Dispersion patterns of kin in young-of-the-year Atlantic salmon (Salmo salar L.) in Catamaran Brook, New Brunswick
Notice bibliographique
Résumé
Movement allows organisms to respond to heterogeneity in physical and biological conditions both at the individual and population level. Studying the movement of young stream fishes has proven to be problematic because of the difficulty of tagging small fishes using traditional techniques. In this study, recently developed microsatellite markers were used as a method of tagging individual young-of-the-year (YOY) Atlantic salmon ( Salmo salar L.). First, the association between the local-scale distribution patterns of 81 territorial YOY salmon and their degree of relatedness in a natural stream was tested. No significant association between relatedness and distance at the local scale was found. Focal fish were not more related to their nearest-neighbour (mean r x,y = -0.004) than to randomly selected fish (mean r x,y = 0.005), nor were they more related to their four nearest-neighbours (mean r x,y = -0.01) than to non-neighbours (mean r x,y = -0.007). Second, 97 anadromous adults moving into the stream to spawn, four redd locations, as well as 313 of their offspring were sampled in a 1.6 km reach of Catamaran Brook. The initial dispersal of offspring from the four redd locations and resulting long-range dispersion patterns of families were mapped. The average dispersal distance of 69 YOY salmon from the sampled redd locations ranged from 50--955m downstream, and 9--154m upstream. Five maternal and nine paternal half-sibling families were recaptured over an average dispersion distance (linear distance between the most upstream and most downstream sites of capture) of 1340m and 1018m, respectively. Four full-sibling families were identified with an average dispersion distance of 945m. The redd location (for sampled redds) and the most upstream location of a family (linear distance of the most upstream location of capture to the mouth of the brook) were combined and analysed as one variable. Dispersion distance was significantly, and positively correlated with redd or upstream location, with most families dispersing to the mouth of the brook. Third, alternative mating strategies take place in Atlantic salmon males, whereby both anadromous adults and precocious parr compete for fertilization opportunities with anadromous females. The present study suggests that precocious male parr may have fertilized up to 53% of the 313 sampled YOY salmon. This intensive field sampling allowed for the detection of the initial dispersal from redds and the large-scale dispersion of YOY salmon, which would not have been possible using alternative tagging methods. The results of the present study contributes to the understanding of dispersal and dispersion patterns of YOY salmon in freshwater habitats, and are applicable to the conservation and management of salmonid populations.
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) | 0,000 | 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 | 0,001 | 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 ».