Integration of multiple predator cues by the crayfish Orconectes propinquus

2001 ◽  
Vol 61 (4) ◽  
pp. 771-776 ◽  
Author(s):  
Peter Bouwma ◽  
Brian A. Hazlett
Keyword(s):  
Predator Cues ◽  
Orconectes Propinquus

An ecological study of the branchiobdellid commensals (Annelida-Branchiobdellidae) of some mid-western Ontario crayfish

1968 ◽  
Vol 46 (5) ◽  
pp. 835-843 ◽  
Author(s):  
John E. Bishop
Keyword(s):  
Host Specificity ◽  
Dominant Species ◽  
Ecological Study ◽  
Rabbit Serum ◽  
First Year ◽  
Serological Testing ◽  
Severe Winter ◽  
Orconectes Propinquus ◽  
Winter Conditions ◽  
Laurel Creek

Orconectes propinquus and Cambarus robustus from the Speed River, Sunfish Lake, and Laurel Creek, harbor two branchiobdellids, Cambarincola chirocephala and Pterodrilus distichus. Both adult and cocoon populations of the dominant species (C. chirocephala) are proportional to the size of the host throughout the year, except that first-year crayfish are free of cocoons. The reduction in total number of commensals from autumn to spring can be attributed to severe winter conditions. A subrostral site of preference for adult branchiobdellid attachment, and a dominant abdomen I and II site for cocoon deposition are indicated for O. propinquus. On C. robustus, adults are most commonly found on the antennal bases and among the maxillipeds, and cocoons on the last live abdominal sternites. No host specificity is evident although an unidentified Cambarus sp. from Sunfish Lake is free of commensals. Host incompatibility may explain this, but data from Laurel Creek indicate that silting of the microhabitat is responsible for loss of branchiobdellid population. The crayfish–branchiobdellid relationship is commensal, or at most facultatively parasitic, as adult worms can live without a host for extended periods. Serological testing of rabbit serum containing branchiobdellid antibodies against crayfish serum is negative. The dependence of the egg stage on the host for some undetermined factor or factors is discussed. An Asellus sp. fails to pick up the commensals even when exposed under ideal conditions for colonization.

Responses of larval dragonflies to conspecific and heterospecific predator cues

2007 ◽  
Vol 32 (3) ◽  
pp. 283-288 ◽  
Author(s):  
GAVIN FERRIS ◽  
VOLKER H. W. RUDOLF
Keyword(s):  
Predator Cues

scholarly journals Effects of parasitism on antipredatory responses and defensive behaviors in the subterranean rodent Ctenomys talarum.

2021 ◽  
Author(s):  
Valentina Brachetta ◽  
Cristian Schleich ◽  
Roxana R. Zenuto
Keyword(s):  
Mate Selection ◽  
Experimental Conditions ◽  
Subterranean Rodent ◽  
Predator Cues ◽  
Biological Communities ◽  
Behavioral Adaptations ◽  
Defensive Behaviors ◽  
Ctenomys Talarum ◽  
Evolutionary Force ◽  
Elevated Maze

Predation represents an important evolutionary force shaping specific adaptations. Prey organisms present behavioral adaptations that allow them to recognize, avoid and defend themselves from their predators. In addition to predation, there is a growing consensus about the role of parasitism in the structuring of biological communities. In vertebrates, the effects on hosts include changes in daily activity, feeding, mate selection, reproduction, and modifications in responses to environmental stimuli. These behavioral variations can benefit the parasite (parasitic manipulation), benefit the host, or appear as a side effect of the infection. We evaluated the influence of parasitism on the behavioral and physiological response of Ctenomys talarum (Thomas 1898) to predator cues. We found that individuals exposed to cat odors and immobilization entered less often and stayed less time in the transparent arms of elevated maze, exhibiting a preference for protected areas (anxiogenic response). Additionally, we evaluated if the presence of parasites affected antipredatory behaviors in tuco-tucos (naturally parasitized, deparasitized or inoculated with Eimeria sp.). We did not find differences among the groups as regards responses to predator cues. Therefore, while exposure to predator cues triggered a stress response, the manipulation of parasite loads did not modify homeostasis under these experimental conditions.

scholarly journals Periwinkle climbing response to water- and airbone predator chemical cues may depend on home-marsh geography

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5744 ◽  
Author(s):  
John M. Carroll ◽  
Morgan B. Church ◽  
Christopher M. Finelli
Keyword(s):  
North Carolina ◽  
Salt Marsh ◽  
Chemical Cues ◽  
Geographical Location ◽  
Behavioral Responses ◽  
Chemical Cue ◽  
Predator Cues ◽  
Littorina Irrorata ◽  
Spatial Refuge ◽  
Response To Water

The salt marsh periwinkle, Littorina irrorata, exhibits a spatial refuge from predation by climbing the stems of Spartina alterniflora in order to avoid benthic predators. Salt marsh periwinkles have a broad geographic distribution, and for many species, responses to predators also varies with biogeography. This study sought to determine if the geographical location of the home marsh influenced the response of periwinkles (climbing height) to blue crab predator cues both via air and water. Snails from Louisiana (LA) climbed higher in general than those from North Carolina (NC), regardless of chemical cue. However, LA snails climbed 11 cm higher in the presence of waterborne predators than control snails with no cue, while NC snails only climbed five cm higher in the same comparisons. Airborne chemical cue tended to have snails climbing at intermediate heights. These responses were significantly enhanced when both populations of snails were housed together. Periwinkle response to predator cues was stronger in LA than NC, and so it is possible that the behavioral response of these snails to predators varies with biogeography of the home marsh. Also interestingly, the results of this study also suggest that cue delivery is probably occurring via mechanisms other than water, and potentially via airborne cues. Therefore, salt marsh periwinkles likely respond to numerous cues that initiate behavioral responses, including airborne cues, and these responses may vary by home-marsh geography.

Predator cues increase negative effects of a simulated marine heatwave on tropical zooplankton

2020 ◽  
Vol 530-531 ◽  
pp. 151415 ◽  
Author(s):  
Kiem N. Truong ◽  
Ngoc-Anh Vu ◽  
Nam X. Doan ◽  
Minh-Hoang Le ◽  
Minh T.T. Vu ◽  
...  
Keyword(s):  
Tropical Zooplankton ◽  
Negative Effects ◽  
Predator Cues

scholarly journals Reduced telomere length in embryos exposed to predator cues

2019 ◽  
Vol 222 (24) ◽  
pp. jeb216176 ◽  
Author(s):  
Jose C. Noguera ◽  
Alberto Velando
Keyword(s):  
Telomere Length ◽  
Predator Cues
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