A5090192041- Marine and fisheries research
- Fish Ecology and Management Studies
- Coral and Marine Ecosystems Studies
- Marine Bivalve and Aquaculture Studies
- Video Surveillance and Tracking Methods
- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Maritime Navigation and Safety
- Underwater Vehicles and Communication Systems
- Image Enhancement Techniques
- Marine animal studies overview
- Coastal and Marine Management
- Avian ecology and behavior
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Survey Methodology and Nonresponse
- International Maritime Law Issues
- Advanced Vision and Imaging
- Marine Sponges and Natural Products
- Ocean Acidification Effects and Responses
- Animal Behavior and Reproduction
- Fish Biology and Ecology Studies
- Water Quality and Resources Studies
- Ichthyology and Marine Biology
- Anomaly Detection Techniques and Applications
National Institute of Water and Atmospheric Research
2011-2024
Ministry for Primary Industries
2022
Abstract Marine recreational fishing ( MRF ) is a high‐participation activity with large economic value and social benefits globally, it impacts on some fish stocks. Although reporting catches European Union legislative requirement, estimates are only available for countries. Here, data numbers of fishers, participation rates, days fished, expenditures, two widely targeted species were synthesized to provide placed in the global context. Uncertainty assessment was not possible due incomplete...
Abstract The growing awareness of the impact that recreational fishers can have on fish stocks has highlighted paucity information used to inform their management. Most available scale and nature catch effort come from intermittent labour‐intensive surveys provide fragmented insights into often highly variable fisheries. Digital cameras offer a more cost‐effective means continuously monitoring trends in fishing effort, it is surprising greater use this approach not been made date given its...
Using individually coded acoustic transponders and an array of 15 moored receivers (detection range ~300 m), the temporal spatial movements temperate snapper Pagrus auratus (Sparidae) were studied within estuary. Of 28 fish initially tagged, 20 subsequently detected study area for up to 70 days. The scale daily was in order hundreds metres most fish, suggesting relatively restricted home ranges over period monitored (November–January). detectability remaining estuary lower at night, probably...
Abstract Fisheries managers are becoming increasingly aware of the need to quantify all forms harvest, including that by recreational fishers. This has been driven both a growing recognition potential impact noncommercial fishers can have on exploited resources and requirement allocate catch limits between different sectors wider fishing community in many jurisdictions. Marine rarely required report any their activity, some form survey technique is usually estimate levels effort. In this...
Intraspecific variation in movement patterns are well established for many species, but poorly appreciated fisheries management. In this study we dart-tagged snapper ( Pagrus auratus ), an important fishery across different areas and habitats the Hauraki Gulf, New Zealand. Tag returns were used to quantify behaviour extraction rates using a maximum likelihood model that corrected spatial variability population size fishing effort. Residency was high (~90%) two strata lower (75%) remaining...
We compare estimates of recreational harvest provided concurrently by two fundamentally different survey designs: an offsite panel and onsite aerial-access survey. Aerial-access for the five most commonly caught species were 2% to 50% lower than estimates, with greatest differences apparent least species. Boosted regression tree modelling spatially temporally disaggregated identified a consistent pattern temporal bias that explained much difference between sets estimates. An analysis web...
There are often limited data available to support the sustainable management of recreational fisheries. Electronic citizen science platforms (e.g., smartphone applications) offer a cost-effective alternative traditional survey methods — but these must be validated. We compared sea trout (Salmo trutta) from Danish platform with three independent surveys: roving creel survey, an aerial and recall survey. The comparisons include fisheries catch, release, effort, fish size structure) demographic...
Anthropogenic disturbance of deep-sea benthic systems, especially by fishing, has increased markedly in the last 40 years. Deep-sea mining and extraction fossil fuels can occur at extraordinary intensity individual sites, but large number fishing vessels their mobility probably makes commercial trawling most pervasive our marine activities to depths up about 1200 m. Knowledge effects on soft-sediment, communities is, however, limited shallow, coastal mostly small spatial scales. We extend...
Abstract Norway has the highest participation rate in marine recreational fisheries (MRF) Europe, and is popular among tourist anglers. Fishing licences are not required for anglers, complex long coastline makes on-site surveys a challenge. A novel approach spatial sampling was developed tested surveys, as part of National study MRF using multiple frames including telephone screening survey based on national directory. Field were conducted Troms Hordaland Counties, Oslofjord. We created...
Abstract We used a maximum‐count aerial‐access survey design to estimate the 12‐month recreational harvest of snapper Chrysophrys ( Pagrus ) auratus (also known as squirefish) taken by New Zealand's largest fishery. To provide count all boats fishing on given day, spatial extent 3,800‐km 2 Hauraki Gulf embayment was surveyed from air random stratified selection days at approximate time maximum effort. Anglers were also censused subset available access points same day. The ratio aerial number...
Abstract Catchability is often a key source of uncertainty with any stock assessment, but especially for burrowing species, as their emergent behaviour poorly understood. Quantification catchability will provide major step towards improvements in the assessment many species. Scampi (Metanephrops challengeri) are widely distributed around New Zealand, and Nephrops (Norway lobster), they occupy burrows muddy substrate, exploited through trawl fisheries, only available to these fisheries when...
Abstract A submarine lantern system was trailed in the aquaculture of explants endemic New Zealand bath‐sponge Spongia (Heterofibria) manipulatus (Demospongiae: Dictyoceratida: Spongiidae) at four sites, two Marlborough Sounds and off Coromandel Peninsula. The main objectives were to compare growth rates different these with those control sponges, assess utility lanterns for culture this species. After a period 13 months, sponges exposed Bonne Point on average 73% larger estimated volume...
Abstract Catch‐and‐release angling is common in recreational fisheries, but post‐release mortality (PRM) may be high. We conducted a controlled field experiment to estimate of released snapper Chrysophrys auratus . Recreational fishers caught 960 from three depth strata (<15, 15–25, 26–40 m) that were either lip‐hooked, foul‐hooked or gut‐hooked. A bottom longline vessel 162 lip‐hooked fish shallow water serve as controls. Fish held 15‐m deep holding nets. All control and 80% treatment...
Smartphone applications for anglers that function as citizen science platforms are an alternative to the traditional survey methods used collect data from recreational fisheries. Comparisons between these two needed understand impacts of biases associated with generated smartphone applications. However, such comparisons uncommon, especially multiple fisheries over time and across space. In this study, we compared catch effort electronic platform offsite web-based recall consecutive (i)...
Background modelling, used in many vision systems, must be robust to environmental change, yet sensitive enough identify all moving objects of interest. Existing background modelling approaches have been developed interpret images terrestrial situations, such as car parks and stretches road, where move a smooth manner the is relatively consistent. In context maritime boat ramps surveillance, this paper proposes cognitive method for land water composition scenes (CBM-lw) traffic boats passing...
Background modelling, used in many vision systems, must be robust to environmental change, yet sensitive enough identify all moving objects of interest. Existing background modelling approaches have been developed interpret images terrestrial situations, such as car parks and stretches road, where move a smooth manner the is relatively consistent. In context maritime boat ramps surveillance, this paper proposes cognitive method for land water composition scenes (CBM-lw) traffic boats passing...