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| Marine Resource Fact Sheet |
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| Blackbellied angler - Northern Adriatic Sea |
 | Lophius budegassa - Northern Adriatic Sea (GSA 17) |
| | Data Ownership | | This document provided, maintained and owned by General Fisheries Commission for the Mediterranean (GFCM) , is part of GFCM Stock Status Reports data collection. |
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| Related observations | Locate in inventory | | | | Species: | | FAO Names: en - Blackbellied angler, fr - Baudroie rousse, es - Rape negro |
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| Geographic extent of Blackbellied angler - Northern Adriatic Sea
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| GFCM geographical sub-areas |
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| 17 | Northern Adriatic |
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| Main Descriptors | Considered a single stock: Yes
Spatial Scale: Sub-Regional
Management unit: Yes
Reference year: 2019
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| Considered a single stock: A group of individuals in a species occupying a well defined spatial range independent of other stocks of the same species. It can be affected by random dispersal movements and directed migrations due to seasonal or reproductive activity. |
| Spatial Scale: Spatial scale contains a standard term such as Global, Regional (e.g. for the whole Atlantic), sub-regional (e.g. for a part of the Atlantic), national, local (for sub-national levels). |
| Considered a management unit: An aquatic resource or fishery is
declared as [Fishery] Management Unit if it is
effectively the focus for the application of selected
management methods and measures, within the broader
framework of a management system. According to the FAO
Glossary for Responsible Fishing, "a Fishery Management
Unit (FMU) is a fishery or a portion of a fishery
identified in a Fishery Management Plan (FMP) relevant
to the FMP's management objectives." FMU's may be
organised around fisheries biological, geographic,
economic, technical, social or ecological dimensions ,
and the makeup and attribute of a fishery management
unit depends mainly on the FMP's management
objectives. |
| Jurisdictional distribution: Jurisdictional qualifier (e.g.
"shared", "shared - highly migratory") of the aquatic
resource related with its spatial distribution. |
| Environmental group: Classification of the aquatic
resource according to the environmental group (e.g.
pelagic invertebrate, or demersal fish) to which the
species belong. |
| Reference Year: The Reference Year is the last year considered in the stock assessment and/or fishery status. |
| | | | | | Biological State and Trend Possibly in overexploitation. [The GFCM methodology to provide stock status and management advice is described in the Appendix F of the Sixteenth Session of the Scientific Advisory Committee Report. See the Bibliography section.] Habitat and Biology Climatic zone: Temperate. Bottom type: Soft bottom muddy or muddy-sand. Depth zone: Shelf (50 m - 200 m); Slope (200 m - 1000 m). Horizontal distribution: Neritic. Vertical distribution: Benthic. Geographical Distribution Jurisdictional distribution: Unspecified Water Area Overview Spatial Scale: Sub-Regional Geo References  | | Geographic extent of Blackbellied angler - Northern Adriatic Sea
| GFCM geographical sub-areas | 17: Northern Adriatic |
| | | | | | More Geo References
| FAO Fishing Statistical Division Areas | 37.2.1: Adriatic |
| | | | | | Intersecting Major FAO areas and LME areas |
The following area codes have been found as intersecting the distribution of Blackbellied angler - Northern Adriatic Sea Resource Structure Considered a single stock: Yes Stock assessment in the GFCM area of application is often conducted by management units, based on GSAs. This method does not ensure that the whole stock is assessed, since stocks may cover several different management units. In some cases, when there is scientific evidence of a stock spreading through different GSAs, as well as information on species from different GSAs, existing information is combined across GSAs. This is then defined as a “joint stock assessment of a shared stock”. The GFCM recommends that when scientific evidence of shared stocks exists, joint stock assessments should be attempted. A number of activities aimed at achieving a better definition of stock boundaries are currently being conducted at the GFCM level. [The State of Mediterranean and Black Sea Fisheries, 2016] Exploitation The black-bellied angler is widespread in the Adriatic Sea, mostly in the Croatian channel regions and in the open sea. Although widely distributed, this resource is not abundant and is fished primarily with bottom trawl nets. Due to its scarce abundance and to its high economic value, it is an important accessory species. The depth range of black bellied angler is between 13 m and 404 m and most of the catches come from depths between 90 m and 170 m. Due to its depth preference, only Italian and Croatian fleets catch a significant amount of this resource, with a ratio of nearly 4:1 for the period 2009-2019. Slovenian catches were negligible. Catch statistics were available for the Italian fleet for the period 1954-2019, while for the Croatian fleet only from year 2009. An exploration of historical Croatian landings was attempted without success, and it was not possible to reconstruct Croatian missing catches due to different fisheries restrictions imposed in the past. It was indeed necessary to make assumptions on the missing data and to perform a sensitivity analysis to test the effect of the data uncertainties. Assessment Data Landings for Italy (1953-2019), Slovenia (2008-2019) and Croatia (2009-2019), and MEDITS survey index (1994-2019). Catch data for black-bellied angler were not available or confounded with angler (Lophius piscatorius). The ratio between angler and black-bellied angler in MEDITS data was almost steadily 1:9, therefore catches for Lophius spp. were considered to be representative of black-bellied angler. Catches were available for Croatia from 2009 onward, while Italian data were available from 1953. Due to different fisheries restrictions imposed in the past, it was not possible to reconstruct Croatian missing landings. To obtain the data for a sensitivity analysis, ten different time series for Croatian landings were simulated as random walks catch trajectories, taking as starting value (xt) the observed catches for Croatia in 2009 and simulating xt-1 as xt+wt, where wt comes from a normal distribution with mean = 0 and standard deviation = standard deviation in Croatian catches in the available data. Assessment Model Type: Biomass-aggregated CMSY CMSY (Froese et al., 2017): Bayesian state space implementation of the Schaefer surplus production model. Priors for final depletion obtained with AMSY (Froese et al. al., 2020). Sensitivity analysis was done by fitting the best model on all the combinations of the catch data including the simulations. Overall Assessment Results Biomass trend remained stable until the middle of the 1980s, then it faced a steep decline resulting in B < Bmsy in 1989. In following years, the biomass trend raised again until 2002, when it started to decline and went below the Bmsy in 2011. During the last years the biomass trend stabilized around 0.9 Bmsy. Exploitation pattern remained stable until the beginning of the 1980s, then it sharply rose and spiked in 1987 at F/Fmsy = 1.25. In following years, F declined until 1998, when it returned to values comparable to the first part of the series. From 1999 onward, F began to rise and continued almost linearly until 2019, which registered the highest value of the time series. Due to large data uncertainties, these results should be taken as qualitative. Scientific Advice Reduce fishing mortality. Management Management unit: Yes Source of information FAO. 2021. General Fisheries Commission for the Mediterranean. Report of the twenty-second session of the Scientific Advisory Committee on Fisheries, online, 22–25 June 2021. FAO Fisheries and Aquaculture Report No. 1347. Rome.  https://www.fao.org/3/cb7622en/cb7622en.pdfReport of the Working Group on Stock Assessment of Demersal Species (WGSAD). Online, 18–23 January 2021.  https://www.fao.org/gfcm/technical-meetings/detail/en/c/1412431/Bibliography FAO. 2020. The State of Mediterranean and Black Sea Fisheries 2020. General Fisheries Commission for the Mediterranean. Rome. https://www.fao.org/3/cb2427en/cb2427en.pdfFAO. 2016. The State of Mediterranean and Black Sea Fisheries. General Fisheries Commission for the Mediterranean. Rome, Italy. https://www.fao.org/3/i5496e/i5496e.pdfFAO General Fisheries Commission for the Mediterranean/Commission générale des pêches pour la Méditerranée. Report of the sixteenth session of the Scientific Advisory Committee. St. Julian’s, Malta, 17–20 March 2014/Rapport de la seizième session du Comité scientifique consultatif. Saint Julien, Malte, Malte, 17-20 mars 2014. FAO Fisheries and Aquaculture Report/FAO Rapport sur les pêches et l’aquaculture. No. R1102. Rome. 2015. 250 pp. https://www.fao.org/3/i4381b/i4381b.pdf |
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