To pool or not to pool data? Applying a generalized depletion model to assess American eel elver Anguilla rostrata fisheries from multiple rivers in Nova Scotia, Canada DOI
Yu‐Jia Lin,

Brian M. Jessop

Fisheries Management and Ecology, Год журнала: 2023, Номер 31(2)

Опубликована: Дек. 4, 2023

Abstract Spatial scales are important for examining health of exploited fishery stocks and guiding management actions. However, information about the optimal spatial scale is still unclear assessment transit fisheries, such as elver fisheries American eel Anguilla rostrata . We applied a generalized depletion model to assess catch effort data from three nearby rivers (within 50 km) test hypothesis that modeling on pooled separate would give similar estimates abundance exploitation rate. Overall, pooling within km did not result in large differences (<20% relative difference) rate with close mean temporal trends abundance, rate, escapement. Pooling river systems can greatly reduce effort, at cost ignoring fine‐scale variability recruitment having coarser management. When only an index annual interest, may be practical different locations up km.

Язык: Английский

A shift in the trade? An investigation of the eel trade reveals a likely species switch DOI Creative Commons

Joshua Song Yang Choo,

Golam Rabbani,

Elisa X. Y. Lim

и другие.

Conservation Science and Practice, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Abstract Anguillid eels have seen precipitous declines in their population sizes. Because of these declines, a number are currently designated as Endangered, Critically or listed on Convention International Trade Endangered Species Appendix II. While the export critically endangered Anguilla anguilla outside European Union is tightly regulated, large quantities A. juveniles continue to be smuggled out EU Asia where they grown eel farms until reaching marketable size. To investigate prevalence and consumption anguillids—particularly —we examined 327 individual products purchased across 86 retailers throughout Singapore. Identification was conducted through DNA barcoding COI gene. We overwhelmingly identified American eel, rostrata , which accounted for 70% all identifications made, while only three times. These findings may indicate shift trade . This highlights need improved monitoring trade, particularly more desirable anguillids. Our results suggest that warrants specific attention, with increased enforcement needed proactive steps necessary avoid same dramatic been documented other

Язык: Английский

Процитировано

0
Analysis of the fishing intensity and management status of Anguilla japonica fry in the north coast of the Yangtze River Estuary- based on BeiDou VMS data and licenses data DOI

Chengbin Zhang,

Ying Xiong,

Dade Song

и другие.

Fisheries Research, Год журнала: 2025, Номер 287, С. 107406 - 107406

Опубликована: Май 15, 2025

Язык: Английский

Процитировано

0
Anguillids: widely studied yet poorly understood—a literature review of the current state of Anguilla eel research DOI
Rose E. Stuart, Jason D. Stockwell, J. Ellen Marsden

и другие.

Reviews in Fish Biology and Fisheries, Год журнала: 2024, Номер unknown

Опубликована: Сен. 10, 2024

Язык: Английский

Процитировано

2
Participatory stock assessment in West Java contributes to the management of glass eel fisheries in Indonesia DOI
Ronny Irawan Wahju,

Faridz Rizal Fachri,

Mohammad Mukhlis Kamal

и другие.

Marine Policy, Год журнала: 2024, Номер 163, С. 106103 - 106103

Опубликована: Март 22, 2024

Язык: Английский

Процитировано

0
Public preferences for policies promoting the conservation of a universally threatened species (Anguilla spp.): Insights from a choice experiment in Japan DOI Creative Commons

Hermione Froehlicher,

Tina Rambonilaza,

Françoise Daverat

и другие.

Marine Policy, Год журнала: 2024, Номер 168, С. 106325 - 106325

Опубликована: Июль 29, 2024

The population of the Northern temperate eel species (Anguilla spp.) has undergone a significant decline, resulting in their classification as Endangered (American Anguilla rostrata and Japanese japonica) or Critically (European anguilla) by IUCN.The growing global demand for cuisine processed products could potentially exacerbate vulnerability these species.This research examines acceptability conservation policies among consumers.A discrete choice experiment was employed to investigate social acceptance target levels national consumption reduction examine trade-offs made individuals between various policy instruments (e.g., combat against illegal trade, on artificial reproduction, shift substitute species, public awareness campaigns, eco-labelling) costs that they may be willing incur.The econometric analysis identified two distinct groups with contrasting preferences.The first group exhibited strong support current situation.Conversely, second expressed preferences expanding intervention.We further explored sources heterogeneity.Paradoxically, we found education attainment environmental knowledge relation motivations influenced individual status quo.However, higher proenvironmental attitudes are more likely accept reduction.They pay demand-oriented complement existing supply-side measures.

Язык: Английский

Процитировано

0
Using crime script analysis to unveil illegal, unreported, and unregulated (IUU) fishing of European eels DOI Creative Commons
Mònica Pons-Hernández, Gohar A. Petrossian

Marine Policy, Год журнала: 2024, Номер 173, С. 106569 - 106569

Опубликована: Дек. 24, 2024

Язык: Английский

Процитировано

0
Lipoprotein Biology During Induced Oogenesis in the Shortfinned Eel, Anguilla australis—Vascular Transport DOI Creative Commons
Erin L. Damsteegt, Benedetta Mercuriali, Georgia Thomson‐Laing

и другие.

Fishes, Год журнала: 2024, Номер 10(1), С. 1 - 1

Опубликована: Дек. 24, 2024

The ecological, cultural and economic importance of freshwater eels, coupled with declining wild populations, drives the need for artificial propagation these fish. Despite closure lifecycle in captivity over a decade ago, numerous bottlenecks still prevent production at commercially viable scale. Focusing on key event nutrient accumulation, we employed hypophysation 10-week period biweekly sampling female New Zealand shortfinned eels (Anguilla australis). Slotblots, colorimetric lipid/cholesterol assays, fast protein liquid chromatography radioimmunoassay were used to assess aspects blood chemistry. lack any trend triglyceride apolipoprotein B levels plasma time, combined significant reduction cholesterol concentrations 10-fold increase vitellogenin levels, confirmed shift from low-density lipoprotein dominance—usually associated lipid uptake early oogenesis—to an abundance high-density lipoproteins linked vitellogenesis. ongoing presence 11-ketotestosterone circulation 17β-estradiol reinforced steroids mediating gonadotropic signal hypophysation. We conclude that accumulation both apolipoprotein-B-associated lipids is essential eel oocytes during induction maturation.

Язык: Английский

Процитировано

0
To pool or not to pool data? Applying a generalized depletion model to assess American eel elver Anguilla rostrata fisheries from multiple rivers in Nova Scotia, Canada DOI
Yu‐Jia Lin,

Brian M. Jessop

Fisheries Management and Ecology, Год журнала: 2023, Номер 31(2)

Опубликована: Дек. 4, 2023

Abstract Spatial scales are important for examining health of exploited fishery stocks and guiding management actions. However, information about the optimal spatial scale is still unclear assessment transit fisheries, such as elver fisheries American eel Anguilla rostrata . We applied a generalized depletion model to assess catch effort data from three nearby rivers (within 50 km) test hypothesis that modeling on pooled separate would give similar estimates abundance exploitation rate. Overall, pooling within km did not result in large differences (<20% relative difference) rate with close mean temporal trends abundance, rate, escapement. Pooling river systems can greatly reduce effort, at cost ignoring fine‐scale variability recruitment having coarser management. When only an index annual interest, may be practical different locations up km.

Язык: Английский

Процитировано

0