Marine reserve effects on population density and size structure of commonly and rarely exploited limpets in South Africa

Nakin, M. D. V.; McQuaid, Christopher D.

doi:10.2989/1814232x.2014.946091

Cited by 20 publications

(26 citation statements)

References 70 publications

(98 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The limited habitat and its easy accessibility to human activity make intertidal and shallow‐water grazers extremely vulnerable to anthropogenic pressures (Nakin & McQuaid, ). Harvesting of intertidal grazers such as topshells and limpets is known to affect negatively the exploited populations by altering their population structure, resulting in a decrease of abundance, and altered size structure (Riera et al, ; Tuya et al, ).…”

Section: Discussionmentioning

confidence: 99%

Disentangling exploitation of the intertidal grazer Phorcus sauciatus (Gastropoda: Trochidae) in an oceanic archipelago: Implications for conservation

et al. 2019

View full text Add to dashboard Cite

Harvesting of intertidal grazers such as topshells is known to affect negatively the exploited populations by altering population structure and decreasing abundance. Phorcus sauciatus has a wide geographic distribution in the North‐eastern Atlantic Ocean and is subject to increasing levels of harvesting pressure due to the expansion of human population on coastal areas. The effect of proximity to human settlements and coastal accessibility on the size structure and abundance of P. sauciatus populations was examined in Madeira archipelago. Mean size, proportion of reproductive individuals, and abundance of this species were generally smaller in areas closer to human settlements and in more accessible coastal areas. Marine protected areas returned the highest mean sizes evidencing their effectiveness in preserving the size structure of this species. The results highlight the necessity to regulate the harvest of P. sauciatus in Madeira archipelago, as well as the implementation of management measures aiming at the sustainable exploitation and conservation of this species, exploited in this region since the early 15th century.

show abstract

Section: Discussionmentioning

confidence: 99%

Disentangling exploitation of the intertidal grazer Phorcus sauciatus (Gastropoda: Trochidae) in an oceanic archipelago: Implications for conservation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Intertidal and shallow-water grazers are extremely vulnerable organisms because of their limited habitat and their accessibility to human activity [50]. Hunter-gatherers have exploited intertidal grazers, since prehistoric times, and there are evidences that the densities and the maximum sizes of several species were reduced by the exploitation [51,52].…”

Section: Harvestingmentioning

confidence: 99%

Marine Snails of the Genus Phorcus: Biology and Ecology of Sentinel Species for Human Impacts on the Rocky Shores

Sousa¹,

Delgado²,

González³

et al. 2018

Biological Resources of Water

View full text Add to dashboard Cite

In this review article, the authors explore a broad spectrum of subjects associated to marine snails of the genus Phorcus Risso, 1826, namely, distribution, habitat, behaviour and life history traits, and the consequences of anthropological impacts, such as fisheries, pollution, and climate changes, on these species. This work focuses on discussing the ecological importance of these sentinel species and their interactions in the rocky shores as well as the anthropogenic impacts to which they are subjected. One of the main anthropogenic stresses that affect Phorcus species is fisheries. Topshell harvesting is recognized as occurring since prehistoric times and has evolved through time from a subsistence to commercial exploitation level. However, there is a gap of information concerning these species that hinders stock assessment and management required for sustainable exploitation. Additionally, these keystone species are useful tools in assessing coastal habitat quality, due to their eco-biological features. Contamination of these species with heavy metals carries serious risk for animal and human health due to their potential of biomagnification in the food chain. Thus, the use of these species as bioindicators is warranted to the establishment of conservation measures targeting marine coastal environments. Climate change increases the level of environmental stress to which intertidal organisms are subjected to, affecting the functioning of biological systems at different levels of organization. Phorcus species have been widely used as indicators of the effect of climate change on local disturbances of intertidal ecosystems and geographic distribution shifts of these organisms. Further studies concerning biological parameters of Phorcus species and how they react to exploitation, pollution, and climate change will consolidate these species as indicators of large-scale ecological impacts of anthropogenic activities.

show abstract

“…Several studies of rocky coastal communities at temperate latitudes have identified limpets as "keystone" grazers [57] and important structuring agents [58] with numerous functions, including roles as herbivores, as prey for higher trophic-level consumers, and as space occupiers that limit the recruitment of other invertebrates [8,10,59]. Limpets are highly vulnerable because of their restricted habitat and easy access to humans [60], threatened by a number of stressors [61] including habitat degradation [62], overfishing [63], pollution and sedimentation [64,65], eutrophication [66], invasive species [67], and climate change [68], among others. These stressors often act simultaneously [61,69].…”

Section: Discussionmentioning

confidence: 99%

Population Characteristics of the Limpet Patella caerulea (Linnaeus, 1758) in Eastern Mediterranean (Central Greece)

Vafidis

Drosou

Dimitriou

et al. 2020

Water

View full text Add to dashboard Cite

Limpets are pivotal for structuring and regulating the ecological balance of littoral communities and are widely collected for human consumption and as fishing bait. Limpets of the species Patella caerulea were collected between April 2016 and April 2017 from two sites, and two samplings per each site with varying degree of exposure to wave action and anthropogenic pressure, in Eastern Mediterranean (Pagasitikos Gulf, Central Greece). This study addresses a knowledge gap on population characteristics of P. caerulea populations in Eastern Mediterranean, assesses population structure, allometric relationships, and reproductive status. Morphometric characteristics exhibited spatio-temporal variation. Population density was significantly higher at the exposed site. Spatial relationship between members of the population exhibited clumped pattern of dispersion during spring. Broadcast spawning of the population occurred during summer. Seven dominant age groups were identified, with the dominant cohort in the third-year class. Significant negative allometric relationships were exhibited between morphometric characteristics. Differences in growth patterns among populations were indicated.

show abstract

Marine reserve effects on population density and size structure of commonly and rarely exploited limpets in South Africa

Cited by 20 publications

References 70 publications

Disentangling exploitation of the intertidal grazer Phorcus sauciatus (Gastropoda: Trochidae) in an oceanic archipelago: Implications for conservation

Disentangling exploitation of the intertidal grazer Phorcus sauciatus (Gastropoda: Trochidae) in an oceanic archipelago: Implications for conservation

Marine Snails of the Genus Phorcus: Biology and Ecology of Sentinel Species for Human Impacts on the Rocky Shores

Population Characteristics of the Limpet Patella caerulea (Linnaeus, 1758) in Eastern Mediterranean (Central Greece)

Contact Info

Product

Resources

About