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• W2023757209 abstract "Phaeacius malayensis (Salticidae: Spartaeinae) is an atypical jumping spider that routinely includes other jumping spiders in its diet. This paper presents the first detailed study of P. malayensis' prey preferences. Three basic types of tests of prey preference were used: different types of prey were provided on alternate days (alternate-day tests), two types of prey were provided simultaneously (simultaneous-presentation tests), and an alternative prey type was provided while the predator was already feeding (alternative-prey tests). In alternate-day and simultaneous- presentation testing, but not in alternative-prey testing, ( i) P. malayensis preferred spiders (salticids and hunting spiders) to insects; (ii) P. malayensis preferred salticids to hunting spiders; ( iii) these preferences were not exhibited in some paired choices when the background was nonmatching, indicating that visual concealment is important with respect to some, but not all, prey; (iv) P. malayensis' prey preferences were not affected by a prior 14-day period without food; (v) after 21 days of fasting, P. malayensis took different types of prey indiscriminately. The adaptive significance of preferences for particular types of prey is discussed in the context of optimal-foraging theory. Resume : Phaeacius malayensis (Salticidae : Spartaecinae) est une araignee sauteuse atypique qui consomme couram- ment d'autres araignees sauteuses. Les preferences de P. malayensis pour certaines proies sont decrites ici en details. Trois types de tests ont servi a evaluer les preferences : differents types de proies presentes tous les 2 jours (tests des jours en alternance), deux types de proies presentes en meme temps (test des presentations simultanees), ou un type de proie presente alors que le predateur est deja en train de se nourrir (test de presentation d'une proie de rechange). Le test des jours en alternance et le test des presentations simultanees, mais pas le test de la proie de rechange, ont de- montre que (i) P. malayensis prefere les araignees (Salticides et araignees chasseuses) aux insectes; ( ii) que P. malayen- sis prefere les araignees sauteuses aux araignees chasseuses; (iii) que ces preferences ne s'expriment pas lorsque le substrat est contrastant, ce qui indique que le camouflage est important pour certaines proies, mais pas pour toutes; (iv) que les preferences de P. malayensis pour certaines proies ne sont pas affectees par un jeune prealable de 14 jours et (v) qu'apres 21 jours de jeune, P. malayensis consomme indifferemment n'importe quelle proie. L'importance evolu- tive des preferences pour des types particuliers de proies est examinee dans le contexte de la theorie de la quete opti - male. (Traduit par la Redaction) 2226" @default.
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• W2023757209 date "2000-01-01" @default.
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• W2023757209 title "Prey preferences of <i>Phaeacius malayensis</i>, a spartaeine jumping spider (Araneae: Salticidae) from Singapore" @default.
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• W2023757209 doi "https://doi.org/10.1139/cjz-78-12-2218" @default.
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