Proximate factors influencing egg cannibalism in the land snail Arianta arbustorum (Pulmonata, Helicidae)

Oecologia ◽  
1986 ◽  
Vol 70 (2) ◽  
pp. 283-287 ◽  
Author(s):  
Bruno Baur ◽  
Anette Baur
Keyword(s):  
Land Snail ◽  
Egg Cannibalism ◽  
Factors Influencing ◽  
Proximate Factors ◽  
Arianta Arbustorum

Effects of early feeding experience and age on the cannibalistic propensity of the land snail Arianta arbustorum

1987 ◽  
Vol 65 (12) ◽  
pp. 3068-3070 ◽  
Author(s):  
Bruno Baur
Keyword(s):  
Land Snail ◽  
Early Feeding ◽  
Vegetable Food ◽  
Egg Cannibalism ◽  
Feeding Experience ◽  
Arianta Arbustorum ◽  
Genetically Determined

The influence of early feeding experience on egg cannibalism was examined in hatchlings of the land snail Arianta arbustorum. The propensity for cannibalism was not affected by cannibalistic or by vegetarian early feeding experience. It was, however, negatively correlated with the age of the snails. Freshly hatched snails with no prior feeding experience chose eggs exclusively, while 16-day-old snails preferred vegetable food. Furthermore, the cannibalistic propensity varied between offspring from different clutches. Restriction of the cannibalistic propensity to the hatchling stage, its nonmodifiability, and differences in its extent between clutches suggest that egg cannibalism in A. arbustorum is a genetically determined trait.

Can Cannibalistic Hatchlings of the Land Snail Arianta Arbustorum Distinguish Between Sib and Non-Sib Eggs?

Behaviour ◽  
1987 ◽  
Vol 103 (4) ◽  
pp. 259-265 ◽  
Author(s):  
Bruno Baur
Keyword(s):  
Kin Recognition ◽  
Land Snail ◽  
Apparent Lack ◽  
Egg Cannibalism ◽  
Arianta Arbustorum

AbstractIn the field hatchlings of the land snail Arianta arbustorum have been observed devouring eggs from sib as well as non-sib clutches. In the laboratory newly hatched A. arbustorum were tested for their ability to distinguish between eggs of different degrees of relatedness. In these experiments hatchlings did not discriminate between sib, other kin and non-kin eggs. Snails from three populations showed the same egg preferences, but they differed in their propensity for cannibalism. Despite the apparent lack of sib and kin recognition, egg cannibalism in A. arbustorum may be adaptive, even among siblings, because of the nutritional and energetic benefits.

Proximate factors influencing dispersal decisions in male mountain gorillas, Gorilla beringei beringei

2009 ◽  
Vol 77 (5) ◽  
pp. 1155-1164 ◽  
Author(s):  
Tara S. Stoinski ◽  
Veronica Vecellio ◽  
Theogene Ngaboyamahina ◽  
Felix Ndagijimana ◽  
Stacy Rosenbaum ◽  
...  
Keyword(s):  
Mountain Gorillas ◽  
Factors Influencing ◽  
Gorilla Beringei Beringei ◽  
Gorilla Beringei ◽  
Proximate Factors
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