David M. Kaplan
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View article: A systematic review of the current state of marine functional connectivity research
A systematic review of the current state of marine functional connectivity research Open
Marine functional connectivity underpins biodiversity and ecosystem functions, ensuring resilience in marine and land-sea interface ecosystems. Research on this topic has advanced rapidly in recent decades, as reflected in the growing body…
View article: First look at the distribution of deactivated dFADs used by the French Indian Ocean tropical tuna purse-seine fishery
First look at the distribution of deactivated dFADs used by the French Indian Ocean tropical tuna purse-seine fishery Open
The presence of abandoned, lost or otherwise discarded fishing gears, including drifting fish aggregating devices (dFADs), in marine ecosystems poses significant ecological and socioeconomic concerns. The estimation of the number of dFADs …
View article: Modeling bycatch abundance in tropical tuna purse seine fisheries on floating objects using the Δ method
Modeling bycatch abundance in tropical tuna purse seine fisheries on floating objects using the Δ method Open
Bycatch rates are essential to estimating fishery impacts and making management decisions, but data on bycatch are often limited. Tropical tuna purse seine (PS) fisheries catch numerous bycatch species, including vulnerable silky sharks. E…
View article: The challenge of assessing the effects of drifting fish aggregating devices on the behaviour and biology of tropical tuna
The challenge of assessing the effects of drifting fish aggregating devices on the behaviour and biology of tropical tuna Open
Fishers have intensively used drifting fish aggregating devices (DFADs) over the last three decades to facilitate their catch of tropical tunas. DFADs increase purse‐seine efficiency, potentially increasing tuna fishing mortality. They cou…
View article: A theoretical framework for upscaling species distribution models
A theoretical framework for upscaling species distribution models Open
Species distribution models (SDM) have become one of the most popular predictive tools in ecology. With the advent of new computation and remote sensing technology, high‐resolution environmental data sets are becoming more and more common …
View article: Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices
Benefits, concerns, and solutions of fishing for tunas with drifting fish aggregation devices Open
Drifting fish aggregating devices (dFADs) are human‐made floating objects widely used by tropical tuna purse seine (PS) fisheries to increase catch of target species. However, dFAD use has several negative impacts, including increased pote…
View article: Corridors and barriers to marine connectivity around southern Africa
Corridors and barriers to marine connectivity around southern Africa Open
Detailed knowledge on connectivity, i.e. the exchange of marine organisms among geographically separated populations, is essential for effective marine spatial planning strategies and the design of marine protected areas (MPAs) in coastal …
View article: Coastal connectivity of an abundant inshore fish species: model-data comparison along the southern coast of South Africa
Coastal connectivity of an abundant inshore fish species: model-data comparison along the southern coast of South Africa Open
Biophysical models are often used to estimate larval dispersal patterns for the assessment of marine metapopulation spatial structure. However, comparisons of these models with field observations are relatively rare, and the extent to whic…
View article: knitrdata: A Tool for Creating Standalone Rmarkdown Source Documents
knitrdata: A Tool for Creating Standalone Rmarkdown Source Documents Open
Though Rmarkdown is a powerful tool for integrating text with code for analyses in a single source document exportable to a variety of output formats, until now there has been no simple way to integrate the data behind analyses into Rmarkd…
View article: Spatiotemporal structure of narrow-barred Spanish mackerel (<i>Scomberomorus commerson</i>) from the Red Sea and western Indian Ocean based on otolith micro-chemistry
Spatiotemporal structure of narrow-barred Spanish mackerel (<i>Scomberomorus commerson</i>) from the Red Sea and western Indian Ocean based on otolith micro-chemistry Open
Though the narrow-barred Spanish mackerel ( Scomberomorus commerson ) is considered to be migratory, the species is nevertheless thought to be locally overexploited in the northwest Indian Ocean. At the regional level, this local depletion…
View article: Brief on Primary Care Part 1: The Roles of Primary Care Clinicians and Practices in the First Two Years of the COVID-19 Pandemic in Ontario
Brief on Primary Care Part 1: The Roles of Primary Care Clinicians and Practices in the First Two Years of the COVID-19 Pandemic in Ontario Open
About Us: The Ontario COVID-19 Science Advisory Table is a group of scientific experts and health system leaders who evaluate and report on emerging evidence relevant to the COVID-19 pandemic, to inform Ontario's response.The Science Advis…
View article: Sources of marine debris for Seychelles and other remote islands in the western Indian Ocean
Sources of marine debris for Seychelles and other remote islands in the western Indian Ocean Open
Vast quantities of marine debris have beached at remote islands in the western Indian Ocean such as Seychelles, but little is known about where this debris comes from. To identify these sources and temporal patterns in accumulation rate, w…
View article: Spatio-temporal variability in drifting Fish Aggregating Device (dFAD) beaching events in the Seychelles Archipelago
Spatio-temporal variability in drifting Fish Aggregating Device (dFAD) beaching events in the Seychelles Archipelago Open
Purse-seine fisheries use drifting Fish Aggregating Devices (dFADs), human-made floating objects, to facilitate the capture of tropical tunas. Currently, the majority of dFADs are constructed primarily of highly durable non-biodegradable m…
View article: Recovery at sea of abandoned, lost or discarded drifting fish aggregating devices
Recovery at sea of abandoned, lost or discarded drifting fish aggregating devices Open
Tropical tuna purse-seine fishing vessels contribute to abandoned, lost or discarded (ALD) fishing equipment by deploying large numbers of drifting Fish Aggregating Devices (dFADs). Here we analysed more than 80,000 dFAD trajectories (56,2…
View article: Trade-offs between bycatch and target catches in static versus dynamic fishery closures
Trade-offs between bycatch and target catches in static versus dynamic fishery closures Open
Significance The incidental catch of threatened species is still one of the main barriers to fisheries sustainability. What would happen if we closed 30% of the ocean to fishing with the goal of reducing bycatch? Analyzing 15 different fis…
View article: Successful artificial reefs depend on getting the context right due to complex socio-bio-economic interactions
Successful artificial reefs depend on getting the context right due to complex socio-bio-economic interactions Open
Artificial reefs (ARs) are one of the most popular means of supporting marine ecosystem conservation and coastal fisheries, particularly in developing countries. However, ARs generate complex socio-bio-economic interactions that require ca…
View article: Artificial reefs: a double-edged fishery management tool
Artificial reefs: a double-edged fishery management tool Open
Artificial reefs (ARs) are one of the most popular means of supporting marine ecosystem conservation and coastal fisheries, particularly in developing countries. However, ARs generate complex socio-bio-economic interactions that require ca…
View article: Statistics of the French purse seine fishing fleet targeting tropical tuna in the Indian Ocean (1981-2020)
Statistics of the French purse seine fishing fleet targeting tropical tuna in the Indian Ocean (1981-2020) Open
This document presents an updated summary of the French purse seine fleet targeting tropical tunas in the Indian Ocean. The statistics cover the period 1981-2020 and specifically focus on the activity of the last year of the fishery. In 20…
View article: Spatial management can significantly reduce dFAD beachings in Indian and Atlantic Ocean tropical tuna purse seine fisheries
Spatial management can significantly reduce dFAD beachings in Indian and Atlantic Ocean tropical tuna purse seine fisheries Open
Debris from fisheries pose significant threats to coastal marine ecosystems worldwide. Tropical tuna purse seine fisheries contribute to this problem via the construction and deployment of thousands of man-made drifting fish aggregating de…
View article: Quantifying the increase in fishing efficiency due to the use of drifting FADs equipped with echosounders in tropical tuna purse seine fisheries
Quantifying the increase in fishing efficiency due to the use of drifting FADs equipped with echosounders in tropical tuna purse seine fisheries Open
Numerous pelagic species are known to associate with floating objects (FOBs), including tropical tunas. Purse seiners use this behaviour to facilitate the capture of tropical tunas by deploying artificial drifting fish aggregating devices …
View article: Virginia Beached Sea Turtle Survey
Virginia Beached Sea Turtle Survey Open
Sea turtles around the world are threatened with extinction, largely due to human activities. To better protect sea turtles, we need to improve our understanding of the activities that threaten them. However, we often do not know the cause…
View article: Barriers to Eastern Oyster Aquaculture Expansion in Virginia
Barriers to Eastern Oyster Aquaculture Expansion in Virginia Open
The eastern oyster once provided major societal and ecosystem benefits, but these benefits have been threatened in recent decades by large declines in oyster harvests. In many areas, recovery of oyster aquaculture faces significant societa…