Matches in SemOpenAlex for { <https://semopenalex.org/work/W404926914> ?p ?o ?g. }
- W404926914 endingPage "633" @default.
- W404926914 startingPage "617" @default.
- W404926914 abstract "Data were collected on annual (1980-1983) and seasonal (spring vs. summer) variation in reproduction by the double-brooded Eastern Phoebe (Sayornis phoebe) to test the proposal that phoebes modify reproductive patterns on a seasonal basis and switch from being brood survivalists in spring to brood reductionists in summer. Clutch size did not differ between spring and summer broods nor among years, but spring nests fledged one more nestling than summer nests. In 1981 breeding began earlier, eggs were larger, and nestlings grew faster than in all other years. Clutch size and egg mass within spring clutches increased seasonally. Egg mass was also larger in summer clutches. These observations suggest that food is usually limited during the initiation of spring clutches. However, because spring broods were more productive than summer broods, I predicted that phoebes should act as brood survivalists in spring, but become brood reductionists in summer. All predictions were supported. During the spring: (a) clutches hatched synchronously; (b) egg mass increased significantly with laying order; (c) hatch order had little impact on nestling growth and; (d) last-hatched young fledged as frequently as their siblings. However, during the summer: (a) clutches hatched asynchronously; (b) egg mass did not consistently vary with laying sequence; (c) hatch order had a significant negative impact on growth; and (d) last-hatched young fledged only about 50% of the time. Thus, phoebes seemed to adaptively shift reproductive patterns seasonally, switching from a brood-survivalist strategy in spring to a brood-reductionist strategy in summer. However, I suggest that proximate responses to food availability provide a more parsimonious explanation for the observed patterns. The increase in egg mass with laying sequence was most likely the result of progressive increases in food availability in spring. Higher food availability and reduced energy demands during summer probably also allowed females to lay uniformly large eggs and start incubation sooner. The latter resulted in greater hatching asynchrony in summer clutches. The poorer growth and higher mortality of last-hatched young in summer resulted from a severe size disadvantage that was the result of the greater asynchrony of summer broods. Thus, brood reduction in summer was probably an incidental and nonadaptive outcome of hatching asynchrony. Received 21 January 1993, accepted 31 May 1993. FOOD HAS A DIRECT, proximate impact on avian reproductive processes (Davies and Lundberg 1985, Hussell and Quinney 1987, Martin 1987, Nilsson 1991) and variation in the availability of food may have greatly influenced the evolution of reproductive patterns of birds (Lack 1947, Howe 1976, 1978, O'Connor 1978, Martin 1987). For most birds, especially those that feed their young, future unpredictability of food is a major constraint, and females may often enter the breeding season without being able to predict optimal clutch size (i.e. size that produces maximum number of fledglings). Lack (1947) and Ricklefs (1965) argued that the combination of hatching asynchrony and brood reduction 1 Present address: Department of Biology, Hartwick College, Oneonta, New York 13820, USA. (i.e. starvation of smallest nestling during periods of food shortage) was an evolved, adaptive phenomenon that allowed parents to contend with unpredictability in food supplies. Asynchronously hatched clutches made it possible for parents to (1) fledge all of their young during occasional periods of high food availability, yet also (2) reduce brood size to a level commensurate with their feeding capacity when food was in short supply. Experimental evidence exists to support Lack's model (e.g. Magrath 1989, Hebert 1993). However, several other variables have been suggested as important factors in the evolution of hatching asynchrony (for review, see Magrath 1990, Nilsson 1993), the most widely acknowledged being nest predation (Clark and Wilson 1981, Hussell 1985; see below). Although generally presented as alternatives, it is possible for two or more fac-" @default.
- W404926914 created "2016-06-24" @default.
- W404926914 creator A5031401191 @default.
- W404926914 date "1994-01-01" @default.
- W404926914 modified "2023-09-24" @default.
- W404926914 title "Breeding patterns of eastern phoebes in Kansas: adaptive strategies or physiological constraint?" @default.
- W404926914 cites W100569778 @default.
- W404926914 cites W1966025507 @default.
- W404926914 cites W1966581057 @default.
- W404926914 cites W2010478517 @default.
- W404926914 cites W2024263979 @default.
- W404926914 cites W2024670369 @default.
- W404926914 cites W2027515295 @default.
- W404926914 cites W2041403801 @default.
- W404926914 cites W2053067055 @default.
- W404926914 cites W2053780863 @default.
- W404926914 cites W2058218422 @default.
- W404926914 cites W2065353765 @default.
- W404926914 cites W2075663762 @default.
- W404926914 cites W2083366465 @default.
- W404926914 cites W2085512181 @default.
- W404926914 cites W2091337440 @default.
- W404926914 cites W2107981210 @default.
- W404926914 cites W2164414765 @default.
- W404926914 cites W2169874238 @default.
- W404926914 cites W2177269677 @default.
- W404926914 cites W2313435636 @default.
- W404926914 cites W2314276233 @default.
- W404926914 cites W2315912211 @default.
- W404926914 cites W2318122092 @default.
- W404926914 cites W2320858877 @default.
- W404926914 cites W2322791628 @default.
- W404926914 cites W2325171640 @default.
- W404926914 cites W2325987112 @default.
- W404926914 cites W2326866764 @default.
- W404926914 cites W2328857778 @default.
- W404926914 cites W2329252171 @default.
- W404926914 cites W2332155349 @default.
- W404926914 cites W2332774182 @default.
- W404926914 cites W2333076908 @default.
- W404926914 cites W2334678977 @default.
- W404926914 cites W2461591865 @default.
- W404926914 cites W2468856041 @default.
- W404926914 cites W2471222485 @default.
- W404926914 cites W2514950067 @default.
- W404926914 cites W2520848562 @default.
- W404926914 cites W2531312481 @default.
- W404926914 cites W3184931374 @default.
- W404926914 cites W578772052 @default.
- W404926914 cites W2460486127 @default.
- W404926914 cites W63018854 @default.
- W404926914 hasPublicationYear "1994" @default.
- W404926914 type Work @default.
- W404926914 sameAs 404926914 @default.
- W404926914 citedByCount "10" @default.
- W404926914 crossrefType "journal-article" @default.
- W404926914 hasAuthorship W404926914A5031401191 @default.
- W404926914 hasConcept C114265396 @default.
- W404926914 hasConcept C121332964 @default.
- W404926914 hasConcept C127413603 @default.
- W404926914 hasConcept C18903297 @default.
- W404926914 hasConcept C2778712887 @default.
- W404926914 hasConcept C30358287 @default.
- W404926914 hasConcept C59659247 @default.
- W404926914 hasConcept C65532224 @default.
- W404926914 hasConcept C78519656 @default.
- W404926914 hasConcept C86803240 @default.
- W404926914 hasConcept C90856448 @default.
- W404926914 hasConcept C97355855 @default.
- W404926914 hasConceptScore W404926914C114265396 @default.
- W404926914 hasConceptScore W404926914C121332964 @default.
- W404926914 hasConceptScore W404926914C127413603 @default.
- W404926914 hasConceptScore W404926914C18903297 @default.
- W404926914 hasConceptScore W404926914C2778712887 @default.
- W404926914 hasConceptScore W404926914C30358287 @default.
- W404926914 hasConceptScore W404926914C59659247 @default.
- W404926914 hasConceptScore W404926914C65532224 @default.
- W404926914 hasConceptScore W404926914C78519656 @default.
- W404926914 hasConceptScore W404926914C86803240 @default.
- W404926914 hasConceptScore W404926914C90856448 @default.
- W404926914 hasConceptScore W404926914C97355855 @default.
- W404926914 hasIssue "3" @default.
- W404926914 hasLocation W4049269141 @default.
- W404926914 hasOpenAccess W404926914 @default.
- W404926914 hasPrimaryLocation W4049269141 @default.
- W404926914 hasRelatedWork W1971579340 @default.
- W404926914 hasRelatedWork W1979998814 @default.
- W404926914 hasRelatedWork W2017917281 @default.
- W404926914 hasRelatedWork W2085512181 @default.
- W404926914 hasRelatedWork W2106841717 @default.
- W404926914 hasRelatedWork W2147451227 @default.
- W404926914 hasRelatedWork W2320858877 @default.
- W404926914 hasRelatedWork W2395630955 @default.
- W404926914 hasRelatedWork W2492826474 @default.
- W404926914 hasVolume "111" @default.
- W404926914 isParatext "false" @default.
- W404926914 isRetracted "false" @default.
- W404926914 magId "404926914" @default.