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Furthermore, all of the variables are measured with error; and measurement error for the X and Y variables is similar ([+ or -] 3% for wet weights and [+ or -]1%-4% for cnida dimensions).
Cnida scaling is described here for the first time.
First and most importantly, cnida scaling is real: larger Anthopleura and Tealia do produce larger spirocysts.
Variation in cnida shape with increasing cnida size
Multiple lines of evidence indicate that cnida shape changes with cnida size.
Taxonomic implications of intraspecific variation in cnida size and shape
Attempts to ascertain cnida function based on numbers of discharged spirocysts and nematocysts retained on targets (e.
We distinguish at least three types of interaction between targets and cnida based on efferent mechanisms: (i) cnida penetration; (ii) cnida adhesion; and (iii) tentacle adherence.
The contribution of each kind of cnida to adhesive force is determined by opposing forces operating on the discharged cnida; one from the tentacle and another from the target.
Factors affecting cnida adhesion are related to the nature of the everted tubule and to the physical and chemical characteristics of the target.
In the present experiments, test probes have been constructed either to maximize or to minimize cnida adhesion.
Passive factors potentially include considerations of the size and shape of the cnida capsules, of the lateral pressure exerted by the adjacent epithelium, as well as any possible cytoskeletal elements, such as the participation of anchoring fibrillar baskets and hemidesmosomal junctions, as occur in hydrozoan nematocytes (Cormier and Hessinger, 1980; Wood and Novak, 1982).