INTERTIDAL ZONATION IN POPULATIONS OF MYA ARENARIA 1
نویسندگان
چکیده
منابع مشابه
Sensory Equilibrium and Dark Adaptation in Mya Arenaria
1. The reaction time of Mya to light is composed of two parts. The first, a sensitization period, is an exceedingly short interval of the order of magnitude associated with photographic processes. The second is a latent period of about 1.3 seconds, during which Mya need not remain exposed to the stimulating light. 2. The process of dark adaptation in Mya is orderly. Its progress may be represen...
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IT is a matter of common observation that lamellibranch molluscs may close the valves of their shell by a fairly rapid twitch-like contraction of the adductor muscles, and may thereafter in certain circumstances relax the adductors, immediately allowing the valves to gape, while in other circumstances these muscles may be maintained for a considerable time in the shortened state even when large...
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Methods Lethal temperatures for M. californianus were determined using temperature-controlled chambers in which both the magnitude and duration of exposure were manipulated. Field surveys of the shore level and solar exposure of upper zonation limits of mussel beds were conducted at 15 sites. Measurements from the lethal temperature studies and field surveys were used with a biophysical model o...
متن کاملThe Nature of the Latent Period in the Photic Response of Mya Arenaria
The latent period in the response of Mya to illumination varies inversely as the duration of the exposure to which it is subjected. The reciprocal of the latent period, measuring the velocity of the process which underlies it, is a linear function of the exposure period. Since the duration of the exposure represents the amount of photochemical activity, it is concluded that the substances forme...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1960
ISSN: 0024-3590
DOI: 10.4319/lo.1960.5.4.0381