4. ANALYSIS OF FACTORS INVOLVED IN SYMBIOSIS
45
within 10 min, the trial was recorded as a (‘ no run ”. Because of the
nature of this apparatus, it would be of interest to know whether
response could be elicited if the crabs were placed in closer contact with
the hosts.
In the case of a related species of Pinnotheres, P. rnaculatus, Sastry
and Menzel(1962), by employing the circular choice apparatus of Bartel
U
FIG. 8. Test apparatus dcsigned by Bartel and Davenport. Plan (below) and in section
(above). (After Bartel and Davenport, 1956.)
and Davenport (1956) (Fig. 8), have demonstrated that the commensal
crab is (‘ capable of recognizing its hosts, Aequipecten irradians and
Atrina rigida ”, i.e. they are attracted to them. It is of importance to
note that Sastry and Menzel state that :
The attraction of commensals to the host scallops decreased when the hosts
were not directly introduced into the radial chamber of the choice apparatus.
This suggests that perhaps a spatial proximity of hosts to commensals is
45
within 10 min, the trial was recorded as a (‘ no run ”. Because of the
nature of this apparatus, it would be of interest to know whether
response could be elicited if the crabs were placed in closer contact with
the hosts.
In the case of a related species of Pinnotheres, P. rnaculatus, Sastry
and Menzel(1962), by employing the circular choice apparatus of Bartel
U
FIG. 8. Test apparatus dcsigned by Bartel and Davenport. Plan (below) and in section
(above). (After Bartel and Davenport, 1956.)
and Davenport (1956) (Fig. 8), have demonstrated that the commensal
crab is (‘ capable of recognizing its hosts, Aequipecten irradians and
Atrina rigida ”, i.e. they are attracted to them. It is of importance to
note that Sastry and Menzel state that :
The attraction of commensals to the host scallops decreased when the hosts
were not directly introduced into the radial chamber of the choice apparatus.
This suggests that perhaps a spatial proximity of hosts to commensals is