ABSTRACT
During a study of the helminth parasites of carangid fish of the Gulf of Mexico, Protomicrocotyle mirabilis and a new member of that genus were found. The aim of the present study is to provide new morphological and sequences of 28s rDNA and CO1 mtDNA for P. mirabilis and describe the new species. Between 2005-2022, 73 specimens of Caranx spp. were purchased from local fishermen of the littoral waters of the Gulf of Mexico. Protomicrocotyle veracruzensis sp. nov. is most similar to P. mirabilis than to P. ivoriensis, the only members of the genus known from the Greater Atlantic Ocean Basin. Protomicrocotyle veracruzensis sp. nov. can be distinguished from those two species by the arrangement and number of testes. Measurement data on the haptoral armature for the new species is provided and the potential value and need for comparative data from these structures of other members of the genus is discussed. The results of the molecular analysis and the morphometric analysis of 91 characters confirmed that this new species belongs to Protomicrocotyle.
Subject(s)
Fish Diseases , Mirabilis , Parasites , Trematoda , Trematode Infections , Animals , Trematode Infections/veterinary , Mexico , Phylogeny , Fishes , Fish Diseases/parasitologyABSTRACT
A total of 802 individuals of Lutjanus guttatus (Steindachner, 1869) specimens were collected over a 10-year period (August 2012 to February 2021) from four locations on the south-central Pacific coast of Mexico. Their parasite communities were quantified and analyzed to determine if they experience significant spatial and inter-annual variations. Thirty-two taxa of metazoan parasite were recovered and identified: four species of Digenea, four Monogenea, one Cestoda, two Acanthocephala, seven Nematoda, one Hirudinea, and nine of Crustacea (six Copepoda, and three Isopoda). Species richness was greatest among the digenean group, which represented 25% of the total species recovered, followed by the nematodes (22% of total species). Species richness at the component community level (10 to 20 species) was similar to reported richness in other Lutjanus spp. The component communities and infracommunities exhibited a similar pattern: low species richness and diversity, and dominance by a single species, mainly the monogenean Haliotrematoides guttati. Parasite community structure and species composition varied through the years, as well as between sampling locations. Variations were possibly caused by a combination of biotic and abiotic factors which generated notable changes in the infection levels of several component species. However, the similarity in the parasite species composition was high locally for short-term periods (one or two years). This result, therefore, suggests that parasite communities of L. guttatus may be more predictable locally, but only for short-term periods.
Subject(s)
Copepoda , Fish Diseases , Parasites , Perciformes , Animals , Fish Diseases/epidemiology , Fish Diseases/parasitology , Humans , Mexico/epidemiology , Perciformes/parasitologyABSTRACT
Three new species of Acanthobothrium Blanchard, 1848 (Onchoproteocephalidea: Onchobothriidae) are described from Pacific coastal waters of Mexico. Based on four criteria for categorization of species of Acanthobothrium, the three new species belong to Category 2 species, characterized by their total length (< 15 mm), number of proglottids (< 50) and testes (<80), and with asymmetrical ovary. Acanthobothrium ppdeleoni n. sp. from diamond stingray Hypanus dipterurus (Jordan Gilbert) is differentiated from congeners by a combination of characters including total length of the whole worms, size of the scolex and bothridia, length of the bases of the hooks and abaxial prongs, and the size of the cirrus sacs in mature proglottids. Acanthobothrium hypanus n. sp. and A. sinaloaensis n. sp. are described from longtail stingray Hypanus longus (Garman). Acanthobothrium hypanus n. sp. is differentiated by a combination of characters including size of the scolex and bothridia, diameter of the accessory sucker, length of the abaxial prongs, size of the cirrus sacs and testes in mature proglottids. Acanthobothrium sinaloaensis n. sp. is differentiated by a combination of characters including size of the scolex and bothridia, diameter of the accessory sucker, size of the cirrus sacs in mature proglottids, number of immature proglottids, number of testes, the length of the lobes of the ovary and the absence of velum between medial margin of bothridia. Thirteen species of Acanthobothrium have been reported previously from elasmobranchs from the Pacific coast of Mexico. In the present study, the number of species is elevated to 16.
Subject(s)
Cestoda , Cestode Infections , Fish Diseases , Skates, Fish , Animals , Female , MexicoABSTRACT
Parasite communities in Caranx sexfasciatus were characterized and analyzed to determine any interannual variations in structure and/or species composition. In total, 422 C. sexfasciatus were collected from Acapulco Bay, Mexico, between May 2016 and March 2019. Thirty-two taxa of metazoan parasites were identified: five Monogenea, thirteen Digenea, one Acanthocephala, one Cestoda, three Nematoda, seven Copepoda, and two Isopoda. Monogeneans were the most frequent and abundant parasite species in all sampling years. Parasite species richness at the component community level varied significantly from 8 (May 2016) to 25 (March 2019) and was similar to previous reports for other species of Carangidae. The component communities and infracommunities in C. sexfasciatus were characterized by low parasite species numbers, low diversity, and dominance of a single species (the monogenean Neomicrocotyle pacifica). Parasite community structure and species composition varied between sampling years and climatic seasons. Seasonal or local fluctuations in some biotic and abiotic environmental factors probably explain these variations.
TITLE: Variation interannuelle des communautés de parasites métazoaires de la carangue à gros yeux Caranx sexfasciatus (Pisces, Carangidae). ABSTRACT: Les communautés de parasites de Caranx sexfasciatus ont été caractérisées et analysées afin de déterminer si elles connaissent des variations interannuelles dans la structure et/ou la composition des espèces. Au total, 422 C. sexfasciatus ont été collectés dans la baie d'Acapulco, au Mexique, entre mai 2016 et mars 2019. Trente-deux taxons de parasites métazoaires ont été identifiés : cinq Monogenea, treize Digenea, un Acanthocephala, un Cestoda, trois Nematoda, sept Copepoda et deux Isopoda. Les monogènes étaient les espèces de parasites les plus fréquentes et les plus abondantes au cours de toutes les années d'échantillonnage. La richesse en espèces de parasites au niveau de la communauté des composants variait considérablement de 8 (mai 2016) à 25 (mars 2019) et était similaire aux rapports précédents pour d'autres espèces de Carangidae. Les communautés et infracommunautés de C. sexfasciatus étaient caractérisées par un faible nombre d'espèces de parasites, une faible diversité et la dominance d'une seule espèce (le monogène Neomicrocotyle pacifica). La structure des communautés de parasites et la composition des espèces variaient entre les années d'échantillonnage et les saisons climatiques. Les fluctuations saisonnières ou locales de certains facteurs environnementaux biotiques et abiotiques expliquent probablement ces variations.
Subject(s)
Fish Diseases/parasitology , Parasites/classification , Perciformes/parasitology , Acanthocephala/classification , Acanthocephala/isolation & purification , Animals , Cestoda/classification , Cestoda/isolation & purification , Climate , Copepoda , Ecosystem , Mexico , Nematoda/classification , Nematoda/isolation & purification , Seasons , Trematoda/classification , Trematoda/isolation & purificationABSTRACT
Two species of Acanthobothrium (Onchoproteocephalidea: Onchobothriidae) are described from the spiral intestine of Narcineentemedor Jordan & Starks, 1895, in Bahía de Acapulco, Acapulco, Guerrero, Mexico. Based on the four criteria used for the identification of species of Acanthobothrium, A.soniae sp. nov. is a Category 2 species (less than 15 mm in total length with less than 50 proglottids, less than 80 testes, and with the ovary asymmetrical in shape). Acanthobothriumvidali sp. nov. is a Category 6 species (more than 15 mm in total length with more than 50 proglottids, fewer than 80 testes, and the ovary is asymmetrical). The new species differ from similar species from the Pacific Ocean by total length, the number of proglottids, diameter of the accessory sucker, the length of the cirrus sac, the number of testes per proglottid and the measurements of hooks. With the recognition of A.soniae sp. nov. and A.vidali sp. nov., 42 species of Acanthobothrium have been reported from the Pacific coast of the Americas. This is the first report of species of Acanthobothrium from a member of Narcine from Mexico and it brings the number of species reported from elasmobranchs from the Pacific Coast of Mexico to 13.
ABSTRACT
Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infects the gill of the Atlantic guitarfish, Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) from littoral waters of Celestún, Yucatán, Mexico. It is assigned to Neonchocotyle because it has, among other features, an asymmetrical haptor, a seminal receptacle, a smooth oötype, and an egg with two elongate filaments. It differs from Neonchocotyle pastinacae, the only congener, by having a small body (821 long by 315 wide, length to width = 2.6:1), two pairs of microhooks between the haptoral appendix suckers, extracaecal (submarginal) vaginal pores, and 5-9 testes. This is the first record of a species of Neonchocotyle in the Gulf of Mexico, the first monogenean reported from P. lentiginosus in Mexico and the second species of Hexabothriidae reported from Mexico.
Subject(s)
Fish Diseases/parasitology , Skates, Fish/parasitology , Trematoda/anatomy & histology , Trematoda/isolation & purification , Trematode Infections/veterinary , Animals , Female , Gulf of Mexico , MaleABSTRACT
The helminthological examination of nine individuals of Aetobatus cf. narinari (spotted eagle ray; raya pinta; arraia pintada) revealed the presence of an undescribed species of cestode of the genus Acanthobothrium. The stingrays were collected from four locations in México: Laguna Términos, south of Isla del Carmen and the marine waters north of Isla del Carmen and Champotón, in the State of Campeche, and Isla Holbox, State of Quintana Roo. The new species, nominated Acanthobothrium marquesi, is a category 3 species (i.e, the strobila is long, has more than 50 proglottids, the numerous testicles greater than 80, and has asymmetrically-lobed ovaries); at the present, the only category 3 species that has been reported in the Western Atlantic Ocean is Acanthobothrium tortum. Acanthobothrium marquesi n. sp. can be distinguished from A. tortum by length (26.1 cm vs. 10.6 cm), greater number of proglottids (1,549 vs. 656), a larger scolex (707 µm long by 872 µm wide vs. 699 µm long by 665 µm wide), larger bothridia (626 µm long by 274 µm wide vs. 563 µm long by 238 µm wide). This is the first report of a species of Acanthobothrium from the Mexican coast of the Gulf México.
Subject(s)
Cestoda/anatomy & histology , Cestoda/isolation & purification , Cestode Infections/veterinary , Fish Diseases/parasitology , Skates, Fish/parasitology , Animals , Cestode Infections/parasitology , Mexico , Microscopy, Electron, ScanningABSTRACT
Abstract Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infects the gill of the Atlantic guitarfish, Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) from littoral waters of Celestún, Yucatán, Mexico. It is assigned to Neonchocotyle because it has, among other features, an asymmetrical haptor, a seminal receptacle, a smooth oötype, and an egg with two elongate filaments. It differs from Neonchocotyle pastinacae, the only congener, by having a small body (821 long by 315 wide, length to width = 2.6:1), two pairs of microhooks between the haptoral appendix suckers, extracaecal (submarginal) vaginal pores, and 5-9 testes. This is the first record of a species of Neonchocotyle in the Gulf of Mexico, the first monogenean reported from P. lentiginosus in Mexico and the second species of Hexabothriidae reported from Mexico.
Resumo Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infecta brânquia de Pseudobatos lentiginosus, (Rhinopristiformes, Rhinobatidae) de águas litorâneas ao largo da costa de Celestún, Yucatán, México. É atribuído a Neonchocotyle porque tem, entre outras características, um haptor assimétrico, um receptáculo seminal, um tipo oótipo liso e um ovo com dois filamentos alongados. Difere de Neonchocotyle pastinacae, o único congênere, por ter um corpo pequeno (821 de comprimento por 315 de largura, comprimento a largura = 2,6: 1), dois pares de microganchos entre as ventosas do apêndice haptoral, poros vaginais extracaecais (submarginal) e 5-9 testículos. Este é o primeiro registro de uma espécie de Neonchocotyle no Golfo do México, o primeiro monogenético registrado em P. lentiginosus no México e a segunda espécie de Hexabothriidae relatada no México.
Subject(s)
Animals , Male , Female , Trematoda/isolation & purification , Trematoda/anatomy & histology , Trematode Infections/veterinary , Skates, Fish/parasitology , Fish Diseases/parasitology , Gulf of MexicoABSTRACT
Abstract The helminthological examination of nine individuals of Aetobatus cf. narinari (spotted eagle ray; raya pinta; arraia pintada) revealed the presence of an undescribed species of cestode of the genus Acanthobothrium. The stingrays were collected from four locations in México: Laguna Términos, south of Isla del Carmen and the marine waters north of Isla del Carmen and Champotón, in the State of Campeche, and Isla Holbox, State of Quintana Roo. The new species, nominated Acanthobothrium marquesi, is a category 3 species (i.e, the strobila is long, has more than 50 proglottids, the numerous testicles greater than 80, and has asymmetrically-lobed ovaries); at the present, the only category 3 species that has been reported in the Western Atlantic Ocean is Acanthobothrium tortum. Acanthobothrium marquesi n. sp. can be distinguished from A. tortum by length (26.1 cm vs. 10.6 cm), greater number of proglottids (1,549 vs. 656), a larger scolex (707 µm long by 872 µm wide vs. 699 µm long by 665 µm wide), larger bothridia (626 µm long by 274 µm wide vs. 563 µm long by 238 µm wide). This is the first report of a species of Acanthobothrium from the Mexican coast of the Gulf México.
Resumo O exame helmintológico do trato digestivo de nove espécimes de Aetobatus cf. narinari (arraia pintada) revelou a presença de uma nova espécie de cestódeo do gênero Acanthobothrium. As arraias foram coletadas de quatro locais no México: Laguna Términos, ao sul de Isla del Carmen e nas águas marinhas ao norte de Isla del Carmen e Champotón, no estado de Campeche, e Isla Holbox, estado de Quintana Roo. A nova espécie foi denominada Acanthobothrium marquesi, pertencente a uma espécie da categoria 3 (estrobilo longo, tendo mais de 50 proglotes, numerosos testículos, superiores a 80, e ovários assimetricamente lobados). Apenas outra espécie deste gênero, Acanthobothrium tortum pertence a categoria 3, no Oceano Atlântico Ocidental. Acanthobothrium marquesi n. sp. se distingue de A. tortum por ser mais longo (26,1 cm vs. 10,6 cm), possuir maior número de proglotes (1.549 vs. 656), ter um escolex maior (707 µm de comprimento por 872 µm de largura vs. 699 µm de comprimento por 666 µm de largura), e botridias maiores (626 µm de comprimento por 274 µm de largura vs. 563 µm de comprimento por 238 µm de largura). Este é o primeiro relato de uma espécie de Acanthobothrium do Golfo do México.
Subject(s)
Animals , Skates, Fish/parasitology , Cestoda/isolation & purification , Cestoda/anatomy & histology , Cestode Infections/veterinary , Fish Diseases/parasitology , Microscopy, Electron, Scanning , Cestode Infections/parasitology , MexicoABSTRACT
Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infects the gill of the Atlantic guitarfish, Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) from littoral waters of Celestún, Yucatán, Mexico. It is assigned to Neonchocotyle because it has, among other features, an asymmetrical haptor, a seminal receptacle, a smooth oõtype, and an egg with two elongate filaments. It differs from Neonchocotyle pastinacae, the only congener, by having a small body (821 long by 315 wide, length to width = 2.6:1), two pairs of microhooks between the haptoral appendix suckers, extracaecal (submarginal) vaginal pores, and 5-9 testes. This is the first record of a species of Neonchocotyle in the Gulf of Mexico, the first monogenean reported from P. lentiginosus in Mexico and the second species of Hexabothriidae reported from Mexico.(AU)
Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infecta brânquia de Pseudobatos lentiginosus, (Rhinopristiformes, Rhinobatidae) de águas litorâneas ao largo da costa de Celestún, Yucatán, México. É atribuído a Neonchocotyle porque tem, entre outras características, um haptor assimétrico, um receptáculo seminal, um tipo oótipo liso e um ovo com dois filamentos alongados. Difere de Neonchocotyle pastinacae, o único congênere, por ter um corpo pequeno (821 de comprimento por 315 de largura, comprimento a largura = 2,6: 1), dois pares de microganchos entre as ventosas do apêndice haptoral, poros vaginais extracaecais (submarginal) e 5-9 testículos. Este é o primeiro registro de uma espécie de Neonchocotyle no Golfo do México, o primeiro monogenético registrado em P. lentiginosus no México e a segunda espécie de Hexabothriidae relatada no México.(AU)
Subject(s)
Animals , Skates, Fish/parasitology , Helminths/classification , Fishes/parasitology , Platyhelminths/classificationABSTRACT
The helminthological examination of nine individuals of Aetobatus cf. narinari (spotted eagle ray; raya pinta; arraia pintada) revealed the presence of an undescribed species of cestode of the genus Acanthobothrium. The stingrays were collected from four locations in México: Laguna Términos, south of Isla del Carmen and the marine waters north of Isla del Carmen and Champotón, in the State of Campeche, and Isla Holbox, State of Quintana Roo. The new species, nominated Acanthobothrium marquesi, is a category 3 species (i.e, the strobila is long, has more than 50 proglottids, the numerous testicles greater than 80, and has asymmetrically-lobed ovaries); at the present, the only category 3 species that has been reported in the Western Atlantic Ocean is Acanthobothrium tortum. Acanthobothrium marquesi n. sp. can be distinguished from A. tortum by length (26.1 cm vs. 10.6 cm), greater number of proglottids (1,549 vs. 656), a larger scolex (707 µm long by 872 µm wide vs. 699 µm long by 665 µm wide), larger bothridia (626 µm long by 274 µm wide vs. 563 µm long by 238 µm wide). This is the first report of a species of Acanthobothrium from the Mexican coast of the Gulf México.(AU)
O exame helmintológico do trato digestivo de nove espécimes de Aetobatus cf. narinari (arraia pintada) revelou a presença de uma nova espécie de cestódeo do gênero Acanthobothrium. As arraias foram coletadas de quatro locais no México: Laguna Términos, ao sul de Isla del Carmen e nas águas marinhas ao norte de Isla del Carmen e Champotón, no estado de Campeche, e Isla Holbox, estado de Quintana Roo. A nova espécie foi denominada Acanthobothrium marquesi, pertencente a uma espécie da categoria 3 (estrobilo longo, tendo mais de 50 proglotes, numerosos testículos, superiores a 80, e ovários assimetricamente lobados). Apenas outra espécie deste gênero, Acanthobothrium tortum pertence a categoria 3, no Oceano Atlântico Ocidental. Acanthobothrium marquesi n. sp. se distingue de A. tortum por ser mais longo (26,1 cm vs. 10,6 cm), possuir maior número de proglotes (1.549 vs. 656), ter um escolex maior (707 µm de comprimento por 872 µm de largura vs. 699 µm de comprimento por 666 µm de largura), e botridias maiores (626 µm de comprimento por 274 µm de largura vs. 563 µm de comprimento por 238 µm de largura). Este é o primeiro relato de uma espécie de Acanthobothrium do Golfo do México.(AU)
Subject(s)
Animals , Skates, Fish/parasitology , Platyhelminths/classification , Platyhelminths/parasitologyABSTRACT
The helminthological examination of nine individuals of Aetobatus cf. narinari (spotted eagle ray; raya pinta; arraia pintada) revealed the presence of an undescribed species of cestode of the genus Acanthobothrium. The stingrays were collected from four locations in México: Laguna Términos, south of Isla del Carmen and the marine waters north of Isla del Carmen and Champotón, in the State of Campeche, and Isla Holbox, State of Quintana Roo. The new species, nominated Acanthobothrium marquesi, is a category 3 species (i.e, the strobila is long, has more than 50 proglottids, the numerous testicles greater than 80, and has asymmetrically-lobed ovaries); at the present, the only category 3 species that has been reported in the Western Atlantic Ocean is Acanthobothrium tortum. Acanthobothrium marquesi n. sp. can be distinguished from A. tortum by length (26.1 cm vs. 10.6 cm), greater number of proglottids (1,549 vs. 656), a larger scolex (707 µm long by 872 µm wide vs. 699 µm long by 665 µm wide), larger bothridia (626 µm long by 274 µm wide vs. 563 µm long by 238 µm wide). This is the first report of a species of Acanthobothrium from the Mexican coast of the Gulf México.(AU)
O exame helmintológico do trato digestivo de nove espécimes de Aetobatus cf. narinari (arraia pintada) revelou a presença de uma nova espécie de cestódeo do gênero Acanthobothrium. As arraias foram coletadas de quatro locais no México: Laguna Términos, ao sul de Isla del Carmen e nas águas marinhas ao norte de Isla del Carmen e Champotón, no estado de Campeche, e Isla Holbox, estado de Quintana Roo. A nova espécie foi denominada Acanthobothrium marquesi, pertencente a uma espécie da categoria 3 (estrobilo longo, tendo mais de 50 proglotes, numerosos testículos, superiores a 80, e ovários assimetricamente lobados). Apenas outra espécie deste gênero, Acanthobothrium tortum pertence a categoria 3, no Oceano Atlântico Ocidental. Acanthobothrium marquesi n. sp. se distingue de A. tortum por ser mais longo (26,1 cm vs. 10,6 cm), possuir maior número de proglotes (1.549 vs. 656), ter um escolex maior (707 µm de comprimento por 872 µm de largura vs. 699 µm de comprimento por 666 µm de largura), e botridias maiores (626 µm de comprimento por 274 µm de largura vs. 563 µm de comprimento por 238 µm de largura). Este é o primeiro relato de uma espécie de Acanthobothrium do Golfo do México.(AU)
Subject(s)
Animals , Trematoda/anatomy & histology , Trematoda/classificationABSTRACT
Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infects the gill of the Atlantic guitarfish, Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) from littoral waters of Celestún, Yucatán, Mexico. It is assigned to Neonchocotyle because it has, among other features, an asymmetrical haptor, a seminal receptacle, a smooth oõtype, and an egg with two elongate filaments. It differs from Neonchocotyle pastinacae, the only congener, by having a small body (821 long by 315 wide, length to width = 2.6:1), two pairs of microhooks between the haptoral appendix suckers, extracaecal (submarginal) vaginal pores, and 5-9 testes. This is the first record of a species of Neonchocotyle in the Gulf of Mexico, the first monogenean reported from P. lentiginosus in Mexico and the second species of Hexabothriidae reported from Mexico.(AU)
Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infecta brânquia de Pseudobatos lentiginosus, (Rhinopristiformes, Rhinobatidae) de águas litorâneas ao largo da costa de Celestún, Yucatán, México. É atribuído a Neonchocotyle porque tem, entre outras características, um haptor assimétrico, um receptáculo seminal, um tipo oótipo liso e um ovo com dois filamentos alongados. Difere de Neonchocotyle pastinacae, o único congênere, por ter um corpo pequeno (821 de comprimento por 315 de largura, comprimento a largura = 2,6: 1), dois pares de microganchos entre as ventosas do apêndice haptoral, poros vaginais extracaecais (submarginal) e 5-9 testículos. Este é o primeiro registro de uma espécie de Neonchocotyle no Golfo do México, o primeiro monogenético registrado em P. lentiginosus no México e a segunda espécie de Hexabothriidae relatada no México.(AU)
Subject(s)
Animals , Skates, Fish/parasitology , Trematoda/classification , Trematoda/pathogenicityABSTRACT
Paracreptotremarosenthali sp. n. was discovered in the intestine of Xiphophorusmalinche and Pseudoxiphophorusjonesii, collected from the headwaters of Río Malila, tributary of Río Conzintla, in the Río Pánuco basin, Hidalgo, México, during 2008-2009. The new species differs from the five known species of Paracreptotrema Choudhury, Pérez-Ponce de León, Brooks & Daverdin, 2006 by having vitelline follicles that extend from a level anterior to the pharynx to mid-testes, the seminal vesicle which is more extensively folded, and a wider cirrus sac. The new species resembles Paracreptotremaheterandriae in the length of its ceca, which surpasses the posterior margin of the ovary but do not reach the testes. A key to the species of Paracreptotrema is provided.
ABSTRACT
The state of Hidalgo (Mexico) is an important region from the point of view of biodiversity. However, there exists a significant gap in accessible knowledge about species diversity and distribution, especially regarding to freshwater ecosystems. This dataset comprises the sampling records of two projects developed in Hidalgo between 2007 and 2009 about the freshwater fish communities of Tecocomulco lake and rivers belonging to the Metztitlán Canyon Biosphere Reserve. It contains the taxonomic identity (species level) and basic biometric data (total length and weight) as well as date of collection and coordinates of more than 9000 specimens. This dataset is the primary result of the first and unrepeated exhaustive freshwater fish's survey of Metztitlán Canyon Biosphere Reserve and Tecocomulco lake. It incorporates seven more species to the regional fish fauna, and new exclusive biometric data of ten species. This dataset can be used by studies dealing with, among other interests, North American freshwater fish diversity (species richness, distribution patterns) and biometric analyses, useful for the management and conservation of these areas. The complete dataset is also provided in Darwin Core Archive format.
ABSTRACT
Determinar niveles de bioacumulación de metales (Cd, Cr, Pb y Al) en tejidos y fluidos corporales de los habitantes de Xochitlán, Estado de Hidalgo, ha sido el objetivo de este estudio. Con vistas a realizar valoraciones de riesgo y probables daños a la salud de sus pobladores, se inició el estudio con una caracterización sociodemográfica, con pobladores de entre seis y 90 años de edad. Como criterio de exclusión se consideró: malformaciones congénitas, padecimientos inmunosupresivos y menos de cinco años de residencia en la localidad. Se presentó una pirámide poblacional invertida; de un total de 1947 habitantes, la población de entre 10 y 19 años ocupa el centro de la pirámide, que adelgaza en los extremos de la vida (5 > X > 60 años). Se ha propuesto una metodología, combinada con los lineamientos establecidos por la Agencia Para Sustancias Tóxicas y Registro de Enfermedades (ATSDR 2000) y la Agencia de Protección Ambiental de Estados Unidos (U.S. EPA 2005) y adicionando un instrumento de encuesta (anamnesis clínica) para la caracterización de individuos y poblaciones con amplio enfoque clínico. De la interrelación de concentraciones de metales en fluidos y tejidos con aspectos de riesgos ambientales, se podrá decantar un diagnóstico situacional actual, retrospectivo y una visión a futuro sobre el comportamiento de la contaminación y su impacto en factores de salud. La bioacumulación de metales evaluados estuvo presente entodos los fluidos y tejidos de los pobladores seleccionados de entre seis y 90 años de edad. Se ha encontrado relación entre estos resultados y los de estudios previos de acumulación de metales en aguas, suelos y cultivos.
To determine levels of metal bio accumulation (Cd, Cr, Pb and Al) in weaves and corporal fluids of the inhabitants of Xochitlán, Hidalgo, has been the objective of this study. With a view to realising valuations of risk and probable damages to the health of its settlers, the study with a sociodemographic characterization began, with settlers between six and 90 years of age. As exclusion criterion were considered, congenital malformations, immuno suppressive sufferings and less than five years of residence in the locality. An inverted population pyramid appeared; of a total of 1947 inhabitants, the population between 10 and 19 years occupies the center of the pyramid, that thins in the ends of the life (5> X> 60 years). A methodology, combined with the established by the ATSDR and the EPA has seted out and adding an instrument of survey (clinical anamnesis) for the characterization of individuals and populations with ample clinical approach. Of the interrelation of flowed and woven metal concentrations in, with aspects of environmental risks it will be possible to be poured off a present, retrospective situational diagnosis and a vision to future, on the behavior of the contamination and its impact in health factors. The evaluated metal bio accumulation was present in all the fluids and weaves of the settlers selected between six and 90 years of age. One has been a relation between these results and those of previous studies of metal accumulation in waters, grounds and cultures.
Subject(s)
Humans , Male , Adolescent , Adult , Female , Child, Preschool , Child , Middle Aged , Aged, 80 and over , Bioaccumulation , Impacts of Polution on Health , Metals/adverse effects , MexicoABSTRACT
Desde 1995 se ha registrado un alto grado de deterioro en el río Atoyac, México, debido a los asentamientos humanos e industriales. El objetivo de este estudio fue evaluar la condición actual del río y establecer la relación entre los parámetros de la legislación vigente y las pruebas de toxicidad y mutagenicidad. Se determinaron parámetros de campo (color, olor, temperatura, CE, pH, OD), fisicoquímicos (SST, SDT, SSe, DBO5, DQO y GyA, Ntotal, Norg, Ptotal, Porg, ortofosfatos), metales pesados (As, Cd, Cu, Cr, Cr+6, Hg, Ni, Pb, Zn, Al, Fe, Mn), microbiológicos (coliformes fecales) con base en los límites máximos permisibles (LMP) en la NOM-001-ECOL-1996 y en los CE-CCA-001/89, análisis de toxicidad (Vibrio fischeri, Daphnia magna) y mutagenicidad (prueba de Ames con microsomas/Salmonella typhimurium), en época de sequía en nueve estaciones a lo largo de 85km. Los valores para OD, DBO5 y DQO fueron de 2-6, 11-270 y 22-1841mg·l-1, respectivamente. Los metales fueron detectados por debajo de los LMP en todas las estaciones, excepto en la estación 5 (0,002mg·l-1 de Hg) y la 8 (0,13mg·l-1 de Cr+6). Los coliformes fecales rebasaron los LMP en todas las estaciones. Los valores para Vibrio fischeri, Daphnia magna y se encuentran en 2-28 y 1-4UT, y para la prueba de Ames entre 5 y 63RM, indicando toxicidad y mutagenicidad desde la estación 3 a la 9. Se registró contaminación alta según la legislación vigente y un riesgo para la salud pública de acuerdo a los parámetros toxicológicos y mutagénicos.
A high degree of deterioration has been registered in the Atoyac river, Mexico, since 1995, due to local residences and industrial development. The aim of this study was to evaluate current environmental conditions at nine stations during the drought season along 85km of the river and to establish the relationship between current legislation parameters and toxicity and mutagenicity tests. Environmental quality was quantified using field observations (color, odor, temperature, CE, pH, and DO), physicochemical (SST, SDT, SSe, DBO5, DQO, GyA, Ntotal, Norg, Ptotal, Porg and orthophosphates), heavy metals (As, Cd, Cu, Cr, Cr+6, Hg, Ni, Pb, Zn, Al, Fe y Mn), microbiological (fecal coliforms) by comparison with the maximum permissible level (MPL) NOM-001-ECOL-1996 and CE-CCA-001/89, and toxicity (Vibrio fischeri, Daphnia magna) and mutagenicity (Salmonella/microsome, or Ames test) analysis. Values for DO, DBO5 and DQO were 2-6, 11-270 and 22-1841mg·l-1, respectively. Concentrations of heavy metals were below the MPL except at stations 5 (0.002mg·l-1 Hg) and 8 (0.13mg·l-1 Cr+6). Fecal coliform bacteria were above the MPL at all stations. Values for Vibrio fischeri, Daphnia magna and the Ames test were 2-28 UT, 1-4 UT and 5-63 RM, respectively, which indicated toxicity and mutagenicity from stations 3 to 9. The high level of contamination in this zone indicates that it is necessary to evaluate adherence to approved standards and to modify the existing regulations in order to include additional contamination parameters.
Desde 1995 tem sido registrado um alto grau de deterioração no rio Atoyac, México, devido aos assentamentos humanos e industriais. O objetivo deste estudo foi avaliar a condição atual do rio e estabelecer a relação entre os parâmetros da legislação vigente e as provas de toxicidade e mutagenicidade. Determinaram-se parâmetros de campo (cor, olor, temperatura, CE, pH, OD), fisicoquímicos (SST, SDT, SSe, DBO5, DQO e GyA, Ntotal, Norg, Ptotal, Porg, ortofosfatos), metais pesados (As, Cd, Cu, Cr, Cr+6, Hg, Ni, Pb, Zn, Al, Fe, Mn), microbiológicos (coliformes fecais) baseados nos limites máximos permissíveis (LMP) na NOM-001-ECOL-1996 e nos CE-CCA-001/89, análises de toxicidade (Vibrio fischeri, Daphnia magna) e mutagenicidade (prova de Ames com microssomas/Salmonella typhimurium), em época de seca em nove estações ao longo de 85km. Os valores para OD, DBO5 e DQO foram de 2-6, 11-270 e 22-1841mg·l-1, respectivamente. Os metais foram detectados por baixo dos LMP em todas as estações, exceto na estação 5 (0,002mg·l-1 de Hg) e a 8 (0,13mg·l-1 de Cr+6). Os coliformes fecais ultrapassaram os LMP em todas as estações. Os valores para Vibrio fischeri, Daphnia magna e se encontram em 2-28 e 1-4UT, e para a prova de Ames entre 5 e 63RM, indicando toxicidade e mutagenicidade desde a estação 3 a 9. Registrou-se contaminação alta segundo a legislação vigente e um risco para a saúde pública pelos parâmetros toxicológicos e mutagênicos.