Island in the Stream: Oceanography and Fisheries of the Charleston Bump
Notice bibliographique
Résumé
<em>Abstract</em>.—Commercial landings of yellowfin tuna <em> Thunnus albacares </em>for the period 1975–1998 showed an overall increasing trend while blackfin tuna <em> T. atlanticus </em>landings did not. The landings of yellowfin tuna from 1992 to 1998 were significantly higher (mean = 51.7 mt) than in the previous five year period when there was apparently less directed effort. Maximum landings (67.3 mt) were recorded in 1996. Blackfin tuna landings over this same time period were generally less than 10 mt with a peak of 16 mt in 1986. The seasonality of commercial landings by quarter is presented for a 12 year period (1987–1998). For yellowfin tuna, the second and third quarters consistently had the highest landings while the first quarter was lowest. The second and third quarters combined accounted for greater than 70% of annual landings in every year. The seasonality in landings of blackfin tuna was more pronounced with the third quarter predominating in every year but one. Third quarter landings comprised 42–72% of the annual values while the first quarter was typically less than 5%. An analysis of catch per unit effort for both species over the same period (1987–1998) was conducted using an index developed from the detailed catch records of ten commercial fishers who target pelagic species. Mean values for yellowfin tuna increased significantly from 1992 onward and have oscillated in a small range (2.0–3.0 Kg per hour fishing) through 1998. The values for blackfin tuna were uniformly low and showed little variation. A long term recreational tagging program has resulted in high recapture rates for both species (yellowfin tuna 17.3%, blackfin tuna 10.8%) which may be associated with stable migratory routes or resident populations. An analysis of days at liberty for tag-recaptured fish indicated that 52.6% of all recaptured yellowfin tuna (<EM> N </EM>= 78) were taken within 30 days of release. The corresponding figure for all recaptured blackfin tuna (<EM> N </EM>= 46) was 13%. There is a significantly higher proportion of long term recaptures (up to four years) in blackfin tuna. An examination of the size-frequency distribution for yellowfin tuna indicates that a broad size range is caught in Bermuda waters, however, the catch is dominated by relatively small size classes (modal size = 79 cm FL).
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 | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,007 |
| 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) | 0,000 | 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 ».