Results 51 to 60 of about 143,183 (293)
Hydra effects predator-prey bazykin's model with stage-structure and intraspecific for predator
Desimal: Jurnal Matematika, 2022 Bazykin's predator-prey population model is considered to represent the exchange stability condition of population growth. The existence of the hydra effect and, at the same time, analyzing its influence on population growth. The condition of the model divides the species into a stage structure, namely, prey, immature predators, and mature predators ...
Rian Ade Pratama +3 more
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Evaluating Bergmann's and Allen's rules in the long bones of the eastern gray squirrel
The Anatomical Record, EarlyView.Abstract Ecogeographical rules predict variation in body size and appendage proportions across climatic gradients, yet intraspecific tests using long bones from wild populations remain limited among small mammals. This study tests the hypothesis that eastern gray squirrels (Sciurus carolinensis) conform to Bergmann's rule, that is, body size increases ...
Tyler Blake, Habiba Chirchir
wiley +1 more source
Habitat stability and predation pressure affect temperament behaviours in populations of three-spined sticklebacks [PDF]
, 2008 1. There is growing interest in the causes and consequences of animal temperaments. Temperament behaviours often have heritable components, but ecological variables can also affect them. Numerous variables are likely to differ between habitats, and these
Colegrave, Nick +4 more
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Predatory Functional Response of Harmonia sedecimnotata to Aphis craccivora
Guangdong nongye kexue【Objective】The study was conducted to clarify the predation capacity of Harmonia sedecimnotata on Aphis craccivora, with a view to providing a theoretical basis for field control of A. craccivora by H. sedecimnotata.【Method】H.
Jiaru DENG +3 more
doaj +1 more source
Trade-offs between predation risk and growth benefits in the copepod Eurytemora affinis with contrasting pigmentation. [PDF]
PLoS ONE, 2013 Intraspecific variation in body pigmentation is an ecologically and evolutionary important trait; however, the pigmentation related trade-offs in marine zooplankton are poorly understood.
Elena Gorokhova +2 more
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Predators weaken prey intraspecific competition through phenotypic selection
Ecology Letters, 2020 Abstract Predators have a key role shaping competitor dynamics in food webs. Perhaps the most obvious way this occurs is when predators reduce competitor densities. However, consumption could also generate phenotypic selection on prey that determines the strength of competition, thus coupling consumptive and trait‐based effects of ...
Adam M. Siepielski +5 more
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Pattern formation induced by intraspecific interactions in a predator-prey system [PDF]
Physical Review E, 2019 13 pages, 11 ...
Luciano Stucchi +2 more
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Sex-biased predation and predator intraspecific competition effects in a prey mating system
AIMS Mathematics, 2023 <abstract><p>In this work, we propose and investigate a predator-prey model where the prey population is structured by sex and the predators (unstructured) depredate based on sex-bias. We provide conditions for the existence of equilibrium points and perform local stability analysis on them.
Eric M. Takyi +3 more
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The Anatomical Record, EarlyView.Abstract The Australasian crocodylian fossil record is dominated by the extinct endemic clade Mekosuchinae, with known members spanning the Eocene‐to‐Holocene. This diverse clade exhibited high morphological disparity, from early members superficially similar to Crocodylus, to more terrestrial forms later in the clade's evolutionary history.
Devin K. Hoffman +9 more
wiley +1 more source
Phyllomedusa: Journal of Herpetology, 2023 Following the observation of adult pairs of the Western Whipsnake, Hierophis viridiflavus, in a controlled environment, two distinct but related phenomena were observed: egg deposition and predation of freshly laid eggs by the male.
Alessandro Paterna
doaj