Adaptive strategy of the Porcellanasterid sea stars


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Morphological–functional analysis suggests that the adaptations of sea stars of the family Porcellanasteridae to burrowing and deposit feeding are related to morphological simplification. This simplification led to reduction of the morphological structures responsible for respiration (papulae and paxillae), decrease in the number of cribriform organs, reduction of body size, and retention of juvenile characters by adults. The forced-circulation water system inside the burrow also changes. The water generated by the cribriform organs becomes upwardly directed. The adaptive strategy in the family is characterized by intensification of nonselective deposit feeding by means of active moving within the muddy sediment and removal of fecal materials from the burrow.

作者简介

A. Mironov

Shirshov Institute of Oceanology

Email: akrayushk@mail.ru
俄罗斯联邦, pr. Nakhimovskii 36, Moscow, 117997

A. Dilman

Shirshov Institute of Oceanology

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Email: akrayushk@mail.ru
俄罗斯联邦, pr. Nakhimovskii 36, Moscow, 117997

I. Vladychenskaya

Belozerskii Institute of Physicochemical Biology

Email: akrayushk@mail.ru
俄罗斯联邦, Leninskie gory 1, bld. 40, Moscow, 119992

N. Petrov

Belozerskii Institute of Physicochemical Biology

Email: akrayushk@mail.ru
俄罗斯联邦, Leninskie gory 1, bld. 40, Moscow, 119992

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