SENSITIVITY TO LIGHT IN THE SEA ANEMONE METRIDIUM SENILE (L.)
نویسندگان
چکیده
منابع مشابه
Sensitivity to Light in the Sea Anemone Metridium Senile (l.)
1. The reaction time of the photosensitive response of Metridium was found to be composed almost entirely of a sensitization period. If a latent period exists, it is too short to be detected by the methods used and is probably less than a second in duration. The length of the reaction time, therefore, was used as a measure of the radiant energy necessary at any intensity to elicit a response. 2...
متن کاملPhases of activity in the sea-anemone, Metridium senile (L.), and their relation to external stimuli.
We have shown in a previous paper (Batham & Pantin, 19506) that the sea-anemone Metridium senile exhibits continual very slow muscular activity. It is most evident in the changes of shape of the column caused by the reciprocal contractions of the circular muscle sheet, and of the longitudinal parietal musculature which runs at the junction of each mesentery with the body wall. This inherent act...
متن کاملSlow Contraction and Its Relation to Spontaneous Activity in the Sea-anemone Metridium Senile (l.)
It has been known for some time that the most rapid reflex contractions of seaanemones show a characteristic relation to the stimulus. Thus in CalUactisparasitica a short series of adequate electric shocks, given at a frequency of about 1 per sec, is regularly followed by a facilitated contraction of the marginal sphincter (Pantin, 1935a, b). That is, each successive shock sets up a nervous imp...
متن کاملRole of the sea anemone Metridium senile in structuring a developing subtidal fouling community
In a variety of ecological settings, individual species have been shown to possess the ability to influence the structure and development of the community at large. However, within fouling communities, the influences of many sessile invertebrate species and how they drive patterns of succession remain relatively unexplored. The sea anemone Metridium senile is ubiquitous in cold temperate foulin...
متن کاملPrey Capture by the Sea Anemone Metridium senile (L.): Effects of Body Size, Flow Regime, and Upstream Neighbors.
The sea anemone Metridium senile is a quantitatively important passive suspension feeder in hard-bottom communities on the west coast of Sweden and occurs in aggregations with different size distributions. This study tests the hypothesis that different polyp sizes have different optimal flow regimes maximizing prey capture. Results showed that prey capture by M. senile is a function of both flo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1957
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.40.5.715