Fine-scale population genetic structure of the eastern Pacific bay pipefish, Syngnathus leptorhynchus
Notice bibliographique
Résumé
Seascapes are complex systems with features that both restrict and enhance dispersal and gene flow among individuals. Understanding factors shaping genetic diversity and genetic population substructure can assist in planning effective conservation areas. Syngnathus leptorhynchus is an eelgrass-dependent fish species ranging from Alaska to Mexico. Pipefish males brood eggs in a specialized brood pouch until their emergence as fully developed young. S. leptorhynchus has a body form that presumably reflects adaptations to mimic Zostera marina L. blades which may, in combination with the provision of prolonged parental care, limit its dispersal potential and promote population subdivision. Syngnathus leptorhynchus were collected from 17 localities iii Barkley Sound, Vancouver Island, British Columbia. A total of 156 alleles were detected with 5 microsatellite loci with an average of 31 (STDV 13.9) alleles per population. Genetic diversity was high and the observed multi-locus heterozygosity was 0.91. Genetic diversity and allelic richness were lowest in North Barkley Sound encompassing the Broken Group Islands, Pacific Rim National Park Reserve (BGI). Pipefish genetic differentiation revealed patterns of local heterogeneity at small spatial scales within the BGI archipelago, but regional homogeneity at larger spatial scales. Genetic differentiation measured over the five loci was weak but statistically significant (Fst = 0.005, P = 0.0001) over a maximum distance between localities of 83 km. Individual pairwise Fst comparisons ranged from 0.00 to 0.017. There was evidence for closed population dispersal consistent with geography and two nascent genetic subpopulations encompassing East Barkley and South/North Barkley Sound. Pipefish at Gibralter Island (BGI) were significantly diverged from other localities. Fjordal environments appeared to restrict pipefish gene flow between the two genetic subpopulations. Archipelagos and deepwater channels restricted pipefish gene flow and increased genetic differentiation. Genetic connectivity of pipefish in localities within the BGI archipelago was restricted and localities were significantly differentiated from each other. Pipefish in two BGI localities, however, revealed unrestricted connectivity and were genetically similar to neighbouring localities outside this oceanographically complex archipelago. Coastal habitats maintain connectivity among pipefish in eelgrass beds located in South/North Barkley Sound and were important in promoting an isolation-by-distance pattern among coastal eelgrass beds. Pipefish genetic neighbourhoods ranged in linear distance from 40-60 kilometres.
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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 | 0,000 | 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) | 0,002 | 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 ».