What do we know about Cassis tuberosa (Mollusca: Cassidae), a heavily exploited marine gastropod?

Dias, Thelma Lúcia Pereira; Mota, Ellori Laíse Silva; Duarte, Rafaela Cristina de Souza; Alves, Rômulo Romeu Nóbrega

doi:10.15451/ec2017-08-6.16-1-13

Ethnobio Conserv

2017

DOI: 10.15451/ec2017-08-6.16-1-13

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What do we know about Cassis tuberosa (Mollusca: Cassidae), a heavily exploited marine gastropod?

Thelma Lúcia Pereira Dias

Ellori Laíse Silva Mota

Rafaela Cristina de Souza Duarte

et al.

Abstract: What do we know about Cassis tuberosa (Mollusca: Cassidae), a heavily exploited marine gastropod? ABSTRACTCassis tuberosa is a key species in reefs and sandy beaches, where it plays an essential role as a predator of sea urchins and sand dollars. Due to the beauty of its shell, it is one of the most exploited species for trade as marine souvenirs throughout its distribution in the Western Atlantic. Despite its ecological importance, there is little available information about population and biological data or … Show more

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2024

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Cited by 2 publications

References 16 publications

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Conservation Consequences of Corallivore Gastropod Predation on Plexaurella grandiflora (Cnidaria: Octocorallia) Populations in Tropical Reefs

Dias Avelino,

Mota,

Gondim

et al. 2024

Ethnobio Conserv

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Octocorals are extremely important animals for forming coral reefs and maintaining life in the marine environment and are widely distributed. The focus species Plexaurella grandiflora is an endemic species from Brazil. It is subject to the most varied external stressors, from ocean surface warming, pollution, damage caused by tourism, and predation by other animals. In this sense, the present study aimed to survey the population characteristics of P. grandiflora in a shallow tropical reef where it occurs in the Northeast of Brazil. Furthermore, we evaluated the stress and damage caused by coral-eating gastropods of the Muricidae family, found associated with colony structure. Through free dives between the years 2016 and 2017, 143 colonies of P. grandiflora were marked and observed, and they were analyzed in their size, supporting substrate, distribution, presence of damage, and impact by coral-eating gastropods. The cataloged colonies were larger than those recognized in the literature and were distributed in aggregate. A total of 85 gastropods of two species (Coralliophila aberrans and Coralliophila salebrosa) were recorded preying on gorgonians. The damage ranged from light to deep, from polyp removal to exposure of the protein axis. Predation occurred predominantly at the base of the colonies. As it is an endemic species and in need of studies, this study warns of the need for studies focused on the ecology and conservation of this gorgonian and its critical habitats.

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Conservation Consequences of Corallivore Gastropod Predation on Plexaurella grandiflora (Cnidaria: Octocorallia) Populations in Tropical Reefs

Dias Avelino,

Mota,

Gondim

et al. 2024

Ethnobio Conserv

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Non-food uses of sharks in southern Bahia, Brazil

Barbosa-Filho,

Siciliano,

Ann Hauser-Davis

et al. 2024

Ethnobio Conserv

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Sharks are a highly threatened group, and the threats these animals face also affect the cultural ways artisanal fisher communities interact with them. Consequently, local knowledge arising from human interactions with these animals also becomes threatened, as well as the potential of fisheries management through ethnoconservation. In this sense, this study examines the dynamics of shark use by fishers in northeastern Brazil. In 2012, data was collected through semi-structured interviews about shark uses applied to 65 traditional fishers who use sharks differently. The ways fishers use these fish are changing mainly because fishers informed an overall reduction in shark catches. Thus, the analysis of their uses comprises a historical-anthropological record, as specific interactions are quickly disappearing. Therefore, the variety of utilitarian connections and changes in shark use patterns over time reveal both ecologic and cultural extinction threats of the traditional shark fisheries in this area. We suggest implementing anthropological and biological studies that aim to contribute to the maintenance of the livelihoods of populations that interact with sharks and seek to guarantee the sustainable exploitation of these animals.

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What do we know about Cassis tuberosa (Mollusca: Cassidae), a heavily exploited marine gastropod?

Cited by 2 publications

References 16 publications

Conservation Consequences of Corallivore Gastropod Predation on Plexaurella grandiflora (Cnidaria: Octocorallia) Populations in Tropical Reefs

Conservation Consequences of Corallivore Gastropod Predation on Plexaurella grandiflora (Cnidaria: Octocorallia) Populations in Tropical Reefs

Non-food uses of sharks in southern Bahia, Brazil

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