Download the complete Stock Status Report for Pseudopentaceros richardsoni
Stock distribution and identity
The Pentacerotid Pseudopentaceros richardsoni (Smith 1844) is a southern circumglobal, benthopelagic species inhabiting outer shelf and upper continental shelves as well as seamounts and underwater ridges (100-1000 m) between 0 and 1 000 m depth (Heemstra, 1986). The species inhabits such habitats at e.g. Tristan de Cunha, on the Walvis Ridge and seamounts off South Africa (Southeast Atlantic); south of Madagascar (Western Indian Ocean) as well as in southern Australia, New Zealand and the Southeast Pacific. The potential distribution area in the SEAFO CA and adjacent waters is shown in Figure 1. It is unlikely that the species is abundant south of about 40°S, i.e. in Sub-Area D.
It is known from adjacent areas that adults inhabit the steep and flat hard bottoms down to 800 m on the seamounts and underwater ridges in the open ocean. Eggs, larvae and juveniles are pelagic. Pelagic armourhead recruit to the summit of the seamounts after approximately 4 years of pelagic life and thereafter aggregates.
Figure 1: Potential geographical distribution of P. richardsoniin the SEAFO CA and adjacent waters
Reported retained catches and discards
Starting in 1976, Table 1 presents the historical records of annual catches and bycatches of pelagic armourhead by country, fishing gear and the SEAFO CA Division. The main fishing countries were:
- · Russia that operated with bottom trawlers in the late 1970s and 1993;
- · Ukraine (bottom trawl) fishing in the mid-1990s.
- · Namibia and South Africa ( bottom trawlers) in the mid-1990s;
- · South Korea primarily operating with mid-water trawl in the period 2010-2013.
The higher annual catches were recorded by Russia with 1,273 and 1,000 t in 1977 and 1993, respectively, and by Korea with 688 t in 2010. Spain and Cyprus landed small catches in 2 and 1 years, respectively.
Table1: Reported catches (tonnes) of pelagic armourhead(Pseudopentaceros richardsoni) from the SEAFO CA. Data reported by SEAFO CPs and other flag states reporting to SEAFO, and from FAO.
|Nation||Namibia||Russia||Ukraine||South Africa||Spain||Cyprus||Rep. of Korea|
|Fishing method||BT||BT||BT||BT||BT / LL||BT||MT|
Ret.= retained catch, Dis. = discarded catch
N/F = no fishing
UNK = Unknown
Blank fields = No data available.
*** Provisional (Aug 2014)
FAO= values from FAO
TB = Bottom Trawl
TM = Mid-water Trawl
LL = Longline
Spatial and temporal distribution of fishing
During the period from 2010 to 2013 Korean trawler vessels (Dongsan Ho and/or Adventure) conducted a targeted fishery for pelagic armourhead in the southern and northern parts of the Valdivia Bank, in Division B1 of the SEAFO CA (Figure 1-3).
Figure 1: Spatial distribution of fishing positions and reported catches of pelagic armourhead(P. richardsoni) aggregated to 10km diameter hexagonal cells, 2012
Figure 2: Spatial distribution of fishing positions and reported catches of pelagic armourhead(P. richardsoni) aggregated to 10km diameter hexagonal cells, 2012
Figure 3: Spatial distribution of fishing positions and reported catches of pelagic armourhead(P. richardsoni) aggregated to 10km diameter hexagonal cells, 2011