Results 31 to 40 of about 3,946 (178)

Improving pikeperch larviculture by combining environmental, feeding and populational factors

open access: yesAquaculture Reports, 2020
Pikeperch (Sander lucioperca) has a high potential for inland aquaculture diversification in Europe. Bottlenecks (i.e. low survival, cannibalism and deformity rates) hamper further expansion of pikeperch culture, because of the weak production ...
T. Colchen   +5 more
doaj   +1 more source

Cannibalism in temporary waters. Simulations and laboratory experiments revealed the role of spatial shape in the mosquito Aedes albopictus [PDF]

open access: yes, 2018
Cannibalism is a commonly observed phenomenon in arthropod species having relevant consequences for population dynamics and individual fitness. It is a context-dependent behaviour and an understanding of the factors affecting cannibalism rate is crucial ...
Bellini, Romeo   +5 more
core   +2 more sources

Kin cannibals: recently hatched Philoria pughi tadpoles consume unhatched siblings in isolated terrestrial nests

open access: yesAustralian Journal of Zoology, 2022
Cannibalism is a behaviour exhibited across amphibian life history stages; however, there are few records that involve cannibalism between siblings. Here, we describe observations of recently hatched tadpoles of the frog Philoria pughi consuming sibling embryos with delayed or failed development.
John Gould   +2 more
openaire   +1 more source

The presence of micropyles in the shells of developing and undeveloped eggs of the ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae)

open access: yesEuropean Journal of Entomology, 2009
In Hymenoptera and Heteroptera, the absence of micropyles is one criterion for categorizing an egg as trophic. Undeveloped eggs are observed in more than 90% of the egg clusters of the ladybird beetle Harmonia axyridis Pallas.
Naoya OSAWA, Arata YOSHINAGA
doaj   +1 more source

Climate Change and Highland Malaria: Fresh Air for a Hot Debate [PDF]

open access: yes, 2010
In recent decades, malaria has become established in zones at the margin of its previous distribution, especially in the highlands of East Africa.
Chaves, L.F., Koenraadt, C.J.M.
core   +2 more sources

Hatching asynchrony, sibling aggression and cannibalism in the Bearded VultureGypaetus barbatus

open access: yesIbis, 2004
We report data on laying and hatching asynchrony in the Bearded VultureGypaetus barbatus, and provide the first detailed description of the provisioning of nestlings, sibling aggression and cannibalism. The results suggest that brood reduction was mediated through the age and size differences between siblings, which resulted in the superior competitive
Margalida, Antoni   +3 more
openaire   +2 more sources

Prevalence of male-killer in a sympatric population of two sibling ladybird species, Harmonia yedoensis and Harmonia axyridis (Coleoptera: Coccinellidae)

open access: yesEuropean Journal of Entomology, 2014
In predatory ladybirds male embryos in clutches of eggs infected with male-killing bacterial endosymbionts do not hatch and are consumed by female hatchlings.
Suzuki NORIYUKI   +2 more
doaj   +1 more source

Oviposition strategy of the green lacewing Chrysoperla rufilabris (Neuroptera: Chrysopidae) in response to extraguild prey availability

open access: yesEuropean Journal of Entomology, 2000
The capacity of the green lacewing Chrysoperla rufilabris (Burmeister) to modify its oviposition strategy in response to extraguild prey availability in an oviposition site was studied.
Bruno FRÉCHETTE, Daniel CODERRE
doaj   +1 more source

Leptodactylus knudseni [PDF]

open access: yes, 2006
Number of Pages: 12Integrative BiologyGeological ...
Heyer, Miriam Muedeking   +1 more
core   +1 more source

Invasive Egg Predators and Food Availability Interactively Affect Maternal Investment in Egg Chemical Defense

open access: yesFrontiers in Ecology and Evolution, 2018
Invasive species commonly predate the offspring of native species and eggs are the life stage most vulnerable to this predation. In many species with no maternal care, females can alter the phenotype of eggs to protect them, for instance through chemical
Sarah C. Paul   +5 more
doaj   +1 more source

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