El verderón común (Carduelis chloris): población nidificante, tamaño de la puesta y éxito reproductor. Un ejemplo de estudios a largo plazo

Alberti, José Antonio Gil-Delgado; Catalá, Manela

doi:10.14198/mdtrra1989.11.07

Cited by 8 publications

(19 citation statements)

References 15 publications

(8 reference statements)

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“…The average clutch size of both species varies as the season progresses, and at the end of the breeding season clutch sizes are smaller (Gil-Delgado & Catalá 1989, Gil-Delgado et al 1991. The quadratic equations that were applied show a variation typical of multi-brooded species: the clutch sizes of both Greenfinches and Goldfinches initially increase with a peak in mid-season and then a decline (Fig.…”

Section: Resultsmentioning

confidence: 97%

“…The sample size differed from year to year, as did the size of the breeding population of both species (e.g. Gil-Delgado & Catalá 1989, Gil-Delgado et al 1991. For Goldfinches only, data from 1985 onwards were used because the Goldfinch population breeding in the plot was too small or absent prior to that (Gil-Delgado et al 1991).…”

Section: Study Area and Methodsmentioning

confidence: 99%

“…The Greenfinch Carduelis chloris and Goldfinch C. carduelis populations of these plantations have been studied previously (e.g. Gil-Delgado & Catalá 1989, Gil-Delgado et al 1991. Seeds constitute the main diet of the nestlings for both species (Newton 1972, Cramp & Perrins 1994.…”

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confidence: 99%

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Seasonal clutch size variation of multi‐brooded bird species: comparisons between breeding season and latitudes

Gil‐Delgado

Marco

Paredes

et al. 2004

Ibis

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Single-and multi-brooded species of birds differ in their seasonal patterns of clutch size. Single-brooded species start with a maximum clutch size that declines continuously as the season progresses, whereas the clutch sizes of multi-brooded species usually increase to a mid-season maximum peak and then decrease progressively until the end of the breeding season. Previous studies have shown that multi-brooded migrant species present seasonal patterns that are similar to single-brooded species at high latitudes but similar to multibrooded non-migratory species at lower latitudes. We studied the Greenfinch Carduelis chloris and Goldfinch C. carduelis populations in eastern Spain (Sagunto, Valencia) between 1975 and to compare seasonal variations in clutch sizes between years with early and late starts to the breeding season. The period over which clutch sizes increase was longer when the breeding season started earlier. The Goldfinch population showed no pattern of initial increase in clutch size when there was a late start to the breeding season: a late start shortens the season giving them less time to breed, and may also coincide with maximum food availability. Thus, the pattern of single-brooded species was observed. In the Greenfinch population, a trend toward the seasonal pattern of single-brooded species was also observed when the following indices were compared: clutch size increase, modal timing, initial slope and timing of maximum clutch size. We have also compared the seasonal patterns of clutch size of both species in eastern Spain with the patterns observed in Britain. Our results show that for both Goldfinches and Greenfinches, the non-migrant southern populations of Sagunto in eastern Spain do not tend towards a more multi-brooded seasonal pattern of clutch size than the migrant Goldfinches of Britain.Passerine birds use two tactics to maximize their number of offspring per breeding season. In singlebrooded species, the clutch size is at its maximum at the start of the breeding season and declines as the season progresses. Multi-brooded species, however, present a different pattern. Their breeding season is longer and females lay several clutches with a midseason peak of clutch size (Lack 1954, Klomp 1970. Therefore, in multi-brooded species, seasonal reproductive success is determined not only by the productivity of each brood but also by the number of broods raised (Bryant 1979, Desrochers & Magrath 1993. As a consequence, Crick et al. (1993) suggested that multi-brooded species start laying before the optimal moment, which accounts for the increase in clutch sizes until the optimal time, when clutch sizes are the largest. In addition, a tendency to start breeding earlier would be normal as it would allow a greater number of clutches per season. Furthermore, the same species might present both patterns across its distribution range if it is made up of non-migrant as well as migrant populations. The Eastern Bluebird Sialia sialis shows an initial increase in the size of clutches in the southern p...

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Section: Resultsmentioning

confidence: 97%

Section: Study Area and Methodsmentioning

confidence: 99%

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Seasonal clutch size variation of multi‐brooded bird species: comparisons between breeding season and latitudes

Gil‐Delgado

Marco

Paredes

et al. 2004

Ibis

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“…The breeding ecology of the Goldfinch has received less attention than that of other finch species, although population trends, food, seed preference, and some other topics have been studied both in its original área of distribution and in áreas where it has been introduced (Conder 1948, Frith 1957, Newton 1967, Sharrock 1976, Glück 1980, 1985 There are few studies on the Goldfinch in the Iberian Península, and these refer to feeding, migration, distribution, and density valúes from habitats where the avifauna has been studied (Gil 1928, Herrera 1978, Señar and Borras 1983, Gil-Delgado 1983, Asensio 1986.…”

Section: Introductionmentioning

confidence: 99%

“…The Serin Serinus serinus shows a decline in breeding success as the season progesses (Gil-Delgado 1981), and the Greenfinch Carduelis chloris experiences more nest failvres at the end of the breeding season (Gil-Delgado and Cá-tala 1989). In both species mortality by starvation is higher than by preda-tion at the end of the breeding season (Gil-Delgado andGómez 1988, GilDelgado andCátala 1989). Therefore, if these pattems apply to all cardueline finches in orange groves, we could expect similar results for the Goldfinch.…”

Section: Introductionmentioning

confidence: 99%

Breeding success of the goldfinch Carduelis carduelis in orange plantations: the effect of predation and starvation

Alberti¹,

Catalá²,

Campos³

1991

MDTRRA

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SUMMARYSome aspects of the breeding ecology of the Goldfinch Carduelis carduelis were studied during fifteen years in eastern Spain. Density varied between 0-0.6 breeding pairs per 10 Ha. Egg laying usually lasted from early March to early July. The average number of nesting attempts per pair was 3.1. (range 2-4), and no more than three successful clutches per pair were detected. The mean clutch size was 4.0 eggs in February-March, 4.5 during April-May, and 3.8 during June-July, the difference between the last two periods being significant. The eggs were incubated an average of 13.3 days, and the nestlings remained in the nests a mean of 13.9 days. Breeding success decreased significantly during the season from 80% in FebruaryMarch to 19% in June-July. No nestling starved during February-March but one third of the nestlings starved during the last two periods. Predation was highest during June-July. Each pair laying 3-4 clutches fledged an average of 6.7 (range 0-10) young per year and 59% of all nests produced at least one fledgling.Laying dates and clutch size of the Goldfinch at Sagunto fitted the general trends of starting breeding earlier and laying smaller clutches as the latitude decreases. However, the seasonal pattern of nesting failure was opposite to that described in other habitats. Probable causes are discussed.KEY WORDS: Breeding season, Breeding success, Carduelis carduelis, Causes of nesting failure, Clutch size, Orange groves, Sagunto (East Spain). RESUMENSe presentan los resultados de un estudio sobre la ecología de reproducción del jilguero Carduelis carduelis realizado en cultivos de naranjo en Sagunto (España) durante 15 años. La densidad osciló entre 0 y 6.6 parejas nidificantes por 10 Ha. El período de puesta se extiende, en general, entre primeros de marzo y primeros de Julio. Cada pareja construye una media de 3.1 (rango 2-4) nidos, aunque tres es el máximo si todos tienen éxito. El tamaño medio de puesta es de 4.0 huevos en febrero-marzo, 4.5 en abril-mayo, y 3.8 en junio-julio, siendo significativa la diferencia entre los dos últimos períodos. El período medio de incubación fue de 13.3 días, y los pollos permanecieron en el nido una media de 13.9 días. El éxito reproductor * Departamento de Ecología. Universidad de Valencia. 5(producción de pollos en función del número de huevos) decrece significativamente al avanzar la estación, desde un 80% en febrero-marzo hasta un 19% en junio-julio. Durante febreromarzo no muere ningún pollo por inanición, pero la mortaliadad por esta causa afecta a un tercio de los pollos el resto'de la estación. La predación es más alta durante junio-julio. Las parejas con 3-4 puestas producen una media de 6.7 (rango 0-10) pollos por año. Del 59% de los nidos vuela, al menos, un pollo.El inicio de la estación reproductora y el tamaño de puesta del jilguero en Sagunto están de acuerdo con la tendencia de empezar la nidificación antes y reducir el tamaño de puesta al disminuir la latitud. Sin embargo, el patrón estacional de mortalidad en el nido es opuesto al des...

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Population changes and breeding ecology of the Cirl BuntingEmberiza cirlusin eastern Spain

Ponz¹,

Barba²,

Gil‐Delgado³

1996

Bird Study

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El verderón común (Carduelis chloris): población nidificante, tamaño de la puesta y éxito reproductor. Un ejemplo de estudios a largo plazo

Cited by 8 publications

References 15 publications

Seasonal clutch size variation of multi‐brooded bird species: comparisons between breeding season and latitudes

Seasonal clutch size variation of multi‐brooded bird species: comparisons between breeding season and latitudes

Breeding success of the goldfinch Carduelis carduelis in orange plantations: the effect of predation and starvation

Population changes and breeding ecology of the Cirl BuntingEmberiza cirlusin eastern Spain

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