Sex Ratio, Spawning Cycle, and Size at Maturity of Bluespotted Seabream (Pagrus Caeruleostictus, Val 1987) From the Coast of Ghana

doi:10.32388/qi57y6

Sex Ratio, Spawning Cycle, and Size at Maturity of Bluespotted Seabream (Pagrus Caeruleostictus, Val 1987) From the Coast of Ghana

2024 · doi:10.32388/qi57y6

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⚙ AI-generated summary by claude@2026-07, 2026-07-17 ⓘ

This study analyzed 558 bluespotted seabream from Ghana, finding a male-biased sex ratio, distinct spawning peaks in March/April, and sizes at first maturity of 30.0 cm for females and 27.2 cm for males, indicating protogyny.

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⚙ AI-generated deep summary by claude@2026-07, 2026-07-17 · read from full text ⓘ

This paper investigates sex ratio, spawning cycle, and size at maturity in bluespotted seabream (Pagrus caeruleostictus) from the coast of Ghana, drawing on field observations of the fish population. It reports patterns in how males and females are represented in the sample and how reproductive timing relates to the spawning period and maturity size. A key limitation is that the study’s findings are specific to this geographic context and depend on the sampling and assessment approach described for the Ghana coastline. The paper does not explicitly discuss endometriosis or adenomyosis; it was included in the corpus via a keyword match in the upstream search index.

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Abstract

A reproductive study was carried out on 558 individuals of Bluespotted seabream, _Pagrus caeruleostictus_ from the coast of Ghana, aiming to enhance understanding of some aspects of their reproductive biology. These specimens were sampled monthly and analysed for sex ratio, spawning cycle and size at first maturity. Among the individuals, 391 (70.07%), were males and 167 (29.92%) were females, indicating a skewed sex ratio of 1 female to 1.29 males. Analysis of maturity stages frequency revealed that both male and female individuals was characterized by five distinct stages (I-V). The highest spawning peak for females was in March, whereas the highest spawning peak observed for the males was in April. Additionally, males dominated the larger size classes which confirms the protogynous nature of _P. caeruleostictus_. The size at first maturity was 30.0 cm and 27.2 cm for females and males respectively. From the study, minimum landing size of the species enshrined in Fisheries Regulation of Ghana should be revised. This would enhance the sustenance of the species within the marine waters of Ghana.

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License: CC-BY-4.0