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Title: Caudal region regeneration in a natural population of the morid fish Physiculus cyanostrophus in the tropical eastern Atlantic ocean
Authors: Triay-Portella, Raul 
González Pérez, José Antonio 
Pajuelo, Jose G. 
UNESCO Clasification: 240119 Zoología marina
Keywords: Age-Determination
Swimming Performance
Otolith Weight
Prey Fishes
Growth, et al
Issue Date: 2019
Project: 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 
Journal: Deep-Sea Research Part I: Oceanographic Research Papers 
Abstract: The present study describes a remarkable caudal regeneration capacity of Physiculus cyanostrophus, a benthopelagic fish from the twilight zone. This trait reveals the ability of this particular morid to survive attacks that would be lethal in other species. In teleosts, the most widespread sublethal predation is confined to scale-eating and fin-nipping by specialized predators. In P. cyanosytrophus the larger sized individuals the greatest amount of tissue loss occurred in the caudal region (maximum 28 vertebrae, corresponding to 45% lost body length). The amount of regenerated tissue was independent of body losses and ranged between 5 and 19% of total length for the entire range of sizes. The frequency of regenerated individuals in the population increases with ontogeny (16.8-67.5%). Tissue losses represent a significant allocation of costs in terms of growth and offspring production. Nevertheless, regeneration capability decreases mortality in the large breeding females of a population, maximizing maternal fitness.
ISSN: 0967-0637
DOI: 10.1016/j.dsr.2019.06.008
Source: Deep-Sea Research Part I-Oceanographic Research Papers [ISSN 0967-0637], v. 150, 103062
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