Two sibling species ofTisbe(Copepoda, Harpacticoida):Tisbe reluctansandT. persimilisn. sp. Research on their morphology and population dynamics
✍ Scribed by B. Volkmann-Rocco; G. Fava
- Publisher
- Springer-Verlag
- Year
- 1969
- Tongue
- English
- Weight
- 548 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0025-3162
No coin nor oath required. For personal study only.
✦ Synopsis
A]~r
Two new forms ef the copepod genus Tisbe, one of which was found in the Lagoon Of Venice near Chioggia (Italy), and the other in the port of Malta, have been studied. AJthough showing a strfl~ing resemblance in morphology, all attempts to cro~ representatives of the 2 populations have failed. They may, therefore, be considered as "sibling species". Even on closer study, no qualitative ~truetural differences between them were found. However, careful analysis of some biometrical traits revealed significant differences. A certain differentiation of another kind emerges from the comparison of the life-cycle and population dynamics. Under standard ]aboratory conditions the fol]ow~g main parameters have been considered: (t) survival; (2) mean and minimum generation time, T; (3) not reproduction rate, R0; (4) intrinsic rate of natural increase, rm. The significance of the findings is discussed.