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Table 2 Growth parameters estimated by nonlinear least squares fit of the von Bertalanffy function of Anomalocardia brasiliana and Diplodonta punctata populations

From: Population dynamics of two suspension-feeding bivalves on a sheltered beach in southeastern Brazil

Parameter

Anomalocardia brasiliana

Diplodonta punctata

Mean (±SE)

P

Mean (± SE)

P

L (mm)

37.62 (±3.70)

0.000

18.48 (±2.55)

0.000

K (year−1)

0.71 (±0.15)

0.000

1.10 (±0.43)

0.016

C

0.85 (±0.17)

0.000

0.39 (±0.19)

0.048

WP

0.41 (±0.03)

0.000

0.20 (±0.11)

0.076

T 0 (year)

0.01 (±0.04)

0.767

−0.16 (±0.12)

0.177

R

0.98

 

0.96

 

Φ′

3.00

 

2.58

 

Smallest (mm)

2.52

 

2.82

 

Largest (mm)

36.57

 

19.24

 

t max (year)

2.64

 

1.63

 
  1. L asymptotic length; K curvature parameter; C constant for the amplitude of seasonal oscillation of growth; WP point of lowest growth rate in the year; T 0 theoretical age at length 0; r correlation coefficient; Φ′ standard growth index (Pauly and Munro 1984); t max life span