Growth, survival, digestive activity and respiratory metabolism of Octopus maya juveniles fed with prepared diets

Author:

Santiago Israel1,Rosas Carlos2,Cruz‐López Honorio2,Domingues Pedro3,Pascual Cristina2,Mascaro Maite2,Sanchez‐Arteaga Ariadna2,Caamal Claudia2,Gallardo Pedro2ORCID

Affiliation:

1. Centro Universitario de la Costa Sur, División de Desarrollo Regional Universidad de Guadalajara Jalisco Mexico

2. Unidad Multidisciplinaria de Docencia e Investigacion, Facultad de Ciencias Universidad Nacional Autonoma de Mexico Hunucma Mexico

3. Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Vigo Vigo Spain

Abstract

AbstractThe effects of two prepared feeds were tested on growth, survival, enzymatic activity, nutritive reserves in the digestive gland and oxygen consumption of Octopus maya juveniles. For the first time, a semihumid paste (HD, control) and a dry diet, in pelleted form (PD, experimental) with the same formulation were used for this species. The experiment lasted for 42 days. Results indicate that growth rates were similar for both diets (p > 0.05); however, survival (70%) was higher with the PD compared to the HD (48%) (p < 0.05). The performance index was higher for octopuses fed the PD (p < 0.05). No differences in acid proteases activity were observed. However, a higher activity of alkaline proteases in the octopuses fed the PD was observed (p < 0.05). Ingestion rate was higher for octopuses fed the PD. Routine energy inversion was similar in both treatments (p > 0.05). A greater energy inversion was observed in octopuses fed the PD, whose active metabolism was double compared to the octopuses fed the HD. Results showed that the PD promoted similar growth compared to the HD diet but favored survival, and a greater investment in the active metabolism, reflected in the apparent heat increase.

Publisher

Wiley

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