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Age estimation and growth of striped dolphins Stenella coeruleoalba stranded along the coasts of south-western Italy

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Pages 417-424 | Received 03 Nov 2020, Accepted 13 Feb 2021, Published online: 26 Mar 2021

Figures & data

Figure 1. Stranding areas (open ovals) of the striped dolphins (Stenella coeruleoalba) examined in this study

Figure 1. Stranding areas (open ovals) of the striped dolphins (Stenella coeruleoalba) examined in this study

Figure 2. Representative tooth sections of Stenella coeruleoalba (ID Sc166277) obtained using different decalcifiers. The sections were obtained from two different teeth of the same individual. (a) Tooth decalcified using RDO; (b) tooth decalcified using 5% acid nitric. The neonatal line (NNL) and GLGs (Ⱶ˧) in dentine are indicated. In (b) one less GLG (n = 12) compared to (a) (n = 13) is visible, probably due to the greater erosion of the pulp cavity. Scale bar = 1600 μm for both figures

Figure 2. Representative tooth sections of Stenella coeruleoalba (ID Sc166277) obtained using different decalcifiers. The sections were obtained from two different teeth of the same individual. (a) Tooth decalcified using RDO; (b) tooth decalcified using 5% acid nitric. The neonatal line (NNL) and GLGs (Ⱶ˧) in dentine are indicated. In (b) one less GLG (n = 12) compared to (a) (n = 13) is visible, probably due to the greater erosion of the pulp cavity. Scale bar = 1600 μm for both figures

Figure 3. Tooth section of Stenella coeruleoalba calf under 1 year old (ID Sc9793). NNL: neonatal line. Scale bar = 1100 μm

Figure 3. Tooth section of Stenella coeruleoalba calf under 1 year old (ID Sc9793). NNL: neonatal line. Scale bar = 1100 μm

Figure 4. Age distribution of Stenella coeruleoalba analyzed here (n = 25) using tooth sections

Figure 4. Age distribution of Stenella coeruleoalba analyzed here (n = 25) using tooth sections

Figure 5. Gompertz growth curves for males of Stenella coeruleoalba. Growth parameters are given in the text

Figure 5. Gompertz growth curves for males of Stenella coeruleoalba. Growth parameters are given in the text
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