Journal Article
Reproductive biology and annual reproductive cycles of two sympatric lineages of Bostrychus sinensis with a natural habitat on southeastern coast of China
Wu, H., Wang, H. and Ding, S.
Record Number:
5593
Year:
2021
Journal:
Animal Reproduction Science
Pages:
1-12
Volume:
232
URL:
www.elsevier.com/locate/anireprosci
Abstract:
The two phylogeographic lineages [South China Sea (SCS) lineage and East China Sea (ESC)
lineage] of the four-eyed sleeper (Bostrychus sinensis) occur sympatrically along the southeastern
coast of China, where there is a small percentage of hybrids in a natural habitat. To assess the
mechanism responsible for the incomplete reproductive isolation between the SCS and ECS lineages
of four-eyed sleeper, there was sampling of individuals from the Yueqing Bay from
November 2018 to November 2019 to determine whether there are differences in characteristics
of the reproductive cycles and reproductive biology. The two lineages varied in reproductive
seasonality, body size and shape, and egg number. The SCS lineage spawned annually between
May and August, with the absolute fecundity (AF) of the SCS lineage being 9960 to 39,517 eggs
per female, and there was positive allometric growth of this species. The ECS lineage spawned
annually between June and July, with females producing 4064 to 10,370 eggs per fish and individuals
having an isometric growth pattern. Preliminary results indicated that there was partial
overlap in the spawning season between the two lineages in the sympatric region, which may not
be a primary factor in the incomplete reproductive isolation. Furthermore, the lineage differences
in fecundity and body shape and size may lead to variation in mate choice and reproductive
strategy. The results from this study provide insight into the biology, reproductive strategies, and
speciation of the four-eyed sleepers.
Times Cited:
1
Relevent Species:
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