Predictions & Data for this entry
| Model: std | climate: MC | migrate: Mo | phylum: |
| COMPLETE = 2.5 | ecozone: MC | food: biCic, biCvf | class: |
| MRE = 0.069 | habitat: 0iMp | gender: D | order: |
| SMSE = 0.009 | embryo: Mv | reprod: O | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| ab | 259.2 | 262.5 | (0.01249) | d | age at birth | FranStev2000, elasmo |
| am | 1.661e+04 | 1.669e+04 | (0.005009) | d | life span | NataMell2002 |
| Lb | 61.6 | 64.47 | (0.04651) | cm | fork length at birth | FranStev2000 |
| Lp | 185 | 200.4 | (0.08329) | cm | fork length at puberty for females | FranStev2000 |
| Lpm | 175 | 195.6 | (0.1175) | cm | fork length at puberty for males | ADW |
| Li | 321 | 360.9 | (0.1245) | cm | ultimate fork length for females | ADW |
| Lim | 272 | 317 | (0.1653) | cm | ultimate fork length for males | guess |
| Wwb | 3530 | 3559 | (0.008193) | g | wet weight at birth | ADW |
| Wwp | 1.1e+05 | 1.069e+05 | (0.02792) | g | wet weight at puberty for females | ADW |
| Wwpm | 9.25e+04 | 8.88e+04 | (0.03998) | g | wet weight at puberty for males | ADW |
| Wwi | 6.171e+05 | 6.247e+05 | (0.01234) | g | ultimate wet weight | fishbase |
| Wwim | 3.676e+05 | 3.78e+05 | (0.02841) | g | ultimate wet weight | fishbase |
| Ri | 0.01096 | 0.01094 | (0.001846) | #/d | maximum reprod rate | ADW |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| tL_f |   | time since birth | fork length | (0.06937) | NataMell2002 |
| tL_m | | time since birth | fork length | (0.08853) | NataMell2002 |
| tL_e |  | age | embryo fork length | (0.197) | FranStev2000 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Lamna nasus | Unit | Description |
|---|---|---|---|---|
| v | 0.02 | 0.06286 | cm/d | energy conductance |
| kap | 0.8 | 0.8694 | - | allocation fraction to soma |
| kap_R | 0.95 | 0.95 | - | reproduction efficiency |
| p_M | 18 | 39.74 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 0.002 | 1/d | maturity maint rate coefficient |
| kap_G | 0.8 | 0.8015 | - | growth efficiency |
Discussion
- Males are assumed to differ from females by {p_Am} and E_Hp only
- Mean temperature set at 12.9 C, based on FranStev2000, but body temperature might be higher, see F3
- Since max ovum diameter is 6 mm, see F4, start of feeding (so birth) is around very early, and tLe data is treated as foetal
- mod_1: males have equal state variables at b, compared to females
Facts
- length-weight: Ww in g = 8.9125e-3 * (FL in cm)^3.128; for embryos:1.91e-5*(FL in cm)^2.916 (Ref: FranStev2000)
- length-length in cm: FL = -0.567 + 0.881 * TL (Ref: FranStev2000)
- Endothermic, oophagous, as developing embryos feed on fertilized eggs to get nutrients once the yolk sac is depleted (Ref: ADW)
- Ova diameter 1.5-4.7 mm. Small embryos have fang-like functional teeth that tear open egg capsules to release the contained ova. The fangs are shed at FL 34-38 cm. The weight of yolk in the stomach peaks at 30-42 cm FL, and accounts for up to 0.81 of total body weight. Waste products of yolk digestion accumulate steadily in the spiral valve throughout gestation, and the liver reaches its maximum size in near-term embryos as excess energy from yolk digestion is stored for postnatal use. (Ref: FranStev2000)
Bibliography