Re-description of the growth pattern of four decapod species by information theory

Zambrano, René; Galindo-Cortés, Gabriela

doi:10.1080/07924259.2018.1532929

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…A Gaussian function (k = 6) was used, and the origin of LFD corresponded to the average of 30 histograms. Bandwidth (b) was the mean between the optimal Gaussian bandwidth (Silverman 1986) and the over-smoothed bandwidth (Scott 1992), without considering the LFD as unimodal (Zambrano et al 2018;Zambrano and Galindo-Cortes 2019). The analysis was run in Stata software v16 using routines 'bandw' and 'warpdenm'.…”

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Modal and empirical lengths at sexual maturity for six deep-sea species in Ecuadorian oceanic waters

Zambrano,

Coello,

Herrera

2023

Mar Fish Sci

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The objective of the present work was to establish modal lengths, empirical lengths at sexual maturity, and proportions of mature individuals of six deep-sea species from the bycatch of the experimental fishery for Patagonian toothfish (Dissostichus eleginoides). Fishing was conducted in Ecuadorian oceanic waters by only one vessel, between 2017 and 2021. Modal lengths were identified using frequency distributions. The length at sexual maturity (Lm) was estimated using the empirical equation: Ln Lm = -0.1189 + 0.9157 * Ln (Lmax). Modal lengths presented a little annual increment in Antimora rostrata and Coryphaenoides armatus while the values decreased for Centroscymnus owstonii, C. delsolari, and Hydrolagus melanophasma. Interannual lengths were similar for Etmopterus granulosus. Modal lengths were higher than the sexual maturity length for H. melanophasma, C. delsolari, C. owstonii and A. rostrata. Furthermore, Coryphaenoides armatus showed a similar value and E. granulosus a lower modal length. Empirical length at sexual maturity was between 56.35 and 66.26 cm TL for all species except for H. melanophasma, which was 100.53 cm TL. Antimora rostrata and C. armatus presented an increment of mature individuals while the annual percentage decreased for H. melanophasma, C. owstonii, and C. delsolari. Etmopterus granulosus showed a lower proportion of mature individuals.

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confidence: 99%

Modal and empirical lengths at sexual maturity for six deep-sea species in Ecuadorian oceanic waters

Zambrano,

Coello,

Herrera

2023

Mar Fish Sci

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“…1. Introduction Information theory has been productively utilized in many different biological disciplines including molecular genetics, evolution, neurobiology, and behavioral biology (Bossert, 2018;Zambrano and Galindo-Cortes, 2018). Quastler, 1958 andReza, 1961 may provide an introduction to this subject for biologists unfamiliar with it.…”

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Gompertz Kinetics in Developmental Fields: An Information Theory Approach

Baranowitz¹

2022

Preprint

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A model for cell proliferation in developmental fields is derived from information theory using a few biological postulates. The model provides an explanation for the success of the Gompertz equation in describing the growth of embryonic, neoplastic, and regenerative systems. Although this equation has been applied to many growth phenomena, its use has been entirely empirical. A theoretical justification for the use of the Gompertz equation in characterizing developmental processes is presented. The model also accounts for a reported relationship among the parameters of the Gompertz equation. A method for quantification and comparison of the determination of developmental fields at different levels of organization is suggested.

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ABUNDANCIA DE <i>Ucides occidentalis</i> (OCYPODIDAE) EN UN ÁREA DE MANGLAR DEL GOLFO DE GUAYAQUIL, ECUADOR

Troya-Castro,

Zambrano

2023

Acta biol. Colomb.

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Ucides occidentalis es un cangrejo de importancia pesquera en Ecuador. El objetivo del presente trabajo fue estimar su abundancia en un área de uso y custodia de manglar, en el Golfo de Guayaquil, Ecuador. La abundancia fue representada por la densidad y el tamaño poblacional, determinados conforme el muestreo por distancias utilizando transectos de puntos. Un total de 38 puntos fueron establecidos, basados en un muestreo no-probabilístico de oportunidad. Los individuos fueron recolectados por pescadores locales. Cada cangrejo fue sexado y su talla (i.e., ancho de cefalotórax-AC) registrada con un calibrador Vernier. Se determinó la proporción sexual, talla media, densidad y tamaño poblacional. La proporción sexual indica un número ligeramente superior de hembras (1:1,10). La talla media poblacional fue 7,47 cm AC; los machos presentaron una talla superior (7,69 cm AC) referente a las hembras (7,33 cm AC). La densidad poblacional fue 0,27 ind/m2 y el tamaño poblacional estimado fue de 743670 individuos. La mayor densidad la presentaron las hembras, seguidos de los machos comerciales (> 7,5 cm AC). Los machos no-comerciales (< 0,75 cm AC) tuvieron una abundancia baja (0,03 ind./m2). La proporción sexual difiere entre los reportes previos, lo cual podría relacionarse con la prohibición de capturar hembras en Ecuador, que ocasiona una mayor presión pesquera sobre los individuos machos. La abundancia de U. occidentalis es inferior a lo reportados por otros autores (i.e., 0,61-1,2 ind./m2), lo cual debe ser tomado con cautela debido a las diferencias en las metodologías empleadas.

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Re-description of the growth pattern of four decapod species by information theory

Cited by 3 publications

References 41 publications

Modal and empirical lengths at sexual maturity for six deep-sea species in Ecuadorian oceanic waters

Modal and empirical lengths at sexual maturity for six deep-sea species in Ecuadorian oceanic waters

Gompertz Kinetics in Developmental Fields: An Information Theory Approach

ABUNDANCIA DE <i>Ucides occidentalis</i> (OCYPODIDAE) EN UN ÁREA DE MANGLAR DEL GOLFO DE GUAYAQUIL, ECUADOR

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