Now showing items 1-10 of 967
Variation in the size of eggs of Kelp Gulls (Larus dominicanus) at two colonies in Patagonia, Argentina
(Waterbird Soc, 2015)
Although several studies have reported basic information about the size of Kelp Gull (Larus dominicarius) eggs, no attention has been paid to the comparison of patterns of intra-clutch variation at different breeding sites. ...
Susceptibility of Nezara Viridula (L.) (Hemiptera: Pentatomidae) egg masses of different sizes to parasitism by Trissolcus Basalis (Woll.) (Hymenoptera: Platygastridae) in the field
(Sociedade Entomológica Do Brasil, 2013-11)
Egg masses of Nezara viridula (L.) are commonly parasitized by Trissolcus basalis (Woll.), and we investigated the role of size of egg masses on parasitization by T. basalis. Sentinel egg masses were exposed to parasitism ...
Strategic egg destruction by brood-parasitic cowbirds?
Obligate avian brood parasites do not provide direct care to their young but can indirectly increase their offspring's success in host nests. One way in which parasitic cowbirds (Molothrus sp.) could achieve this is through ...
Uncommon mechanism of egg incubation in the endemic Southern hermit crab Loxopagurus loxochelis: how is this phenomenon related to egg production?
(BLACKWELL PUBLISHING, 2008)
The aim of the present work was to characterize the egg production of Loxopagurus loxochelis. A total of 71 ovigerous females were obtained, 28% of which were simultaneously incubating eggs at different developmental stages. ...
GENETIC ANALYSIS OF FEMALE REPRODUCTION TRAITS OF FANNED COHO SALMON (ONCORHYNCUS KISUTCH)
(ELSEVIER SCIENCE BV, 2004)
Based on 8 years of data on 891 daughters from 190 sires and 398 dams, females produced an average (standard deviation) of 4251 (957) green eggs with a total weight of about 680 (191) g; the females produced 3226 (1255) ...
Calcium levels and limestone particle size in the diet of commercial layers at the end of the first production cycle
(Fundação APINCO de Ciência e Tecnologia Avícolas, 2009-06-01)
This study evaluated the effect of dietary calcium levels and limestone particle size distribution on first-cycle layer performance and egg quality. A completely randomized experimental design in 4x3 factorial arrangement ...
Size variation in eggs laid by normal-sized and miniature queens of Plebeia remota (Holmberg) (Hymenoptera: Apidae: Meliponini).
(Sociobiology, v. 61, n. 4, p. 483-489, dec. 2014., 2014)
Reproductive biology in the South Western Atlantic genus Buccinanops (Nassariidae): the case of Buccinanops paytensis
(Magnolia Press, 2016-03)
The reproductive biology of the nassariid Buccinanops paytensis is considered and compared with the other species in the genus. In B. paytensis an average of 42 egg capsules were attached to the shell of each female. A ...
Experimental evidence for an antipredatory function of egg rejection behaviour in a common host of the brood-parasitic shiny cowbird
Abstract: The rejection of foreign eggs is the most effective adaptation against brood parasitism in birds. Many hosts, however, show suboptimal responses towards parasitic eggs, which could reflect a compromise between ...
TEMPERATURE AND FEMALE SIZE EFFECTS ON EGG PRODUCTION OF CALANUS CHILENSIS: LABORATORY OBSERVATIONS
(SOC BIOLGIA CHILE, 1996)
Three experiments under laboratory condition were conducted to study the effect of temperature and female size, measured as prosome length and dry weight, on egg production and egg viability of Calanus chilensis Brodsky ...