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Use of the SLW index to calculate growth function in the sea cucumber Isostichopus badionotus.

Poot-Salazar A, Hernández-Flores Á, Ardisson PL - Sci Rep (2014)

Bottom Line: In order to address bias produced by body wall elasticity, we compared the performance of four measurements and one compound index that combines different biometric parameters: the square root of the length-width product (SLW).Results showed that variability in length data due to body wall elasticity was controlled by using body length (Le) from the SLW compound index.Growth in I. badionotus follows a negative allometric tendency.

View Article: PubMed Central - PubMed

Affiliation: 1] Departamento de Recursos del Mar, Cinvestav, Carretera Antigua a Progreso km 6, 97310 Merida, Yucatan, Mexico [2] Centro Regional de Investigaciones Pesqueras de Yucalpeten, Instituto Nacional de Pesca, Blvd. del Pescador S/N, Puerto de Abrigo, 97320 Progreso, Yucatan, Mexico.

ABSTRACT
Age and growth analysis is essential to fisheries management. Indirect methods to calculate growth are widely used; however, length frequency data analysis in sea cucumbers is complicated by high data variability caused by body wall elasticity. Here we calculated Isostichopus badionotus parameters of the von Bertalanffy growth function. In order to address bias produced by body wall elasticity, we compared the performance of four measurements and one compound index that combines different biometric parameters: the square root of the length-width product (SLW). Results showed that variability in length data due to body wall elasticity was controlled by using body length (Le) from the SLW compound index. Growth in I. badionotus follows a negative allometric tendency. Slow or zero growth periods were observed during October and November, when weather conditions were adverse.

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Related in: MedlinePlus

Individual growth and relative ages by location of sea cucumber Isostichopus badionotus.Left: seasonalized VBGF (von Bertalanffy growth function) by location in cm yr−1; Right: seasonalized VBGF by location in g yr−1. Relative ages were generated for each Le and GW datum by replacing the growth parameters calculated by ELEFAN I and PROJMAT with their respective values in the seasonalized VBGF, using sub-routines programmed in Wolfram Mathematica 9®. Le: Estimated length; GW: gutted weight.
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f3: Individual growth and relative ages by location of sea cucumber Isostichopus badionotus.Left: seasonalized VBGF (von Bertalanffy growth function) by location in cm yr−1; Right: seasonalized VBGF by location in g yr−1. Relative ages were generated for each Le and GW datum by replacing the growth parameters calculated by ELEFAN I and PROJMAT with their respective values in the seasonalized VBGF, using sub-routines programmed in Wolfram Mathematica 9®. Le: Estimated length; GW: gutted weight.

Mentions: Graphic representations of growth (Figs. 3a and 3b) suggest that sea cucumbers younger than one year in age had Le < 18.9 cm (GW < 151 g) in Celestun, Le < 9.8 cm (GW < 30 g) in Sisal, and Le < 15.3 cm (GW < 56 g) in Progreso. The largest recorded specimens were about five years of age in Celestun (Le > 30 cm and GW > 400 g), ten years of age in Sisal (Le > 35 cm and GW > 700 g), and four years of age in Progreso (Le > 22 cm and GW > 140 g). These results indicate that individuals measured during the study period were older than two years at both Celestun (mean ± SD: 25 ± 4.1 cm and 304.2 ± 158 g) and Progreso (mean ± SD: 20 ± 2.9 cm and 124.1 ± 81.1 g), and older than four years at Sisal (mean ± SD: 26.3 ± 4.8 cm and 350.8 ± 10.2 g).


Use of the SLW index to calculate growth function in the sea cucumber Isostichopus badionotus.

Poot-Salazar A, Hernández-Flores Á, Ardisson PL - Sci Rep (2014)

Individual growth and relative ages by location of sea cucumber Isostichopus badionotus.Left: seasonalized VBGF (von Bertalanffy growth function) by location in cm yr−1; Right: seasonalized VBGF by location in g yr−1. Relative ages were generated for each Le and GW datum by replacing the growth parameters calculated by ELEFAN I and PROJMAT with their respective values in the seasonalized VBGF, using sub-routines programmed in Wolfram Mathematica 9®. Le: Estimated length; GW: gutted weight.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4048913&req=5

f3: Individual growth and relative ages by location of sea cucumber Isostichopus badionotus.Left: seasonalized VBGF (von Bertalanffy growth function) by location in cm yr−1; Right: seasonalized VBGF by location in g yr−1. Relative ages were generated for each Le and GW datum by replacing the growth parameters calculated by ELEFAN I and PROJMAT with their respective values in the seasonalized VBGF, using sub-routines programmed in Wolfram Mathematica 9®. Le: Estimated length; GW: gutted weight.
Mentions: Graphic representations of growth (Figs. 3a and 3b) suggest that sea cucumbers younger than one year in age had Le < 18.9 cm (GW < 151 g) in Celestun, Le < 9.8 cm (GW < 30 g) in Sisal, and Le < 15.3 cm (GW < 56 g) in Progreso. The largest recorded specimens were about five years of age in Celestun (Le > 30 cm and GW > 400 g), ten years of age in Sisal (Le > 35 cm and GW > 700 g), and four years of age in Progreso (Le > 22 cm and GW > 140 g). These results indicate that individuals measured during the study period were older than two years at both Celestun (mean ± SD: 25 ± 4.1 cm and 304.2 ± 158 g) and Progreso (mean ± SD: 20 ± 2.9 cm and 124.1 ± 81.1 g), and older than four years at Sisal (mean ± SD: 26.3 ± 4.8 cm and 350.8 ± 10.2 g).

Bottom Line: In order to address bias produced by body wall elasticity, we compared the performance of four measurements and one compound index that combines different biometric parameters: the square root of the length-width product (SLW).Results showed that variability in length data due to body wall elasticity was controlled by using body length (Le) from the SLW compound index.Growth in I. badionotus follows a negative allometric tendency.

View Article: PubMed Central - PubMed

Affiliation: 1] Departamento de Recursos del Mar, Cinvestav, Carretera Antigua a Progreso km 6, 97310 Merida, Yucatan, Mexico [2] Centro Regional de Investigaciones Pesqueras de Yucalpeten, Instituto Nacional de Pesca, Blvd. del Pescador S/N, Puerto de Abrigo, 97320 Progreso, Yucatan, Mexico.

ABSTRACT
Age and growth analysis is essential to fisheries management. Indirect methods to calculate growth are widely used; however, length frequency data analysis in sea cucumbers is complicated by high data variability caused by body wall elasticity. Here we calculated Isostichopus badionotus parameters of the von Bertalanffy growth function. In order to address bias produced by body wall elasticity, we compared the performance of four measurements and one compound index that combines different biometric parameters: the square root of the length-width product (SLW). Results showed that variability in length data due to body wall elasticity was controlled by using body length (Le) from the SLW compound index. Growth in I. badionotus follows a negative allometric tendency. Slow or zero growth periods were observed during October and November, when weather conditions were adverse.

Show MeSH
Related in: MedlinePlus