Results 21 to 30 of about 16,676 (108)

Anti‐Predation and Size‐Dependent Gas Exchange Functions of Amazonian Architect Cicada Towers

open access: yesBiotropica, Volume 58, Issue 2, March 2026.
Clay towers built by cicada nymphs before metamorphosis are poorly understood. We experimentally show that towers of the Amazonian cicada Guyalna chlorogena reduce predation risk and exhibit size‐dependent growth responses to gas exchange obstruction, supporting their interpretation as adaptive extended phenotypes.
Marina Mega   +5 more
wiley   +1 more source

Efeito do habitat na fecundidade das fêmeas, sobrevivência e razão sexual dos jovens de jacarés-do-pantanal. [PDF]

open access: yes, 2011
A fecundidade das fêmeas, sobrevivência dos ovos e a razão sexual dos filhotes recém-eclodidos de Caiman crocodilus yacare foram estudados nas fazenda Nhumirim (área de lagos) e Campo Dora (área de rios intermitentes) no Pantanal.
CAMPOS, Z. M. da S.
core   +1 more source

Social media highlights the overlooked impact of cats on arthropods

open access: yesInsect Conservation and Diversity, Volume 19, Issue 2, Page 460-465, March 2026.
The impact of domestic cats on vertebrate biodiversity is unequivocal; however, we still know little about their effects on arthropods. By analysing over 17,000 photos and videos from social media platforms (iStock and TikTok), we documented 550 predation events of cats on arthropods.
Leticia Alexandre, Raul Costa‐Pereira
wiley   +1 more source

Ecologia de sementes de Pithecolobium racemosum Ducke. () [PDF]

open access: yesActa Amazonica, 1981
Resumo Observações da frutificação, predação e germinação de sementes, levando em consideração a luminosidade e a alelopatia, bem como o crescimento inicial de Pithecolobium racemosum Ducke, são aqui expostos. A produção de frutos mostra um padrão bienal,
Angela M. C. Leite, Judy M. Rankin
doaj   +1 more source

Potencial de predação de três espécies de fitoseídeos sobre Oligonychus ilicis (McGREGOR, 1917)(Acari: Tetranychidae). [PDF]

open access: yes, 2011
O ácaro-vermelho, Oligonychus ilicis (McGregor, 1917), é um dos principais ácaros fitófagos do cafeeiro (Coffea spp.), sendo responsável por causar o bronzeamento nas folhas e como conseqüência do ataque há redução da capacidade fotossintetizadora das ...
ALTOÉ, B. F.   +3 more
core  

Testing the size‐grain hypothesis in a generalist predator: The case of an ant species in the Brazilian savannah

open access: yesJournal of Zoology, Volume 328, Issue 3, Page 234-247, March 2026.
In our recent study, we examined whether ants in the Brazilian Cerrado follow the “grain‐size hypothesis,” which proposes that larger ants should have proportionally longer legs to move efficiently across different environments. We used Ectatomma permagnum, a common predatory ant in the Cerrado, measuring hundreds of individuals collected from various ...
A. Sandim, R. Aranda
wiley   +1 more source

Effects of light-dark cycle on the spatial distribution and feeding activity of fish larvae of two co-occurring species (Pisces: Hypophthalmidae and Sciaenidae) in a Neotropical floodplain lake

open access: yesBrazilian Journal of Biology, 2018
Most studies on mechanisms regulating fish larvae processes have focused on assessing the isolated effects of food distribution and feeding behavior. However, in natural ecosystems, fish larvae may strongly interact with zooplankton organisms in an array
P. H. S. Picapedra   +2 more
doaj   +1 more source

Introdução e desenvolvimento da agricultura sustentável na restinga da Lagoa Mirim. [PDF]

open access: yes, 2011
bitstream/item/43890/1/boletim-16 ...
COELHO, R. W. C.   +4 more
core  

Climate Change‐Induced Distribution Shifts of Keratin‐Feeding Beetle Omorgus (Omorgus) suberosus: Implications for Olive Ridley Sea Turtle Lepidochelys olivacea Conservation

open access: yesAnimal Conservation, Volume 28, Issue 6, Page 803-816, December 2025.
Our study projects significant climate change‐induced distribution shifts of a keratin‐feeding beetle Omorgus suberosus, with expansions into higher latitudes in Europe and North America and notable habitat losses in tropical regions by 2100. Ecological niche models predict a global habitat reduction of 9.5% under SSP2–4.5 and 20.8% under SSP5–8.5 ...
Janderson Batista Rodrigues Alencar   +4 more
wiley   +1 more source

Comportamento alimentar da cobra d’água amazônica Helicops hagmanni Roux, 1910 (Reptilia: Squamata: Colubridae: Hydropsini)

open access: yesBoletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2008
O gênero Helicops inclui, atualmente, 15 espécies, das quais onze ocorrem na floresta amazônica. Helicops hagmanni se alimenta de peixes e apresenta hábitos noturnos, mas dados detalhados sobre seu comportamento alimentar e ecologia são escassos.
Marcelo José Sturaro   +1 more
doaj   +1 more source

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