Maximum age (tmax) on record for a species

Maximum age (tmax) on record for a species

• Maximum age (tmax) on record for a species

• Maximum time available for growth and reproduction

• Used as

• proxy for natural mortality M ~ 4.5/tmax
• 1 of 5 criteria to estimate resilience

Longevity as age at 95% of L∞

• Longevity as age at 95% of L∞

Relative size at maturity (Lm / Lmax)

• Relative size at maturity (Lm / Lmax)

• Fish 0.44 (n=530, 95% LCL =0.421, UCL=0.451)
• Marine mammals 0.76 (n=9, LCL=0.716, UCL=0.803)
• Birds 1.0

• Relative age at maturity (tm / tmax)

• Fish 0.24 (n=229, LCL=0.224, UCL=0.253)
• Marine mammals 0.13 (LCL= 0.0913, UCL = 0.198)
• Birds 0.05 (LCL=0.0364, UCL=0.0695)

The largest fish, the Whale shark (Rhincodon typus) needs about 9 years to reach maturity at about 5.5 m and 750 kg, and about 60 years to reach a maximum length of 14 m and 12 tons.

• The largest fish, the Whale shark (Rhincodon typus) needs about 9 years to reach maturity at about 5.5 m and 750 kg, and about 60 years to reach a maximum length of 14 m and 12 tons.

• The fin whale (Balaenoptera physalus) needs about 7 years to reach maturity at a size of about 20 m and about 36 tons, with a maximum size of about 25 m and 70 tons.

Great white shark females take about 12 years to reach maturity at 4.5-5 m and about 0.8 tons; they need 36 years to reach a maximum size of 7.2 m and 3.4 tons;

• Great white shark females take about 12 years to reach maturity at 4.5-5 m and about 0.8 tons; they need 36 years to reach a maximum size of 7.2 m and 3.4 tons;

• Killer whales (Orcinus orca) reach maturity in 6-10 years at 5-6 m length and about 1.8 tons, with the typical size of about 7 m and 3.8 tons reached a few years later.

Because of physics (e.g. gravity), organisms have a ‘bauplan’ or body architecture optimized for a certain average adult size; they maximize their fitness if they reach that size as fast as possible

• Because of physics (e.g. gravity), organisms have a ‘bauplan’ or body architecture optimized for a certain average adult size; they maximize their fitness if they reach that size as fast as possible

• Fish growth is limited by the oxygen-temperature window, and thus they need all their life to reach maximum size

• Birds and mammals do not have this limitation (air breathers with constant body temperature) and reach maximum size early in life

• Gills suck, but they last: bowhead whales reach 130 years, cockatoos 60 years, humans 121 years, turtoise 180 years, fish (kois) > 200 years and Greenland shark 600??

Select one of these species:

• Select one of these species:

• Orange roughy (Hoplostethus atlanticus)
• Beluga (Huso huso)
• Anchoveta (Engraulis ringens)
• Transparent goby (Aphia minuta)

• Discuss age (tmax, tm), habitat, food, growth, reproduction, suitability to fishing

• Use the graphs in FishBase to make your point