Larval development of Arbacia lixula (Linneo, 1758) in two Marine Protected Area: preliminary data.

Risultato della ricerca: Other

Abstract

The sea urchin Arbacia lixula is a crucial species in driving the algal assemblages dynamic of the infralittoral zone. A. lixula is considered a thermophilic species and its increase in abundance in western Mediterranean waters, probably is due to an increase in seawater temperature.The aim of this study was to examine the reproductive success of A. lixula by larval development. The study was conducted within two Sicilian MPA (Capo Gallo-Isola delle Femmine and Ustica), characterized by photophilic algae, the same exposure and seawater temperature.In each area, twenty random specimens was sampled from May to September 2010, and mature gametes were collected from six males and six females to prepare embryos reared in experimental conditions. The larvae were monitored for 48h after the fertilization to assess the different stages and times of development. Our results showed a different larval development within two MPA, in time and quality of embryos. The samples from Ustica had a slower developmental rate and a higher mortality than samples from Capo Gallo. We hypothesize that in Ustica, A. lixula allocates almost resources into body components (Aristotele’s lantern) affecting reproductive success, than in Capo Gallo, probably due to an intra-specific competition relative to others factors here not investigated.
Lingua originaleEnglish
Pagine42-42
Numero di pagine46
Stato di pubblicazionePublished - 2010

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algae
larval development
embryo (animal)
conservation areas
seawater
intraspecific competition
fertilization (reproduction)
Echinoidea
germ cells
temperature
sampling
larvae
reproductive success
Arbacia

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title = "Larval development of Arbacia lixula (Linneo, 1758) in two Marine Protected Area: preliminary data.",
abstract = "The sea urchin Arbacia lixula is a crucial species in driving the algal assemblages dynamic of the infralittoral zone. A. lixula is considered a thermophilic species and its increase in abundance in western Mediterranean waters, probably is due to an increase in seawater temperature.The aim of this study was to examine the reproductive success of A. lixula by larval development. The study was conducted within two Sicilian MPA (Capo Gallo-Isola delle Femmine and Ustica), characterized by photophilic algae, the same exposure and seawater temperature.In each area, twenty random specimens was sampled from May to September 2010, and mature gametes were collected from six males and six females to prepare embryos reared in experimental conditions. The larvae were monitored for 48h after the fertilization to assess the different stages and times of development. Our results showed a different larval development within two MPA, in time and quality of embryos. The samples from Ustica had a slower developmental rate and a higher mortality than samples from Capo Gallo. We hypothesize that in Ustica, A. lixula allocates almost resources into body components (Aristotele’s lantern) affecting reproductive success, than in Capo Gallo, probably due to an intra-specific competition relative to others factors here not investigated.",
keywords = "algal assemblage, global warming, sea urchin",
author = "Fabrizio Gianguzza and Paola Gianguzza and Silvano Riggio and Giulia Visconti",
year = "2010",
language = "English",
pages = "42--42",

}

TY - CONF

T1 - Larval development of Arbacia lixula (Linneo, 1758) in two Marine Protected Area: preliminary data.

AU - Gianguzza, Fabrizio

AU - Gianguzza, Paola

AU - Riggio, Silvano

AU - Visconti, Giulia

PY - 2010

Y1 - 2010

N2 - The sea urchin Arbacia lixula is a crucial species in driving the algal assemblages dynamic of the infralittoral zone. A. lixula is considered a thermophilic species and its increase in abundance in western Mediterranean waters, probably is due to an increase in seawater temperature.The aim of this study was to examine the reproductive success of A. lixula by larval development. The study was conducted within two Sicilian MPA (Capo Gallo-Isola delle Femmine and Ustica), characterized by photophilic algae, the same exposure and seawater temperature.In each area, twenty random specimens was sampled from May to September 2010, and mature gametes were collected from six males and six females to prepare embryos reared in experimental conditions. The larvae were monitored for 48h after the fertilization to assess the different stages and times of development. Our results showed a different larval development within two MPA, in time and quality of embryos. The samples from Ustica had a slower developmental rate and a higher mortality than samples from Capo Gallo. We hypothesize that in Ustica, A. lixula allocates almost resources into body components (Aristotele’s lantern) affecting reproductive success, than in Capo Gallo, probably due to an intra-specific competition relative to others factors here not investigated.

AB - The sea urchin Arbacia lixula is a crucial species in driving the algal assemblages dynamic of the infralittoral zone. A. lixula is considered a thermophilic species and its increase in abundance in western Mediterranean waters, probably is due to an increase in seawater temperature.The aim of this study was to examine the reproductive success of A. lixula by larval development. The study was conducted within two Sicilian MPA (Capo Gallo-Isola delle Femmine and Ustica), characterized by photophilic algae, the same exposure and seawater temperature.In each area, twenty random specimens was sampled from May to September 2010, and mature gametes were collected from six males and six females to prepare embryos reared in experimental conditions. The larvae were monitored for 48h after the fertilization to assess the different stages and times of development. Our results showed a different larval development within two MPA, in time and quality of embryos. The samples from Ustica had a slower developmental rate and a higher mortality than samples from Capo Gallo. We hypothesize that in Ustica, A. lixula allocates almost resources into body components (Aristotele’s lantern) affecting reproductive success, than in Capo Gallo, probably due to an intra-specific competition relative to others factors here not investigated.

KW - algal assemblage

KW - global warming

KW - sea urchin

UR - http://hdl.handle.net/10447/58422

M3 - Other

SP - 42

EP - 42

ER -