The influence of size on striped bass foraging

Hartman, Kyle J.

doi:10.3354/meps194263

Cited by 21 publications

(21 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3). The relative predator length is frequently used when describing predator and prey relations in size-structured populations (e.g., Scharf et al 1998, Hartman 2000. Our data suggest it is legitimate to assume that the parameters are independent on predator size if corrected for prey size for the size combinations used in our experiments.…”

Section: Model Descriptionmentioning

confidence: 78%

Foraging Capacity and Resource Synchronization in an Ontogenetic Diet Switcher, Pikeperch (Stizostedion Lucioperca)

Persson

Brönmark

2002

Ecology

View full text Add to dashboard Cite

Foraging capacity and resource synchronization in an ontogenetic diet switcher, pikeperch (Stizostedion lucioperca)Persson, Anders; Brönmark, Christer Link to publication Citation for published version (APA): Persson, A., & Brönmark, C. (2002). Foraging capacity and resource synchronization in an ontogenetic diet switcher, pikeperch (Stizostedion lucioperca). Ecology, 83(11), 3014-3022.General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal Abstract. Species undergoing ontogenetic diet shifts face a risk of resource competition that delays transitions between feeding stages. Such ontogenetic bottlenecks are common in piscivorous fish because competition with future prey may retard growth and prevent a size advantage. In pikeperch (Stizostedion lucioperca), year class strength of 0ϩ cohorts is highly variable and positively related to early onset of piscivory. To identify the causes of this pattern, we experimentally quantified size-dependent planktivorous and piscivorous foraging capacity and incorporated the data into a growth model. For any given prey type and size, foraging capacity described a hump-shaped relationship with predator size. Foraging capacity on daphnids peaked at a pikeperch length of 66 mm, suggesting a narrow scope of planktivory. The highest capacity in the piscivorous niche was reached at a predator-to-prey length ratio of 5, where the ratio was an integrated measure of predator size over several prey sizes. With the growth model, we derived size distributions of 0ϩ cohorts as functions of resource levels. Simulations revealed two major determinants for the year class strength of pikeperch. First, discontinuous availability of prey sizes counteracted switching to piscivory within the first growing season. This was accentuated by prey fish growth, which caused the planktivory and piscivory niches to separate over time and limited the time window when diet shift was possible. Second, the hump-shaped relationship between size and foraging capacity resulted in growth reduction when growing out of the planktivorous niche. Switching to piscivory in our model occurred along a perpendicular relationship between fish prey and zooplankton density. Zooplankton density determined whether pikeperch reached a size advantage over prey, and fish prey density affected whether the foraging return of piscivory was higher than planktivory. Individuals not reaching a size advantage over prey and failing to become piscivorous were stunted at a size when consumption bal...

show abstract

Section: Model Descriptionmentioning

confidence: 78%

Foraging Capacity and Resource Synchronization in an Ontogenetic Diet Switcher, Pikeperch (Stizostedion Lucioperca)

Persson

Brönmark

2002

Ecology

View full text Add to dashboard Cite

show abstract

“…Popova 1978, Gleason & Bengtson 1996, Scharf et al 1997, Buckel et al 1998, Manderson et al 1999, 2000, Hartman 2000, it is often small rather than large piscivores that preferentially target small prey fish (Rice et al 1993). Additionally, a number of studies have shown that piscivores are able to consume prey that are large relative to the predator's size (Table 2).…”

Section: What Constitutes 'Shallow Water'?mentioning

confidence: 99%

Are there really few piscivorous fishes in shallow estuarine habitats?

Sheaves¹

2001

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Shallow estuarine habitats throughout the world are recognised as valuable nursery grounds for juvenile fishes. It is often suggested that this is due, at least in part, to the occurrence of low numbers of piscivorous fishes in these habitats. This idea is not confined to particular habitat types, but has been used in reference to a range of habitats, including both vegetated and unvegetated areas. I evaluate the proposition that there are few piscivorous fishes in shallow estuarine habitats, and suggest that the proposition is ill-defined, with little unequivocal supporting or contradictory evidence. To make any sense, the proposition must be evaluated relative to some other habitat, something often not addressed in previous studies. Additionally, including the full range of potentially piscivorous fishes is important if the role of predation is to be understood. Most studies have considered only large piscivorous fishes. This is unfortunate when the proposition logically relates to an advantage for small juvenile fishes. There is considerable evidence that, in addition to large piscivorous fishes, small juvenile fishes are extensively preyed upon both by juveniles of the large piscivorous species and by a range of other small species that include a large component of fish in their diets. In addition, many of the prey species may, themselves, switch opportunistically to piscivorous feeding. Not only are small piscivores numerous, but because of their size they are much more likely to access shallow waters than large piscivores. Even when the full range of piscivorous fishes are considered, it is not clear that the question of the abundance of piscivores in shallow waters should be the real focus of interest. Rather the crucial question is whether or not predator-induced mortality is reduced in shallow estuarine habitats.

show abstract

“…This is possible because many benthic predators such as crabs, naticid and muricid gastropods, and fishes are generalist feeders, consuming those prey items that yield within a certain time (e.g. Fairweather & Underwood 1983, Brown & Haight 1992, Hartman 2000, Bishop et al 2008. Among armoured species, processes that weaken shell thickness or strength may confer greater vulnerability to predation (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of estuarine acidification on predator–prey interactions

Amaral¹,

Cabral²,

Bishop³

2012

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Short-term experiments exposing calcifying organisms to acidification have revealed altered growth and strength of their exoskeletons. We tested the hypothesis that multi-generational exposure to sustained estuarine acidification from runoff from acid sulphate soils (ASS) would: (1) reduce the shell strength of sessile or relatively immobile wild benthic invertebrates and (2) as a consequence render these invertebrates that rely on armour for anti-predator defence more susceptible to generalist benthic predators. First, we compared the force required to break the exoskeletons of Saccostrea glomerata, Bembicium auratum, and Heloecius cordiformis between replicate south-east Australian mangrove forests close to (acidified) and away from (reference) major ASS outflow drains. Second, we assessed differences in the susceptibility of oysters from acidified and reference forests to predation by the generalist muricid gastropod Morula marginalba. Mollusc shells were significantly weaker at ASS-affected than at reference sites, but the strength of crab carapaces was not influenced by acidification. Oysters from acidified sites were consumed by M. marginalba at a faster rate than oysters from reference sites in choice and nochoice experiments because M. marginalba required less time to drill through weaker shells. Many other predators such as crabs are generalist feeders that consume prey at rates inversely proportional to their shell strength. Hence, in the absence of effects of acidification on the ability of these predators to consume prey, molluscs at acidified sites may also be more susceptible to other such predators. This study highlights how human stressors can rapidly alter predator-prey interactions that have evolved over many years.

show abstract

The influence of size on striped bass foraging

Cited by 21 publications

References 16 publications

Foraging Capacity and Resource Synchronization in an Ontogenetic Diet Switcher, Pikeperch (Stizostedion Lucioperca)

Foraging Capacity and Resource Synchronization in an Ontogenetic Diet Switcher, Pikeperch (Stizostedion Lucioperca)

Are there really few piscivorous fishes in shallow estuarine habitats?

Effects of estuarine acidification on predator–prey interactions

Contact Info

Product

Resources

About