Page 142 - 《水产学报》2025年第11期

邹沁东，等 水产学报, 2025, 49(11): 119311

Spatial and temporal distribution of Sciaenid species in Dachen Island

1*
1,2
2
1
ZOU Qindong , WANG Zhenhua , ZHANG Shouyu , ZHONG Junsheng ,
1
CHENG Xiaopeng , CHEN Yihui 1
1. College of Oceanography and Ecological Science, Shanghai Ocean University, Shanghai 201306, China;
2. Shanghai University Key Laboratory of Marine Animal Taxonomy and Evolution, Shanghai Ocean University,
Shanghai 201306, China

Abstract: The Sciaenid species play essential roles in rocky reef area due to their large quantity of biomass. They are also
important target fishes for the marine ranching programs in coastal area. We explored the temporal and spatial patterns of the
Sciaenid species in the waters around Dachen Island based on data from 4 seasonal bottom trawl surveys in summer (Sep.
2020), autumn (Nov. 2020), winter (Jan. 2021) and spring (Apr. 2021). This study examined 17 640 Sciaenid species individu-
als collected from 21 sites. Biological characteristics of Sciaenid species, including body length, body weight and the develop-
mental stages were statistically analyzed using indices such as resource density, relative importance index and GIS spatial ana-
lysis. Regression analysis was explored to reveal the relationship between the abundance and environmental factors. The res-
ults showed that a total of 11 Sciaenid species were collected over four seasons, with significant seasonal variation in the dom-
inant species and spatial distribution differences between different developmental stages of the same species. The population
density of Sciaenid species was the highest in summer and the lowest in autumn. Pennahia macrocephalus and Larimichthys
polyactis dominanted in summer, the highest abundance of young fishes of the P. macrocephalus and the L. polyactis were
found in the open ocean. Collichthys lucidus dominanted in autumn and winter, the highest abundance of adult fishes were
found in autumn in the reef island area while the highest abundance of juveniles and young fishes were found in winter in the
open ocean. L. crocea were found to be dominant species in spring, the highest abundance of juvenile and young fish were
found in the near estuary area. Regression analysis indicated that temperature and salinity were important environmental factors
influencing the distribution of croakers. Adaptation to temperature and salinity varies between developmental stages of the
same fish species. Our results showed that: ① there were significant regional differences and seasonal dynamics in the local
scale of the Sciaenid species in the Dachen Island area. ② The island sea plays an important role in Sciaenid species early
resource conservation. ③ We speculated that the L. crocea have formed a recruit population in the Dachen Island area. The
study suggest that, for the protection of the early resources of Sciaenid species, the scope of the Dachenyang spawning ground
reserve should be expanded to the near-estuarine area on the basis of the original reserve.
Key words: Sciaenidae; Larimichthys crocea; spatial and temporal distribution; island waters; spatial analysis; Dachen Island
Corresponding author: WANG Zhenhua. E-mail: zh_wang@shou.edu.cn

Funding projects: National Key R & D Program of China (2019YFD0901303, 2018YFD0900905)

https://www.china-fishery.cn 中国水产学会主办 sponsored by China Society of Fisheries
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