Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/58421
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
Validation
Teleostei
Pisces
Dimorphism
Gadiformes
Twilight zone
Regeneration
Tissue loss
Maternal fitness
Physiculus cyanostrophus
Issue Date: 2019
Project: Desenvolvimento de condições técnicas e bases científicas para a exploração sustentável de mariscos e peixes (recursos pesqueiros) nas águas, quer costeiras quer profundas, da Madeira, Canárias e Cabo Verde e sua comercialização. 
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.
URI: http://hdl.handle.net/10553/58421
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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