Parental body condition and high energy value of fish determine nestling success in Magellanic penguin (Spheniscus magellanicus)

Barrionuevo, Melina; Ciancio, Javier; Marchisio, Nahuel; Frere, Esteban

doi:10.1007/s00227-018-3358-3

Cited by 14 publications

(15 citation statements)

References 95 publications

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“…A Magellanic penguin chick's access to resources will depend on a range of interacting factors, including hatch order, parental quality and preferences, nest type and cover, and oceanographic conditions (e.g., Barrionuevo et al, 2018;Boersma, 1992;Boersma et al, 2013;Frere et al, 1992;Stokes & Boersma, 1998). Food availability and predictability for penguins breeding at Punta Tombo vary across temporal scales.…”

Section: Introductionmentioning

confidence: 99%

Feet first: Adaptive growth in magellanic penguin chicks

Gownaris

Boersma

2021

Ecology and Evolution

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Section: Introductionmentioning

confidence: 99%

Feet first: Adaptive growth in magellanic penguin chicks

Gownaris

Boersma

2021

Ecology and Evolution

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“…; Barrionuevo et al. ) in oscillating clupeid–engraulid systems such as in Japan, Peru, Chile, or the California Current (Chavez et al. ; Takasuka et al.…”

Section: Discussionmentioning

confidence: 99%

“…The difference in bony part proportion, and hence in energy content, between these two families could have direct implications on predator's population dynamics (Wanless et al 2005;Barrionuevo et al 2018) in oscillating clupeid-engraulid systems such as in Japan, Peru, Chile, or the California Current (Chavez et al 2003;Takasuka et al 2007) or where they are spatially segregated, as is the case of the Patagonian Continental Shelf (Sánchez et al 1995;Wilson et al 2005). Future studies that include ash content in relation to species and fish size would greatly improve the energy density estimations for these fishes.…”

Section: Discussionmentioning

confidence: 99%

Energy Density Predictors for Argentine Anchovy Engraulis anchoita, a Key Species of the Southwestern Atlantic Ocean

et al. 2020

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Forage fishes have a cosmopolitan distribution and constitute key species in marine trophic webs throughout the world. We estimated the energy density of the Argentine Anchovy Engraulis anchoita, a key component of the base of the food web in a large fraction of the southwestern Atlantic Ocean. We also examined the relationships between energy density and different proxies (condition factor, fork length, and percent dry weight) and compared the relationship of energy density to percent dry weight for Argentine Anchovy to this relationship in other forage fishes. A regression model that includes percent dry weight and fork length was the best predictor for the energy density in this species. The Argentine Anchovy had similar energy density to percent dry weight to all species in the Engraulidae family (anchovies) and to most of the species in the Clupeidae family (sardines). Engraulidae species showed smaller mean energy density and smaller energy density to percent dry weight compared with the Clupeidae species. The difference in energy density between these two families could have direct implications on population dynamics of predators in oscillating sardine–anchovy systems or in regions where these two families are spatially segregated.

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“…Chicks fledge at ~70 days of age, and suffer from facultative brood reduction, with the main cause of chick death in most colonies being starvation due to food scarcity (Boersma et al 1990, 2015, Frere et al 1998). However, the proportion of high/low quality prey in the diet is also important for nestling survival and growth (Barrionuevo et al 2018). Chick diet is based on fish and squid (Frere et al 1996).…”

Section: Methodsmentioning

confidence: 99%

“…In agreement with this, the size asymmetry between siblings of Magellanic penguins is an important determinant of which chick is fed, since the largest chick receives more food (Blanco et al 1996). Moreover, it has been shown that a chick's condition, and not its survival, is correlated with its parents' condition, especially that of the father (Barrionuevo et al 2018). However, this last study could not disentangle whether the effect of parents was directly on chicks via food provisioning or indirectly via larger eggs when body condition was better (Cunningham and Russell 2000), which may also influence chick growth.…”

Section: Introductionmentioning

confidence: 99%

Compensatory effect of egg size dimorphism on hatching asynchrony in Magellanic penguin

Marchisio

Barrionuevo

Frere

2021

Journal of Avian Biology

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Egg laying is one of the most important phases in a female bird's breeding cycle. Its cost is high because eggs contain all the resources needed for the development of an embryo. Variation in size and quality of eggs can have important long-term consequences for offspring survival. Hatching asynchrony is known to influence sibling competition in many bird species. Last-hatched chicks will have a competitive disadvantage throughout the pre-fledgling period because they are smaller. The aim of this study was to analyze the effect of hatching asynchrony and egg size variation on the growth and fledging success of Magellanic penguin Spheniscus magellanicus chicks after disentangling the effects of parental condition. We simultaneously manipulated egg size dimorphism, hatching asynchrony and parental condition by performing a cross-fostering experiment, creating broods with controlled egg size dimorphism and hatching asynchrony in a colony of Magellanic penguins located in Isla Quiroga, Santa Cruz, Argentina. We found that hatching asynchrony had a negative effect on lasthatched chicks, but this disadvantage was mitigated by egg size dimorphism in their favor. Moreover, females in good condition invest more in second than in first chicks, which, added to a greater investment by foster fathers, leading to offspring fledging in good condition. On the contrary, for the first-hatched chicks, we found that body condition of the biological father was an important factor for their growth. We conclude that raising more than one chick seems to be a decision based on parental condition throughout the breeding season.

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Parental body condition and high energy value of fish determine nestling success in Magellanic penguin (Spheniscus magellanicus)

Cited by 14 publications

References 95 publications

Feet first: Adaptive growth in magellanic penguin chicks

Feet first: Adaptive growth in magellanic penguin chicks

Energy Density Predictors for Argentine Anchovy Engraulis anchoita, a Key Species of the Southwestern Atlantic Ocean

Compensatory effect of egg size dimorphism on hatching asynchrony in Magellanic penguin

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