Sustainability of bait fishing harvesting in estuarine ecosystems – Case study in the Local Natural Reserve of Douro Estuary, Portugal

Carvalho, André N.; Vaz, Ana Sofia; Sérgio, Tânia Isabel Boto; Santos, Paulo

doi:10.5894/rgci393

Cited by 19 publications

(38 citation statements)

References 37 publications

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“…); d (from Carvalho et al . ). Mean collectors tide −1 : Mean number of collectors per tide recorded at each site per camera view over 51 (Dell Quay), 54 (Fareham Creek Resident 1), 56 (Fareham Creek Resident 2), 39 (Pagham Harbour east facing) and 37 (Pagham Harbour west facing) tides.…”

Section: Extentmentioning

confidence: 97%

“…; Carvalho et al . ). As the requirement for bait is intimately linked to all coastal communities, it is, therefore, highly likely that these values are replicated at numerous sites around the UK and beyond, although it is clear that there will be considerable variation in bait choice especially in tropical countries where polychaetes may be hard to collect compared to fish.…”

Section: Extentmentioning

confidence: 97%

“…); h (from Carvalho et al . ); i (from Davies ); j (Percentage of sea anglers in UK population combined with number of fishing trips per angler per year, proportion of bait as polychaetes and weight of N. virens used per trip; k (Percentage of sea anglers in USA population combined with number of fishing trips per angler per year, proportion of bait as polychaetes and weight of N. virens used per trip; l (Percentage of sea anglers in Europe combined with number of fishing trips per angler per year, proportion of bait as polychaetes and weight of N. virens used per trip; m (Percentage of sea anglers globally combined with number of fishing trips per angler per year, proportion of bait as polychaetes and weight of N. virens used per trip. Retail price: from Table ; a (mean price of UK species); b (mean price of US species); c (mean price of European species); d (mean price of all species).…”

Section: Extentmentioning

confidence: 99%

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Bait worms: a valuable and important fishery with implications for fisheries and conservation management

et al. 2016

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Bait is an integral part of coastal life, but is perceived as a low‐value resource as fisheries are data‐limited, locally focussed and largely unregulated even though the ecological impacts of collection are considerable. An empirical assessment of three UK‐based ragworm fisheries combined with an analysis of published literature has produced the first global assessment of polychaete bait fisheries. The five most expensive (retail price per kg) marine species sold on the global fisheries market are polychaetes (Glycera dibranchiata, Diopatra aciculata, Nereis (Alitta) virens, Arenicola defodiens and Marphysa sanguinea). We estimate that 1600 t of N. virens per annum (worth £52 million) are landed in the UK with approximately 121 000 tonnes of polychaetes collected globally valued at £5.9 billion. Using remote closed circuit television (CCTV) cameras to monitor collectors, activity at local sites is considerable with a mean of 3.14 collectors per tide (day and night) at one site and individuals digging for up to 3 h per tide, although intensity differed seasonally and between sites. Collectors removed on average 1.4 kg of N. virens per person per hour, walking a considerable distance across the intertidal sediment to reach areas that were usually already dug. The implications of these human activity and biomass removal levels are explored in the context of fisheries and conservation management. At local, regional and national scales, polychaete bait fisheries are highly valuable, extract significant biomass and have considerable impacts; therefore, they urgently require governance equivalent to other fisheries.

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Section: Extentmentioning

confidence: 97%

Section: Extentmentioning

confidence: 97%

Section: Extentmentioning

confidence: 99%

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Bait worms: a valuable and important fishery with implications for fisheries and conservation management

et al. 2016

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“…However, bait harvesting, bait trade (Carvalho et al . ; Mosbahi et al . ) and non‐indigenous species imports may conflict with the marine and estuarine habitat conservation (Font et al .…”

Section: Introductionmentioning

confidence: 99%

Insight into aquaculture's potential of marine annelid worms and ecological concerns: a review

Pombo

Baptista

Granada

et al. 2018

Reviews in Aquaculture

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Polychaetes are marine annelid worms that can contribute to aquaculture diversification. Its culture has been viable, and commercially attempted, but intensive production has progressed only in few countries around the world. In the countries with no production, marine polychaetes are imported or harvested. A strong and sustained research investment provided to a better understanding of the nutritional requirements and reproduction of some species. Recent studies showed new technical improvements, which can lead to an important progress in productivity and give a new impetus to the polychaete production. Some marine worm species were identified as good candidates for integrated multitrophic aquaculture. The development of cost‐effective aquaculture techniques for marine annelid worms is essential to ensure a balance between commercial interests and the preservation of ecosystems. The influence of polychaete aquaculture on the environment and vice versa raise important concerns related to ecological security and sustainability of this activity. This review focus on the main technical improvements and advances that have been made in areas as diverse as: aquaculture potential of polychaetes, reared species, main species used worldwide, and highlights biological and ecological concerns, important challenges and recommendations.

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“…Polychaete is one kind of benthic polychaetes, which are widely distributed in the coastal beaches and estuarine areas. It has high economic value not only as the best marine bait [3], but also has wide prospects for drug development in the ocean and other areas [4]. As a typical marine benthic fauna of deposited diet, polychaete eats detritus and transforms it into body's energy [5].…”

Section: Introductionmentioning

confidence: 99%

The Growth Study of Perinereis aibuhitensis in Airlift Recirculating Aquaculture System

Yang¹,

Cao²,

Wang³

et al. 2015

TOBIOTJ

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For sustainable development of aquaculture industry, it is important to apply biological method and biotechnology to treat the waste of aquaculture. In this paper, an airlift recirculating aquaculture system was designed and polychaete worms were cultured in it. According to the different food level experiments, the growth of Perinereis aibuhitensis was tested in each system with different feeding ratios according to food/total worms' weight percentage. It was marked as M1, M2, M3, M4 and M5 respectively. The water parameters were also tested. The results showed that in the M3 groups, the production of P.aibuhitensis was the highest being 2.36 g/m 2 , while other groups exhibited negative production. Fed on the residual feeds and feces of flounder fish, the mean weight of worms increased to a maximum in M4, which was 1.570g and in M3, it was 0.986g in 40 days. The results provided a novel method to biologically utilize the waste of aquaculture.

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Sustainability of bait fishing harvesting in estuarine ecosystems – Case study in the Local Natural Reserve of Douro Estuary, Portugal

Cited by 19 publications

References 37 publications

Bait worms: a valuable and important fishery with implications for fisheries and conservation management

Bait worms: a valuable and important fishery with implications for fisheries and conservation management

Insight into aquaculture's potential of marine annelid worms and ecological concerns: a review

The Growth Study of Perinereis aibuhitensis in Airlift Recirculating Aquaculture System

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