Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Endogenous swimming rhythms of juvenile blue crabs, Callinectes sapidus, as related to horizontal transport
Forward Jr., R.B.; Reyns, N.B.; Diaz, H.; Cohen, J.H.; Eggleston, D.B. (2004). Endogenous swimming rhythms of juvenile blue crabs, Callinectes sapidus, as related to horizontal transport. J. Exp. Mar. Biol. Ecol. 299(1): 63-76. http://dx.doi.org/10.1016/j.jembe.2003.09.002
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697
|   |
| Trefwoorden |
Biological phenomena > Biological rhythms > Circadian rhythms
Developmental stages > Juveniles
Dispersion
Distribution > Geographical distribution > Horizontal distribution
Callinectes sapidus Rathbun, 1896 [WoRMS]
Marien/Kust |
| Author keywords |
blue crab; Callinectes sapidus; juvenile; circadian rhythm; horizontaltransport; secondary dispersal |
| Auteurs | | Top |
- Forward Jr., R.B.
- Reyns, N.B.
- Diaz, H.
|
- Cohen, J.H.
- Eggleston, D.B.
|
|
| Abstract |
The blue crab Callinectes sapidus settles and metamorphoses in areas of aquatic vegetation in estuaries. Crabs in the first-fifth instar stages (J1-5) then emigrate from these areas by walking on the bottom or pelagic dispersal throughout estuaries. The present study was designed to characterize the timing of this migration pattern relative to the light-dark and tidal cycles. Field sampling in Pamlico Sound, NC, USA indicated that J4-5 juveniles were most abundant in the water column during the night. J4-5 juveniles were collected from Pamlico Sound in an area near Oregon Inlet that has semi-diurnal tides, a Mid-Sound area where tides are weak, and on the West side where regular tides do not occur. Crabs from all three sites had a circadian rhythm in which they swam up in the water column during the time of darkness in the field. Peak swimming consistently occurred at about 0300 h, but was not related to the timing of the tidal cycle. Similar results were obtained for juvenile crabs from an adjacent estuary having semi-diurnal tides. Dispersal at night reduces predation by visual predators, and allows early juvenile blue crabs to disperse planktonically from initial settlement sites. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
