Predation by the isopod Saduria entomon on the amphipods Monoporeia affinis and Pontoporeia femorata: experiments on prey vulnerability

Oecologia ◽  
1992 ◽  
Vol 91 (2) ◽  
pp. 153-156 ◽  
Author(s):  
Cathy Hill ◽  
Ragnar Elmgren
Keyword(s):  
Prey Vulnerability ◽  
Saduria Entomon

Total Haemocyte Counts and Haematopoiesis in Saduria Entomon (Linnaeus, 1758) (Isopoda, Valvifera) From the Baltic Sea Infected With the Yeast Cryptococcus La Urentii (Kufferath) Skinner*)

Crustaceana ◽  
1996 ◽  
Vol 69 (4) ◽  
pp. 485-493 ◽  
Author(s):  
A. Babula ◽  
Z. Hryniewiecka-Szyfter
Keyword(s):  
Baltic Sea ◽  
Yeast Cells ◽  
Cryptococcus Laurentii ◽  
The Baltic Sea ◽  
The Baltic ◽  
Total Haemocyte Count ◽  
Saduria Entomon

AbstractStudies were made of the haemolymph and haematopoiesis of 22 specimens of Saduria entomon, naturally infected with the yeast Cryptococcus laurentii. In 18 of these haemocytes were also counted. Their total haemocyte count was 693, which is 3 times the figure in healthy S. entomon. Their haemolymph contained granulocytes, hyaline cells, and C. laurentii cells. Granulocytes contained phagocytosed C. laurentii cells, while hyaline cells did not contain phagocytosed yeast. Haematopoiesis was clearly taking place in the gut wall of the S. entomon specimens under study. In the 4 remaining individuals the haemolymph was filled with C. laurentii cells among which only single hyaline cells with phagocytosed yeast cells were observed. In their gut wall only yeast cells accumulated. The results obtained support our earlier findings that in S. entomon granulocytes are the primary phagocytotic haemocytes, and that hyaline cells can be taken to be prohaemocytes capable of proliferation under specific conditions.

Prey vulnerability and predation pressure shape predator-induced changes in O2 consumption and antipredator behaviour

2020 ◽  
Vol 167 ◽  
pp. 13-22
Author(s):  
Simon Karythis ◽  
Tomas O. Cornwell ◽  
Luis Giménez Noya ◽  
Ian D. McCarthy ◽  
Nia M. Whiteley ◽  
...  
Keyword(s):  
Predation Pressure ◽  
Antipredator Behaviour ◽  
O2 Consumption ◽  
Prey Vulnerability ◽  
Induced Changes
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