Search Results - "KERWATH, Sven E"

Heavy metals in marine fish meat and consumer health: a review by Bosch, Adina C, O'Neill, Bernadette, Sigge, Gunnar O, Kerwath, Sven E, Hoffman, Louwrens C

“…The numerous health benefits provided by fish consumption may be compromised by the presence of toxic metals and metalloids such as lead, cadmium, arsenic and…”
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Heavy metal accumulation and toxicity in smoothhound (Mustelus mustelus) shark from Langebaan Lagoon, South Africa by Bosch, Adina C., O’Neill, Bernadette, Sigge, Gunnar O., Kerwath, Sven E., Hoffman, Louwrens C.

“…•ICP-MS and HPLC–ICP-MS were used to measure total metals and mercury species.•Total Hg levels in 37% of M. mustelus samples exceeded maximum allowable…”
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ROV assessment of mesophotic fish and associated habitats across the continental shelf of the Amathole region by Button, Rio E., Parker, Denham, Coetzee, Vivienne, Samaai, Toufiek, Palmer, Ryan M., Sink, Kerry, Kerwath, Sven E.

“…Understanding how fish associate with habitats across marine landscapes is crucial to developing effective marine spatial planning (MSP) in an expanding and…”
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Crossing Invisible Boundaries: the Effectiveness of the Langebaan Lagoon Marine Protected Area as a Harvest Refuge for a Migratory Fish Species in South Africa by KERWATH, SVEN E, THORSTAD, EVA B, NÆSJE, TOR F, COWLEY, PAUL D, ØKLAND, FINN, WILKE, CHRIS, ATTWOOD, COLIN G

“…The application of no-take areas in fisheries remains controversial. Critics argue that many targeted species are too mobile to benefit from area protection…”
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Marine protected area improves yield without disadvantaging fishers by Kerwath, Sven E., Winker, Henning, Götz, Albrecht, Attwood, Colin G.

“…Potential fishery benefits of Marine Protected Areas (MPAs) are widely acknowledged, yet seldom demonstrated, as fishery data series that straddle MPA…”
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Mercury accumulation in Yellowfin tuna (Thunnus albacares) with regards to muscle type, muscle position and fish size by Bosch, Adina C., O’Neill, Bernadette, Sigge, Gunnar O., Kerwath, Sven E., Hoffman, Louwrens C.

“…•No variation in Hg species accumulation was detected within the white muscle.•tHg and iHg had higher concentrations (p<0.001) in dark muscle than white…”
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A step-by-step framework to assess benefits of established temperate marine protected areas by Gotz, Albrecht, Kerwath, Sven E, Attwood, Colin G

“…Marine protected areas (MPAs) have been advocated as a solution to the challenges of both conservation and modern fishery management, but their application…”
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Notes on a remotely operated vehicle survey to describe reef ichthyofauna and habitats - Agulhas Bank, South Africa by Makwela, Mapula S., Samaai, Toufiek, Götz, Albrecht, Sink, Kerry, Kerwath, Sven E., Wilke, Christopher G.

“…Background: Despite their ecological and economic importance, reef habitats on the central Agulhas Bank, off the southern tip of Africa, remain poorly studied…”
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Acid-base adjustments and first evidence of denticle corrosion caused by ocean acidification conditions in a demersal shark species by Dziergwa, Jacqueline, Singh, Sarika, Bridges, Christopher R., Kerwath, Sven E., Enax, Joachim, Auerswald, Lutz

“…Global ocean acidification is expected to chronically lower the pH to 7.3 (>2200 µatm seawater p CO 2 ) by the year 2300. Acute hypercapnia already occurs…”
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Assessment of the effectiveness of South Africa's marine protected areas at representing ichthyofaunal communities by SOLANO-FERNÁNDEZ, SOFÍA, ATTWOOD, COLIN G., CHALMERS, RUSSELL, CLARK, BARRY M., COWLEY, PAUL D., FAIRWEATHER, TRACEY, FENNESSY, SEAN T., GÖTZ, ALBRECHT, HARRISON, TREVOR D., KERWATH, SVEN E., LAMBERTH, STEPHEN J., MANN, BRUCE Q., SMALE, MALCOLM J., SWART, LIEZE

“…National and international policies have encouraged the establishment of a representative network of marine protected areas (MPAs) in South Africa, with the…”
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Tracking the decline of the world’s largest seabream against policy adjustments by Kerwath, Sven E., Parker, Denham, Winker, Henning, Potts, Warren, Mann, Bruce, Wilke, Christopher, Attwood, Colin

“…For most rare marine species, abundance trends are poorly estimated. This uncertainty often translates into disagreement on management regulations, impeding…”
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Strong trans-Pacific break and local conservation units in the Galapagos shark (Carcharhinus galapagensis) revealed by genome-wide cytonuclear markers by Pazmiño, Diana A, Maes, Gregory E, Green, Madeline E, Simpfendorfer, Colin A, Hoyos-Padilla, E Mauricio, Duffy, Clinton J A, Meyer, Carl G, Kerwath, Sven E, Salinas-de-León, Pelayo, van Herwerden, Lynne

“…The application of genome-wide cytonuclear molecular data to identify management and adaptive units at various spatio-temporal levels is particularly important…”
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Proof of concept for a novel procedure to standardize multispecies catch and effort data by Winker, Henning, Kerwath, Sven E., Attwood, Colin G.

“…The effect of variability in targeting needs to be removed from catch-per-unit-effort (CPUE) data to estimate reliable abundance indices for multispecies…”
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Comparison of two approaches to standardize catch-per-unit-effort for targeting behaviour in a multispecies hand-line fishery by Winker, Henning, Kerwath, Sven E., Attwood, Colin G.

“…► We develop a novel method of deriving relative abundance indices from multispecies catch rate data. ► The new method is easier to implement and statistically…”
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Metal concentrations and toxicity in South African snoek (Thyrsites atun) and yellowtail (Seriola lalandi) by Bosch, Adina C., O'Neill, Bernadette, Kerwath, Sven E., Sigge, Gunnar O., Hoffman, Louwrens C.

“…The concentrations of 16 metals were assessed in snoek(Thyrsites atun; n=20) and yellowtail (Seriola lalandi; n=37) sampled from the West and South-East coasts…”
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Presence, concentration and trends of metals: A baseline study of blacktail (Diplodus sargus capensis) and hottentot (Pachymetopon blochii) along the South African coastline by O'Neill, Bernadette, Bosch, Adina C., Kerwath, Sven E., Sigge, Gunnar O., Hoffman, Louwrens C.

“…•Most metals (n=8) was significantly higher in blacktail than Hottentot.•13 and 1 blacktail fish exceeded the MALs for arsenic and mercury…”
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Bycatch in South Africa's inshore trawl fishery as determined from observer records by Attwood, Colin G., Petersen, Samantha L., Kerwath, Sven E.

“…Attwood, C. G., Petersen, S. L., and Kerwath, S. E. 2011. Bycatch in South Africa's inshore trawl fishery as determined from observer records. - ICES Journal…”
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Effects of fishing on population structure and life history of roman Chrysoblephus laticeps (Sparidae) by Götz, A, Kerwath, SE, Attwood, CG, Sauer, WHH

“…The effects of fishing on the population structure and life history of roman Chrysoblephus laticeps, a protogynous hermaphroditic seabream from South Africa,…”
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The effects of gender, size and life-cycle stage on the chemical composition of smoothhound shark (Mustelus mustelus) meat by Bosch, Adina C, Sigge, Gunnar O, Kerwath, Sven E, Cawthorn, Donna-Mareè, Hoffman, Louwrens C

“…BACKGROUND Knowledge on the chemical composition of foods, and on the variation in such components as influenced by endogenous factors, is required for…”
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An Exploratory Investigation of the Fish Communities Associated with Reefs on the Central Agulhas Bank, South Africa by Götz, Albrecht, Kerwath, Sven E, Samaai, Toufiek, Silva, Charlene da, Wilke, Christopher G

“…Despite their ecological and economic importance, the temperate reef habitats of the central Agulhas Bank remain poorly studied. From 2008 to 2010, multiple…”
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