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Volume 5
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Population Structure of the Dog Snapper, Lutjanus jocu (Bloch & Schneider, 1801), an Important Fishery Resource in the North of Bahia, Brazil: Influence of Habitat Suitability, Larvae Retention, and Fishing Pressure

by
Glaciane Conceição Marques
1,2,3,
Juliana Beltramin De Biasi
1,2,3,
Carlos Werner Hackradt
3,* and
Fabiana Cezar Félix-Hackradt
2
1
Programa de Pós-Graduação Sistemas Aquáticos Tropicais, Universidade Estadual de Santa Cruz, Campus Soane Soane Nazaré de Andrade, Ilhéus 45662-900, BA, Brazil
2
Campus Sosígenes Costa, Universidade Federal do Sul da Bahia, Porto Seguro 45810-000, BA, Brazil
3
Marine Ecology and Conservation Laboratory, Universidade Federal do Sul da Bahia, Porto Seguro 45810-000, BA, Brazil
*
Author to whom correspondence should be addressed.
Coasts 2025, 5(2), 21; https://doi.org/10.3390/coasts5020021
Submission received: 1 April 2025 / Revised: 29 May 2025 / Accepted: 5 June 2025 / Published: 16 June 2025
Versions Notes

Abstract

The Lutjanidae family includes multiple species highly important to the global fishing industry. In Brazil, approximately 40% of the fishing landings come from a species of this family, the dog snapper, Lutjanus jocu, among the most abundant in the northeast-region fisheries. This study aimed to analyze the genetic diversity and population structure of this species in the states of Bahia and Espírito Santo through the use of microsatellite markers. The dog snapper presented a high genetic variability in the studied populations, with the presence of a distinct population stock in northern Bahia probably driven by habitat suitability, larvae retention, and fishing pressure. The L. jocu sampling sites exhibited an excess of heterozygosity, a low allelic richness, and M-ratio values close to critical levels, probably indicating a recent population decline. Additionally, the low inbreeding indices and high genetic diversity values suggest a significant connectivity and considerably effective population sizes. Although these characteristics may reflect population stability, anthropogenic factors such as habitat loss, fragmentation, and overfishing may pose threats to the sustainability of the species, particularly along the northeastern coast of Brazil.
Keywords: reef fish; microsatellite markers; conservation genetics reef fish; microsatellite markers; conservation genetics

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MDPI and ACS Style

Marques, G.C.; De Biasi, J.B.; Hackradt, C.W.; Félix-Hackradt, F.C. Population Structure of the Dog Snapper, Lutjanus jocu (Bloch & Schneider, 1801), an Important Fishery Resource in the North of Bahia, Brazil: Influence of Habitat Suitability, Larvae Retention, and Fishing Pressure. Coasts 2025, 5, 21. https://doi.org/10.3390/coasts5020021

AMA Style

Marques GC, De Biasi JB, Hackradt CW, Félix-Hackradt FC. Population Structure of the Dog Snapper, Lutjanus jocu (Bloch & Schneider, 1801), an Important Fishery Resource in the North of Bahia, Brazil: Influence of Habitat Suitability, Larvae Retention, and Fishing Pressure. Coasts. 2025; 5(2):21. https://doi.org/10.3390/coasts5020021

Chicago/Turabian Style

Marques, Glaciane Conceição, Juliana Beltramin De Biasi, Carlos Werner Hackradt, and Fabiana Cezar Félix-Hackradt. 2025. "Population Structure of the Dog Snapper, Lutjanus jocu (Bloch & Schneider, 1801), an Important Fishery Resource in the North of Bahia, Brazil: Influence of Habitat Suitability, Larvae Retention, and Fishing Pressure" Coasts 5, no. 2: 21. https://doi.org/10.3390/coasts5020021

APA Style

Marques, G. C., De Biasi, J. B., Hackradt, C. W., & Félix-Hackradt, F. C. (2025). Population Structure of the Dog Snapper, Lutjanus jocu (Bloch & Schneider, 1801), an Important Fishery Resource in the North of Bahia, Brazil: Influence of Habitat Suitability, Larvae Retention, and Fishing Pressure. Coasts, 5(2), 21. https://doi.org/10.3390/coasts5020021

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