Sloan A. Freeman's research while affiliated with Duke University Marine Lab and other places

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Publications (3)

Table 1. Potential applications illustrating the utility of the...
Fig. 1. Conceptualization of the OBIS-SEAMAP services: (a) Data Mine...
OBIS-SEAMAP: Developing a Biogeographic Research Data Commons for the Ecological Studies of Marine Mammals, Seabirds, and Sea Turtles
Article
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  • Jul 2006
"Our ability to understand, conserve, and manage the planet’s marine biodiversity is fundamentally limited by the availability of relevant taxonomic, distribution, and abundance data. The Spatial Ecological Analysis of Marine Megavertebrate Animal Populations (SEAMAP) initiative is a taxon-specific geo-informatics facility of the Ocean Biogeographi...
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Understanding impacts of fisheries bycatch on sea megafauna
Article
  • Nov 2004
Hunting by humans played a major role in extirpating terrestrial megafauna on several continents and megafaunal loss continues today in both terrestrial and marine ecosystems. Recent declines of large marine vertebrates that are of little or no commercial value, such as sea turtles, seabirds and marine mammals, have focused attention on the ecologi...
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Quantifying the effects of fisheries on threatened species: The impact of pelagic longlines on loggerhead and leatherback sea turtles
Article
  • Mar 2004
The depletion of fish stocks from global fisheries has been a long-standing concern. More recently, incidental catch of non-target (termed bycatch) vertebrates also has been proposed as a serious conservation issue. Here we present a bycatch assessment for loggerhead and leatherback sea turtles that are incidentally caught by global pelagic longlin...
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Citations

... The most accurate method for quantifying bycatch rates is to employ independent onboard observers who collect data to calculate bycatch per unit effort (Alverson et al., 1994;Oliveira et al., 2015), enabling extrapolation of rates across entire fishery fleets (Rago et al., 2005). Unfortunately, the costs of implementing onboard observer programmes are often prohibitive (Lewison et al., 2004a;Moore et al., 2010), especially in developing countries where research funding is relatively limited. Fishing logbook data can constitute a low-cost alternative, but such data are often incomplete or inaccurate (Walsh et al., 2002;Basran and Sigurðsson, 2021). ...
Reference: An interview-based investigation of marine megafauna bycatch in the northern South China Sea
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... Entanglement or accidental capture of marine fauna in artisanal or commercial fisheries has contributed to widespread population declines of many species, and is an urgent conservation issue worldwide (Lewison et al., 2004b;Brownell Jr et al., 2019). Bycatch may impact a wide variety of species, including invertebrates and vertebrate taxa ranging from low trophic-level fishes to top-predator marine megafauna (Wallace et al., 2010;Gilman, 2011;Tulloch et al., 2020). ...
Reference: An interview-based investigation of marine megafauna bycatch in the northern South China Sea
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... The shortfalls of this approach are becoming evident, with only about 7% of the world's oceans designated as protected (UNEP-WCMC and IUCN 2020). With current management processes so strongly focused on working in an impact-by-impact framework, there are entrenched scientific, cultural and institutional challenges to shifting those processes toward ecosystem-based management and marine spatial planning, which address multiple human uses of the ocean, their cumulative impacts and interactive effects (Halpin et al. 2006). ...
Reference: Multiple Stressors
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