Influence of spawning capelin Mallotus villosus on the distribution of green sea urchins Strongylocentrotus droebachiensis on the northeast Newfoundland coast

Crook, Kevin A.; Davoren, Gail K.

doi:10.3354/meps11699

Cited by 9 publications

(3 citation statements)

References 52 publications

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“…Traditionally, sea urchins are considered predominantly herbivores but they can consume a wide variety of animal protein and for many, an omnivorous or unambiguously carnivorous diet has been reported (Crook & Davoren 2016. Even though P. lividus appears to have a reduced ability to assimilate animal material when compared with other sea urchins like Arbacia lixula (Wangensteen et al 2011), it showed predation on EC in the laboratory experiments.…”

Section: The Feeding Biology Of Potential Predators Of Sepia Officinamentioning

confidence: 97%

Invertebrate predation on egg masses of the European cuttlefish, Sepia officinalis: An experimental approach

Martins

Fernández-Álvarez

Villanueva

2018

Estuarine, Coastal and Shelf Science

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Sepia officinalis embryos develop inside ink-stained black encapsulated eggs fixed to the seafloor in shallow water habitats. The enveloping layers of these eggs allow the embryo to develop within a micro-environment and are thought to provide protection.Since embryological development may last months, this short-lived species spends a relatively long period of its lifespan on shallow waters, vulnerable to predation and physical stress. Yet, only a handful of species are known to feed on S. officinalis eggs, most of them fish. Marine benthic invertebrates, however, are likely candidates contributing to predation of this critical life stage. In this study, several invertebrate marine species, from 6 different phyla and with diverse feeding habits, were investigated as potential predators of S. officinalis eggs under laboratory conditions.Feeding experiments also tested to what extent the egg capsule and lower levels of mechanical protection could deter predation and Multivariate Correspondence Analyses were performed to explore which feeding traits of the tested invertebrate species would explain the experimental results. Results showed predation on eggs by crabs and echinoderms equipped with certain prey capture methods that allowed them to feed on eggs. Also, the egg capsule appeared to provide protection from predation by certain species with less powerful prey capture tools. Prey capture tools of the tested species appeared to be the feeding trait that better explained the experimental results. Therefore, whether or not eggs were eaten in these experiments might be determined by a mechanical factor. Nonetheless this may not be the case for species that might not have fed on eggs due probably to a chemosensory question, not recognising them as food.This work thus contributes to the understanding of the ecology of early life stages of cuttlefish and the factors that can affect offspring survival and subsequently impact recruitment to the adult populations of this exploited species.iii ACKNOWLEDGMENTS This work might not have been possible without the support and help of many people.Many thanks to my directors, Fernando Fernández-Álvarez and Dr. Roger Villanueva, who taught me with patience and trusted me to embark on this study, while making the work truly feel like a journey of curiosity. Without their continuous guidance and encouragement this work would not have been the same.

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Section: The Feeding Biology Of Potential Predators Of Sepia Officinamentioning

confidence: 97%

Invertebrate predation on egg masses of the European cuttlefish, Sepia officinalis: An experimental approach

Martins

Fernández-Álvarez

Villanueva

2018

Estuarine, Coastal and Shelf Science

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“…A remotely operated vehicle (ROV) potentially combines the benefits of being able to maintain a consistent elevation, as well as providing a live feed to decrease entanglements across the entire urchin depth and habitat range. ROVs have been trialled elsewhere for monitoring urchin density (Crook & Davoren, 2016), but have yet to be tested in Tasmania despite this potential benefit.…”

Section: Introductionmentioning

confidence: 99%

Regional estimates of a range‐extending ecosystem engineer using stereo‐imagery from ROV transects collected with an efficient, spatially balanced design

Sward

Monk

Barrett

2021

Remote Sens Ecol Conserv

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The redistribution of marine ecosystem engineers in response to changing climate is restructuring endemic benthic communities globally. Therefore, developing and implementing efficient monitoring programs across the complete depth range of these marine ecosystem engineers is often an urgent management priority. Traditionally, many monitoring programs have been based on a systematically selected set of survey locations that, while able to track trends at those sites through time, lack inference for the overall region being monitored. This study trialled a probabilistic sampling design to address this need, taking advantage of an important prerequisite for such designs, extensive multibeam echosounder (MBES) mapping, to inform a spatially balanced sample selection. Here, we allocated 170 remotely operated vehicles (ROVs) transects based on a spatially balanced probabilistic sampling design across three locations with extensive mapping. Generalized additive models were used to estimate the density and associated barren cover of the range-expanding ecosystem engineer, the long spined urchin (Centrostephanus rodgersii). Estimates were generated at a reef-wide scale across three locations on the east coast of Tasmania, Australia, representing the leading edge of the species recent range extension. Modelbased estimates of urchin density and barren cover incorporated seabed structure attributes, such as depth and ruggedness, with differences in these modelled relationships being identified between locations. Estimates ranged from 0.000065 individuals m À2 and 0.018% barren cover in the Tasman Peninsula to 0.167 individuals m À2 and 2.10% barren cover at Governor Island Marine Reserve, reflecting a north to south distributional gradient. This study highlights the value of combining probabilistic sampling designs, ROV transects, stereo video, and MBES mapping to generate reliable and robust estimates of important ecosystem species needed to protect reef-based fishery and conservation values via adaptive and informed management.

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“…Some identified capelin egg predators include: the amphipod C. laeviusculus (DeBlois & Leggett 1991), green sea urchin Strongylocentrotus droebachiensis (Crook & Davoren 2016), capelin (Templeman 1948, Slotte et al 2006, haddock Melanogrammus aeglefinus (Saetre & Gjøsaeter 1975, Dolgov 2002, Bogetveit et al 2008, winter flounder Pseudopleuronectes ame ricanus (Frank & Leggett 1984), and the diving ducks Somateria mollissima, S. spectabilis and Clangula hyemalis (Saetre & Gjøsaeter 1975). A new potential egg predator, the invasive red king crab Paralithodes camtschaticus, entered the spawning sites of Barents Sea capelin in the 1990s (Britayev et al 2010), and has been documented to feed on capelin eggs (Anisimova et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Invasive red king crabs feed on both spawned-out capelin and their eggs

Mikkelsen¹,

Pedersen²

2017

Mar. Ecol. Prog. Ser.

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The aim of the present study was to test the hypothesis that the invasive red king crab Paralithodes camtschaticus may hamper capelin (Mallotus villosus) recruitment through egg consumption. Field studies (2005, 2006), laboratory experiments (2011), and models of consumption were applied. To explore the response of the predator to prey density, crab abundance and capelin egg density were estimated in stratified study areas. Stomach evacuation rates of capelin eggs in red king crab stomachs were investigated experimentally, and the average evacuation time estimated to be 5.38 h at 2.9°C. The average evacuation time was applied to a consumption model where uncertainty in input values was assessed by Monte Carlo simulation. Estimated egg consumption values were 0.04% and 2.23% of the total number of eggs in studied spawning areas, in 2005 and 2006, respectively. The high variability in quantity of eggs in stomachs generated most of the uncertainty in consumption estimates. Red king crabs did not show an aggregative response to capelin egg density, nor was the magnitude of egg consumption correlated with egg density. Dead post-spawn capelin was a major and more important prey than eggs for red king crab. Our findings imply that semelparity in Barents Sea capelin may lead to predator swamping, thereby reducing capelin egg consumption by the invasive red king crab.

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Influence of spawning capelin Mallotus villosus on the distribution of green sea urchins Strongylocentrotus droebachiensis on the northeast Newfoundland coast

Cited by 9 publications

References 52 publications

Invertebrate predation on egg masses of the European cuttlefish, Sepia officinalis: An experimental approach

Invertebrate predation on egg masses of the European cuttlefish, Sepia officinalis: An experimental approach

Regional estimates of a range‐extending ecosystem engineer using stereo‐imagery from ROV transects collected with an efficient, spatially balanced design

Invasive red king crabs feed on both spawned-out capelin and their eggs

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