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  • 1
    Schlagwort(e): Forschungsbericht
    Materialart: Online-Ressource
    Seiten: 1 Online-Ressource (110 Seiten, 5,26 MB) , Illustrationen, Diagramme
    Sprache: Deutsch
    Anmerkung: Förderkennzeichen BMBF 03G0250A+B. - Verbund-Nummer 01168345 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2021-05-19
    Beschreibung: The maintenance of the endangered Caspian brown trout Salmo trutta caspius populations in Iran depends on its artificial breeding. There is no information on how current hatchery breeding protocol influences effective population size of breeders (Ne), which is a critical parameter to maintain genetic diversity in future generations. The current hatchery protocol (CHP) was comparatively evaluated with a balanced hatchery protocol (BHP), where mixtures of equal amounts of gametes per male and female breeder were used to balance parental contributions to progeny. To evaluate putative differences in viability between families, individual crosses were performed and fertilized ova of different families were mixed to constitute balanced family pools. 1440 alevins were totally sampled in the crosses performed from the 11 breeders. An exclusion-based parentage approach using three polymorphic microsatellite markers unambiguously assigned more than 93% of progeny to a single pair of parents. Significantly different contributions of breeders to progeny were observed in CHP (p〈0.05). The primary constraint on Ne in BHP was the unbalanced contribution of males, which seemed a consequence of sperm competition in mixed fertilization caused by differences in sperm quality. Sperm motility duration was positively correlated with the number of sired progeny by each male. The results illustrate the limitations of the BHP in minimizing the loss of genetic diversity observed in CHP. A protocol based on mixture of equal number of fertilized ova from individual male × female crosses emerged as the best alternative for conservation of Caspian brown trout.
    Beschreibung: Published
    Schlagwort(e): Aquaculture ; Caspian brown trout ; Salmo trutta caspius ; Mixed milt fertilization ; Effective population size ; Sperm competition ; Microsatellite ; Population ; Size
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.393-408
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Publikationsdatum: 2021-05-19
    Beschreibung: En esta investigación se entregan los principales resultados de los análisis correspondientes a la selección de las variables asociadas al poder de pesca y del esfuerzo de las embarcaciones industriales; clasificación de la flota por categorías de embarcación, selección de la categoría estándar y determinación del índice de desarrollo tecnológico de dicha categoría en la s pesquerías de sardina española y anchoveta para el período 1994-96.
    Beschreibung: This research provides the principal results of tests for the selection of variables associated with fishing power and effort to craft industrial classification by type of boat fleet, selection of standard and determination of the technological development in that category in the fisheries of Spanish sardine and anchovy for the period 1994-96.
    Beschreibung: Unpublished
    Schlagwort(e): Pelagic fisheries ; Biomass ; Trap fishing ; Landing statistics ; Recruitment ; Spawning ; Stock assessment ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity ; Sardinops sagax
    Repository-Name: AquaDocs
    Materialart: Report , Refereed , Article
    Format: 60pp.
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
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    Unbekannt
    Instituto de Fomento Pesquero | Valparaíso, Chile
    Publikationsdatum: 2021-05-19
    Beschreibung: El objetivo de este informe es presentar una evaluación de stock de pez espada en el Océano Pacífico Sur Oriental sobre la base de un modelo estadístico de captura a la edad.
    Beschreibung: The purpose of this report is to present a stock assessment of swordfish in the eastern South Pacific Ocean on the basis of a statistical model of catch by age.
    Beschreibung: Unpublished
    Schlagwort(e): Pelagic fisheries ; Sexual maturity ; Stock assessment ; Biomass ; Longlining ; Biological data ; Age determination ; Length-weight relationships
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed , Article
    Format: 32pp. & Anexos
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Publikationsdatum: 2021-05-19
    Beschreibung: The dental morphology of J. pichardi and its relation to dietary habits is described for the first time. This mugilid inhabits the torrential rivers of short course in the Sierra Nevada de Santa Marta, that quickly lead into the Caribbean Sea. Joturus pichardi has heterodont dentition, with different forms that vary according to the tooth containing structure. The observed tooth structure is typical of omnivorous fishes, and consistent with the structure and composition of the diet analyzed. The latter was found dominated by mosses and aquatic macro invertebrates, mainly Chironomidae, a family of Diptera.
    Beschreibung: Published
    Schlagwort(e): Mugilid ; ASFA15::M::Morphology (animal) ; ASFA15::A::Adaptations ; ASFA15::F::Fishes
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Refereed
    Format: pp.463-470
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Publikationsdatum: 2021-05-19
    Beschreibung: En la actualidad, los programas de mercaje son necesarios para estudios de vital importancia en la biología de poblaciones, como los patrones de migración; ya que es un hecho aceptado desde hace casi un siglo que los peces pelágicos especialmente los clupeideos presentan un ciclo migratorio anual, lo que se manifiesta en la pesquería como cambios espaciales y temporales en las zonas de pesca, con las respectivas oscilaciones en la magnitud de sus capturas. Las técnicas de marcación también permiten evaluar la extensión de la distribución geográfica de una población, los patrones de migración, el número total de individuos de una población, sus parámetros de crecimiento y estim aciones de mortalidad.
    Beschreibung: Currently, programs are needed to mercaje critical studies in population biology, such as ”migration patterns” as it is an accepted fact for almost a century that pelagic fishes especially clupeideos present a migration cycle annually, which is manifested in the fishery as spatial and temporal changes in fishing areas, with the respective fluctuations in the magnitude of their catch. Marking techniques also to assess the extent of the geographical distribution of a population, migration patterns, the total number of individuals in a population, their growth parameters and mortality estimates.
    Beschreibung: Unpublished
    Schlagwort(e): Fish meal ; Engraulis ringens
    Repository-Name: AquaDocs
    Materialart: Report , Refereed , Article
    Format: 87pp. & Figuras
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
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    Instituto de Fomento Pesquero | Valparaíso, Chile
    Publikationsdatum: 2021-05-19
    Beschreibung: Este informe entrega como resultado los cálculos de la evaluación de stock de anchoveta, su diagnosis, resultados de un modelo de proyección determinista de capturas para el período 1997-2016 y captura total permisible de 1998.
    Beschreibung: This report provides results calculated by the anchovy stock assessment, diagnosis, results of a deterministic forecasting model for the period 1997-2016 catch and total allowable catch for 1998.
    Beschreibung: Unpublished
    Schlagwort(e): Pelagic fisheries ; Engraulis ringens ; Bathymetric data ; Recruitment ; Trap fishing ; Biomass ; Size-at-age ; Landing statistics ; Fishery resources ; Reproductive behaviour
    Repository-Name: AquaDocs
    Materialart: Report , Refereed , Article
    Format: 53pp. & Figuras
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Publikationsdatum: 2021-05-19
    Beschreibung: El presente informe establece las bases biológicas que permiten identificar estrategias de explotación y umbrales para prevenir la sobreexplotación en el recurso sardina común y anchoveta en Chile.
    Beschreibung: This report provides the biological basis to help identify strategies to prevent exploitation and overfishing thresholds in the common sardine and anchovy resources in Chile.
    Beschreibung: Unpublished
    Schlagwort(e): Sexual maturity ; Biomass ; Acoustic data ; Trap fishing ; Landing statistics ; Recruitment ; Stock assessment ; Trawling ; Longlining ; Age determination ; Size-at-age ; Length-weight relationships ; Salinity
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed , Article
    Format: 84pp. & Anexos
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    Publikationsdatum: 2021-05-19
    Beschreibung: El presente informe establece las bases biológicas que permiten identificar estrategias de explotación y umbrales para prevenir la sobreexplotación en el recurso sardina común y anchoveta en Chile.
    Beschreibung: This report provides the biological basis to help identify strategies to prevent exploitation and overfishing thresholds in the common sardine and anchovy resources in Chile.
    Beschreibung: Unpublished
    Schlagwort(e): Sexual maturity ; Biomass ; Acoustic data ; Trap fishing ; Landing statistics ; Stock assessment ; Bottom trawling ; Age determination ; Size-at-age ; Longlining ; Length-weight relationships ; Salinity ; Trachurus symmetricus ; Trachurus murphyi ; Engraulis ringens ; Strangomera bentincki
    Repository-Name: AquaDocs
    Materialart: Report , Refereed , Article
    Format: 159pp.
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    Publikationsdatum: 2021-05-19
    Beschreibung: El proyecto tiene como objetivo realizar el levantamiento y análisis de la información biológica pesquera de la actividad extractiva de recursos altamente migratorios, tales como pez espada, tiburones y atunes durante la temporada de pesca comercial del año 2004, con el propósito de disponer de información actualizada y oportuna que permita sustentar las medidas de ordenamiento y conservación de estas pesquerías.
    Beschreibung: The project aims to carry out the survey and analysis of biological information extraction activities fishing of highly migratory resources, such as swordfish, shark and tuna for the commercial fishing season of 2004, with the purpose of providing updated information timely and sufficient to sustain the management and conservation measures for these fisheries.
    Beschreibung: Unpublished
    Schlagwort(e): Pelagic fisheries ; Biomass ; Bathymetric data ; Recruitment ; Spawning ; Stock assessment ; Age determination ; Landing statistics ; Length-weight relationships ; Salinity ; Sexual maturity
    Repository-Name: AquaDocs
    Materialart: Report , Non-Refereed , Article
    Format: 188pp. &Tablas
    Standort Signatur Einschränkungen Verfügbarkeit
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