Prey selection and foraging behavior of the whelk Rapana venosa

Hu, Nan; Wang, Fang; Zhang, Tao; Song, Hao; Yu, Zhi; Liu, Dapeng

doi:10.1007/s00227-016-3006-8

Cited by 19 publications

(14 citation statements)

References 25 publications

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“…The high costs of feeding for predator species are determined mainly by the difficulties of finding, handling, attacking and ingesting the prey [ 11 , 35 , 36 ]. These tasks may be particularly energetically expensive if the prey are not abundant and/or if they possess defense structures such as the shells of bivalves [ 10 ].…”

Section: Discussionmentioning

confidence: 99%

“…Non-specific predators commonly consume organisms that differ in size, shape, soft tissues content, and the hardness and thickness of protective structures; thus, one or more of these parameters may define the selection of one prey over another. This is probably related to a net balance between the energetic costs of attack and the energetic income from consuming a particular prey [ 6 , 7 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…During feeding by some predator species, it is hard to distinguish between one phase and a following phase, as the feeding activity appears as a single, continuous process [ 15 ]. Nonetheless, the increment of feeding costs is sustainable and represents a benefit for the predator when total feeding costs (all phases added together) are minor compared with the energetic incomes obtained from the consumed prey [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

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Energetic trade-offs: Implications for selection between two bivalve prey species by a carnivorous muricid gastropod

Averbuj

et al. 2021

PLoS ONE

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Active predators obtain energy and nutrients from prey through complex processes in which the energy gained must exceed the energy invested in finding and ingesting the prey. In addition, the amount of energy available will vary with the prey that are selected for consumption. The muricid gastropod Acanthina monodon inhabits rocky shores, where it routinely feeds on the mytilids Semimytilus algosus and Perumytilus purpuratus. In this study, S. algosus was highly preferred by the predator (over 90% were eaten) versus P. purpuratus (only 9% were eaten) when offered a mixed diet. The energetic cost of attacking one S. algosus individual was 91 J bivalve-1 while for P. purpuratus it was slightly higher: 95 J bivalve-1. Also, whereas A. monodon required on average 19 h to consume S. algosus, successful attacks on P. purpuratus required about 32% more time (25 h). In addition, a longer resting time was needed by the predator after preying on P. purpuratus before it initiated another attack. Moreover, the active metabolic costs associated with successfully attacking the prey increased 3.2 times over the basal metabolic costs when attacking S. algosus, but only by 2.5 times when attacking P. purpuratus. The calculations associated with preying on each species showed that the energetic gain per unit time likely accounts for the predator’s preference for attacking S. algosus, even though predation on both species provided net energy gains for the predator. However, as S. algosus occurs seasonally at our study site, P. purpuratus would probably also be consumed due to its constant availability throughout the whole year.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energetic trade-offs: Implications for selection between two bivalve prey species by a carnivorous muricid gastropod

Averbuj

et al. 2021

PLoS ONE

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“…Savini & Occhipinti-Ambrogi, 2006;Das, Chattopadhyay, & Chattopadhyay, 2015;Hu et al, 2016), as well as other benthic predatory organisms such as sea stars (e.g. Güler & Lök, 2015) and so on.…”

Section: Introductionmentioning

confidence: 99%

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Güler¹,

Lök²

2019

Turk. J. Fish. Aquat. Sci.

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The behavior of a group of predators may have effects which cannot be predicted using data from a solitarily observed predator however in many experimental studies on the aspects of predation, one predator at a time have been examined. In the present study consumption rates of H. trunculus were tested with experimental setups that allow communal feeding, and some reassessments were attempted to be made on the foraging capabilities of this species, which can be used in ecology and aquaculture studies alike. Furthermore, the influence of predator hunger level was evaluated in an auxiliary experiment. Experiments were designed as two equal periods. The prey species Mytilus galloprovincialis were offered to the snails in four size groups. Consumption rates of H. trunculus were found to be highly consistent between the first and the second period and were about 0.09 mussel snail -1 day -1 ; higher than previous reports. In the hunger level experiment which had a shorter experimental duration, consumption rates were quite high in the beginning and were decreased drastically after the first period as expected. Consumed prey sizes did not differ between main and hunger level experiments; therefore, snails did not make a particular size selection caused by their hunger level.

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“…As an invader, R. venosa populations that have rapidly spread outside their natural range have caused negative impacts on native ecosystems and natural resource loss, especially for bivalves. R. venosa possesses strong abilities of predation and digestion and feeds mainly on bivalves (Hu et al., ), so its invasion mechanism may be closely related to its ingestion and digestion. Although it has been colonizing aquatic ecosystems as an invader, R. venosa is being considered as a potential candidate for molluscan aquaculture in China.…”

Section: Introductionmentioning

confidence: 99%

The responses of digestive enzymes in juvenile and adultRapana venosa(Valenciennes, 1846) to different temperatures

Yang

Song

et al. 2019

Aquac Res

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The veined rapa whelk, Rapana venosa (Valenciennes, 1846), is an important and valuable fishery species; however, it has not been routinely artificially cultured on a large scale. Here, we studied the effect of temperature (6, 16, 22 and 28°C) on the digestive enzymes in R. venosa of different sizes (Juvenile (small, S: 1.2–1.8 cm) and adult (medium, M: 4.1–5.2 cm; large, L: 7.6–8.9 cm)) by detected the enzyme activity in different digestive glands (the salivary gland, Leiblein's gland (oesophageal gland) and liver) using spectrophotometric method, to determine the optimal temperature for artificial cultivation and to explore the feeding habits of this whelk. The optimal temperature was determined to be approximately 22°C. The food intake was significantly higher at 22°C than at other temperatures, and the activity of the digestive enzyme, trypsin, was at the highest in the main digestive gland of R. venosa, the liver, at 22°C. In addition, the observed presence of cellulase and α‐amylase may suggest that carbohydrates are necessary during R. venosa development. The results of this study will help in the formulation of technical procedures for R. venosa aquaculture and in preventing its overexploitation, and explained its invasion mechanism to some extent.

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Prey selection and foraging behavior of the whelk Rapana venosa

Cited by 19 publications

References 25 publications

Energetic trade-offs: Implications for selection between two bivalve prey species by a carnivorous muricid gastropod

Energetic trade-offs: Implications for selection between two bivalve prey species by a carnivorous muricid gastropod

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The responses of digestive enzymes in juvenile and adultRapana venosa(Valenciennes, 1846) to different temperatures

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