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Blincow KM, Elstner JT, Ben-Aderet N, Bellquist LF, Nosal AP, Semmens BX. Spatial ecology of the Giant Sea Bass, Stereolepis gigas, in a southern California kelp forest as determined by acoustic telemetry. PeerJ 2023; 11:e16551. [PMID: 38144197 PMCID: PMC10740592 DOI: 10.7717/peerj.16551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 11/09/2023] [Indexed: 12/26/2023] Open
Abstract
The fisheries history of the Giant Sea Bass, Stereolepis gigas (Telostei: Polyprionidae), is closely linked to its spatial ecology. Its overharvest is directly associated with formation of spatially distinct spawning aggregations during summer, while its subsequent recovery is hypothesized to be the result of spatially explicit gear restrictions. Understanding the spatial ecology of Giant Sea Bass is a key part of efforts to assess contemporary threats such as commercial harvest and incidental catch by recreational fisheries. In this study, we used acoustic telemetry to characterize Giant Sea Bass space use in the La Jolla kelp forest using an acoustic array that encompasses two marine protected areas (MPAs) and heavily trafficked recreational fishing grounds. Five of the seven fish we tagged remained in the La Jolla array for at least 6 months. Two fish were resident across multiple years, with one fish consistently detected for 4 years. Only one fish was detected in the broader network of regional acoustic receivers, moving north approximately 8 km to Del Mar. Most tagged fish had home ranges and core use areas indicating they spend considerable time outside MPAs, particularly in areas with high recreational fishing activity. During spawning season we detected fish less frequently in the La Jolla array and recorded higher movement rates. While the current MPA network in La Jolla by no means offers complete protection to this fish, it does appear to support long-term persistence of some individuals in a region of exceptionally high recreational fishing pressure.
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Affiliation(s)
- Kayla M. Blincow
- Center for Marine and Environmental Studies, University of the Virgin Islands, St. Thomas, United States Virgin Islands, United States of America
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
| | - Jack T. Elstner
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
| | - Noah Ben-Aderet
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
- California Department of Fish and Wildlife, San Diego, California, United States of America
| | - Lyall F. Bellquist
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
- The Nature Conservancy, San Diego, California, United States of America
| | - Andrew P. Nosal
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
- Department of Biology, Point Loma Nazarene University, San Diego, California, United States of America
| | - Brice X. Semmens
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, United States of America
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Amorim MCP. The role of acoustic signals in fish reproductiona). THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2023; 154:2959-2973. [PMID: 37947394 DOI: 10.1121/10.0022353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 10/18/2023] [Indexed: 11/12/2023]
Abstract
This paper outlines my research path over three decades while providing a review on the role of fish sounds in mate choice and reproduction. It also intends to provide advice to young scientists and point toward future avenues in this field of research. An overview of studies on different fish model species shows that male mating acoustic signals can inform females and male competitors about their size (dominant frequency, amplitude, and sound pulse rate modulation), body condition (calling activity and sound pulse rate), and readiness to mate (calling rate, number of pulses in a sound). At least in species with parental care, such as toadfishes, gobies, and pomacentrids, calling activity seems to be the main driver of reproductive success. Playback experiments ran on a restricted number of species consistently revealed that females prefer vocal to silent males and select for higher calling rates. This personal synthesis concludes with the suggestion to increase knowledge on fish mating signals, especially considering the emerging use of fish sounds to monitor aquatic environments due to increasing threats, like noise pollution.
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Affiliation(s)
- M Clara P Amorim
- Departamento de Biologia Animal, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal and MARE-Marine and Environmental Sciences Centre, Universidade de Lisboa, Lisboa, Portugal
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Anderson AB, Fiuza TMJ, Araujo GS, Canterle AM, Canto LMC, Freitas RHA, Gadig OBF, Floeter SR. A safe haven for potential reproductive aggregations of the critically endangered Brazilian guitarfish (Pseudobatos horkelii). JOURNAL OF FISH BIOLOGY 2021; 99:2030-2034. [PMID: 34402530 DOI: 10.1111/jfb.14880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/30/2021] [Accepted: 08/13/2021] [Indexed: 06/13/2023]
Abstract
Brazilian endemic batoid elasmobranch populations have declined dramatically in the past 40 years due to anthropic activities (e.g., overfishing). The Brazilian guitarfish, Pseudobatos horkelii, included in the IUCN red list of endangered species [Critically Endangered (CR)], has been captured as by-catch by trawling fishing boats to the edge of extinction. Despite governmental conservation initiatives, the species is still caught and commercialized along the Brazilian coast. In this study, the authors report three rare aggregation events for the Brazilian coast of P. horkelii, inside the only nearshore no-entry Brazilian marine protected area. Strategies for its protection are also discussed.
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Affiliation(s)
- Antônio B Anderson
- Laboratory of Ichthyology, Department of Oceanography, Federal University of Espírito Santo, Vitória, Brazil
| | - Thiago M J Fiuza
- Marine Macroecology and Biogeography Laboratory, Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Gabriel S Araujo
- Marine Macroecology and Biogeography Laboratory, Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
- Universidade Federal do Rio de Janeiro, Instituto de Biodiversidade e Sustentabilidade, NUPEM/UFRJ, Avenida São José Barreto, Macaé, Brazil
| | - Angela M Canterle
- Marine Macroecology and Biogeography Laboratory, Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Luiza M C Canto
- Biology of Teleosts and Elasmobranchs Laboratory (LABITEL), Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Renato H A Freitas
- Biology of Teleosts and Elasmobranchs Laboratory (LABITEL), Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
| | - Otto B F Gadig
- Elasmobranch Research Laboratory, São Paulo State University, Campus do Litoral Paulista, Pça. Infante Dom Henrique, São Vicente, Brazil
| | - Sergio R Floeter
- Marine Macroecology and Biogeography Laboratory, Department of Ecology and Zoology, Federal University of Santa Catarina, Florianópolis, Brazil
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