Quote:
| Originally Posted by [b Quote[/b] (Finless @ Dec. 04 2003,17:21)] Quote: | Originally Posted by [b Quote[/b] (John Gulliver @ Dec. 04 2003,15:02)]Further to Steve's excellent post, read this: http://www.fishbase.org/Summary....e=nasus
Note especially "Resilience: Very low" and "Red list status".
If the guy keeps taking them up at the present rate, the problem will solve itself. The Cornish population of porbeagles will be wiped out  | John,
Tried to follow the link but was requested to give a password.
Bryan |
OK. Bryan here is what it says:
FishBase name: Porbeagle
Max. size: 350 cm TL (male/unsexed; Ref. 4645); max. published weight: 230.0 kg (Ref. 40637); max. reported age: 30 years
Environment: pelagic; oceanodromous; marine ; depth range 0 - 715 m
Climate: temperate; 2 - 18°C; 72°N - 55°S
Importance: fisheries: commercial; gamefish: yes
Resilience: Very low, minimum population doubling time more than 14 years (K=0.12; tm=5; tmax=30; Fec=1-5)
Distribution:
Gazetteer Amphitemperate. Western Atlantic: Newfoundland, Cananda to New Jersey USA; possibly southern Brazil to Argentina. Eastern Atlantic: Iceland and western Barents Sea to South Africa, including the Mediterranean. Southwest Pacific: Australia and New Zealand. Southeast Pacific: Chile. Antarctic: off South Georgia and Kerguelen Is. Southern Indian Ocean (Ref. 6871).
Diagnosis: Dorsal spines (total): 0-0; Anal spines: 0-0. A stout, spindle-shaped shark with large black eyes, a sharp, conical snout, and small, smooth-edged, narrow teeth with side cusps (Ref. 5578). Dark grey above, white below, without blotches (Ref. 6581); rear tip of 1st dorsal abruptly white (Ref. 5578).
Biology: Most abundant on continental offshore fishing banks but also found far from land in ocean basins and occasionally close inshore (Ref. 247). Found singly and in schools and feeding aggregations (Ref. 247). Feeds on small pelagic schooling fishes, other sharks, and squid (Ref. 5578. Regarded as potentially dangerous to people because of its size and activity but has never or very seldom been indicted in an attack on people or boats (Ref. 247). Utilized fresh, dried/salted and frozen for human consumption; for oil and fishmeal; fins for shak-fin soup (Ref. 247). May be pan-fried and broiled (Ref. 9988)
Red List Status: , Stevens, J. , (Ref. 36508) , A very wide-ranging species (albeit with apparently little exchange between neighbouring populations), but with a low reproductive capacity and high commercial value. Taken both in target and incidental fisheries. Global populations are not proven to have been depleted to a level where they qualify for a Vulnerable status. However, North Atlantic populations have been seriously over-exploited in longline fisheries, although the introduction of management for US and Canadian shark fisheries should reverse the serious decline in this stock. The apparent lack of exchange between populations on each side of the North Atlantic has resulted in separate assessments for the western and eastern stocks.