Reproductive biology of the bullseye puffer Sphoeroides annulatus: Gonadosomatic index and its suitability for estimating length at maturity

This study aimed to describe updated information on the basic reproductive biology of Sphoeroides annulatus females and potential use of the gonadosomatic index IG as input data to assess length at 50% maturity (L50) and identify the breeding season. From April 2014 to December 2015, 767 females wer...

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Bibliographic Details
Published in:Journal of fish biology 2022-11, Vol.101 (5), p.1119-1133
Main Authors: Salas‐Singh, Carolina, Morales‐Bojórquez, Enrique, Aguirre‐Villaseñor, Hugo
Format: Article
Language:English
Subjects:
Biology
Breeding seasons
Datasets
Females
functional form
Gonadosomatic index
histological analysis
Immunoglobulins
Maturity
maturity phases
New records
Seasonal variations
Seasonality
Seasons
Sexual maturity
sigmoidal model
Spawning
Sphoeroides annulatus
statistical support
threshold value
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Summary:This study aimed to describe updated information on the basic reproductive biology of Sphoeroides annulatus females and potential use of the gonadosomatic index IG as input data to assess length at 50% maturity (L50) and identify the breeding season. From April 2014 to December 2015, 767 females were analysed along the north‐west coast of the Mexican Pacific Ocean. Both immature and mature females were represented in the total length (LT), which ranged from 81 to 440 mm, and the smallest mature female was 92 mm (new record for the species). Gonadal maturity phases were assigned through histological analysis. A IG threshold value Icut was established using the lower whisker value for maturity phase spawning capable (2.06%). The monthly variation of IG supported the annual spawning seasonality, and the presence of reproductively active mature females IG≥Icut coincided with the observed periods with histological data and the peaks for both seasons 2014 and 2015. Also the presence of reproductively inactive IG
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.15174