While the survival value of paternal care is well understood, little is known about its physiological basis. Here we investigate the neuroendocrine contributions to paternal care in the monogamous cichlid, Amatitlania nigrofasciata. We first explored the dynamic range of paternal care in three experimental groups: biparental males (control fathers housed with their mate), single fathers (mate r...

With over 600 species and coming in all sizes, shapes, patterns colors, Neotropical cichlids of Central South America are popular pet fish. But most don't start out with bright bold colors contrasting across their bodies. So just how does a drab juvenile turn into vivid adult? Denis Prazdnikov Fedor Shkil the Severtsov Institute Ecology Evolution, Russia, think that they've discovered answer: t...

Two new species of the genus Ypsolopha Latreille, 1796 are described from Far East of Russia: Ypsolopha melanofuscella sp. n. and Ypsolopha straminella sp. n. Two new synomymies are proposed: Ypsolopha ulingensis Yang, 1977, a new junior synonym of Ypsolopha costibasella (Caradja, 1939); and Cerostoma falculella Erschoff, 1877, a new junior synonym of Ypsolopha asperella Linnaeus, 1761. The spe...

Using probiotics can control pathogens by a variety of mechanisms. Probiotics can promote growth performance and have, therefore, become increasingly important in the aquaculture industry. Convict Cichlid belongs to the family of Cichlidae and is known for its rapid development in laboratory conditions and is suitable for behavioral examinations. The aim of this study was to evaluate the effect...

The ichneumonid genus Habronyx is recorded for the first time from Peru and Ecuador, and three new species are described and figured-Habronyx (Camposcopus) flavus Alvarado, new species, H. (Habronyx) nigrofasciata Alvarado, new species, and H. (H.) saqsaywaman Alvarado, new species. Hadronyx (H.) punensis is recorded for the first time in Peru. Habronyx (H.) nigrofasciata was reared from Paracl...

more than 32 alien (exotic) fish species belonging to 10 orders and 12 families (cyprinidae, gobiidae, salmonidae, anguilidae, mugilidae, centrarchidae, heteropneustidae, gasterosteidae, cichlidae, poecilidae, adrianichthyidae and pleuronectidae) were reported from iran of which 25 species are confirmed by specimens. some of the alien fishes (e.g., cyprinus carpio , carassius auratus , pesudora...

Few studies have examined how landmarks affect territories' fundamental characteristics. In this field study, we investigated effects of landmarks on territory size, shape and location in a cichlid fish (Amatitlania siquia). We provided cans as breeding sites and used plastic plants as landmarks. During 10 min trials, we recorded locations where residents chased intruders and used those locatio...

The inland fish fauna of El Salvador and its distribution was originally described in 1925 by Samuel Hildebrand. That work has been the main source of information for freshwater fishes of El Salvador up to today. Based on the combination of an intensive literature review, electronic database searches, re-identification of museum specimens, and fieldwork, we hereby provide an updated checklist o...