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Gonzalez-Wanguemert M.,University of Algarve | Borrero-Perez G.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis
Marine Biodiversity Records | Year: 2012

Holothuria arguinensis is reported for the first time on the south-eastern Spanish coast. One specimen of this species was identified in El Mojón (Alicante, Spain, 37°50′54.17″N 0°45′39.90″W). This finding widens the geographical range of H. arguinensis and demonstrates that its environmental requirements are changing. Future genetic studies in this species would allow us to improve our understanding of its colonization from the Atlantic Ocean to the Mediterranean Sea. © 2012 Marine Biological Association of the United Kingdom. Source


Lucero-Rincon C.H.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis | Lucero-Rincon C.H.,University of Valle | Cantera J.R.K.,University of Valle | Gil-Agudelo D.L.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis | And 5 more authors.
Revista de Biologia Marina y Oceanografia | Year: 2013

The reproductive cycle, recruitment and maturity size of the mangrove cockle Anadara tuberculosa was studied between August 2009 and August 2010 at the 4 departments of the Colombian Pacific coast. Biological samples were collected on three 50 m2 plots of each region following the traditional method of capture. To determine the state of sexual development, monthly macro and microscopy (using standard histological techniques) observations were performed. The reproductive cycle was divided in 4 stages, resting, development, maturity and spawning. Spawning events were evident throughout the study period, with higher reproductive activity between December and March, and a second short event between June and August. The average maturity size (46.68 ± 9.29 mm) and mean first maturity size (43.50 mm) are below the minimum legal size of capture (50.00 mm) in Colombia. Temporal variation of reproductive activity and recruitment shows no evidence of sexual maturity synchrony in the Colombian Pacific, important for the establishment of management strategies of the resource. Three percent of hermaphroditism was found which is considered protandric due to the imbalance of sex ratio between females and males (2.46:1) and size difference between sexes. Source


Cruz-Motta J.J.,Simon Bolivar University of Venezuela | Miloslavich P.,Simon Bolivar University of Venezuela | Palomo G.,Museo Argentino de Ciencias Naturales Bernardino Rivadavia | Iken K.,University of Alaska Fairbanks | And 17 more authors.
PLoS ONE | Year: 2010

Assemblages associated with intertidal rocky shores were examined for large scale distribution patterns with specific emphasis on identifying latitudinal trends of species richness and taxonomic distinctiveness. Seventy-two sites distributed around the globe were evaluated following the standardized sampling protocol of the Census of Marine Life NaGISA project (www.nagisa.coml.org). There were no clear patterns of standardized estimators of species richness along latitudinal gradients or among Large Marine Ecosystems (LMEs); however, a strong latitudinal gradient in taxonomic composition (i.e., proportion of different taxonomic groups in a given sample) was observed. Environmental variables related to natural influences were strongly related to the distribution patterns of the assemblages on the LME scale, particularly photoperiod, sea surface temperature (SST) and rainfall. In contrast, no environmental variables directly associated with human influences (with the exception of the inorganic pollution index) were related to assemblage patterns among LMEs. Correlations of the natural assemblages with either latitudinal gradients or environmental variables were equally strong suggesting that neither neutral models nor models based solely on environmental variables sufficiently explain spatial variation of these assemblages at a global scale. Despite the data shortcomings in this study (e.g., unbalanced sample distribution), we show the importance of generating biological global databases for the use in large-scale diversity comparisons of rocky intertidal assemblages to stimulate continued sampling and analyses. © 2010 Cruz-Motta et al. Source


Portela J.M.B.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis | Diazgranados J.G.S.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis | Mejia-Ladino L.M.,Institute Investigaciones Marinas Y Costeras Jose Benito Vives Of Andreis | Kintz J.R.C.,University of Valle
Acta Biologica Colombiana | Year: 2011

A monitory plan in ten stations distributed in bahía Málaga between 2005 and 2006 was done to evaluate superficial water quality using physico-chemical, microbiological, nutrients and toxic organic variables. The streams and rivers in this zone (Luisico, Valencia, Los Monos y La Sierpe) bring biogenic materials (N, P, Si) that sustains primary productivity in the bay. This bay does not show any eutrophication process. The results constitute useful arguments for the local, regional and national authorities in the process of conservation and plans of managing of the bay as marine protected area. Source

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