Keeping and behaviour of an acorn worm Saccoglossus mereschkowskii (Hemichordata, Enteropneusta) in laboratory conditions

Мұқаба

Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The design of the box is described, which allows to keep the acorn worm Saccoglossus mereschkowskii in laboratory conditions for 60 days and to observe its behavior and feeding. The locomotion and constructing of the burrows in the sediment are provided by peristaltic movements of the proboscis, which periodically changes its shape from cylindrical to mushroom-like, and vice versa. Worms build U-shaped burrows connected by flank anastomoses with the burrows of neighboring specimens. As a result, a branched system of passages is formed in a sediment layer up to 8 cm deep. The importance of such a system of enteropneust’s passages for aerating the upper layers of sediment is noted. When feeding, the proboscis sticks out from the anterior opening of the burrow and stretches along the surface of the sediment. Organic particles adhere to the mucus secreted by the epidermal epithelium of the proboscis, and are transported by ciliary beating to the furrow between the collar and proboscis, where the mouth is located.

Толық мәтін

Рұқсат жабық

Авторлар туралы

А. Lukinykh

Lomonosov Moscow State University

Email: olga_ejova@mail.ru
Ресей, Moscow

O. Ezhova

Lomonosov Moscow State University

Хат алмасуға жауапты Автор.
Email: olga_ejova@mail.ru
Ресей, Moscow

D. Klochikhina

Lomonosov Moscow State University

Email: olga_ejova@mail.ru
Ресей, Moscow

О. Katanova

Lomonosov Moscow State University

Email: olga_ejova@mail.ru
Ресей, Moscow

V. Malakhov

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Academician of the RAS

Ресей, Moscow

Әдебиет тізімі

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Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Diagram of a glass box for the maintenance and observation of live specimens of Saccoglossus mereschkowskii.

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3. Fig. 2. Three individuals of Saccoglossus mereschkowskii in a box between two glasses for lifetime observation. Scale: 2 cm.

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4. Fig. 3. Proboscis of Saccoglossus mereschkowskii, making a passage in the thickness of sandy soil. Scale: 1 mm.

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5. Fig. 4. Proboscis of Saccoglossus mereschkowskii extending along the soil surface for feeding. Scale: 1 mm.

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