Morphological, physiological and behavioral changes during post-hatching development of Octopus maya (Mollusca: Cephalopoda) with special focus on the digestive system

Aquatic Biology

Cristina Pascual¹  Maite Mascaró¹  Cintia Moguel¹  Claudia Caamal-Monsreal¹  Omar Hernando Avila-Poveda¹  Ariadna Sanchez¹  Carlos Rosas¹ 

关键词: Cephalopoda;    Digestive gland;    Post-hatching development;    Digestive enzyme;    Feeding behavior;    Octopus maya;   

DOI  :  10.3354/ab00234

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: We examined changes in the histology, physiology and enzymatic activity of the digestive gland—as well as changes in morphology and feeding behavior—of Octopus maya during rearing, to define the phases characterizing post-hatching development. Morphometric changes showed that juvenile O. maya exhibited a non-growth phase during the first 10 d post-hatching (DPH). Histological analysis revealed that the digestive gland morphology changed with age, from a simple tubular gland in octopuses 2 DPH to a tubulo-acinar and vacuolar structure with digestive cells characterized by vacuoles in octopuses 45 DPH. Digestive enzyme activity was erratic until 14 DPH, after which the activity started to stabilize. O. maya at 2 and 3 DPH rarely presented attack responses to either visual or both visual and chemical stimuli from prey. In contrast, at 4 DPH, octopuses responded to visual stimuli from crabs and palaemonids, but did not display preference in attacking either prey type. Based on our results, we have defined for the first time 2 phases in the early life history of O. maya: post-hatching and juvenile.

【 授权许可】

Unknown