Collected Evidence: Collected Evidence: Limit, cease, or prohibit sediment discard during aggregate extraction We found no studies that evaluated the effects of limiting, ceasing, or prohibiting sediment discard during aggregate extraction on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2073https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2073Mon, 21 Oct 2019 14:19:53 +0100Collected Evidence: Collected Evidence: Modify the design of dredges Six studies examined the effects of modifying the design of dredges on subtidal benthic invertebrate populations. Four were in the North Atlantic Ocean (Portugal) and two were in the Irish Sea (Isle of Man).   COMMUNITY RESPONSE (1 STUDY) Unwanted catch overall composition (1 study): One replicated, controlled, study in the Irish Sea found that a new design of scallop dredge caught a similar species composition of unwanted catch to a traditional dredge. POPULATION RESPONSE (3 STUDIES) Overall abundance (2 studies): One of two controlled studies in the North Atlantic Ocean and in the Irish Sea found that a new dredge design damaged or killed fewer invertebrates left in the sediment tracks following dredging. The other found no difference in total invertebrate abundance or biomass living in or on the sediment tracks following fishing with two dredge designs. Unwanted catch overall abundance (2 studies): Two controlled studies (one replicated) in the North Atlantic Ocean and the Irish Sea found that a modified or a new design of bivalve dredge caught less unwanted catch compared to traditional unmodified dredges. Unwanted catch condition (6 studies): Six controlled studies (one replicated and paired, four replicated) in the North Atlantic Ocean and the Irish Sea found that new or modified bivalve dredges damaged or killed similar proportions of unwanted catch (retained and/or escaped) compared to traditional or unmodified designs, three of which also found that they did not reduce the proportion of damaged or dead unwanted crabs (retained and/or escaped). OTHER (1 study) Commercial catch abundance (1 study): One replicated, controlled, study in the Irish Sea found that a new dredge design caught a similar amount of commercially targeted queen scallops compared to a traditional dredge. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2119https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2119Tue, 22 Oct 2019 09:59:43 +0100Collected Evidence: Collected Evidence: Modify trawl doors to reduce sediment penetration We found no studies that evaluated the effects of modifying trawl doors to reduce sediment penetration on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2128https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2128Tue, 22 Oct 2019 10:24:53 +0100Collected Evidence: Collected Evidence: Outfit trawls with a raised footrope We found no studies that evaluated the effects of outfitting trawls with a raised footrope on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2129https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2129Tue, 22 Oct 2019 10:25:27 +0100Collected Evidence: Collected Evidence: Modify the design/attachments of a shrimp/prawn W-trawl net One study examined the effects of modifying the design/attachments of a W-trawl net used in shrimp/prawn fisheries on unwanted catch of subtidal benthic invertebrate. The study was in Moreton Bay (Australia).   COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (1 STUDY) Unwanted catch overall abundance (1 study): One replicated, paired, controlled study in Moreton Bay found that four designs of W-trawl nets used in shrimp/prawn fisheries caught less non-commercial unwanted catch of crustaceans compared to a traditional Florida Flyer trawl net. OTHERS (1 STUDY) Commercial catch abundance (1 study): One replicated, paired, controlled study in Moreton Bay found that four designs of W-trawl nets used in shrimp/prawn fisheries caught lower amounts of the commercially targeted prawn species compared to a traditional Florida Flyer trawl net. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2139https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2139Tue, 22 Oct 2019 11:00:22 +0100Collected Evidence: Collected Evidence: Modify the design of traps Two studies examined the effects of modifying the design of traps on subtidal benthic invertebrates. One study took place in the Mediterranean Sea (Spain), and one in the South Pacific Ocean (New Zealand).   COMMUNITY RESPONSE (0 STUDIES) POPULATION RESPONSE (2 STUDIES) Unwanted catch abundance (2 studies): Two replicated, controlled studies in the Mediterranean Sea and the South Pacific Ocean found that the amount of combined unwanted catch of invertebrates and fish varied with the type of trap design used and the area. OTHER (1 STUDY) Commercial catch abundance (1 study): One replicated, controlled study in the Mediterranean Sea found that plastic traps caught some legal-size commercially targeted lobsters while collapsible traps caught none. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2143https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2143Tue, 22 Oct 2019 11:11:24 +0100Collected Evidence: Collected Evidence: Modify the position of traps Two studies examined the effects of modifying the position of traps on subtidal benthic invertebrate populations. One study was in the Varangerfjord (Norway), the other in the North Atlantic Ocean (Spain).   COMMUNITY RESPONSE (1 STUDY) Unwanted catch species richness/diversity (1 study): One replicated, controlled study in the North Atlantic found that semi-floating traps caught fewer unwanted catch species compared to standard bottom traps. POPULATION RESPONSE (2 STUDIES) Unwanted catch abundance (2 studies): Two replicated, controlled studies in the Varangerfjord and the North Atlantic found that floating or semi-floating traps caught fewer unwanted invertebrates compared to standard bottom traps. OTHER (2 STUDIES) Commercial catch abundance (2 studies): Two replicated, controlled studies in the Varangerfjord and the North Atlantic found that floating or semi-floating traps caught similar amounts (abundance and biomass) of commercially targeted species as standard bottom traps. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2144https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2144Tue, 22 Oct 2019 11:14:51 +0100Collected Evidence: Collected Evidence: Modify harvest methods of macroalgae We found no studies that evaluated the effects of modifying harvest methods of macroalgae on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2151https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2151Tue, 22 Oct 2019 11:22:45 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit recreational fishing and/or harvesting We found no studies that evaluated the effects of limiting, ceasing or prohibiting recreational fishing and/or harvesting on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2154https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2154Tue, 22 Oct 2019 12:04:58 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the sale and/or transportation of commercial non-native species We found no studies that evaluated the effects of limiting, ceasing or prohibiting the sale and/or transportation of commercial non-native species on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2169https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2169Tue, 22 Oct 2019 12:18:56 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the dumping of untreated sewage We found no studies that evaluated the effects of limiting, ceasing or prohibiting the dumping of untreated sewage on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2178https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2178Tue, 22 Oct 2019 12:29:28 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the dumping of sewage sludge Two studies examined the effects of ceasing or prohibiting the dumping of sewage sludge on subtidal benthic invertebrate populations. One study was in the New York Bight (USA), one in the North Sea (UK).   COMMUNITY RESPONSE (2 STUDIES) Overall community composition (2 studies): One before-and-after, site comparison study in the New York Bight found that after ceasing sewage sludge dumping, overall invertebrate community composition became more similar to less disturbed sites. One replicated, site comparison study in the North Sea found that overall invertebrate community composition changed but remained different to that of natural sites. POPULATION RESPONSE (2 STUDIES) Overall abundance (1 study): One replicated, site comparison study in the North Sea found that after ceasing sewage sludge dumping, overall invertebrate abundance became similar to that of natural sites. Worm abundance (1 study): One before-and-after, site comparison study in the New York Bight found that after ceasing sewage sludge dumping, abundance of pollution-indicator polychaete worms decreased and became similar to that of natural sites. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2179https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2179Tue, 22 Oct 2019 12:31:08 +0100Collected Evidence: Collected Evidence: Locate aquaculture systems in already impacted areas We found no studies that evaluated the effects of locating aquaculture systems in already impacted areas on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2187https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2187Tue, 22 Oct 2019 12:56:48 +0100Collected Evidence: Collected Evidence: Locate aquaculture systems in areas with fast currents We found no studies that evaluated the effects of locating aquaculture systems in areas with fast currents on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2188https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2188Tue, 22 Oct 2019 12:57:27 +0100Collected Evidence: Collected Evidence: Locate aquaculture systems in vegetated areas We found no studies that evaluated the effects of locating aquaculture systems in vegetated locations on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2189https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2189Tue, 22 Oct 2019 12:58:02 +0100Collected Evidence: Collected Evidence: Moor aquaculture cages so they move in response to changing current direction We found no studies that evaluated the effects of mooring aquaculture cages so they move in response to changing current direction on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2190https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2190Tue, 22 Oct 2019 12:58:46 +0100Collected Evidence: Collected Evidence: Locate artificial reefs near aquaculture systems (and vice versa) to act as biofilters We found no studies that evaluated the effects of locating artificial reefs near aquaculture systems to act as biofilters on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2196https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2196Tue, 22 Oct 2019 13:07:49 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the use of sonars We found no studies that evaluated the effects of limiting, ceasing or prohibiting the use of sonars on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2210https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2210Tue, 22 Oct 2019 13:22:25 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the discharge of cooling effluents from power stations We found no studies that evaluated the effects of limiting, ceasing or prohibiting the use of sonars on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2211https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2211Tue, 22 Oct 2019 13:23:02 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the discharge of waste effluents overboard from vessels We found no studies that evaluated the effects of limiting, ceasing or prohibiting the discharge of waste effluents overboard from vessels on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2212https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2212Tue, 22 Oct 2019 13:24:58 +0100Collected Evidence: Collected Evidence: Manage climate-driven range extensions of problematic species We found no studies that evaluated the effects of managing climate-driven range extensions of problematic species on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2217https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2217Tue, 22 Oct 2019 13:35:31 +0100Collected Evidence: Collected Evidence: Limit, cease or prohibit the degradation and/or removal of carbon sequestering species and/or habitats We found no studies that evaluated the effects of limiting, ceasing or prohibiting the degradation and/or removal of carbon sequestering species and/or habitats on subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2220https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2220Tue, 22 Oct 2019 13:37:25 +0100Collected Evidence: Collected Evidence: Locate artificial reefs near aquaculture systems to benefit from nutrient run-offs Two studies examined the effects of locating artificial reefs near aquaculture systems to benefit from nutrient run-offs on subtidal benthic invertebrate populations. One study was in the Gulf of Aqaba (Israel and Jordan), and one in the Mediterranean Sea (Spain).   COMMUNITY RESPONSE (1 STUDY) Overall community composition (1 study): One controlled study in the Mediterranean Sea found that an artificial reef located under aquaculture cages had similar invertebrate community composition to artificial reefs located at sites without aquaculture cages. POPULATION RESPONSE (1 STUDY) Overall abundance (1 study): One controlled study in the Gulf of Aqaba found that an artificial reef located at an aquaculture site had similar invertebrate biomass growing on it compared to an artificial reef located at a site without aquaculture cages. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2260https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2260Wed, 23 Oct 2019 10:51:01 +0100Collected Evidence: Collected Evidence: Offset habitat loss from human activity by restoring or creating habitats elsewhere Two studies examined the effects of offsetting habitat loss from human activity by restoring or creating habitats elsewhere on subtidal benthic invertebrate populations. One study was in the Delaware Bay (USA), the other in the Persian Gulf (Kuwait).   COMMUNITY RESPONSE (1 STUDY) Overall richness/diversity (1 study): One study in the Persian Gulf found that an area of low ecological value restored to offset habitat lost to land reclamation was colonized by over 198 invertebrate species. POPULATION RESPONSE (0 STUDIES) OTHER (1 STUDY) Biological production (1 study): One study in Delaware Bay found that an artificial reef built to offset lost soft-sediment habitat had higher annual secondary production/unit area from sessile invertebrates, but lower total annual secondary production, compared to habitat similar to that lost. Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2265https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2265Wed, 23 Oct 2019 11:03:46 +0100Collected Evidence: Collected Evidence: Organise educational marine wildlife tours to improve behaviours towards marine invertebrates We found no studies that evaluated the effects of organising educational marine wildlife tours to induce behavioural changes and increase engagement in marine conservation on human behaviour and/or subtidal benthic invertebrate populations.   ‘We found no studies’ means that we have not yet found any studies that have directly evaluated this intervention during our systematic journal and report searches. Therefore, we have no evidence to indicate whether or not the intervention has any desirable or harmful effects.Collected Evidencehttps%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2282https%3A%2F%2Fconservationevidencejournal.com%2Factions%2F2282Wed, 23 Oct 2019 13:39:32 +0100
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What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, mammals, forests, peatland and control of freshwater invasive species. More are in progress.

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The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

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