Results 21 to 30 of about 3,364 (181)

On traits matching and the modular organization of food web and occurrence networks

Journal of Animal Ecology, EarlyView.
What mechanisms shape ecological networks? In Paraná River piscivores, species traits and abundance scaling promote modular structures. Our findings reveal how communities self‐organize and highlight the conditions needed to sustain them. Abstract Modularity and nestedness have been observed recurrently across different ecological networks, including ...
Dalmiro Borzone Mas, Pablo A. Scarabotti, Pablo A. Vaschetto, Patricio Alvarenga, Martin Vazquez, Matías Arim   +5 more
wiley   +1 more source

NUEVOS REGISTROS DE RINELORICARIA (TELEOSTEI: SILURIFORMES) PARA URUGUAY

Boletín de la Sociedad Zoológica del Uruguay, 2023
En base a material de la Colección de Peces de la Facultad de Ciencias (UDELAR), en esta nota realizamos los primeros registros de tres especies de Rineloricaria (Siluriformes: Loricariidae) para Uruguay.
Loureiro Barrella, Marcelo, Bessonart Rodríguez, José María, Aguilar-Sosa, Ana Belén   +2 more
openaire   +2 more sources

Estimation of jundiá (Rhamdia quelen) dietary amino acid requirements based on muscle amino acid composition Estimativa da exigência dietética em aminoácidos para o jundiá (Rhamdia quelen) baseada na composição muscular

Scientia Agricola, 2005
Jundiá, Rhamdia quelen (Quoy & Gaimard, 1824), is a catfish native to Central and South America. The species has a number of excellent farming features, such as easy handling, low temperature resistance, efficient feed conversion, flavorsome meat and ...
Gustavo Meyer, Débora Machado Fracalossi   +1 more
doaj   +1 more source

Complete Mitochondrial Genome of <i>Gyrodactylus nigeri</i> (Platyhelminthes: Monogenea). [PDF]

Ecol Evol
The fish Yunnanilus niger is the host of Gyrodactylus nigeri. The mitochondrial genome of G. nigeri is 14,903 bp in length. Phylogenetic analyses indicated that this species belonged to the genus Gyrodactylus and Gyrodactylidae forms an independent monophyletic clade within Gyrodactylidea.
Yang Y, Liu Y, Yue W, Chen Y, Kang M, He Y, Chen T.   +6 more
europepmc   +2 more sources

Genome Expansion of ZPB1(a) and ZPC1(a) in Basal Species or Liver Expression of ZPB1a and ZPC1aa in Advanced Species, Two Different Strategies to Ensure Sufficient ZP Synthesis in Teleosts

Integrative Zoology, EarlyView.
We found that teleosts employed two different strategies to ensure sufficient ZP (zona pellucida) synthesis: expansion of ZPB1(a) and ZPC1(a) in basal species or liver expression of ZPB1a and ZPC1aa in advanced species. The N‐terminus of expanded ZPB1(a) or ZPC1(a) and liver‐expressed ZPB1a contains repeated units or low‐complexity regions to form ...
Tian Gao, Suying Ma, Shiyi Zhang, Fan Bai, Lingyao Gan, Wenjing Tao, Feilong Wang, Deshou Wang, Lina Sun   +8 more
wiley   +1 more source

Cytotaxonomic and evolutionary considerations about karyotipic data of fishes from the Iguaçu River Basin in South of Brazil

Brazilian Archives of Biology and Technology, 2007
The cytogenetic data available in the literature about the ichthyofauna of the Iguaçu River basin were analyzed in this review. The ichthyofauna was characterized by the high level of endemism and by the low diversity of species.
Daniel Luis Zanella Kantek, Roger Raupp Cipriano, Vinícius Abilhoa, Roberto Ferreira Artoni, Marta Margarete Cestari   +4 more
doaj   +1 more source

Traditional and Geometric Morphometrics and Invariant Shape Descriptors of Catfish Otoliths in the Yucatán Peninsula: Tools for Species Identification and Individual Size Estimation at Maya Archaeological Sites

Archaeometry, EarlyView.
ABSTRACT This study investigates the use of otolith shape analysis for species identification and size estimation in Ariopsis felis and Bagre marinus, based on 181 modern otoliths obtained from a scientific collection and recent sampling in the coastal regions of Campeche and Yucatán, as well as 39 archaeological otoliths corresponding to the Early ...
Ariana Solis‐Gómez, Jorge Luis Pérez‐Gonzalez, Nayeli Jiménez‐Cano, Maribel Badillo‐Alemán, Alfredo Gallardo‐Torres, Nidiyare Hevia‐Montiel, Daniel Arceo‐Carranza, Xavier Chiappa‐Carrara   +7 more
wiley   +1 more source

Nitrogen excretion and oxygen consumption under severe hypoxia in siluriform fishes from the Amazon

Journal of Fish Biology, EarlyView.
Abstract Siluriform fishes collected from the Rio Negro and Rio Solimões proved to be highly resistant to aquatic hypoxia. In all four species analysed in this study, aquatic oxygen consumption significantly decreased from normoxic levels at water PO2 values near 1 kPa. Air‐breathing activity was observed only in Sturisoma sp. (Rio Negro).
Bernd Pelster, Chris M. Wood, Adalberto Luis Val   +2 more
wiley   +1 more source

New insights into the putative XX/XY sex chromosomal system in blue‐eyed red‐fin pleco Hypostomus soniae (Siluriformes, Loricariidae)

Journal of Fish Biology, EarlyView.
Abstract Blue‐eyed red‐fin pleco Hypostomus soniae (family Loricariidae) presented a putative sex system XX/XY in early stage. Aiming to explore the inter‐populational karyotypic variation and proposed emergence of the XX/XY system, we studied 13 H. soniae individuals (6 males, 7 females) from the Tapajós River.
Luan Aércio Melo Maciel, Renata Coelho Rodrigues Noronha, Bruno Rafael Ribeiro de Almeida, Manoella Gemaque Cavalcante, Cleusa Yoshiko Nagamachi, Julio Cesar Pieczarka, Luís Reginaldo R. Rodrigues   +6 more
wiley   +1 more source

Molecular phylogeny of thorny catfishes (Siluriformes: Doradidae)

Molecular Phylogenetics and Evolution, 2013
Doradidae is a monophyletic catfish family endemic to continental South America, and composed of 93 valid species here placed in 31 genera. Existing phylogenetic hypotheses for Doradidae are derived from comprehensive analyses of morphological data, and a single molecular-based study on a limited subset of taxa.
Arce H., Mariangeles, Reis, Roberto E., Geneva, Anthony J., Sabaj Pérez, Mark H.   +3 more
openaire   +2 more sources