Biometric and statistical investigations on the cnidoma of the genus Hydra (Cnidaria, Hydrozoa)

Autor: Maria I. Deserti, Mauricio O. Zamponi
Jazyk: English<br />Spanish; Castilian<br />Portuguese
Rok vydání: 2012
Předmět:
Zdroj: Iheringia: Série Zoologia, Vol 102, Iss 3, Pp 298-302 (2012)
Druh dokumentu: article
ISSN: 1678-4766
0073-4721
DOI: 10.1590/S0073-47212012000300008
Popis: This paper deals about the nematocysts like a source of biometric information for comparison between the species Hydra vulgaris Pallas, 1766, Hydra vulgaris pedunculata Deserti et al., 2011 and Hydra pseudoligactis (Hyman, 1931). This biometric tool lets us carry out statistical comparisons and adding these results to the identification of specimens from different classificatory groups. In this particular study, we obtained significant differences between species, individuals of each species and nematocysts type when compared the biometry of its nematocysts. Another result was the variation in of particular nematocysts, like atrichous isorhiza and holotrichous isorhiza for the species H. vulgaris in relation to the column size.
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