Oceanic manta rays aggregating near a major population center have far higher injury rates than at an offshore protected area DOI Creative Commons
P. Santiago Domínguez-Sánchez, Aldo A. Zavala‐Jiménez,

Iliana A. Fonseca‐Ponce

et al.

Endangered Species Research, Journal Year: 2024, Volume and Issue: 55, P. 37 - 42

Published: Aug. 26, 2024

The oceanic manta ray Mobula birostris is an Endangered species facing numerous anthropogenic threats that have led to population declines worldwide. Although rays are fully protected in Mexico, this still threatened by bycatch and vessel collisions, which jeopardize the population’s stability recovery. This study compares prevalence types of injuries observed between remote Revillagigedo Archipelago National Park Bahía de Banderas, area high traffic small-scale fisheries Mexico. Using visual censuses photo-identification techniques conducted from 2014 2022 for Banderas 1978 2020 Archipelago, we found significant disparities injury rates 2 regions. overall rate was substantially higher (31.7%) than (5.2%), with a notable proportion attributed causes, particularly collisions fishing gear entanglement. Moreover, severity varied significantly, incidence major Banderas. These findings highlight importance marine areas emphasize critical implementing targeted conservation measures, especially coastal regions maritime activity, safeguard populations further decline. We encourage community stakeholders implement actions urgently preserve vulnerable other inhabited species.

Language: Английский

Preliminary insights into manta ray (Mobula alfredi and M. birostris) population demographics and distribution in South Africa DOI Creative Commons
Morgan Carpenter, Nakia Cullain, Ryan Daly

et al.

Environmental Biology of Fishes, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract Both the reef manta ray, Mobula alfredi and oceanic ray M. birostris , are repeatedly observed in South Africa, yet little is known about distributions of either species. In this study, we collated citizen science observations since 2003 to reveal six areas KwaZulu-Natal (KZN) Eastern Cape provinces, where rays have been sighted across multiple years. Using their unique ventral spot patterning, 184 individuals were photo-identified, comprising 139 45 . Most photo-identified encountered iSimangaliso Wetland Park (IWP) KZN (89%; n = 119) for Aliwal Shoal (48%; 22). We identified 32 new transboundary records 28 also photographed Inhambane Province, Mozambique, demonstrating connectivity, specifically Závora ( 27). One individual traveled times between IWP Závora, totaling 1305 km, another from Pondoland MPA a distance over 600 km. Further, extend southern range Africa by 500 km Mdumbi Beach Port Ngqura, Cape. These collective findings represent Africa’s first in-water assessment aggregations, showing particular be critical habitat movements documented here suggest population one most mobile globally. hope baseline data provided will drive increased research management along coastlines.

Language: Английский

Citations

0
Occurrence of mobulid rays in Northwest Madagascar DOI Creative Commons

Stella Diamant,

Caterina Bosio,

Joshua M. Rambahiniarison

et al.

Environmental Biology of Fishes, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 5, 2025

Language: Английский

Citations

0
Potential nursery area for the endangered oceanic manta ray in the Gulf of California, México DOI
Paul A. Preciado-González, Felipe Galván‐Magaña, James T. Ketchum

et al.

Environmental Biology of Fishes, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

Citations

0
Insights into the visitations of oceanic manta rays at cleaning stations on coral reefs in the Bird's Head Seascape, eastern Indonesia DOI Creative Commons
Edy Setyawan,

Ronald Mambrasar,

Abraham B. Sianipar

et al.

Frontiers in Fish Science, Journal Year: 2024, Volume and Issue: 2

Published: Aug. 16, 2024

The globally endangered oceanic manta ray Mobula birostris is believed to spend significantly more time in the open ocean than coastal areas. Nonetheless, Bird's Head Seascape (BHS) eastern Indonesia hosts a large population of this species (over 850 individuals), frequently sighted at coral reef cleaning stations and forming vital asset for marine tourism region. Despite this, detailed understanding movements habitat use wide-ranging within shallow (< 30 m) ecosystems remains limited. Addressing knowledge gap urgently required sustainable management ray-focused Here, we report results an initial passive acoustic telemetry study investigating by rays. Forty-one rays were acoustically tracked from February 2016 August 2019 array 28 receivers deployed known hypothesized transit points across BHS (including regions Raja Ampat, Fakfak, Kaimana). A total 5,822 detections recorded 16 all tagged individuals, 421 visitation events documented 37 out 41 providing valuable insights into their patterns stations. Tagged individuals detected receiver durations ranging 0.2 427.0 min (mean ± SD = 48 64 min). Notably, 94% during daylight hours (reaching peak noon), underscoring apparent diurnal pattern spent around frequent short-range between adjacent (5–12 km apart), with two-thirds 191 occurring neighboring southern Ampat. repeatedly three which previously only hosting rays, suggesting likely also utilize these Our provides important visitations local stations, will inform effective conservation efforts BHS.

Language: Английский

Citations

2
Insular and mainland interconnectivity in the movements of oceanic manta rays (Mobula birostris) off Mexico in the Eastern Tropical Pacific DOI Creative Commons

Robert Daniel Rubin,

Katherine R. Kumli,

A. Peter Klimley

et al.

Environmental Biology of Fishes, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

Language: Английский

Citations

1
Oceanic manta rays aggregating near a major population center have far higher injury rates than at an offshore protected area DOI Creative Commons
P. Santiago Domínguez-Sánchez, Aldo A. Zavala‐Jiménez,

Iliana A. Fonseca‐Ponce

et al.

Endangered Species Research, Journal Year: 2024, Volume and Issue: 55, P. 37 - 42

Published: Aug. 26, 2024

The oceanic manta ray Mobula birostris is an Endangered species facing numerous anthropogenic threats that have led to population declines worldwide. Although rays are fully protected in Mexico, this still threatened by bycatch and vessel collisions, which jeopardize the population’s stability recovery. This study compares prevalence types of injuries observed between remote Revillagigedo Archipelago National Park Bahía de Banderas, area high traffic small-scale fisheries Mexico. Using visual censuses photo-identification techniques conducted from 2014 2022 for Banderas 1978 2020 Archipelago, we found significant disparities injury rates 2 regions. overall rate was substantially higher (31.7%) than (5.2%), with a notable proportion attributed causes, particularly collisions fishing gear entanglement. Moreover, severity varied significantly, incidence major Banderas. These findings highlight importance marine areas emphasize critical implementing targeted conservation measures, especially coastal regions maritime activity, safeguard populations further decline. We encourage community stakeholders implement actions urgently preserve vulnerable other inhabited species.

Language: Английский

Citations

0