منابع مشابه
Ptenidium pusillum (Gyllenhal, 1808) from egg to pupa (Coleoptera: Ptiliidae).
Eggs, larvae and pupae of Ptenidium pusillum obtained by rearing adults are described. Larval chaetotaxy is treated in detail. Two larval instars are identified, differing in minor chaetotaxic characters, pigmentation and measurements. The lack of urogomphi, confirmed in Ptenidium, is discussed in the context of current systematics of Ptiliidae. Serial chaetotaxic homology and between-instar ho...
متن کاملFree-living Willow Ptarmigan Are Determinate Egg-layers
Egg-laying behavior of free-living Willow Ptarmigan (Lagopus lagopus) was studied at Chilkat Pass, B.C. to learn if females were indeterminate egg-layers in natural conditions. Eggs were removed from clutches of experimental birds during laying, usually beginning with the third egg. All birds were determinate egg-layers and there was no difference in the number of eggs laid by control (K = 8.11...
متن کاملPhenotypic plasticity in a willow leaf beetle depends on host plant species: release and recognition of beetle odors.
Aggregation behavior of herbivorous insects is mediated by a wide range of biotic and abiotic factors. It has been suggested that aggregation behavior of the blue willow leaf beetle Phratora vulgatissima is mediated by both host plant odor and by odor released by the beetles. Previous studies show that the beetles respond to plant odors according to their prior host plant experiences. Here, we ...
متن کاملSoil nutrients and water availability interact to influence willow growth and chemistry but not leaf beetle performance
We investigated the effects of soil nutrient and water availability on the growth and chemistry of the silky willow ( Salix sericea Marshall), and on the performance of the imported willow leaf beetle ( Plagiodera versicolora Laichartig). Our major aims were to determine whether there are nutrient–water interactions on plant traits and whether this leads to parallel interactions for herbivore p...
متن کاملThe effect of renesting ability and nesting attempt on egg-size variation in willow ptarmigan
SANDERCOCK, B.K., and PEDERSEN, H.C. 1994. The effect of renesting ability and nesting attempt on egg-size variation in willow ptarmigan. Can. J. Zool . 72: 2252 2255. Interclutch variation in the size of free-living willow ptarmigan (Lagopus lagopus alexandrae) eggs was examined at Chilkat Pass, British Columbia. Egg volume (19.9 f 0.1 cm3; mean f 1 SE) fell within the range reported for other...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1970
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay4214