Brood defence in the great tit (Parus major): the influence of life-history and habitat

Curio, Eberhard; Regelmann, Klaus; Zimmermann, Uwe

doi:10.1007/bf00310991

Cited by 40 publications

(14 citation statements)

References 21 publications

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“…A very similar tendency was found with the peak rate of calling (not depicted here). As was found with brood defense against an owl (Curio et al 1984(Curio et al , 1985Regelmann and Curio 1983), males defended the brood significantly more strongly than did females, as reflected by all variables examined (Figs. 3, 4).…”

Section: Quantitative Resultsmentioning

confidence: 74%

“…This was either due to the disturbances of pairs during first brood experiments in 1989 or to the low quality of second broods (see Methods). In extended analyses of brood defense against an owl, there had been no difference in response strength between first and second broods (Curio et al 1985). To ascribe the difference between first/second brood parents to the difference between years is rendered less convincing; previous analyses of brood defense against an owl have shown but slight and non-consistent differences between years (Regelmann and Curio 1983).…”

Section: Support For the "Brood Value Hypothesis"mentioning

confidence: 90%

“…The value of a brood for the parents increases continually as the offspring are aging and thereby overcoming mortality. This increase in brood value happens either in absolute terms (Barash 1975;Curio et al 1984Curio et al , 1985 or in relation to the "reproductive value" of the parents (Andersson et al 1980). Brood value has been operationally defined as reproductive value of the offspring; it cannot be measured, but given a species' demography, it can be computed.…”

Section: Two Functional Explanations and Their Premisesmentioning

confidence: 99%

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Brood defense and age of young: a test of the vulnerability hypothesis

Onnebrink

Curio

1991

Behav Ecol Sociobiol

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Section: Quantitative Resultsmentioning

confidence: 74%

Section: Support For the "Brood Value Hypothesis"mentioning

confidence: 90%

Section: Two Functional Explanations and Their Premisesmentioning

confidence: 99%

See 1 more Smart Citation

Brood defense and age of young: a test of the vulnerability hypothesis

Onnebrink

Curio

1991

Behav Ecol Sociobiol

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“…In this sense offspring become more valuable as they grow older, so that the benefits of defending them increase. (See also Knight and Temple, 1986, for a review; also Coleman et al, 1985;Curio et al, 1985;McLean et al, 1986;Curio, 1987;Kiipi, 1987;Breitwisch, 1988.) The second conclusion above implies that young parents will employ more conservative defense strategies than older parents, at least if future reproductive value R(a) decreases with age.…”

Section: A = (25) N(a)mentioning

confidence: 94%

The risks of parenthood. I. General theory and applications

Clark

Ydenberg

1990

Evol Ecol

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SummaryWe use contemporary life history theory to analyze parental decisions concerned with the defense of offspring, and with the provisioning of offspring in the presence of risk. In achieving the optimal level of parental investment, the parent faces a tradeoff between present and future reproductive success. Our models, which are based on stochastic dynamic programming, lead to predictions of the following kind: (i) offspring will be defended more vigorously as they grow older; (ii) long-lived species will accept fewer risks in caring for offspring than short-lived species; (iii) parents living in permanently riskier environments will defend their offspring more vigorously than parents in less risky environments; (iv) however, temporary increases in risk will result in temporarily less vigorous defense and provisioning of offspring. The models also show that parents and their offspring have different conceptions of the optimal level of parental investment. The flexibility of our modeling approach as a method of analyzing facu]tative behavior is also emphasized. Finally, we apply the methods of this paper to analyze fledging behavior of Atlantic puffins.

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“…Although parents can enhance the investment in offspring by increasing the intensity of nest defense over the breeding period (Redondo, 1989;Caro, 2005), nest defense behavior may vary among species and depending on offspring age (Curio et al, 1985;Montgomerie and Wheatherhead, 1988;Redondo, 1989), probability of parents' survival/renesting (Pavel and (Redondo, 1989;Brunton, 1990), age linking residual reproductive value (Takata et al, 2016) and conditions of broods (Pavel and Bureš, 2001). …”

Section: Introductionmentioning

confidence: 99%

The Relationship Between Parental Defense Intensity and Nest Site Characteristics in Eurasian Magpie (Pica Pica L.) - An Assessment With the Classification Methods

Kirazlı¹

2017

Appl Ecol Env Res

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Abstract. Nest defense behavior varies among species and depends on different factors. However little is known of the influence of urbanization and nest characteristics on the nest defense intensity as parental investment of the bird species. We observe the Eurasian magpie Pica pica nests to evaluate their nest defense behavior among those factors including urbanization degree of habitat, and nest characteristics such as nest volume, presence/absence of roof, offspring size and the number of offspring reduction for each breeding stages (incubation, early brooding and post brooding stage). To investigate the relationship between the nest defense behavior of Eurasian magpie and a set of those factors we used classification trees, binary logistic regression and random forest. According to our results nest defense strategies can be temporally changed primarily according to the nest volume with the auxiliary agents mostly a reduction of offspring number, which indicates parental capacities and offspring conditions could shape strongly their own nest defense strategies. Besides, we recommend classification trees, binary logistic regression and random forest modeling approaches to be considered individually or together for predictive mapping for ecosystem scientists.

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Brood defence in the great tit (Parus major): the influence of life-history and habitat

Cited by 40 publications

References 21 publications

Brood defense and age of young: a test of the vulnerability hypothesis

Brood defense and age of young: a test of the vulnerability hypothesis

The risks of parenthood. I. General theory and applications

The Relationship Between Parental Defense Intensity and Nest Site Characteristics in Eurasian Magpie (Pica Pica L.) - An Assessment With the Classification Methods

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