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The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea

SIMPLE SUMMARY: As one of the important economic fishery resources in the East China Sea, Uroteuthis edulis has attracted extensive attention from scholars around the world, but there is no relevant research on the fecundity characteristics and spawning strategies of U. edulis in the East China Sea....

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Autores principales: Guo, Rongpei, Li, Nan, Fang, Zhou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10486499/
https://www.ncbi.nlm.nih.gov/pubmed/37685050
http://dx.doi.org/10.3390/ani13172786
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author Guo, Rongpei
Li, Nan
Fang, Zhou
author_facet Guo, Rongpei
Li, Nan
Fang, Zhou
author_sort Guo, Rongpei
collection PubMed
description SIMPLE SUMMARY: As one of the important economic fishery resources in the East China Sea, Uroteuthis edulis has attracted extensive attention from scholars around the world, but there is no relevant research on the fecundity characteristics and spawning strategies of U. edulis in the East China Sea. Therefore, this study takes the fecundity as the starting point to explore the fecundity characteristics and spawning strategies of U. edulis. Our study showed that the ovary oocytes of U. edulis mature in batches, after which the eggs are laid in batches. The dorsal mantle length (ML), water temperature at 25 m depth (T(25)) and sea surface height (SSH) are important indicators to measure the fecundity of U. edulis. The results of this study provide important fecundity information for understanding the population dynamics of U. edulis under the changing marine environment, and have important significance for the sustainable development and utilization of fishery resources. ABSTRACT: The fecundity characteristics and spawning strategy of Uroteuthis edulis in the East China Sea were investigated by observing the potential fecundity (PF), relative fecundity by dorsal mantle length (PF(ML)) and relative fecundity by body weight (PF(BW)). The relationship between fecundity and a single biological indicator was measured, and generalized additive models (GAMs) were fit by adding environmental variables to help better understand this comprehensive relationship. The long diameter and short diameter of the ovarian oocytes ranged from 0.72 mm to 4.74 mm and from 0.46 mm to 3.67 mm, respectively. The long and short diameters of oviducal eggs ranged from 0.61 mm to 5.12 mm and from 0.39 mm to 3.81 mm, respectively. The egg diameter had a unimodal distribution. The PF, PF(ML) and PF(BW) ranged from 540 to 13,743 cells, 5 to 86 cells/mm and 6 to 53 cells/g, respectively. Three fecundity indicators were unimodally distributed, and the PF(BW) was more stable than the PF(ML) (δ(2)PF(BW) < δ(2)PF(ML)). The fecundity and single biological indicators were fitted, and it was found that the PF and PF(ML) were positively correlated with dorsal mantle length (ML) and body weight (BW). The generalized additive model (GAM) fitting showed that when considering the interaction between dorsal mantle length and sea surface height (M(13)), the deviation explanation rate of the PF and PF(ML) was the highest. Studies have shown that the ovary oocytes of U. edulis mature in batches, and then the eggs are laid in batches. The dorsal mantle length (ML), water temperature at 25 m depth (T(25)) and sea surface height (SSH) are important indicators to measure the fecundity of U. edulis. These findings allow for a deeper understanding of the U. edulis population dynamics for the future management of this economically and ecologically important species.
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spelling pubmed-104864992023-09-09 The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea Guo, Rongpei Li, Nan Fang, Zhou Animals (Basel) Article SIMPLE SUMMARY: As one of the important economic fishery resources in the East China Sea, Uroteuthis edulis has attracted extensive attention from scholars around the world, but there is no relevant research on the fecundity characteristics and spawning strategies of U. edulis in the East China Sea. Therefore, this study takes the fecundity as the starting point to explore the fecundity characteristics and spawning strategies of U. edulis. Our study showed that the ovary oocytes of U. edulis mature in batches, after which the eggs are laid in batches. The dorsal mantle length (ML), water temperature at 25 m depth (T(25)) and sea surface height (SSH) are important indicators to measure the fecundity of U. edulis. The results of this study provide important fecundity information for understanding the population dynamics of U. edulis under the changing marine environment, and have important significance for the sustainable development and utilization of fishery resources. ABSTRACT: The fecundity characteristics and spawning strategy of Uroteuthis edulis in the East China Sea were investigated by observing the potential fecundity (PF), relative fecundity by dorsal mantle length (PF(ML)) and relative fecundity by body weight (PF(BW)). The relationship between fecundity and a single biological indicator was measured, and generalized additive models (GAMs) were fit by adding environmental variables to help better understand this comprehensive relationship. The long diameter and short diameter of the ovarian oocytes ranged from 0.72 mm to 4.74 mm and from 0.46 mm to 3.67 mm, respectively. The long and short diameters of oviducal eggs ranged from 0.61 mm to 5.12 mm and from 0.39 mm to 3.81 mm, respectively. The egg diameter had a unimodal distribution. The PF, PF(ML) and PF(BW) ranged from 540 to 13,743 cells, 5 to 86 cells/mm and 6 to 53 cells/g, respectively. Three fecundity indicators were unimodally distributed, and the PF(BW) was more stable than the PF(ML) (δ(2)PF(BW) < δ(2)PF(ML)). The fecundity and single biological indicators were fitted, and it was found that the PF and PF(ML) were positively correlated with dorsal mantle length (ML) and body weight (BW). The generalized additive model (GAM) fitting showed that when considering the interaction between dorsal mantle length and sea surface height (M(13)), the deviation explanation rate of the PF and PF(ML) was the highest. Studies have shown that the ovary oocytes of U. edulis mature in batches, and then the eggs are laid in batches. The dorsal mantle length (ML), water temperature at 25 m depth (T(25)) and sea surface height (SSH) are important indicators to measure the fecundity of U. edulis. These findings allow for a deeper understanding of the U. edulis population dynamics for the future management of this economically and ecologically important species. MDPI 2023-09-01 /pmc/articles/PMC10486499/ /pubmed/37685050 http://dx.doi.org/10.3390/ani13172786 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Guo, Rongpei
Li, Nan
Fang, Zhou
The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title_full The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title_fullStr The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title_full_unstemmed The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title_short The Fecundity Characteristics and Spawning Strategy of Uroteuthis edulis in the East China Sea
title_sort fecundity characteristics and spawning strategy of uroteuthis edulis in the east china sea
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10486499/
https://www.ncbi.nlm.nih.gov/pubmed/37685050
http://dx.doi.org/10.3390/ani13172786
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