Harvesting, predation and competition effects on a red coral population

Abbiati, Marco; Buffoni, G.; Caforio, G.; Cola, Giovanni Di; Santangelo, Giovanni

doi:10.1016/0077-7579(92)90060-r

Cited by 39 publications

(30 citation statements)

References 10 publications

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“…Such density-dependence, due presumably to the reduced availability of free space, is to be included in a dynamic model, which will enable simulations of population trends over time. The model constructed in a previous work (Abbiati et al, 1992) thus requires updating on the basis of such findings. The model includes an arbitrary feedback term representing the control exerted by adult density on population growth (Caswell, 1992).…”

Section: Discussionmentioning

confidence: 99%

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Demography of the over-exploited Mediterranean red coral (<i>Corrallium rubrum</i> L. 1758)

Santangelo¹,

Maggi²,

Bramanti³

et al. 2004

Sci. Mar.

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Section: Discussionmentioning

confidence: 99%

“…Colonies (n = 4408) were collected during two different years (1992 and 1997) and assigned to a size class (i) on the basis of the diameter of their base, using the following relation between diameter, D, and number of growth rings, A (Abbiati et al, 1992;Santangelo et al, 1999):…”

Section: Sampling and Population Analysismentioning

confidence: 99%

Demography of the over-exploited Mediterranean red coral (<i>Corrallium rubrum</i> L. 1758)

Santangelo¹,

Maggi²,

Bramanti³

et al. 2004

Sci. Mar.

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“…Each basal cross section was counted at least three times to estimate interpretation error, and the arithmetic mean value of the count (rounded to a whole number) was used to determine the number of bands, which we have interpreted as annual bands. Although the exact nature of the banding pattern has not been demonstrated for a tropical gorgonian, bands are known to be annual in species from deeper water and from temperate species (Grigg, 1974;Abbiati et al, 1992;Santangelo et al, 1993;Ceccherelli, 1993, 1994). Mitchell et al (1993) presents data indicating that the growth rings are produced annually in Leptogorgia virgulata, a semi-temperate species in the Gorgoniidae, the same family as P. elisabethae.…”

Section: Methodsmentioning

confidence: 99%

“…Colony age was estimated by growth ring analysis (Knuston et al, 1972;Grigg, 1974;García-Rodríguez and Massò, 1986;Abbiati et al, 1992;Mitchell et al, 1993;Mistri and Ceccherelli, 1994;Santangelo et al, 2004). Cross sections cut 1 cm from the colony base were glued onto a support, embedded in epoxy resin, and then polished using a grinder/polisher to enhance the definition of the individual growth rings.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, a number of authors using either growth rate data or size and age data have fit growth in gorgonians to Von Bertalanffy growth functions (Grigg, 1975;Mistri and Ceccherelli, 1993;Mitchell et al, 1993). When it can be used this approach allows analyses that can further address the population dynamics, ecology and management of populations (Grigg, 1976(Grigg, , 1984Abbiati et al, 1992;Santangelo et al, 1993;Mistri and Ceccherelli, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Modular growth of a gorgonian coral can generate predictable patterns of colony growth

Goffredo

Lasker

2006

Journal of Experimental Marine Biology and Ecology

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The modular construction of colonial organisms can generate complex growth patterns that incorporate both growth and partial mortality. These patterns often confound simple age based descriptions of growth but, in some cases, modularity can generate predictable patterns of colony growth that are amenable to modeling approaches more commonly used in unitary organisms. Colonies of the Caribbean gorgonian Pseudopterogorgia elisabethae from a 20 m deep population in the Bahamas exhibit such characteristics. Mass was highly predictable from colony height, following a power function with an exponent of 2.1. Age, as determined from counts of annual growth rings was a good predictor of height and mass. The relationship between age and height was modeled using a Von Bertalanffy growth curve. Growth models from both the age:height relationship and from extrapolations of colony growth rates from another Bahamian population yielded similar but more variable results. Based on those data and previously published observations of spawning and survivorship, colonies reach sexual maturity at 5-7 y and can live to over 40 y. Using the Von Bertalanffy function to estimate ages from height facilitates interpretation of size frequency distributions and suggested enhanced recruitment on San Salvador Island following the passage of Hurricane Andrew in 1992. Although simple growth models do not characterize the variance inherent in modular growth, these models can provide useful tools for the interpretation of population data.

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Red coral: conservation and management of an over‐exploited Mediterranean species

Santangelo¹,

Abbiati

2001

Aquatic Conservation

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ABSTRACT1. Corallium rubrum is a precious circum-Mediterranean octocoral, which occurs on rocky reefs between 10 and over 250 m in depth.2. This species has been harvested for a long time and most commercial populations have been over-exploited. The Mediterranean overall yield was reduced by 66% over the last 15 years.3. Two type populations may be identified: (a) dense shallow-water populations consisting of small, slow-growing, short-lived colonies and (b) deep-dwelling populations, composed of large, sparse, long-lived colonies. The former populations have little economic value, but should ensure a reproductive stock for the species.4. While the structure and demography of shallow-water populations have been studied, the demographic parameters of deep-dwelling populations are largely unknown.5. Recent genetic studies quantified levels of genetic divergence among coastal populations. Estimated numbers of migrants among populations suggested that the planulae of C. rubrum have short-range dispersal. Geographic distances greater than 100 km can be considered as the threshold for genetic divergence between populations.6. Development of a regime for the sustainable exploitation of this species requires a better knowledge of population dynamics, life-history traits and quantitative genetics, especially concerning commercial populations.

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Harvesting, predation and competition effects on a red coral population

Cited by 39 publications

References 10 publications

Demography of the over-exploited Mediterranean red coral (<i>Corrallium rubrum</i> L. 1758)

Demography of the over-exploited Mediterranean red coral (<i>Corrallium rubrum</i> L. 1758)

Modular growth of a gorgonian coral can generate predictable patterns of colony growth

Red coral: conservation and management of an over‐exploited Mediterranean species

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