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Marine Mollusks of Bahía Málaga, Colombia (Tropical Eastern Pacific)

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Marine Mollusks of Bahía Málaga, Colombia (Tropical Eastern Pacific) 10TH ANNIVERSARY ISSUE Check List the journal of biodiversity data LISTS OF SPECIES Check List 11(1): 1497, January 2015 doi: http://dx.doi.org/10.15560/11.1.1497 ISSN 1809-127X © 2015 Check List and Authors Marine mollusks of Bahía Málaga, Colombia (Tropical Eastern Pacific) Luz Ángela López de Mesa1* and Jaime R. Cantera2 1 Texas A&M University-Corpus Christi, Biology, 6300 Ocean Dr. CS 239 annex, Corpus Christi, TX, USA 2 Universidad del Valle, Departamento de Biología, Facultad de Ciencias Naturales y Exactas, Calle 13 # 100-00, Cali, Colombia * Corresponding author. E-mail: [email protected] Abstract: A checklist of mollusks reported in Bahía Málaga hence high biodiversity. Its littoral zone, with an area of 136 (Valle del Cauca, Colombia) was developed through recent km2, is composed of different ecosystems, such as rocky and samplings in the zone (2004–2012), together with bibliograph- sandy shores, muddy flats, and mangrove forests (Cantera ic and museums’ collections reviews. Species’ distributions 1991). in Bahía Málaga were established through 18 different sub- Rocky shores in Bahía Málaga may consist of cliffs and/or regions, which included the inner, middle and outer zones of boulders. The range in the size and texture of the particles the bay. A revision of the western American distribution for present in the rocky shores allow for a variety of microhabi- the species was also carried out. A total of 426 species were tats, making it a very diverse ecosystem (INVEMAR et al. found, of which 44 were new reports for the Colombian Pacific 2007). Sandy beaches consist of very fine particles that may coast. Results supported the high marine biodiversity that be free or compacted, primary containing fragments of mol- has been reported for this region. lusk shells and decomposing vegetative matter, originating from the surrounding mangroves (Cantera et al. 1994). These Key words: Tropical western coast of America; marine zones have been found to be most affected by the tide action invertebrates; Mollusca and are primary found near the bay’s mouth. Mudflats consist of miry expanses resulting from erosion of coastal areas that are rich in detrital material. These zones are rich in nutrients; INTRODUCTION hence their energetic content is high (Prahl et al. 1990). Bahía Bahía Málaga (Malaga Bay) is one of the most biodiverse Málaga’s substrate variety leads to a fragmented distribution zones on the Pacific coast of Colombia. The high marine bio- of mangroves. In zones where cliffs are common (north and diversity of Bahía Málaga played a fundamental role in its south), dwarfed mangroves predominate, while in zones with declaration in 2010 as a marine protected area, becoming the greater influence of rivers (inner zone of the bay), mangrove 56th unit of the National System of Colombian Protected Areas forests are more developed, with tall mangrove trees and (Sistema Nacional de Áreas Marinas Protegidas). more extensive stands (INVEMAR et al. 2007). Zoological studies on the Colombian Pacific coast have been focused mainly on crustaceans and fishes. Bahía Málaga is not Data collection an exception; most of the scientific research in the region has A detailed checklist for mollusks of Bahía Málaga was been focused on these taxonomic groups (INVEMAR et al. developed through the information gathered during three 2007). There have been some attempts to make checklists and major research projects in the last nine years, both based to carry out other biological studies (at specific, population, on the projects’ sampling results and on bibliographic and and community levels) of Mollusca, some of them focused collection reviews. The projects were: Valuation of Marine on species of economic interest (Rubio et al. 1988) and oth- and Coastal Diversity of Bahía Málaga, Valle del Cauca ers relating species with their habitats (Escallón and Cantera (2004–2007) (INVEMAR et al. 2007), Biodiversity of Vul- 1989; Cantera 1991; Lozano-Cortés et al. 2012) but none of nerable Life Cycle Stages of Marine Organisms in Bahía them is complete. Now, with more than 20 years of research, Málaga (Colombian Pacific) as a Conservation Criteria this checklist contains all species known in the bay. (2007–2010) (UNIVALLE and INVEMAR 2010) and Envi- ronmental Vulnerability of Marine and Coastal Ecosystems MATERIALS AND METHODS of Bahía Málaga (Colombian Pacific): Natural and Anthrop- Study site ic Threats (2011–2013) (UNIVALLE and INVEMAR. 2013). Bahía Málaga is located in the central region of the Sampling was carried out at 18 subregions in the bay (Fig- Colombian Pacific coast (03°56'–04°05' N and 77°19'–77°21' W) ure 1) between 2004 and 2012, and was based on intense (Figure 1). Due to the fact that it is a tectonic estuary, the bay sampling, rapid ecological assessments for intertidal and is a hybrid between hard (tertiary cliffs) and soft (estuarine shallow water habitats (using snorkeling and scuba diving), zones) substrates, presenting a high number of habitats and and on the use of different artificial habitats as collection Check List | www.biotaxa.org/cl 1 Volume 11 | Number 1 | Article 1497 López de Mesa and Cantera | Mollusks of Bahía Málaga, Colombia Figure 1. Bahía Málaga (left), Colombian Pacific Coast (middle), South America (right). The study area was divided in 18 subregions: 1: Isla El Aguante; Iguanero, Aguacate; 2: Luisico; 3: Estero Valencia, Estero Alegría, El Corozal; 4: La Plata, Isla Ultima, Isla Grande, Isla Cabezon; 5: Mayordomo; 6: La Muerte, Los Chorros; 7: Isla Curichiche; 8: Punta Alta, Base Naval, Rampa Suecos, La Jota; 9: Los Negros; 10: La Sierpe; 11: Isla Monos, Caleta Cabezón, Caracas; 12: Los Agujeros; 13: La Despensa; 14: Playa Chucheros; 15: La Barra, Juanchaco, Ladrilleros; 16: Isla Palma, Morro del Medio, Morro Chiquito; 17: Juan de Dios, Playa Dorada, El Tigre; 18: Los Negritos. (Map sketch provided by M.A. Ocampo). sites for subtidal marine organisms in the bay. The artifi- RESULTS cial habitats consisted of plastic baskets filled with pieces A total of 426 species of marine mollusks were reported in of bricks, broken shells of Anadara sp. and/or coconut fiber. Bahía Málaga: Polyplacophora: 3 families, 7 species; Bivalvia: The baskets were tied to rocks on the sea bottom at a 34 families, 168 species; Gastropoda: 68 families, 249 species, depth range of 2–5 m and collected three months later. Cephalopoda: 2 families, 2 species (Appendix 1). Between The collected specimens were deposited in three different 2004 and 2012, there were 145 species newly reported in the collections: Colección de Referencia Biología Marina Uni- bay (Figure 2). Forty-four of these species were new reports versidad del Valle, (Cali, Colombia), Museo Departamental for the Colombian Pacific coast, hence extending their geo- de Ciencias Naturales INCIVA (Cali, Colombia) and Museo graphic distribution. Thirty-four species have been found de Historia Natural Marina de Colombia, INVEMAR (Santa only as empty shells in the bay. Unpublished literature, e.g., Marta, Colombia). Master’s theses, dissertations, undergraduate projects, etc., The taxonomic status of each species reported in Bahía have reported 39 species in the bay that were neither found Málaga was checked in the World Register of Marine Species in the surveys of the previously mentioned research projects, online database (WoRMS 2014) (http://www.marinespecies. reported in published papers, nor found in museum collec- org). The geographic range of each species was also reviewed tions. These species were: Anadara multicostata (G.B. Sowerby in Discover Life (2014) (http://www.discoverlife.org), I, 1833); Anadara nux (G.B. Sowerby I, 1833); Anadara obesa Encyclopedia of Life (2014) (http://eol.org), Keen (1971), (G.B. Sowerby I, 1833); Anadara perlabiata (Grant & Gale, and Coan and Valentich-Scott (2012). CITES (2014) (http:// checklist.cites.org), IUCN (2014) (http://discover.iucnredlist. 430 org), and local red lists (Ardila et al. 2002; Castellanos et al. 410 2011) and interviews with experts of the region were reviewed in order to identify species with some state of vulnerability. ecies 390 Species with economic importance were identified through Sp 370 a review of FAO (Food and Agriculture Organization of the United Nations) literature (Fischer et al. 1995), as well as 350 interviews with local people. Databases and collections from 330 museums were reviewed in order to identify lots of marine 310 mollusks collected in Bahía Málaga: Smithsonian National Museum of Natural History, Florida Museum of Natural 290 History, Natural History Museum of Los Angeles County, Registered of Number 270 Santa Barbara Museum of Natural History (SBMNH), Colección de Referencia Biología Marina Universidad del Valle 250 (CRBMUV), Museo Departamental de Ciencias Naturales 2004 2007 2011 INCIVA (INCIVA) and Museo de Historia Natural Marina de Cite Year Colombia, INVEMAR (MHNCI). Lots for Bahía Málaga were Figure 2. Increase of marine mollusk species reported for Bahía Málaga found in SBMNH, INCIVA, CRBMUV and MHNCI. (Colombian Pacific) between 2004 and 2011. Check List | www.biotaxa.org/cl 2 Volume 11 | Number 1 | Article 1497 López de Mesa and Cantera | Mollusks of Bahía Málaga, Colombia 1931); Callistoctopus macropus (Risso, 1826); Cancellaria gem- shell dimension <10 mm (Kay 1980), a group that currently mulata G.B. Sowerby I, 1832; Coralliophila costata (Blainville, has a scarce bibliography for the American Pacific coast. The 1832); Crossata ventricosa (Broderip, 1833); Donax obesulus results of this study show the lack of knowledge of the marine Reeve, 1854; Donax punctatostriatus Hanley, 1843; Emarginula micromollusks of the Colombian Pacific. The study of micro- longifissa G.B. Sowerby II, 1866; Gastrochaena ovata Sowerby I, mollusks requires special techniques not only for sampling 1834 ; Gemophos gemmatus (Reeve, 1846); Hindsiclava hertlei- but also for sorting, preparing and identifying the samples. ni Emerson & Radwin, 1969; Hindsiclava resina (Dall, 1908); Presently, no studies focusing on micromollusks have been Hysteroconcha multispinosa (G.B.
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