P.A.S. OLIVIER, S.M. DIPPENAAR, L.F. KHALIL & N.M . MOKGALONG. 2000. Observations on a lesser-known monogenean, Udonella myliobati, from a copepod parasite, Lepeophtheirus natalensis, parasitizing the spotted ragged-tooth shark, Carcharias taurus, from South African waters. Onderstepoort Journal of Veterinary Research, 67: 135-140 The phylogeny of the genus Udonella has been disputed for quite ...

Pelagic copepods jump to relocate, to attack prey and to escape predators. However, there is a price to be paid for these jumps in terms of their energy costs and the hydrodynamic signals they generate to rheotactic predators. Using observed kinematics of various types of jumps, we computed the imposed flow fields and associated energetics of jumps by means of computational fluid dynamics simul...

Horizontal distribution of the copepod Neocalanus cristatus was shown to be fractal on the scale between tens of meters and over 100 km. The fractal dimensions ranged between 1.68–1.89, significantly higher than those of oceanic turbulence and phytoplankton distribution. 1. Introduction Heterogeneity in the horizontal distribution of zooplankton has been recognized for many years (e.g. Hardy, 1...

SINCE 1942 Teredicola typica has been known to be associated with shipworms in the Hawaiian Islands, but neither the genus nor species has been reported in literature from any other locality, or from any other host group. Dr. C. H. Edmondson of the Bernice P. Bishop Museum, who made the original collections of this interesting copepod, has stated in personal correspondence that he has inquired ...

Copepods have often improved larviculture of marine fish species that are not easily reared using rotifers. One such species is Glaucosoma hebraicum. G. hebraicum larvae were reared on a combined diet consisting of equal numbers of cultured copepod nauplii and rotifers and a diet of rotifers only. Growth was significantly greater in larvae fed with the combined diet. Survival was 37% in the cop...

Polyunsaturated aldehydes (PUAs) are released by several diatom species during predation. Besides other attributed activities, these oxylipins can interfere with the reproduction of copepods, important predators of diatoms. While intensive research has been carried out to document the effects of PUAs on copepod reproduction, little is known about the underlying mechanistic aspects of PUA action...

Copepods are to an increasing extent cultivated as feed for mariculture fish larvae with variable production success. In the temperate climate zone, this production faces seasonal limitation due to changing abiotic factors, in particular temperature and light. Furthermore, the production of copepods may be influenced by biotic factors of the culture systems, such as competing microorganisms, ha...

We investigated the impact of copepods on the seston community in a mesocosm set-up, and assessed how the changes in food quantity, quality and size affected the condition of the grazers, by measuring the RNA:DNA ratios in different developmental stages of Calanus finmarchicus. Manipulated copepod densities did not affect the particulate carbon concentration in the mesocosms. On the other hand,...

We reared the ha rpac t~co~d copepod Nitocra splnipes on d ~ e t s of bacteria, a d ~ a t o m , or a macroalga, evaluating survivorsh~p and growth in short-term (51 generation) experiments Llpid content of the copepods and t h e ~ r d ~ e t s was measured and used as an Index of nutrition Although growth, survivorship and l i p ~ d content of N sp~njpes were signif~cantly greater when fed the d...