Hector Toledo-Padilla

Angel Shark Project: Canary Islands

The angelshark, Squatina squatina, is listed as Critically Endangered on the IUCN Red List of Threatened Species, and remaining populations are highly fragmented throughout its historical distribution. The Canary Islands archipelago in the North East Atlantic has been identified as a uniquely large stronghold for the species. In the present study,...

The angelshark, Squatina squatina , is listed as Critically Endangered on the IUCN Red List of Threatened Species and remaining populations are highly fragmented throughout its historical distribution range. The Canary Islands archipelago in the North East Atlantic has been identified as a uniquely large stronghold for the species. In the present s...

Establishing how threatened wildlife are distributed spatially and temporally is essential for effective conservation and management planning. While many shark species are threatened globally, knowledge on sex-specific differences in behaviour and fine-scale habitat use remains limited, hindering the implementation of appropriate conservation actio...

We report the first case of partial albinism in the Critically Endangered angelshark, Squatina squatina. The encounter with this specimen took place while SCUBA diving on the beach of Tufia, located on the east coast of the island of Gran Canaria on 2 April 2021. This is also the first confirmed finding of an albino elasmobranch specimen in the Can...

Desde la Red Nacional de Elasmobranquios (RNE) queremos agradecer el interés, el tiempo y la energía dedicadas a las IV Jornadas de la Red Nacional de Elasmobranquios (JRNE). Queremos agradecer especialmente a los ponentes que de manera desinteresada han dedicado su tiempo, han expuesto sus trabajos y nos han brindado con sus experiencias y conocim...

Breeding programmes have been developed at the Loro Parque Aquarium for the past eight years focusing mainly on zebra sharks Stegostoma tigrinum. These programmes provide the possibility to study the growth of specimens and the relation between age, length and weight. Data obtained from a total of 288 biometric measurements from 24 (12:12:0) specim...

Loro Parque aquarium contributes to the conservation of the zebra shark (Stegostoma fasciatum) through captive breeding programs. Within these programs, food plays a very important role in animal welfare and must be adapted to the requirements of the specimens at every moment of their life. The diet developed varies from 4% BW/day, 7 days/week, 28%...

Loro Parque has had a successful zebra shark, Stegostoma fasciatum (Hermann, 1783), breeding program for five years. Four trained adults are held at the facility and simulated seasonal implantation has resulted in reproductive behaviours. Pre-copulation often resulted in copulation and 18 newborns were hatched in this five-year period time. For the...

A mathematical model that defines the growth rate of the sea urchin Paracentrotus lividus in the natural environment is presented for the first time, using tagging techniques with calcein fluorochrome. The study was conducted in a middle-intertidal rocky platform located in the north of the island of Tenerife by means of tagging a population of sea...