The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea
The fecundity characteristics and spawning strategy of <i>Uroteuthis edulis</i> in the East China Sea were investigated by observing the potential fecundity (<i>PF</i>), relative fecundity by dorsal mantle length (<i>PF<sub>ML</sub></i>) and relative f...
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MDPI AG
2023-09-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/13/17/2786 |
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| author | Rongpei Guo Nan Li Zhou Fang |
| author_facet | Rongpei Guo Nan Li Zhou Fang |
| author_sort | Rongpei Guo |
| collection | DOAJ |
| description | The fecundity characteristics and spawning strategy of <i>Uroteuthis edulis</i> in the East China Sea were investigated by observing the potential fecundity (<i>PF</i>), relative fecundity by dorsal mantle length (<i>PF<sub>ML</sub></i>) and relative fecundity by body weight (<i>PF<sub>BW</sub></i>). 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 <i>PF</i>, <i>PF<sub>ML</sub></i> and <i>PF<sub>BW</sub></i> 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 <i>PF<sub>BW</sub></i> was more stable than the <i>PF<sub>ML</sub></i> (<i>δ</i><sup>2</sup><i>PF<sub>BW</sub></i> < <i>δ</i><sup>2</sup><i>PF<sub>ML</sub></i>). The fecundity and single biological indicators were fitted, and it was found that the <i>PF</i> and <i>PF<sub>ML</sub></i> were positively correlated with dorsal mantle length (<i>ML</i>) and body weight (<i>BW</i>). The generalized additive model (GAM) fitting showed that when considering the interaction between dorsal mantle length and sea surface height (M<sub>13</sub>), the deviation explanation rate of the <i>PF</i> and <i>PF<sub>ML</sub></i> was the highest. Studies have shown that the ovary oocytes of <i>U. edulis</i> mature in batches, and then the eggs are laid in batches. The dorsal mantle length (<i>ML</i>), water temperature at 25 m depth (T<sub>25</sub>) and sea surface height (SSH) are important indicators to measure the fecundity of <i>U. edulis</i>. These findings allow for a deeper understanding of the <i>U. edulis</i> population dynamics for the future management of this economically and ecologically important species. |
| first_indexed | 2024-03-10T23:28:54Z |
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| spelling | doaj.art-ade108b87142424bae54182e34e0eba12023-11-19T07:47:23ZengMDPI AGAnimals2076-26152023-09-011317278610.3390/ani13172786The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China SeaRongpei Guo0Nan Li1Zhou Fang2College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Sciences, Shanghai Ocean University, Shanghai 201306, ChinaCollege of Marine Sciences, Shanghai Ocean University, Shanghai 201306, ChinaThe fecundity characteristics and spawning strategy of <i>Uroteuthis edulis</i> in the East China Sea were investigated by observing the potential fecundity (<i>PF</i>), relative fecundity by dorsal mantle length (<i>PF<sub>ML</sub></i>) and relative fecundity by body weight (<i>PF<sub>BW</sub></i>). 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 <i>PF</i>, <i>PF<sub>ML</sub></i> and <i>PF<sub>BW</sub></i> 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 <i>PF<sub>BW</sub></i> was more stable than the <i>PF<sub>ML</sub></i> (<i>δ</i><sup>2</sup><i>PF<sub>BW</sub></i> < <i>δ</i><sup>2</sup><i>PF<sub>ML</sub></i>). The fecundity and single biological indicators were fitted, and it was found that the <i>PF</i> and <i>PF<sub>ML</sub></i> were positively correlated with dorsal mantle length (<i>ML</i>) and body weight (<i>BW</i>). The generalized additive model (GAM) fitting showed that when considering the interaction between dorsal mantle length and sea surface height (M<sub>13</sub>), the deviation explanation rate of the <i>PF</i> and <i>PF<sub>ML</sub></i> was the highest. Studies have shown that the ovary oocytes of <i>U. edulis</i> mature in batches, and then the eggs are laid in batches. The dorsal mantle length (<i>ML</i>), water temperature at 25 m depth (T<sub>25</sub>) and sea surface height (SSH) are important indicators to measure the fecundity of <i>U. edulis</i>. These findings allow for a deeper understanding of the <i>U. edulis</i> population dynamics for the future management of this economically and ecologically important species.https://www.mdpi.com/2076-2615/13/17/2786<i>Uroteuthis edulis</i>East China Seafecunditydorsal mantle lengthbody weight |
| spellingShingle | Rongpei Guo Nan Li Zhou Fang The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea Animals <i>Uroteuthis edulis</i> East China Sea fecundity dorsal mantle length body weight |
| title | The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea |
| title_full | The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea |
| title_fullStr | The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea |
| title_full_unstemmed | The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea |
| title_short | The Fecundity Characteristics and Spawning Strategy of <i>Uroteuthis edulis</i> in the East China Sea |
| title_sort | fecundity characteristics and spawning strategy of i uroteuthis edulis i in the east china sea |
| topic | <i>Uroteuthis edulis</i> East China Sea fecundity dorsal mantle length body weight |
| url | https://www.mdpi.com/2076-2615/13/17/2786 |
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