Long-term morphometric variations in a population of the deep-sea shrimp aristeus antennatus (Risso, 1816) (Decapoda, Aristeidae)
The objective of this study was to analyze possible morphometric variations in the relationship among various measurements of the body parts of Aristeus antennatus, in the course of a long period of time (30 years). The same appendages were measured in the same way and with the same precision in 196...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 1998 |
| País: | España |
| Repositorio: | accedaCRIS portal de investigación de la Universidad de las Palmas de Gran Canaria |
| OAI Identifier: | oai:accedacris.ulpgc.es:10553/1413 |
| Acesso em linha: | http://hdl.handle.net/10553/1413 |
| Access Level: | acceso abierto |
| Palavra-chave: | 2401 Biología animal (zoología) Gamba rosada Crustáceos Crecimiento |
| Resumo: | The objective of this study was to analyze possible morphometric variations in the relationship among various measurements of the body parts of Aristeus antennatus, in the course of a long period of time (30 years). The same appendages were measured in the same way and with the same precision in 1965 and 1995. To avoid differences caused by sexual dimorphism only females were analyzed. The relative growth of the tail appendages of Aristeus antennatus (telson and externa! uropod) increased. The scaphocerite and the abdomen length remained practically without change. The length of the articles of the third and fourth pereiopods did not differ, but the total length of the pereiopods was significantly reduced. The existence of possible morphometric changes in the swimming structures in relation to environmental changes is discussed, especially in relation to the decrease of food resource, and to benthic disturbance, caused by increasing fishing pressure. |
|---|