Alfonsino - South East Atlantic|
| Fact Sheet Title Fact Sheet |
| | | Alfonsino - South East Atlantic |
| | Data Ownership | | This document provided, maintained and owned by South East Atlantic Fisheries Organisation (SEAFO) , is part of SEAFO Stock Status Reports data collection. |
| | ident Block | ident Block | | | | Species List: | | Species Ref: en - Splendid alfonsino, fr - Béryx long, es - Alfonsino besugo, ar - عُنقُد طويل, zh - 红金眼鲷 |
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| ident Block Alfonsino - South East Atlantic Aq Res Ident Aq Res Ident Aq Res Ident | fao Div |
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| 47.A.0 | SEAFO division A.0 |
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| 47.A.1 | SEAFO division A.1 |
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| 47.B.0 | SEAFO division B.0 |
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| 47.B.1 | SEAFO division B.1 |
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| 47.C.0 | SEAFO division C.0 |
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| 47.C.1 | SEAFO division C.1 |
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| 47.D.0 | SEAFO division D.0 |
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| 47.D.1 | SEAFO division D.1 |
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| | Aq Res | Biological Stock: Biological Stock Value: Regional
Management Unit: Management Unit Reference Year: 2023
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| 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. |
| | | | | | History Historically the Korean trawl fishery was the only fishery targeting the alfonsino in the SEAFO CA. During the period 2010-2013 the Korean mid-water trawl fishery targeted mainly splendid alfonsino but instead caught mainly pelagic armourhead. During the period 2010-2013 two fishing vessels participated in the fishery activity ended in 2014. In 2019, no fishing activity targeting this species was conducted in SEAFO CA. Although primarily considered as a midwater trawl fishery, 94% of the tows recorded by onboard observers were classified as “Demersal”. Whether or not these trawls were bottom trawls remains uncertain, and this is an issue that still requires clarification. In the SEAFO CA the first stern trawler operated with the following fishing gears (Table 1 and Figs. 1- 4 provide the specifications of the fishing gears): - HAMPIDJAN NET is a bottom otter trawl with two-piece nets of 66 m in length. The head rope is 48 m long; ground rope is 50 m; the height, width and girth of the net are 5.5 m, 30 m and 100 m, respectively. The cod-end mesh size is 120 mm. The ground gear is 50 m in length and 903 kg in weight, and the float is 1,018 kg.
- MANUFACTURED NET is a four-piece net with an overall length of 66.9 m. The lengths of the head rope and ground rope are 59.0 m and 77.9 m, respectively. The height, width and girth of the net are 5.5 m, 200 m and 83 m, respectively. The cod-end mesh size is 120 mm. The ground is 77.9 m in length and the weight of the ground is 2,068 kg. The float is 913.200 kg with the floating rate of 44%.
- MIDWATER NET is 210 m long. The lengths of head rope and ground ropes are 93.6 m. The height and width of the net are 70.0 m and 240-260 m, respectively. The girth of the net is 816 m and the cod-end mesh size is 120 mm.
Table 1. Fishing gear specifications for first stern trawler. | Gear Specifications | HAMPIDJAN NET bottom trawl | MANUFACTURED NET bottom trawl | MIDWATER NET | | Otter board | type | VRS-TYPE | VRS-TYPE | VRS-TYPE | | | material | Steel | Steel | Steel | | | size (mm) | 2,300 x 4,030 | 2,750 x 4,900 | 1,854 x 3,818 | | | weight (kg) | 3,930 | 4,320 | 2,000 | | | under water weight (kg) | 2,619 | 2,473 | 1,145 | | Trawl Net | purpose | bottom fishing (figure1) | bottom fishing (figure2) | mid-water fishing (figure3) | | | net length overall(m) | 66 | 66.9 | 210.0 | | | head rope (m) | 48 | 59.0 | 93.6 | | | ground rope (m) | 50 | 77.9 | 93.6 | | | net height (m) | 5.5 | 5.5 | 70 | | | net width (m) | 30 | 200 | 240~260 | | | net girth (m) | 100 | 83 | 816 | | | mesh size (mm) | 120 | 120 | 120 |
The second Korean vessel was also a stern trawler which operated with two types of fishing gears: a mid-water trawl net; and the bottom trawl net. The gear used for the operation in the SEAFO Convention Area was the mid-water KITE gear. The height of the net’s gate is approximately 50 m, and the total length is around 280 m. When net is settled, it sinks underwater and the sinking depth of the net is controlled by the wire ropes. The upper and lower parts of the bottom trawl net PE Net have attached plastic buoys and rubber balls respectively. As in the case of KITE gear the wire ropes control the sinking depth of the settled gear. Habitat Bio Climatic Zone: Temperate. Bottom Type: Unspecified. Depth Zone: Slope 200 1000m. Horizontal Dist: Oceanic. Vertical Dist: Demersal/Benthic. Alfonsino is a benthopelagic species that has a global distribution and been reported from all tropical and temperate oceans (excluding northeast Pacific and Mediterranean Sea) between latitudes of about 65° N and 43° S. It occurs from depths of about 25 m to at least 1300 m (Busakhin 1982). In the Atlantic Ocean the species occurs in both the western (Gulf of Maine to Argentina) and eastern Atlantic (from the coast off Spain to South Africa; Fig. 10). Adults inhabit the outer shelf (180 m) and slope to at least 1,300 m depth probably moving further from the bottom at night but ascending to feed in midwater during the night; often found over seamounts and underwater ridges. The species is oviparous, spawning in batches. Eggs, larvae and juveniles are pelagic.  | Figure 1. The distribution of Alfonsino (B. splendens) (source: FishBase).  |
Water Area Overview Spatial Scale: Spatial Scale Water Area Overview  | | Water Area Overview Alfonsino - South East Atlantic
| fao Div | 47.A.0: SEAFO division A.0 | | 47.A.1: SEAFO division A.1 | | 47.B.0: SEAFO division B.0 | | 47.B.1: SEAFO division B.1 | | 47.C.0: SEAFO division C.0 | | 47.C.1: SEAFO division C.1 | | 47.D.0: SEAFO division D.0 | | 47.D.1: SEAFO division D.1 |
| | | | | | Water Area Overview |
Water Area OverviewAlfonsino - South East Atlantic Aq Res Struct Biological Stock: Biological Stock Exploit Table 2 presents Alfonsino catches by country, as well as fishing gear and the sub-divisions in which the catch was taken. The main fishing countries worked in the area included Russia (bottom trawl) in the late 1970s, Ukraine in the mid-1990s, Russia (bottom trawl), Norway (bottom trawl), Spain (MWT /BLL), Poland and Namibia (bottom trawl) in the late 1990s, and South Korea (mid-water trawl) for 4 years from 2010 to 2013, respectively, 198 tonnes, 196 tonnes, 172 tonnes and 1.6 tonnes. Historically the highest catches of the fish were recorded by Russia with 2,972 and 2,800 tons in 1977 and 1997 respectively, Poland 1,964 tonnes in 1995, and Norway 1,066 tons in 1998 in the SEAFO CA. Table 2a. Catches (tonnes) of Alfonsino (B. splendens) made by various countries. | Flag State | Namibia | Namibia | Norway | Russia | Portugal | Ukraine | Korea | | Fishing method | Bottom trawl | Bottom trawl | Bottom trawl | Bottom trawl | Bottom trawl | UNK | Mid-water trawl | | Management Area | B1 | C0 | C1 | A1 | UNK | UNK | UNK | B1 | | Catch details (t) | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | | 1976 | | | N/F | N/F | | | 252# | | | | | | | | | 1977 | | | N/F | N/F | | | 2972# | | | | | | | | | 1978 | | | N/F | N/F | | | 125# | | | | | | | | | 1993 | | | N/F | N/F | | | | | | | 172 | | | | | 1994 | | | N/F | N/F | | | | | | | | | | | | 1995 | 1# | | N/F | N/F | N/F | N/F | | | | | | | | | | 1996 | 368 | | N/F | N/F | N/F | N/F | | | | | 747 | | | | | 1997 | 208 | | N/F | N/F | 836 | | 2800 | | | | 392 | | | | | 1998 | N/F | N/F | N/F | N/F | 1066 | | 69§ | | | | | | | | | 1999 | 1 | | N/F | N/F | N/F | N/F | | | 3§ | | | | | | | 2000 | <1 | | N/F | N/F | 242 | | | | 1§ | | | | | | | 2001 | 1 | | N/F | N/F | N/F | N/F | | | 7§ | | | | | | | 2002 | 0 | | N/F | N/F | N/F | N/F | | | 1§ | | | | | | | 2003 | 0 | | N/F | N/F | N/F | N/F | | | 5§ | | | | | | | 2004 | 6 | | N/F | N/F | N/F | N/F | 210 | | | | | | | | | 2005 | 1 | | N/F | N/F | N/F | N/F | 54 | | | | | | | | | 2006 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | <1 | | | | | | | 2007 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2008 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2009 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2010 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | 159 | 0 | | 2011 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | 165 | 0 | | 2012 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | 172 | 0 | | 2013 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | 13 | 0 | | 2014 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2015 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2016 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2017 | N/F | N/F | <1 | <1 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2018 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2019 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2020 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2021 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2022 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2023 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F = No Fishing. Blank fields = No data available. UNK = Unknown. # = Values taken from the Japp (1999). § = Values from FAO. Ret.= Retained catch. Dis. = Discarded catch. Table 2b. Catches (tonnes) of Alfonsino (B. splendens) made by various countries. | Nation | Spain | Poland | Cook Island | Mauritius | Cyprus | South Africa | | Fishing method | Mid-water trawl and Longlines | UNK | Bottom trawl | Bottom trawl | Bottom trawl | Bottom trawl | | Management Area | UNK | UNK | UNK | UNK | UNK | B1 | | Catch details (t) | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | Ret. | Dis. | | 1976 | | | | | | | | | | | | | | 1977 | | | | | | | | | | | | | | 1978 | | | | | | | | | | | | | | 1993 | | | | | | | | | | | | | | 1994 | | | | | | | | | | | | | | 1995 | | | 1964§ | | | | | | | | 60# | | | 1996 | | | | | | | | | | | 109# | | | 1997 | 186§ | | | | | | | | | | 124# | | | 1998 | 402§ | | | | | | | | | | | | | 1999 | | | | | | | | | | | | | | 2000 | | | | | | | | | | | | | | 2001 | 2 | | | | | | | | | | | | | 2002 | | | | | | | | | | | | | | 2003 | 2 | | | | | | | | | | | | | 2004 | 4 | | | | 142 | | 115 | | 437 | | | | | 2005 | 72 | | | | | | | | | | | | | 2006 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2007 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2008 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2009 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2010 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2011 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2012 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2013 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2014 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2015 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2016 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2017 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2018 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2019 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2020 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2021 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2022 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | | 2023 | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F | N/F = No Fishing. Blank fields = No data available. UNK = Unknown.# = Values taken from the Japp (1999). § = Values from FAO. Ret.= Retained catch. Dis. = Discarded catch. Bio Assess It should be recognized that the data available for assessment is extremely sparse and represents a short time series. The perception of the stock as described is based on only 3 years of catch and effort data. Length frequency distributions could not be derived based on the insufficient length samples submitted to the Secretariat. Catch and effort data per haul on Alfonsino were collected by Korean vessels for only 3 years from 2010 to 2012. These data, although short in series, can be used to get a perception of the trend in nominal CPUE. Data The data used to calculate CPUE of Alfonsino were derived from fishing hauls in which the total catch of Beryx splendens represented more than 80% of the total combined catch per set of P. richardsoni and Beryx splendens caught by Korean trawls around the Valdivia Bank. This criterion is used since the catches of these two species are negatively correlated, i.e. when one of these two species occurs in the haul the other is usually very low. In each haul the estimate of CPUE of Beryx splendens is represented as the ratio of total catch of the species by the haul duration time. Assess Models Type: Others Nominal CPUE was used to derive a perception of the development of the fishery in the period 2010-2012. Length data and frequency distribution Data Using the data collected by Korean trawl fisheries between 2010 and 2013, the length frequency distributions were analysed (Table 3 and Fig. 7). The catch landing data in 2013 were not enough to represent the situation of the southern area of Division B1. The length of Alfonsino in the southern area of Division B1 was the largest with average 26.5 cm and 28.0 cm at the 3rd quartile, with two modes at 22 cm and 27 cm in 2011. In the southern area of Division B1 the length of the fish was also the largest in 2011 and reached about 50 cm fork length. No trend appeared in 2012 (May-June) due to paucity of samples (23 samples). Overall length trends between the areas during 2012-2013 were asymmetric. The length of the species in the northern part was larger than that of southern part in 2012 and 2013. Table 3. Results of length composition of Alfonsino collected by Korean vessels in SEAFO CA (B1) (2010-2013). | | 2010 | 2011 | 2012 (5~6) 2012(11) | 2013 | | | South | North | South | North | South | North | South | North | South | North | | No. of samples | 200 | 841 | 174 | 593 | 514 | 23 | 77 | - | 97 | 5 | | Minimum length | 19.0 | 17.0 | 20.0 | 15.0 | 17.0 | 26.0 | 24.0 | - | 17.0 | 25.0 | | Maximum length | 42.0 | 47.0 | 50.0 | 48.0 | 34.0 | 35.0 | 39.0 | - | 31.0 | 34.0 | | Average length | 25.8 | 24.8 | 26.5 | 27.8 | 24.8 | 31.0 | 31.5 | - | 23.7 | 27.4 | | Median length | 25.0 | 24.0 | 25.0 | 28.0 | 25.0 | 32.0 | 32.0 | - | 22.0 | 26.0 | | 1stquartile length | 23.0 | 22.0 | 23.0 | 25.0 | 23.0 | 30.0 | 29.0 | - | 21.0 | 25.0 | | 3rdquartile length | 27.0 | 26.0 | 28.0 | 31.0 | 26.0 | 32.5 | 34.0 | - | 27.0 | 27.0 | | Average depth (m) | 210.9 | 211.1 | 229.6 | 238.4 | 323.8 | 288.5 | 248.2 | - | 250.0 | 265.1 |  | | Figure 7. Fork length distribution of Alfonsino (Beryx splendens) by depth for 2010-2013. (Red dot represents length samples from the Northen Area and the blue dots represent length samples from the Southern Area) |
 | | Figure 8. The number of individuals of Alfonsino sampled per haul over the period 2010 to 2013 in the SEAFO CA. Data from Observer Reports submitted to SEAFO. |
Table 4. Number of hauls by year, minimum and maximum number of individuals per set and the number of individuals sampled between 2010 to 2013 in the SEAFO CA. | Year | No. of Sets Observed | Mean Individuals | Min. Individuals | Max. Individuals | Mean sample size/tonnes | | 2010 | 7 | 17.429 | 10 | 25 | 0.92 | | 2011 | 7 | 19.143 | 5 | 75 | 1.36 | | 2012 | 29 | 7.345 | 1 | 16 | 0.06 | | 2013 | 7 | 3.143 | 1 | 7 | 1.94 | Length-weight relationships Figure 9 shows the length and weight relationship of Alfonsino for 2010-2013. Two parameters of the length-weight relationship were 0.022 for α and 3.010 for β of combined sex of Alfonsino.  | | Figure 9. Relationship between length and weight of Alfonsino (B. splendens) in the SEAFO CA for 2010-2013. |
Age data and growth parameters The maximum observed age of Alfonsino in the Guinean Gulf was 20 years. The growth parameters of Alfonsino were estimated as K=0.097 year^-1, Linf=48 cm, and t0=-3.08 year^-1 using the specimens from Guinean Gulf (López-Abellán et al. 2008). Reproductive parameters The reproductive parameters of Alfonsino were analysed as follows. Spawning season was evaluated as the period from November to February (Nova Caledonia). Length at 1 st maturity was estimated as fork length 39.67 cm for females (95% c.i.=39.34, 40.02 cm) and 36.88 cm for males (95% c.i.=36.45, 37.36 cm) (Flores et al. 2012). Fecundity was calculated as 270,000–650,000 eggs (source: FishBase). The biological productivity of B. splendens is likely to be moderate to low in general (Anonymous, 2007). Alfonsinos are serial spawners and reproduce in the areas that they normally inhabit. Average size at sexual maturity appears to be about 30–34 cm (4–6 years old), and can vary between localities (González et al. 2003). The annual numbers and proportion of the fish by gonad maturity stage by Korean trawl fisheries during the period of 2010-2013 are presented in Table 6 and Figure 9. Time of spawning also varies markedly between seasons. The proportion of immature fishes was 99.4%, 91.4%, 98.6% and 97.1% in 2010, 2011, 2012 and 2013, respectively. The fish, which is in pre-spawning and spawning gonad stages, appeared from October indicating that the spawning season may start from sometime after October. To get more accurate reproduction results of Alfonsino in the SEAFO Area, there is a need to collect data for a few more years. Table 5. Annual number of fish by maturity stages of Alfonsino (B. splendens) in the SEAFO CA for 2010 to 2013. | Year | Month | Maturity stage | | Immature | Developing | Pre-spawning | Spawning | Spent | | 2010 | Sep | 882 | 66 | 6 | 0 | 0 | | Oct | 33 | 6 | 0 | 0 | 0 | | Nov | 0 | 20 | 0 | 0 | 0 | | 2011 | Jan | 95 | 239 | 0 | 0 | 0 | | Sep | 37 | 1 | 0 | 0 | 0 | | Oct | 18 | 20 | 12 | 0 | 0 | | Nov | 26 | 77 | 34 | 2 | 0 | | 2012 | May | 16 | 7 | 0 | 0 | 0 | | Jun | 452 | 32 | 0 | 0 | 0 | | Nov | 29 | 40 | 3 | 5 | 0 | | 2013 | Oct | 42 | 4 | 0 | 0 | 0 | | Nov | 28 | 25 | 3 | 0 | 0 |  | | Figure 10. The proportion of maturity stage of Alfonsino in the SEAFO CA for 2010-2013. (1:immature, 2: developing, 3: pre-spawning, 4: spawning, and 5: spent). |
Natural Mortality There is no available information and data in the SEAFO CA. Feeding and trophic relationships (including species interaction) There is no available information and data in the SEAFO CA. Tagging and migration No tagging and migration studies on Alfonsino have been done in the SEAFO CA. Others Results Ref Point No biological reference points could be determined, and the SC suggests using an empirical Harvest Control Rule (HCR) to regulate the fishery until the data situation is improved. A candidate HCR consists of the average catch of the last three years to which a 20% uncertainty cap is applied. ICES Harvest Control Rules, category 5: Data poor stocks (only landings data). Calculation of average catch for three years (2010-2012) as = (159+ 165+172)/3 =165 And calculation of the catch advise as = 0.8*165 = 132 t Results The progression in CPUE over time showed marked variability and no clear trend as observed in figure 11.  | | Figure 11. Plot of nominal CPUE (Catch in tonnes per hour) for 2010-2012. |
Management Management: Management Advice Alfonsino is a seamount-associated species that form aggregations, and the experience worldwide is that serial depletion of aggregations at different seamounts can happen. In the recent fisheries for the species in SEAFO the fishery was concentrated on a single seamount summit, the Valdivia Bank, where it was mainly a bycatch in the target fishery for pelagic armourhead. The only information available from 2015 is the limited observations from the RV Dr Fridtjof Nansen survey noting that only scattered specimens of the species occurred in the main fishing area. It is also recognized that the last ten year’s interruption in the exploitation has provided potential for recovery of the resource in the main fishing area on Valdivia Bank. There is however not enough information from any source to determine with certainty whether recovery has happened or not happened. The SC however recognized that without future fishery data nor survey information the basis for providing scientific advice will deteriorate. The SC therefore discussed what advisory option would be most appropriate while maintaining the potential for data provision from a fishery. It must also be taken into account that the alfonsino is mainly a bycatch and that the catches will depend on the activity level in the target fishery for armourhead. The SC considered the TAC level advised in 2013 as precautionary at that time. Considering no fishing pressures in the last 10 years and the development of the resource, the SC recommends a TAC of 200 tonnes (status quo) for the SEAFO CA, of which a maximum of 132 tonnes may be taken in Division B1 for 2024. Bibliography Anonymous. “Information describing alfonsino (Beryx splendens) fisheries relating to the South Pacific Regional Fishery Management Organisation (Working Draft, 20 June 2007). SPRFMO-IV-SWG-09.” 2007. Busakhin, S.V. “Systematics and distribution of the family Berycidae (Osteichthyes) in the World Ocean. Journal of Ichthyology 22 (6): 1–21.” 1982. Clark, M., R. O'Driscoll. “Deepwater fisheries and aspects of their impact on seamount habitat in New Zealand. Journal of Northwest Atlantic Fishery Science 31: 441-458.” 2003  http://journal.nafo.int/Portals/0/2003-Vol31/clark.pdf De Lury, D.B. “On the estimation of biological populations. Biometrics, 3: 145–167.” 1947. Fisheries Agency of Japan. “Information describing splendid Alfonsino (Beryx splendens) fisheries relating to the North Western Pacific Regional Fishery Management Organization. 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Hatanaka. “Important fishes trawled off Patagonia. Japan Marine Fishery Resource Research Center, Tokyo. 369 p.” 1986. Paulin, C., A. Stewart, C. Roberts and P. McMillan. “New Zealand fish: a complete guide. National Museum of New Zealand Miscellaneous Series No. 19. 279 p.” 1989. Paxton, J.R. “Berycidae. Alfonsinos. p. 2218-2220. In K.E. Carpenter and V.H. Niem (eds.) FAO species identification guide for fishery purposes. The living marine resources of the WCP. Vol. 4. Bony fishes part 2 (Mugilidae to Carangidae). FAO, Rome. Rico, V.; Lorenzo, J.M.; González, J.A.; Krug, H.M.; Mendonça, A.; Gouveia, E.; Afonso Dias, M. (2001). Age and growth of the Alfonsino Beryx splendens Lowe, 1834 from the Macronesian archipelagos. Fisheries Research 49: 233–240.” 1999. Rico, V., J.A. Lorenzo, J.A. González, H.M. Krug, A. Mendonça, E. Gouveia, M. Afonso Dias. “Age and growth of the Alfonsino Beryx splendens Lowe, 1834 from the Macronesian archipelagos. Fisheries Research 49: 233–240.” 2001. 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