Sexual and mating system in Thor hainanensis (Decapoda: Natantia: Thoridae) from the Lakshadweep Archipelago, India

We tested the hypothesis that the Hainan’s squat shrimp Thor hainanensisXu & Li, 2014 undergoes a sex change and displays protandric hermaphroditism, a well-known feature from other congeners (T. dicaprioAnker & Baeza, 2021 and T. amboinensis (De Man, 1888)). We used morphological traits ind...

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Bibliographic Details
Published in:Journal of crustacean biology 2023-09, Vol.43 (3), p.1
Main Authors: Jose, Sheena, Prakash, Sanjeevi, Ajith Kumar, Thipramalai Thangappan, Sarkar, Uttam Kumar
Format: Article
Language:English
Subjects:
Aquatic crustaceans
Archipelagoes
Congeners
Crustaceans
Females
Grasping
Hermaphroditism
Males
Marine crustaceans
Mating behavior
Population changes
Protandry
Reproduction
Reproductive behaviour
Sex reversal
Shrimps
Social behavior
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Summary:We tested the hypothesis that the Hainan’s squat shrimp Thor hainanensisXu & Li, 2014 undergoes a sex change and displays protandric hermaphroditism, a well-known feature from other congeners (T. dicaprioAnker & Baeza, 2021 and T. amboinensis (De Man, 1888)). We used morphological traits indicative of male function to categorize shrimp as prehensile males, non-prehensile males, and females. The linear relationship among the different morphological characters and the sexual morphs revealed that T. hainanensis has a sexual system of partial protandric hermaphroditism, where 50% of the population stays as active males and the rest of the population changes to female. Observations on the social and mating behaviour suggest that T. hainanensis exhibits a ‘search and defend’ mating system unlike other tropical caridean shrimps featuring protandrous hermaphroditism.
ISSN:0278-0372
1937-240X
DOI:10.1093/jcbiol/ruad036