked and banded for this study.Cranes were caught by a technique similar to that used to take wild Turkeys (Meleagrls gallopavo) (Williams, 1966).On prebaited sites they were fed whole yellow corn (maize) dampened and dusted with powdered alpha-chloralose at dosage rates between 0.35 and 1.50 g per standard cup of bait.The most effective dosage was 0.40 to 0.45 g of the drug per cup of corn.Narcotized cranes were held in large cardboard boxes or in burlap feed sacks with their legs securely taped together at the distal end of the tarsometatarsus.They were released at the capture sites after they recovered, usually the day after capture, but a few heavily drugged birds slept for 2 days.Sightings and recoveries of marked cranes.--Wealerted potential observers to watch for color-marked cranes and sent letters explaining the study to state and federal conservation agencies and private individuals in the eastern and midwestern United States and Canadian provinces where Sandhill Cranes were known (Walkinshaw, 1949) to nest or occur in migration.Reports of 160 sightings of marked cranes north of Florida have been received and four bands have been recovered as this is being written (April 1971).About 60 other cranes wearing bands on the lower tibia were reported in the same areas that colormarked birds were seen and probably also refer to our birds, but only reports of green color-marked cranes are used in this report (Tables 1 and 2).Four bands were recovered through the facilities of the Bird Banding Office, Bureau of Sport Fisheries and Wildlife.
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 | 0,000 |
| 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 | 0,001 | 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) | 0,009 | 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 ».