Rayas del Mar

https://gofund.me/cd0543b7 thank You.

Shark reference custom search tool and maintenance, organized by Nicolas Straube The Shark reference database is online since 2009 and is running st… Nicolas Straube needs your support for Shark reference custom search tool and maintenance

If You can please help the SR online database. Any contribution Will help. Thank You.
Si está en tus posibilidades por favor colabora con la base de datos en línea de SR. Cualquier aporte es bienvenido. Gracias

Please share, please support our project!

https://www.gofundme.com/shark-reference-custom-search-tool-and-maintenance

Shark reference custom search tool and maintenance

The Shark reference database is online since 2009 and is running stable since providing useful information to the community. It now needs to undergo some maintenance and we would like to use this opportunity to add another tool to the webpage, which allows our users to make full text searches for obtaining customized reference lists – something requested by many users.

However, Shark-references is privately operated without any financial support. For conducting the maintenance and programming the new search tool, we kindly ask for your support. We are aiming at 1000 Euros (1078 USD) in total which would allow us to hire a programmer for the job.

You can donate at our GoFundMe project sharkreftool here:
https://gofund.me/eae282e3

Any contribution is very much welcome!

If we reach the maximum sum, we will keep you updated on the progress and will provide you with the custom search tool in due time.

Fins up,

Jürgen & Nico

Compartimos con ustedes un artículo recién publicado en la revista Journal of Fish Biology. En esta investigación de las mantas y rayas diablo, se combinó los datos de la pesqueria artesanal del estado Nueva Esparta con la ciencia ciudadana a nivel nacional de Venezuela. Esperemos que sea de su agrado y que sobre todo de utilidad en las futuras investigaciones con este género en el Mar Caribe y Atlántico occidental. Salud y a seguirnos cuidando.

Many thanks to Nicolás Ehemann for sharing latest research:

Manta and devil ray species occurrence and distribution in Venezuela, assessed through fishery landings and citizen science data

Nicolás Ehemann, Edilia Acosta-Rodríguez, Alejandro Tagliafico, Nicole Pelletier, Guy Stevens

Abstract

Manta and devil rays (collectively mobulids) belong to the monogeneric Mobulidae, which currently comprises 10 species, including a putative third manta ray species (Mobula cf. birostris). These large planktivorous rays are distributed throughout the tropical and subtropical oceans of the world. To date, six mobulid species are reported for the western Atlantic Ocean and the Caribbean Sea, three of which had previously been reported in Venezuela (Mobula birostris, Mobula tarapacana and Mobula hypostoma). A preliminary assessment of fishery landings and citizen science data was conducted to further the scientific knowledge of mobulid species in Venezuela. Fisheries landing data were collected at Margarita Island between 2006 and 2007, and again in 2014. Data mining of internet search engines and social media platforms spanning the past two decades was also conducted. A total of 117 individuals of five mobulid species were recorded: Mobula sp. (n = 27), M. birostris (n = 36), M. tarapacana (n = 3), Mobula mobular (n = 26), Mobula thurstoni (n = 14) and M. cf. birostris (n = 11). The latter three species are the first confirmation of these species in Venezuela. The authors found no records of the previously reported M. hypostoma during this study. Although the occurrence of M. hypostoma in Venezuela remains possible because of the broad regional range of this species, its current presence in Venezuela is invalidated given the repeated misidentifications which have occurred in previous publications. The results of this study increase the number of reported mobulid ray species in Venezuela to five (excluding M. hypostoma). The overall data from juvenile manta rays and pregnant M. mobular and M. thurstoni recorded in this study, combined with the occurrence of all but one species of mobulid ray found in the western Atlantic Ocean, suggest Venezuela provides important habitat for this threatened family of rays.

Ehemann, N., Acosta-Rodríguez, E., Tagliafico, A., Pelletier, N., & Stevens, G. (2022). Manta and devil ray species occurrence and distribution in Venezuela, assessed through fishery landings and citizen science data. Journal of Fish Biology, 1– 13. https://doi.org/10.1111/jfb.15088

Shark references: https://shark-references.com/species/view/Mobula-birostris

En este artículo se resalta nuevamente la importancia y la utilidad de las colecciones ictiologícas y museos zoológicos para los estudios de taxonomia, sistemática, biodiversidad, distribución geográfica y conservación de los recursos marinos, particularmente de los Batomorfos. Del mismo modo, se destaca la importancia de emplear una taxonomia integrativa en grupos taxonómicos con una alta variabilidad fenotípicas y con variaciones ontogénicas, aprovechando las bondades de las diferentes técnicas disponibles en la actualidad para la taxonomia. Espero disfruten este trabajo. Saludos y a seguirnos cuidando todos.

This study provides morphometric, genetic, taxonomic, and biogeographic information for rogersi (Jordan & Starks, 1895). A complete taxonomic identification was applied to 77 specimens of Urotrygon spp., which are housed and preserved in the two ichthyological collections of Baja California Sur ( ), and to 33 new fresh material specimens. Of all the 110 examined specimens, 48 were morphologically identified as U. rogersi. Of the latter, a subset of samples was selected for DNA taxonomy validation using NADH2 and COI genes. Both mitochondrial markers successfully distinguished U. rogersi from other species.

Many thanks to Nicolás R. Ehemann for this new paper!
This article will be 50 days free Access (kindly provided by the journal) using the following shared link:
https://authors.elsevier.com/a/1eXR-8MvAtuCZH

Ehemann, N.R. & García-Rodríguez, F.J. & De La Cruz-Agüero, J. 2022 Urotrygon rogersi (Myliobatiformes: Urotrygonidae) from the subtropical, provides new biological, genetic, taxonomic, and distribution data for the genus Urotrygon. Regional Studies in Marine Science, 51, Article 102175

https://shark-references.com/species/view/Urotrygon-rogersi

Nuevo artículo que hace una revisión y acervo bibliográfico de las anormalidades, especies y localidades geográficos que han reportado Batomorfos anómalos en el continente americano desde 1959! Ojalá lo disfruten y sea de utilidad. Feliz navidad y próspero 2022

Many thanks to Nicolás R. Ehemann for sharing latest research:

Morphological abnormalities in seven American round ray specimens: A review of America's batomorph anomalies
Nicolás Roberto Ehemann, Francisco Javier García-Rodríguez & José De La Cruz-Agüero

Abstract

Although morphological abnormalities in several rays and skate species around the American continents have frequently mentioned, their numbers are unknown. The present work record morphological abnormalities in four Urotrygonidae species. Two anophthalmic specimens were detected (Urotrygon microphthalmum and Urobatis halleri). Two individuals lacked caudal fins (Urobatis maculatus and Urotrygon chilensis). Two round rays showed incomplete fusion of the pectoral fin to the head (U. microphthalmum and U. chilensis). Vertebral compression and fusion were found in a 6-year-old female Urotrygon rogersi. In addition, 118 abnormal batomorph specimens were gathered from the available bibliography, spanning the last six decades (1959–2021). Amblyraja doellojuradoi was the species with the highest number of abnormalities (18). The most common anomaly was an incomplete fusion of the pectoral fin with the head. Since 2010, at least 30 anomalous batomorphs have been recorded every 5 years. Sixty-nine abnormal specimens occurred in the Northern Hemisphere (1.00–60.00 N). The Cortezian (Pacific) and Southeastern Brazil (Atlantic) marine ecoregions stood out with the highest number of these specimens. Mexico recorded 58 anomalous specimens, followed by Brazil (n = 36). Biological, abiotic and anthropogenic factors are probably the leading causes. However, additional studies are necessary to elucidate these speculations.

Ehemann, N. R., García-Rodríguez, F. J., & Cruz-Agüero, J. D. L. (2021). Morphological abnormalities in seven American round ray specimens: A review of America's batomorph anomalies. Journal of Fish Diseases, 00, 1– 15. https://doi.org/10.1111/jfd.13567

shark references:
https://shark-references.com/species/view/Urobatis-halleri
https://shark-references.com/species/view/Urotrygon-microphthalmum
https://shark-references.com/species/view/Urotrygon-chilensis
https://shark-references.com/species/view/Urobatis-maculatus
https://shark-references.com/species/view/Urotrygon-rogersi
https://shark-references.com/species/view/Amblyraja-doellojuradoi

Morphological abnormalities in seven American round ray specimens: A review of America's batomorph anomalies Although morphological abnormalities in several rays and skate species around the American continents have frequently mentioned, their numbers are unknown. The present work record morphological abnor...

Information shared from tweeter
Espiritu Santo Island has the highest richness among the islands and is important for . By González-González, Cruz-Escalona & colleagues

. Free in Environmental Biology of Fishes until Feb 3.
Enjoy free access to the Editor's Choice article from the December issue of EBFI. Freely available to read until Feb. 3rd

The Espiritu Santo Island as a critical area for conserving batoid assemblage species within the Gulf of California - Environmental Biology of Fishes The Espiritu Santo Island (ESI) has the highest elasmobranch richness among the Gulf of California islands, exemplifying its importance for conservation. In the present study, we assessed the temporal variation of the batoid assemblages captured in the southern ESI. Using the monthly artisanal fishi...