The innervation of the setae on the appendages of the nauplius of<i>Eucalanus pileatus</i>Giesbrecht

Bundy, M. H.; Paffenhöfer, Gustav‐Adolf

doi:10.1080/10236249709379024

Cited by 5 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More proximally, the electron-dense microtubules form dense bands at the dendrite's periphery (Weatherby & Lenz 1993, their Fig. 3c) which eventually assume the configuration of a pinwheel (Bundy & Paffenhofer 1997, their Fig. 3d) as also shown for Temora stylifera (Fig.…”

Section: Discussionmentioning

confidence: 86%

“…Ultrastructure studies on late nauplii of E. pileatus revealed that at least 1 seta on its second antenna (A2) had the characteristics of a dually functional chemoand mechanosensory sensillum (Bundy & Paffenhofer 1997). Similarly, at lower food concentrations, copepodid stages and adult females of E. pileatus, perceived individual cells of the diatom Thalassiosira…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrastructure of setae of the maxilliped of the marine planktonic copepod Temora stylifera

Paffenhöfer¹,

Loyd²

1999

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Copepodid stages and adult females of many calano~d copepods create feeding currents to obtain food. So far it has been uncertain whether food particles were perceived chemically or hydrodynamically or by both modes sin~ultaneously. It was the goal of our study to determine the structures of potential sensors of setae on appendages of calanoids w h~c h are involved in the collection of food particles after these have been perceived at a distance from the gathenng appendage(s). We report here on the ultrastructure of setae of the maxilliped of adult females of Temora stylifera Dana. This appendage not only contributes sign~ficantly to produc~ng the feeding current, but also to gathering act~vely perceived food particles. Our results indicate that all setae of the female's maxilliped possess structures ~ndicative of mechano-and chemosensors. Since setae of this mostly movlng appendage are not still, dlstance perception of food particles is thought to occur by perceiving dissolved substances. Hydrodynamic sensors of the maxilliped are likely to be utllized when captured food particles have to be manipulated for ingestion or rejection

show abstract

Section: Discussionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Ultrastructure of setae of the maxilliped of the marine planktonic copepod Temora stylifera

Paffenhöfer¹,

Loyd²

1999

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Other changes in the nervous system during naupliar development include: appearance of the ganglion of antenna 1 and antenna 2; regression of the glomeruli of antenna 2 (these glomeruli are not reported in the first copepodid); thickening anteriorly of paired ventral nerves of Diarthrodes cystoecus (see Fahrenbach, 1962), which progressively unite posteriorly. A study of the innervation of setae of the appendages at NV of Eucalanus pileatus suggests that some setae are mechanoreceptors, while others may play a role in both mechanoreception and chemoreception (Bundy & Paffenhofer, 1997).…”

Section: Internal Anatomymentioning

confidence: 99%

Post-Embryonic Development of the Copepoda

Ferrari¹,

Dahms²

2007

View full text Add to dashboard Cite

show abstract

“…Friedman & Strickler (1975) described, from TEMs, structures of the mandibular palp of the freshwater copepod Diaptomus pallidus which were thought to represent chemosensors, but could not find features indicating mechanoreception. Second antennae and mandibles of nauplius Stage V of Eucalanus pileatus had structures indicative of both mechano-and chemoreception (Bundy & Paffenhöfer 1997). Two types of setae of the Mxp of 2 species of mesopelagic copepods had structures which were thought to represent chemosensors (Nishida & Ohtsuka 1997).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of cephalic appendage setae of marine planktonic copepods

Paffenhöfer

Loyd²

2000

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Our study aimed at determining which types of sensors are associated with setae on the cephalic appendages of marine calanoid copepods that create feeding currents. Such sensors enable copepods to rapidly identify potential food particles in the ambient water current, probably through chemical or hydrodynamic signals from the particles. We examined 4 copepod species, Centropages velificatus, Eucalanus pileatus, Paracalanus aculeatus and Temora stylifera, by scanning (SEM) and transmission (TEM) electron microscopy. Copepodids and adult females of all 4 species bear apical pores on the setae of their maxillipeds and second antennae, indicating potential chemoperceptive capabilities. TEM revealed putative chemo-and mechanosensors on the mandibular palp of C. velificatus and the second antennae of T. stylifera, supporting an earlier, similar report of sensors on the maxilliped of T. stylifera. As the setae of these 3 appendages are in almost continuous motion, at frequencies between 25 Hz (female E. pileatus) and 80 Hz (female P. aculeatus), food particles beyond the reach of the setae are believed to be recognised chemically by the apical pores of the individual setae. The observed mechanosensors are presumably used when handling larger food particles, as already described for T. stylifera during capture and alignment of elongated cells prior to ingestion.

show abstract

The innervation of the setae on the appendages of the nauplius ofEucalanus pileatusGiesbrecht

Cited by 5 publications

References 17 publications

Ultrastructure of setae of the maxilliped of the marine planktonic copepod Temora stylifera

Ultrastructure of setae of the maxilliped of the marine planktonic copepod Temora stylifera

Post-Embryonic Development of the Copepoda

Ultrastructure of cephalic appendage setae of marine planktonic copepods

Contact Info

Product

Resources

About