A5049953496- Marine and fisheries research
- Fish Ecology and Management Studies
- Ichthyology and Marine Biology
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Marine Bivalve and Aquaculture Studies
- Wildlife Ecology and Conservation
- Aquaculture Nutrition and Growth
- Marine and environmental studies
- Animal Ecology and Behavior Studies
- Economic and Environmental Valuation
- Surface Roughness and Optical Measurements
- Remote Sensing and LiDAR Applications
- Identification and Quantification in Food
- Fish biology, ecology, and behavior
Federal Agency for Nature Conservation
2023
Dalhousie University
2015-2021
Abstract This study presents a new method (LBB) for the analysis of length frequency data from commercial catches. LBB works species that grow throughout their lives, such as most commercially-important fish and invertebrates, requires no input in addition to data. It estimates asymptotic length, at first capture, relative natural mortality, fishing mortality. Standard fisheries equations can then be used approximate current exploited biomass unexploited biomass. In addition, these...
Marine protected areas (MPAs) are increasingly used as a primary tool to conserve biodiversity. This is particularly relevant in heavily exploited fisheries hot spots such Europe, where MPAs now cover 29% of territorial waters, with unknown effects on fishing pressure and conservation outcomes. We investigated industrial trawl sensitive indicator species around 727 designated by the European Union. found that 59% commercially trawled, average trawling intensity across at least 1.4-fold...
Abstract The Law of the Sea and regional national laws agreements require exploited populations or stocks to be managed so that they can produce maximum sustainable yields. However, exploitation level stock status are unknown for most because data required full assessments missing. This study presents a new method [abundance yields (AMSY)] estimates relative population size when no catch available using time series catch-per-unit-effort other abundance indices as main input. AMSY predictions...
There is a recognized need for new methods with modest data requirements to provide preliminary estimates of stock status data-limited stocks (e.g. Rudd and Thorson, 2018). Froese et al. (2018) such method, which derives relative size from length frequency (LF) exploited stocks. They show that their length-based Bayesian biomass estimation method (LBB) can reproduce the “true” parameters used in simulated approximate as estimated independently by more data-demanding 34 real...
Abstract Against the background of UN decade on ecosystem restoration and new EU Biodiversity Strategy for 2030, in context marine spatial planning complex maritime user conflicts, reliable information habitat suitability large‐scale is an important prerequisite implementing conservation management supporting successful, sustainable, ecologically efficient measures. In this study, was assessed using multicriteria decision analysis (MCDA) European oyster, Ostrea edulis , protected areas...
The somatic growth of individuals governs many aspects a species' life history and is an important parameter in the assessment populations. Population parameters are typically derived by relating length to their age, with ages commonly estimated from bands formed calcified structures such as vertebrae or dorsal fin spines. However, routinely utilized aging methods may not be reliable for elasmobranchs (sharks, rays skates), motivating alternative approaches. This study evaluates performance...
Abstract Information about the survival of species is important in many ecological applications. Yet, estimation a species’ natural mortality rate M remains major problem management and conservation wild populations, often circumvented by applying empirical equations that relate to other traits are more easily observed. We show mean adult can be approximated from general law decay if average maximum age reached individuals cohort known. This possible because proportion P surviving...
Elasmobranchs typically display slow growth, late maturity and low fecundity life history characteristics, making them vulnerable to fishing pressures environmental perturbations. The whitespotted eagle ray ( Aetobatus narinari ), a large pelagic migratory with an endangered status on the IUCN Red List, fits this pattern based available literature. Historically, age growth parameters for have been reported through vertebral ageing methods. However, periodicity of vertebrate band pair...
This study addresses the inherent uncertainty when estimating growth from limited mark–recapture information. A selection procedure was developed utilizing 18 competing estimation methods. The optimal method for a given data set identified by simulating length at capture and recapture under different scenarios of measurement error variability while considering structure observed data. applied to 37 female 16 male tope sharks Galeorhinus galeus obtained tagging studies in north‐east Atlantic...