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http://hdl.handle.net/10553/130417
Título: | Reproductive traits of the deep-sea shrimp Plesionika williamsi (Decapoda: Pandalidae) from the eastern-central Atlantic | Autores/as: | Bautista, A. González Pajuelo, José Mario González Pérez,José Antonio Lorenzo Nespereira, José María Triay Portella, Raül |
Clasificación UNESCO: | 251005 Zoología marina 310411 Reproducción |
Palabras clave: | Sex-ratio Brood size Maturity Depth-size distribution Pandalidae |
Fecha de publicación: | 2024 | Proyectos: | Valorización de productos marinos de la Macaronesia: Turismo, gastronomía y capacitación profesional Desarrollo de bases técnico-científicas, capacitación y transferencia de tecnología y conocimiento para la exploración, procesamiento y comercialización de productos del mar en la Macaronesia |
Publicación seriada: | Deep-Sea Research Part I: Oceanographic Research Papers | Resumen: | The reproductive aspects of all Plesionika species are relatively well known worldwide, except for the deepest species of the genus, Plesionika williamsi, for which little information is available throughout its range. The ovarian maturity, sex ratio, brood size, and size-depth distribution of the deep-sea shrimp Plesionika williamsi (Pandalidae) in the Canary Islands (eastern-central Atlantic) were analysed. Ovigerous females were observed all year round, with the highest number of ovigerous females recorded between July and October. The presence of a greater number of ovigerous females during the summer may reflect a high local availability of food or the optimal abiotic conditions, which are factors with a strong influence on reproduction. The presence of non- ovigerous mature females throughout the year indicates that their resting period in the reproductive cycle occurs asynchronously. The physiological size at first sexual maturity was 19.24 mm in carapace length (CL) and the length at first sexual maturity was estimated at 23.15 mm CL. Estimates of size at first sexual maturity based on ovigerous females describe the result of the reproduction process, whereas size at first sexual maturity based on ovarian maturity deals with physiological preparation for reproduction. The modal size class of egg production was 24–30 mm CL, which yielded 83.22% of the population egg production. Plesionika williamsi is an iteroparous species that can produce small eggs during egg extrusion. The mean number of external embryos carried by females was 3048 and can be considered a true approximation of the number of larvae released in each batch, which depend on the conditions existing in each system. The shallower individuals are associated with a depth stratum that represents the boundary between two water masses present in the Canary Islands. The increase in size with depth is related to the presence of submarine volcanic canyons, which constitutes a flow channel of surface organic matter to depth. | URI: | http://hdl.handle.net/10553/130417 | ISSN: | 0967-0637 | DOI: | 10.1016/j.dsr.2024.104320 | Fuente: | Deep-Sea Research Part I: Oceanographic Research Papers [ISSN 0967-0637], v. 208 |
Colección: | Artículos |
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