The behavioural ecology of epibenthic scavenging invertebrates in the Clyde Sea area: laboratory experiments on attractions to bait in static water

Nickell, Thom; Moore, P. G.

doi:10.1016/0022-0981(92)90247-8

Cited by 25 publications

(20 citation statements)

References 19 publications

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“…Slow moving Asterias rubens and Buccinum undatum were among the last species to arrive at the discard bait (Ramsay et al 1997). Similar to the findings of Nickell & Moore (1991), no clear seasonal trends in Clyde Sea creel catches were observed for most of the species in our study. The predominant megafaunal scavenger species attracted to invertebrate discards concur with reports from the Irish and North Seas (Kaiser & Spencer 1994, Ramsay et al 1997, Groenewold & Fonds 2000 although higher numbers and a greater diversity of fish were recorded in those studies.…”

Section: Succession Of Benthic Scavengerssupporting

confidence: 80%

“…Concurring with Hancock (1963), B. undatum counts showed something of a seasonal trend peaking in April and June. Similarly, in the Clyde Sea, creel catches increased after the breeding season in February (Nickell & Moore 1991) when animals presumably resumed feeding.…”

Section: Creelsmentioning

confidence: 99%

“…Two fleets of 30 standard Nephrops creels (mesh size 18 mm) each containing 1 baited funnel trap (Fig. 2) (see Nickell & Moore 1991, Moore & Wong 1995b were deployed bimonthly between October 1998 and August 1999 in the Fairlie Channel off Clashfarland Point (ca. 55°45Ј N, 04°53Ј W), Isle of Cumbrae, on a muddy bottom.…”

Section: Methodsmentioning

confidence: 99%

“…While previous work has highlighted the ecological importance of several facultative and obligate scavenger species in the Clyde Sea area (Nickell & Moore 1991, Moore & Wong 1995a,b, Wong & Moore 1995, no inference has been made regarding the ecological effects of the increased availability of carrion, i.e. energy subsidies, due to local trawling and discarding practices.…”

Section: Introductionmentioning

confidence: 99%

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Utilisation of invertebrates discarded from the Nephrops fishery by variously selective benthic scavengers in the west of Scotland

Bergmann

Wieczorek²,

Moore³

et al. 2002

Mar. Ecol. Prog. Ser.

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Demersal trawl fisheries generate large quantities of discards which temporarily increase the amount of carrion available to benthic communities and lead to a faster energetic turnover. This study examines the availability of discarded material to the benthos, assesses consumption times of different items and identifies scavengers attracted to those invertebrates most frequently discarded from Clyde Sea Nephrops trawlers. In field and laboratory trials, heavy-shelled dead whelks (Buccinum undatum, Neptunea antiqua) sank faster than softer-bodied species like cephalopods (Allotheuthis subulata, Rossia macrosoma) or echinoderms (Ophiura ophiura, Asterias rubens), making most discards available to the benthos (at ca. -60 m CD [chart datum]) within minutes after discarding. SCUBA and time-lapse camera observations in the Clyde Sea and Loch Sween indicated bait utilisation times between 24 and 48 h. Fast-moving animals like brachyuran crabs were the first to arrive at discard bait piles whose composition mimicked typical discards from the Clyde Sea Nephrops fishery. Bimonthly deployments of traps baited with invertebrate discards in the north of the Clyde Sea showed that A. rubens, followed by Pagurus bernhardus, Liocarcinus depurator and whelks, were the most abundant megafaunal scavengers. Fine-meshed funnel traps deployed inside those creels yielded up to 2819 amphipods per trap, with Scopelocheirus hopei and Orchomene nanus accounting for most of the catch. Together with whelks, A. rubens and Carcinus maenas, O. nanus showed a clear preference for crustacean bait. By contrast, Pagurus bernhardus was more attracted to A. rubens and, in 1 trial, to O. ophiura bait. Traps deployed in the south of the Clyde Sea yielded generally lower numbers and species diversity in the catch, with Nephrops being the most abundant megafaunal scavenger. It showed a preference for L. depurator and conspecific bait. While the results show that a range of epibenthic species readily utilise invertebrates discarded from Clyde Sea Nephrops trawlers, it is unknown to what extent discards subsidise benthic communities as information on the ecological energetics of the species involved locally is currently lacking. KEY WORDS: Carrion · Discards · Nephrops norvegicus · Scavengers · Trawling · ScotlandResale or republication not permitted without written consent of the publisher

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Section: Succession Of Benthic Scavengerssupporting

confidence: 80%

Section: Creelsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Utilisation of invertebrates discarded from the Nephrops fishery by variously selective benthic scavengers in the west of Scotland

Bergmann

Wieczorek²,

Moore³

et al. 2002

Mar. Ecol. Prog. Ser.

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show abstract

“…Both S. hopei and N. (C.) borealis were reported to be important scavengers in the Clyde Sea (Nickell & Moore 1991), the North Sea , and the Mediterranean (Bozzano & Sardá 2002). S. hopei, along with other amphipod and isopod species, was attracted to baited traps in the Irish Sea (Ramsay et al 1997) and together with another lyassianidae amphipod, Orochomene manus, was an important scavenger in west Scotland (Bergmann et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Fate of discards from deep water crustacean trawl fishery off the south coast of Portugal

Castro¹,

Araújo

Monteiro

2005

New Zealand Journal of Marine and Freshwater Research

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Trawling for crustaceans takes place on the south coast of Portugal at depths between 200 and 800 m. Large amounts of discards are released back to sea, reaching the bottom in the general area where trawling occurs. The objective of this work was to study the time taken for decomposition of the discards, to identify the most important scavenging species involved, and to evaluate the impact on the species targeted by the fishery. We conducted a series of 22 trials, using traps baited with samples of the discards. The time of immersion varied between 1 and 40 h. The amount of tissue removed from the discards was evaluated on a qualitative scale of 1-3, and quantitatively. The species caught in the traps were identified. Considerable consumption of the bait had occurred after 5 h of immersion. After 24 h of immersion only fish bones were left; past 40 h, consumption was complete. The conger eel (Conger conger) was the most common fish species present in the traps. Two species, the amphipod Scopelocheirus hopei and the isopod Natatolana (Cirolana) borealis, were identified as most important for the recycling of organic matter in the system. The stomach contents of a sample of species caught in trawls were analysed for the presence of small scavengers. Preliminary results show that S. hopei and N. (C.) borealis are part of the diet of some of the target species of this fishery, such as the Norway lobster, Nephrops norvegicus and the rose shrimp Parapenaeus longirostris.

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Epibenthic predators control mobile macrofauna associated with a foundation species in a subarctic subtidal community

Yakovis

Artemieva

2019

Ecology and Evolution

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Foundation species (FS) are strong facilitators providing habitat for numerous dependent organisms. The communities shaped by FS are commonly structured by interplay of facilitation and consumer control. Predators or grazers often indirectly determine community structure eliminating either FS or their principal competitors. Alternatively, they can prey on the dependent taxa directly, which is generally buffered by FS via forming complex habitats with numerous refuges. The latter case has been never investigated at high latitudes, where consumer control is widely considered weak. We manipulated the presence of common epibenthic crustacean predators to assess their effect on mobile macrofauna of the clusters developed by a FS (barnacle Balanus crenatus and its empty tests) in the White Sea shallow subtidal (65° N). While predation pressure on the FS itself here is low, the direct effects of a spider crab Hyas araneus and a shrimp Spirontocaris phippsii on the associated assemblages were unexpectedly strong. Removing the predators did not change species diversity, but tripled total abundance and altered multivariate community structure specifically increasing the numbers of amphipods, isopods (only affected by shrimp), and bivalves. Consumer control in the communities shaped by FS may not strictly follow the latitudinal predation gradient rule.

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The behavioural ecology of epibenthic scavenging invertebrates in the Clyde Sea area: laboratory experiments on attractions to bait in static water

Cited by 25 publications

References 19 publications

Utilisation of invertebrates discarded from the Nephrops fishery by variously selective benthic scavengers in the west of Scotland

Utilisation of invertebrates discarded from the Nephrops fishery by variously selective benthic scavengers in the west of Scotland

Fate of discards from deep water crustacean trawl fishery off the south coast of Portugal

Epibenthic predators control mobile macrofauna associated with a foundation species in a subarctic subtidal community

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