Seasonal swimming behaviour in the queen scallop (Aequipecten opercularis) and its effect on dredge fisheries

Jenkins, Stuart R.; Lart, William; Vause, Belinda J.; Brand, A. R.

doi:10.1016/s0022-0981(03)00050-9

Cited by 21 publications

(13 citation statements)

References 17 publications

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“…Moreover, other variables also influence CPUE. Temperature has a substantial influence on catches of queen scallops Aequipecten opercularis, due to their temperature-dependent escape response (Jenkins et al 2003). However, Jenkins & Brand (2001) found no significant effect of season on the number of valve adductions in Pecten maximus following simulated fishing, and there was no clear impact of temperature in the present study.…”

Section: Discussioncontrasting

confidence: 74%

Functional response of fishers in the Isle of Man scallop fishery

Murray

Hinz

Kaiser

2011

Mar. Ecol. Prog. Ser.

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To implement effective fisheries management, it is important to understand the variables influencing the distribution and intensity of fishing effort. The functional response of consumers to the availability of prey determines their impact on prey populations. The relationship between predator and prey observed in nature also applies to fishers and the populations they target. The present study focuses on the behaviour of a scallop dredging fleet fishing for Pecten maximus around the Isle of Man during a single fishing season. The functional response was investigated by examining the relationships between catches and fishing effort, scallop abundance and other variables. Scallop abundance was depleted rapidly during the first month of fishing. The increased patchiness of scallops towards the end of the season probably reduced their catchability, but fishers were able to maintain catch rates at intermediate abundance levels. The functional response did not conform to a particular type, but there was latent fishing capacity in the fishing fleet even at the highest levels of abundance. Therefore, reducing the number of vessels would not necessarily reduce fishing mortality unless combined with a reduction in the fishing power of individual vessels.

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Section: Discussioncontrasting

confidence: 74%

Functional response of fishers in the Isle of Man scallop fishery

Murray

Hinz

Kaiser

2011

Mar. Ecol. Prog. Ser.

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“…Animals were fed twice a week with life plankton (DT's Live Marine Phytoplankton ® , Sycamore, IL, USA). Individuals were be grouped in two classes: small animals from 40-55 mm (below marketable size) (Jenkins et al, 2003) and bigger animals from 65-75 mm shell height. Age was determined with the von Bertalanffy growth function (VBGF) of Philipp et al (Philipp et al, 2006) obtained for A. opercularis from the same sampling station.…”

Section: Sampling and Maintenancementioning

confidence: 99%

Size- and age-dependent changes in adductor muscle swimming physiology of the scallopAequipecten opercularis

Philipp

Schmidt

Gsottbauer

et al. 2008

Journal of Experimental Biology

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SUMMARYThe decline of cellular and especially mitochondrial functions with age is, among other causes, held responsible for a decrease in physiological fitness and exercise capacity during lifetime. We investigated size-and age-related changes in the physiology of exercising specimens of the short lived swimming scallop Aequipecten opercularis (maximum life span 8 to 10 years) from the Isle of Man, UK. A. opercularis swim mainly to avoid predators, and a decrease in swimming abilities would increase the risk of capture and lower the rates of survival. Bigger (older) individuals were found to have lower mitochondrial volume density and aerobic capacities (citrate synthase activity and adenylates) as well as less anaerobic capacity deduced from the amount of glycogen stored in muscle tissue. Changes in redox potential, tissue pH and the loss of glutathione in the swimming muscle during the exercise were more pronounced in young compared to older individuals. This indicates that older individuals can more effectively stabilize cellular homeostasis during repeated exercise than younger animals but with a possible fitness cost as the change in physiology with age and size might result in a changed escape response behaviour towards predators. Supplementary material available online at

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“…Aequipecten opercularis individuals were kept in flow-through aquaria at Â108C (mean in-situ temperature) and 34 PSU for 2 weeks prior to experimentation and fed live plankton twice a week (DT's Live Marine Phytoplankton † ). Individuals grouped in two size classes: small animals from 39 to 58 mm and thus below marketable size (Jenkins et al 2003) and bigger animals from 63 to 77mm shell height. Age was determined from shell size, using the von Bertalanffy growth function (VBGF) of Philipp et al (2006) based on animals of the same sampling location.…”

Section: Sampling and Maintenancementioning

confidence: 99%

“…Twenty-four hours before the experiment, a Teflon nut was glued to the lower shell of each individual using plastic glue (Artisil Adeseal, Innotec Dtld.G.Pannenbecker KG) as described in Jenkins et al (2003). A Teflon screw was fixed in the experimental setup aquarium in a constant temperature (cT) room at a 108C.…”

Section: Swimming Experimentsmentioning

confidence: 99%

“…The question arises whether these changes are already sufficient to lead to impaired physiological function in bigger, older animals compared to smaller, younger animals. In general it is observed in scallops that large individuals swim less readily and often (Jenkins et al 2003; for review see Brand 1991). Thus, although swimming behaviour of scallops has been thoroughly investigated (Grieshaber 1978;Thompson et al 1980;Chih & Ellington 1983;Bailey et al 2003) the important question as to whether or not swimming activity and physiological fitness change with size and age have not been resolved.…”

Section: Introductionmentioning

confidence: 99%

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Size and age-dependent changes of escape response to predator attack in the Queen scallopAequipecten opercularis

Schmidt

Philipp

Abele

2008

Marine Biology Research

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To cite this Article Schmidt, Maike, Philipp, Eva E. R. and Abele, Doris(2008)'Size and age-dependent changes of escape response to predator attack in the Queen scallop Aequipecten opercularis ',Marine Biology Research,4:6,[442][443][444][445][446][447][448][449][450] To link to this Article: DOI: 10.1080/17451000802270346 URL: http://dx.doi.org/10.1080/17451000802270346Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden.The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. ORIGINAL ARTICLESize and age-dependent changes of escape response to predator attack in the Queen scallop Aequipecten opercularis MAIKE SCHMIDT, EVA E. R. PHILIPP* & DORIS ABELE* Alfred-Wegener-Institute for Polar and Marine Research, Department of Biosciences, Shelf Sea Ecology, Bremerhaven, Germany Abstract Physiological fitness and exercise capacity decrease with age in humans and rodents, a finding for which, among other causes, the decline of cellular and especially mitochondrial functions with age is held responsible. We investigated changes of escape response to predator attacks in swimming scallops (Aequipecten opercularis) with size using the natural predator Asterias rubens. Aequipecten opercularis swim mainly to avoid predators and a decrease in swimming abilities would increase risk of capture and lower survival. The queen scallop A. opercularis is a very active, epibenthic species with a short lifespan of 8Á10 years and a shell height up to 90 mm in the investigated fishing ground around the Isle of Man. No difference in clap rate was found between smaller and bigger A. opercularis individuals, but differences were found in swimming mode (jumping and swimming) and valve opening and closure behaviour between the two size groups in response to predator attack. Smaller individuals showed less jumping movements and closed valves more often and remained closed for longer time than bigger animals. The difference in swimming behaviour is discussed in respect to size and age-dependent changes in morphology and cellular physiology as well as interactions of different main predators (sea stars, crabs) with the different size classes.

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Seasonal swimming behaviour in the queen scallop (Aequipecten opercularis) and its effect on dredge fisheries

Cited by 21 publications

References 17 publications

Functional response of fishers in the Isle of Man scallop fishery

Functional response of fishers in the Isle of Man scallop fishery

Size- and age-dependent changes in adductor muscle swimming physiology of the scallopAequipecten opercularis

Size and age-dependent changes of escape response to predator attack in the Queen scallopAequipecten opercularis

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