Role of chemical substances from fish hosts in hatching and host-finding in monogeneans

1986 ◽  
Vol 12 (8) ◽  
pp. 1651-1658 ◽  
Author(s):  
G. C. Kearn
Keyword(s):  
Host Finding ◽  
Chemical Substances ◽  
Fish Hosts

Use of odor by host-finding insects: the role of real-time odor environment and odor mixing degree

Chemoecology ◽  
2021 ◽  
Author(s):  
Xinliang Shao ◽  
Ke Cheng ◽  
Zhengwei Wang ◽  
Qin Zhang ◽  
Xitian Yang
Keyword(s):  
Real Time ◽  
Host Finding

Cytological and cytochemical studies of centrifuged eggs of the slug Avion ater rufus L.

Development ◽  
1972 ◽  
Vol 27 (1) ◽  
pp. 1-13
Author(s):  
A. H. Sathananthan
Keyword(s):  
Electron Microscope ◽  
Cell Membrane ◽  
Sea Urchin ◽  
Cell Organelles ◽  
Chemical Substances ◽  
Important Chemical ◽  
Equatorial Band ◽  
Hyaline Zone ◽  
Egg Cortex

The stratification of various cell organelles and of important chemical substances have been studied in the eggs of the slug, after moderate centrifugation. As in other molluscs the egg contents stratify typically into three well-defined zones - lipid, L hyaline and yolky zones - but a distinct equatorial band of inclusions consisting mainly of F phagosomes and associated lysosomes was detected in the most centrifugal region of the hyaline zone. The sub-stratification of various cell inclusions in their respective zones was determined in some detail. The role of the cell membrane and egg cortex in the redistribution of these inclusions and the nature of the ergastoplasm are discussed in the light of electron-microscope studies of eggs of this slug and of the sea urchin.

The role of ?-amylase of symbiotic microflora in digestion by lower cestodes and their fish hosts

2005 ◽  
Vol 32 (2) ◽  
pp. 167-171 ◽  
Author(s):  
G. I. Izvekova ◽  
A. V. Komova
Keyword(s):  
Fish Hosts

The role of chemical cues in host finding and acceptance by Callosobruchus chinensis

2000 ◽  
Vol 96 (3) ◽  
pp. 213-219 ◽  
Author(s):  
S. Ignacimuthu ◽  
F.L. Wackers ◽  
S. Dorn
Keyword(s):  
Chemical Cues ◽  
Host Finding ◽  
Callosobruchus Chinensis

Consistent patterns of trophic niche specialization in host populations infected with a non-native copepod parasite

Parasitology ◽  
2017 ◽  
Vol 144 (7) ◽  
pp. 945-953 ◽  
Author(s):  
J. PEGG ◽  
D. ANDREOU ◽  
C. F. WILLIAMS ◽  
J. R. BRITTON
Keyword(s):  
Trophic Niche ◽  
Isotopic Niche ◽  
Trophic Specialization ◽  
Generalist Species ◽  
Copepod Parasite ◽  
Niche Specialization ◽  
Parasite Infections ◽  
Native Parasite ◽  
Fish Hosts

SUMMARYPopulations of generalist species often comprise of smaller sub-sets of relatively specialized individuals whose niches comprise small sub-sets of the overall population niche. Here, the role of parasite infections in trophic niche specialization was tested using five wild fish populations infected with the non-native parasite Ergasilus briani, a copepod parasite with a direct lifecycle that infects the gill tissues of fish hosts. Infected and uninfected fishes were sampled from the same habitats during sampling events. Prevalence in the host populations ranged between 16 and 67%, with parasite abundances of up to 66 parasites per fish. Although pathological impacts included hyperplasia and localized haemorrhaging of gill tissues, there were no significant differences in the length, weight and condition of infected and uninfected fishes. Stable isotope analyses (δ13C, δ15N) revealed that the trophic niche of infected fishes, measured as standard ellipse area (i.e. the isotopic niche), was consistently and significantly smaller compared with uninfected conspecifics. These niches of infected fishes always sat within that of uninfected fish, suggesting trophic specialization in hosts. These results suggested trophic specialization is a potentially important non-lethal consequence of parasite infection that results from impaired functional traits of the host.

The Role of Nutritional Principles in Biological Control

1966 ◽  
Vol 98 (11) ◽  
pp. 1121-1134 ◽  
Author(s):  
H. L. House
Keyword(s):  
Biological Control ◽  
Natural Environments ◽  
Insect Nutrition ◽  
Specific Chemical ◽  
Chemical Substances

AbstractThe role that nutrition plays in biological control may be seen in natural environments; but to understand and to make use of this role the principles concerned must be understood essentially in terms of specific chemical substances. A number of principles of insect nutrition particularly relevant to biological control concern the food of the host, the host itself, and its parasitoid. These principles may be generalized into three laws and they are called here the rule of sameness, the principle of nutrient proportionality, and the principle of cooperating supplements. Each is discussed in connection with its application in the laboratory or in natural environments, and a few examples of work relating to each are given. Most examples quoted are from work at Belleville, Ontario, on the parasitoid Pseudosarcophaga affinis Auct. nec. Fallén.

Host-Finding Behavior of Dinoderus bifoveolatus (Coleoptera: Bostrichidae), an Important Pest of Stored Cassava: the Role of Plant Volatiles and Odors of Conspecifics

1999 ◽  
Vol 92 (5) ◽  
pp. 766-771 ◽  
Author(s):  
Christian Borgemeister ◽  
Kerstin Schäfer ◽  
Georg Goergen ◽  
Symphorien Awande ◽  
Mamoudou Setamou ◽  
...  
Keyword(s):  
Plant Volatiles ◽  
Host Finding ◽  
Important Pest ◽  
Host Finding Behavior
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