| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| ANIMALIA | CHORDATA | CHONDRICHTHYES | RAJIFORMES | RHINOBATIDAE |
| Scientific Name: | Rhinobatos glaucostigma |
| Species Authority: | Jordan & Gibert, 1883 |
| Red List Category & Criteria: | Data Deficient ver 3.1 |
| Year Published: | 2009 |
| Assessor/s: | Bizzarro, J.J. |
| Reviewer/s: | Valenti, S.V. & Fowler, S.L. (Shark Red List Authority) |
|
Justification: Rhinobatos glaucostigma is a poorly known guitarfish, found shallow waters on soft bottoms from shallow, nearshore regions to 112 m depth in the Eastern Central Pacific Ocean. Ranges from Magdalena Bay, Baja California Sur, Mexico, to Ecuador, including the Gulf of California. Caught in artisanal gillnet fisheries in Sonora and Sinaloa, Mexico, especially during spring and summer months when reproductive aggregations occur in shallow nearshore and insular waters.Almost nothing is known about the biology of this species, its population size or status and it is assessed as Data Deficient at present. Significant declines have been documented in other guitarfish where they are heavily fished and this species could also prove to be threatened. |
|
| Range Description: | Eastern central and southeast Pacific: ranges from Magdalena Bay, Baja California Sur, Mexico (Galvan 2000) to Ecuador (Amezcua-Linares 1996), including the Gulf of California (McEachran 1995). |
| Countries: |
Native:
Colombia; Costa Rica; Ecuador; El Salvador; Guatemala; Honduras; Mexico; Nicaragua; Panama
|
| FAO Marine Fishing Areas: |
Native:
Pacific – southeast; Pacific – eastern central
|
| Range Map: | Click here to open the map viewer and explore range. |
| Population: | Unknown. |
| Population Trend: |
Unknown
|
| Habitat and Ecology: | Found in tropical waters over soft bottom (Beebe and Tee-Van 1941), from shallow, nearshore regions to 112 m depth (Amezcua-Linares 1996). The maximum total length recorded for this species is 89 cm (total length) (Bizzarro et al. 2007). Reproduction is aplacental viviparous. |
| Systems: | Marine |
| Major Threat(s): | Caught by smallscale, artisanal gillnet fisheries off Bahia de Navidad, Mexico (Godınez-Domınguez et al. 2000). Caught in artisanal gillnet fisheries in Sonora and Sinaloa, Mexico, especially during spring and summer months in association with reproductive aggregations in shallow nearshore and insular waters (Bizzarro et al. 2007). Also reported in landings from Baja California Sur. Whereas R. productus is the dominant guitarfish in Sonora landings, R. glaucostigma replaces this species in coastal waters and in artisanal fisheries landings of Sinaloa (Bizzarro et al. 2007). |
| Conservation Actions: | None in place. |
| Citation: | Bizzarro, J.J. 2009. Rhinobatos glaucostigma. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 24 May 2012. |
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