Se verificó la ocurrencia de mobulas en el terminal pesquero de Zorritos desde enero a diciembre del año 2015, haciendo énfasis en datos morfométricos correspondientes al ancho (AD) y largo (LD) del disco corporal, peso, sexo, madurez sexual en los individuos machos (tamaño de clásper) y arte de pesca utilizados. 4 especies de mobulas fueron identificadas Mobula. japanica, M. munkiana, M.thurstoni y M. tarapacana. De 355 individuos muestreados la especie más abundante y de mayor tamaño fue M. japanica (83.7%, AD: 1719.8 ± 253.6 mm), seguida por M. munkiana (14.9%, AD: 1104.9 ± 133.5mm). Se dieron 4 únicos reportes de M. thurstoni (1.1%, AD: 1047.5± 190.5mm), y un reporte de M. tarapacana (0.3%, AD: 1047.5 mm). La especie que presentó mayor cantidad de juveniles fue M. japanica (95%). Todos los individuos de M. thurstoni y el único ejemplar de M. tarapacana también se encontraron por debajo de la Longitud mínima de madurez sexual (Lm). Adicionalmente se acompañó en 24 viajes a bordo de embarcaciones pesqueras frente a las costas de Puerto Pizarro, La Cruz, Zorritos y Acapulco. Se logró georeferenciar 26 puntos de avistamiento de mobulas en altamar. El arte de pesca predominante utilizado para la captura de estas especies fue el de cerco y cortina a flote. Las características oceanográficas, geográficas y biológicas que presenta el mar del norte de Perú hacen posible la presencia de las diferentes especies de mobulas.Mobula’s occurrence were identified in the fishing terminal Zorritos from January to December 2015, emphasizing morphometric data like width disc (AD) and long disc (LD), weight, sex, sexual maturity in male individuals (size clasper) and fishing gear used. 4 species of mobulas were identified Mobula japanica, M. munkiana, M. thurstoni and M. tarapacana. 355 individuals were sampled. The most abundant and larger species was M. japanica (83.7% AD: 1719.8 ± 253.6 mm), followed by M. munkiana (14.9% AD: 1104.9 ± 133.5mm), 4 unique reports were given by M. thurstoni (1.1% AD: 1047.5 ± 190.5mm), and an unique report of M. tarapacana (0.3% AD: 1047.5 mm). The species that presented the highest number of juveniles was M. japanica (95%). All individuals of M. thurstoni and the only copy of M. tarapacana also found below the minimum length of sexual maturity (Lm). Additionally, 24 boat trips aboard fishing vessels were completed off the coast of Puerto Pizarro, La Cruz, Zorritos and Acapulco. 26 georeferencing points were reported of mobulas sighting at sea. The predominant fishing gear for catching these species were purse sein and longline. Oceanographic, geographic and biological characteristics of the northern Peruvian sea allow for the presence of different species of mobulas.

Reef manta (Mobula alfredi) populations along the east African coast are poorly studied and likely in decline. Identifying critical habitats for this species is essential for future research and conservation efforts. Dungonab Bay, a marine protected area and UNESCO World Heritage Site in Sudan, hosts the largest known reef manta aggregation in the Red Sea. Here we present approximately two years of passive acoustic telemetry monitoring data collected from 19 individuals and 15 strategically placed receivers. This data is used to quantify long-term residency and seasonal shifts in habitat use in Dungonab Bay. Additionally, acoustic telemetry combined with satellite telemetry was used to simultaneously track three mantas. On average, individual M. alfredi were detected within the array on 39% of monitored days. Detections were recorded throughout the year, though some individuals were occasionally absent from the receiver array for weeks at a time and generalized additive mixed models showed a clear seasonal pattern in detection probability. The highest probabilities occurred in boreal fall (~76% chance of detection) while the lowest occurred in boreal winter (~22%). Modeled biological factors, including sex and wingspan, had no influence on animal presence. Modeled environmental factors such as fraction of moon illuminated, sea surface temperature, and chlorophyll-a concentration were positively correlated with presence. Despite the high residency suggested by acoustic telemetry, satellite telemetry recorded one tagged individual moving at least 84 kilometers to the south towards Port Sudan. Although our satellite and acoustic telemetry data indicate excursions away from Dungonab, these individuals always returned and showed a strong degree of site fidelity. This study adds to growing evidence that M. alfredi are highly resident and site-dependent but display seasonal shifts in habitat selection that are likely driven by resource availability and the oceanographic features within their home range.