Reef fishes of the Mazunte-Bahías de Huatulco reef track, Oaxaca, Mexican Pacific

Zootaxa ◽  
2010 ◽  
Vol 2422 (1) ◽  
pp. 53 ◽  
Author(s):  
RAMÓN ANDRÉS LÓPEZ PÉREZ ◽  
IMELDA LÓPEZ PÉREZ-MALDONADO ◽  
ARIADNA MONTSERRAT LÓPEZ ORTIZ ◽  
LINDA MARGARITA BARRANCO SERVIN ◽  
JAVIER BARRIENTOS VILLALOBOS ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
New Records ◽  
Reef Fishes ◽  
Visual Census ◽  
Mexican Pacific ◽  
Reef Communities ◽  
Census Techniques

Although fish are one of the most abundant, conspicuous and structurally important inhabitants of reef systems, the group has remained largely ignored from biodiversity accounts on the Oaxaca reef track. Reef icthyofauna composition at 10 sites between Mazunte and Isla Montosa was gathered through stationary visual census techniques during 19982008. A total of 112 species belonging to 81 genera, 40 families and 11 orders were recorded. Species richness of the study area is higher than similar reef communities in the Mexican Pacific. Thirty species represent new records for the study area, and some discrepancies were found between local (this study) and regional accounts. Our data suggest that species composition in the area is still incomplete.

scholarly journals FLORÍSTICA DE DIATOMEAS EPIFITAS EN UN MANCHÓN DE MACROALGAS SUBTROPICALES

2006 ◽  
Vol 21 (1-2) ◽  
pp. 11
Author(s):  
D. A. Siqueiros Beltrones ◽  
O. U. Hernández Almeida
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
New Records ◽  
Diatom Assemblages ◽  
Epiphytic Diatoms

Se determinó la composición de especies de diatomeas epifitas en macroalgas de distintos taxa en una zona subtropical. Para ello, en un manchón ubicado en la playa Punta Roca Caimancito, B. C. S., se tomaron muestras de las macroalgas sobresalientes, en junio y diciembre de 2001, y abril, mayo y julio del 2002. Se identificaron 13 especies de macroalgas, de las cuales: Hydroclathrus clathrathus, Laurencia pacifica, L. johnstonii, Padina mexicana, P. caulescens y Codium spp. fueron las más conspicuas. El examen de la flora epifítica redituó 278 taxa de diatomeas, que es la máxima riqueza registrada para este tipo de sustrato, y de los cuales 44 son nuevos registros para la región. De los 75 géneros reconocidos de diatomeas, los mejor representados fueron: Mastogloia (25 especies), Amphora (23), Navicula (23), Nitzschia (22), Cocconeis (22), Lyrella (12) y Achnanthes (11). Los taxa más abundantes fueron Cocconeis disculus y C. dirupta. El número de taxa de diatomeas por especie hospedera también fue alto y varió entre 89 ( Codium spp.) y 143 ( L. pacifica), aunque las diferencias podrían deberse al número de especímenes procesados por especie de macroalga. Floristics of epiphytic diatoms in a patch of subtropical macroalgae The species composition of epiphytic diatom assemblages found on different taxa of subtropical macroalgae was determined. Samplings were carried out in a macroalgae bed located in Punta Roca Caimancito beach, B. C. S. in june and december 2001, and on april, may and july 2002, collecting the most frequent macroalgae taxa. The most conspicuous out of twelve macroalgae taxa were: Hydroclathrus clathrathus, Laurencia pacifica, L. johnstonii, Padina mexicana and P. caulescens. A total of 278 diatom taxa were recorded. This is the largest species richness recorded for this type of substrate, and out of which 44 are new records for the region. Out of 75 genera recognized the best represented were: Mastogloia (25 species), Amphora (23), Navicula (23), Nitzschia (22), Cocconeis (22), Lyrella (12) and Achnanthes (11). The most abundant taxa were Cocconeis disculus and C. dirupta. The number of diatom taxa per macroalgae species was also high, ranging from 89 (Codium spp.) to 143 (L. pacifica). Albeit, this difference could be attributed to the number of specimens collected per macroalga species.

Free-living marine planktonic unarmoured dinoflagellates from the Gulf of Mexico and the Mexican Pacific

2015 ◽  
Vol 58 (1) ◽  
Author(s):  
Sergio Escobar-Morales ◽  
David U. Hernández-Becerril
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
New Records ◽  
Morphological Characters ◽  
Phylogenetic Group ◽  
Free Living ◽  
Mexican Pacific ◽  
Scanning Electron

AbstractThe so-called unarmoured dinoflagellates are not a “natural” (phylogenetic) group but they lack thecal plates, share fragility and possess relatively few morphological characters that can be positively identified. This study depicts the species composition of unarmoured dinoflagellates collected from sites along the coasts of the Gulf of Mexico and the Mexican Pacific and includes their descriptions and illustrations. We identified a total of 25 species belonging to 13 genera and six families that were studied through various techniques using light and scanning electron microscopy. Seven new records for the Mexican Pacific are annotated here that include

scholarly journals KELIMPAHAN IKAN KARANG PADA KAWASAN TERUMBU BUATAN DI PERAIRAN RATATOTOK SULAWESI UTARA

2015 ◽  
Vol 6 (1) ◽  
pp. 55 ◽  
Author(s):  
Indri Manembu ◽  
L.A Adrianto ◽  
D Bengen ◽  
F Yulinda
Keyword(s):  
Coral Reef ◽  
Species Composition ◽  
Reef Fishes ◽  
Coral Reef Fishes ◽  
Sea Surface ◽  
Artificial Reefs ◽  
Line Transect ◽  
Visual Census ◽  
Coral Fish ◽  
Reef Ecosystem

Ekosistemterumbu karangmerupakan salah satu potensi sumberdaya laut yang sangat penting bagi kehidupan manusia. Potensi sumberdaya ikan karang di perairan Indonesia perlu diketahui agar dapat dikembangkan sebagai salah satu aset dalamkegiatan pariwisata bahari. Penelitian yang dilakukan tahun 2009-2011 bertujuan untuk mengetahui kelimpahan dan komposisi jenis ikan karang pada kawasan terumbu buatan di perairan Ratatotok. Metode line transect dan sensus visual pada perairan seluas 250M2 digunakan untuk mengetahui kelimpahan ikan karang dengan keragaman jenis pada masing-masing stasiun pengamatan pada kedalaman 10 meter. Hasil penelitian telah teridentifikasi sebanyak 116 spesies ikan pada terumbu buatan Stasiun 1 (daerah Teluk Buyat); 112 spesies pada terumbu buatan Stasiun 2 (daerah Tanjung) dan pada terumbu alami di Stasiun 3 (daerah Ratatotok) sebanyak 88 spesies. Kelimpahan ikan pada kawasan terumbu buatan lebih tinggi pada kisaran 24-28 spesies daripada karang alami. Kelimpahan spesies ikan dari famili Pomacentridae mendominasi ketiga stasiun pengamatan dengan 19 spesies dan yang paling sedikit dari famili Anomalopidae yang hanya ditemukan 1 spesies.Coral reef ecosystem is one of important natural resources in tropical waters. It has some coral reef fishes, species of corals and others biota that have several most interesting ecotourism extraction scientific and educational objects. The aim of this study is to determine the abundance of coral fish composition surrounded in artificial reefs area in Ratatotok waters. This study was done during 2009 to 2011by using the visual census and line transect methods within area of 250 M2 to observe the species composition and diversitas of coral fishes founded in three sites at the depth of 10 m from sea surface. The results showed that there were 116 species in Site 1(Buyat bay); 112 species in Site 2 (Tanjung) and 88 species of coral reef fishes in Site 3 (Ratatotok). Fishes of Pomacentridae were found 19 species in all locations. Only one species fish of Anomalopidae was found.

scholarly journals Species richness and biogeographical affinities of the marine molluscs from Bahía de Chamela, Mexico

2020 ◽  
Vol 8 ◽  
Author(s):  
Eduardo Ríos-Jara ◽  
Cristian Galván-Villa ◽  
María del Carmen Esqueda-González ◽  
Manuel Ayón-Parente ◽  
Fabián Rodríguez Zaragoza ◽  
...  
Keyword(s):  
Species Richness ◽  
Geographic Distribution ◽  
Benthic Macroinvertebrates ◽  
New Records ◽  
Oceanic Islands ◽  
Tropical Eastern Pacific ◽  
Western Atlantic ◽  
Mexican Pacific ◽  
Range Distribution ◽  
First Time

For more than 10 years (2007-2018), the benthic macroinvertebrates of Bahía de Chamela (Mexican Pacific) were sampled at 31 sites (0-25 m depth). A total of 308 species of the five main classes of benthic molluscs were obtained (106 bivalves, 185 gastropods, 13 polyplacophorans, two scaphopods and two cephalopods). This is a significant increase in the number of species (246 new records) compared to the 62 species previously recorded more than 10 years ago. The distribution in the 31 localities of the bay is given for the first time for most of the species, together with information on its ecological rarity (incidence in the samples). Two families of bivalves (Veneridae and Mytilidae) and three families of gastropods (Calyptraeidae, Muricidae and Collumbellidae) comprised ~ 30% of all species. Ecological rarity was evident with 45 families (45.0%) with only one species and 178 species (57.8%) collected in one site and 67 (21.8%) in two sites. The molluscs of Bahía de Chamela represent 12.2% of all species recorded in the Mexican Pacific. Their biogeographic affinities are mostly related to the Tropical Eastern Pacific (TEP) including the oceanic islands and a few are restricted to the Tropical Mexican Pacific (TMP). Some have broader distributions to adjacent northern and southern temperate regions of the American Pacific, one to the western Atlantic, two pantropical (PAN) and two cosmopolitans (COS). The range distribution of each species was reviewed and updated, thus finding that seven species have extended their ranges of geographic distribution.

scholarly journals Coral Fishes Community On The Artificial Coral Reefs Of Kareko Waters, North Lembeh Island District, Bitung City, North Sulawesi

2017 ◽  
Vol 5 (2) ◽  
pp. 145
Author(s):  
Gisela Awuy ◽  
Ari B. Rondonuwu ◽  
Alex Denny Kambey
Keyword(s):  
Species Richness ◽  
Coral Reefs ◽  
Diversity Index ◽  
Artificial Reef ◽  
Scuba Diving ◽  
Reef Fishes ◽  
Artificial Reefs ◽  
Total Density ◽  
Visual Census ◽  
North Sulawesi

The aim of this research is to determine the species richness, individual abundance, and the ecology index of the coral fishes on the artificial reef of Kareko waters,  District of North Lembeh - Bitung City. The data is collected using “Visual Census” technique by scuba diving. The amount of the reef fishes found in the artificial coral reefs were 53 species. The abundance species in the artificial reefs which made from metal were 34 species and which made from concrete were 35 species. The total of number individuals of coral fishes from 47 species is 210.50 individuals/30m2. The total density was 7,017 individuals/m2. The highest relative density on iron-made reefs was found in Dascyllus trimaculatus (15.73%) and and which made from concrete were Dascyllus reticulatus (10.85%).  Based on H’, H’max, and H’min, the diversity Index  of coral fishes in both artificial reefs including high.Keywords : Coral Fishes, Artificial Reef, Kareko ABSTRAKTujuan penelitian ini yaitu untuk mengetahui kekayaan spesies, kelimpahan individu, dan indeks ekologi ikan karang pada terumbu buatan di Perairan Kareko. Kecamatan Lembeh Utara, Kota Bitung. Pengambilan data dilakukan dengan menggunakan teknik “Sensus Visual” dengan melakukan penyelaman SCUBA. Jumlah spesies ikan karang yang ditemukan pada terumbu buatan yaitu 53 spesies. Kekayaan spesies di terumbu buatan yang terbuat dari besi berjumlah 34 spesies, sedangkan di terumbu buatan beton berjumlah 35 spesies. Kelimpahan individu total ikan karang dari 47 spesies yaitu 210,50 individu/30 m2 sedangkan kepadatan/densitas total adalah 7,017 individu/m2. Kepadatan relative tertinggi untuk terumbu buatan besi ditemukan pada jenis Dascyllus trimaculatus (15,73%) dan untuk terumbu buatan beton ditemukan pada jenis Dascyllus reticulatus (10,85%). Berdasarkan nilai H’, H’max, and H’min, indeks keanekeragaman ikan karang pada kedua jenis terumbu buatan tergolong tinggi.Keywords : Coral Fishes, Artificial Reef, Kareko

scholarly journals First records and two new species of sipunculans (Sipuncula) from the Southern Mexican Pacific

2021 ◽  
Vol 740 ◽  
pp. 77-117
Author(s):  
Itzahí Silva-Morales ◽  
Julio D. Gómez-Vásquez
Keyword(s):  
New Species ◽  
Species Composition ◽  
New Records ◽  
Identification Key ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Tropical Eastern Pacific ◽  
Mexican Pacific ◽  
Two New Species

Sipunculans are a poorly studied group in the Tropical Eastern Pacific. For the Southern Mexican Pacific (SMP) there is only one record of a sipunculan species. The main objective of this work was to determine the species composition of the phylum Sipuncula present in the SMP. The study area covered three Mexican states: Guerrero, Oaxaca and Chiapas; specimens from 28 localities were examined from both intertidal and subtidal zones. A total of 551 specimens were reviewed, from which 11 species were identified. Five of them have previously been recorded in the Tropical Eastern Pacific (TEP): Apionsoma (A.) hespera comb. nov., A. (Edmondsius) pectinatum, Aspidosiphon (A.) elegans, Phascolosoma (P.) puntarenae and Themiste (T.) hennahi; four species are similar to nominal species: Sipunculus (S.) cf. polymyotus, Siphonosoma cf. vastum, Siphonosoma cf. cumanense and Phascolosoma (P.) cf. perlucens; and two new species are described: Aspidosiphon (Paraspidosiphon) cutleri sp. nov. and Aspidosiphon (Paraspidosiphon) pastori sp. nov. A checklist and an identification key for all sipunculan species from the TEP are presented. The checklist includes 53 taxa, 25 of which are questionable records. This work generated 11 new records of sipunculans in the SMP and five new records in the TEP.

scholarly journals ANURANS FROM BARRA DE LA LAGUNA DE ROCHA (ROCHA, URUGUAY)

2019 ◽  
Vol 2 (2) ◽  
pp. 23
Author(s):  
Gisela Pereira ◽  
Ernesto Elgue ◽  
Raúl Maneyro
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Protected Area ◽  
New Records ◽  
Management Plan ◽  
Field Trips ◽  
Historical Records ◽  
Conservation Unit ◽  
Amphibian Species ◽  
Future Studies

We present a list of amphibian species from the protected area Barra de la Laguna de Rocha (BLR), Uruguay. Fifteen monthly three-day field trips were performed between September 2011 and March 2013. During each field trip, active searches of individuals and auditive samplings were performed at seven selected sites. We recorded 19 species of amphibians belonging to five families: Bufonidae (4 especies), Hylidae (5), Leptodactylidae (7), Microhylidae (1) y Odontophrynidae (2). Comparing these data with historical records (obtained from cientific collections and literature), eight species represented new records for the study site. The species richness in the area represents 39.6% of the total richness recorded for Uruguay. We highlight the presence of Melanophryniscus montevidensis (Philippi 1902), a locally and globally threatened species. Information on BLR's amphibian species composition could help in the implementation of the management plan for this conservation unit, as well as to stimulate future studies in the area.

scholarly journals PROSPECTIVE FLORISTICS OF EPIPHYTIC DIATOMS ON RHODOPHYTA FROM THE SOUTHERN GULF OF MEXICO

2017 ◽  
Vol 32 (2) ◽  
pp. 35
Author(s):  
David Alfaro Siqueiros Beltrones ◽  
Yuriko Joscelin Martínez - Hernández
Keyword(s):  
Species Richness ◽  
Gulf Of Mexico ◽  
Species Composition ◽  
Light Microscopy ◽  
Red Algae ◽  
New Records ◽  
Similarity Measurement ◽  
Diatom Assemblages ◽  
Epiphytic Diatoms ◽  
Southern Gulf Of Mexico

Studies on epiphytic diatoms can be considered somewhat lacking worldwide, mainly because of the enormous scientific research potential around them, and there is still much to do concerning floristics alone. Particularly for the Mexican coasts, mainly in the southern Gulf of Mexico. Thus, our objective was to determine the epiphytic diatom floristics for several species of Rhodophyta from the coast of Veracruz state (México). Diatoms sampled from specimens of six taxa of Rhodophyta were observed in permanent mountings, under light microscopy. A total 115 diatom taxa were identified, that support our expectancy of a potential species richness much higher on red algae hosts. A presence absence similarity measurement suggested that a single diatom assemblage was hosted in the six red algae taxa. The species composition is highly similar to epiphytic diatom assemblages from NW Mexico, albeit six taxa are new records for Mexican littorals. A photographic catalog of the identified epiphytic diatoms is provided.Florística prospectiva de diatomeas epifitas sobre Rhodophyta en el Sur del Golfo de México Los estudios sobre diatomeas epifitas a nivel global se pueden considerar escasos, principalmente por el gran potencial científico que representan. Una consecuencia de ello es lo mucho que falta por hacer tan solo en florística a lo largo de las costas mexicanas, particularmente al sur del Golfo de México. Así, el objetivo de nuestro estudio fue determinar la florística de diatomeas epifitas en varias especies de Rhodophyta de la costa del Estado de Veracruz, México. Se identificaron diatomeas epifitas en talos de seis taxa en preparaciones permanentes bajo microscopía de luz. La lista florística de diatomeas redituó 115 taxa, lo que respalda nuestra expectativa de una riqueza de especies potencial mucho mayor en Rhodophyta hospederos. La similitud (Bray-Curtis) con base en presencia/ausencia de taxa sugiere que una sola asociación de diatomeas epifitas se distribuye entre los seis taxa de algas rojas hospederos. La composición de especies es muy similar a la de asociaciones de diatomeas epifitas del NW de México, aunque seis taxa son nuevos registros para litorales mexicanos. Se incluye un catálogo fotográfico de los taxa de diatomeas epifitas identificadas.

scholarly journals Anuran species composition of Cancão Municipal Natural Park, Municipality of Serra do Navio, Amapá state, Brazil

ZooKeys ◽  
2018 ◽  
Vol 762 ◽  
pp. 131-148 ◽  
Author(s):  
Yuri Breno Silva e Silva ◽  
Carlos Eduardo Costa-Campos
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Protected Area ◽  
New Records ◽  
Sampling Effort ◽  
Red Lists ◽  
Anuran Species ◽  
Natural Park ◽  
Considerable Portion ◽  
Data Deficient

In this study, the first survey of anuran species in the Cancão Municipal Natural Park is presented, a protected area of approximately 370 hectares of Amazonian forest located in the northwest center region of the state of Amapá, Brazil. The work was performed during the dry and rainy season, through active visual and auditory survey, totaling 216 man hours of sampling effort. Forty-nine species of anuran amphibians were recorded in the Cancão Municipal Natural Park, including three new records:Hyalinobatrachiumiaspidiense, Pristimantiscf.ockendeni, andScinaxgarbei. Three species,Hyalinobatrachiumiaspidiense,Ameeregapulchripecta, andAnomaloglossusbaeobatrachus, are listed as Data Deficient and one is listed as Vulnerable (Atelopushoogmoedi) according red lists of IUCN. The rarefaction curve cumulative species did not reach an asymptote, indicating that site has potential for species that have not yet been recorded. Nine species were represented by only one individual and were considered rare in the studied environments, eight species were defined as common, and the 32 remaining species were classified as having intermediary abundance. Our data indicated that Cancão Municipal Natural Park contains a considerable portion of the anurans species richness of Amapá state, turn the area into a place of great importance for the conservation of the anurans of the Eastern Amazon.

scholarly journals Disentangling the Ecological Determinants of Species and Functional Trait Diversity in Herb-Layer Plant Communities in European Temperate Forests

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 552
Author(s):  
Janez Kermavnar ◽  
Lado Kutnar ◽  
Aleksander Marinšek
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Plant Communities ◽  
Functional Trait ◽  
Forest Stand ◽  
Relative Importance ◽  
Herb Layer ◽  
Bud Bank ◽  
Tree Species Composition ◽  
Stand Characteristics

Forest herb-layer vegetation responds sensitively to environmental conditions. This paper compares drivers of both taxonomic, i.e., species richness, cover and evenness, and functional herb-layer diversity, i.e., the diversity of clonal, bud bank and leaf-height-seed plant traits. We investigated the dependence of herb-layer diversity on ecological determinants related to soil properties, climatic parameters, forest stand characteristics, and topographic and abiotic and biotic factors associated with forest floor structure. The study was conducted in different forest types in Slovenia, using vegetation and environmental data from 50 monitoring plots (400 m2 each) belonging to the ICP Forests Level I and II network. The main objective was to first identify significant ecological predictors and then quantify their relative importance. Species richness was strongly determined by forest stand characteristics, such as richness of the shrub layer, tree layer shade-casting ability as a proxy for light availability and tree species composition. It showed a clear positive relation to soil pH. Variation in herb-layer cover was also best explained by forest stand characteristics and, to a lesser extent, by structural factors such as moss cover. Species evenness was associated with tree species composition, shrub layer cover and soil pH. Various ecological determinants were decisive for the diversity of below-ground traits, i.e., clonal and bud bank traits. For these two trait groups we observed a substantial climatic signal that was completely absent for taxonomy-based measures of diversity. In contrast, above-ground leaf-height-seed (LHS) traits were driven exclusively by soil reaction and nitrogen availability. In synthesis, local stand characteristics and soil properties acted as the main controlling factors for both species and trait diversity in herb-layer communities across Slovenia, confirming many previous studies. Our findings suggest that the taxonomic and functional facets of herb-layer vegetation are mainly influenced by a similar set of ecological determinants. However, their relative importance varies among individual taxonomy- and functional trait-based diversity measures. Integrating multi-faceted approaches can provide complementary information on patterns of herb-layer diversity in European forest plant communities.

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