| Full text | |
| Author(s): |
MacCord, Fábio Sá
[1]
;
Amaral, A. Cecília Z.
Total Authors: 2
|
| Affiliation: | [1] Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia - Brasil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | Journal of the Marine Biological Association of the United Kingdom; v. 85, n. 4, p. 829-834, 2005. |
| Field of knowledge: | Biological Sciences - Zoology |
| Abstract | |
Seven hundred and six specimens of Scoletepis cf. chilensis and 551 specimens of Scolelep ' goodbod analysed. Individuals of each species were classified according to sex (male, female, and immature individuals). Width (w) and height (h) of setigers 3 and 5, the position of the first and the last gametogenic setigers, the total number of setigers, and the total length of each worm were measured. The area and volume of the setigers were estimated. Discriminant analysis was used to determine whether there were sexually dimorphic features, apart from the presence of gametes. Linear regression analysis was used to evaluate the relationship between each parameter and the number of setigers. Scolelepis cf. chilensis was found to be significantly larger than S. goodbodyi (t= 21.71 and t= 36.44, P < 0.05 for length and number of setigers, respectively). These species also differed in the position of the first gametogenic setiger, which averaged 27 (SD=3) in S. cf. chilensis and 22 (SD=I) in S. goodbodyl (t= 29.18, P < 0.05). There were no sexually dimorphic features in either sex of S. cf. chilensis (Wilks ' lambda=0.9675, P > 0.05, eigenvalue=0.034) or S. goodbodyi (Wilks ' lambda=0.8429, P > 0.05, eigenvalue=0.186). The total length showed the strongest correlation with the number of setigers in both species (r(2) =0.887 and 0.850 for S. cf. chilensis and S. goodbodyl, respectively), followed by the width and the volume of setigers. (AU) | |
| FAPESP's process: | 01/13353-1 - Reproductive study and influence of different degrees of eutrophication in the life history of Scolelepis squamata and Laeonereis acuta (Annelida: Polychaeta) |
| Grantee: | Fábio Sá Mac Cord |
| Support Opportunities: | Scholarships in Brazil - Doctorate |