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10 results for “Mobula”
FIGURE 5 in Dancing with the devil: courtship behaviour, mating evidences and population structure of the Mobula tarapacana (Myliobatiformes: Mobulidae) in a remote archipelago in the Equatorial Mid-Atlantic Ocean
FIGURE 5 | Distinct courtship behaviors of sicklefin devil rays Mobula tarapacana observed in the Saint Peter and Saint Paul Archipelago. A. Female being chased by two males. B. Male overlapping female. C. Male trying to overlap on female. D. Male overlaps the female with two more males chasing. E–F. Sequence of male following female.
FIGURE 3 in Dancing with the devil: courtship behaviour, mating evidences and population structure of the Mobula tarapacana (Myliobatiformes: Mobulidae) in a remote archipelago in the Equatorial Mid-Atlantic Ocean
FIGURE 3 | Female (grey) and male (black) Mobula tarapacana size distribution (disk width- DW, in meters) per month, in the Saint Peter and Saint Paul Archipelago (SPSPA), from December 2008 to June 2016. Red dashed line= size at maturity for males (White et al., 2006); blue dashed line= size at maturity for females (Notarbartolo di Sciara, 1988).
FIGURE 3 in First record of the sicklefin devilray Mobula tarapacana (Myliobatiformes: Mobulidae) from Australian waters
FIGURE 3. Posterior body and base of tail of 3 m disc width male Mobula tarapacana, 12 Mile Reef, Bermagui, New South Wales, Australia showing the shape of the dorsal fin; the elongate depression in the base of the tail (CD); caudal ridge (CR); pelvic fin (Pel); claspers (Cl); and two remora (Re) attached to the underside of the pectoral fin.
FIGURE 1 in First record of the sicklefin devilray Mobula tarapacana (Myliobatiformes: Mobulidae) from Australian waters
FIGURE 1. Left lateral view of 3 m disc width male Mobula tarapacana, 12 Mile Reef, Bermagui, New South Wales, Australia.
FIGURE 2 in First record of the sicklefin devilray Mobula tarapacana (Myliobatiformes: Mobulidae) from Australian waters
FIGURE 2. Left lateral view of the head of Mobula tarapacana, 12 Mile Reef, Bermagui, New South Wales, Australia, showing the species' distinctive dorsal colouration and location of the spiracle above the origin of the pectoral fin. The spiracle appears as an elongated depression extending obliquely upward from the pectoral fin origin beneath a conspicuous dermal ridge.
Genome-wide SNPs detect no evidence of genetic population structure for reef manta rays (Mobula alfredi) in southern Mozambique
Little is known about the extent of genetic connectivity along continuous coastlines in manta rays or whether site visitation is influenced by relatedness. Such information is pertinent to defining population boundaries and understanding localised dispersal patterns and behaviour. Here, we use 3057 genome-wide single nucleotide polymorphisms (SNPs) to evaluate population genetic structure and assess levels of relatedness at aggregation sites of reef manta rays (Mobula alfredi) in southern Mozambique (n = 114). Contrary to indications of limited dispersal along the southern Mozambican coastline inferred from photo identification and telemetry studies, our results show no evidence of population structure (non-significant FST <0.001) for M. alfredi along this coast. We also found no evidence that individuals sampled at the same site were more related than expected by chance for males, females or across both sexes, suggesting kinship may not influence visitation pattern s at these sites. We estimated the effective population size (Ne) of this population to be 375 (95% CI = 369-380). Comparison to a distant eastern Indian Ocean site (Western Australia; n = 15) revealed strong genetic differentiation between Mozambique and Western Australia (FST = 0.377), identifying the Indian Ocean basin as a barrier to dispersal. Our findings show that genetic connectivity in M. alfredi extends for several hundred kilometres along continuous coastlines. We therefore recommend the population in Mozambique be considered a discrete management unit and future conservation plans should prioritize integrated strategies along the entire southern coastline.
FIGURE 4 in Dancing with the devil: courtship behaviour, mating evidences and population structure of the Mobula tarapacana (Myliobatiformes: Mobulidae) in a remote archipelago in the Equatorial Mid-Atlantic Ocean
FIGURE 4 | Mobula tarapacana observed in the Saint Peter and Saint Paul Archipelago. Left panelfemales with evidence of mating scars on pectoral fins. Right panel- males with evidences of mating on the claspers (swollen and/or abraded).
FIGURE 2 in Dancing with the devil: courtship behaviour, mating evidences and population structure of the Mobula tarapacana (Myliobatiformes: Mobulidae) in a remote archipelago in the Equatorial Mid-Atlantic Ocean
FIGURE 2 | Spot patterns used for photo identification of Mobula tarapacana in the Saint Peter and Saint Paul Archipelago (SPSPA).
FIGURE 1 in Dancing with the devil: courtship behaviour, mating evidences and population structure of the Mobula tarapacana (Myliobatiformes: Mobulidae) in a remote archipelago in the Equatorial Mid-Atlantic Ocean
FIGURE 1 | Geographical location of the Saint Peter and Saint Paul Archipelago (SPSPA; black triangle and inset) in the equatorial Atlantic Ocean. Red indicates Mobula tarapacana confirmed occurrences in the Atlantic Ocean (IUCN, 2019), while green squares are known occurrences in Brazilian waters.
Genome-wide SNPs detect no evidence of genetic population structure for reef manta rays (Mobula alfredi) in southern Mozambique
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