Intraspecific density effect on growth of Marphysa 'sp.' Juveniles
| Autor: | João Pedro Garcês, Pedro Pousão-Ferreira |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Scientia Marina, Vol 85, Iss 2 (2021) |
| Druh dokumentu: | article |
| ISSN: | 0214-8358 1886-8134 |
| DOI: | 10.3989/scimar.05078.012 |
| Popis: | There is growing demand for the territorial tube-building genus Marphysa (Eunicidae: Polychaete), commonly known in Portugal as “goose”, for use as fishing bait, and it is being harvested all around the world for that purpose. Effects of intraspecific density on juvenile growth were studied over a four-month period in laboratory facilities. Three polychaete densities (low, 50 worms; medium, 150 worms; and high, 250 worms) were used in a 0.25 m2 aquarium containing sandy sediment and recirculating water. Total length, dry weight and number of segments were recorded for 60% of the initial population. All polychaetes were also counted to determine mortality rate and territorial behaviour through the existence of body lesions and broken and regenerating posterior segments. The results obtained in this study showed that density had a significant effect (p |
| Databáze: | Directory of Open Access Journals |
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