Notice bibliographique
Résumé
Homing of subadult Oldsquaws.--Througha continuing Oldsquaw (Clangula hyemalis) banding and marking program that I have conducted near Churchill, Manitoba (Alison 1972, unpublished Ph.D. dissertation, Toronto, Univ. of Toronto) it has been possible to identify in flocks of subadult Oldsquaws on the breeding grounds individuals that were reared in the same vicinity the previous year.Such identification included individuals captured as flightless young and marked with nasal saddles (Alison 1975a, Ornithol.Monogr.No. 18) during July and August of 1974, or unmarked birds banded in previous years and recaptured in 1974 and 1975 within the study ponds.Male and female subadults are always distinguishable in the field by plumage (Alison 1975b, Birdbanding 46: 248-250).From 1968 through 1975 a few subadult males appeared briefly on the study area in only 2 years; otherwise all subadults present were females.Subadults were present in all years, the maximum number being 29 (all females) in 1975.Although a few arrived each year in late May together with most of the paired adults, the majority typically appeared in mid-June.Some were present as late as 3 September.None was ever observed paired.The proportion of immature females that returned to the study ponds as subadults is unknown, but of 29 subadult females present in 1975, 4 were reared within 1 km of the recapture sites.The ability to home among subadults of duck species that require 2 or more years to reach sexual maturity has not been published previously.Nonetheless it is well-known that some adult Canada Geese (Branta canadensis), Snow Geese (Chen caerulescens), (Atlantic) Brant (Branta bernicla), and others return to their natal area.Homing by adult anatids has been reported in the Bufflehead (Bucephala albeola) (Erskine 1961, Auk 78: 389-396), Oldsquaws (Alison 1975a), Lesser Scaup (Aythya affinis), Canvasback (Aythya valisineria), and Redhead (Aythya americana) (D.Trauger, pers.comm.), and others as well as among the nondiving species.Perhaps the most remarkable record involved two subadult females, banded as flightless immatures (#s 547-43136 and 547-43145) at the same spot (in the same net) in August 1974 and recaptured together on 25 June 1975 about 4 km from the banding site.These marked birds, which may have been from the same brood and were certainly from the same communal brood, arrived together on the study ponds 23 June 1975 and, when seen later, were always near each other.Another marked subadult female (number 547•3141), captured in 1974 from the same communal brood, was frequently seen in association with these individuals in 1975 and was recaptured 26 June 1975 on the same pond with them.Although we do not know that these individuals migrated and passed the winter of 1974-75 together, it seems doubtful that, had they not done so, they would have reached Churchill together and remained together on the same pond throughout June and July.These observations suggest not only a fidelity to natal territory but also a mutual fidelity among specific individuals in the subadult population.As the pair-bond is especially strong among adult Oldsquaws (Alison 1975a) it is not inconsistent that similar associations occur among subadults, although the purpose of such behavior is unknown.
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 | 0,000 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,001 |
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 ».