The effects of water temperature and ammonia concentration on swimming capacity of brook charr (Salvelinus fontinalis, Mitchill, 1814) were determined by measuring gait transition speed (U(gt), cms(-1)), maximum burst speed (U(max), cms(-1)), tail-beat amplitude (a, cm), tail-beat frequency (f, Hz), maximum acceleration of bursts (A(max), cms(-2)), number of bursts, distance of bursts (cm) and ...

Diel activity patterns are often fixed within species such that most animals can be classified as diurnal, crepuscular, or nocturnal, and have sensory abilities that reflect when they are active. However, many snake species appear capable of switching between diurnal and nocturnal activity. Here, we evaluate the hypothesis that some species are constrained in their activity by the sensory cues ...

a total of 76 specimens of three fish species including: hemiculter lucisculus (41), liza auratus (16) and gasterosteus aculeutus (19) were caught using handnet from 3 station in zardi river in the south-eastern costal of caspian sea at autumn and winter 2009 and spring 2010. the fishes were transported alive to the laboratory of shahid rajaee site. they were killed by cutting their spinal cord...

Liza S. Comita*, Maria Uriarte, Jill Thompson†, Inge Jonckheere, Charles D. Canham and Jess K. Zimmerman Department of Ecology, Evolution and Environmental Biology, Columbia University, 1200 Amsterdam Ave., New York, NY 10027, USA; Institute for Tropical Ecosystem Studies, Universidad de Puerto Rico, PO Box 21910, San Juan, PR 00931-3341, USA; Biosystems Department, Geomatics Group, Katholieke ...

Bela Bauer, Liza Huijse, Erez Berg, Matthias Troyer, and Kareljan Schoutens Station Q, Microsoft Research, Santa Barbara, CA 93106-6105, USA Department of Physics, Harvard University, Cambridge MA 02138 Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel Theoretische Physik, ETH Zurich, 8093 Zurich, Switzerland Institute for Theoretical Physics, Universi...

The southern population of Mugil liza is distributed from Argentina (47°S) to the state São Paulo, Brazil (23°S). Young mullets use estuaries as nursery grounds, and prior recruitment into they surf zone a temporary habitat. Based on 12 consecutive months sampling, this study used generalized linear models (GLM) analyse relationships between environmental variables presence relative abundance y...

Monogenoidea pathogenic activity can elicit various histological responses in fish. Species of Ligophorus are specific parasites of mullets, and its relationship with host fish may result in a moderate pathogenic action. In order to ascertain this relationship, estuarine mullets (Mugil liza) were collected in an estuary, reared in laboratory, for three weeks, and forwarded for histological and ...

Twenty-four polymorphic microsatellite loci were isolated and characterized for Liza affinis using a (GT)13-enriched genomic library. The number of alleles per locus ranged from 3 to 9, with a mean number of 6.250. The observed and expected heterozygosities ranged from 0.417 to 1.000 and from 0.550 to 0.861, with an average of 0.859 and 0.779, respectively. Deviation from Hardy-Weinberg proport...