Análisis de los efectos maternales en la productividad de Sebastes fasciatus Storer, 1856 y su efecto en el reclutamiento en Flemish Cap (NE América)

• Main Author: González Carrión, Francisco
• Other Authors: Saborido-Rey, Fran
• Format: Master Thesis
• Language: Spanish
• Published: Universidad de Alicante 2017
• Subjects: Sebastes fasciatus; Flemish Cap; Potential fecundity; Recruitment; Fecundidad potencial; Reclutamiento; Tuvo; Isla de Terranova; Terranova
• Online Access: http://hdl.handle.net/10261/309724

98 pages [EN] Fecundity of Sebastes fasciatus was analyzed in relation to several maternal features during 2000, 2007, 2015 and 2016. The mean potential fecundity was estimated to be 36000 oocytes and relative fecundity average 73 oocytes. Fecundity varied significantly with female length and gutted weight, while condition had little influence on fecundity variation. The model complete showed that a higher female condition index the potential fertility increased, so the condition factor significantly affected fertility. Mean oocyte diameter was estimated to be 0.56 mm. Oocyte diameter varied significantly with female length and gutted weight, while condition had little influence on fecundity variation, although with an interpretable value. Population dynamics were analyzed through treatment of reproductive potential indexes (TEP) and other abundance or biomass indexes were compared with recruitment to see stock – recruitment relationship (Ricker model). The reproductive potential indexes that improved the relationship stock – recruitment (SSB beaked redfish – recruitment) were mature females biomass (FSSB), abundance of mature females, abundance of mature females greater than 25 cm and the abundance mature females greater than 30 cm. [ES] Flemish Cap es un caladero que se encuentra en el Noreste de Norte America, a 300 millas de la Isla de Terranova. La fecundidad de Sebastes fasciatus en Flemish Cap se analizó en relación con diferentes características maternales durante los años 2000, 2007, 2015 y 2016. La fecundidad potencial promedio se estimó en 36000 ovocitos con una fecundidad relativa de 73 ovocitos g-1 . La fecundidad varió significativamente con la talla y con el peso eviscerado de la hembra, mientras que con el factor de condición tuvo poca influencia. El modelo completo reflejó que a mayor índice de condición de la hembra la fecundidad potencial se incrementó, por lo que el factor de condición afectó significativamente a la fecundidad. El diámetro del ovocito promedio se estimó en 0.56 mm. El ...